WO2008025284A1

WO2008025284A1 - Method, device and system of transmitting wireless packet transaction data

Info

Publication number: WO2008025284A1
Application number: PCT/CN2007/070497
Authority: WO
Inventors: Zhongmin Deng; Liang Xu; Chuanfeng He; Zongjie Wang; Xiaoxiao Zheng
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-08-22
Filing date: 2007-08-16
Publication date: 2008-03-06

Abstract

A method and device of transmitting wireless packet transaction data are provided. The method includes: at a discontinuous transmission state, when there is no uplink data transmission in a predetermined period, the timing beginning transmitting satisfies the pattern of predetermined period if the terminal needs to restart transmitting the uplink data. A method of processing terminal in uplink discontinuous transmission is also provided and includes: during the terminal executing discontinuous transmission in a long period which acts as the period, if the terminal needs to transmit uplink data, according to media accessing control period which is setup, the base station is noticed that uplink data need to be transmitted. According to the solution, under the receipt of a long period gating, detecting periodically preamble and packet data of the channel enables the base station realize DRX in the DTX long period without continuously receiving by the base station, so that it can save the receiver resource of the base station greatly. Detecting uplink/downlink packet data quantity, and selecting an appropriate reception mode according to size of packet data quantity, will save the receiver resource, and improve the performance and efficiency of system.

Description

Method, device and system for transmitting wireless packet service data The application claims to be submitted to the Chinese Patent Office on August 22, 2006 and November 08, 2006, and the application numbers are 200610111489.5, 200610138244.1, respectively, and the invention names are respectively The priority of the method and apparatus for data reception and the processing method of the uplink discontinuous transmission, the terminal, the base station and the system, the entire contents of which are incorporated herein by reference. Technical field

The present invention relates to the field of mobile communication technologies, and in particular, to a method, device and system for transmitting wireless packet service data. Background technique

At present, the development of wireless communication packet services is very rapid, and its service feature is the bursting of data transmission, that is, packet data is intermittently transmitted. In a business process, the number of data interruptions can be very large. For example, web browsing services are generally performed by downloading web pages (with data transmission) and browsing web pages (without data transmission). Still others require long periods of sporadic data transfer. If the same connection state is maintained regardless of the data transmission, that is, when the data is not transmitted, the same resource is allocated, which is a waste and limits the number of simultaneous online users; if the data transmission is started at the beginning Connections, releasing connections when data transmission is stopped, will result in frequent establishment and release of connections, increase system control load, and increase data transmission delay, which is unsatisfactory for certain real-time requirements.

In order to provide the number of online users of packet services, the concept of "Continuous connectivity for packet data users" is proposed. "Permanent online" requires the use of specific technologies for user equipment (UE, User Equipment) and universal terrestrial radio access networks. (UTRAN, Universal Terrestrial Radio Access Network) can maintain the cell-connected state (CELL-DCH, Cell-Dedicated Channel) for a long time during the inactive period without data transmission, and at the same time reduce the resources that consume air. This inactive state of no data transmission can be referred to as the Continuous Packet Connectivity ( CPC) state.

In the existing Wideband Code Division Multiple Access (WCDMA) system, the current increase in the number of online users is mainly through the F-DPCH (F-DPCH, Fractional Dedicated Physical Channel) and the uplink dedicated physical control. Channel (DPCCH, Dedicated Physical Control Channel) periodic gating technology. See picture

1 . The shaded part is the transmitted data frame. In the active state of the uplink and downlink, the data frame is continuously transmitted, and the periodic gating is used in the inactive state of the uplink and the downlink. The periodic gating is the CPC state during the uplink and downlink data transmission idle period, stopping the continuous transmission of the uplink DPCCH and the downlink F-DPCH, and transmitting the uplink DPCCH and the downlink F-DPCH only in a partial subframe with a certain period of interval to maintain power control and hold. Synchronize. The periodic gating is divided into long-period gating and short-period gating. For long-period gating, the interval at which the UE transmits the uplink DPCCH sub-frame is longer. Therefore, a protection window needs to be added to the receiving window of the UE at the node (Node B) to ensure synchronization. For example, for a UE moving at 350 km/h, if the length of the protection window set by the Node B is 10 For the chip, the interval of transmitting the subframe of the uplink DPCCH can be extended to 4 seconds without losing synchronization. In the short-cycle gating, the interval of transmitting the uplink DPCCH subframe is several tens of milliseconds, and the protection window mechanism is not required. Before sending several subframes in the period of the uplink DPCCH and the downlink F-DPCH, the preamble of several time slots needs to be sent to perform power control so that the corresponding subframe can be transmitted with appropriate power.

The main factor limiting the number of simultaneous online users is uplink interference. In the existing Wideband Code Division Multiple Access (WCDMA) protocol, when the UE is in the connected state, the uplink dedicated physical control channel DPCCH will transmit power control, with or without data transmission. Control information such as pilot signals, in this way, will cause uplink interference to other users, so that the number of users in the connected state is limited. Therefore, the existing solution mainly increases the number of concurrent users by reducing the uplink interference.

At present, the gating scheme is used to reduce the uplink interference, that is, the continuous transmission of the uplink DPCCH and the downlink fragment dedicated physical channel F-DPCH is stopped during the period of low uplink data transmission, discontinuous data transmission or idle data transmission. The uplink DPCCH and the downlink F-DPCH are transmitted only on a part of the subframes with a certain interval to maintain the power control and keep the UE and the UTRAN synchronized. At this time, both the uplink and the downlink are in discontinuous transmission (DTX). The state, called the continuous packet connection CPC state. During the connection establishment or reconfiguration process, the Radio Network Controller (RNC) determines that the UE supports the CPC mode and configures the relevant CPC parameters. The CPC parameters mainly include two DTX cycles, and the used preamble (preamble). The length and so on.

After the UE establishes a packet connection with the UTRAN, the UTRAN learns the uplink data amount by using the uplink data buffer status carried in the scheduling information of the UE, and passes the UTRAN side. The data queue status of the UE learns the amount of downlink data. When the amount of uplink and downlink data is low, the discontinuous data transmission or the data transmission is idle for a period of time, the UTRAN starts a timer. When the timer expires, the packet connection between the UE and the UTRAN enters the CPC state, starting from a certain radio frame. The UE performs DTX of the uplink DPCCH with periodic interval in UE-DTX cycle 1 (UE_DTX_cycle-1). As shown in FIG. 1, in the DPCCH transmission pattern of the UE-DTX cycle 1, each UE-DTX cycle The length of the subframe transmitted on 1 is UE-DPCCH burst 1 (UE_DPCCH_burst-1). The transmission patterns of multiple UEs are distributed on different subframes of the radio frame by setting different UE-DTX-Discontinuous Receiving (DRX) offsets (UE DTX DRX offset). The uplink DPCCH performs DTX during the period of the UE-DTX cycle 1, if the Enhanced Dedicated Physical Channel (E-DCH) has no E-DCH transmission in the set number of subframes since the last transmission, Then, the uplink DPCCH performs the DTX of the periodic interval with the UE-DTX cycle 2 (UE_DTX_cycle-2), and the set number is the static threshold of entering the UE-DTX cycle 2:

(Inactivity - Threshold - for - UE - DTX - cycle - 2 ),

In addition, during the DTX period of the uplink DPCCH, if there is a channel transmission other than the uplink DPCCH in a certain time slot, the uplink DPCCH needs to be transmitted in the time slot.

There are certain requirements for the preamble and postamble settings when there are other channel transmissions than the uplink DPCCH. During the DTX period of UE-DTX cycle 1, the UE may send a small amount of uplink data, and before and after the E-DCH transmission, the uplink DPCCH needs to transmit the preamble of 2 slots and the backstop of 1 slot respectively, if The high speed (HS)-DPCCH subframe is transmitted. Before and after the transmission, the uplink DPCCH needs to transmit the preamble of at least 2 slots and the back conductor of at least 1 slot respectively. During the DTX period of UE-DTX cycle 2, if the UE has uplink data to be transmitted, before the E-DCH transmission, the number of preamble slots that the uplink DPCCH needs to transmit first is UE-DTX long preamble length (UE_DTX- Long_preamble_length), and send the back-end of 1 slot after the E-DCH transmission; if the HS-DPCCH subframe is transmitted, if the UE has sufficient time, before and after the HS-DPCCH transmission, the uplink DPCCH respectively It is required to transmit a preamble of at least a UE-DTX long preamble length and a backend of at least one time slot. If the UE time is insufficient, the UE starts uplink DPCCH transmission as soon as possible, and transmits at least one time slot after the HS-DPCCH subframe transmission. The guide. If the parameter configured by the RNC is UE-DTX long preamble (UE_DTX_long_preamble) True (true) (parameter UE-DXT long preamble is a Boolean parameter, the value is true or false, configured by RNC), then the UE-DTX long preamble length is 15 time slots, if RNC is configured The UE-DTX long preamble is ^^ (false), and the UE-DTX long preamble length is 2 slots.

As shown in FIG. 2, the CPC parameters configured by the RNC are: UE—DTX—the DRX offset is 1 subframe, the UE-DTX period 1 is 4 subframes (frames), and the UE-DPCCH burst 1 is 1 subframe. UE-DTX period 2 is 8 subframes, UE-DPCCH burst 2 is 1 subframe, and the UE-DPCCH burst threshold is 4 subframes, UE-DPCCH burst preamble is true, UE DTX long preamble H

In the periodic gating scheme, the RNC can define the start time of the E-DCH transmission in the CPC state. As shown in FIG. 3, in the CPC state, the uplink DPCCH performs DTX during the UE-DTX cycle 1 period, and if there is no E-DCH transmission in the set number of subframes after the E-DCH has been transmitted since the last transmission, The number is the UE-inactivity-threshold value, and the UE static value is the parameter of the RNC configuration. When the E-DCH needs to be transmitted, the start time of the E-DCH transmission needs to be limited according to the uplink DPCCH transmission pattern. That is, when the uplink DPCCH starts transmission according to the transmission pattern, the E-DCH can start transmission, and the UE can perform E-DCH transmission by using a subframe in which the continuous subframe length does not exceed the UE static threshold after the transmission pattern. With this implementation, the base station unit (Node B) only needs to detect whether the UE has E-DCH transmission at the corresponding moment, and does not need to continuously receive the E-DCH transmission of the UE, thereby implementing the DRX of the Node B, thereby saving the Node B. Receiver resources.

In the CPC state, during the DTX during the uplink DPCCH with the UE-DTX cycle 1 as the cycle, the uplink DRX of the Node B is currently implemented by limiting the E-DCH transmission of the UE, but the longer UE-DTX cycle 2 is for the uplink DPCCH. During the period of DTX, there is no restriction on the E-DCH transmission of the UE. This requires the Node B to continuously receive the E-DCH transmission of the UE, regardless of whether the E-DCH is transmitting or not, to avoid missing the E-DCH transmission. The resources of the Node B receiver will be greatly wasted.

Regardless of whether long-term gating or short-period gating is used, in the CPC state, during the interval between the uplink DPCCH and the downlink F-DPCH transmission subframe, the receiver of the Node B (UE) continues to receive the channel, detecting the channel. The packet data from the UE (Node B ) wastes the resources of the receiver for the receiver. Summary of the invention

The present invention provides a method and apparatus for transmitting wireless packet service data, such that a base station implements discontinuous reception of DRX in a discontinuous transmission DTX long period, and in a CPC state, a Node B (UE) receiver continuously receives an uplink DPCCH (downstream) F-DPCH ), avoiding wasting receiver resources.

The present invention provides a method for transmitting wireless packet service data, including:

In the non-continuous transmission state, if there is no uplink data transmission within the preset time, if the terminal needs to restart the uplink data transmission, the time of starting the transmission meets the pattern of the preset period.

The invention also provides a data receiving method, comprising:

Periodically detecting preamble and packet data of the channel during long period gated reception of data; exiting the long period gating state and returning to the short cycle gating state to receive the packet data when the preamble and the packet data are detected .

A data receiving apparatus provided by the present invention includes:

a state adjustment unit, configured to adjust a receiving state of the current device;

a detecting unit, when the state adjusting unit adjusts the current device receiving state to long-period gate receiving, the detecting unit is configured to periodically detect the preamble and the packet data of the channel, and if the preamble and the packet data are detected, notify the state adjusting unit Adjusting the receiving state of the current device to a short cycle gating state;

The receiving unit is configured to receive the packet data in a corresponding receiving manner in a current receiving state of the device.

The method for processing a terminal in an uplink discontinuous transmission provided by the present invention includes: a terminal performing a DTX period with a discontinuous transmission DTX long period as a period, and when the terminal needs to perform uplink data transmission, controlling a MAC-DTX period according to the set media access control The base station is notified to transmit uplink data, and the uplink data is started to be sent according to the set MAC-DTX period.

The present invention provides a terminal for implementing uplink discontinuous transmission, including:

The clock control unit is configured to: when the terminal needs to transmit uplink data, according to the setting

The MAC-DTX cycle informs the notification unit to send an uplink data transmission notification, and according to the setting

The MAC-DTX cycle informs the data sending unit to send uplink data;

The notification unit is configured to send an uplink data transmission notification according to the notification information of the clock control unit;

The data sending unit is configured to start sending according to the notification information of the clock control unit Upstream data.

The present invention provides a base station that implements uplink discontinuous transmission, including:

The clock triggering unit is configured to notify the notification detecting unit to detect whether there is an uplink data transmission notification according to the set MAC-DTX period, and according to the feedback of the notification detecting unit, and according to the set MAC-DTX period notification The data receiving unit receives the uplink data; the notification detecting unit is configured to detect an uplink data transmission notification according to the notification from the clock triggering unit, and perform feedback to the clock triggering unit;

The data receiving unit is configured to start receiving uplink data according to the notification of the clock triggering unit.

The present invention provides a system for implementing uplink discontinuous transmission, where the system includes a terminal and a base station, and when the terminal needs to transmit uplink data, the terminal sends an uplink data transmission notification according to the set MAC-DTX cycle, and according to the set MAC— The DTX period starts to send uplink data; the base station detects whether there is an uplink data transmission notification according to the set MAC-DTX period, and after receiving the uplink data transmission notification, starts receiving uplink data according to the set MAC-DTX period.

In the technical solution provided by the embodiment of the present invention, during long-cycle gating reception, the preamble and packet data of the channel are periodically detected during the interval between the uplink DPCCH and the downlink F-DPCH transmission subframe; and the receiver is prevented from being in the uplink DPCCH. The signaling and service data on the channel are continuously received during the interval between the downlink F-DPCH transmission subframe, resulting in waste of resources of the receiver. When the channel is periodically detected, if the preamble and the packet data are detected, the long cycle gating state is exited and returned to the short cycle gating state to receive the packet data. The amount of packet data in the uplink and downlink is detected, and an appropriate receiving mode is selected according to the size of the packet data amount. The invention can save the resources of the receiver and greatly improve the performance and efficiency of the system.

In the technical solution provided by the embodiment of the present invention, when the UE performs DTX during the DTX long period, when the UE needs to perform uplink data transmission, the UE notifies the base station that the uplink data needs to be transmitted according to the set MAC-DTX period, and starts according to the set MAC-DTX period. The uplink data is sent. Correspondingly, after detecting the notification according to the set MAC-DTX period, the base station starts to receive the uplink data according to the MAC-DTX period without performing continuous reception by the base station, so that the base station implements DRX in the long cycle of DTX, which greatly saves Receiver resources of the base station.

The UE notifies the base station to initiate the transmission of the uplink data, which can be implemented by using a preamble. The length of the pilot can be set by the upper layer of the network according to the DTX long period, so the length of the preamble is flexible, instead of using the preamble length of a fixed number of slots, thus saving transmission resources of the network. DRAWINGS

Figure 1 is a schematic diagram of data transmission in an up and down active and inactive state;

2 is a schematic diagram showing an example of DTX and E-DCH transmission of an uplink DPCCH in a current CPC state;

3 is a schematic diagram showing an example of DTX and E-DCH transmission of an uplink DPCCH in an existing CPC state;

4 is a flow chart of a method in an embodiment of the present invention;

Figure 5 is a schematic diagram of data reception in a long period gated state;

Figure 6 is a schematic view of the apparatus in the embodiment of the present invention;

7 is a flowchart of a CPC state transition in an embodiment of the present invention;

8 is a schematic diagram of DTX and E-DCH transmission of an uplink DPCCH in a CPC state according to an embodiment of the present invention; FIG. 10 is a schematic structural diagram of a base station implementing uplink discontinuous transmission according to an embodiment of the present invention; Schematic diagram of a system for uplink discontinuous transmission. detailed description

An embodiment of applying the method of the present invention is described in detail below with reference to the accompanying drawings. Referring to FIG. 4, step S101: UTRAN establishes a packet service connection with the UE;

Step S102: The uplink DPCCH and the downlink F-DPCH are continuously transmitted, and the Node B and the UE continuously receive.

The UTRAN establishes a packet service connection with the UE, the UE maps the uplink DPCCH to the frame for continuous transmission, and the Node B continuously receives; the Node B maps the downlink F-DPCH to the frame for continuous transmission, and the UE continuously receives. The UTRAN learns the data size of the uplink and downlink and the current receiving state of the UE by using the buffer status of the UE uplink data carried in the scheduling information reported by the UE and the data queue status of the UE on the UTRAN side.

Step S103: Detect the amount of uplink and downlink packet service data, and judge the data transmission. If the UTRAN and the UE detect that the amount of uplink and downlink packet service data is lower than the threshold, or judge that there is no data transmission, step S204 is performed; otherwise, step S202 is performed.

Step S104: Entering the CPC state;

The UTRAN and UE are transferred to the CPC state.

Step S105: uplink DPCCH and downlink F-DPCH short-cycle gating transmission, Node B and

The UE receives in a short cycle mode.

The UE maps the uplink DPCCH to the short-term transmission in the frame, and the Node B receives the short-period; the Node B maps the downlink F-DPCH to the short-term transmission in the frame, and the UE receives the short-cycle. Under the short-cycle gating, between the UE and the UTRAN The amount of data transferred is low.

Step S106: Detect the amount of uplink and downlink packet service data, and determine the data transmission.

The UTRAN and the UE detect the amount of uplink and downlink packet service data and determine whether to exit the CPC state. If it is determined that the amount of service data increases, the CPC state is exited, and step S102 is performed; otherwise, step S107 is performed.

Step S107: detecting uplink and downlink packet service data transmission;

If the UTRAN and the UE detect the uplink and downlink packet-free service data transmission and determine that the time of the packet-free service data transmission has timed out, step S208 is performed; otherwise, step S205 is performed.

Step S108: The UE and the UTRAN enter a long-cycle gating state, and the uplink DPCCH and the downlink F-DPCH periodically transmit a preamble of several time slots and a plurality of corresponding subframes, and a periodic non-cyclical relationship starts between the Node B and the UE. Continuous reception;

In the long-cycle gating state, the DRX setting between the Node B and the UE is related to the service recovery delay requirement and the length of the preamble. If the preamble length is dms and the service recovery maximum delay is Lms, the Node B and the UE The maximum DRX can be set to Lms - d ms. Referring to Figure 5, at time A, the connection enters the long-cycle gating state, and the discontinuous reception is performed between the Node B and the UE. The Lms-d ms between the B and C moments is a DRX cycle. If the Node B or the UE initiates service recovery at any time, it needs to wait until the boundary C of the next DRX cycle to complete the detection of the preamble, thereby completing the service recovery. Currently, the service recovery delay required in the CPC state is less than 50ms, that is, L is less than 50ms.

Step S109: When there is a packet data transmission request in the uplink and downlink, the Node B detects the uplink DPCCH, or the UE detects the preamble and data of the downlink F-DPCH, and if it is determined that the preamble is detected, searches and acquires the multipath information, if it is determined If the data is detected, step S210 is performed, otherwise step S108 is performed. Step S110: Returning to the short cycle gating state, the multipath information is used to receive the detected data. For the foregoing embodiment, when the connection is in the CPC state and the long-period gated receiving, the UE (Node B) can determine whether the Node B (UE) initiates service recovery by periodically detecting the preamble and the data, and performs a corresponding periodic gate. Control state transitions. In the long-cycle gating state, since the multipath change of the channel is fast, when the service is resumed or the control channel subframe is periodically transmitted, if the multipath information before the gating interval is still used, the gating cycle needs to be relatively small. Otherwise, the multipath information after the long gate interval is unreliable, which will cause a sharp drop in receiver performance.

Therefore, after detecting the preamble, it is necessary to search for and acquire multipath information, and use the updated multipath information to perform operations such as demodulation, channel estimation, and power control. The slot format of the preamble can be the slot format of the corresponding downlink F-DPCH and the uplink DPCCH, and the Transmission Power Control (TPC) domain carries a predefined fixed sequence, which facilitates the detection of the preamble. The new multipath information obtained after re-searching is used to receive data, and the interval of long-period gating can reach the second level.

Referring to FIG. 6, the embodiment of the present invention further provides a data sending control apparatus, including: a state adjusting unit 210, configured to adjust a receiving state of the current device;

The detecting unit 220, when the state adjusting unit 210 adjusts the current device receiving state to the long-cycle gating receiving, the detecting unit 220 is configured to periodically detect the preamble and the packet data of the channel, and if the preamble and the packet data are detected, The notification state adjustment unit 210 adjusts the reception state of the current device to a short cycle gating state;

The receiving unit 240 is configured to receive the packet data in a corresponding receiving manner in a current receiving state of the device.

The apparatus provided by the embodiment of the present invention may further include:

The multipath information updating unit 230 is configured to search for and acquire multipath information after the detecting unit 220 detects the preamble.

In the apparatus of the present invention, the receiving unit 240 is configured to receive the packet data by using the multipath information acquired by the multipath information updating unit 230.

The detecting unit 220 is further configured to: when detecting that the amount of uplink and downlink channel packet data exceeds a predetermined threshold, the notification state adjusting unit 210 adjusts the current receiving state of the device to a continuous receiving state.

In the device of the present invention, the detecting unit 220 in the network side and the user equipment is further used for Notifying the status adjustment unit when detecting that the amount of uplink and downlink channel packet data is lower than a predetermined threshold

210 adjusts the receiving state of the current device to a short cycle gating state.

The device of the present invention is in the network side and the user equipment, and the detecting unit 220 in the network side and the user equipment is further configured to notify the state adjusting unit 210 to adjust when the time when no packet data transmission is detected on the uplink channel and the downlink channel is timed out. The receiving state of the current device is a long period gated state.

In the embodiment of the present invention, the UE performs DTX during the DTX long period, that is, the UE-DTX period T1, and the UE needs to perform uplink data transmission according to the set Media Access Control (MAC)-DTX period notification. The base station needs to transmit uplink data and start transmitting uplink data according to the set MAC-DTX cycle. Correspondingly, after detecting the notification according to the set MAC-DTX period, the base station starts receiving uplink data according to the MAC-DTX period.

The UE may notify the base station to transmit uplink data before reaching the MAC-DTX period boundary, and if the base station receives the notification before the MAC-DTX period boundary, it starts to receive the uplink data according to the MAC-DTX period.

FIG. 7 is a flowchart of a CPC state transition according to an embodiment of the present invention. As shown in FIG. 7, the process of performing CPC state transition includes the following steps:

Step S301: The UE establishes a packet service connection with the UTRAN.

Step S302: The uplink DPCCH is continuously sent, the UE continuously sends uplink data, and the Node B continuously receives the control information and the uplink data of the uplink DPCCH.

Step S303: Whether the UTRAN detects that the uplink data volume is low, the discontinuous transmission or the no data transmission timeout, and if yes, proceeds to step 304; otherwise, returns to step 302. Whether the UTRAN detects low uplink data, non-continuous transmission or no data transmission timeout may be: UTRAN detects that the uplink and downlink data volume is low, non-contiguous data transmission or data transmission idle timer starts, if recovery If the downlink data volume is transmitted, the timer is reset. Otherwise, when the timer expires, it indicates that the UTRAN detects low uplink data, non-continuous transmission or no data transmission timeout.

Step S304: The UE and the UTRAN enter a CPC state.

Step S305: The uplink DPCCH performs DTX in a DTX short period, that is, a UE-DTX period T2. In the DTX short period, the UE sends the uplink data discontinuously, and the Node B discontinuously receives the control information and the uplink data of the uplink DPCCH.

Step S306: Whether the UTRAN detects that the amount of uplink data increases, and needs to exit the CPC state. If yes, go back to step 302; otherwise, continue to step S307.

Step S307: Whether the UTRAN detects the uplink no data timeout, and if yes, proceeds to step S308; otherwise, returns to step S305. Whether the UTRAN detects the uplink no data timeout may be: The UTRAN starts the timer when no uplink data is detected, and resets the timer if there is uplink data transmission. Otherwise, when the timer expires, it indicates UTRAN detected an uplink no data timeout.

Step S308: The uplink DPCCH performs DTX in a period of a DTX long period, that is, a UE-DTX period T1. The UE discontinuously transmits uplink data, and the Node B discontinuously receives control information and uplink data of the uplink DPCCH.

Step S309: The UE determines whether there is a data transmission request on the uplink, and if yes, proceeds to step S310; otherwise, returns to step S308.

Step S310: The UE notifies the base station that the uplink data needs to be transmitted according to the set MAC-DTX period, and starts to send the uplink data according to the set MAC-DTX period. The Node B detects the notification according to the set MAC-DTX cycle, and after receiving the notification, receives the uplink data according to the MAC-DTX cycle. After the UE starts to send the uplink data, it immediately performs DTX in a short cycle of DTX, and returns to step S305.

In addition, the UE performs the DTX period with the DTX short period as the period. If the E-DCH has no E-DCH transmission in the set number of subframes since the last transmission, the set number is the UE static threshold, and the UE is still. If the value of the E-DCH needs to be transmitted, the time when the E-DCH starts to transmit may be limited, or the time at which the E-DCH starts to transmit may not be limited.

When the time for starting the transmission of the E-DCH is limited, the start time of the E-DCH transmission needs to be limited according to the transmission pattern of the uplink DPCCH, that is, the E-DCH can start transmission when the uplink DPCCH starts transmission according to the transmission pattern, and Further, the UE may perform E-DCH transmission by using a subframe that is located after the transmission pattern and whose continuous subframe length does not exceed the UE static threshold. At this time, Node B can perform discontinuous reception under the short DTX cycle.

When the time at which the E-DCH starts transmission is not limited, as long as the E-DCH needs to be transmitted, it can be transmitted immediately. At this time, Node B can perform discontinuous reception under the short DTX cycle.

The length of the MAC DTX period can be configured by the network upper layer to the UE and the Node B. For example, the MAC-DTX period length is set by the RNC in the UTRAN, and configured to the UE and the Node B. The network upper layer can set the MAC-DTX period length to be no longer than the DTX long period length, and further can set one The DTX long period includes one or more MAC-DTX periods. The network upper layer can further set the MAC-DTX cycle length according to the delay requirement of data recovery and the length of the DTX short cycle. Thus, the MAC-DTX cycle length is between DTX short cycle and 50 ms, and 50 ms is the service recovery time requirement. Further, one MAC-DTX cycle may include one or more DTX short cycles, in which case the boundary of the MAC-DTX cycle coincides with the boundary of the DTX short cycle.

When the UE needs to transmit uplink data, it must start sending the uplink data according to the set MAC-DTX cycle. The enhanced dedicated channel transmission format (E-DCH (Enhanced Dedicated Physical Channel) Transport Format of the Hybrid Automatic Repeat ReQuest ( HARQ ) entity of the UE may be used to transmit uplink data according to the MAC-DTX cycle. Combination, E-TFC) selection function, the uplink data must be limited according to the MAC-DTX cycle start transmission, that is, the UE's HARQ entity performs E-TFC selection according to the set MAC-DTX cycle, so that the UE starts transmission according to the MAC-DTX cycle. Upstream data. Considering that the transmission patterns of different UEs are distributed in different subframes of the radio frame by setting different DTX-DRX offsets, the uplink DPCCH is performed during the DTX period with the DTX long period. If the UE needs to transmit uplink data, the HARQ entity needs to The E-TFC selection is performed, that is, in a Connection Frame Number (CFN), the HARQ entity performs E-TFC selection when the following conditions are met.

For a 2ms Transport Time Interval (TTI):

[5 CFN+subframe number+DTX DRX Offset] mod MAC DTX period =0 where subframe number is the apostrophe in the sub.

For a TTI of 10ms:

[CFN + DTX DRX Offset] mod MAC DTX Period = 0 The transmission pattern of the UE distributes the transmission pattern on different subframes of the radio frame by setting different DTX-DRX offsets, and the DTX-DRX offset can be UE – DTX – DRX offset.

In the CPC state, when the uplink DPCCH is in the DTX period with the DTX long period as the period, if the UE needs to initiate the uplink data transmission, before transmitting the uplink data, the Node B needs to be notified that the uplink data needs to be sent, and the UE notifies the Node B that the uplink data needs to be sent. The UE is configured to send a preamble to the Node B. The length of the preamble can be configured by the upper layer of the network, such as the length of the preamble configured by the RNC in the UTRAN. The Node B determines whether the UE initiates uplink data transmission by detecting the preamble, and updates the multipath information at the same time. The preamble slot format can be used when the uplink DPCCH is used. The slot format, the transmission power control (TPC) field included in the preamble carries a predefined sequence, and is used to identify that the preamble is used to notify the Node B that the UE needs to initiate uplink data transmission.

The Node B receives the uplink DPCCH discontinuously according to the parameter MAC_DTX period and the preamble length, and periodically detects whether the UE initiates uplink data transmission, that is, whether the Node B detects multiple slots in the MAC-DTX period boundary to notify the UE that the UE needs to be initiated. For the preamble of the uplink data transmission, the specific number of time slots of the multiple time slots may correspond to the preamble length, for example, the specific number of time slots is the preamble length. Since the transmission patterns of different UEs are distributed in different subframes of the radio frame by setting different DTX-DRX offsets, after the Node B detects the preamble, the uplink data is closest to the current MAC-DTX cycle. The next DTX short-period boundary begins to transmit, while the upstream DTX period is converted from the DTX long period to the DTX short period, as shown in FIG. Similarly, in a CFN, Node B receives uplink data when the following conditions are met.

For a TTI of 2ms:

[5 CFN+subframe number+DTX DRX Offset] mod MAC DTX period =0 where subframe number is the sub-apostrophe.

For a TTI of 10ms:

[CFN + DTX DRX Offset] mod MAC DTX Period =0

The transmission pattern of the UE distributes the transmission pattern on different subframes of the radio frame by setting different DTX-DRX offsets, and the DTX-DRX offset may be UE-DTX-DRX offset.

Since the preamble carrying the predefined sequence is used to identify that the preamble is a notification for the UE to initiate uplink data transmission, and the uplink data starts to be transmitted according to the MAC-DTX cycle, the period of the uplink DTX is converted from the DTX long period to the DTX short period, therefore, The preamble can also be used as a physical layer signaling for DTX long period switching to DTX short period. The uplink DPCCH performs the DTX period with the DTX long period as the period. If the preamble that needs to be sent before the uplink DPCCH sends the uplink data overlaps with the preamble that needs to be sent before the uplink DPCCH transmission pattern, the uplink DPCCH only needs to send the uplink data. The preamble sent.

When the configured parameter UE DTX long preamble is true, the network upper layer, such as the RNC, can configure the UE-DTX long preamble length according to the DTX long period length, such as 3 time slots, 6 time slots, 9 time slots, and 12 time slots. Gap, 15 time slots, and so on, instead of fixing the preamble length of 15 slots as in the prior art, saves network transmission resources. Thus, the UE is at the set MAC-DTX cycle boundary When transmitting the uplink data, the Node B will detect the preamble on the set number of time slots before the set MAC-DTX cycle, and the set number is the preamble length configured by the network upper layer.

As shown in FIG. 8, the CPC parameters of the network high-level configuration include: DTX—the DRX offset is 2 subframes, the UE-DTX period 1 is 4 subframes, the UE-DPCCH burst 1 is 1 subframe, and the UE DTX period 2 The length is 16 subframes, the UE-DPCCH burst 2 is 1 subframe, the static threshold of entering the UE DTX period 2 is 4 subframes, the MAC-DTX period is 8 subframes, the UE DPCCH burst preamble is true, UE DTX The preamble length (UE_DTX_preamble_length) is 3 slots, the UE-DTX long preamble is true, and the UE-DTX long preamble length is 6 slots.

According to the CPC state transition process described in FIG. 7, it can be seen that during the establishment or reconfiguration of the packet service connection between the UTRAN and the UE, the RNC determines that the UE supports the CPC mode and then configures the relevant CPC parameters. The UTRAN learns the uplink data amount by using the uplink data buffer status carried in the scheduling information reported by the UE, and learns the downlink data quantity through the data queue status of the UE on the UTRAN side. If the UTRAN detects that the amount of uplink packet service data is lower than the pre-configured threshold, data discontinuous transmission, or no data transmission timeout, the connection enters the CPC state, and the uplink DPCCH changes from continuous transmission to periodic interval with the DTX short period as the period. The uplink DTX, the UE sends the uplink data discontinuously, and the Node B discontinuously receives the control information and the uplink data of the uplink DPCCH. If the UTRAN detects that the amount of uplink and downlink packet service data exceeds the pre-configured threshold, and the short-cycle DTX cannot meet the data transmission requirement, the CPU state is exited and returned to the normal state, the uplink DPCCH is continuously transmitted, and the UE continuously sends uplink data. B continuously receives the control information and uplink data of the uplink DPCCH. Otherwise, the UE still sends the uplink data discontinuously, and the Node B still receives the control information and the uplink data of the uplink DPCCH discontinuously. In the DTX short-cycle state, if the UTRAN detects no uplink data transmission timeout, the DTX short-cycle state is converted to the DTX long-cycle state, and the UE performs the discontinuous transmission of the uplink data in the DTX long period, and the Node B performs the DTX long-period period. The control information and the uplink data of the uplink DPCCH are discontinuously received.

As can be seen from the above description, during the uplink with the DTX short period as the period, the UE may start uplink data transmission at any time, such as E-DCH transmission, and the Node B needs to continuously receive the uplink DPCCH of the UE; during the uplink with the DTX long period as the period The Node B periodically detects a number of time slot preambles in the MAC-DTX cycle to determine whether the UE initiates uplink data transmission, and does not detect and receive the uplink channel of the UE in other time slots, thereby effectively saving the receiver resources of the Node B. . As shown in FIG. 9, the terminal for implementing uplink discontinuous transmission includes: a clock control unit 410, a notification unit 420, and a data transmitting unit 430.

The clock control unit 410 is configured to: when the terminal needs to transmit uplink data, notify the notification unit to send an uplink data transmission notification according to the set MAC-DTX period, and notify the data sending unit to send the uplink data according to the set MAC-DTX period;

The notification unit 420 is configured to send an uplink data transmission notification according to the notification information from the clock control unit.

The data sending unit 430 is configured to start sending the uplink data after receiving the notification information of the clock control unit.

10 is a schematic structural diagram of a base station that implements uplink discontinuous transmission according to an embodiment of the present invention. As shown in FIG. 10, a base station that implements uplink discontinuous transmission includes a clock triggering unit 510, a notification detecting unit 520, and a data receiving unit 530.

The clock triggering unit 510 is configured to: according to the set MAC_DTX period, the notification detecting unit 520 detects whether there is an uplink data transmission notification, and according to the feedback from the notification detecting unit, and receives the data receiving unit 530 according to the set MAC-DTX period. Uplink data

The notification detecting unit 520 is configured to detect an uplink data transmission notification according to the notification from the clock triggering unit 510, and perform feedback to the clock triggering unit 510;

The data receiving unit 530 is configured to start receiving the uplink data according to the notification from the clock triggering unit 510. The notification detecting unit 520 may feed back the information of detecting the uplink data transmission notification to the clock triggering unit 510 after detecting the uplink data transmission notification. At this time, after receiving the feedback, the clock triggering unit 510 notifies the data according to the set MAC-DTX period. The receiving unit 530 receives the uplink data. The notification detecting unit 520 can also feed back to the clock triggering unit 510 regardless of whether the uplink data transmission notification is detected. At this time, the clock triggering unit 510 determines that the notification detecting unit 520 detects the received feedback according to the received feedback. After the uplink data transmission notification, the data receiving unit 530 receives the uplink data according to the set MAC-DTX period.

FIG. 11 is a schematic structural diagram of a system for implementing uplink discontinuous transmission according to an embodiment of the present invention. As shown in FIG. 11, a system for implementing uplink discontinuous transmission includes: a terminal and a base station, where the terminal is used when the terminal needs to transmit uplink data. Sending an uplink data transmission notification according to the set MAC-DTX period, and starting to send uplink data according to the set MAC-DTX period; According to the set MAC-DTX period, it is detected whether there is an uplink data transmission notification, and after receiving the uplink data transmission notification, the uplink data is started according to the set MAC-DTX period.

The terminal further includes a clock control unit 411, a notification unit 421, and a data transmitting unit 431. The base station further includes a clock triggering unit 511, a notification detecting unit 521, and a data receiving unit 531. The clock control unit 411 in the terminal is configured to: when the terminal needs to transmit the uplink data, send the uplink data transmission notification to the base station according to the set MAC-DTX period notification unit 421, and notify the data sending unit according to the set MAC-DTX period. 431 transmits uplink data to the base station; the data transmitting unit 431 transmits uplink data to the data receiving unit of the base station. The clock triggering unit 511 in the base station is configured to detect, according to the set MAC-DTX period, the notification detecting unit 521 to detect whether the uplink data transmission notification sent by the notification unit 421 of the terminal is received, and the notification detecting unit 521 performs the notification according to the clock triggering unit 511. Detecting and feeding back to the clock triggering unit 511. If the notification detecting unit 521 feeds back the received uplink data transmission notification, the clock triggering unit 511 notifies the data receiving unit according to the set MAC_DTX period after receiving the feedback. 531 receives uplink data transmitted by the data transmitting unit 431 of the terminal. The notification detecting unit 521 can feed back the information of the uplink data transmission notification to the clock triggering unit 511 after detecting the uplink data transmission notification. At this time, after receiving the feedback, the clock triggering unit 511 notifies the data according to the set MAC-DTX period. The receiving unit receives the uplink data. The notification detecting unit 521 can also feed back to the clock triggering unit 511 regardless of whether the uplink data transmission notification is detected. At this time, the clock triggering unit 511 determines that the notification detecting unit 521 detects the uplink according to the received feedback. After the data transmission notification, the data receiving unit 531 receives the uplink data according to the set MAC-DTX period.

A person skilled in the art may understand that all or part of the modules or steps in the foregoing embodiments may be implemented by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, such as a storage medium, such as ROM/RAM, disk, CD, etc. Alternatively, they may be fabricated into individual integrated circuit modules, or a plurality of modules or steps may be fabricated into a single integrated circuit module. Thus, the invention is not limited to any particular combination of hardware and software. The spirit and scope of the invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Rights request

A method for transmitting data of a wireless packet service, comprising: in a discontinuous transmission state, if there is no uplink data transmission within a preset time, if the terminal needs to restart uplink data transmission, the transmission starts. The time meets the pattern of the preset period.

The method according to claim 1, wherein the starting the transmission to meet the preset period of time includes:

The enhanced dedicated channel transmission joint format E-TFC selection is performed according to the pattern of the preset period.

3. The method according to claim 1, wherein when there is no uplink data transmission within a preset time, the preamble is sent before the terminal restarts the uplink data transmission according to the preset period pattern.

4. The method according to claim 3, further comprising:

The base station periodically detects the preamble and packet data of the channel;

When the preamble and the packet data are detected, data is received according to a preset period pattern.

5. The method according to claim 4, further comprising:

After detecting the preamble, searching for and acquiring multipath information;

The packet data is received using the multipath information.

6. A method of receiving data, comprising:

The method according to claim 6, further comprising: searching for and acquiring multipath information after detecting the preamble; receiving the multipath information by using the multipath information when returning to a short period gating state Group data.

The method according to claim 6, wherein the returning to the short-cycle gating state to receive the packet data further comprises:

If the network side and the user equipment detect that the amount of the uplink and downlink channel packet data exceeds a predetermined threshold, the network side and the user equipment exit the short period gating state, and the network side and the user equipment continuously receive the packet. data.

The method according to claim 8, wherein after continuously receiving the packet data, the method further comprises:

When the network side and the user equipment detect that the amount of uplink and downlink channel packet data is lower than a predetermined threshold, the network side and the user equipment enter short-cycle gating reception.

The method according to claim 6, wherein after the packet data is all received, the method further includes:

When the network side and the user equipment detect that the time of no packet data transmission on the uplink channel is timed out, the network side and the user equipment exit the short cycle gating state, and return to the long period gating reception.

The method according to claim 6, wherein the detecting is performed by using a pre-defined fixed sequence in the transmission power control domain TPC in the preamble.

12. A data receiving device, comprising:

13. The device according to claim 12, further comprising:

The multipath information updating unit is configured to search for and acquire multipath information after the detecting unit detects the preamble.

The apparatus according to claim 13, wherein the receiving unit receives the packet data by using the multipath information acquired by the multipath information updating unit.

The device according to claim 12, wherein the device is in the network side and the user equipment, and the detecting unit is further configured to: when detecting that the amount of uplink and downlink channel packet data exceeds a predetermined threshold, notify the state adjustment The current receiving state of the unit adjusting device is a continuous receiving state.

The device according to claim 15, wherein the detecting unit of the network side and the user equipment is further configured to notify a status when detecting that the amount of uplink and downlink channel packet data is lower than a predetermined threshold The adjustment unit adjusts the receiving state of the current device to a short cycle gating state.

The device according to claim 12, wherein the device is in the network side and the user equipment, and the detecting unit in the network side and the user equipment is further configured to detect that there is no packet in the uplink channel and the downlink channel. When the time of data transmission expires, the notification state adjustment unit adjusts the reception state of the current device to a long-cycle gating state.

A method for processing a terminal in an uplink discontinuous transmission, comprising: the terminal performing a DTX period with a discontinuous transmission DTX long period as a period, and when the terminal needs to perform uplink data transmission, according to the set media access control MAC— The DTX period informs the base station that it needs to transmit uplink data, and starts to send uplink data according to the set MAC-DTX period.

The method according to claim 18, wherein the starting to send uplink data according to the set MAC-DTX period comprises: performing an enhanced dedicated channel transmission joint format E-TFC selection according to the set MAC-DTX period.

20. The method of claim 19, wherein

When the transmission time interval TTI is 2 milliseconds, the subframe number for performing the E-TFC selection satisfies:

[5 X connection frame number CFN + subframe number + DTX_ discontinuous reception DRX offset] mod MAC - DTX period =0;

When the TTI is 10 milliseconds, the CFN selected for E-TFC satisfies:

[CFN + DTX DRX Offset] mod MAC DTX cycle =0.

The method according to claim 18, wherein the terminal performs DTX with a DTX short period as a period before a DTX long period as a period, and a DTX short period MAC-DTX period length service recovery time. .

22. The method of claim 21, wherein

When the MAC-DTX period is an integer multiple of the short period of the DTX, the sending of the uplink data according to the set MAC-DTX period includes:

Start transmitting uplink data on the set MAC-DTX cycle boundary; or,

When the MAC_DTX period is not an integer multiple of the DTX short period, the setting according to the

The MAC-DTX cycle begins to send uplink data, including:

The next DTX short period boundary closest to the current MAC-DTX cycle begins to transmit uplink data.

The method according to any one of claims 18 to 22, wherein the notifying the base station that the uplink data needs to be transmitted according to the set MAC-DTX period includes: And transmitting, to the base station, a preamble carrying a predefined sequence, where the predefined sequence is used to identify the preamble to notify the terminal that the base station needs to initiate uplink data transmission.

24. The method of claim 23, wherein the length of the preamble is set according to a DTX long period length.

The method according to claim 23, wherein if the preamble and the preamble to be transmitted before the uplink DTX pattern overlap on the time slot, only the preamble is sent to notify the base station that the terminal needs to initiate uplink data transmission. The lead.

The method according to claim 1822, further comprising: after the uplink data is sent according to the set MAC-DTX period, the terminal performs the discontinuous transmission DTX with the DTX short period as a period.

27. The method according to claim 18, further comprising:

The terminal performs DTX during the period of discontinuous transmission DTX long period.

After detecting the notification from the terminal according to the set MAC-DTX period, the base station starts receiving uplink data according to the MAC-DTX period.

28. The method of claim 27, wherein

The receiving the uplink data according to the set MAC-DTX period, including: starting to receive the uplink data on the set MAC-DTX period boundary;

The detecting the preamble according to the set MAC-DTX period includes:

The preamble is detected on a set number of time slots before the set MAC-DTX cycle boundary, and the set number is a preamble length set by the network upper layer according to the length of the DTX long period.

29. The method of claim 28, wherein

When ΤΉ is 2 milliseconds, the subframe number that receives the uplink data according to the MAC-DTX period satisfies:

[5 CFN+subframe number +DTX DRX offset] mod MAC DTX cycle =0;

When the TTI is 10 milliseconds, the CFN that receives the uplink data according to the MAC-DTX cycle satisfies:

[CFN + DTX DRX Offset] mod MAC DTX cycle =0.

The method according to claim 27, further comprising: the base station discontinuously receiving the uplink control information and the uplink data in a DTX short period, or the base station continuously receiving the uplink control information and the uplink data.

A terminal for implementing uplink discontinuous transmission, wherein the terminal includes: the clock control unit, configured to: when the terminal needs to transmit uplink data, according to the setting

The MAC-DTX period informs the notification unit to send an uplink data transmission notification, and informs the data sending unit to send uplink data according to the set MAC-DTX period;

The data sending unit is configured to start sending uplink data according to the notification information of the clock control unit.

32. A base station for implementing uplink discontinuous transmission, comprising:

33. A system for implementing uplink discontinuous transmission, the system comprising a terminal and a base station, wherein the feature is

When the terminal needs to transmit uplink data, the terminal sends an uplink data transmission notification according to the set MAC-DTX cycle, and starts to send uplink data according to the set MAC-DTX cycle; the base station detects whether there is any according to the set MAC-DTX cycle. The uplink data transmission notification, and after receiving the uplink data transmission notification, starts to receive the uplink data according to the set MAC-DTX period.