CN104469841A - Method for reducing E-CID (Enhanced Cell-ID positioning method) positioning delay and signaling overheads - Google Patents
Method for reducing E-CID (Enhanced Cell-ID positioning method) positioning delay and signaling overheads Download PDFInfo
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- CN104469841A CN104469841A CN201410802499.8A CN201410802499A CN104469841A CN 104469841 A CN104469841 A CN 104469841A CN 201410802499 A CN201410802499 A CN 201410802499A CN 104469841 A CN104469841 A CN 104469841A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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Abstract
The invention provides a method for reducing E-CID (Enhanced Cell-ID positioning method) positioning delay and signaling overheads. The method aims to solve the problem about which scheme needs to be adopted to guarantee the smooth completing of the switching process and the positioning process if the E-CID is conducted on switched UE and to reduce the delay and signaling resources of the two processes as far as possible. According to the scheme, only switching based on an X2 port and an S1 port between base stations in an LTE system is concerned, for X2 switching and S1 switching between the base stations, E-CID measuring configuration information is carried in a switching request message, and after a target base station is switched, the positioning process of the UE can be completed continuously according to the E-CID measuring configuration information brought about by a source base station. According to the method, for the UE needing to be switched, due to the fact that the UE does not need to interact with the E-SMLC, the positioning delay and signaling resources can be reduced.
Description
Technical field
The present invention relates to moving communicating field.Specifically, the present invention relates to a kind of 3GPP long evolving system (LTE, Long Term Evolution) in mobile phone is being carried out to E-CID (Enhanced Cell-IDpositioning method, the Cell ID positioning method strengthened) when locating, reduce the method for location time delay and signaling consumption.
Background technology
CID locate mode is the location requirement of R8, and the E-CID localization method of its enhancement method has appearred in R9.Simply introduce CID localization method below, base station is receiving MME (Mobility Management Entity, mobile management entity) after the Location Report Control (comprise instruction enable position report) that sends, CGI and TAI of reporting subdistrict, and whether the Serving cell detecting UE changes.If when there occurs switching or the behavior of reconstruction between the different districts of UE in same base station, base station needs to send Location Report to MME, reports its new cell information, receives MME transmission Location Report Control instruction stop position and reports.E-CID localization method is mainly through obtaining one or more information such as community, AOA, Timing Advance Type1, TimingAdvance Type2, RSRP and RSRQ residing for UE in conjunction with the physical location of community, roughly estimate the position of UE, this positional precision is lower, at about 100 meters.E-CID to be measured initial request message (E-CID MEASUREMENT INITIATION REQUEST) and E-CID by location-server and measures termination command messages (MEASUREMENT TERMINATION COMMAND) signaling and be packaged into LPPa PDU by the instruction of E-CID location, is handed down to base station through MME by S1AP.Base station is measured initial failed message (E-CID MEASUREMENT INITIATION FAILURE) for E-CID location instruction execution result E-CID measurement termination command messages (E-CID MEASUREMENT INITIATION RESPONSE) or E-CID and is packaged into LPPa PDU, be uploaded to MME by S1AP, MME is transmitted to location-server.Base station is after corresponding UE starts the corresponding measurement of E-CID, when needing corresponding measurement result and reporting location-server, report measurement results E-CID MEASUREMENT REPORT is packaged into LPPa PDU, be uploaded to MME by S1AP message UPLINK UE ASSOCIATED LPPA TRANSPORT, MME is transmitted to location-server.After receiving the E-CID MEASUREMENT TERMINATIONCOMMAND order that E-SMLC sends, base station stops E-CID measurement to report, and E-CID positioning flow terminates.
The present invention proposes a kind of simple method, if for when initiating E-CID location to UE in handoff scenario, effectively can reduce location time delay and signal resource.
Summary of the invention
The technical problem to be solved in the present invention:
Problem to be solved by this invention is the UE for switching, if when will carry out E-CID to it, switching flow and positioning flow all can complete smoothly to take which kind of scheme to ensure, and reduce time delay and the signal resource of two flow processs as far as possible;
The present invention pays close attention to the switching based on X2 interface and S1 interface in LTE system between base station;
Solving this technical problem adopted technical scheme is:
Switch for the X2 between base station and S1 switching, carry E-CID measurement configuration information in handover request message, after target BS has switched, the E-CID measurement configuration information of coming according to source base station band has continued the positioning flow to UE;
Its concrete step is:
1) E-SMLC (Evolved Serving Mobile Location Centre, the Serving Mobile Location Center of evolution) sends E-CID to source base station and measures initial request message (E-CID MEASUREMENTINITIATION REQUEST);
2), after source base station receives E-CID measurement initial request message, preserve and measure configuration parameter to UE context;
3) source base station issues RRC reprovision request message (RRCConnectionReconfiguration) according to parameter request to UE, contains E-CID and measure configuration in this message;
4) UE has configured backward source base station reply RRC reprovision and has completed message (RRCConnectionReconfigurationComplete);
5) source base station receives after RRC reprovision completes message, replys E-CID successfully measure initial request response message (E-CID MEASUREMENT INITIATION RESPONSE) to E-SMLC;
6) UE measures, then to source base station reporting measurement reports (MeasurementReport) according to the measurement configuration of base station;
7) source base station is needs initiation X2 switching according to the switch decision that measurement report and algorithm are made, so send X2 handover request message (X2AP HANDOVER REQUEST) to object base station, in this message, comprise configuration parameter UE being carried out to E-CID measurement that source base station receives;
8) after target BS receives X2AP handover request message, if accept this handover request, then the E-CID measurement of preserving in message is configured in newly-generated UE context;
9) continue concrete X2 switching flow, X2 switching flow details does not describe;
10) UE is switched to after object base station completes, and can send RRC reprovision complete message (RRCConnectionReconfigurationComplete) to object base station;
11) RRC reallocation message (RRCConnectionReconfiguration) is initiated to UE in object base station, contains the E-CID be kept in UE context and measure configuration parameter in message;
12) UE measures configuration and completes backward object base station and report RRC reprovision to complete message (RRCConnectionReconfigurationComplete);
13) UE is according to measuring configuration requirement to object base station reporting measurement reports (MeasurementReport);
14), after base station receives the measurement report of UE, E-CID measurement report (E-CIDMEASUREMENT REPORT) is sent to E-SMLC;
15) if the 6th) step occurs in the 3rd) before step, then the 3rd) and the 4th) step do not need to perform, the 12nd) object base station receives after RRC reprovision completes message (RRCConnectionReconfigurationComplete) in step, supplement to reply E-CID to E-SMLC and successfully measure initial request response message (E-CID MEASUREMENT INITIATIONRESPONSE).
Described step 7) in, for the UE that have received E-CID measurement initial request, if this UE is about to be switched to other base stations, then in handover request message, carry E-CID measurement configuration information, like this after UE is switched to target BS, E-SMLC does not need to issue E-CID to UE again and measures configuration, as this reduced signal resource.
Described step 8) in, after have received handover request message, need to preserve E-CID measurement report to UE context.
Described step 11) in, when UE is switched to after target BS completes, if this UE needs to initiate E-CID measure configuration, then issue E-CID to UE and measure configuration, and need to reply E-CID initial measurement response message according to concrete scene to E-SMLC, the benefit brought in this step is, does not need by the time E-SMLC to issue E-CID and measures configuration, only needs the measurement configuration distributing that carries in handover request message to UE.
Described step 14) in, for the UE switched, if having received the E-CID measurement report that UE reports, then need to pass through E-SMLC.
For the UE needing to switch, owing to not needing to carry out alternately with E-SMLC, so just reduce location time delay and signal resource.
7th), in step, switching, so until the 9th if the switch decision that source base station is made is S1) X2 switching flow all replaces to S1 switching flow in step.
Technological merit of the present invention:
1) in step 7 as above) in, its advantage is, for the UE that have received E-CID measurement initial request, if this UE is about to be switched to other base stations, then in handover request message, carry E-CID measurement configuration information, like this after UE is switched to target BS, E-SMLC does not need to issue E-CID to UE again and measures configuration, as this reduced signal resource;
2) in step 8 as above) in, its advantage is, after have received handover request message, needs to preserve E-CID measurement report to UE context;
3) in step 11 as above) in, it is characterized in that, when UE is switched to after target BS completes, if this UE needs to initiate E-CID measure configuration, then issue E-CID to UE and measure configuration, and need to reply E-CID initial measurement response message according to concrete scene to E-SMLC, the benefit brought in this step is, do not need by the time E-SMLC to issue E-CID and measure configuration, only need the measurement configuration distributing that carries in handover request message to UE;
4) in step 14 as above) in, it is characterized in that, for the UE switched, if having received the E-CID measurement report that UE reports, then need to pass through E-SMLC;
Compared with prior art, the present invention, for the UE needing to switch, owing to not needing to carry out alternately with E-SMLC, so just can reduce location time delay and signal resource.
Accompanying drawing explanation
Fig. 1 is that the present invention is applied to the situation of the UE carrying out X2 switching being carried out to E-CID measurement and positioning.
Fig. 2 is that the present invention is applied to the situation of the UE carrying out S1 switching being carried out to E-CID measurement and positioning.
Embodiment
With reference to the accompanying drawings the specific embodiment of the present invention is elaborated:
The present invention can be applicable to two kinds of scenes as shown in Figure 1 and Figure 2, is now respectively described below it:
The flow process of the UE carrying out X2 switching being carried out to E-CID measurement and positioning that Fig. 1 describes, specific as follows:
1) E-SMLC sends E-CID to source base station and measures initial request message (E-CID MEASUREMENTINITIATION REQUEST);
2), after source base station receives E-CID measurement initial request message, preserve and measure configuration parameter to UE context;
3) source base station combines relevant E-CID Measurement Algorithm, issues RRC reprovision request message (RRCConnectionReconfiguration) to UE, contains E-CID and measure configuration in this message;
4) source base station receives after RRC reprovision completes message (RRCConnectionReconfigurationComplete), shows that E-CID measures configuration and completes;
5) source base station is replied E-CID to E-SMLC and is successfully measured initial request response message (E-CIDMEASUREMENT INITIATION RESPONSE);
6) source base station receives measurement report (MeasurementReport), and switch decision is switched to target BS by X2 for needs;
7) source base station sends handover request message (X2AP HANDOVER REQUEST) to target BS, and carries E-CID measurement configuration information in the message;
8) after object base station receives handover request message, if this handover request of access, then from message, obtain E-CID measurement configuration information, be kept in newly-built UE context;
9) X2AP switching flow is proceeded;
10) object base station receives RRC reprovision and completes message (RRCConnectionReconfigurationComplete), shows that switching completes;
11) object base station obtains E-CID measurement configuration information from UE context, and in conjunction with E-CID Measurement Algorithm, gives to UE by RRC reallocation message (RRCConnectionReconfiguration) by measurement configuration;
12) UE carries out E-CID and measures after configuration completes, and replys the RRC reallocation message (RRCConnectionReconfigurationComplete) configured to object base station;
13) object base station receives after RRC reprovision completes message, replys E-CID initial measurement response message (E-CID MEASUREMENT INITIATION RESPONSE) to E-SMLC;
14) object base station receives the E-CID measurement report (MeasurementReport) that UE reports;
15) E-CID measurement result is reported E-SMLC by message (E-CID MEASUREMENT REPORT) by object base station;
In this flow process, 3rd), 4), 5) step is optional step, if namely the 6th) measurement report in step reports base station prior to this three step, then this three step does not need to perform, in this case, optional step the 13rd) step must perform, otherwise the 13rd) step do not need to perform.
The flow process of the UE carrying out S1 switching being carried out to E-CID measurement and positioning that Fig. 2 describes, specific as follows:
1) E-SMLC sends E-CID by SLs interface to MME and measures initial request message (E-CIDMEASUREMENT INITIATION REQUEST);
2) MME forwards E-CID by S1 interface to source base station and measures initial request message;
3), after source base station receives E-CID measurement initial request message, preserve and measure configuration parameter to UE context;
4) source base station is in conjunction with E-CID Measurement Algorithm, gives to UE by RRC reallocation message (RRCConnectionReconfiguration) by measurement configuration;
5) source base station receives after RRC reprovision completes message (RRCConnectionReconfigurationComplete), shows that E-CID measures configuration and completes;
6) source base station is replied E-CID by S1 interface to MME and is measured initial communication message (E-CIDMEASUREMENT INITIATION RESPONSE);
7) MME replys E-CID by SLs interface to E-SMLC and measures initial communication message;
8) source base station receives measurement report (MeasurementReport), and switch decision is switched to target BS by S1 for needs;
9) source base station sends handoff requirement message (S1AP HANDOVER REQUIRED) to MME, and carries E-CID measurement configuration information in the message;
10), after MME receives handoff requirement message (S1AP HANDOVER REQUIRED), send handover request message (S1AP HANDOVER REQUEST) to object base station, in message, carry E-CID measurement configuration information;
11) after object base station receives handover request message, if this handover request of access, then from message, obtain E-CID measurement configuration information, be kept in newly-built UE context;
12) S1AP switching flow is proceeded;
13), after object base station receives the RRC reallocation message (RRCConnectionReconfigurationComplete) indicating and switched, show that S1 has switched;
14) object base station obtains E-CID measurement configuration information from UE context, and in conjunction with E-CID Measurement Algorithm, gives to UE by RRC reallocation message (RRCConnectionReconfiguration) by measurement configuration;
15) object base station receives E-CID and measures the RRC reprovision configured and complete message (RRCConnectionReconfigurationComplete);
16) object base station receives after RRC reprovision completes message, replys E-CID measure initial communication message (E-CID MEASUREMENT INITIATION RESPONSE) by S1 interface to MME;
17) MME replys E-CID by SLs interface to E-SMLC and measures initial communication message (E-CIDMEASUREMENT INITIATION RESPONSE);
18) object base station receives the E-CID measurement report (MeasurementReport) that UE reports;
19) E-CID measurement result (E-CID MEASUREMENT REPORT) will be sent to MME by S1 interface by object base station;
20) E-CID measurement result (E-CID MEASUREMENT REPORT) is transmitted to E-SMLC by SLs interface by MME;
In this flow process, 4th), 5), 6), 7) step is optional step, if namely the 8th) measurement report in step reports base station prior to this four step, then this four step does not need to perform, in this case, optional step the 16th), 17) step must perform, otherwise the 16th), 17) step do not need to perform.
Claims (6)
1. reduce the method that E-CID locates time delay and signaling consumption, it is characterized in that, comprise the following steps:
A) Serving Mobile Location Center E-SMLC-Evolved Serving MobileLocation Centre of evolution sends E-CID to source base station and measures initial request message-E-CIDMEASUREMENT INITIATION REQUEST;
B), after source base station receives E-CID measurement initial request message, preserve and measure configuration parameter to UE context;
C) source base station issues RRC reprovision request message-RRCConnectionReconfiguration according to parameter request to UE, contains E-CID and measure configuration in this message;
D) UE has configured backward source base station reply RRC reprovision and has completed message-RRCConnectionReconfigurationComplete;
E) source base station receives after RRC reprovision completes message, replys E-CID successfully measure initial request response message-E-CID MEASUREMENT INITIATION RESPONSE to E-SMLC;
F) UE measures, then to source base station reporting measurement reports-MeasurementReport according to the measurement configuration of base station;
G) source base station is needs initiation X2 switching according to the switch decision that measurement report and algorithm are made, so send X2 handover request message-X2AP HANDOVER REQUEST to object base station, in this message, comprise configuration parameter UE being carried out to E-CID measurement that source base station receives;
H) after target BS receives X2AP handover request message, if accept this handover request, then the E-CID measurement of preserving in message is configured in newly-generated UE context,
I) concrete X2 switching flow is continued;
J) UE is switched to after object base station completes, and sends RRC reprovision complete message to object base station---RRCConnectionReconfigurationComplete;
K) RRC reallocation message-RRCConnectionReconfiguration is initiated to UE in object base station, comprises the E-CID be kept in UE context and measure configuration parameter in message;
L) UE measures configuration and completes backward object base station and report RRC reprovision to complete message-RRCConnectionReconfigurationComplete;
M) UE is according to measuring configuration requirement to object base station reporting measurement reports-MeasurementReport;
N), after base station receives the measurement report of UE, E-CID measurement report-E-CIDMEASUREMENT REPORT is sent to E-SMLC;
If the f) step occur in the c) before step, then the c) and the d) step do not need to perform, the
L) in step, object base station receives after RRC reprovision completes message-RRCConnectionReconfigurationComplete, supplements to reply E-CID to E-SMLC and successfully measure initial request response message-E-CID MEASUREMENTINITIATION RESPONSE;
In described the g) step, switching, so until i-th if the switch decision that source base station is made is S1) X2 switching flow all replaces to S1 switching flow in step.
2. a kind of method reducing E-CID location time delay and signaling consumption according to claim 1, it is characterized in that: described step g) in, for the UE that have received E-CID measurement initial request, if this UE is about to be switched to other base stations, then in handover request message, carry E-CID measurement configuration information, like this after UE is switched to target BS, E-SMLC does not need to issue E-CID to UE again and measures configuration, as this reduced signal resource.
3. a kind of method reducing E-CID location time delay and signaling consumption according to claim 1, is characterized in that: described step h) in, after have received handover request message, need to preserve E-CID measurement report to UE context.
4. a kind of method reducing E-CID location time delay and signaling consumption according to claim 1, it is characterized in that: described step k) in, when UE is switched to after target BS completes, if this UE needs to initiate E-CID measure configuration, then issue E-CID to UE and measure configuration, and need to reply E-CID initial measurement response message according to concrete scene to E-SMLC, the benefit brought in this step is, do not need by the time E-SMLC to issue E-CID and measure configuration, only need the measurement configuration distributing that carries in handover request message to UE.
5. according to claim 1ly a kind ofly reduce the method that E-CID locates time delay and signaling consumption, it is characterized in that: described step n) in, for the UE switched, if having received the E-CID measurement report that UE reports, then need to pass through E-SMLC.
6. a kind of method reducing E-CID location time delay and signaling consumption according to claim 1, is characterized in that: the UE switched for needs, owing to not needing to carry out with E-SMLC alternately, so just reduces location time delay and signal resource.
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