CN101132612A - Network entity emigration method for grouping core network - Google Patents
Network entity emigration method for grouping core network Download PDFInfo
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Abstract
This invention discloses a migration method for network entity of a packet core network including: A, T-eNodeB informs a UE to a source packet core network entity to finish switching from S-eNodeB to T-eNodeB and carries with a migration parameter in the notification, B, the source packet core network entity triggers migration according to said migration parameter and transmits context of the UE to a target packet core network entity, C, the source entity sends the address information of the target entity to the T-eNodeB and informs it to exchange service packet core network eitity, D, the T-eNodeB asks the target one to provide service, which carries out route update between anchor points with the access system.
Description
Technical field
The present invention relates to the packet-based core networks technical field, particularly a kind of moving method of packet-based core networks network entity.
Background technology
Universal mobile telecommunications system (UMTS) is to adopt the 3-G (Generation Three mobile communication system) of Wideband Code Division Multiple Access (WCDMA) (WCDMA) air interface technologies, also the UMTS system is called the WCDMA communication system usually.Referring to Fig. 1, the UMTS system has adopted and the similar structure of second generation mobile communication system, comprises subscriber equipment (UE), land radio access web (UTRAN) and core network (CN).Wherein, UTRAN is used to handle all and wireless function associated, and being used to handle voice calls all in the UMTS system, CN is connected with data, and the exchange of realization and external network and routing function.CN is from being divided into circuit commutative field (CS) and packet-switched domain (PS) in logic.
As shown in Figure 2, UTRAN comprises one or several RNS (RNS).RNS is made up of a radio network controller (RNC) and at least one base station (NodeB).Interface between RNC and the CN is the Iu interface, and NodeB is connected by Iub interface with RNC.In UTRAN inside, interconnected by Iur between the RNC, Iur can connect or connect by transmission network and realizes by the direct physical between the RNC.RNC is used for distributing and is attached thereto with control or the Radio Resource of relevant NodeB.NodeB then finishes the conversion of the data flow between Iub interface and the Uu interface, also participates in a part of RRM simultaneously.
NodeB comprises radio receiving-transmitting unit and Base-Band Processing parts.By the Iub interface and the RNC interconnection of standard, mainly finish the processing of Uu interface physical layer protocol.Its major function is spread spectrum, modulation, chnnel coding and despreading, demodulation, channel-decoding, also comprises the functions such as mutual conversion of baseband signal and radiofrequency signal.RNC is used to control the Radio Resource of UTRAN, mainly finishes functions such as connection foundation and disconnection, switching, the merging of grand diversity, RRM control.
The above network architecture is based on third generation affiliate (3GPP) the Rel6 framework of version in the past, consider the competitiveness of future network, 3GPP is studying a kind of brand-new evolution network framework to satisfy the application demand of mobile network in 10 years futures even longer time, comprise the Long Term Evolution (LTE) of System Architecture Evolution (SAE) and Access Network, wherein the Access Network of evolution is called E-UTRAN.The target of network evolution is to be desirable to provide a kind of low time delay, high data rate, high power system capacity and covering, low cost, complete IP-based network.Because E-UTRAN is a kind of brand-new network architecture, substantial variation all will take place in all nodes, function and the flow process of therefore existing framework.
The packet core network framework of evolution as shown in Figure 3, comprise Mobility Management Entity (MobilityManagement Entity, MME), user entity (User Plane Entity, UPE) and the user's face anchor point between the different access systems (Inter Access System Anchor, IASA) three logical functional entities.Wherein, MME is responsible for the mobile management of chain of command, comprise the management of user's context (context) and mobile status, distributing user temporary identity sign etc. are corresponding to the control plane part of current general packet radio service (GPRS)/UMTS internal system gprs service support point (SGSN); UPE 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, corresponding to the datum plane part of current GPRS/UMTS internal system SGSN and GPRS gateway support point (GGSN); IASA then serves as the user's face anchor point between different access systems.(Policy and Charging Rule Function PCRF) is used for policy control decision and flow based charging controlled function to the "Policy and Charging Rules Function entity.(HomeSubscriber Server HSS) is used for storing user subscription information to home network server.It should be noted that each interface function among Fig. 3 and whether exist at present and also finally do not determine that the relation of MME, UPE and IASA is yet not final definite simultaneously.
In evolvement network, LTE inside (Intra-LTE) switching is to realize by the flow process as Fig. 4.With reference to Fig. 4, the Intra-LTE switching may further comprise the steps:
Step 1101 when when connection is set up or the last time tracking area (TA) upgrades, provides source evolution base station (S-eNodeB) the roaming restricted information that interior UE context comprises.
Step 1102, S-eNodeB is according to the measuring process of roaming restricted information configuration UE.The metrical information that S-eNodeB provides is offered help for the connection locomotive function of control UE.
Step 1103, according to the measurement result of UE and the RRM of S-eNodeB (RRM) information, the S-eNodeB decision switches to UE in the sub-district (cell) of being controlled by target evolution base station (T-eNodeB).
Step 1104, S-eNodeB sends a handoff request (HO request) message to T-eNodeB, the necessary information when transmitting target side switching preparation in the message.The resource that the T-eNodeB configuration needs.
Step 1105 is switched required resource requirement if T-eNodeB can satisfy, and T-eNodeB will finish access control to improve the possibility of handover success.
Step 1106, target side are finished the switching set-up procedure, send handoff response (HOResponse) message to S-eNodeB, and transmission is reshuffled wireless resource information for UE in the message.
Step 1107, S-eNodeB sends switching command (HO Command) message to UE.Order UE finishes handoff procedure, comprises the wireless resource information of target side in the message.
Step 1108, UE carries out the synchronizing process of layer 1/ layer 2 (L1/L2) in target side.
Step 1109, in case successfully insert target side cell, UE just send to switch to T-eNodeB and finishes (HO Complete) message and represent to switch and finish.
Step 1110, T-eNodeB sends HO Complete message informing MME/UPEUE to MME/UPE and has changed cell.UPE switches to T-eNodeB with data path, and discharges the relevant user's face of S-eNodeB and the resource of transport network layer.
Step 1111, MME/UPE sends the affirmation message (HO Complete ACK) of HO Complete message to T-eNodeB.
Step 1112, T-eNodeB sends resource release (Release Resource) message trigger S-eNodeB to S-eNodeB and discharges resource.T-eNodeB can directly send this message after receiving handoff completion message.
Step 1113, receive Release Resource message after, S-eNodeB discharges and the resource of UE context-sensitive wireless and chain of command.S-eNodeB should continue to finish the data forwarding to T-eNodeB, realizes that up to one relevant machine-processed determination data forwarding can stop and the resource of user's face/transport network layer can be released.
Step 1114, if new cell belongs to a new TA, UE need carry out the TA registration to MME/UPE, MME/UPE will upgrade the region limits information of target side.
For network enabled redundancy and load Sharing in the SAE/LTE system, the many-to-many relationship of S1 interface is called S1-flex.A node that is E-UTRAN can be connected to a plurality of MME/UPE simultaneously.Utilize the connectedness of IP network, an eNodeB can be connected with all MME/UPE in theory.Yet because network security or network operation aspect, it is limited that the connection of S1 interface is generally the zone.Therefore, be not totally interconnected between all MME/UPE in the Public Land Mobile Nerwork (PLMN) and all eNodeB.
With reference to Fig. 5, in the SAE/LTE system pool area (pool area) is defined as follows: SAE/LTE pool area is made up of the eNodeB of some, and these eNodeB interrelate with one or more MME/UPE geographically; A SAE/LTE pool area is walked abreast by one or several MME/UPE service is provided; An eNodeB can belong to a plurality of SAE/LTE pool area, and promptly a plurality of overlapping SAE/LTE pool area comprise this eNodeB; If a TA has crossed over a plurality of SAE/LTE pool area, then all eNodeB must belong to identical one or more pool area in the TA; A SAE/LTE pool area is made up of one or several TA.
As shown in Figure 5, connect under the situation that can reach at the S1 interface, serving MME/UPE of UE will remain unchanged always.The transition process that does not have the UE serving MME/UPE under the ACTIVE attitude in this case.
If network is not supported the full connection of S1 interface, when UE passes through the border of pool area, just need to change serving MME/UPE of UE.Tentatively propose a kind of method now, promptly in the overlapping region of pool area, carried out the migration of MME/UPE in advance.Can be by main pond (primary pool) and adjacent pool (neighboring pool) for each the eNodeB definition MME/UPE in the overlapping region.When the MME/UPE that is found to be UE and provides service as the eNodeB of overlapping region is in neighboringpool, then initiate the transition process of serving MME/UPE.
But existing technology does not provide the migration flow process of the transmission method and the concrete MME/UPE of MME/UPE migration desired parameters.
Summary of the invention
In view of this, the present invention proposes a kind of moving method of packet-based core networks network entity, in order to realize the migration of packet-based core networks network entity.
According to above-mentioned purpose, the invention provides a kind of moving method of packet-based core networks network entity, this method comprises:
A. target evolution base station (T-eNodeB) is finished from source evolution base station (S-eNodeB) to source packet-based core networks network entity notice UE and is switched to T-eNodeB, and carries transfer parameter in notification message;
B. packet-based core networks network entity in source triggers migration according to described transfer parameter, and sends the contextual information of UE to targeted packets core net network entity;
C. packet-based core networks network entity in source sends the address information of targeted packets core net network entity to T-eNodeB, and notifies T-eNodeB to change the packet-based core networks network entity of service;
D.T-eNodeB provides service to the request of targeted packets core net network entity, carries out routing update between targeted packets core net network entity and the Anchor.
Comprise that further UE switches to the step of T-eNodeB from S-eNodeB before the steps A.
Further comprise before the steps A: in evolution base station eNodeB, dispose packet-based core networks network entity tabulation that belongs to main pond and the packet-based core networks network entity tabulation that belongs to adjacent pool.
Described transfer parameter comprises targeted packets core net network entity; Steps A further comprises: T-eNodeB judges the packet-based core networks network entity tabulation that source packet-based core networks network entity belongs to adjacent pool according to the packet-based core networks network entity tabulation of adjacent pool, from the packet-based core networks network entity tabulation in main pond, select a packet-based core networks network entity, and send to source packet-based core networks network entity as targeted packets core net network entity.
Described transfer parameter comprises the packet-based core networks network entity tabulation in T-eNodeB institute owner pond and the packet-based core networks network entity tabulation of adjacent pool.
Described transfer parameter comprises the migration indication information.
Described transfer parameter comprises the packet-based core networks network entity tabulation in T-eNodeB institute owner pond, the tabulation of packet-based core networks network entity and the migration indication information of adjacent pool.
Described transfer parameter comprises targeted packets core net network entity and the migration indication information that T-eNodeB selects.
Step B further comprises: source packet-based core networks network entity is judged from the packet-based core networks network entity tabulation of adjacent pool according to the packet-based core networks network entity tabulation of adjacent pool, selects a packet-based core networks network entity as targeted packets core net network entity from the packet-based core networks network entity tabulation in main pond.
Step B further comprises: source packet-based core networks network entity is according to migration indication information decision initiation transition process.
This method further comprises: when T-eNodeB is in resting state at UE, initiate transition process.
This method further comprises: T-eNodeB judges source packet-based core networks network entity in adjacent pool the time, initiates transition process.
Comprise further among the step C source packet-based core networks network entity judges whether UE is in the step of resting state, and change the packet-based core networks network entity of service at the situation that the is T-eNodeB that sends a notice.
Source packet-based core networks network entity notice T-eNodeB further comprises before changing the packet-based core networks network entity of serving among the step C: source packet-based core networks network entity determines that by detecting the data traffic of UE in some cycles UE is in nonmobile phase.
Among the step C, source packet-based core networks network entity is when UE is active state or idle condition, and notice T-eNodeB changes the packet-based core networks network entity of service.
Further comprise the step that the migration of targeted packets core net network entity notification source packet-based core networks network entity is finished after the step D.
Comprise further after the step D that source packet-based core networks network entity discharges the step of resource.
This method further comprises: the positional information of the above UE of targeted packets core net network entity updates HSS.
This method further comprises: UE initiates more new technological process of tracking area TA, upgrades the positional information of this UE in the network.
Described packet-based core networks network entity comprises mobile management entity MME and user entity UPE, and MME and the entity of UPE for merging.
Described packet-based core networks network entity comprises MME and UPE, and MME and UPE are independent entity.
This method further comprises: after source mobile management entity S-MME received that notice is finished in the switching of T-eNodeB, request source user entity S-UPE switched to T-eNodeB with the user plane path of UE, and S-MME or S-UPE finish to T-eNodeB affirmation switching; After target mobile management entity T-MME receives the contextual information of UE, the contextual information of described UE is sent to targeted customer's face entity T-UPE.
This method further comprises: after S-MME received that notice is finished in the switching of T-eNodeB, request S-UPE switched to T-eNodeB with the user plane path of UE, and S-MME or S-UPE finish to T-eNodeB affirmation switching; S-MME sends migration request to T-UPE after triggering migration; T-UPE is from the contextual information of S-UPE request UE, and request T-eNodeB switches to T-UPE with user plane path from S-UPE; T-eNodeB switches to T-UPE with user plane path from S-UPE according to this request.
This method further comprises: after S-UPE received that notice is finished in the switching of T-eNodeB, notice S-MME UE position changed, and finishes to T-eNodeB affirmation switching; S-MME sends migration request to T-MME after triggering migration, and T-MME sends to T-UPE with the contextual information of UE.
This method further comprises: after S-UPE received that notice is finished in the switching of T-eNodeB, notice S-MME UE position changed, and finishes to T-eNodeB affirmation switching; S-MME sends migration request to T-UPE after triggering migration; T-UPE is from the contextual information of S-UPE request UE, and request T-eNodeB switches to T-UPE with user plane path from S-UPE; T-eNodeB switches to T-UPE with user plane path from S-UPE according to this request.
From such scheme, as can be seen,, thereby realized the migration of packet-based core networks network entities because the present invention has provided the interaction flow between each network entity when service packet core net network entity moves in detail.Further, the present invention gives needs the parameter transmitted between each network entity of when migration, be convenient to realize.In addition, the present invention gives the method for multiple triggering packet-based core networks network entity migration, makes it possible to realize in multiple occasion the migration of packet-based core networks network entity.When the present invention has also reduced UE and has moved on the pool area border because the S1 interface area is limited the risk of call drop.
Description of drawings
Fig. 1 is a UMTS system configuration schematic diagram;
Fig. 2 is the UTRAN schematic network structure;
Fig. 3 is the packet-based core networks network architecture diagram of evolution;
Fig. 4 is an Intra-LTE HO schematic flow sheet;
Fig. 5 is the graph of a relation of pool area and S1-flex;
Fig. 6 is the schematic flow sheet of first embodiment of the invention;
Fig. 7 is the schematic flow sheet of second embodiment of the invention;
Fig. 8 is the schematic flow sheet of third embodiment of the invention;
Fig. 9 is the schematic flow sheet of fourth embodiment of the invention;
Figure 10 is the schematic flow sheet of fifth embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in more detail by the following examples.
General plotting of the present invention is at first described.The present invention has disposed MME/UPE tabulation that belongs to primary pool and the MME/UPE tabulation that belongs to neighboring pool in advance in the eNodeB that is in pool area overlapping region.Then, the transition process of MME/UPE is as follows:
Step S1, S-eNodeB initiates the Intra-LTE handoff procedure.
Step S2, after switching was finished, UE sent handoff completion message to T-eNodeB.
Step S3 after T-eNodeB receives handoff completion message, can do the processing of following several modes, sends different transfer parameters to source MME/UPE (S-MME/UPE):
Processing mode one: T-eNodeB judges current serving MME/UPE according to the MME/UPE list information of the MME/UPE tabulation of the primary pool of configuration and neighboring pool and is in neighboring pool tabulates, then from the MME/UPE tabulation of primary pool, select a MME/UPE, as the target MME/UPE (T-MME/UPE) of serving MME/UPE migration; T-eNodeB sends handoff completion message to S-MME/UPE, includes the T-MME/UPE information of having selected in the message.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention does not limit concrete message name.
Processing mode two: T-eNodeB sends handoff completion message to S-MME/UPE, includes the MME/UPE tabulation of the affiliated primary pool of T-eNodeB and the MME/UPE list information of neighboring pool in the message.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention does not limit concrete message name.
Processing mode three: T-eNodeB sends handoff completion message to S-MME/UPE, includes the indication information of MME/UPE migration in the message.This indication information indication CN node is initiated the transition process of serving MME/UPE.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention does not limit concrete message name.
Processing mode four: T-eNodeB sends handoff completion message to S-MME/UPE, includes MME/UPE tabulation and the MME/UPE list information of neighboring pool and the indication information of MME/UPE migration of the affiliated primary pool of T-eNodeB in the message.This indication information indication CN node is initiated the transition process of serving MME/UPE.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention does not limit concrete message name.
Processing mode five: T-eNodeB sends handoff completion message to S-MME/UPE, includes the indication information of the T-MME/UPE information selected and MME/UPE migration in the message.This indication information indication CN node is initiated the transition process of serving MME/UPE.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention does not limit concrete message name.
In several in the above modes, the transfer parameter that sends to S-MME/UPE can comprise T-MME/UPE, the MME/UPE tabulation of the primary pool under the T-eNodeB and MME/UPE list information, migration indication information and their various combination of neighboring pool that T-eNodeB selects.
Step S4, S-MME/UPE receive after message is switched in handoff completion message or path will do following processing:
Processing mode one: if do not comprise the T-MME/UPE information of serving MME/UPE migration in the handoff completion message, then S-MME/UPE is according to the MME/UPE tabulation of the primary pool of the eNodeB in the message and the MME/UPE list information of neighboring pool, judge that oneself is whether in the tabulation of primary pool, if, then do not trigger the flow process that serving MME/UPE moves.If S-MME/UPE is in the neighboring pool tabulation, then from the MME/UPE tabulation of primary pool, select a MME/UPE, as the T-MME/UPE of serving MME/UPE migration.
If comprise the T-MME/UPE information of serving MME/UPE migration in the handoff completion message, then do not carry out above-mentioned steps, directly execution in step S5.
Processing mode two: according to the migration of the MME/UPE in message indication information, whether the S-MME/UPE decision initiates the transition process of MME/UPE.S-MME/UPE can use T-MME/UPE information in the message as the T-MME/UPE of MME/UPE migration, also can select a MME/UPE as moving target from oneself configured list, and the present invention is not limited to this.
Step S5, S-MME/UPE judge that UE is in dormancy (dormant) state, according to the T-MME/UPE information of determining among the step S4, initiate the migration flow process of serving MME/UPE.S-MME/UPE can also determine thereby whether UE is in nonmobile phase and triggers the migration flow process by the data traffic in the some cycles that detects UE.S-MME/UPE can also directly trigger the migration flow process under activity (ACTIVE) state of UE or free time (IDLE) state.The present invention does not do any restriction to trigger condition.
Because the relation between three nodes of MME/UPE/Anchor is not also determined at present, and Intra-LTE HO handoff completion message can be to send to MME to send to UPE, therefore, it is three parts that specific embodiment of the present invention is divided into according to the difference of framework, is respectively MME/UPE and merges; MME/UPE separates, and handoff completion message sends to MME; MME/UPE separates, and handoff completion message sends to UPE.Do not do any restriction about the present invention that concerns between UPE and the Anchor, they may merge, and also may separate.After the MME/UPE merging, may be called IAD or other title, the present invention also is not limited to concrete title.
After MME/UPE separated, the migration under the Active attitude was divided into MME/UPE and moves, only moves MME simultaneously, only moves three kinds of scenes of UPE.Therefore, in description of the invention, be integrated MME and UPE are described, perhaps independent MME or independent UPE with the packet-based core networks network entity.
In addition, if the Dormant pattern is managed by T-eNodeB, then whether T-eNodeB can be in the migration flow process that neighboring pool initiates serving MME/UPE according to the serving MME/UPE whether UE is in Dorrmant state and UE.
Simultaneously, exist the MME/UPE entity also preserve serve primary pool and the neighboring pool information of eNodeB to some extent, to need not carry the configuration information in migration indication or pond this moment in handoff completion message (HO COMPLETE), MME/UPE can directly initiate the migration flow process of serving MME/UPE.
When first embodiment: MME/UPE merges, serving MME/conveying flow of UPE migration trigger condition parameters and concrete migration flow process.
With reference to Fig. 6, first embodiment of the invention may further comprise the steps:
Step 101, S-eNodeB initiates normal Intra-LTE switching flow.This switching flow is same as the prior art, repeats no more here.
Step 102, UE sends handoff completion message to T-eNodeB and represents to switch and finish after successfully inserting target side cell.
Step 103 after T-eNodeB receives handoff completion message, can be selected T-MME/UPE, also can not select T-MME/UPE.Select the process of T-MME/UPE as follows: judging current serving MME/UPE according to the MME/UPE list information of the MME/UPE tabulation of the primarypool of configuration and neighboring pool is that S-MME/UPE is in the neighboring pool tabulation, then the T-MME/UPE that selects a MME/UPE to move as serving MME/UPE from the MME/UPE tabulation of primary pool.
T-eNodeB sends handoff completion message to S-MME/UPE, if do not select T-MME/UPE, then includes the MME/UPE tabulation of the affiliated primary pool of T-eNodeB and the MME/UPE list information of neighboring pool in the message; If selected T-MME/UPE, then comprise the T-MME/UPE information of having selected in the message.Can also further carry the indication information of MME/UPE migration in this message, this indication information indication CN carves the transition process of initiation serving MME/UPE at a time.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention is not limited to this.
Step 104, S-MME/UPE sends the affirmation message (HOComplete ACK) of handoff completion message to T-eNodeB.
Step 105, after S-MME/UPE receives acknowledge message, if do not comprise T-MME/UPE in the handoff completion message, then according to the MME/UPE tabulation of the primary pool of the eNodeB in the handoff completion message and the MME/UPE list information of neighboring pool, S-MME/UPE judges that oneself is whether in the tabulation of primary pool, if, then do not trigger the flow process of serving MME/UPE migration, if S-MME/UPE is in the neighboring pool tabulation, then from the MME/UPE tabulation of primary pool, select a MME/UPE, as the T-MME/UPE of serving MME/UPE migration, and according to migration indication information initiation MME/UPE transition process.If comprise T-MME/UPE information in the handoff completion message, then according to the migration of the MME/UPE in handoff completion message indication information, the transition process of MME/UPE is initiated in the MME/UPE decision.
S-MME/UPE judges UE and is in the dormant state, initiates the migration flow process of serving MME/UPE.S-MME/UPE can also determine that UE is in nonmobile phase by detecting the data traffic of UE in some cycles, thereby triggers the migration flow process.S-MME/UPE can also directly trigger the migration flow process under the ACTIVE of UE state, IDLE state.The present invention does not do any restriction to trigger condition.
Step 106, S-MME/UPE sends context to T-MME/UPE and transmits request (ContextTransfer Required) message, initiates the migration flow process of serving MME/UPE.Include the encryption of contextual information, security information, employing of UE and compress algorithm etc. in the message.
Step 107, T-MME/UPE sends context to S-MME/UPE and transmits request response (Context Transfer Response) message.
Step 108, S-MME/UPE sends migration order (RelocationCommand) message to T-eNodeB, and order eNodeB changes the MME/UPE of service.The address information that includes T-MME/UPE in the message.
Step 109, T-eNodeB sends migration request (Relocation Request) message to T-MME/UPE, and request T-MME/UPE provide service.
Step 110, T-MME/UPE and HSS carry out more new technological process of position, upgrade the positional information of the above UE of HSS.
Step 111 is carried out the routing update process between T-MME/UPE and Anchor.It should be noted that step 110 and step 111 order in no particular order, can change.
Step 112, T-MME/UPE sends migration to T-eNodeB and finishes (RelocationComplete) message, and the expression migration is finished.
Step 113, T-eNodeB sends to move to finish to T-MME/UPE and replys (RelocationComplete Ack) message, finishes the migration flow process.
Step 114, UE initiates more new technological process of TA, upgrades the positional information of this UE in the network.If step 110 has been carried out in the front, then needn't execution in step 114.
It should be noted that the present invention does not limit the message name in the above-mentioned MME/UPE migration flow process.
Second embodiment: MME/UPE separates, and handoff completion message sends to MME, and MME/UPE moves simultaneously.
With reference to Fig. 7, the flow process of second embodiment is as follows:
Step 201, S-eNodeB initiates normal Intra-LTE switching flow.This switching flow is same as the prior art, repeats no more here.
Step 202 after T-eNodeB receives handoff completion message, can be selected T-MME/UPE, also can not select T-MME/UPE.Similar in the process of selecting T-MME/UPE and the first embodiment step 102, repeat no more here.
T-eNodeB sends handoff completion message to S-MME, if do not select T-MME/UPE, then includes the MME/UPE tabulation of the affiliated primary pool of T-eNodeB and the MME/UPE list information of neighboring pool in the message; If selected T-MME/UPE, then comprise the T-MME/UPE information of having selected in the message.Can also further carry the indication information of MME/UPE migration in this message, this indication information indication CN carves the transition process of initiation serving MME/UPE at a time.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention is not limited to this.
Step 203, S-MME switches message to the S-UPE transmit path, and request S-UPE switches to T-eNodeB with the user plane path of UE.
Step 204, S-UPE is to S-MME transmit path switch acknowledgment message, and the switching of affirmation path is finished.
Step 205, S-MME sends to switch to T-eNodeB and finishes acknowledge message, finishes this handoff procedure.
In addition, S-UPE can also directly send to switch to T-eNodeB and finish acknowledge message, finishes this handoff procedure, and this step is as step 204 among Fig. 7 ' shown in.
Step 206, after S-MME receives response message, if do not comprise T-MME/UPE in the handoff completion message, then according to the MME/UPE tabulation of the primary pool of the eNodeB in the handoff completion message and the MME/UPE list information of neighboring pool, MME/UPE judges that oneself is whether in the tabulation of primary pool, if, then do not trigger the flow process of serving MME/UPE migration, if MME/UPE is in the neighboring pool tabulation, S-MME then selects a MME/UPE from the MME/UPE tabulation of primary pool, as the T-MME/UPE of serving MME/UPE migration, and according to migration indication information initiation MME/UPE transition process.If comprise the T-MME/UPE information of serving MME/UPE migration in the handoff completion message, then according to the migration of the MME/UPE in handoff completion message indication information, the transition process of MME/UPE is initiated in the S-MME decision.
S-MME judges UE and is in the dormant state, initiates the migration flow process of serving MME/UPE.S-MME can also determine that UE is in nonmobile phase by detecting the data traffic of UE in some cycles, thereby triggers the migration flow process.S-MME can also directly trigger the migration flow process under the ACTIVE of UE state, IDLE state.The present invention does not do any restriction to trigger condition.
Step 207, S-MME sends Relocation Required message to T-MME, initiates the migration flow process of serving MME/UPE.The contextual information that includes UE in the message, security information, the encryption of employing and a compress algorithm etc.
Can further include step 207 ', T-MME and HSS carry out more new technological process of position, upgrade the positional information of the above UE of HSS.
Step 208, T-MME send to activate context (Active Context) message to T-UPE, and the encryption of the security information of UE, employing and a compress algorithm etc. are sent to T-UPE.
After this, can further include step 208 ', carry out the routing update process between T-UPE and Anchor.
Step 209, T-UPE sends to T-MME and activates context response (Active ContextResponse) message.
Step 210, T-MME sends acknowledge message Relocation Request Ack to S-MME.
Step 211, S-MME sends Relocation Command message to T-eNodeB, and order eNodeB changes the MME/UPE of service, includes the address information of T-MME/UPE in this message.
Step 212, T-eNodeB sends Relocation Request message to T-MME, and request T-MME provide service.
If there is not execution in step 207 ', then this flow process may further include step 212 ', T-MME and HSS carry out more new technological process of position, upgrade the positional information of the above UE of HSS.
If carried out step 208 before ', direct execution in step 216 then, otherwise execution in step 213 execution in step 216 again to step 215.
Step 213, T-MME sends updating context (Update Context) message to T-UPE, and the address information of T-eNodeB is sent to T-UPE.
Step 214 is carried out the routing update process between T-UPE and Anchor.
Step 215, T-UPE sends updating context response (Update ContextResponse) message to T-MME.
Step 216, T-MME sends Relocation Complete message to T-eNodeB, and the expression migration is finished.
After step 215, T-UPE also can directly send migration to T-eNodeB and finish acknowledge message, finishes this transition process.This moment is execution in step 216 not.
Step 217, T-eNodeB sends to transmit to move to S-MME and finishes (Forward RelocationComplete) message, and notice S-MME migration is finished.
Step 218, S-MME and S-UPE discharge related resource respectively.
If the front does not have execution in step 207 ' or step 212 ', then this flow process may further include step 219, and UE initiates more new technological process of TA, upgrades the positional information of this UE in the network.
Equally, second embodiment of the invention does not limit the title of each message.
The 3rd embodiment: MME/UPE separates, and handoff completion message sends to MME, only moves UPE.
With reference to Fig. 8, the flow process of third embodiment of the invention is as follows:
Step 301, S-eNodeB initiates normal Intra-LTE switching flow.This switching flow is same as the prior art, repeats no more here.
Step 302 after T-eNodeB receives handoff completion message, can be selected T-/UPE, also can not select T-UPE.Select the process of T-UPE as follows: to judge current service UPE according to the UPE list information of the UPE tabulation of the primary pool of configuration and neighboring pool and be in the neighboring pool tabulation, then the T-UPE that from the UPE tabulation of primary pool, selects a UPE to move as service UPE.
T-eNodeB sends handoff completion message to S-MME, if do not select T-UPE, then includes the UPE tabulation of the affiliated primary pool of T-eNodeB and the UPE list information of neighboring pool in the message; If selected T-UPE, then comprise the T-UPE information of having selected in the message.Can also further carry the indication information of UPE migration in this message.This indication information indication CN carves the transition process of initiating service UPE at a time.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention is not limited to this.
Step 303, MME switches message to the S-UPE transmit path, and request S-UPE switches to T-eNodeB with the user plane path of UE.
Step 304, S-UPE is to MME transmit path switch acknowledgment message, and the switching of affirmation path is finished.
In addition, S-UPE can directly send to switch to T-eNodeB and finish acknowledge message, finishes this handoff procedure, as step 304 among Fig. 8 ' shown in.
Step 305, MME sends to switch to T-eNodeB and finishes acknowledge message, finishes this handoff procedure.
Step 306, after S-MME receives response message, if do not comprise T-UPE in the switching message, then according to the UPE tabulation of the primary pool of the eNodeB in the handoff completion message and the UPE list information of neighboringpool, MME judges that UPE is whether in the tabulation of primary pool, if, then do not trigger the flow process of service UPE migration, if UPE is in the neighboring pool tabulation, MME then selects the T-UPE of a UPE as service UPE migration from the UPE tabulation of primary pool, and initiates the MME/UPE transition process according to the migration indication information.If comprise the T-UPE information of service UPE migration in the handoff completion message, then according to the migration of the UPE in handoff completion message indication information, whether the MME decision initiates the transition process of UPE.
S-MME judges UE and is in the dormant state, initiates the migration flow process of service UPE.S-MME can also determine that thereby UE is in nonmobile phase and triggers the migration flow process by detecting the data traffic of UE in some cycles.S-MME can also directly trigger the migration flow process under the ACTIVE of UE state, IDLE state.The present invention does not do any restriction to trigger condition.
Step 307, MME sends Relocation Request message to T-UPE, initiates the migration flow process of service UPE.Include the encryption of contextual information, security information, employing of UE and compress algorithm etc. in the message.
Step 308, T-UPE sends Context Request message to S-UPE, to the Context information of S-UPE request UE.
Step 309, S-UPE sends Context Request Response message to T-UPE, and the Context information of UE is sent to T-UPE.
Further, present embodiment can also comprise step 309 ', carry out the routing update process between T-UPE and Anchor.
Step 310, T-UPE sends user plane path to T-eNodeB and switches message, and request T-eNodeB switches to T-UPE with user plane path from S-UPE.
Step 311, T-eNodeB sends user plane path handover acknowledge message to T-UPE, and the expression switching is finished.
If there is not execution in step 309 ' before, then execution in step 312, carry out the routing update process between T-UPE and Anchor; Otherwise direct execution in step 313.
Step 313, T-UPE sends Relocation Complete message to MME, and the expression migration is finished.
Equally, third embodiment of the invention does not limit the title of each message.
The 4th embodiment: MME/UPE separates, and handoff completion message sends to UPE, and MME/UPE moves simultaneously.
With reference to Fig. 9, the flow process of fourth embodiment of the invention is as follows:
Step 401, S-eNodeB initiates normal Intra-LTE switching flow.This switching flow is same as the prior art, repeats no more here.
Step 402 after T-eNodeB receives handoff completion message, can be selected T-MME/UPE, also can not select T-MME/UPE.Similar in the process of selecting T-MME/UPE and the first embodiment step 102, repeat no more here.
T-eNodeB sends handoff completion message to S-UPE, if do not select T-MME/UPE, then includes the MME/UPE tabulation of the affiliated primary pool of T-eNodeB and the MME/UPE list information of neighboring pool in the message; If selected T-MME/UPE, then comprise the T-MME/UPE information of having selected in the message.Can also further carry the indication information of MME/UPE migration in this message, this indication information indication CN carves the transition process of initiation serving MME/UPE at a time.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention is not limited to this.
Step 403, S-UPE switches message to the S-MME transmit path, and notice S-MMEUE position changes, and the content with handoff completion message brings S-MME simultaneously.
Step 404, S-MME is to S-UPE transmit path switch acknowledgment message, and the switching of affirmation path is finished.
Step 405, S-UPE sends to switch to T-eNodeB and finishes acknowledge message, finishes this handoff procedure.
Step 4066, after S-MME receives response message, if do not comprise T-MME/UPE in the handoff completion message, then according to the MME/UPE tabulation of the primary pool of the eNodeB in the handoff completion message and the MME/UPE list information of neighboring pool, S-MME judges that oneself is whether in the tabulation of primary pool, if, then do not trigger the flow process of serving MME/UPE migration, if MME/UPE is in the neighboring pool tabulation, MME/UPE then selects a MME/UPE from the MME/UPE tabulation of primary pool, as the T-MME/UPE of serving MME/UPE migration, and according to migration indication information initiation MME/UPE transition process.If comprise the T-MME/UPE information of serving MME/UPE migration in the handoff completion message, then according to the migration of the MME/UPE in handoff completion message indication information, the transition process of MME/UPE is initiated in the S-MME decision.
S-MME judges UE and is in the dormant state, initiates the migration flow process of serving MME/UPE.S-MME can also determine that UE is in nonmobile phase by detecting the data traffic of UE in some cycles, thereby triggers the migration flow process.S-MME can also directly trigger the migration flow process under the ACTIVE of UE state, IDLE state.The present invention does not do any restriction to trigger condition.
Step 407, S-MME sends Relocation Required message to T-MME, initiates the migration flow process of serving MME/UPE.Include the encryption of contextual information, security information, employing of UE and compress algorithm etc. in the message.
Can further include step 407 ', T-MME and HSS carry out more new technological process of position, upgrade the positional information of the above UE of HSS.
Step 408, T-MME sends Active Context message to T-UPE, and the encryption of the security information of UE, employing and a compress algorithm etc. are sent to T-UPE.
Present embodiment can further include step 408 ', carry out the routing update process between T-UPE and Anchor.
Step 409, T-UPE sends Active Context Response message to T-MME.
Step 410, T-MME sends acknowledge message Relocation Request Ack to S-MME.
Step 411, S-MME sends Relocation Command message to T-eNodeB, and order eNodeB changes the MME/UPE of service, includes the address information of T-MME/UPE in this message.
Step 412, T-eNodeB sends Relocation Request message to T-MME, and request T-MME provide service.
If there is not execution in step 407 ', then present embodiment may further include step 412 ', T-MME and HSS carry out more new technological process of position, upgrade the positional information of the above UE of HSS.
If carried out step 408 before ', direct execution in step 416 then, otherwise execution in step 413 execution in step 416 again to step 415.
Step 413, T-MME sends Update Context message to T-UPE, and the address information of T-eNodeB is sent to T-UPE.
Step 414 is carried out the routing update process between T-UPE and Anchor.
Step 415, T-UPE sends Update Context Response message to T-MME.
Step 416, T-MME sends Relocation Complete message to T-eNodeB, and the expression migration is finished.
After step 415, T-UPE also can directly send migration to T-eNodeB and finish acknowledge message, finishes this transition process.In such cases, incite somebody to action not execution in step 416.
Step 417, T-eNodeB sends Forward Relocation Complete message to S-MME, and notice S-MME migration is finished.
Step 418, S-MME and S-UPE discharge related resource respectively.
If the front does not have execution in step 407 ' or step 412 ', then present embodiment may further include step 419, and UE initiates more new technological process of TA, upgrades the positional information of this UE in the network.
Equally, fourth embodiment of the invention does not limit the title of each message.
The 5th embodiment: MME/UPE separates, and handoff completion message sends to UPE, only moves UPE.
With reference to Figure 10, the flow process of fifth embodiment of the invention is as follows:
Step 501, S-eNodeB initiates normal Intra-LTE switching flow.This switching flow is same as the prior art, repeats no more here.
Step 502 after T-eNodeB receives handoff completion message, can be selected T-UPE, also can not select T-UPE.Similar in the process of selecting T-UPE and the 3rd embodiment step 302 repeats no more here.
T-eNodeB sends handoff completion message to S-UPE, if do not select T-UPE, then includes the UPE tabulation of the affiliated primary pool of T-eNodeB and the UPE list information of neighboring pool in the message; If selected T-UPE, then comprise the T-UPE information of having selected in the message.Can also further carry the indication information of UPE migration in this message, this indication information indication CN carves the transition process of initiating service UPE at a time.Under some scene, handoff completion message also may be called the path and switch message, and their effect is equal to, and the present invention is not limited to this.
Step 503, S-UPE switches message to the MME transmit path, and the position of notice MME UE changes, and brings MME with the content in the handoff completion message simultaneously.。
Step 504, MME is to S-UPE transmit path switch acknowledgment message, and the switching of affirmation path is finished.
Step 505, S-UPE sends to switch to T-eNodeB and finishes acknowledge message, finishes this handoff procedure.
Step 506, after MME receives response message, if do not comprise T-UPE in the switching message, then according to the UPE tabulation of the primary pool of the eNodeB in the handoff completion message and the UPE list information of neighboringpool, MME judges that S-UPE is whether in the tabulation of primary pool, if, then do not trigger the flow process of service UPE migration, if S-UPE is in the neighboring pool tabulation, MME then selects a UPE from the UPE tabulation of primary pool, as the T-UPE of service UPE migration, and according to migration indication information initiation MME/UPE transition process.If comprise the T-UPE information of service UPE migration in the handoff completion message, then according to the migration of the UPE in handoff completion message indication information, the transition process of UPE is initiated in the MME decision.
MME judges UE and is in the dormant state, initiates the migration flow process of service UPE.MME can also determine that thereby UE is in nonmobile phase and triggers the migration flow process by detecting the data traffic of UE in some cycles.MME can also directly trigger the migration flow process under the ACTIVE of UE state, IDLE state.The present invention does not do any restriction to trigger condition.
Step 507, MME sends Relocation Request message to T-UPE, initiates the migration flow process of service UPE.The contextual information that includes UE in the message, security information, the encryption of employing and a compress algorithm etc.
Step 508, T-UPE sends Context Request message to S-UPE, to the Context information of S-UPE request UE.
Step 509, S-UPE sends Context Request Respnse message to T-UPE, and the Context information of UE is sent to T-UPE.
Present embodiment can further include step 509 ', carry out the routing update process between T-UPE and Anchor.
Step 510, T-UPE sends user plane path to T-eNodeB and switches message, and request T-eNodeB switches to T-UPE with user plane path from S-UPE.
Step 511, T-eNodeB sends user plane path handover acknowledge message to T-UPE, and the expression switching is finished.
If before, do not have step 509 ', then execution in step 512, carry out the routing update process between T-UPE and Anchor; Otherwise direct execution in step 513.
Step 512 is carried out the routing update process between T-UPE and Anchor.
Step 513, T-UPE sends Relocation Complete message to MME, and the expression migration is finished.
Equally, fifth embodiment of the invention does not limit the title of each message.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (25)
1. the moving method of a packet-based core networks network entity is characterized in that, this method comprises:
A. target evolution base station T-eNodeB finishes from source evolution base station S-eNodeB to source packet-based core networks network entity notifying user equipment UE and switches to T-eNodeB, and carries transfer parameter in notification message;
B. packet-based core networks network entity in source triggers migration according to described transfer parameter, and sends the contextual information of UE to targeted packets core net network entity;
C. packet-based core networks network entity in source sends the address information of targeted packets core net network entity to T-eNodeB, and notifies T-eNodeB to change the packet-based core networks network entity of service;
D.T-eNodeB provides service to the request of targeted packets core net network entity, carries out routing update between targeted packets core net network entity and connecting system between the anchor point Anchor.
2. method according to claim 1 is characterized in that, comprises that further UE switches to the step of T-eNodeB from S-eNodeB before the steps A.
3. method according to claim 1 is characterized in that, further comprises before the steps A: dispose packet-based core networks network entity tabulation that belongs to main pond and the packet-based core networks network entity tabulation that belongs to adjacent pool in evolution base station eNodeB.
4. method according to claim 3 is characterized in that, described transfer parameter comprises targeted packets core net network entity;
Steps A further comprises: T-eNodeB judges the packet-based core networks network entity tabulation that source packet-based core networks network entity belongs to adjacent pool according to the packet-based core networks network entity tabulation of adjacent pool, from the packet-based core networks network entity tabulation in main pond, select a packet-based core networks network entity, and send to source packet-based core networks network entity as targeted packets core net network entity.
5. method according to claim 3 is characterized in that, described transfer parameter comprises the packet-based core networks network entity tabulation in T-eNodeB institute owner pond and the packet-based core networks network entity tabulation of adjacent pool.
6. method according to claim 3 is characterized in that described transfer parameter comprises the migration indication information.
7. method according to claim 3 is characterized in that, described transfer parameter comprises the packet-based core networks network entity tabulation in T-eNodeB institute owner pond, the tabulation of packet-based core networks network entity and the migration indication information of adjacent pool.
8. method according to claim 3 is characterized in that, described transfer parameter comprises targeted packets core net network entity and the migration indication information that T-eNodeB selects.
9. according to claim 5 or 7 described methods, it is characterized in that step B further comprises:
Source packet-based core networks network entity is judged from the packet-based core networks network entity tabulation of adjacent pool according to the packet-based core networks network entity tabulation of adjacent pool, selects a packet-based core networks network entity as targeted packets core net network entity from the packet-based core networks network entity tabulation in main pond.
10. according to claim 6,7 or 8 described methods, it is characterized in that step B further comprises: source packet-based core networks network entity is according to migration indication information decision initiation transition process.
11. method according to claim 1 is characterized in that, this method further comprises: when T-eNodeB is in resting state at UE, initiate transition process.
12. method according to claim 3 is characterized in that, this method further comprises: T-eNodeB judges source packet-based core networks network entity in adjacent pool the time, initiates transition process.
13. method according to claim 1, it is characterized in that, comprise further among the step C source packet-based core networks network entity judges whether UE is in the step of resting state, and change the packet-based core networks network entity of service at the situation that the is T-eNodeB that sends a notice.
14. method according to claim 1 is characterized in that, source packet-based core networks network entity notice T-eNodeB further comprises before changing the packet-based core networks network entity of serving among the step C:
Source packet-based core networks network entity determines that by detecting the data traffic of UE in some cycles UE is in nonmobile phase.
15. method according to claim 1 is characterized in that, among the step C,
Source packet-based core networks network entity is when UE is active state or idle condition, and notice T-eNodeB changes the packet-based core networks network entity of service.
16. method according to claim 1 is characterized in that, further comprises the step that the migration of targeted packets core net network entity notification source packet-based core networks network entity is finished after the step D.
17. method according to claim 1 is characterized in that, comprises further after the step D that source packet-based core networks network entity discharges the step of resource.
18. method according to claim 1 is characterized in that, this method further comprises: the positional information of the above UE of targeted packets core net network entity updates home network server HSS.
19. method according to claim 1 is characterized in that, this method further comprises: UE initiates more new technological process of tracking area TA, upgrades the positional information of this UE in the network.
20. method according to claim 1 is characterized in that, described packet-based core networks network entity comprises mobile management entity MME and user entity UPE, and MME and the entity of UPE for merging.
21. method according to claim 1 is characterized in that, described packet-based core networks network entity comprises MME and UPE, and MME and UPE are independent entity.
22. method according to claim 21 is characterized in that, this method further comprises:
After source mobile management entity S-MME received that notice is finished in the switching of T-eNodeB, request source user entity S-UPE switched to T-eNodeB with the user plane path of UE, and S-MME or S-UPE finish to T-eNodeB affirmation switching;
After target mobile management entity T-MME receives the contextual information of UE, the contextual information of described UE is sent to targeted customer's face entity T-UPE.
23. method according to claim 21 is characterized in that, this method further comprises:
After S-MME received that notice is finished in the switching of T-eNodeB, request S-UPE switched to T-eNodeB with the user plane path of UE, and S-MME or S-UPE finish to T-eNodeB affirmation switching;
S-MME sends migration request to T-UPE after triggering migration;
T-UPE is from the contextual information of S-UPE request UE, and request T-eNodeB switches to T-UPE with user plane path from S-UPE;
T-eNodeB switches to T-UPE with user plane path from S-UPE according to this request.
24. method according to claim 21 is characterized in that, this method further comprises:
After S-UPE received that notice is finished in the switching of T-eNodeB, notice S-MME UE position changed, and finishes to T-eNodeB affirmation switching;
S-MME sends migration request to T-MME after triggering migration, and T-MME sends to T-UPE with the contextual information of UE.
25. method according to claim 21 is characterized in that, this method further comprises:
After S-UPE received that notice is finished in the switching of T-eNodeB, notice S-MME UE position changed, and finishes to T-eNodeB affirmation switching;
S-MME sends migration request to T-UPE after triggering migration;
T-UPE is from the contextual information of S-UPE request UE, and request T-eNodeB switches to T-UPE with user plane path from S-UPE;
T-eNodeB switches to T-UPE with user plane path from S-UPE according to this request.
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| CN110958651A (en) * | 2018-09-26 | 2020-04-03 | 成都鼎桥通信技术有限公司 | Core network reselection method and device |
| CN110958651B (en) * | 2018-09-26 | 2022-06-14 | 成都鼎桥通信技术有限公司 | Core network reselection method and device |
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