CN101521901A - Method, system and equipment for detecting blind areas - Google Patents
Method, system and equipment for detecting blind areas Download PDFInfo
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- CN101521901A CN101521901A CN200810009362A CN200810009362A CN101521901A CN 101521901 A CN101521901 A CN 101521901A CN 200810009362 A CN200810009362 A CN 200810009362A CN 200810009362 A CN200810009362 A CN 200810009362A CN 101521901 A CN101521901 A CN 101521901A
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Abstract
The invention discloses a method for detecting blind areas, comprising the following steps: a user terminal records the detection information within preset time, wherein the information comprises an identifier of a service base station; furthermore, the information can also comprises correlative information of neighbor and/or final positioning information of the user terminal; the user terminal is moved out of the blind area and obtains the current blind area information according to the measurement information which is obtained by detection when obtaining signals again; and after being confirmed by the base station, the user terminal reports the obtained blind area information to the network side so that the network side obtains the position of the blind area. The invention also discloses a system and equipment for detecting the blind areas. The method, the system and the equipment realize the positioning of the blind areas by the feedback of the user, provide an information reference for the subsequent base station allocated by network operators, avoid that the operator determines the blind area by road measurement, save the expense of the operators, and ensure the full cover of the network.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method, system and equipment that detects the blind area.
Background technology
In the middle of the network operation, occur can finding by the network operation service equipment through regular meeting as BTS hardware fault, transmission problem etc., find solution.But some does not cause the up-downgoing of serious call drop to disturb, cover problems such as unreasonable, in statistics, be difficult to be found, and these problems are and tight, the most direct problem of customer contact, to this, should be according to the data that collect, by analyzing network problem is made judgement accurately, simultaneously according to test result, to the improvement or the optimization proposition adjustment scheme of problem.In the prior art, can realize above-mentioned functions by road measuring device.
Road measuring device is for the network optimization, special soft, the hardware device of producing of planning, comprising data acquisition front, global position system GPS (Global Positioning System, global positioning system) and special test software etc.Present data acquisition front mostly is the testing mobile phone that there is special software inside, can rely on network to finish some specific functions, determines network busy district etc. as frequency locking, pressure switching, display networks; Also can not rely on network to finish some functions such as full frequency band frequency sweep and frequency-selecting point frequency sweep etc.; Simultaneously can also accept the instruction that computer is sent by the telecommunication cable between computer and the mobile phone, and with the transfer of data that collects to Computer Storage, further handle for computer.
Yet adopting the drive test mode to detect the blind area is to need human intervention, and expense is comparatively expensive, and the cost height do not conform to the demand of clothes operator to the network charges cost.In addition, often the call drop phenomenon is comparatively serious when carrying out drive test by the time, and has caused very big influence to the user, can not in time solve covering problem.Further, not every place all is fit to the method with drive test, so the drive test mode is subjected to certain region limitation.
At the problems referred to above of drive test technology, prior art has proposed another kind of blind area detection method, by MS (Mobile Station, travelling carriage) report measurement information; Or under state of activation, need not MS metrical information is provided, and by the whereabouts of Network records terminal, to the information search of special state, special state wherein comprises: the sub-district loses covering; Or re-selecting cell; Or the initiation service concurrence now loses covering under idle condition.
Yet, though this prior art scheme provides the examining report of overlay area, but it does not consider reporting subdistrict load at that time or the accumulation that has reported, as long as there is dead zone information just to report, can influence carrying out of other customer services of reporting subdistrict at last, serious may cause serious consequences such as sub-district paralysis.
Summary of the invention
The embodiment of the invention provides a kind of method, system and equipment that detects the blind area, measuring ability by user terminal positions the blind area and carry out the blind area testing that a mode that reports is correlated with, and realizes the blind area testing with more effective and low expense; And avoid under the overweight situation of load the blind area to detect that the strategy time-delay reports or refusing user's reports.
The embodiment of the invention provides a kind of method that detects the blind area, may further comprise the steps:
Detection information in the user terminal record Preset Time, described information comprise serving BS sign,
Described user terminal shifts out the blind area, detects the metrical information that obtains when recapturing signal and obtains present dead zone information;
Described user terminal is reported the described dead zone information that obtains after confirming by the base station, is made network side obtain the position of described blind area to network side.
The embodiment of the invention provides a kind of system that detects the blind area, comprising:
User terminal is used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information; And by after the network equipment affirmation, the described dead zone information that obtains is reported to network side, make network side obtain the position of described blind area;
Network equipment is used for carrying out blind area statistics and position calculation according to receiving through the user terminal report information of confirming, draws the positional information of blind area.
The embodiment of the invention provides a kind of user terminal, comprising:
The blind area detecting unit is used to judge whether described user terminal enters the blind area, or shifts out the blind area;
Information is obtained and buffer unit, is used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information;
Information reports the unit, after being used to obtain the affirmation of network equipment, the described dead zone information that obtains is reported to network side, makes network side obtain the position of described blind area.
The embodiment of the invention provides a kind of network equipment, comprising:
The report information receiving element is used to receive the report information that described user terminal sends;
Position calculation unit is used for carrying out blind area statistics and position calculation according to the user terminal report information of receiving, draws the positional information of blind area;
Judging unit is used to judge whether to carry out blind area detection information and reports, if do not need, communicates by letter normally; If need, send blind area detection information to described user terminal and report request message, carry the resource location of related content, distribution reporting message in the message.
In the embodiments of the invention, feedback by the user realizes the blind area location positioning, and for subsequent network operator cloth base station provides an information reference, has removed operator from and also will carry out a drive test and determine the blind area, save the expense of operator, guaranteed all standing problem of network.And avoid under the overweight situation of load the blind area to detect that the strategy time-delay reports or refusing user's reports.
Description of drawings
Fig. 1 is scene 1 schematic diagram of assisting to detect the blind area in the embodiment of the invention by terminal;
Fig. 2 is scene 2 schematic diagrames of assisting to detect the blind area in the embodiment of the invention by terminal;
Fig. 3 assists blind area testing process figure by terminal in the embodiment of the invention;
Fig. 4 is the flow chart that exists the MS under the situation of GPS/OTDOA to assist the blind area to detect in the embodiment of the invention one;
Fig. 5 is to be the CELL_ID localization method flow chart at center with RNC in the embodiment of the invention;
Fig. 6 is to be the CELL_ID localization method flow chart at center with SAS in the embodiment of the invention;
Fig. 7 is based on the OTDOA localization method flow chart of RNC in the embodiment of the invention;
Fig. 8 is based on the OTDOA localization method flow chart of SAS in the embodiment of the invention;
Fig. 9 is based on the GPS localization method flow chart of the network assistance of RNC in the embodiment of the invention;
Figure 10 is based on the GPS localization method flow chart of the network assistance of SAS in the embodiment of the invention;
Figure 11 does not have GPS/OTDOA in the embodiment of the invention and has only the user terminal under the situation of Cell_ID location assist to detect the blind area flow chart;
Figure 12 is that user terminal sends assistance detection dead zone information flow chart by Indication message in the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
The embodiment of the invention provides the method for MS auxiliary detection blind area under the benefit station scene among a kind of SON (Self-Organization Network, self-organizing network).Wherein the blind area refers to the zone that the user can't the calcaneus rete network communicates, and comprises can receiving the network information and can't the reporting information zone and can't learn the network information and zone that can't reporting information.
Wherein, SON mainly comprise the base station planning, build, automatic management, configuration and optimizing process in configuration and the escalation process, may comprise also simultaneously that network element state changes automatic management, configuration and the optimizing process that causes in the network, for example when network management alarm produces, network needs can Auto-Sensing, judgement and repair network.
For disturbed condition, the interference The classification basis parameter in the network is respectively that RSSI, SNR, I, INR are as follows:
At first, each definite threshold value of relevant parameter institute is as follows:
[RSSI
min]＝R；
[SNR
min]＝S；
[I
margin]＝I；
[INR
min]＝log
1010^(I/10)-1＝N；
Wherein, RSSI (Receive Signal Strength Indicator) is the indication of received signal intensity; SNR (Signal Noise Ratio) is a signal to noise ratio; INR (Interference-to-Noise Ratio) is an interference-to-noise ratio; I (Interference) is for disturbing;
Interference is classified as follows:
The acceptable disturbed condition:
RSSI>R，SNR>S，INR<N
The harmful interference condition:
RSSI>R，SNR>S，INR>N
The sex change disturbed condition:
RSSI>R，SNR<S，INR>N
According to different disturbed conditions, on handling, also there are differences.Such as disturbing, do not need to adjust and to continue communication for acceptable; For harmful interference, though the user can communicate by letter, there is the disturbed communication disruption that causes of risk meeting at any time, can identify other interference source situations by certain technology, and guarantee the solution that network signal disturbs by the coordination system; For the interference of sex change, the user can't communicate by the calcaneus rete network, but still can receive relevant information, and this moment, the user will be because of the interference interrupt communication if having no idea to eliminate disturbs.
The basis for estimation and the relevant information of above-mentioned blind area are as follows:
RSSI〉R, SNR＜S, INR〉N (band signal blind area, the i.e. interference of sex change) or RSSI＜R, SNR＜S, INR〉N (no signal blind area).
The embodiment of the invention is primarily aimed at the no signal blind area and handles, its main scene as depicted in figs. 1 and 2: a user terminal is in state of activation Active in certain sub-district, as position, ServingBS overlay area 1 among Fig. 1 or Fig. 2.
Step 101, user terminal in moving process through the blind area, zone as 2 places, position among Fig. 1 or Fig. 2, it can judge whether to enter the no signal blind area by RSSI, SNR and INR value, when user terminal does not receive any information of network in the blind area, detection information in the record Preset Time, described information comprises the sign of serving BS.
Step 102, when user terminal continues the mobile zone that network signal is arranged of having got back to again from the blind area, as position 3, Target BS overlay area among Fig. 1 or the position, Serving BS overlay area 3 among Fig. 2, the user terminal basis detects the metrical information that obtains and obtains present blind area relevant information when recapturing signal.
Step 103, user terminal is reported the blind area relevant information of obtaining through after the affirmation of network equipment to network side.Specifically comprise: user terminal is set up communication port with the network equipment of recapturing signal; Described user terminal sends indication information to network equipment, shows that described user terminal entered the blind area before, need report the blind area relevant information, and triggering system enters the blind area detection procedure stage; Network equipment judges whether to carry out blind area detection information and reports, if do not need, communicates by letter normally; If need, send blind area detection information to described user terminal and report request message, carry the resource location of related content, distribution reporting message in the message; The information that described user terminal need report described network equipment by response message all unifies to offer described network equipment; Described network equipment carries out blind area statistics and position calculation according to the report information of receiving, draws the positional information of blind area.
Step 104, network side are calculated the position of blind area by blind area related process module or equipment.
In the above process that dynamically moves, the node of user terminal and network side (as serving BS or target BS) exists a kind of communication mechanism or communication means, guarantees that the user has related resource to use when network side is reported dead zone information at needs.
A kind of detection blind area flow process such as Fig. 3 in the embodiment of the invention specifically may further comprise the steps:
Step 303 when MS moves out the blind area, when promptly the RSSI, the SNR that receive of MS is lower than some threshold values, can be judged and note some relevant informations of leaving the blind area by signal.
Step 302 in the foregoing description is the no signal blind area to be detected report process, and reality also can go to report there being signal blind zone to indicate with similar approach, such as judging RSSI〉R, SNR＜S, INR〉N;
Step 304 is adjusted into simultaneously: MS sends sign and the information that signal blind zone is arranged to network equipment after the process affirmation of network equipment, network equipment can be known the signal blind zone situation, according to certain hour internal feedback statistics, near network cell sub-district covering signal blind zone is arranged is adjusted.
In the embodiment of the invention one, have the user terminal under the situation of GPS or OTDOA (Observed Time Difference ofArrival, observe arrive in time difference) to assist to detect blind area embodiment, flow process as shown in Figure 4, concrete steps are as follows:
Step 401, MS carries out the initial access process of network by Serving BS, wherein consult MS and network side in the SBC flow process and whether support the GPS/OTDOA function, and can consult subscriber equipment and whether network side supports blind area measuring ability etc., by Serving BS attached on the network.
Step 402, MS is under state of activation, by the information that obtains in the service network the inside, as sign Serving BS ID of serving BS etc., can also comprise neighbours' relevant information that association (association) mode writes down, as identification list the list of the neighbour BSs of neighbours base station etc., and/or the last locating information of MS that obtains by navigation system etc.
Step 403, MS enters into the blind area, when promptly receiving RSSI, SNR and being lower than some threshold values, can judge and note some relevant informations of blind area by signal, as enters before the blind area last GPS/OTDOA locating information etc.
Step 404, after moving to the blind area for the user from Serving BS overlay area, move to the situation of TargetBS overlay area again, MS judges that by reception RSSI, SNR detected value the network that enters into signal has promptly withdrawed from the blind area, and MS is linked in the new network and has set up communication port; Then, MS initiates Location Request to network side, begins positioning flow subsequently and obtains the MS current position information; Information that MS will write down in the process of blind area and the positional information that obtains out the blind area are offered Target BS, the report information of receiving is issued the blind area detection module to Target BS or equipment carries out blind area statistics and position calculation with some algorithms (as GPS location algorithm, OTDOA location algorithm or Cell_ID location algorithm etc.), draws the positional information of blind area.
After moving to the blind area for the user from Serving BS overlay area, move to the situation of Serving BS overlay area again, MS obtains relevant information heel network side and rebulids communication port, MS sends locating request message and enters positioning flow to Serving BS by the communication port of setting up and obtains current location, subsequently by the mutual blind area of report flow process calcaneus rete network (as the Serving BS among Fig. 2) relevant information, as the GPS/OTDOA locating information of turnover blind area or Serving BS ID and neighbours BS ID tabulation or SNR/RSSI/CINR etc. before entering the blind area; Serving BS sends to special module or special equipment with the blind area relevant information of receiving, and adds up and calculate the position of blind area with some algorithms (as GPS location algorithm, OTDOA location algorithm or Cell_ID location algorithm etc.).
The embodiment of the invention can be applied to the 3GPP environment, also can be applied to IEEE 802.16 standard environments, and just the entity title in two kinds of applied environments is distinguished to some extent.In following examples, in the 3GPP environment, terminal is UE, and the base station is Node B+SRNC, and wherein, Node B is responsible for receiving functions such as transfer, and SRNC is responsible for handling functions such as scheduling; In IEEE 802.16 standards, terminal is MS, and the base station is BS.Though the entity title in two kinds of environment is different, actually carry out function class seemingly, therefore, following examples describe with the 3GPP environment.
Wherein, determine the position at object UE place based on the ID of the localization method of the Cell_ID cellular cell by obtaining object UE, and offer consumer positioning.Object UE is in different states, as CELL_DCH (under this state, distribute a DPCH in uplink and downlink to UE, can know the sub-district at UE place according to the current active set of UE, UE can use dedicated transmission channel, the combination of descending/up shared transmission channel or these transmission channels), CELL_FACH is (under this state, do not distribute dedicated transmission channel to UE, UE monitors a descending FACH channel continuously, the uplink common channel or the up shared transmission channel that have distributed an acquiescence for UE, enable to use in any time in access procedure, the position of UE is known to the UTRAN in cell-level, be specially the sub-district of reporting when UE is the last to initiate cell update) etc., send the request of LCS when core net after, SRNC will inquire about the UE attitude, if the UE unactivated state, SRNC will be to the UE paging, with the ID of the sub-district of determining the UE place.In order to improve precision, SRNC can also adopt RTT (Round Trip Time is used for FDD) or Rx time deviation (being used for TDD) method of measurement.When the UE soft changing state, may be in linking status with a plurality of sub-districts, determine the ID of sub-district usually by following several method: select the better quality of signal sub-district; The sub-district of selecting UE and NodeB link to use; Select the sub-district relevant recently with UE; The last use of selection UE, but also the sub-district of offhand switching; Choose the shortest sub-district of NodeB distance; Be chosen in and receive the sub-district that SRNC when request and UE are in linking status.The power level of the signal that also can receive based on the measurement of RTT or UE, NodeB or LMU the selection of sub-district, other also may be used to select the sub-district as IPDL (Idle Period Downlink) or S SDT (Site Selection DiversityTransmit).Behind the ID that determines good sub-district, also need the ID of sub-district is converted to geographical coordinate or coverage.With RNC be the center the CELL_ID localization method as shown in Figure 5, as SAS be the center the CELL_ID localization method as shown in Figure 6.
OTDOA (Observed Time Difference of Arrival) localization method, as shown in Figure 4, UE measures the down-bound pilot frequency signal of different base station, obtains TOA (the Time ofArrival of the descending pilot frequency of different base station, due in), promptly so-called pilot phase is measured.According to measurement result, and, adopt suitable location-estimation algorithm, thereby calculate the position of UE in conjunction with the coordinate of base station.Actual location-estimation algorithm need be considered the situation of location, a plurality of base stations (more than 3 or 3), so the algorithm more complicated.Generally speaking, the number of base stations that UE measures is many more, and certainty of measurement is high more, and the performance change of location is obvious more, and algorithm is also complicated more.Use this localization method, need the measured base station of UE to send down-bound pilot frequency signal simultaneously.Therefore, time synchronized must be realized in all base stations in the network, generally can realize the synchronous of base station by the GPS receiver being installed in the base station or being linked to time synchronization network.
OTDOA localization method based on SRNC as shown in Figure 7, may further comprise the steps:
Step 701, CN sends Location Request message to SRNC, the positional information of request target UE.SRNC will consider the stationkeeping ability of request and UTRAN and UE.
Step 702, SRNC sends OTDOA measurements request message to UE, request OTDOA localization method.At this moment, UE should be in the CELL_DCH state, if the location request message in the step 501 comprises the information of periodic location report, SRNC is with RQ cycle OTDOA measurement report.
Step 703, SRNC sends UE Rx-Tx timing Request message, request Rx-Tx time difference (being used for FDD) or TA (being used for TDD) or Tadv (being used for 1.28Mcps in TDD) information to UE.If the location request message in the step 501 comprises the information of periodic location report, SRNC is with RQ cycle OTDOA measurement report.This step is an optional step.
Step 704, UE sends OTDOA measurement response to SRNC, returns the OTDOA measurement result, and SRNC receives the OTDOA metrical information, and collects other computing informations.
Step 705, UE will send UE Rx-Tx timing Request message to SRNC, return Rx-Tx time difference (being used for FDD) or TA and Tadv (being used for TDD) information, and time corresponding be stabbed to SRNC.This step is an optional step.
Step 706, if the metrical information deficiency of OTDOA, or in order to improve measurement effect, SRNC will be to the TA (being used for TDD) of Serving Node B request RTT (being used for FDD) or Rx.In FDD, SRNC will ask RTD in relevant database.If constant, RTD may locally preserve; If variable, RTD must be updated when the TOD that OTDOA measures.
Step 707, Node B returns the timing offset (being used for TDD) of RTT (being used for FDD) or Rx and/or arrives angle (1.28Mcps in TDD) and gives SRNC.SRNC uses OTDOA to carry out the location, or measures speed.Calculating comprises the location conversion; Location estimation comprises the result of location and the precision that the result estimates; Optionally speed is estimated also may comprise precision.
Step 708, SRNC sends location estimation to CN, comprises localization method and positioning accuracy.If CN has required positioning accuracy, then also should comprise whether the meet the demands indication of precision of positioning accuracy.
Step 709 is if step 701,702 and 703 requires periodic report, repeating step 704～710.If only 701 require periodic report (CN requires periodic report) in steps, and 702 and 703 do not require periodic report (SRNC does not require periodic report), then repeats 702～708.
OTDOA localization method based on SAS as shown in Figure 8, may further comprise the steps:
Step 801, CN sends Location Request message to SRNC, the positional information of request target UE.SRNC will consider the stationkeeping ability of request and UTRAN and UE.
Step 802, SRNC will send PCAP Position Initiation Request message to SAS.This message comprises that the information of Location Request and the stationkeeping ability of periodic report message, CELL_ID and UE send out.
Step 803, SAS (Stand Alone Serving mobile location centre, Serving Mobile Location Center independently) sends PCAP Position Initiation Response message to SRNC, request OTDOA localization method may be asked RTT (being used for FDD) or TA (being used for TDD) or Tadv (being used for 1.28Mcps in TDD) simultaneously.This message may comprise periodic report message.
Step 804, SRNC sends OTDOA measurement request message to UE, request OTDOA localization method.At this moment, UE should be in the CELL_DCH state.If the location request message in the step 801 comprises the information of periodic location report, SRNC is with RQ cycle OTDOA measurement report.
Step 805, if SAS request Rx-Tx timing information, SRNC will ask the Rx-Tx time difference (being used for FDD) or TA (being used for TDD) or Tadv (being used for 1.28Mcps in TDD) information to UE.This request may comprise periodic report information.This step is an optional step.
Step 806, UE returns the OTDOA measurement report and gives SRNC.SRNC receives the OTDOA metrical information, and collects other computing informations.
Step 807, UE returns Rx-Tx time difference (being used for FDD) or TA (being used for TDD) or Tadv (being used for 1.28Mcps in TDD) information, and timestamp is given SRNC.This step is an optional step.
Step 808, SRNC transmits OTDOA measurement report information and gives SAS, and this information is included in the PCAPPosition Activation Response message, may also comprise RTT measurement report information.
Step 809, if the metrical information deficiency of OTDOA, or in order to improve measurement effect, the TA (being used for TDD) of SASServing Node B request RTT (being used for FDD) or Rx.This step is an optional step.
Step 810 in FDD, based on the input from LMU, calculates RTD and is kept among the SAS.This step is an optional step.
Step 811, Node B returns the timing offset (being used for TDD) of RTT (being used for FDD) or Rx and/or arrives angle (1.28Mcps in TDD) and gives SRNC.This step is an optional step.
Step 812, SRNC transmits CELL_ID and RTT (being used for FDD) or TA (being used for TDD) or arrives angle information (being used for 1.28Mcps in TDD) and gives SAS, and these message are included in the PCAPPosition Activation Response message.This step is an optional step.
Step 813, SAS carries out based on OTDOA or based on the location Calculation of CELL_ID.If step 801 does not require periodic report, SAS is included in locating information in the PCAP Position InitiationResponse message and is transmitted to SRNC.If step 801 requires periodic report, SAS is included in locating information in the PCAP Position Periodic Result message and is transmitted to SRNC.Calculating comprises the location conversion; Location estimation comprises the result of location and the precision that the result estimates; Optionally speed is estimated also may comprise precision.
Step 814, SRNC transmits location estimation and gives CN, and the information of Chuan Diing comprises localization method simultaneously, optionally speed is estimated.If CN requires positioning accuracy, then also should comprise whether the meet the demands indication of precision of positioning accuracy.
Step 815, if step 804 and step 805 require periodically positioning reporting, UE sends to SRNC with sending OTDOA measurement report or RTT (being used for FDD) or TA (being used for TDD) or arrival angle information (being used for 1.28Mcps in TDD) and timestamp per blanking time, and SRNC is included in these message in the PCAP Position Periodic Report message and sends to SAS.For each new location estimation, with repeating step 809-step 812, SAS will carry out based on OTDOA or based on the location estimation of CELL_ID, and new locating information is included in the PCAP Position Periodic Result message will be transmitted to SRNC.SRNC is transmitted to CN with the location estimation and the localization method of information with optional speed.May comprise the indication of the precision whether precision of location estimation meet the demands in the Location Response message.Step 815 repeats always, meets the demands or the stop position estimation up to the number of times of reporting.SAS may be included in last location estimation PCAP Position Initiation Response message and send to SRNC, and SRNC is transmitted to CN.
Step 816, if step 804 or step 805 do not require periodic location estimation, and step 802 require periodic location estimation, SAS may repeating step 803-step 814 go on foot, and reaches requirement or stops positioning flow up to the location number of times.When last location repeated to step 813, SAS may be included in last location estimation PCAP Position Initiation Response message and send to SRNC.
Based on the localization method of GPS, performing step is as follows: network side receives the supplementary of GPS; Network side sends to UE with the supplementary of GPS; UE obtains the supplementary of GPS, and calculates the accurate position of oneself; UE sends to core net with positional information.Be divided into supplementary mode and from two kinds of master modes based on the mode of the localization method of GPS.
Wherein, the locate mode of assistant GPS realizes most of function transplanting of traditional GPS receiver to network processing unit, need equipment such as antenna, RF unit and data processor.Network side sends a string extremely short supplementary to UE, comprises the inventory of time, may observe satellite, the Doppler parameter and the code phase search window of satellite.These parameters help built-in GPS module to reduce the acquisition time of gps signal.Auxiliary data comes from the pseudorange data that produces after the GPS of UE resume module, and sustainable several minutes.After receiving these pseudorange data, corresponding network processing unit or location-server can roughly estimate the position of UE, and network side can improve locating accuracy after increasing necessary correction.
Wherein, the locate mode of autonomous GPS, UE has comprised a Full Featured GPS receiver, has the repertoire of UE in the locate mode of UE assistant GPS, and has the computing function of satellite position and UE position.When position calculation began, the data that UE the needs mode more auxiliary than UE was many, and these data can continue to upgrade more than 4 hours or as required, generally include time, reference position, satellite ephemeris and time check parameter etc.If the precision that some application need is higher then must continue to send differential GPS (DGPS) signal to UE.The DGPS signal effectively, is the territorial scope that broad can be served in the center with a reference receiver in the territorial scope of non-constant width.Final position is calculated by UE oneself, if need, this locating information can send to any application.
GPS localization method based on the network assistance of RNC as shown in Figure 9, may further comprise the steps:
Step 901, the application program among the CN send Location Request message to SRNC, the positional information of request target UE.SRNC will consider the stationkeeping ability of request and UTRAN and UE.
Step 902, according to the ability of UE, network side sends the GPS that carries the GPS supplementary and measures request to UE.The GPS supplementary comprise reference time, the satellite of GPS ID, Doppler's power, search window and central point, ephemeris and clock correction, year calendar etc.According to the ability of UE, network side sends the GPS Location Request to UE.If comprise periodic report information in the Location Request message of step 901, SRNC is with the periodic request periodic report; Do not measure if UE has enough supplementarys to carry out, will ask more supplementary to SRNC; If, then change step 908 based on the localization method of UE.
Step 903, if based on the localization method of UE, before supplementary sends to UE, SRNC will ask that following message: LMU upgrades, RTT measures etc.LMU will return the time difference of NodeB and GPS and give SRNC; Node B returns RTT and measures to CRNC.If CRNC is not SRNC, then CRNC will be transmitted to SRNC to these information.
Step 904, network side is asked the measurement of gps satellite pseudo-range to UE, and asks other information.SRNC may ask SFN-SFN Observed Time Difference to measure and Rx-Tx TimingDifference information to UE.
Step 905, UE returns metrical information and other information of gps satellite pseudo-range and gives network.If desired, UE also will return SFN-SFN Observed Time Difference and measure and Rx-Tx TimingDifference information, and their timestamp is given SRNC.
Step 906, network side calculate location estimation and optionally speed estimation.
Step 907, if the information deficiency of location estimation, SRNC will restart new positioning flow from step 703.
Step 908, if based on the localization method of UE, UE will send location estimation and optionally speed estimate to SRNC.This message comprises positional information, optional rate information, precision and timestamp.
Step 909, in comprising the networking of SAS, SAS will transmit location estimation and give SRNC.
Step 910, SRNC transmits locating information and optional speed is estimated to CN.This message also comprises localization method.If CN requires the precision of location estimation, in Location Response message, will comprise the indication of the precision whether precision of location estimation meets the demands.
Step 911 is if RQ cycle report in step 901 and step 902 goes on foot repeating step 905-step 910.UE will send a new location estimation each blanking time.If CN is in the report of step 901 RQ cycle, and SRNC does not have the RQ cycle report in step 902, SRNC is with repeating step 902-step 910.SRNC will send a new location estimation each blanking time to CN, meets the requirements of the request number up to the number of position message.
The GPS localization method of the initialized network assistance of SAS as shown in figure 10, may further comprise the steps:
Step 1001, the application program among the CN send Location Request message to SRNC, the positional information of request target UE.SRNC will consider the stationkeeping ability of request and UTRAN and UE.
Step 1002, SRNC receives and also comprises periodic report message in the Location Request message and be included in CELL_ID among the PCAP Position Initiation Request and the stationkeeping ability of UE is sent out.
Step 1003, according to the ability of UE, SAS sends PCAP Position Activation Request message to SRNC, initiates the GPS location.This message comprises the GPS auxiliary data, may also comprise periodic report information.SAS may provide the auxiliary data of a plurality of GPS.
Step 1004, SRNC uses the RRC signaling to transmit the Location Request of SAS to UE.The RRC signaling may also comprise periodic report information.
Step 1005 is if UE is auxiliary GPS.SRNC is from the measurement of UE request gps satellite pseudo-range information and other information.SRNC may ask SFN-SFN Observed TimeDifference to measure and Rx-Tx Timing Difference information to UE.UE returns metrical information and other information of gps satellite pseudo-range and gives network.If desired, UE also will return SFN-SFN Observed TimeDifference and measure and Rx-Tx Timing Difference information, and their timestamp is given SRNC.
Step 1006, SRNC sends PCAP Position Activation Response message to SAS.This message comprises the information that step 805 comprises.
Step 1007, SAS calculates location estimation and optionally speed estimation.If do not carry periodic report in step 802, SAS will send PCAP Position Initiation Response message to SRNC.This message comprise location estimation and optionally speed estimate, may also comprise the precision whether precision of location method information and location estimation meets the demands.Otherwise SAS will send PCAP Position PeriodicResult message to SRNC.This message comprises location estimation, may also comprise the indication of the precision whether precision of location method information and location estimation meets the demands.
Step 1008, if based on the localization method of UE, UE estimate by RRC signaling restoring to normal position and optionally speed estimate to SRNC.SRNC estimates that location estimation and optional speed are included in the PCAP Position Activation Response message, and is transmitted to SAS.This message may also comprise the indication of the precision whether precision of location method information and location estimation meets the demands.
Step 1009, SAS may confirm the location estimation (as CELL_ID information) of step 808.If do not ask periodic report in step 1002, SAS will send PCAP Position Initiation Response message to SRNC.This message comprise location estimation and optionally speed estimate, may also comprise the precision whether precision of location method information and location estimation meets the demands.Otherwise SAS will send PCAP PositionPeriodic Result message to SRNC.This message comprises location estimation, may also comprise the indication of the precision whether precision of location method information and location estimation meets the demands.If the information deficiency of location estimation, SRNC will restart new positioning flow from step 1003.
Step 1010, SRNC transmits locating information and optional speed is estimated to CN.This message also comprises localization method.If CN requires the precision of location estimation, in Location Response message, will comprise the indication of the precision whether precision of location estimation meets the demands.
Step 1011, if in the report of step 1004 RQ cycle, each sends a GPS measurement report at interval UE.SRNC is included in measurement report in the PCAP Position Periodic Report message, and is transmitted to SAS.SAS may calculate location estimation and optionally speed estimate, and confirm location estimation that calculates and the location estimation of receiving from SRNC, and locating information is included in the PCAPPosition Periodic Result message is transmitted to SRNC.If can obtain location method information, SRNC can be transmitted to CN with location method information.If CN requires positioning accuracy, will comprise the indication of the precision whether precision of location estimation meets the demands in the LocationResponse message.Repeating step 1011 meets the requirements of number of times up to the number of times of the location estimation that sends.SAS may be included in last locating information in the PCAP Position Initiation Response message and send to SRNC, transmits last location estimation by SRNC and gives CN.
Step 1012 if do not require periodic report in step 1004, but requires periodic report in step 1002, and SAS is repeating step 1003-step 1010, meet the requirements of number of times up to the number of times of the location estimation that sends, or CN stops positioning flow.When the step 1008 of last request, SAS will comprise last positioning result and send to SRNC in PCAP Position Initiation Response message.
More than introduced three kinds of basic localization methods stipulating among the 3GPP, they can use under different situations, can use when positioning accuracy request is low based on the localization method of CELL_ID; The OTDOA method can be at positioning accuracy request higher and UE and network use when not having the GPS receiver apparatus; Localization method based on GPS is applicable to that then positioning accuracy request height and UE and network use when the GPS device is arranged.In addition, these several localization methods can mix use simultaneously, to remedy deficiency each other.For example, use localization method simultaneously, just can obtain better positioning effect in rural area and dense city based on CELL_ID and OTDOA.Network uses multiple localization method to provide positioning service for different application with different users simultaneously under different situations.
In the embodiment of the invention two, GPS/OTDOA and have only the user terminal in the absence of Cell_ID location to assist to detect blind area embodiment, as shown in figure 11, concrete steps are as follows:
Step 1101, MS carries out the initial access process of network by Serving BS, wherein consults can to consult in the flow process MS based on user capability and whether network supports the auxiliary blind area of user measuring ability etc., afterwards by Serving BS attached on the network.
Step 1102, MS obtains information by service network under state of activation, as sign Serving BS ID of serving BS etc., related (association) mode writes down neighbours' relevant information, as the identification list the list of the neighbourBS of neighbours base station etc., and buffer memory.
Step 1103, MS enters into the blind area, promptly the RSSI of Jie Shouing, SNR are lower than some threshold values, when INR is higher than certain threshold value, judge also some relevant informations of recorded and stored blind area by signal, as enter the blind area serving BS sign of buffer memory before, and neighbours' station list information at that time etc., and be associated with the blind area relevant information.
Step 1104 for situation as shown in Figure 1, after promptly the user moves to the blind area from Serving BS overlay area, moves to the situation of Target BS overlay area again; MS passes through RSSI, SNR, the INR detected value judges that the network that enters into signal promptly withdraws from the blind area, MS is linked in the new network and sets up communication port, then, send information that MS writes down and the information that obtains withdrawing from the blind area to network side in the process of blind area, promptly advance Serving BS ID and neighbours BS ID tabulation before the blind area, or RTD/SNR/RSSI/CINR etc., offer Target BS, Target BS issues blind area detection module or equipment with the report information of receiving and carries out blind area statistics and position calculation with some algorithms (as the Cell_ID location algorithm etc.), draws the positional information of blind area.
For situation as shown in Figure 2, after promptly the user moves to the blind area from Serving BS overlay area, move to the situation of Serving BS overlay area again.In the MS moving process, MS gets back to serving BS (as the Serving BS among Fig. 2) signal cover again, in this signal, MS obtains relevant information heel network side and sets up communication port, after this MS is linked into network side by this communication port and follows the mutual dead zone information of ServingBS (as the Serving BS among Fig. 2), promptly advance front and back, blind area RTD/SNR/RSSI/CINR etc., at last, Serving BS sends to dedicated module or Special Equipment with the blind area relevant information of receiving, and adds up and calculate the position of blind area with some algorithms (as Cell_ID location algorithm etc.).
Location algorithm in the embodiment of the invention two is identical with embodiment one, is not giving unnecessary details.
In the embodiment of the invention three, user terminal sends by Indication message and assists to detect dead zone information, and concrete flow process may further comprise the steps as shown in figure 12:
Step 1203, MS enters into the blind area, be that RSSI, SNR that MS receives are when being lower than some threshold values, can judge also some relevant informations of recorded and stored blind area by signal, as enter blind area serving BS sign and/or the neighbours' station list information at that time and/or the last locating information etc. of buffer memory before, and be associated with under this blind area sign relevant information.
Step 1204 for situation as shown in Figure 1, after promptly the user moves to the blind area from Serving BS overlay area, moves to the situation of Target BS overlay area again.At this moment, MS judges that by reception RSSI, SNR detected value the network that enters into signal has promptly withdrawed from the blind area, and MS is linked in the ServingBS network and sets up communication port; Then, MS can carry a bit indication information in other message that network side sends or specific messages, enters the blind area before this MS is described, need report the blind area relevant information now, and triggering system enters the blind area detection procedure stage; Afterwards, Target BS can be according to some information, and the dead zone information situation of having collected as the resource of present network etc. judge whether to carry out follow-up blind area and detect the information report flow.If do not need, the user communicates by letter behind the duration of regulation normally, and not so Target BS initiatively sends blind area detection information and reports request message, carries related content in the message, the parameter name that reports as needs, the resource location that distributes reporting message etc.Next, if the required content that reports of MS comprises the words of locating information, its MS and Target BS or other neighbours BS will carry out the flow process of a GPS/OTDOA location, after the positional information of acquisition MS, by response message the information that BS needs to report are all unified to offer BS in request message.Subsequently, the report information of receiving is issued the blind area detection module to Target BS or equipment carries out blind area statistics and position calculation with some algorithms (as GPS location algorithm, OTDOA location algorithm, Cell_ID location algorithm etc.), draws the positional information of blind area.For situation as shown in Figure 2, after promptly the user moves to the blind area from Serving BS overlay area, move to the situation of Serving BS overlay area again.In the MS moving process, MS gets back to serving BS (as the Serving BS among Fig. 2) signal cover, in this signal, it obtains relevant information heel network and sets up communication port, and after this it is linked into network and follows Serving BS (as the Serving BS among Fig. 2) interactive information by this communication port.Afterwards, MS can carry a bit indication information in other message that send to network side or specific messages, illustrates that this MS entered the blind area before, need report the blind area relevant information now, and triggering system enters the blind area detection procedure stage.Afterwards, Serving BS can be according to some information, and the dead zone information situation of having collected as the resource of present network etc. judge whether to carry out follow-up blind area and detect the information report flow.If do not need, the user communicates by letter behind the duration of regulation normally; Not so, Serving BS initiatively sends blind area detection information and reports request message, carry related content in the message, the parameter name (RSSI/SNR/CINR/RTD/RSSI/SNR/GPS/OTDOA information) that reports as needs, distribute the resource location of reporting message etc.Next, if the required content that reports of MS comprises the GPS/OTDOA locating information, MS and Serving BS or other neighbours BS will carry out the flow process of a location, after the positional information of acquisition MS, by response message the information that BS needs to report are all unified to offer BS in request message; Subsequently, the report information of receiving is issued the blind area detection module to Serving BS or equipment carries out blind area statistics and position calculation with some algorithms (as GPS location algorithm, OTDOA location algorithm, Cell_ID location algorithm etc.), draws the positional information of blind area.
The embodiment of the invention provides a kind of system that detects the blind area, comprising: user terminal, be used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information; And by after the network equipment affirmation, the described dead zone information that obtains is reported to network side, make network side obtain the position of described blind area; Network equipment is used for carrying out blind area statistics and position calculation according to receiving through the user terminal report information of confirming, draws the positional information of blind area.Described network equipment is target BS or serving BS.
Described user terminal comprises: the blind area detecting unit is used to judge whether described user terminal enters the blind area, or shifts out the blind area; Information is obtained and buffer unit, is used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information; Information reports the unit, after being used to obtain the affirmation of network equipment, the described dead zone information that obtains is reported to network side, makes network side obtain the position of described blind area.
Described user terminal also comprises: the indication transmitting element, be used for sending indication information to network equipment, and show that described user terminal entered the blind area before, need report the blind area relevant information, trigger described network equipment and enter the blind area detection procedure; Information receiving unit is used to receive the blind area detection information that described network equipment sends and reports request message, carries the resource location that the blind area reports required related content, distributes reporting message in the described message; Negotiation element is used for consulting whether all to support the auxiliary blind area of user measuring ability with subscriber equipment.
Described network equipment comprises: the report information receiving element is used to receive the report information that described user terminal sends; Position calculation unit is used for carrying out blind area statistics and position calculation according to the user terminal report information of receiving, draws the positional information of blind area; Judging unit is used to judge whether to carry out blind area detection information and reports, if do not need, communicates by letter normally; If need, send blind area detection information to described user terminal and report request message, carry the resource location of related content, distribution reporting message in the message; Negotiation element is used for consulting whether all to support the auxiliary blind area of user measuring ability with subscriber equipment.
In the embodiments of the invention, feedback by the user realizes the blind area location positioning, and for subsequent network operator cloth base station provides an information reference, has removed operator from and also will carry out a drive test and determine the blind area, save the expense of operator, guaranteed all standing problem of network.And avoid under the overweight situation of load the blind area to detect that the strategy time-delay reports or refusing user's reports.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential general hardware platform, can certainly pass through hardware, but the former is better execution mode under a lot of situation.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in the storage medium, comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of each embodiment of the present invention.
More than disclosed only be several specific embodiment of the present invention, still, the present invention is not limited thereto, any those skilled in the art can think variation all should fall into protection scope of the present invention.
Claims (13)
1, a kind of method that detects the blind area is characterized in that, may further comprise the steps:
Detection information in the user terminal record Preset Time, described information comprises the sign of serving BS;
Described user terminal shifts out the blind area, detects the metrical information that obtains when recapturing signal and obtains present dead zone information;
Described user terminal is reported the described dead zone information that obtains after confirming by the base station, is made network side obtain the position of described blind area to network side.
2, detect the method for blind area according to claim 1, it is characterized in that, described user terminal reports to network side that with the blind area relevant information of obtaining the position that makes network side calculate the blind area specifically comprises after confirming by the base station:
User terminal is set up communication port with the network equipment of recapturing signal;
Described user terminal sends indication information to network equipment, shows that described user terminal entered the blind area before, need report the blind area relevant information, and triggering system enters the blind area detection procedure stage;
Network equipment judges whether to carry out blind area detection information and reports, if do not need, communicates by letter normally; If need, send blind area detection information to described user terminal and report request message, carry the resource location of related content, distribution reporting message in the message;
Described user terminal is offered described network equipment by response message with the information unification that described network equipment need report, and described information comprises and enters neighbor information and locating information before the blind area;
Described network equipment carries out blind area statistics and position calculation according to the report information of receiving, draws the positional information of blind area.
3, detect the method for blind area according to claim 1, it is characterized in that, described user terminal reports to network side that with the blind area relevant information of obtaining the position that makes network side calculate the blind area specifically comprises after confirming by the base station:
User terminal is set up communication port with the network equipment of recapturing signal;
User terminal is initiated Location Request to described network equipment, obtains the user terminal current position information;
The positional information that the information that user terminal will write down before entering the blind area and obtaining shifts out the blind area reports described network equipment, and described network equipment carries out blind area statistics and position calculation according to the report information of receiving, draws the positional information of blind area.
4, detect the method for blind area according to claim 1, it is characterized in that, the deterministic process that described user terminal shifts out the blind area specifically comprises:
Judge whether to shift out described no signal blind area by received signal intensity indication RSSI, signal to noise ratio snr and interference-to-noise ratio INR.
5, detect the method for blind area according to claim 1, it is characterized in that, also comprise before the detection information in the described user terminal record Preset Time:
User terminal and network side are consulted both sides and whether are all supported the auxiliary blind area of user measuring ability.
6, as the method for detection blind area as described in claim 2 or 3, it is characterized in that the mode that described network side calculates the position of blind area comprises: GPS location, OTDOA location or Cell_ID location.
7, as the method for detection blind area as described in claim 2 or 3, it is characterized in that described network equipment is target BS or serving BS.
8, a kind of system that detects the blind area is characterized in that, comprising:
User terminal is used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information; And by after the network equipment affirmation, the described dead zone information that obtains is reported to network side, make network side obtain the position of described blind area;
Network equipment is used for carrying out blind area statistics and position calculation according to receiving through the user terminal report information of confirming, draws the positional information of blind area.
9, a kind of user terminal is characterized in that, comprising:
The blind area detecting unit is used to judge whether described user terminal enters the blind area, or shifts out the blind area;
Information is obtained and buffer unit, is used to write down the detection information in the Preset Time, and described information comprises the sign of serving BS; If shift out the blind area, detect the metrical information that obtains when recapturing signal and obtain present dead zone information;
Information reports the unit, after being used to obtain the affirmation of network equipment, the described dead zone information that obtains is reported to network side, makes network side obtain the position of described blind area.
10, as user terminal as described in the claim 9, it is characterized in that, also comprise:
The indication transmitting element is used for sending indication information to network equipment, shows that described user terminal entered the blind area before, need report the blind area relevant information, triggers described network equipment and enters the blind area detection procedure;
Information receiving unit is used to receive the blind area detection information that described network equipment sends and reports request message, carries the resource location that the blind area reports required related content, distributes reporting message in the described message.
11, as user terminal as described in the claim 9, it is characterized in that, also comprise:
Negotiation element is used for consulting whether all to support the auxiliary blind area of user measuring ability with network side.
12, a kind of network equipment is characterized in that, comprising:
The report information receiving element is used to receive the report information that described user terminal sends;
Position calculation unit is used for carrying out blind area statistics and position calculation according to the user terminal report information of receiving, draws the positional information of blind area;
Judging unit is used to judge whether to carry out blind area detection information and reports, if do not need, communicates by letter normally; If need, send blind area detection information to described user terminal and report request message, carry the resource location of related content, distribution reporting message in the message.
13, as network equipment as described in the claim 12, it is characterized in that, also comprise:
Negotiation element is used for consulting whether all to support the auxiliary blind area of user measuring ability with subscriber equipment.
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| RU2010139425/07A RU2466510C2 (en) | 2008-02-25 | 2009-02-24 | Method, system and device to detect blind area |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2009105991A1 (en) | 2009-09-03 |
| RU2466510C2 (en) | 2012-11-10 |
| RU2010139425A (en) | 2012-04-10 |
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