CA2149740C - Intra-premises communication system - Google Patents
Intra-premises communication system Download PDFInfo
- Publication number
- CA2149740C CA2149740C CA002149740A CA2149740A CA2149740C CA 2149740 C CA2149740 C CA 2149740C CA 002149740 A CA002149740 A CA 002149740A CA 2149740 A CA2149740 A CA 2149740A CA 2149740 C CA2149740 C CA 2149740C
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- Prior art keywords
- premises
- local transmitter
- receivers
- communication system
- intra
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/733—Cordless telephones with a plurality of base stations connected to a plurality of lines
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
Abstract
An intra-premises communication system enables the use of a preinstalled wired transmission channels, yet allowing a particular communication system to be located at a desired region in the premises.
The system comprises an exchange box adapted to be installed in the premises and provided with different interfaces for connection to different networks. A plurality of the wired transmission channels extend from the exchange box and terminate to receptacles which are installed in the premises and have common connectors. A plurality of indoor wireless terminals of different types are provided for use within the premises. A plurality of local transmitter-receivers of different types are provided in correspondence to the types of the wireless terminals. Each of the local transmitter-receivers is detachably and selectively mounted to the common connector of the receptacle for wired communication with one of the networks through the associated transmission channel. The local transmitter-receivers have individual antennas or the like member for wireless communication with at least one of the terminals. The exchange box includes a switch for connecting the transmission channels selectively to particular ones of the interfaces, thereby allocating local transmitter-receivers and the associated terminals to the different networks. The receptacles can be preinstalled in the like fashion as the conventional electrical receptacles so that a desired wireless communication system can be located at a suitable region simply by mounting the local transmitter-receiver of the selected type to the common connector of the receptacle.
The system comprises an exchange box adapted to be installed in the premises and provided with different interfaces for connection to different networks. A plurality of the wired transmission channels extend from the exchange box and terminate to receptacles which are installed in the premises and have common connectors. A plurality of indoor wireless terminals of different types are provided for use within the premises. A plurality of local transmitter-receivers of different types are provided in correspondence to the types of the wireless terminals. Each of the local transmitter-receivers is detachably and selectively mounted to the common connector of the receptacle for wired communication with one of the networks through the associated transmission channel. The local transmitter-receivers have individual antennas or the like member for wireless communication with at least one of the terminals. The exchange box includes a switch for connecting the transmission channels selectively to particular ones of the interfaces, thereby allocating local transmitter-receivers and the associated terminals to the different networks. The receptacles can be preinstalled in the like fashion as the conventional electrical receptacles so that a desired wireless communication system can be located at a suitable region simply by mounting the local transmitter-receiver of the selected type to the common connector of the receptacle.
Description
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SPECIFICATION
INTRA-PREMISES COMMUNICATION SYSTEM
BACKGROIJND OF THE INVENTION
1. Field of the Invention s The present invention is directed to an intra-premises communication system which combines wired and wireless communications for use in a premises.
SPECIFICATION
INTRA-PREMISES COMMUNICATION SYSTEM
BACKGROIJND OF THE INVENTION
1. Field of the Invention s The present invention is directed to an intra-premises communication system which combines wired and wireless communications for use in a premises.
2. Description of the prior art v Recently, an information tr~n.~mi.~sion system relying in part a wireless communication has been proposed for use in an office or factory. The system may be a local area network (LAN) for intercommunication among data termin~l~, a telephone network system called a personal handy phone system (PHS) which will be soon available in Japan to enable the use of a wireless handy phone for local telecommunication within the premises as well as for telecommunication with outside network, and/or a load management system for monitoring and controlling a load such as a lighting equipment by the use of a remote controller. The system includes local transmitter-receivers which are adapted to be mounted on a wall, ceiling or floor of the premises for wireless communication among indoor termin~l~ through the local transmitter-receivers. For constructing the LAN network with wireless data terminals, a hub is provided for connection through a wired transmission channel to the local transmitter-receiver for enabling data transmission among the termin~l~
through the hub. For constructing the telephone network with handy phone termin~l~, a private branch exchange (PBX) is provided for connection through the wired transmission channel to the local 21~97AO
transmitter-receiver to enable the telecommunication with the outside network in addition to the telecommunication between the handy phone termin~ . Further, for constructing the load management systém with remote controllers and a load, a gateway is provided for connection s through the like wired transmission channel to the local transmitter-receiver in order to transmit the signal between the remote controller to a designated load for monitoring the load condition and/or controlling the load. In view of the above, the intra-premises communication system is desired to combine wireless and wired communication for o constructing any one of the above networks.
When inst~lling the above network in the premises, it is desirable to preinstall the wired tr~n~mi.~sion channels. However, since a decision is usually made after the construction which system is utilized in a particular region of the premises and where the local transmitter-receivers corresponding to the selected system are located, the preinstallation is practically difficult and obsolete. Consequently, the wired transmission channels have to be installed after construction in order to satisfy the need of implementing the selected network.
SUMMARY OF THE INVENTION
The above problem has been elimin~ted in the present invention which provides an intra-premises communication system enabling the use of a preinstalled wired tr~n~mi~sion channels, yet allowing a particular communication system to be located at a desired region in the premises. The intra-premises communication system in accordance 2s with the present invention comprises an exchange box which is adapted to be installed in the premises and is provided with different interfaces for connection to different networks. A plurality of wired transmission channels are installed in the premises to extend from the exchange box and terminate to receptacles which are also installed in the premises and have common connectors of identical configuration. A plurality of indoor wireless termin~l~ of different types are provided for use within 5 the premises. A plurality of local transmitter-receivers of different types are provided in correspondence to the types of the wireless termin~l~. Each of the local transmitter-receivers is detachably and selectively mounted to the common connector of the receptacle for wired communication with one of the networks through the associated o tr~n~mi~sion channel. The local transmitter-receivers have individual antennas or the like member for wireless communication with at least one of the termin~l~ and have a conversion circuit for transfer between the information carried by way of the wired communication through the tr~n.~mi~sion channel and the information carried by way of the wireless S communication. The exchange box is provided with a switch for connecting the transmission channels selectively to particular ones of the interfaces, thereby allocating local transmitter-receivers and the associated termin~l~ to the different networks. With this configuration, the receptacles can be preinstalled in the like fashion as the 20 conventional electrical receptacles so that a desired wireless communication system can be located at a suitable region simply by mounting the local transmitter-receiver of the selected type to the common connector of the receptacle. Further with the provision of the exchange box, thus constituted wireless communication system can be 25 selectively connected to one of the different networks through the associated tr~n~mi~sion channel and the interface, whereby the wireless communication system can be linked to the corresponding network.
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through the hub. For constructing the telephone network with handy phone termin~l~, a private branch exchange (PBX) is provided for connection through the wired transmission channel to the local 21~97AO
transmitter-receiver to enable the telecommunication with the outside network in addition to the telecommunication between the handy phone termin~ . Further, for constructing the load management systém with remote controllers and a load, a gateway is provided for connection s through the like wired transmission channel to the local transmitter-receiver in order to transmit the signal between the remote controller to a designated load for monitoring the load condition and/or controlling the load. In view of the above, the intra-premises communication system is desired to combine wireless and wired communication for o constructing any one of the above networks.
When inst~lling the above network in the premises, it is desirable to preinstall the wired tr~n~mi.~sion channels. However, since a decision is usually made after the construction which system is utilized in a particular region of the premises and where the local transmitter-receivers corresponding to the selected system are located, the preinstallation is practically difficult and obsolete. Consequently, the wired transmission channels have to be installed after construction in order to satisfy the need of implementing the selected network.
SUMMARY OF THE INVENTION
The above problem has been elimin~ted in the present invention which provides an intra-premises communication system enabling the use of a preinstalled wired tr~n~mi~sion channels, yet allowing a particular communication system to be located at a desired region in the premises. The intra-premises communication system in accordance 2s with the present invention comprises an exchange box which is adapted to be installed in the premises and is provided with different interfaces for connection to different networks. A plurality of wired transmission channels are installed in the premises to extend from the exchange box and terminate to receptacles which are also installed in the premises and have common connectors of identical configuration. A plurality of indoor wireless termin~l~ of different types are provided for use within 5 the premises. A plurality of local transmitter-receivers of different types are provided in correspondence to the types of the wireless termin~l~. Each of the local transmitter-receivers is detachably and selectively mounted to the common connector of the receptacle for wired communication with one of the networks through the associated o tr~n~mi~sion channel. The local transmitter-receivers have individual antennas or the like member for wireless communication with at least one of the termin~l~ and have a conversion circuit for transfer between the information carried by way of the wired communication through the tr~n.~mi~sion channel and the information carried by way of the wireless S communication. The exchange box is provided with a switch for connecting the transmission channels selectively to particular ones of the interfaces, thereby allocating local transmitter-receivers and the associated termin~l~ to the different networks. With this configuration, the receptacles can be preinstalled in the like fashion as the 20 conventional electrical receptacles so that a desired wireless communication system can be located at a suitable region simply by mounting the local transmitter-receiver of the selected type to the common connector of the receptacle. Further with the provision of the exchange box, thus constituted wireless communication system can be 25 selectively connected to one of the different networks through the associated tr~n~mi~sion channel and the interface, whereby the wireless communication system can be linked to the corresponding network.
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In a preferred embodiment, the wireless terminals include data terminals and handy phone terminals. One type of the local transmitter-receiver includes a circuit which is cooperative with a hub, oné of the interfaces, to construct a local area network (LAN) which enables data 5 transmission among the data terminals. Another type of the local transmitter-receiver includes a circuit for intercommunication with the phone termin~l~. The circuit is connected through the transmission channel to a private branch exchange (PBX~ ~or connecting the handy phone termin~ to the outside network.
- 10 ~~ Preferably, the interfaces are arranged to enable intercommunication between the networks, for example, between the LAN and the telephone system~for rnaking data and facsimile transmission to and from the data termin~l~ through the telephone line.
When one of the network is made as a load management system for monitoring and/or controlling a load such as a lighting equipment, the load management system can be linked though the interfaces to the LAN and the telephone system so that the data termin~l~ and the handy phones can access the load easily and conveniently for efficient load management.
The receptacle comprises a base plate with the connector. The base plate carries a pair of mounting brackets which are pivotally - supported at one end to the base plate and are provided with screws.The screw extends through a periphery of the base plate and through an intermediate portion of the bracket. The base plate is placed on a mounting surface of a wall, ceiling or floor in order to project the brackets behind the mounting surface through a mounting hole formed in the surface. The screw is held in threaded engagement with the 5 ~l~g~A~
bracket in such a manner that tightening of the screw causes the brackets to expand behind the mounting surface for gripping the periphery of the mounting hole between the brackets and the circumference of the base plate. Thus, the receptacle can be readily installed on the wall, ceiling or the floor of the premises simply by drilling the mounting hole, placing the base plate around the mounting hole, and tightening the screws.
The receptacle has a pair of electrical contacts which are to be connected to a voltage source through a suitable cables routed in the - 10 wal~, ceiling or floor of the premises. The receptacle is formed with a pair of slots which engages with prongs projecting from the local transmitter-receiver. The electrical contacts are positioned adjacent the slots to be in electrical connection with the prongs for supplying an electric power to the local transmitter-receiver. The connector of the receptacle is provided in the form of a modular jack connected to the transmission channel. The local transmitter-receiver having a plug detachable to the modular jack. Thus, the modular jack is utilized as the common connector for connection of the local transmitter-receiver to the transmission channel.
These and still other object and advantageous features of the present invention will become more apparent from the following detailed description of the embodiment when taken in conjunction with the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view illustrating an intra-premises communication system in accordance with a preferred embodiment of the present invention;
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- 10 ~~ Preferably, the interfaces are arranged to enable intercommunication between the networks, for example, between the LAN and the telephone system~for rnaking data and facsimile transmission to and from the data termin~l~ through the telephone line.
When one of the network is made as a load management system for monitoring and/or controlling a load such as a lighting equipment, the load management system can be linked though the interfaces to the LAN and the telephone system so that the data termin~l~ and the handy phones can access the load easily and conveniently for efficient load management.
The receptacle comprises a base plate with the connector. The base plate carries a pair of mounting brackets which are pivotally - supported at one end to the base plate and are provided with screws.The screw extends through a periphery of the base plate and through an intermediate portion of the bracket. The base plate is placed on a mounting surface of a wall, ceiling or floor in order to project the brackets behind the mounting surface through a mounting hole formed in the surface. The screw is held in threaded engagement with the 5 ~l~g~A~
bracket in such a manner that tightening of the screw causes the brackets to expand behind the mounting surface for gripping the periphery of the mounting hole between the brackets and the circumference of the base plate. Thus, the receptacle can be readily installed on the wall, ceiling or the floor of the premises simply by drilling the mounting hole, placing the base plate around the mounting hole, and tightening the screws.
The receptacle has a pair of electrical contacts which are to be connected to a voltage source through a suitable cables routed in the - 10 wal~, ceiling or floor of the premises. The receptacle is formed with a pair of slots which engages with prongs projecting from the local transmitter-receiver. The electrical contacts are positioned adjacent the slots to be in electrical connection with the prongs for supplying an electric power to the local transmitter-receiver. The connector of the receptacle is provided in the form of a modular jack connected to the transmission channel. The local transmitter-receiver having a plug detachable to the modular jack. Thus, the modular jack is utilized as the common connector for connection of the local transmitter-receiver to the transmission channel.
These and still other object and advantageous features of the present invention will become more apparent from the following detailed description of the embodiment when taken in conjunction with the attached drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic view illustrating an intra-premises communication system in accordance with a preferred embodiment of the present invention;
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-FIG. 2 is a block diagram of a communication unit provided in a data terminal of the above system;
FIG. 3 is a block diagram of a local transmitter-receiver in the form of a LAN unit utilized in the above system;
s FIGS. 4A to 4D are diagrams illustrating formats of signals transferred between the communication unit and the LAN unit;
FIG. 5 is a flow chart illustrating data transfer between the data termin~
- FIG. 6 is a block diagram of a telephone network realized by the present ~o syst~m;
FIG. 7 is a block diagram of a persona handy phone utilized in the above telephone network;
FIG. 8 is a block diagram of another local transmitter-receiver in the form of a personal handy phone relay unit;
15 FIGS. 9A to 9C are diagrams illustrating formats.of signals transferred between the handy phone and the relay unit; - -FIGS. lOA to lOC are diagrams illustrating formats of signals transferred between the handy phone relay unit and a private branch exchange (PBX);
20 FIG. 11 illustrates a scheme of telecommunication between the PBX
and the personal handy phone;
- FIG. 12 is a block diagram of a load management network realized by the present system;
FIG. 13 is a block diagram illustrating a supervisor utilized in the 25 present system;
FIG. 14 is a location table of the local transmitter-receivers as displayed in the supervisor;
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FIG. 3 is a block diagram of a local transmitter-receiver in the form of a LAN unit utilized in the above system;
s FIGS. 4A to 4D are diagrams illustrating formats of signals transferred between the communication unit and the LAN unit;
FIG. 5 is a flow chart illustrating data transfer between the data termin~
- FIG. 6 is a block diagram of a telephone network realized by the present ~o syst~m;
FIG. 7 is a block diagram of a persona handy phone utilized in the above telephone network;
FIG. 8 is a block diagram of another local transmitter-receiver in the form of a personal handy phone relay unit;
15 FIGS. 9A to 9C are diagrams illustrating formats.of signals transferred between the handy phone and the relay unit; - -FIGS. lOA to lOC are diagrams illustrating formats of signals transferred between the handy phone relay unit and a private branch exchange (PBX);
20 FIG. 11 illustrates a scheme of telecommunication between the PBX
and the personal handy phone;
- FIG. 12 is a block diagram of a load management network realized by the present system;
FIG. 13 is a block diagram illustrating a supervisor utilized in the 25 present system;
FIG. 14 is a location table of the local transmitter-receivers as displayed in the supervisor;
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FIG. 15 is a perspective view of the local transmitter-receiver as mounted to a receptacle;
FIG. 16 is an exploded perspective view of the receptacle; and FIG 17 is an exploded perspective view of the local transmitter-5 reCelVer.
DETAILED DESCRIPTION OF THE EMBODIMENT
Referring now to FIG. 1, there is shown an intra-premises communication system in accordance with a preferred embodiment of the present invention. The system comprises an exchange box 10 and a l0 plur~lity of receptacles 20 connected to the exchange box 10 by way of individual wired transmission channels 20. Also connected to the exchange box 10 are different interfaces composed of a hub 11 for an LAN (local area network), a PBX (private branch exchange) 12, and a gateway 13 for a building automation network or a load m~n~gement 15 network carrying one or more load such as a lighting equipment. The exchange box 10, the transmission channels 20 and the receptacles 30 are preinstalled in the wall, ceiling, or floor of the premises. The receptacles 30 are provided with individual connectors of the identical configuration to which a variety of local transmitter-receivers are 20 selectively and detachably mounted for wiring connection to the transmission channel 20. The local transmitter-receivers 40 include a LAN unit 41 for wireless communication with data termin~l.s 4, a phone unit 42 for wireless communication with personal handy phone termin~ls 2, a remote controller unit 43 for wireless communication 25 with remote control termin~ls 3, a detector unit 44 and a camera unit 45 with a television camera 46.
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The transmission channel 20 may be a twist pair wire, coaxial cable, or optical fiber. When the optical fiber is utilized, the receptacle 30 is provided with a converter for conversion electrical signal into optical signal and vice versa.
The exchange box 10 comprises a patch panel (not shown) as a switch mechanism for connecting the interfaces 11 to 13 to selected ones of the transmission channels 20, i.e., the receptacles 30 by switching patch cords.
For constructing the LAN network, a personal computer having a - lO mod-em unit is utilized as the data termin~l 1. As shown in Fig. 2, the modem unit comprises an interface 50 which conform to PCMCIA
regulation for connection with the computer. The modem unit is provided with a pair of antennas 51 and 52 for wireless communication with the LAN unit 41. The antenna 51 is connected through a two-way switch 53 to a receiving circuit 55, while the antenna 52 is connected through the two-way switch to the receiver 55 as well as through a switch 54 to a transmitting circuit 56. Thus, the receiving circuit 55 can use either of the antennas 51 and 52 to effect diversity signal reception.
A wireless controller 57 is provided to effect the switching between the signal tr~n.~mi.~sion and reception as well as the switching between the antennas 51 and 52 in diversity signal reception. Further, the wireless controller 57 is responsible for controlling the other associated function of the modem unit such as for determining the timin~ of data transmission and reception. The computer delivers signals prescribed by a wired LAN protocol to the interface 50. A protocol converter 58 is connected to the interface 50 for making protocol conve-rsion between _ 9 2~974~
the wired LAN and the wireless LAN. Data to be transmitted from the data terminal 1 is fed through the wireless controller 57 to a coder 59 where it is encoded for data compression or the like. Thus encoded digital signal is then modulated at a modulator 60 and is further 5 converted into a high frequency signal at the transmitting circuit 56. A
reference oscillator 61 is provided to generate a clock signal utilized in the wireless controller 57. Based upon the clock signal a high frequency signal is generated for signal mixing at the transmitting circuit 56. For this purpose, a first oscillator 62 generates a high - lo freq~lency signal in synchronism with the clock signal from the reference oscillator 61, which high frequency signal is then mixed at the transmitting circuit 56 with an output of the modulator 60 for effecting frequency conversion of the output of the modulator 60. A second oscillator 63 is provided to generate a high frequency signal in s synchronism with the clock signal of the reference oscillator 60 in order to use the high frequency signal as a carrier. Modulation at the -modulator 60 may be made in accordance with FSK, PSK, QAM or the like method. At the receiving circuit 55 the reception signal is mixed with the high frequency signal from the first oscillator 62 to be 20 converted into a low frequency signal which is subsequently demodulated at a demodulator 64 into a digital signal by the use of the high frequency signal from the second oscillator 63. The digital signal is further decoded at a decoder 65 followed by being fed through the wireless controller 57 to the protocol converter 58 where it is converted 25 to a data conformed with the wired LAN protocol. A data buffer 66 is coupled to the protocol converter 58 for temporarily storing data during 214974~
the protocol conversion in order to avoid data loss which might otherwise occur due to the difference in data transfer speed between the wired LAN and the wireless LAN. The modem unit can be provided as a card to be inserted into the slot of an IC card drive of the computer or 5 as a board to be mounted in an expansion bus slot of the computer.
As shown in FIG. 3, the LAN unit 41 has the like circuit configuration as the modem unit except that a wire controller 70, a coder 71, a decoder 72, and a transceiver 73 are provided instead of the interface 50 utilized in the modem unit for connection with the wired - lO LAN through the transmission channel 20. The transceiver 73 acts as an interface with the wired LAN and is controlled by the wire controller 70 to switch the data delivery to and from the wired LAN at a suitable timing. The coder 71 and decoder 72 are provided between the transceiver 73 and the protocol converter 88 for data delivery to and lS from the wired LAN. The LAN unit includes the elements which are identical in function to those utilized in the modem. The elements are antennas 81 and 82, switches 83 and 84, receiving circuit 85, transmitting circuit 86, wireless controller 87, coder 89, modulator 90, reference oscillator 91, first oscillator 92, second oscillator 93, 20 demodulator 94, and decoder 95.
The wireless controller 57 and 87 operate differently according to a condition whether all of the data termin~l~ 1 are within an accessible region to the associated LAN unit 41 for wireless communication therebetween or anyone of the data termin~l~ 1 is connected to the wired 25 LAN. As shown in FIGS. 4A to 4C, there are three types of formats for the signal transmitted between the LAN unit and the modem unit of the 1l 21d9740 -data terminal 1, i.e., for the input signal to the modulators 60 and 90, and output signal from the demodulators 64 and 94. The format of FIG.
4A is for the signal polling the data termin~ 1 by the LAN unit 41 is composed of a preamble PA making synchronization to a destination, a 5 type TP identifying the polling, an address SA designating the destination address, and a check code CH. The polling is made regularly to the data termin~l~ 1 located within the accessible region by successively ch~nging the addresses. The data terminal 1 issues the signal in the format of FIG. 4B when the address carried on the radio - lo signal from the LAN unit 41 coincide with the own address. The signal is composed of a preamble PA, a type TP identifying the data transmission and specifying data size, tr~n~mi.~sion data DT, and a check code CH. The tr~n.cmi~sion data DT is a data in accordance with the protocol of the wired LAN and, as shown in FIGS. 4D, is composed 15 of a source address AT, a destination address AS, a data size SZ, a transmission data DD, and a check code CC for the wired LAN which utilizes the signal of the format having a preamble PP prefixed to the transmission data DT. Upon receiving the radio signal of the format of FIG. 4B, the LAN unit 41 issues to the data terminal 1 a confirmation 20 radio signal having the format of FIG. 4C composed of a preamble PA, - a type TP identifying the confirmation, and a check code CH, whereby the data terminal 1 confirms that the communication is normal.
When the data termin~l~ (A) constructing the wireless LAN is to transfer data through the hub 11 to other data termin~l~ B constructing a 25 wired LAN, a procedure is made in accordance with the flowchart of FIG. 5. Firstly, data terminal (A) converts transmission data at protocol 21~97~
converter 58 into corresponding data of the format of ~IG. 4B including the destination address [S1]. When this terminal (A) receives the signal in the format of FIG. 4B from LAN unit 41B and the destination address in the signal is coincident with the own address [S2], the terminal (A) 5 transmits the data prepared in step [S1] as a wireless signal [S3]. Upon receiving the wireless signal from the terminal (A) [S4], the LAN unit 41 responds to check whether the tr~n~mi~sion is normal or not. When not normal lS5], the LAN UIlit 41 waits to receive the data from the terminal (A) for a predetermined interval without making the polling lO and=stops signal processing [S6] if normal data tr~n~mi~sion is made in that interval. When the data tr~n~mi~sion is normal, the LAN unit 41 returns "ACK" signal in the format of FIG. 4C to the terminal (A3 [S7].
Upon receiving "ACK" signal [S8], the terminal (A) proceeds to the next step, otherwise continue to re-transmit the data only for a 15 prescribed number of times until receiving "ACK" signal from the LAN
unit. In response to the normal data tr~n~mi~sion acknowledge, the LAN unit 41 derives data DT at the protocol converter 88 and appends the preamble PP to data DT to give a corresponding data signal for wired communication [S9]. Then, the LAN unit 41 transmits data DD
20 by "CSMAICD" method to the data terminal (B) having an address coincident with the destination address AS [S10]. Thus, the terminal (B) constructing the wired LAN can receive data DD from the terminal (A) of the wireless LAN [S11]. The terminal (B) may be a server. The hub 11 may be utilized for intercommunication among a plurality of 25 networks.
Now, explanat;on is made to a telephone system utili7in~ the 2~9740 personal phone terminals 2. As shown in FIG. 6, the telephone system comprises the PBX 12 having extension lines 21 leading the exchange boxes 10 from which the transmission channels 20 extend to the receptacles 30, respectively for connection to the phone units 42, which 5 in turn establish wireless communication with the phone termin~l~ 2. A
conventional telephone 2a may be connected through a wire 22 to the exchange box for wire connection with the PBX 12. The phone unit 42 is connected through the exchange box 10 to an interface 101 in the PBX 12, while the telephone 2a is connected through the exchange box o 10 to an interface 102 in the PBX 12. The interface 101 is designed for wireless telecommunication made between the phone termin~l~ 2 and PBX, while the interface 102 is for wired telecommunication between the conventional telephone 2a and PBX. The PBX 12 includes another interface 103 for connection with the central office line 23. A switch 15 circuit 104 is provided in PBX to connect and disconnect the interfaces 101 and 102 to and from the interface 103 under the control of a control circuit 105 for enabling public telecommunication and private telecommunication between the phone termin~l~ 2 and the telephones 2a.
Also included in the PBX 12 is another interface 106 for connection 20 with other networks, for example, the LAN and the load m~n~ement network in order to transfer through the central office line 23 the data handled by the data termin~l~ 1 and to control the load from the phone termin~ls 2 and the telephone 2a.
As shown in FIG. 7, the phone terminal 2 comprises a microphone 25 111 and a speaker 112 connected to a channel codec (coder-decoder) 114 through a speech network 113 including an antiside tone circuit.
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Audio data encoded in the channel codec 114 is modulated at a modem 115 and is subsequently converted at a frequency converter 116 into a high frequency signal to be transmitted through an antenna 117. A high frequency signal received at the antenna 117 is frequency converted at 5 the converter 116 and is subsequently demodulated at the modem 115 so as to be decoded at the channel codec 114 and fed to the speaker 112.
The modem 11S and the frequency converter 116 are controlled by a PLL circuit 118 to operate synchronously. A control circuit 119 made of a microprocessor is provided to control the operation of the above - lO elements.
As shown in FIG. 8, the phone unit 42 has the like configuration as the phone terminal 2 except that a data tr~n.~mi.~sion circuit 123 provided instead of the speech network 113 for transmitting and receiving audio signal to and from the PBX 12 through a channel coded lS 124. Therefore, the phone unit 42 is composed of the channel codec 124, modem 125, frequency converter 126, antenna 127, PLL circuit 128, and control circuit 129 all of the same function as those in the phone terminal-2.
The phone unit 42 gives wireless signal for communication with 20 the phone terminal 2 which signal has a protocol in conformity with RCR ST D-28 and is capable of simultaneous communication with up to four phone termin~l~. That is, the phone unit 42 transmits data composed of four frames Fl, as shown in FIG. 9A, sequentially to the four phone termin~l~ 2 by TDMA technique, and thereafter receive data 25 composed of four frames F2 sequentially from the four phone terminals 2. The frames Fl and F2 are provided to give either of a control slot or communication slot of a fixed length. The control slot comprises, as shown in FIG. 9B, a ramp time R(4) for transient response, start symbol SS(2), control signal CAC (62), synchronization word UW(32), control signal CAC(108), error detection code CRC(16). Numerals in 5 parenthesis represent bit numbers. The communication slot comprises, as shown FIG. 9C, a ramp time R(4), start symbol SS(2), permeable PR(6), synchronization word UW(16), information I(180) such as digitized voice, and error detection code CRC(16).
The wired communication between the phone unit 42 and the PBX
o 12 is made by transferring signal of digital data, as shown in FIG. 10A
to 10C. The digital PBX 12 transmits to the phone unit 42 data within a frame FR1 which alternates with a frame FR2 within which the PBX
receives data from the phone unit, as shown in FIG. 10A. These frames FR1 and FR2 has a format capable of transferring plurals words each 15 composed of 36 bits. The format is, as shown in FIG. 10B, composed of word number WD(8), data CL(8) indicating start and stop of digital transfer, data WVV, and parity PT(1). The data WW is a 36-bits signal which is, as shown in FIG. 10C, composed of four sets of 8-bits data B
to B4 of actual information to be transferred plus 1-bit control data D
20 to D4, each set provided for each of the four phone termin~l~ 2.
Communication sequence between the PBX 12 and the phone unit 42 is shown in FIG. 11. When the phone terminal 2 is called, the PBX
12 designates one of the phone unit 42 associated with the called terminal and delivers the incoming to thus designated phone unit 42, 25 which in turn gives a rin~in~ to the called phone terminal 2. Then, the phone terminal 2 responds to return a demand of link establishment to 21497~0 the phone unit 42, after which the phone unit 42 assigns a link channel to the phone terminal 2. Upon receiving an ringing response from the phone terminal 2, the phone unit 42 gives a call setting to the terminal 2 which in turn acknowledges of the call setting. Thereafter, the terminal 5 2 issues a call and answer signal to the phone unit 42. Upon this occurrence, the phone unit 42 delivers the answer signal to the PBX 12 and at the same time delivers an answer confirmation to the phone termin~ 2. Thus, the communicat;on link is made between the PBX 12 and the phone terminal 2 for telecommunication therebetween.
lO - The load management system will be explained with reference to FIG. 12. The system includes the gateway 13 in the form of a time division multiplexing controller, the remote controller unit 43, and the detector unit 44, which units are mounted to the receptacles 30. The gateway 13 comprises a master device 131 and a plurality of console 15 devices 132 provided with relays for controlling to turn on and off the loads, for example, lighting equipment~ 4 which are connected through a cable 25 to the console devices 132. The console device 132 is connected in a multi-drop manner to the master device 131 through a two-wire line 26 and is further wired to the exchange box 10. The 20 remote controller unit 43 and the detector unit 44 are thus connected to the console devices 132 through the exchange box 10 for giving a control signal thereto. The detector device 44 includes a human detector which gives an output indicating that a human comes within a detection area covered by the detector unit 44 for notifying the presence 2s of the human in the region. The master device 131 gives an access to the console devices 132 cyclically by designating individual addresses 2i49740 given to the console devices 132 for checking the control signal fed from the units 43 and 44 and for controlling to turn on and off the lighting equipment 4 associated with the console devices being accessed.
For example, when the remote controller 3 gives a light remote signal to 5 turn on the particular lighting equipment 4, the remote controller unit 43 responds to transmit the corresponding control signal to the master device 131 when accessed by the master device 131. Then, the master device 131 instructs the termin~l device 132 associated with the particular lighting equipment 4 for turning on the equipment 4. The lO detector unit 44 is likewise connected to the console unit 132 to give the - control signal when the human comes within the detection area such that the master unit 131 instructs the console unit 132 to turn on the associated lighting equipment.
In order to supervise the operations of the above systems, a 15 supervisor 140 is connected to the hub 11. The supervisor may be an independent device or configured as a part of a server for the wired LAN, and comprises, as shown in FIG. 13, an interface 141 for data transfer with the wired LAN, a controller 142 made of a microprocessor, a memory 143, an input section 144 for entry the setting of the 20 receptacles 30, and a display 145 for notifying the status of the receptacles 30 and the types of units mounted thereto in a manner as shown in FIG. 14, wherein A, B, C in the location column indicate a section within the premises and 1, 2, 3 indicate a division in the section.
For example, A-1 in the location column means that the receptacle is 25 located at a division 1 of an section A. In FIG. 14, PHP and LAN-RPT
in the unit type column represent the phone unit 42 and the LAN unit 41, ~149~4 respectively.
Referring to FIGS.15 and 16, explanation is made to the structure of the receptacle 30 having the connector common to the above described units 41 to 44. The receptacle 30 comprises a disc base 31 5 carrying the connector 32 in the form of a modular jack and a cover 33 assembled to the base 31 by means of screws 34. The base 31 has a center opening 35 with an inner flange 36 projecting inwardly from the lower circumference of the opening to support the jack 32 so that the jack 32 is rotatably received in the opening. The jack 32 is provided in lO its lower end with a shutter (not shown) and with a plurality of terminal lugs exposed in the upper end for connection with a cable 37. A jack cover 38 is hooked to the upper end of the jack 32 to conceal connection of the cable 37 and the jack. The jack 32 is held on the base 31 together with the jack cover 38 by means of a retainer plate 151 secured to the 15 base by screws 152, whereby the jack 32 is held between the retainer plate 151 and the inner flange 36. The retainer plate 151 has a center hole 153 into which a rounded projection 39 on the jack cover 38 fits for allowing the jack 36 to rotate about a vertical axis together with the jack cover 38. A coil spring 154 fits loosely around the jack 32 20 between the retainer plate 151 and a flange 32a at the lower end of the jack 3. The upper end of the coil spring 154 is engaged to the jack 32 and the lower end of the coil spring 154 is engaged to a stopper 31a formed on the base 31 adjacent the center opening 35 such that as the jack 32 rotates relative to the base 31 the spring 154 is wound to 25 thereby accumulate a bias of returning the jack. The base 31 is formed with a pair of arcuate slots 155 which are diametrically opposed about the center opening 35 to receive a pair of prongs 174 projecting from each of the units 41 to 44. Secured to the base 31 adjacent the slots 155 are contacts 156 which are connected to electrical wires 157 and which comes into electrical contact with the prongs 174 when the unit is 5 mounted to the receptacle 30 for supplying voltage to the unit. Each of the units 41 to 44 is configured to have, in addition to the prongs, a plug 176 which is inserted to the jack 32 for signal correspondence therebetween. Mounting of the unit to the receptacle 30 is made by inserting the prongs 174 into the slots 155 and subsequently rotating to o some angle, after which the prongs 174 comes into firm engagement with the ends of the slots 155 while the jack 32 rotates correspondingly - to wind the coil spring 154. The cover 33 fitted over the jack 32 to the base 31 is formed with quick connection sockets (not shown) at which the electrical wires 157 terminate and to which wires from the electrical s source are connected simply by inserting the ends of the wire into socket holes 158. Additional sockets may be formed for feeding the electricity to the adjacently installed receptacle 30. The cable 37 extending from the jack 32 terminates in a socket 150 formed in the cover 33 for connection to a cable routed in the premises. The cable 20 defines the transmission channel 20 either alone or in combination with the wire leading to the contacts 156. A cap 159 is fitted over the cover 33.
The receptacle 30 is provided with a pair of mounting brackets 160 for mounting the receptacle 30 easily to a mounting surface of a ceiling, 25 wall or floor of the premises. The bracket 160 is provides as a generally M-shaped metal member having a slot 161 extending over a 21~9740 center bent. The bracket 160 is pivotally supported at one end to the cover 33 so that it is capable of spreading out. A spring 162 is provided to extend between the longitudinal center of the bracket 160 and a portion of the cover adjacent the pivot end of the bracket so as to hold s the bracket in the closed position. The receptacle 30 is installed to the mounting surface simply by placing the upper portion of the receptacle into a mount hole (not shown) in the surface and by tightening screws 163 which extends through the periphery of the base 31 and through the slots 161 in the bracket in threaded engagement with nuts 164. As the lO screws 163 are tightened, the nuts 164 moves along the length of the bracket so as to spread out the brackets 160 behind the mounting surface against the bias of the spring 162, thereby grasping the periphery of the mount hole between thus expanded brackets and the rim portion of the base 31. The brackets 160 are normally held closed 15 by the springs 162 so as to be readily guided into the mount hole.
FIG. 17 shows the structure of the LAN unit 41, which is substantially identical to the other units 42 to 44. The unit 41 has a housing comprising a top-opened barrel 171 and a cover plate 172 secured thereto by screws 173 and carrying the prongs 174.
20 Accommodated within the barrel 171 is a first printed board 175 carrying the plugs 176 for connection into the jack 32 of the receptacle 30 and a second printed board 177 forming thereon a necessary electronic circuit. A flat cable 178 is provided for electrical connection between the printed boards 175 and 177 which are secured to the barrel 25 171 by screws 173 and 179. Secured to the bottom of the barrel 171 is an antenna module 180 incorporating the antennas 81 and 82 and ~1~9~Q
connected to the circuit on the printed board 177 though a cable 181.
- 21~974~
LIST OF REFERENCE NUMERALS
data terminal 50 interface 2 personal handy phone 51 antenna 2a telephone 52 ~nt~nn~
3 remote controller 53 two-way switch 4 lighting equipment 54 switch receiving circuit exchange box 56 transmitting circuit 11 hub 57 wireless controller 12 PBX 58 protocol converter 13 gateway 59 coder tr~n.~mi~sion ch3nnel 60 modulator 21 extension line 61 reference oscillator 22 wire 62 first oscillator 23-- central office line 63 second oscillator cable 64 demodulator 26 two-wire line 65 decoder 66 data buffer receptacle 31 base 70 wire controller 31a stopper 71 coder 32 jack 72 decoder 32a flange 73 transceiver 33 cover 34 screw 81 ~ntenn~
opening 82 ~nt~.nn~
36 inner flange 83 two-way switch 37 cable 84 switch 38 jack cover 85 receiving circuit 39 projection 86 tr~n~m~ n~ circuit 87 wireless controller 41 LAN unit 88 protocol converter 42 phone unit 89 coder 43 remote controller unit 44 detector unit 90 modulator camera unit 91 reference oscillator 46 television camera 92 first oscillator 93 second oscillator 94 demodulator decoder 96 data buffer 2 14 9 74 ~
UST OF REFERENCE NUMERALS
101 interface 157 electrical wire 102 interface 158 socket 103 interface lS9 cap 104 switch circuit lOS control circuit 160 bracket 106 interface 161 slot 162 spring 111 microphone 163 screw 112 speaker 164 nut 113 speech network 114 channel codec 171 barrel llS modem 172 coverplate 116 frequency converter 173 screw 117 ~ntP~nn~ 174 prong 1 ~8 PLL circuit 175 printed board 119 control circuit 176 plug 177 printed board 123 speech network 178 flat cable 124 channel codec 179 screw 125 modem 126 frequency converter 180 ~nt~nn~ module 127 ~n~nn~ 181 cable 128 PLL circuit 129 control circuit 131 masterdevice 132 console device 140 supervisor 141 interface 142 controller 143 memory 144 input section 145 display 150 socket l S l retainer plate 152 screw 153 hole 154 coil spring lSS slot 156 contact
FIG. 16 is an exploded perspective view of the receptacle; and FIG 17 is an exploded perspective view of the local transmitter-5 reCelVer.
DETAILED DESCRIPTION OF THE EMBODIMENT
Referring now to FIG. 1, there is shown an intra-premises communication system in accordance with a preferred embodiment of the present invention. The system comprises an exchange box 10 and a l0 plur~lity of receptacles 20 connected to the exchange box 10 by way of individual wired transmission channels 20. Also connected to the exchange box 10 are different interfaces composed of a hub 11 for an LAN (local area network), a PBX (private branch exchange) 12, and a gateway 13 for a building automation network or a load m~n~gement 15 network carrying one or more load such as a lighting equipment. The exchange box 10, the transmission channels 20 and the receptacles 30 are preinstalled in the wall, ceiling, or floor of the premises. The receptacles 30 are provided with individual connectors of the identical configuration to which a variety of local transmitter-receivers are 20 selectively and detachably mounted for wiring connection to the transmission channel 20. The local transmitter-receivers 40 include a LAN unit 41 for wireless communication with data termin~l.s 4, a phone unit 42 for wireless communication with personal handy phone termin~ls 2, a remote controller unit 43 for wireless communication 25 with remote control termin~ls 3, a detector unit 44 and a camera unit 45 with a television camera 46.
_ -8- 214974Q
The transmission channel 20 may be a twist pair wire, coaxial cable, or optical fiber. When the optical fiber is utilized, the receptacle 30 is provided with a converter for conversion electrical signal into optical signal and vice versa.
The exchange box 10 comprises a patch panel (not shown) as a switch mechanism for connecting the interfaces 11 to 13 to selected ones of the transmission channels 20, i.e., the receptacles 30 by switching patch cords.
For constructing the LAN network, a personal computer having a - lO mod-em unit is utilized as the data termin~l 1. As shown in Fig. 2, the modem unit comprises an interface 50 which conform to PCMCIA
regulation for connection with the computer. The modem unit is provided with a pair of antennas 51 and 52 for wireless communication with the LAN unit 41. The antenna 51 is connected through a two-way switch 53 to a receiving circuit 55, while the antenna 52 is connected through the two-way switch to the receiver 55 as well as through a switch 54 to a transmitting circuit 56. Thus, the receiving circuit 55 can use either of the antennas 51 and 52 to effect diversity signal reception.
A wireless controller 57 is provided to effect the switching between the signal tr~n.~mi.~sion and reception as well as the switching between the antennas 51 and 52 in diversity signal reception. Further, the wireless controller 57 is responsible for controlling the other associated function of the modem unit such as for determining the timin~ of data transmission and reception. The computer delivers signals prescribed by a wired LAN protocol to the interface 50. A protocol converter 58 is connected to the interface 50 for making protocol conve-rsion between _ 9 2~974~
the wired LAN and the wireless LAN. Data to be transmitted from the data terminal 1 is fed through the wireless controller 57 to a coder 59 where it is encoded for data compression or the like. Thus encoded digital signal is then modulated at a modulator 60 and is further 5 converted into a high frequency signal at the transmitting circuit 56. A
reference oscillator 61 is provided to generate a clock signal utilized in the wireless controller 57. Based upon the clock signal a high frequency signal is generated for signal mixing at the transmitting circuit 56. For this purpose, a first oscillator 62 generates a high - lo freq~lency signal in synchronism with the clock signal from the reference oscillator 61, which high frequency signal is then mixed at the transmitting circuit 56 with an output of the modulator 60 for effecting frequency conversion of the output of the modulator 60. A second oscillator 63 is provided to generate a high frequency signal in s synchronism with the clock signal of the reference oscillator 60 in order to use the high frequency signal as a carrier. Modulation at the -modulator 60 may be made in accordance with FSK, PSK, QAM or the like method. At the receiving circuit 55 the reception signal is mixed with the high frequency signal from the first oscillator 62 to be 20 converted into a low frequency signal which is subsequently demodulated at a demodulator 64 into a digital signal by the use of the high frequency signal from the second oscillator 63. The digital signal is further decoded at a decoder 65 followed by being fed through the wireless controller 57 to the protocol converter 58 where it is converted 25 to a data conformed with the wired LAN protocol. A data buffer 66 is coupled to the protocol converter 58 for temporarily storing data during 214974~
the protocol conversion in order to avoid data loss which might otherwise occur due to the difference in data transfer speed between the wired LAN and the wireless LAN. The modem unit can be provided as a card to be inserted into the slot of an IC card drive of the computer or 5 as a board to be mounted in an expansion bus slot of the computer.
As shown in FIG. 3, the LAN unit 41 has the like circuit configuration as the modem unit except that a wire controller 70, a coder 71, a decoder 72, and a transceiver 73 are provided instead of the interface 50 utilized in the modem unit for connection with the wired - lO LAN through the transmission channel 20. The transceiver 73 acts as an interface with the wired LAN and is controlled by the wire controller 70 to switch the data delivery to and from the wired LAN at a suitable timing. The coder 71 and decoder 72 are provided between the transceiver 73 and the protocol converter 88 for data delivery to and lS from the wired LAN. The LAN unit includes the elements which are identical in function to those utilized in the modem. The elements are antennas 81 and 82, switches 83 and 84, receiving circuit 85, transmitting circuit 86, wireless controller 87, coder 89, modulator 90, reference oscillator 91, first oscillator 92, second oscillator 93, 20 demodulator 94, and decoder 95.
The wireless controller 57 and 87 operate differently according to a condition whether all of the data termin~l~ 1 are within an accessible region to the associated LAN unit 41 for wireless communication therebetween or anyone of the data termin~l~ 1 is connected to the wired 25 LAN. As shown in FIGS. 4A to 4C, there are three types of formats for the signal transmitted between the LAN unit and the modem unit of the 1l 21d9740 -data terminal 1, i.e., for the input signal to the modulators 60 and 90, and output signal from the demodulators 64 and 94. The format of FIG.
4A is for the signal polling the data termin~ 1 by the LAN unit 41 is composed of a preamble PA making synchronization to a destination, a 5 type TP identifying the polling, an address SA designating the destination address, and a check code CH. The polling is made regularly to the data termin~l~ 1 located within the accessible region by successively ch~nging the addresses. The data terminal 1 issues the signal in the format of FIG. 4B when the address carried on the radio - lo signal from the LAN unit 41 coincide with the own address. The signal is composed of a preamble PA, a type TP identifying the data transmission and specifying data size, tr~n~mi.~sion data DT, and a check code CH. The tr~n.cmi~sion data DT is a data in accordance with the protocol of the wired LAN and, as shown in FIGS. 4D, is composed 15 of a source address AT, a destination address AS, a data size SZ, a transmission data DD, and a check code CC for the wired LAN which utilizes the signal of the format having a preamble PP prefixed to the transmission data DT. Upon receiving the radio signal of the format of FIG. 4B, the LAN unit 41 issues to the data terminal 1 a confirmation 20 radio signal having the format of FIG. 4C composed of a preamble PA, - a type TP identifying the confirmation, and a check code CH, whereby the data terminal 1 confirms that the communication is normal.
When the data termin~l~ (A) constructing the wireless LAN is to transfer data through the hub 11 to other data termin~l~ B constructing a 25 wired LAN, a procedure is made in accordance with the flowchart of FIG. 5. Firstly, data terminal (A) converts transmission data at protocol 21~97~
converter 58 into corresponding data of the format of ~IG. 4B including the destination address [S1]. When this terminal (A) receives the signal in the format of FIG. 4B from LAN unit 41B and the destination address in the signal is coincident with the own address [S2], the terminal (A) 5 transmits the data prepared in step [S1] as a wireless signal [S3]. Upon receiving the wireless signal from the terminal (A) [S4], the LAN unit 41 responds to check whether the tr~n~mi~sion is normal or not. When not normal lS5], the LAN UIlit 41 waits to receive the data from the terminal (A) for a predetermined interval without making the polling lO and=stops signal processing [S6] if normal data tr~n~mi~sion is made in that interval. When the data tr~n~mi~sion is normal, the LAN unit 41 returns "ACK" signal in the format of FIG. 4C to the terminal (A3 [S7].
Upon receiving "ACK" signal [S8], the terminal (A) proceeds to the next step, otherwise continue to re-transmit the data only for a 15 prescribed number of times until receiving "ACK" signal from the LAN
unit. In response to the normal data tr~n~mi~sion acknowledge, the LAN unit 41 derives data DT at the protocol converter 88 and appends the preamble PP to data DT to give a corresponding data signal for wired communication [S9]. Then, the LAN unit 41 transmits data DD
20 by "CSMAICD" method to the data terminal (B) having an address coincident with the destination address AS [S10]. Thus, the terminal (B) constructing the wired LAN can receive data DD from the terminal (A) of the wireless LAN [S11]. The terminal (B) may be a server. The hub 11 may be utilized for intercommunication among a plurality of 25 networks.
Now, explanat;on is made to a telephone system utili7in~ the 2~9740 personal phone terminals 2. As shown in FIG. 6, the telephone system comprises the PBX 12 having extension lines 21 leading the exchange boxes 10 from which the transmission channels 20 extend to the receptacles 30, respectively for connection to the phone units 42, which 5 in turn establish wireless communication with the phone termin~l~ 2. A
conventional telephone 2a may be connected through a wire 22 to the exchange box for wire connection with the PBX 12. The phone unit 42 is connected through the exchange box 10 to an interface 101 in the PBX 12, while the telephone 2a is connected through the exchange box o 10 to an interface 102 in the PBX 12. The interface 101 is designed for wireless telecommunication made between the phone termin~l~ 2 and PBX, while the interface 102 is for wired telecommunication between the conventional telephone 2a and PBX. The PBX 12 includes another interface 103 for connection with the central office line 23. A switch 15 circuit 104 is provided in PBX to connect and disconnect the interfaces 101 and 102 to and from the interface 103 under the control of a control circuit 105 for enabling public telecommunication and private telecommunication between the phone termin~l~ 2 and the telephones 2a.
Also included in the PBX 12 is another interface 106 for connection 20 with other networks, for example, the LAN and the load m~n~ement network in order to transfer through the central office line 23 the data handled by the data termin~l~ 1 and to control the load from the phone termin~ls 2 and the telephone 2a.
As shown in FIG. 7, the phone terminal 2 comprises a microphone 25 111 and a speaker 112 connected to a channel codec (coder-decoder) 114 through a speech network 113 including an antiside tone circuit.
21~9~ 4Q
Audio data encoded in the channel codec 114 is modulated at a modem 115 and is subsequently converted at a frequency converter 116 into a high frequency signal to be transmitted through an antenna 117. A high frequency signal received at the antenna 117 is frequency converted at 5 the converter 116 and is subsequently demodulated at the modem 115 so as to be decoded at the channel codec 114 and fed to the speaker 112.
The modem 11S and the frequency converter 116 are controlled by a PLL circuit 118 to operate synchronously. A control circuit 119 made of a microprocessor is provided to control the operation of the above - lO elements.
As shown in FIG. 8, the phone unit 42 has the like configuration as the phone terminal 2 except that a data tr~n.~mi.~sion circuit 123 provided instead of the speech network 113 for transmitting and receiving audio signal to and from the PBX 12 through a channel coded lS 124. Therefore, the phone unit 42 is composed of the channel codec 124, modem 125, frequency converter 126, antenna 127, PLL circuit 128, and control circuit 129 all of the same function as those in the phone terminal-2.
The phone unit 42 gives wireless signal for communication with 20 the phone terminal 2 which signal has a protocol in conformity with RCR ST D-28 and is capable of simultaneous communication with up to four phone termin~l~. That is, the phone unit 42 transmits data composed of four frames Fl, as shown in FIG. 9A, sequentially to the four phone termin~l~ 2 by TDMA technique, and thereafter receive data 25 composed of four frames F2 sequentially from the four phone terminals 2. The frames Fl and F2 are provided to give either of a control slot or communication slot of a fixed length. The control slot comprises, as shown in FIG. 9B, a ramp time R(4) for transient response, start symbol SS(2), control signal CAC (62), synchronization word UW(32), control signal CAC(108), error detection code CRC(16). Numerals in 5 parenthesis represent bit numbers. The communication slot comprises, as shown FIG. 9C, a ramp time R(4), start symbol SS(2), permeable PR(6), synchronization word UW(16), information I(180) such as digitized voice, and error detection code CRC(16).
The wired communication between the phone unit 42 and the PBX
o 12 is made by transferring signal of digital data, as shown in FIG. 10A
to 10C. The digital PBX 12 transmits to the phone unit 42 data within a frame FR1 which alternates with a frame FR2 within which the PBX
receives data from the phone unit, as shown in FIG. 10A. These frames FR1 and FR2 has a format capable of transferring plurals words each 15 composed of 36 bits. The format is, as shown in FIG. 10B, composed of word number WD(8), data CL(8) indicating start and stop of digital transfer, data WVV, and parity PT(1). The data WW is a 36-bits signal which is, as shown in FIG. 10C, composed of four sets of 8-bits data B
to B4 of actual information to be transferred plus 1-bit control data D
20 to D4, each set provided for each of the four phone termin~l~ 2.
Communication sequence between the PBX 12 and the phone unit 42 is shown in FIG. 11. When the phone terminal 2 is called, the PBX
12 designates one of the phone unit 42 associated with the called terminal and delivers the incoming to thus designated phone unit 42, 25 which in turn gives a rin~in~ to the called phone terminal 2. Then, the phone terminal 2 responds to return a demand of link establishment to 21497~0 the phone unit 42, after which the phone unit 42 assigns a link channel to the phone terminal 2. Upon receiving an ringing response from the phone terminal 2, the phone unit 42 gives a call setting to the terminal 2 which in turn acknowledges of the call setting. Thereafter, the terminal 5 2 issues a call and answer signal to the phone unit 42. Upon this occurrence, the phone unit 42 delivers the answer signal to the PBX 12 and at the same time delivers an answer confirmation to the phone termin~ 2. Thus, the communicat;on link is made between the PBX 12 and the phone terminal 2 for telecommunication therebetween.
lO - The load management system will be explained with reference to FIG. 12. The system includes the gateway 13 in the form of a time division multiplexing controller, the remote controller unit 43, and the detector unit 44, which units are mounted to the receptacles 30. The gateway 13 comprises a master device 131 and a plurality of console 15 devices 132 provided with relays for controlling to turn on and off the loads, for example, lighting equipment~ 4 which are connected through a cable 25 to the console devices 132. The console device 132 is connected in a multi-drop manner to the master device 131 through a two-wire line 26 and is further wired to the exchange box 10. The 20 remote controller unit 43 and the detector unit 44 are thus connected to the console devices 132 through the exchange box 10 for giving a control signal thereto. The detector device 44 includes a human detector which gives an output indicating that a human comes within a detection area covered by the detector unit 44 for notifying the presence 2s of the human in the region. The master device 131 gives an access to the console devices 132 cyclically by designating individual addresses 2i49740 given to the console devices 132 for checking the control signal fed from the units 43 and 44 and for controlling to turn on and off the lighting equipment 4 associated with the console devices being accessed.
For example, when the remote controller 3 gives a light remote signal to 5 turn on the particular lighting equipment 4, the remote controller unit 43 responds to transmit the corresponding control signal to the master device 131 when accessed by the master device 131. Then, the master device 131 instructs the termin~l device 132 associated with the particular lighting equipment 4 for turning on the equipment 4. The lO detector unit 44 is likewise connected to the console unit 132 to give the - control signal when the human comes within the detection area such that the master unit 131 instructs the console unit 132 to turn on the associated lighting equipment.
In order to supervise the operations of the above systems, a 15 supervisor 140 is connected to the hub 11. The supervisor may be an independent device or configured as a part of a server for the wired LAN, and comprises, as shown in FIG. 13, an interface 141 for data transfer with the wired LAN, a controller 142 made of a microprocessor, a memory 143, an input section 144 for entry the setting of the 20 receptacles 30, and a display 145 for notifying the status of the receptacles 30 and the types of units mounted thereto in a manner as shown in FIG. 14, wherein A, B, C in the location column indicate a section within the premises and 1, 2, 3 indicate a division in the section.
For example, A-1 in the location column means that the receptacle is 25 located at a division 1 of an section A. In FIG. 14, PHP and LAN-RPT
in the unit type column represent the phone unit 42 and the LAN unit 41, ~149~4 respectively.
Referring to FIGS.15 and 16, explanation is made to the structure of the receptacle 30 having the connector common to the above described units 41 to 44. The receptacle 30 comprises a disc base 31 5 carrying the connector 32 in the form of a modular jack and a cover 33 assembled to the base 31 by means of screws 34. The base 31 has a center opening 35 with an inner flange 36 projecting inwardly from the lower circumference of the opening to support the jack 32 so that the jack 32 is rotatably received in the opening. The jack 32 is provided in lO its lower end with a shutter (not shown) and with a plurality of terminal lugs exposed in the upper end for connection with a cable 37. A jack cover 38 is hooked to the upper end of the jack 32 to conceal connection of the cable 37 and the jack. The jack 32 is held on the base 31 together with the jack cover 38 by means of a retainer plate 151 secured to the 15 base by screws 152, whereby the jack 32 is held between the retainer plate 151 and the inner flange 36. The retainer plate 151 has a center hole 153 into which a rounded projection 39 on the jack cover 38 fits for allowing the jack 36 to rotate about a vertical axis together with the jack cover 38. A coil spring 154 fits loosely around the jack 32 20 between the retainer plate 151 and a flange 32a at the lower end of the jack 3. The upper end of the coil spring 154 is engaged to the jack 32 and the lower end of the coil spring 154 is engaged to a stopper 31a formed on the base 31 adjacent the center opening 35 such that as the jack 32 rotates relative to the base 31 the spring 154 is wound to 25 thereby accumulate a bias of returning the jack. The base 31 is formed with a pair of arcuate slots 155 which are diametrically opposed about the center opening 35 to receive a pair of prongs 174 projecting from each of the units 41 to 44. Secured to the base 31 adjacent the slots 155 are contacts 156 which are connected to electrical wires 157 and which comes into electrical contact with the prongs 174 when the unit is 5 mounted to the receptacle 30 for supplying voltage to the unit. Each of the units 41 to 44 is configured to have, in addition to the prongs, a plug 176 which is inserted to the jack 32 for signal correspondence therebetween. Mounting of the unit to the receptacle 30 is made by inserting the prongs 174 into the slots 155 and subsequently rotating to o some angle, after which the prongs 174 comes into firm engagement with the ends of the slots 155 while the jack 32 rotates correspondingly - to wind the coil spring 154. The cover 33 fitted over the jack 32 to the base 31 is formed with quick connection sockets (not shown) at which the electrical wires 157 terminate and to which wires from the electrical s source are connected simply by inserting the ends of the wire into socket holes 158. Additional sockets may be formed for feeding the electricity to the adjacently installed receptacle 30. The cable 37 extending from the jack 32 terminates in a socket 150 formed in the cover 33 for connection to a cable routed in the premises. The cable 20 defines the transmission channel 20 either alone or in combination with the wire leading to the contacts 156. A cap 159 is fitted over the cover 33.
The receptacle 30 is provided with a pair of mounting brackets 160 for mounting the receptacle 30 easily to a mounting surface of a ceiling, 25 wall or floor of the premises. The bracket 160 is provides as a generally M-shaped metal member having a slot 161 extending over a 21~9740 center bent. The bracket 160 is pivotally supported at one end to the cover 33 so that it is capable of spreading out. A spring 162 is provided to extend between the longitudinal center of the bracket 160 and a portion of the cover adjacent the pivot end of the bracket so as to hold s the bracket in the closed position. The receptacle 30 is installed to the mounting surface simply by placing the upper portion of the receptacle into a mount hole (not shown) in the surface and by tightening screws 163 which extends through the periphery of the base 31 and through the slots 161 in the bracket in threaded engagement with nuts 164. As the lO screws 163 are tightened, the nuts 164 moves along the length of the bracket so as to spread out the brackets 160 behind the mounting surface against the bias of the spring 162, thereby grasping the periphery of the mount hole between thus expanded brackets and the rim portion of the base 31. The brackets 160 are normally held closed 15 by the springs 162 so as to be readily guided into the mount hole.
FIG. 17 shows the structure of the LAN unit 41, which is substantially identical to the other units 42 to 44. The unit 41 has a housing comprising a top-opened barrel 171 and a cover plate 172 secured thereto by screws 173 and carrying the prongs 174.
20 Accommodated within the barrel 171 is a first printed board 175 carrying the plugs 176 for connection into the jack 32 of the receptacle 30 and a second printed board 177 forming thereon a necessary electronic circuit. A flat cable 178 is provided for electrical connection between the printed boards 175 and 177 which are secured to the barrel 25 171 by screws 173 and 179. Secured to the bottom of the barrel 171 is an antenna module 180 incorporating the antennas 81 and 82 and ~1~9~Q
connected to the circuit on the printed board 177 though a cable 181.
- 21~974~
LIST OF REFERENCE NUMERALS
data terminal 50 interface 2 personal handy phone 51 antenna 2a telephone 52 ~nt~nn~
3 remote controller 53 two-way switch 4 lighting equipment 54 switch receiving circuit exchange box 56 transmitting circuit 11 hub 57 wireless controller 12 PBX 58 protocol converter 13 gateway 59 coder tr~n.~mi~sion ch3nnel 60 modulator 21 extension line 61 reference oscillator 22 wire 62 first oscillator 23-- central office line 63 second oscillator cable 64 demodulator 26 two-wire line 65 decoder 66 data buffer receptacle 31 base 70 wire controller 31a stopper 71 coder 32 jack 72 decoder 32a flange 73 transceiver 33 cover 34 screw 81 ~ntenn~
opening 82 ~nt~.nn~
36 inner flange 83 two-way switch 37 cable 84 switch 38 jack cover 85 receiving circuit 39 projection 86 tr~n~m~ n~ circuit 87 wireless controller 41 LAN unit 88 protocol converter 42 phone unit 89 coder 43 remote controller unit 44 detector unit 90 modulator camera unit 91 reference oscillator 46 television camera 92 first oscillator 93 second oscillator 94 demodulator decoder 96 data buffer 2 14 9 74 ~
UST OF REFERENCE NUMERALS
101 interface 157 electrical wire 102 interface 158 socket 103 interface lS9 cap 104 switch circuit lOS control circuit 160 bracket 106 interface 161 slot 162 spring 111 microphone 163 screw 112 speaker 164 nut 113 speech network 114 channel codec 171 barrel llS modem 172 coverplate 116 frequency converter 173 screw 117 ~ntP~nn~ 174 prong 1 ~8 PLL circuit 175 printed board 119 control circuit 176 plug 177 printed board 123 speech network 178 flat cable 124 channel codec 179 screw 125 modem 126 frequency converter 180 ~nt~nn~ module 127 ~n~nn~ 181 cable 128 PLL circuit 129 control circuit 131 masterdevice 132 console device 140 supervisor 141 interface 142 controller 143 memory 144 input section 145 display 150 socket l S l retainer plate 152 screw 153 hole 154 coil spring lSS slot 156 contact
Claims (8)
1. An intra-premises communication system comprising:
an exchange box mounted in a premises and having different interfaces for connection to different networks;
a plurality of wired transmission channels routed in the premises extending from said exchange box and terminating at receptacles installed in said premises, said receptacles having a common connector;
a plurality of indoor wireless terminals of different types; and a plurality of local transmitter-receivers of different types, each detachably and selectively mounted to said common connector for communication with one of said different networks through an associated wired transmission channel, each of said local transmitter-receivers having means for wireless communication with at least one of said wireless terminals and having conversion means for converting between information carried by way of one of said transmission channels and the information carried by way of said wireless communication;
said exchange box having switch means for selectively connecting said wired transmission channels to particular ones of said interfaces in order to allocate the local transmitter-receivers to the different networks.
an exchange box mounted in a premises and having different interfaces for connection to different networks;
a plurality of wired transmission channels routed in the premises extending from said exchange box and terminating at receptacles installed in said premises, said receptacles having a common connector;
a plurality of indoor wireless terminals of different types; and a plurality of local transmitter-receivers of different types, each detachably and selectively mounted to said common connector for communication with one of said different networks through an associated wired transmission channel, each of said local transmitter-receivers having means for wireless communication with at least one of said wireless terminals and having conversion means for converting between information carried by way of one of said transmission channels and the information carried by way of said wireless communication;
said exchange box having switch means for selectively connecting said wired transmission channels to particular ones of said interfaces in order to allocate the local transmitter-receivers to the different networks.
2. An intra-premises communication system, comprising:
an exchange box mounted in a premises and having different interfaces for connection to different networks;
a plurality of wired transmission channels routed in the premises extending from said exchange box and terminating at receptacles installed in said premises, said receptacles having a common connector;
a plurality of indoor wireless terminals of different types; and a plurality of dedicated local transmitter-receivers of different types, each detachably and selectively mounted to said common connector for communication with one of said different networks through an associated wired transmission channel, each of said local transmitter-receivers having means for wireless communication with at least one of said wireless terminals and having conversion means for converting between information carried by way of one of said transmission channels and the information carried by way of said wireless communication;
said exchange box having switch means for selectively connecting said wired transmission channels to particular ones of said interfaces in order to allocate the local transmitter-receivers to the different networks.
an exchange box mounted in a premises and having different interfaces for connection to different networks;
a plurality of wired transmission channels routed in the premises extending from said exchange box and terminating at receptacles installed in said premises, said receptacles having a common connector;
a plurality of indoor wireless terminals of different types; and a plurality of dedicated local transmitter-receivers of different types, each detachably and selectively mounted to said common connector for communication with one of said different networks through an associated wired transmission channel, each of said local transmitter-receivers having means for wireless communication with at least one of said wireless terminals and having conversion means for converting between information carried by way of one of said transmission channels and the information carried by way of said wireless communication;
said exchange box having switch means for selectively connecting said wired transmission channels to particular ones of said interfaces in order to allocate the local transmitter-receivers to the different networks.
3. An intra-premises communication system as set forth in claim 1 or 2, wherein said wireless terminals include data terminals and wherein each of said local transmitter-receivers includes means which is cooperative with one of said interfaces to construct a local area network which enables data transmission among said data terminals.
4. An intra-premises communication system as set forth in claim 1, 2 or 3, wherein said wireless terminals include personal handy phone terminals and wherein each of said local transmitter-receivers includes means for intercommunication with said phone terminals, one of said interfaces comprising a private branch exchange (PBX) for connecting of said transmission channels to an outside network.
5. An intra-premises communication system as set forth in any one of claims 1 to 4, wherein said interfaces are arranged to enable intercommunication between said networks.
6. An intra-premises communication system as set forth in any one of claims 1 to 5, wherein each of said receptacles comprises a base plate carrying a pair of mounting brackets which are pivotally-supported at one end to said base plate, and a pair of screws each extending through a periphery of said base plate and through an intermediate portion of said brackets, said base plate having a circumference which abuts against a periphery of a mounting hole provided in a mounting surface of said premises with said brackets projecting through said mounting hole, said screws being in threaded engagement with said brackets in such a manner that tightening of screws causes said brackets to expand behind said mounting surface for gripping the periphery of said mounting hole between said brackets and said circumference of said base plate.
7. An intra-premises communication system as set forth in claim 6, wherein each of said receptacles has a pair of electrical contacts connected to a power source, said receptacles being formed with a pair of slots which engages with prongs projecting from said local transmitter-receiver, said electrical contacts being positioned adjacent said slots to be in electrical connection with said prongs for supplying an electric power to said local transmitter-receiver.
8. An intra-premises communication system as set forth in claim 6 or 7, wherein said common connector is in the form of a modular jack connected to one of said transmission channels, each said local transmitter-receiver having a plug detachable to said modular jack.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JPP06-107180 | 1994-05-20 | ||
| JP10718094A JP3192318B2 (en) | 1994-05-20 | 1994-05-20 | Wireless information transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2149740A1 CA2149740A1 (en) | 1995-11-21 |
| CA2149740C true CA2149740C (en) | 2000-06-20 |
Family
ID=14452503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002149740A Expired - Fee Related CA2149740C (en) | 1994-05-20 | 1995-05-18 | Intra-premises communication system |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5722076A (en) |
| EP (1) | EP0684714B1 (en) |
| JP (1) | JP3192318B2 (en) |
| CN (1) | CN1083222C (en) |
| CA (1) | CA2149740C (en) |
| DE (1) | DE69529588T2 (en) |
| TW (1) | TW304009U (en) |
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-
1994
- 1994-05-20 JP JP10718094A patent/JP3192318B2/en not_active Expired - Lifetime
-
1995
- 1995-05-17 TW TW085202151U patent/TW304009U/en unknown
- 1995-05-18 US US08/443,439 patent/US5722076A/en not_active Expired - Fee Related
- 1995-05-18 CA CA002149740A patent/CA2149740C/en not_active Expired - Fee Related
- 1995-05-19 CN CN95106203A patent/CN1083222C/en not_active Expired - Lifetime
- 1995-05-19 EP EP95107740A patent/EP0684714B1/en not_active Expired - Lifetime
- 1995-05-19 DE DE69529588T patent/DE69529588T2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0684714A2 (en) | 1995-11-29 |
| DE69529588T2 (en) | 2003-12-18 |
| EP0684714B1 (en) | 2003-02-12 |
| CN1113641A (en) | 1995-12-20 |
| JP3192318B2 (en) | 2001-07-23 |
| CN1083222C (en) | 2002-04-17 |
| US5722076A (en) | 1998-02-24 |
| CA2149740A1 (en) | 1995-11-21 |
| JPH07321797A (en) | 1995-12-08 |
| TW304009U (en) | 1997-04-21 |
| DE69529588D1 (en) | 2003-03-20 |
| EP0684714A3 (en) | 1997-06-25 |
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| EEER | Examination request | ||
| MKLA | Lapsed | ||
| MKLA | Lapsed |
Effective date: 20090519 |