CN102651917A - 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 and set up method, the Apparatus and system that the S1 signaling connects in a kind of evolvement network.
Background technology
In SAE (System Architecture Evolution)/LTE (Long Term Evolution) network; The S1 interface is eUTRAN (wireless access network of evolution) and CN Node (core net node; Comprise MME/UPE) between interface, said 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 the MME (chain of command entity), and S1-UP is the interface between eUTRAN and the UPE (user entity).
In the SAE/LTE network, between eNodeB (base station of the evolution that comprises among the eUTRAN) and MME, the logic of two S1-CP applying portion inter-entity connects and is called the connection of S1 signaling, and the S1-CP applying portion is a S1 chain of command Application of Interface part agreement.In present 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 is as shown in Figure 1.
ERANAP protocol entity shown in Fig. 1 is S1-CP applying portion protocol entity; For the application signaling on the SCTP transmission link is properly routed in the entity of S1 chain of command Application of Interface part; Need transmission link with have an incidence relation one to one between the S1 signaling is connected, optional correlating method has following two kinds at present:
Method 1: the identification information that adopts PPI (Payload Protocol Identifier, Payload protocol-identifier) the field transmission S1 signaling in the Stream Control Transmission Protocol packet header to connect, performing step is following:
1) eNodeB or MME are when 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 the NAS signaling and is connected foundation; Just distribute S1 signaling connection identifier, send this S1 signaling connection identifier to peer node in article one NAS message on this S1 signaling connects then, as S1 signaling connection identifier being included among the S1 Application Part signaling message initial UE message Initial UE Message by said entity; Pass to MME by the eNodeB entity, eNodeB need preserve this S1 signaling connection identifier with MME in the S1 signaling is connected the cycle that exists;
2) eNodeB is respectively newly-established S1 signaling with MME and is connected the allocate communications instance, and said S1 signaling connects by the coupling (SCTP Association) of two ends SCTP entity and flows (SCTP Stream) and S1 signaling connection identifier unique identification with SCTP;
3) when the eRANAP of eNodeB communication entity need 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, through Stream Control Transmission Protocol said message is sent to the MME entity then;
4) the MME entity is properly routed to the communication instance that this S1 signaling connects according to the PPI field in each SCTP data block with this message.
Method 2: as shown in Figure 2; For eNodeB and MME distribute a communication context sign (MME communication context identifier respectively; ENB communication context identifier); ENodeB or MME entity carry the corresponding communication Context identifier in every application layer signaling message, opposite end application layer signaling entity is routed to signaling message in the correct communication entity according to this communication context sign.
At present in the SAE/LTE network, LTE intra (Intra-LTE HO), flow process is as shown in Figure 3, comprises the steps:
Step 1: the UE context in the eNodeB of source includes the roaming restricted information, and source eNodeB entity is according to the measurement control procedure of said roaming restricted information configuration UE;
Said roaming restricted information provides when when connection is set up or the last time TA (tracking area) upgrades, and said source eNodeB provides metrical information to UE, helps to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of appointment;
Said UE can give source eNodeB according to reporting measurement reports such as the rule of certain appointment such as system informations.
Step 3: measurement report that source eNodeB reports according to said UE and RRM (RRM) information of source eNodeB, when UE switched, decision switched to UE in the sub-district by target eNode B control;
Step 4: source eNodeB sends handoff request HANDOVER REQUEST message to target eNode B, carries target eNode B in the said message and switches information required when preparing;
Said information comprises: the X2 signaling context reference of UE eNodeB in the source, UE are at signaling context reference, Target Cell Identifier, RRC (radio resource control) context, the SAE bearer context of the EPC of S1 interface (block core of evolution).
Target eNode B connects with reference to coming addressing source eNodeB and EPC with the S1/X2 signaling of UE.Said SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required when preparing and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B disposes the resource of said needs.
Step 5: target eNode B is accomplished access control according to the said SAE bearer quality of service general picture that receives, to improve the possibility of handover success;
If target eNode B can satisfy the resource requirement that SAE carries, then distribute respective resources according to the said SAE bearer quality of service general picture of receiving, reserve a C-RNTI simultaneously;
Step 6: target eNode B is sent handoff request to source eNodeB and is replied HANDOVER REQUEST ACKNOLEDGE message; Source eNodeB receives after said handoff request replys HANDOVER REQUEST ACKNOLEDGE message; It is fixed to UE to send switching command HANDOVER COMMAND message, and starts the beginning timer;
Comprise said newly assigned C-RNTI and other possible parameter in the said HANDOVER REQUEST ACKNOLEDGE message, as: RNL/TNL information of using in the tunnel or the like is transmitted in access parameter, foundation;
Comprise in the said HANDOVER COMMAND message: newly assigned C-RNTI, possible time started, SIB of target eNode B or the like.
Step 7:UE begins to carry out handoff procedure after receiving the switching command of source eNodeB entity transmission;
After step 8:HANDOVER COMMAND began timer expiry, UE and target eNode B were accomplished synchronizing process, obtain up Timing Advance then;
Step 9: the up Timing Advance response of network to distribute;
Step 10: in case successfully insert Target cell, UE just sends to switch to target eNode B and accomplishes HANDOVER CONFIRM message, and the expression switching is accomplished, and whether the C-RNTI in the target eNode B inspection message is to confirm own the distribution;
Step 11: target eNode B send to switch is accomplished HANDOVER COMPLETE message to EPC, and the said UE of notice EPC is changing district more;
EPC switches to target eNode B with the data route, and the relevant user plane of source of release eNodeB and the resource of transport network layer;
Step 12:EPC sends to switch to accomplish to target eNode B and replys HO COMPLETE ACK message, confirms to switch and accomplishes;
Step 13: target eNode B is sent resource to source eNodeB and is discharged RELEASE RESOURCE message, triggers source eNodeB and discharges resource;
Step 14: after receiving that said resource discharges RELEASE RESOURCE message, the resource of source eNodeB release and context-sensitive Radio Resource of said UE and chain of command.
Can know that by above-mentioned narration after not providing concrete switching in the handoff procedure of prior art and accomplishing, therefore S1 signaling establishment of connection scheme between target eNode B and EPC, can't realize being connected of target eNode B and EPC.
Summary of the invention
The embodiment of the invention provides sets up method, the Apparatus and system that the S1 signaling connects in a kind of evolvement network, solved to switch in the prior art can't set up the problem that the S1 signaling is connected between target eNode B and EPC after accomplishing.
The embodiment of the invention realizes through following technical scheme:
The embodiment of the invention provides sets up the method that the S1 signaling connects in a kind of evolvement network, comprising:
The base station eNodeB of source evolution is sent the handoff request message of carrying former S1 signaling connection parameter and is given target eNode B;
Behind the UE target approach sub-district, target eNode B distributes new S1 signaling to connect parameter, and sends the handoff completion message that carries said former S1 signaling connection parameter and said new S1 signaling connection parameter and give the block core EPC of evolution;
Said EPC preserves said new S1 signaling and connects parameter.
The embodiment of the invention provides a kind of base station of evolution, comprising:
The S1 signaling connects the parameter distribution module, is used to user equipment (UE) and distributes the base station eNodeB of this evolution to be connected parameter with the S1 signaling of the block core EPC of evolution;
ENodeB further is provided with when the source eNodeB that switches as UE:
The S1 signaling connects parameter sending module one, and being used to send said S1 signaling connection parameter distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC; And/or,
Said eNodeB further is provided with when the target eNode B of switching as UE:
S1 signaling connection identifier information sending module two is used to send said source eNodeB and is connected the target eNode B that parameter and said target eNode B distribute with the former S1 signaling of EPC and is connected parameter with the S1 signaling of EPC to EPC.
The embodiment of the invention provides sets up the system that the S1 signaling connects in a kind of evolvement network, comprising:
The base station eNodeB of at least two evolution is provided with:
The S1 signaling connects the parameter distribution module, is used to user equipment (UE) and distributes this eNodeB to be connected parameter with the S1 signaling of the block core EPC of evolution;
Said eNodeB further is provided with when the source eNodeB that switches as UE:
The S1 signaling connects parameter sending module one, and being used to send said S1 signaling connection parameter distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC;
Said eNodeB further is provided with when the target eNode B of switching as UE:
S1 signaling connection identifier information sending module two is used to send said source eNodeB and is connected the target eNode B that parameter and said target eNode B distribute with the former S1 signaling of EPC and is connected parameter with the S1 signaling of EPC to EPC;
Said system also comprises the core EPC that evolution is divided into groups; Be used for connecting the information updating route that parameter sending module two sends according to said S1 signaling; And preserve said target eNode B and be connected parameter with the S1 signaling of EPC; And can search former communication entity according to said former S1 signaling connection parameter, realize S1 signaling establishment of connection between target eNode B and the EPC.
Technical scheme by the invention described above embodiment provides can be found out; The embodiment of the invention connects parameter through in the message of handoff procedure, increasing the S1 signaling; Like S1 signaling connection identifier or communication context sign; Make UE carry out after Intra-LTE switches, target eNode B can connect parameter according to said S1 signaling set up the S1 signaling with EPC and is connected, efficiently solve prior art UE carry out the Intra-LTE switching afterwards target eNode B can't set up the problem that the S1 signaling is connected with EPC.
Description of drawings
Fig. 1 is the protocol stack structure figure of prior art S1-CP interface;
Fig. 2 uses sketch map for prior art communication context sign;
Fig. 3 is prior art switching flow figure;
Fig. 4 is embodiment of the present invention one flow chart;
Fig. 5 is embodiment one flow chart of embodiment of the present invention one;
Fig. 6 is embodiment two flow charts of embodiment of the present invention one;
Fig. 7 is embodiment of the present invention two flow charts;
Fig. 8 is embodiment one flow chart of embodiment of the present invention two;
Fig. 9 is embodiment two flow charts of embodiment of the present invention two;
Figure 10 is a kind of embodiment sketch map of system according to the invention.
Embodiment
The embodiment of the invention connects parameter through carrying the S1 signaling in some message in switching flow, as, S1 signaling connection identifier information or communication context identification information are realized switching and are set up the process that new S1 signaling is connected between target eNode B and EPC after accomplishing.
The scheme of embodiment of the present invention one is:
As shown in Figure 4; In existing switching flow; In the handoff request HANDOVER REQUEST message that target eNode B is sent, increase current S1 signaling connection identifier information, promptly former S1 signaling connection identifier information at source eNodeB; Said current S1 signaling connection identifier information comprises: the S1 signaling connection identifier that uses before source eNodeB and EPC switch, the simultaneously optional SCTP coupling that comprises identifies and the SCTP traffic identifier.
Accomplish in the HANDOVER COMPLETE message to the switching that EPC sends in target eNode B; 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.Said new S1 signaling connection identifier information comprises: SCTP coupling sign (optional), SCTP traffic identifier (optional) and S1 signaling connection identifier.
In target eNode B after HANDOVER COMPLETE message is accomplished in the switching that EPC sends; EPC receives HANDOVER COMPLETE message; The EPC entity is before HO COMPLETE ACK message is replied in target eNode B transmission switching completion; Create new communication instance; Preserve the new S1 signaling connection identifier information of carrying in the said HANDOVER COMPLETE message simultaneously, EPC is according to the former communication instance of former S1 signaling connection identifier information searching, thereby realizes that target eNode B sets up the S1 signaling with EPC and be connected.
Be elaborated below in conjunction with the concrete implementation procedure of accompanying drawing to said execution mode one.
A kind of specific embodiment of execution mode one is as shown in Figure 5, specifically comprises the steps:
Step 1: the UE context in the eNodeB of source includes the roaming restricted information, and source eNodeB entity is according to the measurement control procedure of said roaming restricted information configuration UE;
Said roaming restricted information provides when when connection is set up or the last time TA (tracking area) upgrades, and said source eNodeB provides metrical information to UE, helps to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of appointment;
Said UE can give source eNodeB according to reporting measurement reports such as the rule of certain appointment such as system informations.
Step 3: measurement report that source eNodeB reports according to said UE and RRM (RRM) information of source eNodeB, when UE need switch, decision switched to UE in the sub-district by target eNode B control;
Step 4: source eNodeB sends handoff request HANDOVER REQUEST message to target eNode B, carries target eNode B in the said message and switches information required when preparing;
Said information comprises: the X2 signaling context reference of UE eNodeB in the source, UE are in signaling context reference, Target Cell Identifier, RRC (radio resource control) context, SAE bearer context, the former S1 signaling connection identifier information of the EPC of S1 interface (block core of evolution).
Said former S1 signaling connection identifier information comprises: the S1 signaling connection identifier that uses before source eNodeB and EPC switch, the simultaneously optional SCTP coupling that comprises identifies and the SCTP traffic identifier.
Target eNode B connects with reference to coming addressing source eNodeB and EPC with the S1/X2 signaling of UE.Said SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required when preparing and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B disposes the resource of said needs.
Step 5: target eNode B is accomplished access control according to the said SAE bearer quality of service general picture that receives, to improve the possibility of handover success;
If target eNode B can satisfy the resource requirement that SAE carries, then distribute respective resources according to the said SAE bearer quality of service general picture of receiving, reserve a C-RNTI simultaneously;
Step 6: target eNode B is sent handoff request to source eNodeB and is replied HANDOVER REQUEST ACKNOLEDGE message; Source eNodeB receives after said handoff request replys HANDOVER REQUEST ACKNOLEDGE message; It is fixed to UE to send switching command HANDOVER COMMAND message, and starts the beginning timer;
Comprise said newly assigned C-RNTI and other possible parameter in the said HANDOVER REQUEST ACKNOLEDGE message, as: RNL/TNL information of using in the tunnel or the like is transmitted in access parameter, foundation;
Comprise in the said HANDOVER COMMAND message: newly assigned C-RNTI, possible time started, SIB of target eNode B or the like.
Step 7:UE begins to carry out handoff procedure after receiving the switching command of source eNodeB entity transmission;
After step 8:HANDOVER COMMAND began timer expiry, UE and target eNode B were accomplished synchronizing process, obtain up Timing Advance then;
Step 9: the up Timing Advance response of network to distribute;
Step 10: in case successfully insert Target cell, UE just sends to switch to target eNode B and accomplishes HANDOVER CONFIRM message, and the expression switching is accomplished, and whether the C-RNTI in the target eNode B inspection message is to confirm own the distribution;
Step 11: target eNode B send to switch is accomplished HANDOVER COMPLETE message to MME, and the said UE of notice MME is changing district more, and sets up the S1 signaling and connect;
Said MME is an entity among the EPC, is responsible for the mobile management of chain of command, comprises the management of user's context and mobile status, distributes temporary identity sign etc.;
Said target eNode B is distributed new S1 signaling connection identifier information, and said new S1 signaling connection identifier information comprises S1 signaling connection identifier, and the simultaneously optional SCTP coupling that comprises identifies and the SCTP traffic identifier;
Target eNode B is carried said new S1 signaling connection identifier information and former S1 signaling connection identifier information in said HANDOVER COMPLETE message;
UPE switches to target eNode B with the data route, and the relevant user plane of source of release eNodeB and the resource of transport network layer; Said UPE is an entity among the EPC, is responsible for initiating paging for downlink data under the idle condition, and IP bearing parameter and the interior routing iinformation of network etc. are preserved in management.
The concrete implementation procedure of aforesaid operations comprises the steps:
After step 110, said MME receive said HANDOVER COMPLETE message; Create new communication instance; Preserve the new S1 signaling connection identifier information of carrying in the said HANDOVER COMPLETE message simultaneously; Said MME is according to the former communication instance of former S1 signaling connection identifier information searching, and this step is optional step, and is not shown;
Step 111, MME send route request information again to UPE, and request UPE carries out the user plane routing update;
Step 112, UPE send route response message again to MME, and the routing update of expression user plane is accomplished.
Step 12:MME sends to switch to accomplish to target eNode B and replys HO COMPLETE ACK message, confirms to switch and accomplishes;
Step 13: target eNode B is sent resource to source eNodeB and is discharged RELEASE RESOURCE message, triggers source eNodeB and discharges resource;
Step 14: after receiving that said resource discharges RELEASE RESOURCE message, the resource of source eNodeB release and context-sensitive Radio Resource of said UE and chain of command.
The foregoing description is through carrying former S1 signaling connection identifier information in the handoff 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, realized that after UE switches to Target cell can set up EPC according to said former S1 signaling connection identifier information and new S1 signaling connection identifier information is connected with the S1 signaling of target eNode B.
The another kind of specific embodiment of execution mode one according to the invention is as shown in Figure 6, and the difference of itself and the foregoing description is step 11, and present embodiment step 11 comprises:
Target eNode B send to switch is accomplished HANDOVER COMPLETE message to UPE, and the said UE of notice UPE is changing district more, and sets up the S1 signaling and connect;
Said UEP is an entity among the EPC, is responsible for initiating paging for downlink data under the idle condition, and IP bearing parameter and the interior routing iinformation of network etc. are preserved in management.
Said target eNode B is distributed new S1 signaling connection identifier information, and said new S1 signaling connection identifier information comprises S1 signaling connection identifier, and the simultaneously optional SCTP coupling that comprises identifies and the SCTP traffic identifier;
Target eNode B is carried said new S1 signaling connection identifier information and former S1 signaling connection identifier information in said HANDOVER COMPLETE message;
UPE switches to target eNode B with the data route, and the relevant user plane of source of release eNodeB and the resource of transport network layer;
The concrete implementation procedure of aforesaid operations comprises the steps:
After step 110, said UPE receive said HANDOVER COMPLETE message; Send the routing update request message to MME; Notice MME user plane route is upgraded, and carries said new S1 signaling connection identifier information and former S1 signaling connection identifier information in the said message;
After step 111, MME receive said routing update request message; Create new communication instance, preserve the new S1 signaling connection identifier information of carrying in the said message simultaneously, said MME is according to the former communication instance of former S1 signaling connection identifier information searching; This step is optional step, and is not shown;
MME sent the routing update response message to UPE after step 112, aforesaid operations were accomplished.
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; At source eNodeB in the HANDOVER REQUEST message that target eNode B is sent; Increase former chain of command entity communication context sign (MME Communication Context Identifier), increase source eNodeB communication context sign (eNodeB Communication Context Identifier) alternatively;
Target eNode B is distributed new eNodeB communication context sign (eNodeB Communication Context Identifier); Accomplish in the HANDOVER COMPLETE message to the switching that EPC sends in target eNode B; Carry said former chain of command entity communication context sign and said new eNodeB communication context sign, increase source eNodeB communication context sign alternatively;
HANDOVER COMPLETE message is accomplished in switching in that target eNode B is sent to EPC; After EPC receives said HANDOVER COMPLETE message; The EPC entity is before HO COMPLETE ACK message is replied in target eNode B transmission switching completion; EPC creates new communication instance, preserves the new eNodeB communication context sign of carrying in the said HANDOVER COMPLETE message simultaneously, and said EPC searches former communication instance according to former chain of command entity communication context sign;
EPC distributes new chain of command entity communication context sign (MME Communication Context Identifier), is carried on the switching that sends to target eNode B and accomplishes to reply in the HANDOVERCOMPLETE ACK message and be sent to target eNode B.
A kind of specific embodiment of said execution mode two is as shown in Figure 8, comprises the steps:
Step 1: the UE context in the eNodeB of source includes the roaming restricted information, and source eNodeB entity is according to the measurement control procedure of said roaming restricted information configuration UE;
Said roaming restricted information provides when when connection is set up or the last time TA (tracking area) upgrades, and said source eNodeB provides metrical information to UE, helps to control the connection moving process of UE.
Step 2:UE triggers reporting of measurement report according to the rule of appointment;
Said U E can give source eNodeB according to reporting measurement reports such as the rule of certain appointment such as system informations.
Step 3: measurement report that source eNodeB reports according to said UE and RRM (RRM) information of source eNodeB, when UE need switch, decision switched to UE in the sub-district by target eNode B control;
Step 4: source eNodeB sends handoff request HANDOVER REQUEST message to target eNode B, carries target eNode B in the said message and switches information required when preparing;
Said information comprises: the X2 signaling context reference of UE eNodeB in the source, UE identify (MME Communication Context Identifier) at signaling context reference, Target Cell Identifier, RRC (radio resource control) context, SAE bearer context, the former chain of command entity communication context of the EPC of S1 interface (block core of evolution); Alternatively, comprise source eNodeB communication context sign (eNodeB Communication Context Identifier).
Target eNode B connects with reference to coming addressing source eNodeB and EPC with the S1/X2 signaling of UE.Said SAE bearer context comprises: target eNode B is switched the address information of wireless network layer required when preparing and transport network layer, the service quality general picture of SAE carrying and possible access layer configuration information, and target eNode B disposes the resource of said needs.
Step 5: target eNode B is accomplished access control according to the said SAE bearer quality of service general picture that receives, to improve the possibility of handover success;
If target eNode B can satisfy the resource requirement that SAE carries, then distribute respective resources according to the said SAE bearer quality of service general picture of receiving, reserve a C-RNTI simultaneously;
Step 6: target eNode B is sent handoff request to source eNodeB and is replied HANDOVER REQUEST ACKNOLEDGE message; Source eNodeB receives after said handoff request replys HANDOVER REQUEST ACKNOLEDGE message; It is fixed to UE to send switching command HANDOVER COMMAND message, and starts the beginning timer;
Comprise said newly assigned C-RNTI and other possible parameter in the said HANDOVER REQUEST ACKNOLEDGE message, as: RNL/TNL information of using in the tunnel or the like is transmitted in access parameter, foundation;
Comprise in the said HANDOVER COMMAND message: newly assigned C-RNTI, possible time started, SIB of target eNode B or the like.
Step 7:UE begins to carry out handoff procedure after receiving the switching command of source eNodeB entity transmission;
After step 8:HANDOVER COMMAND began timer expiry, UE and target eNode B were accomplished synchronizing process, obtain up Timing Advance then;
Step 9: the up Timing Advance response of network to distribute;
Step 10: in case successfully insert Target cell, UE just sends to switch to target eNode B and accomplishes HANDOVER CONFIRM message, and the expression switching is accomplished, and whether the C-RNTI in the target eNode B inspection message is to confirm own the distribution;
Step 11: target eNode B send to switch is accomplished HANDOVER COMPLETE message to MME, and the said UE of notice MME is changing district more, and sets up the S1 signaling and connect;
Said target eNode B is distributed new eNodeB communication context sign (eNodeB Communication Context Identifier); And in said HANDOVER COMPLETE message, carry said former chain of command entity communication context sign and said new eNodeB communication context sign, alternatively, carry source eNodeB communication context sign;
UPE switches to target eNode B with the data route, and the relevant user plane of source of release eNodeB and the resource of transport network layer;
The concrete implementation procedure of aforesaid operations comprises the steps:
After step 110, said MME receive said HANDOVER COMPLETE message; Create new communication instance; Preserve the new eNodeB communication context sign of carrying in the said HANDOVER COMPLETE message simultaneously; Said MME searches former communication instance according to said former chain of command entity communication context sign, and this step is optional step, and is not shown;
Step 111, MME send route request information again to UPE, and request UPE carries out the user plane routing update;
Step 112, UPE send route response message again to MME, and the routing update of expression user plane is accomplished.
Step 12:MME sends to switch to accomplish to target eNode B and replys HO COMPLETE ACK message, confirms to switch and accomplishes;
Alternatively, said MME can distribute new chain of command entity communication context sign, and said sign is carried in the HO COMPLETE ACK message;
Step 13: target eNode B is sent resource to source eNodeB and is discharged RELEASE RESOURCE message, triggers source eNodeB and discharges resource;
Step 14: after receiving that said resource discharges RELEASE RESOURCE message, the resource of source eNodeB release and context-sensitive Radio Resource of said UE and chain of command.
The foregoing description is through carrying former chain of command entity communication context sign in the handoff request message in handoff procedure; And in handoff completion message, carry the newly assigned communication context of target eNode B sign and identify with said former chain of command entity communication context, realized that after UE switches to Target cell can set up EPC according to said former S1 signaling connection identifier information and new S1 signaling connection identifier information is connected with the S1 signaling of Target cell.
Another specific embodiment of embodiment of the present invention two is as shown in Figure 9, and the difference of the embodiment of itself and above-mentioned execution mode two comprises:
Step 11: target eNode B send to switch is accomplished HANDOVER COMPLETE message to UPE, and the said UE of notice UPE is changing district more, and sets up the S1 signaling and connect;
Said target eNode B is distributed new eNodeB communication context sign (eNodeB Communication Context Identifier); And in said HANDOVER COMPLETE message, carry said former chain of command entity communication context sign and said new eNodeB communication context sign, alternatively, carry source eNodeB communication context sign;
UPE switches to target eNode B with the data route, and the relevant user plane of source of release eNodeB and the resource of transport network layer;
The concrete implementation procedure of aforesaid operations comprises the steps:
After step 110, said UPE receive said HANDOVER COMPLETE message; Send the routing update request message to MME; Notice MME user plane route is upgraded, and carries said former chain of command entity communication context sign and said new eNodeB communication context sign in the said message;
After step 111, MME receive said routing update request message; Create new communication instance; Preserve the new eNodeB communication context sign of carrying in the said message simultaneously; Said MME searches former communication instance according to former chain of command entity communication context sign, and this step is optional step, and is not shown;
Step 112, MME distribute new chain of command entity communication context sign, and send the routing update response message that carries said newly assigned chain of command entity communication context sign to UPE.
Step 12:UPE sends to switch to accomplish to target eNode B and replys HO COMPLETE ACK message, confirms to switch and accomplishes;
Alternatively, the said newly assigned chain of command entity communication context sign of portability in the said message;
Other operating procedures of present embodiment are identical with the foregoing description of execution mode two.
Further embodiment of this invention provides in a kind of evolvement network the S1 signaling to connect and sets up system, and said system embodiment is shown in figure 10, comprising:
The base station eNodeB of at least two evolution, said eNodeB is provided with when the source eNodeB that switches as U E:
The S1 signaling connects the parameter distribution module, is used to UE and distributes this eNodeB to be connected parameter with the S1 signaling of EPC; Said S1 signaling connects parameter and comprises: S1 signaling connection identifier or MME/eNodeB communication context sign.
S1 signaling connection parameter sending module one is used to send former S1 signaling and connects parameter to target eNode B, and promptly sending S1 signaling connection parameter distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC; Said S1 signaling connects parameter and can adopt the PPI field in the Stream Control Transmission Protocol packet header to be contained in the S1 signaling connection identifier information, and is carried in the handoff request message and transmits; Optional SCTP coupling sign and the SCTP traffic identifier of comprising during said S1 signaling connection identifier information of same; Or adopt MME communication context sign and eNodeB communication context to identify.
Said eNodeB is provided with when the target eNode B of switching as UE:
The S1 signaling connects the parameter distribution module, is used to UE and distributes this eNodeB to be connected parameter with the S1 signaling of EPC;
S1 signaling connection identifier information sending module two is used to send that source eNodeB is connected parameter with the former S1 signaling of EPC and said target eNode B is connected parameter with the S1 signaling of EPC, sends promptly that former S1 signaling connects parameter and new S1 signaling connects parameter; Said information can be carried in the handoff completion message and send;
The said system of present embodiment also comprises the core EPC that evolution is divided into groups; Be used for connecting the information updating route that parameter sending module two sends according to said S1 signaling; And preserve said target eNode B and be connected parameter, and can connect parameter according to said former S1 signaling and search former communication entity with the S1 signaling of EPC.
Said EPC further comprises chain of command entity MME and user entity UPE, the realization of said function specifically can for:
Preserve said target eNode B by said MME and be connected parameter, and search former communication entity according to said former S1 signaling connection parameter with the S1 signaling of EPC; When said S1 signaling connected parameter for MME communication context sign and eNodeB communication context sign, said MME also was used to distribute new chain of command entity communication context sign.
Switch the routing update after the completion by said UPE.
In sum; The embodiment of the invention is through 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 the S1 signaling with EPC according to said sign and be connected, and efficiently solves prior art UE and switches the problem that the back target eNode B can't connect with EPC.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within 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 (13)
1. set up the method that the S1 signaling connects in an evolvement network, it is characterized in that, comprising:
The base station eNodeB of source evolution is sent the handoff request message of carrying former S1 signaling connection parameter and is given target eNode B;
Behind the UE target approach sub-district, target eNode B distributes new S1 signaling to connect parameter, and sends the handoff completion message that carries said former S1 signaling connection parameter and said new S1 signaling connection parameter and give the block core EPC of evolution;
Said EPC preserves said new S1 signaling and connects parameter.
2. the method for claim 1 is characterized in that, said S1 signaling connects parameter and comprises:
S1 signaling connection identifier information; Or, the communication context identification information.
3. method as claimed in claim 2 is characterized in that, said S1 signaling connection identifier information comprises: S1 signaling connection identifier.
4. method as claimed in claim 3 is characterized in that, said S1 signaling connection identifier information further comprises:
SCTP SCTP coupling sign and SCTP traffic identifier.
5. method as claimed in claim 2 is characterized in that, said communication context identification information comprises: chain of command entity MME communication context sign, or, MME communication context sign and eNodeB communication context sign.
6. method as claimed in claim 5 is characterized in that, said method further comprises:
MME among the said EPC distributes new MME communication context sign, and sends the switching of carrying said new MME communication context sign and accomplish response message and give target eNode B.
7. method as claimed in claim 2 is characterized in that, behind user's success target approach sub-district, said method specifically comprises:
The MME of target eNode B in EPC sends and carries the handoff completion message that said former S1 signaling connects parameter and new S1 signaling connection parameter;
The UPE of MME in EPC sends route request information again, and request UPE carries out the user plane routing update;
UPE sends route response message again to MM E, and the routing update of expression user plane is accomplished.
8. method as claimed in claim 2 is characterized in that, behind user's success target approach sub-district, said method specifically comprises:
The UPE of target eNode B in EPC sends and carries the handoff completion message that said former S1 signaling connects parameter and new S1 signaling connection parameter;
After said U PE received said message, the MM E in EPC sent and carries said former S1 signaling connection parameter is connected parameter with new S1 signaling routing update request message, and notice MME user plane route is upgraded;
After MME receives said message, send the routing update response message to UPE.
9. like claim 7 or 8 described methods, it is characterized in that the operation of said MM E further comprises:
Said MME receives said carrying after new S1 signaling connects parameter and former S1 signaling is connected the message of parameter, preserves the new S1 signaling of carrying in the said message and connects parameter, and search former communication instance according to said former S1 signaling connection parameter.
10. the base station of an evolution is characterized in that, comprising:
The S1 signaling connects the parameter distribution module, is used to subscriber equipment U E and distributes the base station eNodeB of this evolution to be connected parameter with the S1 signaling of the block core EPC of evolution;
ENodeB further is provided with when the source eNodeB that switches as U E:
The S1 signaling connects parameter sending module one, and being used to send said S1 signaling connection parameter distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC; And/or,
Said eNodeB further is provided with when the target eNode B of switching as UE:
S1 signaling connection identifier information sending module two is used to send said source eNodeB and is connected the target eNode B that parameter and said target eNode B distribute with the former S1 signaling of EPC and is connected parameter with the S1 signaling of EPC to EPC.
11. set up the system that the S1 signaling connects in the evolvement network, it is characterized in that, comprising:
The base station eNodeB of at least two evolution is provided with:
The S1 signaling connects the parameter distribution module, is used to subscriber equipment U E and distributes this eNodeB to be connected parameter with the S1 signaling of the block core EPC of evolution;
Said eNodeB further is provided with when the source eNodeB that switches as U E:
The S1 signaling connects parameter sending module one, and being used to send said S1 signaling connection parameter distribution module is that the source eNodeB that UE distributes is connected parameter to target eNode B with the S1 signaling of EPC;
Said eNodeB further is provided with when the target eNode B of switching as UE:
S1 signaling connection identifier information sending module two is used to send said source eNodeB and is connected the target eNode B that parameter and said target eNode B distribute with the former S1 signaling of EPC and is connected parameter with the S1 signaling of EPC to EPC;
Said system also comprises the core EPC that evolution is divided into groups; Be used for connecting the information updating route that parameter sending module two sends according to said S1 signaling; And preserve said target eNode B and be connected parameter with the S1 signaling of EPC; And can search former communication entity according to said former S1 signaling connection parameter, realize S1 signaling establishment of connection between target eNode B and the EPC.
12. system as claimed in claim 11 is characterized in that, said EPC further comprises:
Chain of command entity MME and user entity UPE;
Said MME is used to preserve said target eNode B and is connected parameter with the S1 signaling of EPC, and searches former communication entity according to said former S1 signaling connection parameter;
Said UPE is used to switch and accomplishes the way of escape by renewal.
13. system as claimed in claim 12 is characterized in that, when said S1 signaling connection parameter was the communication context sign, said MME also was used to distribute new MME communication context sign to send to target eNode B.
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| CN109803333A (en) * | 2017-11-17 | 2019-05-24 | 中兴通讯股份有限公司 | It is coupled reorientation method and device |
| CN109803333B (en) * | 2017-11-17 | 2022-04-19 | 中兴通讯股份有限公司 | Coupling redirection method and device |
| US11758456B2 (en) | 2017-11-17 | 2023-09-12 | Zte Corporation | Association redirection method and device |
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