CN100450245C - Event-triggered data collection - Google Patents
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- CN100450245C CN100450245C CNB2004800087885A CN200480008788A CN100450245C CN 100450245 C CN100450245 C CN 100450245C CN B2004800087885 A CNB2004800087885 A CN B2004800087885A CN 200480008788 A CN200480008788 A CN 200480008788A CN 100450245 C CN100450245 C CN 100450245C
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Abstract
A method of obtaining data useful for one or more network applications is described. The method is performed responsive to a triggering event, such as a dropped call, a position fix, or even expiration of a timer. A position estimate for a subscriber station is obtained responsive to the event. A record is then formed associating the position estimate for the subscriber station with an identifier of the triggering event and/or data measured or obtained responsive to the event, such as the strength of one or more pilots visible to the subscriber station. The record is either stored locally or transmitted to a remote location. In one implementation, the record is transmitted to a remote location, and stored in a database holding like records relating to other subscriber stations.
Description
Related application
The application requires the priority of U.S. Provisional Application No.60/444246 that submitted on January 30th, 2003 and the U.S. Provisional Application No.60/463910 that submitted on April 17th, 2003.
Technical field
The present invention relates to wireless communication field, relate in particular to the collection data useful network application.
Background technology
The current means that are used to collect the useful data of network application are labor-intensive, especially, need to use specialized apparatus and operator.For example, in Fig. 1, enable the special driving test process that comprises the vehicle 118 of having equipped special-purpose reception and watch-dog and collect data.In shown instantiation, the purpose of collecting data is to optimize the layout of repeater 110 and enlarge the overlay area that combination provided by (alms giver) base station 108 and repeater 110.Network technology personnel's steering vehicle 118 120 travels along the path, at measurement place 128a, 128b, 128c and the 128d place along route 120, measures by sending and by the intensity of the pilot signal of repeater 110 relayings base station 108.Position or the priori of measuring the place are known, or obtain by the special-purpose GPS location determining device in the vehicle 118.Then, this measurement result is used to optimize the layout of repeater 110.
The method existing problems of this data collection because the route 120 that the network technology personnel travel is normally specific, therefore can not guarantee that it is similar to the use pattern of subscriber station in this zone.
Another problem is, equipment and operator of being used to carry out this test of travelling are normally special-purpose, and this has increased the cost of data collection.
The 3rd problem is, the data of collecting by this process only are from discrete measurement place sample collection, so usually accurate inadequately its use in network application, therefore the rough approximation for the overlay area of this network or networking component only is provided.For example, among Fig. 1, the pilot signal strength measured value that obtains at discrete measurement place 128a, 128b, 128c and 128d place only provides with this base station 108/ repeater 110 and has made up the approximate of corresponding expanded areas of coverage.And, the independent transient state when these data have only been represented system's operation.
Summary of the invention
A kind of method that is used to obtain to the useful data of one or more network applications has been described.This method is triggered by the appearance of an incident.This method comprises the location estimation that obtains a subscriber station.Then, form a record, this record measure with the identifier of this location estimation and this trigger event with in response to this trigger event or the data that obtain in arbitrary or the two associate.Then, store or send this record.In one embodiment, completely or partially carry out this method by each subscriber station in one or more subscriber stations.In another embodiment, completely or partially carry out this method by each network entity in one or more other network entities such as base station or position determination entity.In the 3rd embodiment, carry out this method by in the combination of one or more subscriber stations and one or more other network entities each.In a kind of configuration, after trigger event takes place, start the location of subscriber station, and, according to locate resulting location estimation by this, form a record.Perhaps,, then form this record according to it if think that the location estimation of subscriber station of previous acquisition is still accurate.In one implementation, this record is stored in this locality.Perhaps, also this record can be sent to a remote location.Realize this record being sent to a remote location, and it being stored in the database in the example at one, this database is preserved by the relevant formed record of similar data of other subscriber station of serving with this network.Then, the data in this database can be used for the network planning, optimization, checking or operation purpose.
Described the memory of specific implementation said method, also described system according to said method work.By studying following drawings and detailed description carefully, for a person skilled in the art, other system, method, feature and advantage of the present invention will be maybe will become apparent.It is pointed out that all so other systems, method, feature and advantage all comprise in this manual, protect within protection scope of the present invention and by the claim of being added.
Description of drawings
Parts in the accompanying drawing not necessarily are shown to scale, but focus on the explanation of the principles of the present invention.In these accompanying drawings, corresponding parts in the identical reference number indication different views.
Fig. 1 describes to be used to collect to the network planning or to optimize the schematic diagram of an example of the driving test process of useful data;
Fig. 2 is the flow chart according to the embodiment of the method for the present invention that obtains data in response to the appearance of an incident;
Fig. 3 shows the example of the form of the formed database record of data that is obtained by the method according to Fig. 2;
Fig. 4 shows the example that the hybrid position that covers on the wireless communication system is determined system;
Fig. 5 A shows an example of failed handoff scenario;
Fig. 5 B shows the example of the map that is used to identify failed handoff;
Fig. 5 C is the flow chart of the embodiment of the method carried out during network operation when a subscriber station enters or is positioned at failed handoff;
Fig. 6 is a curve chart, and it has described the effect that reduces one or more switching dependent thresholds that this subscriber station can use when subscriber station enters failed handoff;
Fig. 7 shows the example of the situation that the method for Fig. 2 when selected subscriber station enters, leaves or pass a coverage gap is performed;
Fig. 8 shows the example of the map that is used to identify coverage gap;
Fig. 9 A shows the example of the situation of the method for execution graph 2 in response to a customer incident;
Fig. 9 B shows the form of pilot signal strength measurement message (PSMM) in the IS-95 compatible system;
Fig. 9 C shows the example of gradient map of the overlay area of a base station that is used for describing wireless communication system;
Figure 10 is the block diagram of embodiment of a system that is used for the method for execution graph 2;
Figure 11 be realize or the wireless communication system of the system of integrated Fig. 2 in the block diagram of a subscriber station.
Detailed Description Of The Invention
Terms more used herein, for example " approximately ", " basically ", " approx " and " approaching " are for the redundancy on some mathematics accuracies is provided to acceptable tolerance in the industry.Therefore, use " approximately ", " basically ", " approx " or " approaching " these terms 1% to 2% or lower scope in the deviation up or down of the numerical value revised, should be considered to fall into clearly within the scope of setting.
Term used herein " software " comprises source code, assembler language code, binary code, firmware, macro-instruction etc., or above-mentioned two or more any combination.
Term " memory " refers to any processor readable medium, including, but not limited to: RAM, ROM, EPROM, PROM, EEPROM, disk, floppy disk, hard disk, CD-ROM, DVD etc., or above-mentioned two or more combination in any, can store the executable software instruction of a series of processors on it.
Term " processor " or " CPU " refer to carry out any device of a series of instructions, including, but not limited to: universal or special microprocessor, finite state machine, controller, computer, digital signal processor (DSP) etc.
Term " logic " refers to the implementation with the combination in any of hardware, software or software and hardware.
Word " base station " (BTS) comprises independent sector in omni-base station, sector base stations and the sector base stations.
Word " gps satellite " comprises transatmospheric vehicle (SV).
Word " wireless communication system ", " system " or " network " refer to provide any system of communication service by the media of diffusion to subscriber station, including, but not limited to: the system of honeycomb, non-honeycomb, fixed radio, AMPS, PCS, CDMA, TDMA, GSM, IS-95 compatibility, CDMA-2000 and WCDMA compatibility.These words also including, but not limited to: merge, the integrated wireless communication system of position determination system, or the wireless communication system that covers by position determination system.
Word " position determination system " comprises the position determination system that covers on the wireless system, is integrated in the wireless system or merges with wireless system.
Term " record " refers to any association of two or more data item.In an application, term " record " is any association that is used as two or more data item of handling a unit.
Fig. 2 shows the flow chart of acquisition to the embodiment of the method for the useful data of one or more network applications.In this embodiment, this method is triggered by the appearance of incident 200.In one implementation, completely or partially carry out this method by each subscriber station in one or more subscriber stations.In another kind of implementation, completely or partially carry out this method by each entity in one or more other entities such as base station or position determination entity in the wireless communication system.In the third implementation, completely or partially carry out this method by in the combination of one or more subscriber stations and one or more other network entities each.The method comprising the steps of 202, is used to obtain the location estimation of a subscriber station.In one implementation, this step comprises: in response to this incident, start the location of subscriber station, then, obtain the location estimation of this subscriber station.In another kind of implementation, this step comprises: if thereby preceding one-time positioning is effectively or in this location estimation of still thinking with the enough approaching time acquisition of the time of occurrence of trigger event 200 to be accurately, then obtain the location estimation of this subscriber station of producing by preceding one-time positioning.If carry out, can start this location by subscriber station, perhaps can pass through another network entity, utilization offers its time measurement by subscriber station, starts the location.Next the certain methods of the location can be used for carrying out subscriber station is discussed.This location produces the location estimation of subscriber station.
This method also comprises optional step 204, and one or more DATA REASONING are carried out or obtained to this step in response to the appearance of incident.In one embodiment, carry out or obtain one or more DATA REASONING by subscriber station.In another embodiment, carry out or obtain one or more DATA REASONING by another entity such as base station or position determination entity in the wireless communication system.Though this step occurs in after the step 202 in Fig. 2, it should be understood that this step also can take place with step 202 is parallel.
This method also comprises step 206, this step be associated with the identifier of trigger event 200 by the location estimation that will be in the step 202 obtains and by arbitrary in optional step 204 resulting one or more DATA REASONING or the two be associated, form a record.
The form of the example of this record has been shown among Fig. 3.In this instantiation, this record comprises: field 300 is identifiers of trigger event; Optional Field 302 is in response to trigger event and one or more DATA REASONING of catching or collecting; Field 304 is in response to the appearance of trigger event and the location estimation of the subscriber station that obtains.
Can by or for each entity in a plurality of network entities that in radio communication and/or position determination system, move, the method in the execution graph 2.In one implementation, by or in this system, move whole or whole each subscriber station in the subscriber stations basically, carry out this method.In another kind of implementation, for the related subscriber station that authorized or that selected of user that gives special consideration with forms such as returning, discounts, carry out this method, so that in data acquisition, use their subscriber station.Can collect the record of all these subscriber stations and it is stored in the central database.Because each record will be big when trigger event occurs in estimation and the event ID of subscriber station position and the one or more DATA REASONING that obtain in response to this trigger event arbitrary or the two be associated, so the data that derive from these records are suitable for the network planning, optimization, checking or operational applications very much.Compare with the conventional method that is used to collect data that relates to the test of travelling etc., this method expense is lower, because this method carries out by existing equipment in the network, and does not need to use special equipment.And this method is more accurate because collected data are not specific, but reflected should the zone in the use pattern of subscriber station reality, and the sampled point that is not limited to disperse.
In one embodiment, the method for Fig. 2 triggers by a network event.In this embodiment, have the multiple network incident, comprise those incidents by the initial observation of subscriber station, and by initial those incidents observed of another entity in the network.The example of possible trigger network incident comprises: real or approaching dropped calls state; Subscriber station enters the overlay area of particular network or network entity; Subscriber station leaves the overlay area of particular network or network entity; The periodic timeout of subscriber station timer outside the overlay area of network or network entity the time; This switches to direct-cut operation or soft handover real or approaching switching state; Subscriber station walking between the overlay area of two networks or network entity; Subscriber station walking between the overlay area of donor base station and repeater; Detect the pilot signal or the base station of beyong contemplation at the subscriber station place; Perhaps, detect neighbours or pilot signal in the candidate list or the base station that is not present in this subscriber station at the subscriber station place.Other example also is possible, so should all not be interpreted as having in above-mentioned any one restricted.
In another embodiment, the method of Fig. 2 is triggered by the customer incident such as starting the location, or by calling out such Event triggered that will cause starting the location usually such as 911, or, for example in the certain limit of the current location of subscriber station, search for restaurant or other facility by in supporting the subscriber station of Web, starting the service search triggering relevant with the position.Other example of customer incident also is possible, has restricted so should not be considered as these instantiations.
In the 3rd embodiment, this incident is the overtime of timer or other timing unit, and for example, timer timing up or down reaches a desired value or level, or similar situation.
In one embodiment, determine the position of subscriber station by covering position determination system on the wireless communication system, this subscriber station is operated in this wireless communication system.As shown in the figure, subscriber station 412 receive by a plurality of reference source 402,404,406 and 408 emissions, for the visible signal of the receiver in this subscriber station.As shown in the figure, these reference source can be the combinations of base station (BTSs), gps satellite or BTSs and gps satellite.
Signal of each reference source emission with the identification code modulation of this reference source of unique identification.In one implementation, this identification code is the PN sign indicating number, this PN sign indicating number according to related reference source length with periodically aspect can be different.For the cdma system of IS-95 compatibility, the PN sign indicating number is the sequence with 32768 chips of per 26.67 milliseconds of repetitions.In the Current GPS system, the PN sign indicating number is the sequence with 1023 chips of every millisecond of repetition.
Perhaps, its position is determined in reference source 402,404,406 that subscriber station 412 also can provide to it according to time measurement with by PDE 400 or other data source and 408 position.
In one implementation, the location estimation that acquisition obtains in step 202 in response to starting AFLT (AFLT) location promptly, according to the time measurement that the forward link transmissions of initiating from the base station obtains, is determined location estimation.In second kind of implementation, obtain location estimation in response to the GPS location, that is, determine location estimation from the transmission that gps satellite is initiated.In the third implementation, obtain location estimation in response to the GPS assist location.In two steps, carry out the GPS assist location.In first step, be used to forward link transmissions, the apparent position at estimating user station from the base station.In second step, according to the gps satellite transmission, with the meticulous accuracy of adjusting to higher level of the location estimation of first step.
In one embodiment, the method according to this invention divides two stages to carry out.Phase I is a data collection phase.Second stage is a network applications phase.In the phase I, use the method for Fig. 2, by or for each subscriber station in a plurality of subscriber stations, collect data, and with storage in central database.In second stage, use these data to support one or more network applications.
In an embodiment of this two phase process, in first data collection phase, by or for each subscriber station in the one or more authorized users station in the network, the completely or partially method of execution graph 2.In second network applications phase, use the data that from the data of data collection phase, collecting, derive, support network operations.In this embodiment, the trigger event of data collection phase is: the dropped calls situation, after this situation, do not exist in the effort scale that subscriber station can be used during by dropped calls or non-existent base station, and regain communication service very soon.Known is that effort scale is the tabulation of the base station of and user profile that in IS-95 compatible system emission be used to switch visible for subscriber station.
This trigger event has been represented so a kind of situation, wherein: stop the switching that takes place to pilot tone, because, the pilot signal of target BS originally too a little less than, and can not be placed in the candidate list of subscriber station, but it becomes very strong then suddenly, has hindered and the communicating by letter of current base station to such an extent as to this target BS can be added this pilot signal before the active set of subscriber station in existing base station.If the appearance of the conversion of the pilot signal of target BS is faster than the speed that subscriber station is searched for its visible pilot signal, so, said circumstances can usually take place.
Fig. 5 A shows the example that this situation takes place.A subscriber station is included in the vehicle 500, and this vehicle 500 just 506 turned curved from the corner 512 of building 510 along the path.Before vehicle 500 had just turned turning 512, this subscriber station was conversed by base station 504.At this moment, base station 502 is not in the effort scale of subscriber station, because at this time base station 502 is not visible for this subscriber station.Vehicle 500 turns over after the turning 512, because base station 504 no longer is suddenly visible for this subscriber station, so dropped calls.Though base station 502 is visible for this subscriber station now, and the switching to this base station can not take place, because base station 502 is not present in the effort scale when dropped calls.Then, this subscriber station is by base station 502 obtaining communication service again.
When this trigger event occurring, this subscriber station starts or has started a location.If not having the base station of sufficient amount is visible can carry out enough accurate location based on AFLT for this subscriber station, so, start the auxiliary location of GPS or GPS.Then with the identifier of the location estimation that obtains and indication handoff failure state and one or morely be used for identifying two members of the Set For Current before handoff failure/dropped calls state just or wherein any one member or just two members in the Set For Current after handoff failure/dropped calls state or wherein any one member's identifier (for example PN sign indicating number), thereby form a record.In one implementation, also comprise the identifier of target BS 502, by target BS 502 obtaining communication service again.Then, this record is stored in the central database, has stored similar record in this database from other subscriber station in this system.Utilize this database to form a map then, for example the map shown in Fig. 5 B wherein, identifies failed handoff 516a, 516b, 516c and 516d in the overlay area 514 of this network.This database can also be used to form associated data, and this associated data is with the member in each zone in these failed handoff and the active set before handoff failure/dropped calls state just and/or just arbitrary among the member in the active set after handoff failure/disconnecting calling state or the two are associated.In one implementation, this associated data also is associated each failed handoff and target BS, and target BS promptly is to regain the base station of communication service by it after the handoff failure in data collection phase.
In the second stage of this method, subscriber station can obtain this map and relevant associated data thereof usually, with support network operations.In one embodiment, the method shown in each the subscriber station execution graph 5C in these subscriber stations.In the step 518 of this method, a subscriber station responds one or more trigger events, carries out or carried out the location, described trigger event comprise such as 911 call out or the service request relevant with the position customer incident.In inquiry step 520, it compares the position of failed handoff on resulting location estimation and the map, or it is compared.If the failed handoff that subscriber station is positioned at or approaches on the map to be identified, then execution in step 522.In step 522, target BS that will be related with this failed handoff is forced to list in the candidate list of this subscriber station, and/or, the switching sensitivity that improves this system.This makes network can start the switching to this base station, thereby avoids dropped call situation.
Perhaps,, for example, when entering failed handoff, subscriber station serves the base station of this subscriber station by the method that another entity in the network comes execution graph 5C, or PDE.In this embodiment, when subscriber station ran into failed handoff, this network entity was forced target BS is listed in the effort scale of subscriber station.Like this, network entity effectively force start to the switching of target BS.
In second embodiment of this dual stage process, in first data collection phase, as previous embodiment, the sign failed handoff.Yet, in second network applications phase, when detecting that a subscriber station enters failed handoff or when in this failed handoff, working, not to force a base station to enter the candidate or the effort scale of this subscriber station, but, be used to support one or more threshold values of switching to make amendment to subscriber station (or serving the base station of this subscriber station) so that thereby subscriber station is hopeful to start or to have started the mode that a switching state is avoided the dropped calls state very in time.
In one embodiment, when a subscriber station enters failed handoff, reduce the T_ADD threshold value that can be used for this subscriber station.Known is, in the IS-95 compatible system, the T_ADD threshold value is an absolute threshold, is used for judging whether a base station of the neighbor list of this subscriber station is added in the candidate list of this subscriber station.In this implementation, when subscriber station enters failed handoff, reduce the T_ADD threshold value that can be used for this subscriber station.Then, suppose that the target BS related with this failed handoff is Already in the neighbor list of this subscriber station, by abundant reduction T_ADD threshold value, the pilot signal related with this target BS more promptly enters in the candidate list of this subscriber station, thereby make network can start to the switching of that base station quickly, and got a good chance of before dropped call situation takes place in succession.
Perhaps, except that reducing the T_ADD threshold value, when subscriber station enters failed handoff, also can make target BS force to enter the neighbor list of this subscriber station.Like this, though that base station not in the neighbor list of this subscriber station, network also can start the switching to this base station.
In another distortion, except that reducing the T_ADD threshold value and/or forcing target BS to enter neighbor list, effort scale or the candidate list of this subscriber station, when the roaming of this subscriber station enters failure when Zone switched, also can reduce the T_COMP threshold value that can be used for subscriber station.Known is, in the IS-95 compatible system, the T_COMP threshold value is a relative threshold, and when its judgement moves to the neighbor list of a base station from subscriber station the candidate list.By reducing the T_COMP threshold value, target BS more promptly moves in the candidate list that this subscriber station can use, thereby makes network can more promptly start switching to that base station, and gets a good chance of before the dropped calls state takes place in succession.
In another distortion, except that reducing T_ADD and/or T_COMP threshold value and/or forcing target BS to enter the neighbor list or candidate list of subscriber station, when subscriber station entered failed handoff, network also can only force target BS to enter in the effort scale of this subscriber station.Known is that in the IS-95 system, effort scale is the tabulation of subscriber station by its base station that communicates simultaneously.Exist a plurality of base stations to represent that subscriber station is in soft changing state in the effort scale.By forcing target BS to enter in the effort scale of subscriber station, this network has started soft changing state with this target BS.
In the 3rd distortion, search for pilot signals used search time in neighbours that shorten at subscriber station and/or the candidate list, whether should classify again to the one or more pilot signals in these pilot signals so that detect earlier.In one implementation, shorten search time by changing the filtration time constant, this filtration time constant is controlled at the required time of search for pilot signals in the neighbours of subscriber station and the candidate list.By shortening this search time, the pilot signal that makes it possible to surpass available T_ADD and T_COMP threshold value moves in the candidate list of subscriber station quickly.Like this, when subscriber station entered failed handoff, network also can start soft changing state quickly.In an example, will shorten to maximum 10ms from maximum 40ms search time.
Further specify the operation of an example of this implementation with reference to figure 6.Suppose, when subscriber station roaming enters failed handoff, this subscriber station with have pilot signal P
0The base station communicate.Therefore, this pilot signal P
0In the effort scale of this subscriber station.When the subscriber station roaming entered failed handoff, it began to detect target pilot signal P
1Enter after the failed handoff, subscriber station reduces its available T_ADD and T_COMP threshold value, drops to T_ADD ' from T_ADD respectively, drops to T_COMP ' from T_COMP.
At moment t
0, pilot signal P
1Intensity surpass T_ADD '.So, subscriber station to pilot signal P
0Related serving BS sends a pilot signal strength and measures message (PSMM), report pilot tone P
1Intensity, and indicate this serving BS with pilot signal P
1Add in the candidate list of this subscriber station.Time t
1Be with pilot signal P under the situation that the T_ADD threshold value is remained valid
1Time in the candidate list of adding subscriber station.
At moment t
2, pilot signal P
1Intensity surpass pilot signal P
0The amount of intensity be T_COMP ' * 0.5dB.In this instantiation, suppose that when the amount of intensity that surpasses the pilot signal of serving BS when the intensity of the pilot signal of target BS was T_COMP ' * 0.5dB, subscriber station moved into this target BS the candidate list from neighbor list.Correspondingly, at moment t
2, subscriber station sends another PSMM to serving BS, report pilot signal P
1Intensity, and indicate this serving BS that this target BS is added in the candidate list of subscriber station.Receive that hypothetical network moves into target BS in the effort scale after second PSMM, thereby utilize this target BS to start soft changing state.
At moment t
3, pilot signal P
0For subscriber station no longer is visible, and deletion from activity (and candidate) tabulation of this subscriber station.Yet any calling of carrying out when subscriber station enters failed handoff all there is not interruption, because be at moment t to the soft handover of target BS
2Start before.Moment t
4It is the time that has started under the given threshold T_COMP situation of remaining valid to the soft handover of target BS.Because this time is at moment t
3Afterwards, so, if T_COMP remains valid, dropped call situation will appear.Therefore, by the T_COMP threshold value is reduced to T_COMP ', as can be seen, to pilot signal P
1Soft handover start quickly, thereby avoid dropped call situation.
In the 3rd embodiment of this dual stage process, in first data collection phase, by or for the subscriber station of one or more mandates, collect data, and it be stored in middle position.In second network applications phase, these data are used to support one or more network plannings or optimize and use.
Can be with reference to the data collection phase of figure 7 these embodiment of explanation.Fig. 7 shows a cellular radio Communication system, and this system comprises sub-district 700a, 700b, 700c and 700d.Base station 702a, 702b, 702c and 702d serve corresponding each sub-district respectively.The overlay area of these sub-districts is identified by label 704a, 704b, 704c and 704d respectively.Gap in the combined coverage areas of these base stations or hole are identified by label 700e.Suppose the position determination system that on this wireless communication system, superposeed.This position determination system can be AFLT, GPS or GPS auxiliary system.
The station of authorized user of working in this wireless communication system is configured,, thereby collects data, use with network enabled planning or optimization with completely or partially execution or the method for execution graph 2.In Fig. 7, suppose that such subscriber station is placed in the vehicle 706.Another such subscriber station identifies with label 710.
In a kind of implementation of this embodiment, the trigger event that is used for enabling the method for Fig. 2 is: when the subscriber station roaming of a mandate enters in the gap 700e of system coverage area.In other implementation, described trigger event is: when the subscriber station of a mandate leaves this coverage gap.In the third implementation, described trigger event is: when this subscriber station is mobile in this coverage gap.In the 4th kind of implementation, described trigger event is: the combination in any of one or more above-mentioned situations.In an example, when having dropped calls or during, or when not have pilot tone be visible for this subscriber station, or when either way existing, detect the subscriber station roaming and enter coverage gap near the state of dropped calls.Equally, when subscriber station regains communication service, detect this subscriber station and leave coverage gap.
In example shown in Figure 7, when a subscriber station roaming in the subscriber station of these mandates enters coverage gap 700e, its startup or started a location, perhaps, thereby think that still this location estimation talks about accurately if the time of implementation of first prelocalization and this potential incident are enough approaching, then obtain or obtained a location estimation from previous location.Therefore, when vehicle 706 entered coverage gap 700e, at place 708a place, the subscriber station in the vehicle 706 started or has started the location, perhaps obtained or obtained a location estimation.Equally, when subscriber station 710 roamings entered coverage gap 700e, at place 712a place, subscriber station 710 started or has started the location, perhaps obtains or obtained a location estimation.
In one embodiment, when carrying out the location, at first attempt the GPS location.If unsuccessful, reattempt the GPS assist location.In this embodiment, will attempt as a last resort based on the location of AFLT.In another embodiment, check that whether the base station of sufficient amount is arranged is visible for subscriber station, to realize location based on AFLT.If not having the base station of sufficient amount when subscriber station enters coverage gap is visible to realize the location based on AFLT for this subscriber station, so, by the location among this embodiment of gps satellite transmission execution, suppose that GPS or GPS aided location determine that system is available.Also can adopt other embodiment, so, foregoing should be considered as having restricted.
Replacedly, or additionally, when subscriber station left coverage gap, after regaining communication service, this subscriber station started or has started the location, perhaps obtained or obtained location estimation.If start the location, can utilize AFLT transmission, GPS transmission or both combinations to carry out this location.Therefore, among Fig. 7, when the subscriber station in the vehicle 706 left this coverage gap 700e, at place 708b place, this subscriber station can start or start the location, perhaps obtained or obtained location estimation.Equally, when subscriber station left this coverage gap, at place 712b place, this subscriber station can start or start the location, perhaps obtained or obtained location estimation.
When subscriber station was mobile in coverage gap, it can also start or start-up period location (by timer etc.).These location realize by GPS or the auxiliary transmission of GPS that probably because when subscriber station is in the coverage gap, on notion, the AFLT transmission is not ready-to-use for subscriber station.Therefore, in Fig. 7, when the subscriber station in the vehicle 706 was mobile in coverage gap, at place 708c place, this subscriber station can start or start the location.This location can start behind timer expiry, and this timer starts when subscriber station enters coverage gap.Can periodically restart this timer, regain communication service up to this subscriber station.Thereby when subscriber station was mobile in coverage gap, it can start or start-up period location.
For each location estimation that is obtained, subscriber station forms or has formed a record, this record with the identifier of trigger event, whether enter, leave coverage gap or in coverage gap the location estimation of situation such as mobile and this subscriber station associate.Store this record, or send it to and be stored in the database that comprises similar record, the subscriber stations of this similar record and mandate.After a period of time, the data in this database can be used for supporting one or more network plannings or optimize and use.
In such application, the data from database derive map for example shown in Figure 8.This ground has illustrated the overlay area 800 of wireless communication system and coverage gap 802a, 802b, the 802c in this overlay area.This map can be used for supporting one or more network plannings or optimize to use, and wherein, the position of existing base station and/or repeater is optimized, and/or base station and/or repeater are added in this system, to eliminate or to reduce coverage gap.
In the 4th embodiment of this dual stage process, in the phase I, for or subscriber station by one or more mandates that in wireless communication system, move, carry out data collection, a position determination system covers this wireless communication system.Collect after the data, it is stored in the centralized location.In second stage, these data are used to support one or more network plannings, optimization or checking to use.
With reference to figure 9A first data collection phase is described.The figure shows a cellular radio Communication system, this system comprises sub-district 900a and the 900b that service is provided respectively by base station 904a and 904b.The overlay area of these sub-districts is represented by label 906a and 906b respectively.Assumed position determines that system covers on this wireless communication system.
One or more authorized users of working in this system are configured, and with completely or partially execution or the method for execution graph 2, wherein, trigger event is the startup of location, or causes the Any user incident of positioning starting usually by subscriber station.Example is 911 callings or request facility or the service relevant with the position in the subscriber station of supporting Web, for example, is positioned at the restaurant of this subscriber station certain distance.
In the example shown in Fig. 9 A, suppose that the subscriber station in the vehicle 920 that travels along route 908 starts or started the location or obtains or obtained location estimation at place 910a, 910b, 910c place.Obtain after the location estimation, the intensity and/or the phase place of the visible pilot signal of one or more these subscriber stations measured or measured to this subscriber station, and make or made one or more records, this record associates the location estimation of described one or more measurements and subscriber station.
In one implementation, subscriber station prepares or made an improved PSMM, it associates the conventional PSMM of an ionization meter that comprises the visible one or more pilot signals of subscriber station and the location estimation of subscriber station.Fig. 9 B shows a conventional PSMM, and wherein, for each pilot signal in the visible one or more pilot signals of the subscriber station of being reported, part 909 repeats.The meaning of each field is known among Fig. 9 B, does not need more detailed description in this disclosure content.This message expands in this implementation, and its field is used for the location estimation of subscriber station.
One or more records are stored, or with its transmission and be stored in the database, comprise the similar record relevant in this database with other subscriber station.After a period of time, when having had the record of sufficient amount in this database, start the second stage of this process.In second stage, from this database, derive one or more gradient map.In these gradient map each is all represented the gradient of the overlay area of a base station in this network.
Fig. 9 C shows an example of the gradient map that derives such as data that can be from be stored in database.As shown in the figure, this map comprises a plurality of orderly nebenkern profile 912a, 912b, 912c, and every outline line is related with specific pilot signal strength, and the order of these outline lines is: pilot signal strength reduces from the inner outline to the outer contour gradually.Therefore, in the example of Fig. 9 C, outline line 912a represents strong waveguide frequency signal intensity, and pilot signal strength during outline line 912b represents, outline line 912c are illustrated in the weak pilot signal strength at the external boundary place of base station coverage area.Derive after these gradient map, they can be used to support one or more network plannings, optimization or checking to use.In an example, use them that the RF propagation model that before was used to plan or optimize this system is verified.
In the 4th embodiment of this dual stage process, in first data collection phase, the trigger event of data collection is: in idle pulley, when the subscriber station of authorizing loses service.For example, when subscriber station runs into a new pilot signal, to such an extent as to and very strong this subscriber station of this pilot tone can not decode to current pilot signal or its any neighbours' paging channel the time, thisly lose service and may take place.When such trigger event occurring, determine the position of this subscriber station, and with its with the identifier of the identifier of this incident and/or new pilot signal and/or newly the measured value of the intensity of pilot signal be associated.Can by or in the subscriber station of a plurality of mandates each, carry out this data collection.In second network applications phase, produce those regional maps that run into these pilot signals in the network.In addition, studying these pilot signals, is the zone that pilot signal/neighbor list management still need be improved in the weak signal zone to judge them.
Figure 10 shows the embodiment of user's acquisition to the system of the useful data of one or more network applications.As shown in the figure, this system comprises processor 1000 and memory 1002.
Processor is configured to: visit is also carried out by the memory 1002 real software instructions of realizing.By carrying out these instructions, the method for processor 1000 execution graphs 2.
Subscriber station that can be by one or more mandates or other network entity of working in the position determination system of Fig. 4 are realized the system of Figure 10, perhaps it can be integrated into the subscriber station of these one or more mandates or other network entity of in the position determination system of Fig. 4, operating in.The record that these entities are formed sends to PDE 400, then it is stored in the database 402.After a period of time, the data that the data from be stored in this database derive can be used for supporting one or more described network plannings, optimization, checking or operational applications.Be used to support need this derived data is offered all subscriber stations that work in this system under the situation of the network operations application such as supporting switching in the data that derive.
Figure 11 shows the embodiment of a subscriber station, and this subscriber station is realized or the integrated system of Figure 10.Also can adopt other example, have restricted so should not be considered as Figure 11.
Wireless set 1106 is configured to: will be on the RF carrier wave such as the modulate baseband information sound or the data, and modulated RF carrier wave carried out demodulation to obtain base-band information.
Antenna 1110 is configured to: send modulated RF carrier wave by wireless communication link, and receive modulated RF carrier wave by wireless communication link.
Baseband processor 1108 is configured to: provide base-band information from CPU 1102 to transceiver 1106, to transmit by wireless communication link.Conversely, CPU 1102 obtains base-band information from the input equipment in the user interface 1116.Baseband processor 1108 also is configured to: provide base-band information from transceiver 1106 to CPU 1102.Conversely, the output equipment of CPU 1102 in user interface 1116 provides base-band information.
User interface 1116 comprises a plurality of equipment that are used to input or output the user profile such as sound or data.These equipment that are usually included in the user interface comprise keyboard, display screen, microphone and loud speaker.
GPS receiver 1112 is configured to: the composite signal that the pilot signal according to the visible gps satellite of subscriber station is formed receives and demodulation, and provides demodulated information to correlator 1118.Receive this composite signal by antenna 1114.
Wireless set 1106 is configured to: the composite signal that the pilot signal that the visible base station of subscriber station is sent forms receives and demodulation, and provides demodulated information to correlator 1118.Receive this composite signal by antenna 1110.
In this instantiation, GPS receiver 1112 and wireless set 1106 are shared same filter chain, but it should be understood that the example for an independent filter chain of they each self-configurings also is fine.
For GPS or GPS assist location, correlator 1118 is configured to: offering from GPS receiver 1112 derives the GPS correlation function its information.For AFLT or GPS assist location, correlator 1118 is configured to: derive base station correlation functions from wireless set 1106 offers its information.
Correlator 1118 also is configured to: from the peak value of the correlation function of its derivation, derive the time of advent and/or the time of advent difference measurement.Perhaps, CPU 1102 can offer from correlator 1108 and derive this information its correlation function.
Subscriber station can utilize this information, obtains radio communication service, and/or determine its position, perhaps, by other entity in PDE or the position determination system by determine its position based on AFLT, based on GPS or GPS supplementary mode.
Channel decoder 1120 is configured to: the channel symbol that baseband processor 1108 is offered it is decoded into basic source bit.In an example, channel symbol is the convolutional encoding symbol, and this channel decoder is a Viterbi decoder.In second example, channel symbol is that the serial or parallel of convolution code connects, and channel decoder 1120 is turbo decoders.
Memory 1104 is configured to: preservation is used to realize the method for Fig. 2 or the front is described or the software instruction of any embodiment, implementation, example or its distortion of suggestion.
CPU 1102 is configured to: visit and carry out these software instructions, thereby collect the data useful to the network planning, optimization, checking or operational applications.
The front is illustrated various embodiment, implementation and example, still, it is apparent that to also have more embodiment, implementation and example in protection scope of the present invention in the art those of ordinary skill.Therefore, except claims, the present invention is not subjected to any restriction.
Claims (49)
1. method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Detect the generation of network event;
Take place in response to detecting described network event, obtain to be operated in the location estimation of the subscriber station in the wireless communication system;
Form a record, this record measure with the identifier of the location estimation of described subscriber station and described network event with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
In response to forming described record, store or send described record;
Wherein, described network event comprise in following one of at least:
Described subscriber station enters the overlay area, and described subscriber station leaves the overlay area, and, timer expiry when outside the overlay area of described subscriber station at wireless communication system.
2. method according to claim 1, wherein, described network event is observed by described subscriber station.
3. method according to claim 1, wherein, described network event is observed by other entities except that described subscriber station in the described wireless communication system.
4. method according to claim 1, wherein, described network event comprises real or approaching dropped calls state.
5. method according to claim 1, wherein, described network event comprises the handoff failure state.
6. method according to claim 1, wherein, described network event comprises and switching or near switching state.
7. method according to claim 6, wherein, described switching state comprises direct-cut operation or soft changing state.
8. method according to claim 6 wherein, describedly comprises direct-cut operation or soft changing state near switching state.
9. method according to claim 1, wherein, described network event comprises that frequency band changes state.
10. method according to claim 1, wherein, described network event comprises:
Described subscriber station is walked between the overlay area of two wireless communication systems or system entity.
11. method according to claim 1, wherein, described network event comprises:
Described subscriber station is walked between the overlay area of donor base station and repeater.
12. method according to claim 1, wherein, described network event comprises:
Detect the pilot signal of beyong contemplation or pilot signal at described subscriber station place strong outside beyond expectation.
13. method according to claim 1, wherein, described network event comprises:
Detect the base station of beyong contemplation at described subscriber station place.
14. method according to claim 1, wherein, described network event comprises:
Detect the pilot signal in the neighbor list that is not present in described subscriber station at described subscriber station place.
15. a method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Detect the generation of the overtime incident of timer;
In response to the generation that detects described overtime incident, obtain to be operated in the location estimation of the subscriber station in the wireless communication system;
Form a record, this record measure with the identifier of the location estimation of described subscriber station and described overtime incident with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
In response to forming described record, store or send described record;
Wherein, described record associates described location estimation and one or more pilot signal strength and phase measurement; Wherein, one of at least related in the described pilot signal with the Traffic Channel that is present between described subscriber station and the base station; And wherein, described Traffic Channel be in forward traffic channel and the reverse traffic channel one of at least.
16. a method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Detect the user and initiate the generation of 911 call events;
In response to the generation that detects described call event, obtain to be operated in the location estimation of the subscriber station in the wireless communication system;
Form a record, this record measure with the identifier of the location estimation of described subscriber station and described call event with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
In response to forming described record, store or send described record;
Wherein, described record associates described location estimation and one or more pilot signal strength and phase measurement; Wherein, one of at least related in the described pilot signal with the Traffic Channel that is present between described subscriber station and the base station; Wherein, described Traffic Channel be in forward traffic channel and the reverse traffic channel one of at least.
17. a method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Detect the generation of the location dependant services request event in the subscriber station of supporting Web;
In response to the generation that detects the described request incident, obtain to be operated in the location estimation of the subscriber station in the wireless communication system;
Form a record, this record measure with the identifier of the location estimation of described subscriber station and described request incident with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
In response to forming described record, store or send described record;
Wherein, described record associates described location estimation and one or more pilot signal strength and phase measurement; Wherein, one of at least related in the described pilot signal with the Traffic Channel that is present between described subscriber station and the base station; And wherein, described Traffic Channel be in forward traffic channel and the reverse traffic channel one of at least.
18. a method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Detect the generation of trigger event;
Take place in response to detecting described trigger event, obtain to be operated in the location estimation of the subscriber station in the wireless communication system;
Detect the overtime of timer;
In response to detecting described timer expired, obtain to be operated in the described location estimation of the subscriber station in the described wireless communication system;
Form a record, this record will one of at least associate one or more pilot signal strengths and phase measurement that described data representation is measured or obtained in response to obtaining described location estimation in the identifier of the location estimation of described subscriber station and described trigger event and the data; And
In response to forming described record, store or send described record.
19. method according to claim 18 is wherein, one of at least related with the Traffic Channel that is present between described subscriber station and the base station in the described pilot signal.
20. method according to claim 19, wherein, described Traffic Channel is a forward traffic channel.
21. method according to claim 19, wherein, described Traffic Channel is a reverse traffic channel.
22. method according to claim 1, wherein, described location estimation is determined by described subscriber station.
23. method according to claim 1, wherein, described location estimation is determined by other entities except that described subscriber station in the described system.
24. method according to claim 23, wherein, described other entities are position determination entity.
25. method according to claim 1, wherein, store the described described subscriber station this locality that is recorded in.
26. method according to claim 1 wherein, sends described record and it is stored in remote location in the described wireless communication system.
27. method according to claim 26, wherein, the described record that will be associated with described subscriber station position is stored in the database, and this database has been preserved the record that other subscriber station positions that other subscriber station of serving with described wireless communication system obtains are associated.
28. method according to claim 27, wherein, base station almanac information is relevant with described database.
29. a system that is used to obtain one or more wireless networks are used useful data, this system comprises:
Be used to detect the module of the generation of network event;
Be used for taking place in response to detecting described network event, acquisition is operated in the module of the location estimation of the subscriber station in the wireless communication system;
Be used to form the module of a record, this record measure with the identifier of the location estimation of described subscriber station and described network event with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
Be used for storing or send the module of described record in response to forming described record;
Wherein, described network event comprise in following one of at least:
Described subscriber station enters the overlay area, and described subscriber station leaves the overlay area, and, timer expiry when outside the overlay area of described subscriber station at wireless communication system.
30. system according to claim 29 realizes this system by subscriber station, perhaps with this system integration in subscriber station.
31. a wireless communication system that is used to obtain to the useful data of one or more network applications, this wireless communication system comprises:
One or more network entities, each network entity is configured to: (1) is in response to the generation that detects network event, obtain or obtained the location estimation of subscriber station, (2) form or formed a record, this record with the identifier of the location estimation of described subscriber station and described network event and in response to obtain or obtained the location estimation of subscriber station and measure or the data that obtain in associate one of at least, and store described record or be stored in the database in response to forming or formed described record (3);
Wherein, described network event comprises the handoff failure state, this wireless communication system also comprises and is used to preserve memory of data, the map of the failed handoff that this data representation is derived from described database and for each zone should the zone and the associated data that associates of one or more base station.
32. system according to claim 31, comprise one or more subscriber stations, described subscriber station is configured to: the data that visit is derived from described database, and, detect the roaming enter failed handoff after, utilize this data, force or forced the one or more base stations related to enter in the one or more tabulations that can be used for described subscriber station, switch supporting with this failed handoff.
33. system according to claim 31, also comprise one or more subscriber stations, described subscriber station is configured to: the data that visit is derived from described database, and detect the roaming enter failed handoff after, utilize this data, adjust or adjusted the one or more threshold values that can be used for described subscriber station, to support switching.
34. system according to claim 31, also comprise one or more subscriber stations, described subscriber station is configured to: the data that visit is derived from described database, and, detect the roaming enter failed handoff after, utilize this data, adjust or adjusted the one or more search times that can be used for described subscriber station, to support switching.
35. system according to claim 31, wherein, described network event comprises:
Subscriber station roaming enters coverage gap, roam out coverage gap or roam in coverage gap.
36. system according to claim 35 also comprises:
Be used to preserve the memory of data that derives from described database, these data comprise the map of coverage gap.
37. system according to claim 35 also comprises:
Be used to preserve the memory of data that derives from described database, the one or more gradient map of this data representation.
38. a method that is used to obtain one or more wireless networks are used useful data, this method comprise by or carry out following steps for each subscriber station in a plurality of subscriber stations of in wireless communication system, working:
Detect the generation of network event;
Take place in response to detecting described network event, obtain the location estimation of subscriber station;
Form a record, this record measure with the identifier of the location estimation of described subscriber station and described network event with in response to obtaining described location estimation or the data that obtain in associate one of at least; And
Described record is stored or has been stored in the database;
Wherein, described network event comprise following in one of at least:
Described subscriber station enters the overlay area, and described subscriber station leaves the overlay area, and, timer expiry when outside the overlay area of described subscriber station at wireless communication system.
39. according to the described method of claim 38, wherein, described network event comprises the handoff failure state.
40., also comprise according to the described method of claim 39:
From described database derived data, these data comprise the map of failed handoff and the associated data that each zone and one or more base stations are associated.
41., also comprise according to the described method of claim 40:
After subscriber station roaming enters failed handoff, force or forced the base station related to enter in the one or more tabulations that can be used for described subscriber station with described failed handoff, switch supporting.
42., also comprise according to the described method of claim 40:
After the subscriber station roaming enters failed handoff, adjust or adjusted the one or more threshold values that can be used for described subscriber station, to support switching.
43., also comprise according to the described method of claim 40:
After the subscriber station roaming enters failed handoff, adjust or adjusted the one or more search times that can be used for described subscriber station, to support switching.
44. according to the described method of claim 38, wherein, described network event comprises:
Roaming enters coverage gap, roams out coverage gap or roam in coverage gap.
45., also comprise according to the described method of claim 44:
Data from the map of described database induced representation coverage gap.
46., also comprise according to the described method of claim 44:
Data from the one or more gradient map of described database induced representation.
47., also comprise according to the described method of claim 45:
Described data are used for the network planning or optimize application.
48., also comprise according to the described method of claim 46:
Described data are used for the network planning or optimize application, or be used to verify the RF propagation model.
49. a method that is used to obtain one or more wireless networks are used useful data, this method comprises the execution following steps:
Record forms step, be used to form record, for each subscriber station in a plurality of subscriber stations, associate one of at least in the data that described record will be measured in response to the identifier of location estimation that detects the described subscriber station that network event takes place and obtain and described network event with in response to described location estimation or obtain;
Storing step is used for forming step in response to described record described record is stored in a database; And
Execution in step is utilized the data that derive from described database, carries out one or more network plannings, optimization, checking or operational applications;
Wherein, described network event comprise following in one of at least:
Described subscriber station enters the overlay area, and described subscriber station leaves the overlay area, and, timer expiry when outside the overlay area of described subscriber station at wireless communication system.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1326653A (en) * | 1998-11-17 | 2001-12-12 | 艾利森电话股份有限公司 | Method and arrangement for measuring and predicting of radio conditions in communications system |
| US20020069037A1 (en) * | 2000-09-01 | 2002-06-06 | Keith Hendrickson | System and method for measuring wireless device and network usage and performance metrics |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326653A (en) * | 1998-11-17 | 2001-12-12 | 艾利森电话股份有限公司 | Method and arrangement for measuring and predicting of radio conditions in communications system |
| US6466797B1 (en) * | 1998-11-17 | 2002-10-15 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods and arrangements relating to a radio communication system |
| US20020069037A1 (en) * | 2000-09-01 | 2002-06-06 | Keith Hendrickson | System and method for measuring wireless device and network usage and performance metrics |
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