CN102651917B - Method, device and system for establishing S1 signaling connection in evolution network - Google Patents
Method, device and system for establishing S1 signaling connection in evolution network Download PDFInfo
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Abstract
The invention discloses a method, a device and a system for establishing S1 signaling connection in an evolution network, belonging to the field of mobile communication. The method comprises the following steps that: a source-evolution base station eNodeB sends a switching request message carrying the original S1 signaling connection parameter information to a target eNodeB; user equipment (UE) enters a target cell, and the target eNodeB distributes a new S1 signaling connection parameter and sends a switching completion message carrying the S1 signaling connection parameter of the original eNodeB and the new S1signaling connection parameter to an evolved packet core (EPC); and the EPC stores the new S1 signaling connection parameter. According to the embodiment of the invention, the problem that the target eNodeB can not establish S1 signaling connection with the EPC after the UE is switched in the prior art is effectively solved.
Description
Technical field
The present invention relates to communication technical field, relate in particular to method, the Apparatus and system of in a kind of evolvement network, setting up the connection of S1 signaling.
Background technology
In SAE (System Architecture Evolution)/LTE (Long Term Evolution) network, S1 interface is eUTRAN (wireless access network of evolution) and CN Node (core net node, comprise MME/UPE) between interface, described interface is divided into chain of command interface S1-CP and interface in the user plane S1-UP.Wherein S1-CP is the interface between eUTRAN and MME (chain of command entity), and S1-UP is the interface between eUTRAN and UPE (user entity).
In SAE/LTE network, between eNodeB (base station of the evolution that eUTRAN comprises) and MME, the logic of two S1-CP applying portion inter-entity connects and is called the connection of S1 signaling, and S1-CP applying portion is S1 chain of command Application of Interface part agreement.In current SAE/LTE network, adopt SCTP (SCTP)/IP agreement to transmit the host-host protocol of the S1 interface control plane signaling of point-to-point.The protocol stack of S1-CP interface as shown in Figure 1.
ERANAP protocol entity shown in Fig. 1 is S1-CP applying portion protocol entity, for the application signaling on SCTP transmission link is properly routed in the entity of S1 chain of command Application of Interface part, need between transmission link is connected with S1 signaling, have an incidence relation one to one, at present optional correlating method has following two kinds:
Method 1: the identification information that adopts PPI (Payload Protocol Identifier, Payload protocol-identifier) the field transmission S1 signaling in Stream Control Transmission Protocol packet header to connect, performing step is as follows:
1) eNodeB or MME are in the time that the connection of NAS (Non-Access Stratum) signaling is set up, for each UE distributes a S1 signaling connection identifier (S1 signalling connection ID), which entity is initiated NAS signaling and is connected foundation, just by described entity partitioning S1 signaling connection identifier, then in the Article 1 NAS message on this S1 signaling connects, send this S1 signaling connection identifier to peer node, as S1 signaling connection identifier being included in S1 Application Part signaling message initial UE message Initial UE Message, pass to MME by eNodeB entity, eNodeB need to preserve this S1 signaling connection identifier with MME within S1 signaling is connected the cycle existing,
2) eNodeB is respectively newly-established S1 signaling with MME and is connected allocate communications example, and described S1 signaling connects by the coupling (SCTP Association) of two ends SCTP entity and SCTP and flows (SCTP Stream) and S1 signaling connection identifier unique identification;
3) in the time that the eRANAP of eNodeB communication entity need to send a message to the eRANAP communication entity of MME, eNodeB doses S1 signaling connection identifier in the PPI field of each SCTP data block, then by Stream Control Transmission Protocol, described message is sent to MME entity;
4) MME entity is properly routed to by this message the communication instance that this S1 signaling connects according to the PPI field in each SCTP data block.
Method 2: as shown in Figure 2, for eNodeB and MME distribute respectively a communication context mark (MME communication context identifier, eNB communication context identifier), eNodeB or MME entity carry corresponding communication context mark in every application layer signaling message, and opposite end application layer signaling entity is routed to signaling message in correct communication entity according to this communication context mark.
In SAE/LTE network, switch (Intra-LTE HO) in LTE at present, flow process as shown in Figure 3, comprises the steps:
Step 1: the UE context in the eNodeB of source includes roaming restricted information, source eNodeB entity is according to the measurement control procedure of described roaming restricted information configuration UE;
Described roaming restricted information provides in the time that connection is set up or when TA (tracking area) upgrades the last time, and described source eNodeB provides metrical information to UE, contributes to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of specifying;
Described UE can be according to the rule of certain appointment if the reporting measurement reports such as system information be to source eNodeB.
Step 3: RRM (RRM) information of the measurement report that source eNodeB reports according to described UE and source eNodeB, in the time that UE switches, determines UE to be switched to by target eNode B control Yi Ge community;
Step 4: source eNodeB sends handover request HANDOVER REQUEST message to target eNode B, carries target eNode B and switch information required while preparation in described message;
Described information comprises: UE is signaling context reference, Target Cell Identifier, RRC (radio resource control) context, the SAE bearer context at the EPC of S1 interface (block core of evolution) in the X2 of source eNodeB signaling context reference, UE.
Target eNode B connects with reference to coming addressing source eNodeB and EPC by the S1/X2 signaling of UE.Described SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required while preparation and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B configures the resource of described needs.
Step 5: target eNode B completes access control according to the described SAE bearer quality of service general picture receiving, to improve the possibility of handover success;
If target eNode B can meet the resource requirement of SAE carrying, distribute respective resources according to the described SAE bearer quality of service general picture of receiving, simultaneously a reserved C-RNTI;
Step 6: target eNode B sends handover request to source eNodeB and replys HANDOVER REQUEST ACKNOLEDGE message, source eNodeB receives described handover request and replys after HANDOVER REQUEST ACKNOLEDGE message, send switching command HANDOVER COMMAND message fixed to UE, and start beginning timer;
In described HANDOVER REQUEST ACKNOLEDGE message, comprise described newly assigned C-RNTI and other possible parameter, as: access parameter, set up RNL/TNL information that forwarding tunnel uses etc.;
In described HANDOVER COMMAND message, comprise: newly assigned C-RNTI, possible time started, SIB of target eNode B etc.
Step 7:UE receives after the switching command of source eNodeB entity transmission, starts to carry out handoff procedure;
Step 8:HANDOVER COMMAND starts after timer expiry, and UE and target eNode B complete synchronizing process, then obtains up Timing Advance;
Step 9: the up Timing Advance response of network to distribute;
Step 10: once successfully access Target cell, UE just sends and switched HANDOVER CONFIRM message to target eNode B, represents to have switched, and target eNode B checks whether the C-RNTI in message is that oneself distributes to confirm;
Step 11: target eNode B sends and switched HANDOVER COMPLETE message to EPC, notifies described in EPC changing district more of UE;
EPC by data route handoff to target eNode B, and the relevant user's face of source of release eNodeB and the resource of transport network layer;
Step 12:EPC sends to have switched to target eNode B and replys HO COMPLETE ACK message, confirms to have switched;
Step 13: target eNode B sends resource to source eNodeB and discharges RELEASE RESOURCE message, trigger source eNodeB releasing resource;
Step 14: receive that described resource discharges after RELEASE RESOURCE message, the resource of source eNodeB release and the context-sensitive Radio Resource of described UE and chain of command.
From above-mentioned narration, after not providing concrete switching in the handoff procedure of prior art and completing, S1 signaling establishment of connection scheme between target eNode B and EPC, therefore, cannot realize target eNodeB and the connection of EPC.
Summary of the invention
The embodiment of the present invention provides sets up method, the Apparatus and system that S1 signaling connects in a kind of evolvement network, solved in prior art, to have switched between rear target eNode B and EPC to set up the problem that S1 signaling is connected.
The embodiment of the present invention is achieved through the following technical solutions:
The embodiment of the present invention provides in a kind of evolvement network and sets up the method that S1 signaling connects, and comprising:
The base station eNodeB of source evolution sends the handover request message of carrying former S1 signaling connection parameter to target eNode B;
Behind UE target approach community, target eNode B distributes new S1 signaling to connect parameter, and sends the handoff completion message that carries described former S1 signaling connection parameter and described new S1 signaling connection parameter to the block core EPC of evolution;
Described EPC preserves described new S1 signaling and connects parameter.
The embodiment of the present invention provides a kind of base station of evolution, comprising:
S1 signaling connects parametric distribution module, is used to user equipment (UE) to distribute the S1 signaling of the base station eNodeB of this evolution and the block core EPC of evolution to be connected parameter;
ENodeB, in the time of the source eNodeB switching as UE, is further provided with:
S1 signaling connects parameter sending module one, is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC for sending described S1 signaling connection parametric distribution module; And/or,
Described eNodeB, in the time of the target eNode B of switching as UE, is further provided with:
S1 signaling connection identifier information sending module two, the target eNode B that is connected parameter and the distribution of described target eNode B for sending described source eNodeB with the former S1 signaling of EPC is connected parameter to EPC with the S1 signaling of EPC.
The embodiment of the present invention provides in a kind of evolvement network and sets up the system that S1 signaling connects, and comprising:
The base station eNodeB of at least two evolution, is provided with:
S1 signaling connects parametric distribution module, is used to user equipment (UE) to distribute this eNodeB to be connected parameter with the S1 signaling of the block core EPC of evolution;
Described eNodeB, in the time of the source eNodeB switching as UE, is further provided with:
S1 signaling connects parameter sending module one, is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC for sending described S1 signaling connection parametric distribution module;
Described eNodeB, in the time of the target eNode B of switching as UE, is further provided with:
S1 signaling connection identifier information sending module two, the target eNode B that is connected parameter and the distribution of described target eNode B for sending described source eNodeB with the former S1 signaling of EPC is connected parameter to EPC with the S1 signaling of EPC;
Described system also comprises the core EPC of evolution grouping, for connecting according to described S1 signaling the information updating route that parameter sending module two sends, and preserve described target eNode B and be connected parameter with the S1 signaling of EPC, and can search former communication entity, S1 signaling establishment of connection between realize target eNodeB and EPC according to described former S1 signaling connection parameter.
The technical scheme being provided by the invention described above embodiment can be found out, the embodiment of the present invention connects parameter by increase S1 signaling in the message of handoff procedure, as S1 signaling connection identifier or communication context mark, UE is being carried out after Intra-LTE switching, target eNode B can connect parameter according to described S1 signaling be set up S1 signaling with EPC and is connected, efficiently solve prior art UE carry out Intra-LTE switching afterwards target eNode B cannot set up the problem that S1 signaling is connected with EPC.
Brief description of the drawings
Fig. 1 is the protocol stack structure figure of prior art S1-CP interface;
Fig. 2 is that prior art communication context mark is used schematic diagram;
Fig. 3 is prior art switching flow figure;
Fig. 4 is embodiment of the present invention one flow chart;
Fig. 5 is embodiment mono-flow chart of embodiment of the present invention one;
Fig. 6 is embodiment bis-flow charts of embodiment of the present invention one;
Fig. 7 is embodiment of the present invention two flow charts;
Fig. 8 is embodiment mono-flow chart of embodiment of the present invention two;
Fig. 9 is embodiment bis-flow charts of embodiment of the present invention two;
Figure 10 is a kind of embodiment schematic diagram of system of the present invention.
Embodiment
The embodiment of the present invention connects parameter by carrying S1 signaling in some message in switching flow, as, S1 signaling connection identifier information or communication context identification information, realize having switched between rear target eNode B and EPC and set up the process that new S1 signaling is connected.
The scheme of embodiment of the present invention one is:
As shown in Figure 4, in existing switching flow, in the handover request HANDOVER REQUEST message sending to target eNode B at source eNodeB, increase current S1 signaling connection identifier information, be former S1 signaling connection identifier information, described current S1 signaling connection identifier information comprises: the S1 signaling connection identifier using before source eNodeB and EPC switch, optionally comprises SCTP coupling mark and SCTP traffic identifier simultaneously.
The switching sending to EPC in target eNode B completes in HANDOVER COMPLETE message, carry former S1 signaling connection identifier information and new S1 signaling connection identifier, in the SCTP message of carrying HAANDOVER COMPLETE message, use new S1 signaling connection identifier information simultaneously.Described new S1 signaling connection identifier information comprises: SCTP coupling mark (optional), SCTP traffic identifier (optional) and S1 signaling connection identifier.
The switching sending to EPC in target eNode B completes after HANDOVER COMPLETE message, EPC receives HANDOVER COMPLETE message, EPC entity sends to have switched to target eNode B and replys before HO COMPLETE ACK message, create new communication instance, preserve the new S1 signaling connection identifier information of carrying in described HANDOVER COMPLETE message simultaneously, EPC, according to the former communication instance of former S1 signaling connection identifier information searching, is connected thereby realize target eNodeB sets up S1 signaling with EPC.
Below in conjunction with accompanying drawing, the specific implementation process of described execution mode one is elaborated.
A kind of specific embodiment of execution mode one as shown in Figure 5, specifically comprises the steps:
Step 1: the UE context in the eNodeB of source includes roaming restricted information, source eNodeB entity is according to the measurement control procedure of described roaming restricted information configuration UE;
Described roaming restricted information provides in the time that connection is set up or when TA (tracking area) upgrades the last time, and described source eNodeB provides metrical information to UE, contributes to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of specifying;
Described UE can be according to the rule of certain appointment if the reporting measurement reports such as system information be to source eNodeB.
Step 3: RRM (RRM) information of the measurement report that source eNodeB reports according to described UE and source eNodeB, in the time that UE need to switch, determines UE to be switched to by target eNode B control Yi Ge community;
Step 4: source eNodeB sends handover request HANDOVER REQUEST message to target eNode B, carries target eNode B and switch information required while preparation in described message;
Described information comprises: UE is signaling context reference, Target Cell Identifier, RRC (radio resource control) context, SAE bearer context, the former S1 signaling connection identifier information at the EPC of S1 interface (block core of evolution) in the X2 of source eNodeB signaling context reference, UE.
Described former S1 signaling connection identifier information comprises: the S1 signaling connection identifier using before source eNodeB and EPC switch, optionally comprises SCTP coupling mark and SCTP traffic identifier simultaneously.
Target eNode B connects with reference to coming addressing source eNodeB and EPC by the S1/X2 signaling of UE.Described SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required while preparation and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B configures the resource of described needs.
Step 5: target eNode B completes access control according to the described SAE bearer quality of service general picture receiving, to improve the possibility of handover success;
If target eNode B can meet the resource requirement of SAE carrying, distribute respective resources according to the described SAE bearer quality of service general picture of receiving, simultaneously a reserved C-RNTI;
Step 6: target eNode B sends handover request to source eNodeB and replys HANDOVER REQUEST ACKNOLEDGE message, source eNodeB receives described handover request and replys after HANDOVER REQUEST ACKNOLEDGE message, send switching command HANDOVER COMMAND message fixed to UE, and start beginning timer;
In described HANDOVER REQUEST ACKNOLEDGE message, comprise described newly assigned C-RNTI and other possible parameter, as: access parameter, set up RNL/TNL information that forwarding tunnel uses etc.;
In described HANDOVER COMMAND message, comprise: newly assigned C-RNTI, possible time started, SIB of target eNode B etc.
Step 7:UE receives after the switching command of source eNodeB entity transmission, starts to carry out handoff procedure;
Step 8:HANDOVER COMMAND starts after timer expiry, and UE and target eNode B complete synchronizing process, then obtains up Timing Advance;
Step 9: the up Timing Advance response of network to distribute;
Step 10: once successfully access Target cell, UE just sends and switched HANDOVER CONFIRM message to target eNode B, represents to have switched, and target eNode B checks whether the C-RNTI in message is that oneself distributes to confirm;
Step 11: target eNode B sends and switched HANDOVER COMPLETE message to MME, changing district more of UE described in notice MME, and set up the connection of S1 signaling;
Described MME is an entity in EPC, is responsible for the mobile management of chain of command, comprises user's context and mobile status management, distributes temporary identity mark etc.;
Described target eNode B is distributed new S1 signaling connection identifier information, and described new S1 signaling connection identifier information comprises S1 signaling connection identifier, optionally comprises SCTP coupling mark and SCTP traffic identifier simultaneously;
Target eNode B is carried described new S1 signaling connection identifier information and former S1 signaling connection identifier information in described HANDOVER COMPLETE message;
UPE by data route handoff to target eNode B, and the relevant user's face of source of release eNodeB and the resource of transport network layer; Described UPE is an entity in EPC, is responsible for initiating paging for downlink data under idle condition, manages and preserves IP bearing parameter and the interior routing iinformation of network etc.
The specific implementation process of aforesaid operations comprises the steps:
Step 110, described MME receive after described HANDOVER COMPLETE message, create new communication instance, preserve the new S1 signaling connection identifier information of carrying in described HANDOVER COMPLETE message simultaneously, described MME is according to the former communication instance of former S1 signaling connection identifier information searching, this step is optional step, not shown;
Step 111, MME send and re-route request message to UPE, and request UPE carries out the routing update of user's face;
Step 112, UPE send and re-route response message to MME, represent that the routing update of user's face completes.
Step 12:MME sends to have switched to target eNode B and replys HO COMPLETE ACK message, confirms to have switched;
Step 13: target eNode B sends resource to source eNodeB and discharges RELEASE RESOURCE message, trigger source eNodeB releasing resource;
Step 14: receive that described resource discharges after RELEASE RESOURCE message, the resource of source eNodeB release and the context-sensitive Radio Resource of described UE and chain of command.
Above-described embodiment is by carrying former S1 signaling connection identifier information in the handover request message in handoff procedure, and in handoff completion message, carry the newly assigned S1 signaling of target eNode B connection identifier information and former S1 signaling connection identifier information, realize after UE is switched to Target cell and can set up EPC according to described former S1 signaling connection identifier information and new S1 signaling connection identifier information and be connected with the S1 signaling of target eNode B.
As shown in Figure 6, the difference of itself and above-described embodiment is step 11 to the another kind of specific embodiment of execution mode one of the present invention, and the present embodiment step 11 comprises:
Target eNode B sends and has switched HANDOVER COMPLETE message to UPE, changing district more of UE described in notice UPE, and set up the connection of S1 signaling;
Described UEP is an entity in EPC, is responsible for initiating paging for downlink data under idle condition, manages and preserves IP bearing parameter and the interior routing iinformation of network etc.
Described target eNode B is distributed new S1 signaling connection identifier information, and described new S1 signaling connection identifier information comprises S1 signaling connection identifier, optionally comprises SCTP coupling mark and SCTP traffic identifier simultaneously;
Target eNode B is carried described new S1 signaling connection identifier information and former S1 signaling connection identifier information in described HANDOVER COMPLETE message;
UPE by data route handoff to target eNode B, and the relevant user's face of source of release eNodeB and the resource of transport network layer;
The specific implementation process of aforesaid operations comprises the steps:
Step 110, described UPE receive after described HANDOVER COMPLETE message, send routing update request message to MME, notice MME user face route is upgraded, and carries described new S1 signaling connection identifier information and former S1 signaling connection identifier information in described message;
Step 111, MME receive after described routing update request message, create new communication instance, preserve the new S1 signaling connection identifier information of carrying in described message simultaneously, described MME is according to the former communication instance of former S1 signaling connection identifier information searching, this step is optional step, not shown;
After step 112, aforesaid operations complete, MME sends routing update response message to UPE.
Other operating procedures are same as the previously described embodiments.
The scheme of embodiment of the present invention two is:
As shown in Figure 7, in existing switching flow, in the HANDOVER REQUEST message sending to target eNode B at source eNodeB, increase former chain of command entity communication Context identifier (MME Communication Context Identifier), increase alternatively source eNodeB communication context mark (eNodeB Communication Context Identifier);
Target eNode B is distributed new eNodeB communication context mark (eNodeB Communication Context Identifier), the switching sending to EPC in target eNode B completes in HANDOVER COMPLETE message, carry described former chain of command entity communication Context identifier and described new eNodeB communication context mark, increase alternatively source eNodeB communication context mark;
The switching sending to EPC in target eNode B completes HANDOVER COMPLETE message, EPC receives after described HANDOVER COMPLETE message, EPC entity sends to have switched to target eNode B and replys before HO COMPLETE ACK message, EPC creates new communication instance, preserve the new eNodeB communication context mark of carrying in described HANDOVER COMPLETE message, described EPC searches former communication instance according to former chain of command entity communication Context identifier simultaneously;
EPC distributes new chain of command entity communication Context identifier (MME Communication Context Identifier), is carried on to send to the switching of target eNode B to complete to reply in HANDOVERCOMPLETE ACK message to be sent to target eNode B.
A kind of specific embodiment of described execution mode two as shown in Figure 8, comprises the steps:
Step 1: the UE context in the eNodeB of source includes roaming restricted information, source eNodeB entity is according to the measurement control procedure of described roaming restricted information configuration UE;
Described roaming restricted information provides in the time that connection is set up or when TA (tracking area) upgrades the last time, and described source eNodeB provides metrical information to UE, contributes to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of specifying;
Described U E can be according to the rule of certain appointment if the reporting measurement reports such as system information be to source eNodeB.
Step 3: RRM (RRM) information of the measurement report that source eNodeB reports according to described UE and source eNodeB, in the time that UE need to switch, determines UE to be switched to by target eNode B control Yi Ge community;
Step 4: source eNodeB sends handover request HANDOVER REQUEST message to target eNode B, carries target eNode B and switch information required while preparation in described message;
Described information comprises: UE is signaling context reference, Target Cell Identifier, RRC (radio resource control) context, SAE bearer context, the former chain of command entity communication Context identifier (MME Communication Context Identifier) at the EPC of S1 interface (block core of evolution) in the X2 of source eNodeB signaling context reference, UE, alternatively, comprise source eNodeB communication context mark (eNodeB Communication Context Identifier).
Target eNode B connects with reference to coming addressing source eNodeB and EPC by the S1/X2 signaling of UE.Described SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required while preparation and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B configures the resource of described needs.
Step 5: target eNode B completes access control according to the described SAE bearer quality of service general picture receiving, to improve the possibility of handover success;
If target eNode B can meet the resource requirement of SAE carrying, distribute respective resources according to the described SAE bearer quality of service general picture of receiving, simultaneously a reserved C-RNTI;
Step 6: target eNode B sends handover request to source eNodeB and replys HANDOVER REQUEST ACKNOLEDGE message, source eNodeB receives described handover request and replys after HANDOVER REQUEST ACKNOLEDGE message, send switching command HANDOVER COMMAND message fixed to UE, and start beginning timer;
In described HANDOVER REQUEST ACKNOLEDGE message, comprise described newly assigned C-RNTI and other possible parameter, as: access parameter, set up RNL/TNL information that forwarding tunnel uses etc.;
In described HANDOVER COMMAND message, comprise: newly assigned C-RNTI, possible time started, SIB of target eNode B etc.
Step 7:UE receives after the switching command of source eNodeB entity transmission, starts to carry out handoff procedure;
Step 8:HANDOVER COMMAND starts after timer expiry, and UE and target eNode B complete synchronizing process, then obtains up Timing Advance;
Step 9: the up Timing Advance response of network to distribute;
Step 10: once successfully access Target cell, UE just sends and switched HANDOVER CONFIRM message to target eNode B, represents to have switched, and target eNode B checks whether the C-RNTI in message is that oneself distributes to confirm;
Step 11: target eNode B sends and switched HANDOVER COMPLETE message to MME, changing district more of UE described in notice MME, and set up the connection of S1 signaling;
Described target eNode B is distributed new eNodeB communication context mark (eNodeB Communication Context Identifier); And in described HANDOVER COMPLETE message, carry described former chain of command entity communication Context identifier and described new eNodeB communication context mark, alternatively, carry source eNodeB communication context mark;
UPE by data route handoff to target eNode B, and the relevant user's face of source of release eNodeB and the resource of transport network layer;
The specific implementation process of aforesaid operations comprises the steps:
Step 110, described MME receive after described HANDOVER COMPLETE message, create new communication instance, preserve the new eNodeB communication context mark of carrying in described HANDOVER COMPLETE message simultaneously, described MME searches former communication instance according to described former chain of command entity communication Context identifier, this step is optional step, not shown;
Step 111, MME send and re-route request message to UPE, and request UPE carries out the routing update of user's face;
Step 112, UPE send and re-route response message to MME, represent that the routing update of user's face completes.
Step 12:MME sends to have switched to target eNode B and replys HO COMPLETE ACK message, confirms to have switched;
Alternatively, described MME can distribute new chain of command entity communication Context identifier, and described mark is carried in HO COMPLETE ACK message;
Step 13: target eNode B sends resource to source eNodeB and discharges RELEASE RESOURCE message, trigger source eNodeB releasing resource;
Step 14: receive that described resource discharges after RELEASE RESOURCE message, the resource of source eNodeB release and the context-sensitive Radio Resource of described UE and chain of command.
Above-described embodiment is by carrying former chain of command entity communication Context identifier in the handover request message in handoff procedure, and in handoff completion message, carry the newly assigned communication context of target eNode B mark and described former chain of command entity communication Context identifier, realized after UE is switched to Target cell can according to described former S1 signaling connection identifier information and newly S1 signaling connection identifier information set up EPC and be connected with the S1 signaling of Target cell.
As shown in Figure 9, the difference of the embodiment of itself and above-mentioned execution mode two comprises another specific embodiment of embodiment of the present invention two:
Step 11: target eNode B sends and switched HANDOVER COMPLETE message to UPE, changing district more of UE described in notice UPE, and set up the connection of S1 signaling;
Described target eNode B is distributed new eNodeB communication context mark (eNodeB Communication Context Identifier); And in described HANDOVER COMPLETE message, carry described former chain of command entity communication Context identifier and described new eNodeB communication context mark, alternatively, carry source eNodeB communication context mark;
UPE by data route handoff to target eNode B, and the relevant user's face of source of release eNodeB and the resource of transport network layer;
The specific implementation process of aforesaid operations comprises the steps:
Step 110, described UPE receive after described HANDOVER COMPLETE message, send routing update request message to MME, notice MME user face route is upgraded, and carries described former chain of command entity communication Context identifier and described new eNodeB communication context mark in described message;
Step 111, MME receive after described routing update request message, create new communication instance, preserve the new eNodeB communication context mark of carrying in described message simultaneously, described MME searches former communication instance according to former chain of command entity communication Context identifier, this step is optional step, not shown;
Step 112, MME distribute new chain of command entity communication Context identifier, and send to UPE the routing update response message that carries described newly assigned chain of command entity communication Context identifier.
Step 12:UPE sends to have switched to target eNode B and replys HO COMPLETE ACK message, confirms to have switched;
Alternatively, newly assigned chain of command entity communication Context identifier described in portability in described message;
Other operating procedures of the present embodiment are identical with above-described embodiment of execution mode two.
Further embodiment of this invention provides S1 signaling connection in a kind of evolvement network to set up system, and described system embodiment as shown in figure 10, comprising:
The base station eNodeB of at least two evolution, described eNodeB, in the time of the source eNodeB switching as U E, is provided with:
S1 signaling connects parametric distribution module, is used to UE to distribute this eNodeB to be connected parameter with the S1 signaling of EPC; Described S1 signaling connects parameter and comprises: S1 signaling connection identifier or MME/eNodeB communication context mark.
S1 signaling connects parameter sending module one, connects parameter to target eNode B for sending former S1 signaling, and sending S1 signaling connection parametric distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC; Described S1 signaling connects parameter and can adopt the PPI field in Stream Control Transmission Protocol packet header to be contained in S1 signaling connection identifier information, and is carried in handover request message and transmits; Described S1 signaling connection identifier information optionally comprises SCTP coupling mark and SCTP traffic identifier simultaneously; Or adopt MME communication context mark and eNodeB communication context to identify.
Described eNodeB, in the time of the target eNode B of switching as UE, is provided with:
S1 signaling connects parametric distribution module, is used to UE to distribute this eNodeB to be connected parameter with the S1 signaling of EPC;
S1 signaling connection identifier information sending module two, is connected parameter for transmission source eNodeB with the former S1 signaling of EPC and described target eNode B is connected parameter with the S1 signaling of EPC, sends former S1 signaling and connects parameter and new S1 signaling connection parameter; Described information can be carried in handoff completion message and send;
Described in the present embodiment, system also comprises the core EPC of evolution grouping, for connecting according to described S1 signaling the information updating route that parameter sending module two sends, and preserve described target eNode B and be connected parameter with the S1 signaling of EPC, and can connect parameter according to described former S1 signaling and search former communication entity.
Described EPC further comprises chain of command entity MME and user entity UPE, and the realization of described function is specifically as follows:
Preserve described target eNode B by described MME and be connected parameter with the S1 signaling of EPC, and search former communication entity according to described former S1 signaling connection parameter; Be that when MME communication context identifies and eNodeB communication context identifies, described MME is also for distributing new chain of command entity communication Context identifier when described S1 signaling connects parameter.
Routing update after having been switched by described UPE.
In sum, the embodiment of the present invention by increasing S1 signaling connection identifier or letter Context identifier in the message of handoff procedure, make UE after switching, target eNode B can be set up S1 signaling with EPC according to described mark and be connected, and efficiently solves prior art UE and switches the problem that rear target eNode B cannot connect with EPC.
The above; only for preferably embodiment of the present invention, but protection scope of the present invention is not limited to this, is anyly familiar with in technical scope that those skilled in the art disclose in the present invention; the variation that can expect easily or replacement, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (6)
1. in evolvement network, set up the method that S1 signaling connects, it is characterized in that, comprising:
The base station eNodeB of target eNode B reception sources evolution sends carries former chain of command entity communication Context identifier;
Behind UE target approach community, target eNode B is distributed new eNodeB communication context mark, and sends the handoff completion message that carries described former chain of command entity communication Context identifier and described new eNodeB communication context mark to the block core EPC of evolution; Described new eNodeB communication context mark is preserved by described EPC.
2. the method for claim 1, is characterized in that, described method further comprises:
Described target eNode B receives the switching that MME in described EPC sends and completes response message, and described switching completes the MME that response message carries in described EPC and distributes new MME communication context mark.
3. the method for claim 1, it is characterized in that, behind user's success target approach community, the handoff completion message that described former chain of command entity communication Context identifier and described new eNodeB communication context mark are carried in described transmission specifically comprises to the block core EPC of evolution:
Described target eNode B sends the handoff completion message that carries described former chain of command entity communication Context identifier and described new eNodeB communication context mark to the MME in EPC;
MME sends and re-routes request message to the UPE in EPC, and request UPE carries out the routing update of user's face;
UPE sends and re-routes response message to MME, represents that the routing update of user's face completes.
4. the method for claim 1, it is characterized in that, behind user's success target approach community, the handoff completion message that described former chain of command entity communication Context identifier and described new eNodeB communication context mark are carried in described transmission specifically comprises to the block core EPC of evolution:
Described target eNode B sends the handoff completion message that carries described former chain of command entity communication Context identifier and described new eNodeB communication context mark to the UPE in EPC;
Described UPE receives after described message, and the MME in EPC sends the routing update request message that carries described former chain of command entity communication Context identifier and described new eNodeB communication context mark, and notice MME user face route is upgraded;
MME receives after described message, sends routing update response message to UPE.
5. the method as described in claim 3 or 4, is characterized in that, the operation of described MME further comprises:
Described in receiving, carries described MME after the message of described former chain of command entity communication Context identifier and described new eNodeB communication context mark, preserve the described new eNodeB communication context mark of carrying in described message, and search former communication instance according to described former chain of command entity communication Context identifier.
6. in evolvement network, set up the device that S1 signaling connects, it is characterized in that, comprising: the base station eNodeB of reception sources evolution sends the device that carries former chain of command entity communication Context identifier;
Behind UE target approach community, distribute the device of new eNodeB communication context mark;
Transmission is carried the handoff completion message of described former chain of command entity communication Context identifier and described new eNodeB communication context mark to the device of the block core EPC of evolution, and described new eNodeB communication context mark is preserved by described EPC.
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