CN103634930A - Radio resource control connection and reestablishment method - Google Patents
Radio resource control connection and reestablishment method Download PDFInfo
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- CN103634930A CN103634930A CN201210300898.5A CN201210300898A CN103634930A CN 103634930 A CN103634930 A CN 103634930A CN 201210300898 A CN201210300898 A CN 201210300898A CN 103634930 A CN103634930 A CN 103634930A
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- base station
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a radio resource control (RRC) connection and reestablishment method. After a RRC connection and reestablishment request is received by a base station, if UE context information cannot be found locally, then in a cell which is reported to be reestablished, the physical cell identity (PCI) carried by the user equipment identity is analyzed, and the cell which triggers the reestablishment is found by matching PCI in a neighboring cell list and the user equipment context information is acquired from the base station of the cell, thereby initiating the RRC connection and reestablishment of the user equipment. According to application, RRC connection and reestablishment can also be realized when existing protocols do not support the operation, so that the RRC connection and reestablishment success rate can be improved, and the UE call drop rate can be reduced.
Description
Technical field
The application relates to mobile communication technology field, relates in particular to a kind of Radio Resource and controls (RRC) connection reconstruction method.
Background technology
When subscriber equipment (UE) is when Radio Resource is controlled idle (RRC_IDLE) state, upper strata request is set up when RRC connects can trigger RRC connection process of establishing, as responded beep-page message or UE, makes a call.UE in Radio Resource control connection (RRC_CONNECTED) state, Access Layer (AS, Access Stratum) safety is activated, due to reasons such as wireless environments, in the time of need to re-establishing RRC connection procedure, meet following arbitrary condition and can initiate RRC connection reconstruction process:
1) Radio Link Failure detected;
2) handoff failure (timer T304 is overtime);
3) E-UTRA side shifting failure;
4) bottom standard integrality is tested failure;
5) RRC connects reprovision failure.
If AS is not activated safely, UE can not initiate this process, and directly forwards RRC_IDLE state to.The process of RRC connection re-establishment is intended to rebuild RRC and connects, and comprises Signaling Radio Bearer 1(SRB1, Signalling Radio Bearer1) recovery of operation, and the reactivating of safety.
UE, at the initial phase of RRC connection reconstruction, can carry out community selection course according to the result of measurement report and community selection criterion, selects a good suitable community of channel quality to carry out RRC connection reconstruction.Agreement regulation, only, when related cell can have UE context, the general continental rise wireless access network of evolution (E-UTRAN, Evolved Universal Terrestrial Radio Access Network) just can be processed RRC connection reconstruction.When if current area does not have the context ，Gai community of this UE to report RRC connection reconstruction message, EUTRAN can reply RRC and connect refusal (Reject) message.
At UE, send in RRC connection reconstruction request (RRCConnectionReestablishmentRequest) message of EUTRAN side, need to carry user ID (UE-Identity) and rebuild reason (Reestablishment Cause) information.Under the situation of the reconstruction unsuccessfully causing in handoff failure and EUTRAN side shifting, agreement regulation, need to be by the Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI in UE-Identity, Cell Radio Network Temporary Identifier) and Physical Cell Identifier (PCI) be set to C-RNTI and the PCI that cell-of-origin is used, under other situation, C-RNTI and PCI are set to cause C-RNTI and the PCI that the community of process of reconstruction is used.
According to existing protocol description, the UE that is supported in stable state or switching state is meeting the reconstruction of following condition:
If UE, in stable state, supports the UE reconstruction that any community reports in the scope of base station, current place (eNB);
If UE in switching state, supports the reconstruction that all communities in the eNB at all communities of UE in the eNB of place, cell-of-origin and place, object community report.
Visible, in existing protocol, do not support UE under stable state except when the reconstruction that the UE in switching under state reports in other communities except cell-of-origin and eNBNei community, place, object community is not supported in the reconstruction that other eNB communities outside front place eNB report yet.Therefore in real network, there are a lot of reconstructions to be refused by network side, UE cutting off rate is increased.
Summary of the invention
The application provides a kind of radio resource control connection reestablishment method, and the situation of not supporting for above-mentioned existing protocol also can realize RRC connection reconstruction, thereby improves RRC connection reconstruction success rate, reduces UE call drop.
A kind of RRC connection reconstruction method that the embodiment of the present application provides, comprising:
A, the first base station receive the RRC connection reconstruction request that subscriber equipment sends, and the local contextual information that whether has this subscriber equipment of judgement, if so, performs step D, otherwise execution step B; In the request of described RRC connection reconstruction, carry customer equipment identification, described customer equipment identification comprises Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and Physical Cell Identifier PCI;
The PCI carrying in customer equipment identification is resolved in B, the first base station, by described PCI with report the Neighboring Cell List of the first community of reconstruction in PCI mate, find second community of triggering reconstruction; The C-RNTI that described customer equipment identification comprises and PCI are C-RNTI and the PCI of the second community;
C, the first base station send the first message of the C-RNTI and the PCI that carry the second community to second base station at the second place, community by X2 interface, and receive the second message from the contextual information that carries subscriber equipment of the second base station;
The RRC connection reconstruction of this subscriber equipment is initiated in D, the first base station according to the contextual information of subscriber equipment.
Preferably, before steps A, further comprise:
Subscriber equipment, according to measurement report and community selection criterion, selects the first community as the object community of RRC connection reconstruction;
Subscriber equipment sends the lead code of random access in uplink random access channel PRACH to first base station at the first place, community;
The first base station sends accidental access response message to subscriber equipment on downlink sharied signal channel.
Preferably, the content that described accidental access response message carries comprises: preamble index, Timing Advance, up protection interval and interim C-RNTI.
Preferably, step D comprises:
The first base station sends RRC connection reconstruction message to subscriber equipment, in described RRC connection reconstruction message, carries the new C-RNTI that distributes to this subscriber equipment;
UE replys RRC connection reconstruction success message to the first base station.
As can be seen from the above technical solutions, UE can select the good community of signal in adjacent area to carry out RRC connection reconstruction, if RRC connection reconstruction occurs in the community without the contextual eNB of this UE, eNB can obtain UE context to cell-of-origin eNB, thereby the reconstruction reporting can successfully be processed, improve RRC reconstruction success rate, reduce UE call drop.
Accompanying drawing explanation
Fig. 1 is the basic flow sheet of the RRC connection reconstruction method that proposes of the application;
A kind of RRC connection reconstruction flow chart that Fig. 2 provides for the embodiment of the present application.
Embodiment
The basic thought of the RRC connection reconstruction method that the application proposes is, when RRC connection reconstruction, to reporting the community of reconstruction not to be restricted, can be arbitrary cells; According to the criterion of the result of the measurement report of UE and community selection, RRC connection reconstruction is carried out in a choosing optimum community; When the community that reports RRC to rebuild can not find the context of UE, by X2 mouth, the contextual information of rebuilding the cell-of-origin UE needing is sent to the community that reports RRC to rebuild, thereby complete RRC process of reconstruction.
Fig. 1 is the basic flow sheet of the RRC connection reconstruction method that proposes of the application, comprises the steps:
Step 101: the first base station receives the RRC connection reconstruction request that subscriber equipment sends, the local contextual information that whether has this subscriber equipment of judgement, if so, performs step 104, otherwise performs step 102; In the request of described RRC connection reconstruction, carry customer equipment identification, described customer equipment identification comprises C-RNTI and PCI;
Step 102: the PCI carrying in customer equipment identification is resolved in the first base station, by described PCI with report the Neighboring Cell List of the first community of reconstruction in PCI mate, find second community of triggering reconstruction; The C-RNTI that described customer equipment identification comprises and PCI are C-RNTI and the PCI of the second community;
Step 103: the first base station sends the first message of the C-RNTI and the PCI that carry the second community to second base station at the second place, community by X2 interface, and receive the second message from the contextual information that carries subscriber equipment of the second base station;
Step 104: the RRC connection reconstruction of this subscriber equipment is initiated in the first base station according to the contextual information of subscriber equipment.
For making know-why, feature and the technique effect of present techniques scheme clearer, below in conjunction with specific embodiment, present techniques scheme is described in detail.
Base station is after receiving the request of RRC connection reconstruction, if can not find the contextual information of UE, in the community that reports reconstruction (object community), resolves the PCI carrying in UE-Identity, by PCI in coupling Neighboring Cell List, search and trigger the community (cell-of-origin) rebuilding.According to the network planning, the PCI value of adjacent area should be different, therefore, can find unique cell-of-origin.Object cell base station passes through X2 interface, to source cell base station, send RRC and rebuild resource information request message (RRCReestablishInfoReq), request source community rebuilds this UE the resource information needing and sends to object community, carries C-RNTI and the cell-of-origin sign (Source Cell ID) of cell-of-origin in this message.Receive after request cell-of-origin, according to C-RNTI, finds this UE context and reply RRC and rebuild resource information response message (RRCReestablishInfoRsp), and UE cell-of-origin resource information is sent to object community.
The form that RRC rebuilds resource information response message need not redefine, and can use the form of the handover request message (HANDOVER REQUEST) in existing < < 3GPP TS36.423 > > agreement.RRC in the embodiment of the present application rebuilds the concrete form of resource information request message (RRCReestablishInfoReq) and RRC reconstruction resource information response message (RRCReestablishInfoRsp) and distinguishes as shown in Table 1 and Table 2:
| Message body/group name claims (IE/Group Name) | There is (Presence) |
| Type of message (MessageType) | Necessary (M) |
| Cell-of-origin sign (Soturce Cell ID) | M |
| Cell Radio Network Temporary Identifier/Identity, Cell-RNTI (C-RNTI) | M |
Table 1RrcReestablishInfoReq message
| Message body/group name claims (IE/Group Name) | There is (Presence) |
| Type of message (Message Type) | Necessary (M) |
| Old base station-UE X2 application protocol identification (Old eNB UE X2AP ID) | M |
| Reason (Cause) | M |
| Object cell ID (Target Cell ID) | M |
| Globally unique MME sign (GUMMEI, Globally Unique MME Identifier) | M |
| UE context (UE Context Information) | |
| > MME UES1 application protocol identification (MME UE S1AP ID) | M |
| > UE security capabilities (UE Security Capabilities) | M |
| > AS security information (AS Security Information) | M |
| > the overall Maximum Bit Rate of UE (UE Aggregate Maximum Bit Rate) | M |
| >Subscriber Profile ID for RAT/Frequency priority | Optional (O) |
| > evolved general land RAB (E-RAB) list (E-RABs To Be Setup List) that will set up | |
| > > the E-RAB project (E-RABs To Be Setup Item) that will set up | |
| > > > E-RAB identifies (E-RAB ID) | M |
| > > > R-RAB level service mass parameter (E-RAB Level QoS Parameters) | M |
| > > > down link forward direction (DL Forwarding) | O |
| > > > up link GTP tunnel end points (UL GTP Tunnel Endpoint) | M |
| > RRC context (RRC Context) | M |
| > switch and limit list (Handover Restriction List) | O |
| > position message information (Location Reporting Information) | O |
| UE historical information (UE History Information) | M |
| Path tracing activates (Trace Activation) | O |
| Allow injection voice business continuity (SRVCC) operation (SRVCC Operation Possible) frequently | O |
Table 2RrcReestablishInfoRsp message
Like this at handoff failure or the UE under RRC_CONNECTED state, just need not be restricted to can only can obtain contextual community report rebuild message could success.
A kind of RRC connection reconstruction flow process that the embodiment of the present application provides as shown in Figure 2, comprises the steps:
Step 201:UE selects a suitable community as the object community of RRC connection reconstruction according to measurement report and community selection criterion.
Step 202:UE sends the lead code of random access in uplink random access channel PRACH to object cell base station.
Step 203: object cell base station sends accidental access response message to UE on downlink sharied signal channel (DL-SCH) channel.
This accidental access response message comprises following content: preamble index (Preamble index)+Timing Advance (TA)+up protection interval (UL Grant)+interim C-RNTI(Temporary C-RNTI).
Step 204:UE initiates the request of RRC connection reconstruction in object community.
This message comprises that following content: UEIdentity+ rebuilds reason.
Step 205: search UE context in object cell base station, if found, skip to step 208, otherwise perform step 206.
Step 206: object cell base station sends RRC to source cell base station and rebuilds resource information request message (RrcReestablishInfoReq), and request source cell base station sends RRC and rebuilds information needed.
This message comprises the C-RNTI of cell-of-origin sign and cell-of-origin.
Step 207: source cell base station is rebuild resource information response message (RrcReestablishInfoRsp) by RRC and RRC is rebuild to information needed sent to object cell base station.
Step 208: object cell base station is initiated RRC connection reconstruction message to UE, distributes a new C-RNTI to UE.
Step 209:UE replys RRC connection reconstruction success message to object cell base station.
The foregoing is only the application's preferred embodiment; not in order to limit the application's protection range; all within the spirit and principle of present techniques scheme, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the application's protection.
Claims (4)
1. a radio resource control RRC connection reconstruction method, is characterized in that, comprising:
A, the first base station receive the RRC connection reconstruction request that subscriber equipment sends, and the local contextual information that whether has this subscriber equipment of judgement, if so, performs step D, otherwise execution step B; In the request of described RRC connection reconstruction, carry customer equipment identification, described customer equipment identification comprises Cell Radio Network Temporary Identifier/Identity, Cell-RNTI C-RNTI and Physical Cell Identifier PCI;
The PCI carrying in customer equipment identification is resolved in B, the first base station, by described PCI with report the Neighboring Cell List of the first community of reconstruction in PCI mate, find second community of triggering reconstruction; The C-RNTI that described customer equipment identification comprises and PCI are C-RNTI and the PCI of the second community;
C, the first base station send the first message of the C-RNTI and the PCI that carry the second community to second base station at the second place, community by X2 interface, and receive the second message from the contextual information that carries subscriber equipment of the second base station;
The RRC connection reconstruction of this subscriber equipment is initiated in D, the first base station according to the contextual information of subscriber equipment.
2. method according to claim 1, is characterized in that, before steps A, further comprises:
Subscriber equipment, according to measurement report and community selection criterion, selects the first community as the object community of RRC connection reconstruction;
Subscriber equipment sends the lead code of random access in uplink random access channel PRACH to first base station at the first place, community;
The first base station sends accidental access response message to subscriber equipment on downlink sharied signal channel.
3. method according to claim 2, is characterized in that, the content that described accidental access response message carries comprises: preamble index, Timing Advance, up protection interval and interim C-RNTI.
4. method according to claim 1, is characterized in that, step D comprises:
The first base station sends RRC connection reconstruction message to subscriber equipment, in described RRC connection reconstruction message, carries the new C-RNTI that distributes to this subscriber equipment;
UE replys RRC connection reconstruction success message to the first base station.
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| CN106604337A (en) * | 2017-02-13 | 2017-04-26 | 中国联合网络通信集团有限公司 | RRC connection rebuilding method and system |
| CN110326321A (en) * | 2017-08-11 | 2019-10-11 | 华为技术有限公司 | A kind of transmission method and the network equipment |
| CN110475300A (en) * | 2018-05-10 | 2019-11-19 | 中兴通讯股份有限公司 | Communication connecting method, device, base station, terminal and computer readable storage medium |
| CN111405621A (en) * | 2019-01-03 | 2020-07-10 | 大唐移动通信设备有限公司 | Method and device for processing SRVCC switching abnormity |
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| CN112703770A (en) * | 2019-01-11 | 2021-04-23 | Oppo广东移动通信有限公司 | RRC connection reestablishment method and device, and network equipment |
| CN112703770B (en) * | 2019-01-11 | 2023-11-10 | Oppo广东移动通信有限公司 | RRC connection reestablishment method and device and network equipment |
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