CN103428801A - Method and apparatus for realizing path management - Google Patents
Method and apparatus for realizing path management Download PDFInfo
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- CN103428801A CN103428801A CN2012101667297A CN201210166729A CN103428801A CN 103428801 A CN103428801 A CN 103428801A CN 2012101667297 A CN2012101667297 A CN 2012101667297A CN 201210166729 A CN201210166729 A CN 201210166729A CN 103428801 A CN103428801 A CN 103428801A
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Abstract
The invention discloses a method and apparatus for realizing path management. When local routing, embodied by a direct tunnel, of a terminal fails, a wireless side network element/service gateway serving as a opposite communication terminal of the terminal is notified to release direct tunnel information. Therefore, the path management technology is realized. When the local routing, embodied by the direct tunnel, of the terminal fails, path management can be carried out effectively by the opposite communication terminal, thereby realizing path releasing.
Description
Technical field
The present invention relates to the communications field, be specifically related to a kind of method and apparatus of realizing route management.
Background technology
In order to keep the competitiveness of 3-G (Generation Three mobile communication system) in the communications field, for the user provides, speed is faster, the lower and more personalized Mobile Communication Service of time delay, simultaneously, reduce the operation cost of operator, third generation partner program (3rd Generation Partnership Project, 3GPP) standard operation group just is being devoted to the research of evolved packet system (Evolved Packet System, EPS).Whole EPS system is divided into wireless access network and core net two parts.In core net, comprised home subscriber server (Home Subscriber Server, HSS), Mobility Management Entity (Mobility Management Entity, MME), Serving GPRS Support Node (Serving GPRS Support Node, SGSN), policy charging rule function (Policy and Charging Rule Function, PCRF), gateway (Serving Gateway, S-GW), packet data gateway (PDN Gateway, P-GW,) and packet data network (Packet Data Network, PDN).Below describe functions in detail:
Home subscriber server, be the permanent storage place of user contracting data, is positioned at the signing home network of user.
Mobility Management Entity, be the storage place of user contracting data in current network, be responsible for the Non-Access Stratum signaling management of terminal to network, the safety verification function of terminal, mobile management, the tracking under user's idle pulley and paging management function and the bearer management of terminal.
SGSN is global system for mobile communications (Global System for Mobile Communications, GSM) strengthen data transfer rate GSM evolution (Enhanced Data Rate for GSM Evolution, EDGE) wireless access network (GSM EDGE Radio Access Network, GERAN) and universal mobile telecommunications system (Universal Mobile Telecommunications System, UMTS) land radio access web (UMTS Terrestrial Radio Access Network, UTRAN) business support of user access core network network point, similar with Mobility Management Entity on function, being responsible for user's position upgrades, the functions such as paging management and bearer management.
Gateway, be the gateway that core net arrives wireless system, is responsible for terminal to the user plane bearer of core net, the data buffer storage under the terminal idle pulley, function, Lawful Interception and packet routing and the forwarding capability of network side initiating business request; Gateway is responsible for the situation that the counting user terminal is used wireless network, and produces the ticket that terminal is used wireless network, sends charging gateway to.
Packet data gateway, it is the gateway of evolution system and this system external packet data network, it is connected on internet and packet data network, be responsible for the functions such as Internet protocol (Internet Protocol, IP) address assignment, billing function, grouping packet filtering and policy control of terminal.
Packet data network, be the IP operation network of operator, and this network provides the IP service by the core net of operator for the user.
Policy charging rule functional entity is the server of being responsible for providing charging control, online credit control, thresholding control and service quality (Quality of Service, QoS) tactful aspect rule in evolution system.
Wireless access network, by evolution base station (Evolved NodeB, eNB) and 3G radio network controller (Radio Network Controllor, RNC) form, it mainly is responsible for the transmitting-receiving of wireless signal, by air interface and terminal contact, Radio Resource, scheduling of resource and the access control of management air interface.
When the user carries out Operational Visit, terminal can be initiated PDN (Packet Data Network, packet data network) connect process of establishing, the APN that MME/SGSN is corresponding according to the user institute use business of terminal to report selects gateway and gateway, sets up from the user's face passage between terminal-wireless base station-core net gateway (gateway and IAD).Figure 1 shows that user terminal in prior art receives/send the user plane path of data.
As can be seen from Figure 1, all data of user terminal all need through IAD (also being referred to as anchor gateway), even if two user's physical locations of intercommunication are very close mutually, the data communication between them also needs through IAD.This data transfer mode has increased the time delay of user data transmission and has taken the transfer resource of core net, reduced the resource utilization of core net, reduce user's experience, data are focused in anchor gateway simultaneously, have also increased the load of anchor gateway and transmission network.And all packets must pass through the IAD this point, caused again the bottleneck problem of IAD outstanding.Especially after the universal development of D2D (Device to Device, terminal-to-terminal service) business, route do not optimize and bottleneck problem can highlight more.For this situation, proposed to adopt straight-through tunnel approach the data path optimization while realizing intercommunication between the user.Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d are depicted as the data path while adopting user's intercommunication after the routing optimality scheme.As shown in Fig. 2 a, Fig. 2 b, Fig. 2 c, Fig. 2 d, after adopting the routing optimality scheme, the communication between two users, can be by the straight-through tunnel intercommunication between S-GW, also can be by the straight-through tunnel intercommunication between eNB.
But when the user is moved, because the eNB/S-GW of its access can revise, whether the straight-through tunnel of setting up before mobile so can also exist, and still needs to rebuild, upgrades or release, how to realize the management to this path, also there is no corresponding solution in prior art.Visible, when the local routing to lead directly to the tunnel embodiment lost efficacy, Correspondent Node (as eNB/S-GW) can not known this situation, therefore can't carry out effective path management.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and apparatus of realizing route management, when the local routing to lead directly to the tunnel embodiment lost efficacy, guarantees that Correspondent Node can carry out effective path management, and realizing route discharges.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of method of realizing route management, the method comprises:
When terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
Described terminal lost efficacy with the local routing that leads directly to tunnel and embody, and comprising: the terminal sexual behavior part that is moved causes the straight-through tunnel between wireless side network element/gateway to need to discharge;
Described mobility event comprises that S1 discharges Release, service request SR, tracing section updating TAU, switching HO.
The Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, comprising:
Straight-through tunnel between confirm between the wireless side network element/gateway of gateway needs to discharge, and gateway notice Correspondent Node wireless side network element/gateway discharges straight-through tunnel information.
When the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, to Correspondent Node wireless side network element/gateway, send straight-through tunnel failure indication, wherein comprise the identification information in the straight-through tunnel of inefficacy.
The mode that notice discharges straight-through tunnel information comprises:
Directly send described straight-through tunnel failure indication; Or,
Described straight-through tunnel failure indication is contained in packet and sends.
The path of described straight-through tunnel failure indication is:
Notify wireless side network element or the gateway of described Correspondent Node by the packet data gateway of core net; Or,
Between the wireless side network element or between the service network element, direct notice or by the Mobility Management Entity transfer.
In the situation that except mobility event S1 Release, before the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, also judge whether to set up the straight-through tunnel between the wireless side network element.
While judging whether to set up the straight-through tunnel between the wireless side network element,
For adopting the scene in the straight-through tunnel between the wireless side network element between terminal,
If judgment result is that passablely, determine to need initiate the process of establishing in straight-through tunnel between the wireless side network element;
If judgment result is that cannot, determine to need trigger the foundation in the straight-through tunnel of gateway, need to discharge relevant straight-through tunnel information on Correspondent Node wireless side network element simultaneously;
For adopting the scene in the straight-through tunnel between gateway between terminal,
If judgment result is that passablely, determine to need discharge the relevant straight-through tunnel information on gateway, initiate the process of establishing in straight-through tunnel between the wireless side network element simultaneously;
If judgment result is that cannot, determine to need trigger the foundation in straight-through tunnel between gateway, upgrade relevant straight-through tunnel information on the Correspondent Node gateway in straight-through tunnel establishment procedure.
Described Correspondent Node wireless side network element/gateway is also deleted the described straight-through tunnel information that will discharge according to the notice of receiving.
A kind of device of realizing route management, this device is used for:
When terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
Described terminal lost efficacy with the local routing that leads directly to tunnel and embody, and comprising: the terminal sexual behavior part that is moved causes the straight-through tunnel between wireless side network element/gateway to need to discharge;
Described mobility event comprises S1 Release, SR, TAU, HO.
This device is for gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for:
Straight-through tunnel between confirm between the wireless side network element/gateway needs to discharge, and notice Correspondent Node wireless side network element/gateway discharges straight-through tunnel information.
This device is gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for send straight-through tunnel failure indication to Correspondent Node wireless side network element/gateway, wherein comprise the identification information in the straight-through tunnel of inefficacy.
The mode that notice discharges straight-through tunnel information comprises:
Directly send described straight-through tunnel failure indication; Or,
Described straight-through tunnel failure indication is contained in packet and sends.
The path of described straight-through tunnel failure indication is:
Notify wireless side network element or the gateway of described Correspondent Node by the packet data gateway of core net; Or,
Between the wireless side network element or between the service network element, direct notice or by the Mobility Management Entity transfer.
This device is gateway; In the situation that except mobility event S1 Release, before the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, also for judging whether to set up the straight-through tunnel between the wireless side network element.
Described gateway when judging whether to set up the straight-through tunnel between the wireless side network element, for:
For adopting the scene in the straight-through tunnel between the wireless side network element between terminal,
If judgment result is that passablely, determine to need initiate the process of establishing in straight-through tunnel between the wireless side network element;
If judgment result is that cannot, determine to need trigger the foundation in the straight-through tunnel of gateway, need to discharge relevant straight-through tunnel information on Correspondent Node wireless side network element simultaneously;
For adopting the scene in the straight-through tunnel between gateway between terminal,
If judgment result is that passablely, determine to need discharge the relevant straight-through tunnel information on gateway, initiate the process of establishing in straight-through tunnel between the wireless side network element simultaneously;
If judgment result is that cannot, determine to need trigger the foundation in straight-through tunnel between gateway, upgrade relevant straight-through tunnel information on the Correspondent Node gateway in straight-through tunnel establishment procedure.
Described Correspondent Node wireless side network element/gateway is also deleted the described straight-through tunnel information that will discharge according to the notice of receiving.
The inventive method and device, when terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.Visible, the technology of realizing route management of the present invention, when the local routing to lead directly to the tunnel embodiment lost efficacy, guarantee that Correspondent Node can carry out effective path management, and realizing route discharges.
The accompanying drawing explanation
The data path schematic diagram of the cordless communication network that Fig. 1 is prior art;
The data path schematic diagram one that Fig. 2 a is the cordless communication network after available technology adopting routing optimality scheme;
The data path schematic diagram two that Fig. 2 b is the cordless communication network after available technology adopting routing optimality scheme;
The data path schematic diagram three that Fig. 2 c is the cordless communication network after available technology adopting routing optimality scheme;
The data path schematic diagram four that Fig. 2 d is the cordless communication network after available technology adopting routing optimality scheme;
The path management flow chart that Fig. 3 is the embodiment of the present invention one;
The path management flow chart that Fig. 4 is the embodiment of the present invention two;
The path management flow chart that Fig. 5 is the embodiment of the present invention three;
The path management flow chart that Fig. 6 a and Fig. 6 b are the embodiment of the present invention four;
The path management flow chart that Fig. 7 is the embodiment of the present invention five;
The path management flow chart that Fig. 8 a and Fig. 8 b are the embodiment of the present invention six;
The path management general flow chart that Fig. 9 is the embodiment of the present invention.
Embodiment
When the local routing to lead directly to the tunnel embodiment lost efficacy, can carry out effective path management in order to guarantee Correspondent Node, realizing route discharges, and can notify Correspondent Node eNB/S-GW to discharge straight-through tunnel information.Such as:
When terminal is moved the sexual behavior part (as S1 discharges (S1 Release), service request (SR), tracing section updating (TAU), switching (HO)), straight-through tunnel between confirm between eNB/S-GW of S-GW needs to discharge, and S-GW notice Correspondent Node eNB/S-GW discharges straight-through tunnel information.
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, so that those skilled in the art can better understand the present invention also, can be implemented, but illustrated embodiment is not as a limitation of the invention.
Following examples of the present invention be take the E-UTRAN system as example, and the wireless side network element of description Correspondent Node access/gateway obtains the release of straight-through tunnel (route optimization) and indicates, and discharges the related procedure in straight-through tunnel.All embodiment of the present invention all are applicable to UTRAN/GERAN access network and home base station system.If access UTRAN system, IAD is GGSN, and gateway is SGSN, and the wireless side network element is RNC; If access E-UTRAN system, IAD is P-GW, and gateway is S-GW, and the wireless side network element is eNB; If the access home base station system, identical with in E-UTRAN and UTRAN of IAD and gateway, the wireless side network element is H (e) NB or H (e) NB GW.
In the present invention, short and sweet in order to describe, used two nouns of terminal and Correspondent Node, wherein terminal refers to an end of initiating communication or business, Correspondent Node refers to and communicates with terminal or the other end of business.UE (subscriber equipment) 1 refers to terminal in the present invention, and UE2 refers to Correspondent Node.The eNB that eNB1 is UE1 access, the P-GW that P-GW1 is the UE1 access, the MME that MME1 is the UE1 access, eNB3 is the be moved eNB of rear new access of UE1, and P-GW3 is the be moved P-GW of rear new access of UE1, and MME3 is the be moved MME of rear new access of UE1.The eNB that eNB2 is Correspondent Node UE2 access, the P-GW that P-GW2 is Correspondent Node UE2 access, the MME that MME2 is the Correspondent Node access.The S-GW that S-GW is UE1 and the common access of Correspondent Node UE2.
In the present invention, in order to realize the optimization of route, introduced the straight-through tunnel between wireless side network element/gateway, therefore also can claim that the straight-through tunnel between wireless side network element/gateway is local routing.
In the present invention, because terminal and Correspondent Node all access identical S-GW, so the straight-through tunnel between the gateway related in the present invention, directly forwarded the data of terminal and Correspondent Node by identical gateway.
In the present invention, straight-through tunnel identification information refers to can be used for identifying the information in straight-through tunnel, its effect is in order to make IAD/gateway/wireless side network element to identify according to concrete sign content, confirm straight-through tunnel, specifically at least comprise one of following content, but be not limited only to following content: the IP address of terminal, the IMSI of terminal, the EPS bear ID (EPS bearing identification) of Correspondent Node, the RAB ID of Correspondent Node (radio bearer sign), the special carrying label of Correspondent Node, TEID and user's face address of the wireless side network element of Correspondent Node access.
The operable straight-through tunnel identification information of different network elements may be different, concrete, in an embodiment of the present invention:
1) the straight-through tunnel identification information that gateway and Mobility Management Entity are used is straight-through tunnel identification information 1.Specifically at least comprise one of following content, but be not limited only to following content: TEID and user's face address of the wireless side network element of the EPS bear ID (EPS bearing identification) of the IP address of terminal, the IMSI of terminal, Correspondent Node, the special carrying label of Correspondent Node, Correspondent Node access.
2) the straight-through tunnel identification information used between Mobility Management Entity and wireless side network element is straight-through tunnel identification information 2.Specifically at least comprise one of following content, but be not limited only to following content: TEID and user's face address of the wireless side network element of the special carrying label of the RAB ID of the IP address of terminal, the IMSI of terminal, Correspondent Node (radio bearer sign), Correspondent Node, Correspondent Node access.
3) the straight-through tunnel identification information used between gateway and wireless side network element is straight-through tunnel identification information 3.Specifically at least comprise one of following content, but be not limited only to following content: TEID and user's face address of the wireless side network element of the special carrying label of the IP address of terminal, the IMSI of terminal, Correspondent Node, Correspondent Node access.
Referring to Fig. 3, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 3, described when between the communication/traffic of terminal and Correspondent Node, adopting the straight-through tunnel between wireless side network element or gateway the handling process of S1 Release.Shown in Fig. 3, flow process comprises the following steps:
Step 301, need the signaling that discharges UE1 to connect and radio bearer if eNB1 detects, and eNB1 sends UE context releasing request message to MME1, carries release cause in message.When by eNB, initiating S1 Release flow process, need to carry out this step.If MME initiates S1 Release flow process, directly from step 302.
Step 302, MME1 sends and discharges the access bearer request message to S-GW, and request discharges the carrying of UE1.
Step 303, S-GW discharges the relevant information in the straight-through tunnel of local storage, comprises the corresponding relation of eNB sign and IP address.
For adopting the scene in the straight-through tunnel between eNB between UE1 and UE2, execution step 304-311.
Step 304, S-GW discharges the information relevant to eNB, and returns and discharge the access bearer response message to MME1.
Step 305, MME1 sends UE context release command message to eNB1, carries release cause in message.
Step 306, if the radio bearer of UE1 does not also discharge, eNB1 notice UE1 releasing wireless loading, and the context of deletion UE1.
Step 307, S-GW sends the MME2 of straight-through tunnel failure Indication message to Correspondent Node, carries straight-through tunnel identification information 1 in message.
The purpose of this message is that notice MME2 deletes straight-through tunnel relevant information, and this purpose can realize by newly-increased message, also can realize by revising existing message, and the title of message can be other title, as long as this message has realized above-mentioned purpose.
S-GW need to find all Correspondent Nodes with straight-through tunnel of UE1, and notifies the eNB of all Correspondent Nodes to discharge straight-through tunnel.Therefore this step may comprise multiple messages.For the Correspondent Node in same MME, these message can be merged into a piece of news, reexamine these Correspondent Nodes at the MME place and whether belong to same eNB, for what do not belong to same eNB, send separately message.Perhaps S-GW is used same message to send for the Correspondent Node in same MME, same eNB.
Step 308, MME2 sends the eNB2 of straight-through tunnel failure Indication message to Correspondent Node, carries straight-through tunnel identification information 3 in message.If that the straight-through tunnel identification information in step 307 1 adopts is the EPS bear ID of Correspondent Node, MME need to be revised as it RAB ID of corresponding Correspondent Node.
The purpose of this message is that notice eNB2 deletes straight-through tunnel relevant information, and this purpose can realize by newly-increased message, also can realize by revising existing message, and the title of message can be other title, as long as this message has realized above-mentioned purpose.
Step 309, the straight-through tunnel information that eNB2 finds eNB to safeguard according to straight-through tunnel identification information 3, and delete this information.Simultaneously optional, eNB2 can delete the TFT information of the UE2 on eNB2.
Step 310-311, eNB2 sends straight-through tunnel failure acknowledge message, and message is transmitted to S-GW by MME2.
In the present embodiment, step 307-311 can with step 304 executed in parallel.
For adopting the scene in the straight-through tunnel between gateway between UE1 and UE2, execution step 304a-307a.
Step 304a-306a, with step 304-306.
Step 307a, S-GW deletes the straight-through tunnel information of local maintenance.Simultaneously optional, S-GW can delete the TFT information of the UE2 on S-GW.Optionally, this step can not carried out, that is, the straight-through tunnel information on S-GW can not discharge in S1 Release process.
In the present embodiment, S-GW notice eNB2 is undertaken by chain of command message, needs by MME2 transfer chain of command message.Also having a kind of mode is to be undertaken by user's face, in this mode,
Step 307, S-GW builds special packet, will lead directly to the payload that tunnel failure Indication message (carrying straight-through tunnel identification information 3) is configured to bag in this packet, sends to the eNB2 of Correspondent Node by data surface.
Step 308 after eNB2 receives described packet, is taken out payload (straight-through tunnel failure Indication message) from bag, and the straight-through tunnel information that finds eNB2 to safeguard according to straight-through tunnel identification information 3, and deletes this information.Simultaneously optional, eNB2 can delete the TFT information of the UE2 on eNB2.
Step 309, eNB2 builds special packet, will lead directly to the payload that the tunnel failure acknowledge message is configured to bag in this packet, and send to S-GW by data surface.
When adopting the straight-through tunnel between gateway between the communication/traffic of terminal and Correspondent Node, when if in S1 Release flow process, the upper information about straight-through tunnel of S-GW remains unchanged, when terminal is initiated SR flow process or TAU flow process, because the user may be moved at Idle state, whether S-GW need to rejudge straight-through tunnel and can exist, in order to guarantee the correctness of the upper straight-through tunnel information of S-GW.
Referring to Fig. 4, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 4, described when adopting the straight-through tunnel between gateway between the communication/traffic of terminal and Correspondent Node, and gateway does not discharge while leading directly to tunnel information in S1 Release flow process the handling process of SR.Shown in Fig. 4, flow process comprises the following steps:
Step 401-402, when terminal has signaling or data to send, to the wireless side network element eNB3 transmission business request information of the new access of UE1, eNB3 sends business request information to Mobility Management Entity MME1.
Step 403, the authentication process of execution NAS.
Here, comprise the relevant information of terminal in described business request information, Mobility Management Entity determines whether to need to initiate authentication process accordingly, determines while needing, and carries out this step, determines while not needing, and does not carry out this step.
Step 404, after authentication process completes, MME1 sends initial context to eNB3 and sets up request message.
Step 405, eNB3 carries out the radio bearer process of establishing.
Step 406, after the radio bearer process of establishing completes, eNB3 replys initial context to MME1 and has set up message.
Step 407, after MME1 receives that initial context has been set up message, initiate to revise carrying request, the sign of wherein carrying eNB3 to S-GW.
Step 408, S-GW preserves the sign (sign of eNB3) of the wireless side network element of the new access of terminal, and sets up the corresponding relation of IP address of terminal and wireless side network element ID.
Step 409, S-GW need to re-start the judgement in following straight-through tunnel: judge whether to set up the straight-through tunnel between eNB;
If judgment result is that passablely, now need to discharge the relevant straight-through tunnel information on S-GW, initiate the process of establishing in straight-through tunnel between eNB simultaneously;
If judgment result is that cannot, need to trigger between S-GW the foundation in straight-through tunnel, upgrade relevant straight-through tunnel information on Correspondent Node S-GW in straight-through tunnel establishment procedure;
Step 410, if the judged result in step 409 is the information that needs to discharge the upper relevant straight-through tunnel of S-GW, need to carry out this step.S-GW deletes the straight-through tunnel information of local maintenance.Simultaneously optional, S-GW can delete the TFT information of the UE2 on S-GW.
Step 411, S-GW returns and revises bearing response message to MME1.
In the present embodiment, step 409-410 can with step 411 executed in parallel.
Referring to Fig. 5, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 5, described when adopting the straight-through tunnel between gateway between the communication/traffic of terminal and Correspondent Node, and gateway does not discharge while leading directly to tunnel information in S1 Release flow process the handling process of TAU.Shown in Fig. 5, flow process comprises the following steps:
Step 501,502, after fast mobile terminal, to the wireless side network element eNB3 transmission tracing section updating request message of new access, eNB3 sends the tracing section updating request message to the new Mobility Management Entity MME1 selected for terminal.
Step 503, when new Mobility Management Entity determines that when not identical with former Mobility Management Entity, new Mobility Management Entity is to former Mobility Management Entity transmission context request message.After former Mobility Management Entity is received context request message, the context response information of the contextual information that comprises terminal to new Mobility Management Entity.
Step 504, after new Mobility Management Entity is received context response information, initiate authorizing procedure.
Here, if newly Mobility Management Entity is according to the contextual information of terminal, determine while needing to initiate authorizing procedure, carry out this step, determine while not needing to initiate authorizing procedure, do not carry out this step.
Step 505, new Mobility Management Entity is preserved the contextual information of described terminal, and responds the context acknowledgement message to former Mobility Management Entity.
Step 506, after MME3 sends beginning context acknowledgement message, initiate to revise carrying request, the sign of wherein carrying eNB3 to S-GW.
Step 507-509, with step 408-410.In this step, S-GW carries out with new Mobility Management Entity alternately.
Step 510, S-GW returns and revises bearing response message to new Mobility Management Entity.
Step 511, new Mobility Management Entity is to Authentication Authorization server launch position new technological process more.
Step 512, after position update flow completes, the Authentication Authorization server is deleted flow process to former Mobility Management Entity launch position.
Step 513, when new Mobility Management Entity determines the carrying of activated terminals not, new Mobility Management Entity sends tracing section updating to eNB3 and accepts message, and is transmitted to UE1 by eNB3.
Step 514, UE1 sends tracing section updating to eNB3 and completes message, and is transmitted to MME3 by eNB3.
Referring to Fig. 6, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 6, described when between the communication/traffic of terminal and Correspondent Node, adopting the straight-through tunnel between wireless side network element/gateway, and the X2 switching flow that S-GW changes does not occur.Shown in Fig. 6, flow process comprises the following steps:
Step 601, when source wireless side network element eNB1 finds that cell signal that terminal is current accessed is lower than threshold value, initiate the X2 switching flow; The eNB3 of eNB1 and its selection is mutual, completes preparation and the execution of X2 switching, and the radio bearer of UE1 is switched to eNB3 from eNB1.Now eNB1 can forward the data of UE1 to eNB3.
Step 602, eNB3 sends Path Switch Req message to MME1, and notice UE1 switches, and carries the sign of eNB3 in message.
Step 603, MME1 initiates to revise carrying request, the sign of wherein carrying eNB3 to S-GW.
Step 604, S-GW preserves the sign (sign of eNB3) of the wireless side network element of the new access of terminal, and sets up the corresponding relation of IP address of terminal and wireless side network element ID.
Step 605, S-GW need to re-start the judgement in following straight-through tunnel: judge whether to set up the straight-through tunnel between eNB;
For adopting the scene in the straight-through tunnel between eNB between UE1 and UE2,
If judgment result is that passablely, need to initiate the process of establishing in straight-through tunnel between eNB;
If judgment result is that cannot, trigger the foundation in the straight-through tunnel of S-GW, need to discharge the upper relevant straight-through tunnel information of Correspondent Node eNB2 simultaneously.
For adopting the scene in the straight-through tunnel between gateway between UE1 and UE2,
If judgment result is that passablely, now need to discharge the relevant straight-through tunnel information on S-GW, initiate the process of establishing in straight-through tunnel between eNB simultaneously;
If judgment result is that cannot, trigger the foundation in the straight-through tunnel of S-GW, upgrade the relevant straight-through tunnel information on S-GW.
For adopting the scene in the straight-through tunnel between eNB between UE1 and UE2, execution step 606-613.
Step 606, if in step 605, judged result is the information that needs to discharge the straight-through tunnel on Correspondent Node eNB2, needs to perform step 606-610.The processing of this step is with the processing of step 307.
Step 607-610, with step 308-311.
Step 611, S-GW sends and revises bearing response message to MME1.
In the present embodiment, step 606-610 can with step 611 executed in parallel.
Step 613, eNB3 notice eNB1 carries out resource release.
For adopting the scene in the straight-through tunnel between gateway between UE1 and UE2, execution step 606a-609a.
Step 606a, if in step 605, judged result is the information that needs to discharge the straight-through tunnel on S-GW, S-GW deletes the straight-through tunnel information of local maintenance.Simultaneously optional, S-GW can delete the TFT information of the UE2 on S-GW.Optionally, this step can not carried out, that is, the straight-through tunnel information on S-GW can not discharge in handoff procedure.
Step 607a-609a, with step 611-613.
The present embodiment also can adopt another mode to realize: do not perform step the judgement in 605 during switching, directly discharge the upper relevant straight-through tunnel information of Correspondent Node eNB/S-GW, after to be switched completing, S-GW does the judgement of leading directly to tunnel after receiving packet more again.
The present embodiment can adopt the mode of special data package to realize equally, S-GW notice eNB2 discharges the message (being step 606-601) in straight-through tunnel, can realize by building special data package, packet is transmitted on the user's face between S-GW and eNB.
Referring to Fig. 7, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 7, described when between the communication/traffic of terminal and Correspondent Node, adopting the straight-through tunnel between the wireless side network element X2 switching flow that S-GW changes.Shown in Fig. 7, flow process comprises the following steps:
Step 701-704, with step 601-605.In this step, eNB3 and intended gateway S-GW3 are mutual.
Step 705,706, S-GW3 initiates to revise the carrying flow process to the P-GW of UE1.
Step 707, S-GW3 returns to session establishment and responds to MME1.
Step 708, MME1 sends Path switch Ack message to eNB3.
Step 709, eNB3 notice eNB1 carries out resource release.
Step 710, MME1 deletes flow process to former S-GW initiation session.
Step 711, former S-GW discharges the relevant information of UE1, and notice Correspondent Node eNB2 discharges straight-through tunnel.Former S-GW sends the MME2 of straight-through tunnel failure Indication message to Correspondent Node, carries straight-through tunnel identification information 1 in message.
The purpose of this message is that notice MME2 deletes straight-through tunnel relevant information, and this purpose can realize by newly-increased message, also can realize by revising existing message, and the title of message can be other title, as long as this message has realized above-mentioned purpose.
Former S-GW need to find all Correspondent Nodes with straight-through tunnel of UE1, and notifies the eNB of all Correspondent Nodes to discharge straight-through tunnel.Therefore this step may comprise multiple messages.For the Correspondent Node in same MME, these message can be merged into a piece of news, reexamine these Correspondent Nodes at the MME place and whether belong to same eNB, for what do not belong to same eNB, send separately message.Perhaps S-GW is used same message to send for the Correspondent Node in same MME, same eNB.
Step 712-715, with step 308-311.
The present embodiment can adopt the mode of special data package to realize equally, former S-GW notice eNB2 discharges the message (being step 711-715) in straight-through tunnel, can realize by building special data package, packet transmits on the user's face between S-GW and eNB.
Referring to Fig. 8, the E-UTRAN connecting system that is applicable to embodiment illustrated in fig. 8, described when between the communication/traffic of terminal and Correspondent Node, adopting the straight-through tunnel between wireless side network element/gateway the S1 switching flow.Shown in Fig. 8, flow process comprises the following steps:
Step 801, when former wireless side network element eNB1 finds that cell signal that terminal is current accessed is lower than threshold value, initiate the S1 switching flow; Here, the wireless signal of terminal meeting this community of cycle detection and other neighbor cell, with the former wireless side network element of offering of measurement report in form.Now, former wireless side network element can select an applicable Target Wireless side network element eNB3 of signal strength signal intensity to initiate switching flow.
Step 802, former wireless side network element eNB1 sends handover request message to former Mobility Management Entity MME1.
Step 803, after former Mobility Management Entity is received handover request message, send the forward RELOCATION REQUEST message to target mobility management entity MME3.
After step 804,805: target mobility management entity MME3 receives the forward RELOCATION REQUEST message, to destination service gateway S-GW3 initiation session Establishing process; Here, in handoff procedure, while not changing for the gateway of Terminal Service, do not carry out this step.
Step 806: target mobility management entity MME3 sends handover request message to Target Wireless side network element eNB3.
Step 807, Target Wireless side network element eNB3 is the reserved resource of UE1, and responds switching request acknowledgement message to target mobility management entity MME3.
Step 808, if need between S-GW, set up the indirect data forwarding tunnel, MME3 initiates the Establishing process of indirect forwarding tunnel.
Step 809, MME3 responds the forward relocation response message to MME1.
Step 810, if need between S-GW, set up the indirect data forwarding tunnel, MME1 initiates the Establishing process of indirect forwarding tunnel.
Step 811,811a, MME1 sends switching command to eNB1, and eNB1 is transmitted to UE1.
Step 812a-812d, may carry out state transfer between eNB1 and eNB3.
Step 813, UE1 is switched to eNB3, and sends switching authentic information to eNB3.
Step 814, eNB3 sends handoff notification message to MME3.
Step 815, the mutual forward reorientation of MME3 and MME1 completes.
Step 816, MME3 initiates to revise carrying request, the sign of wherein carrying eNB3 to S-GW3.
Step 817, S-GW3 preserves the sign (sign of eNB3) of the wireless side network element of the new access of terminal, and sets up the corresponding relation of IP address of terminal and wireless side network element ID.
Step 818, S-GW3 initiates to revise carrying request, the sign of wherein carrying eNB3 to the P-GW of UE1.
The scene do not changed for S-GW in handoff procedure, execution step 819-824.Now S-GW is identical with S-GW3.
Step 819, S-GW is the judgement in following straight-through tunnel again: judge whether to set up the straight-through tunnel between eNB;
For adopting the scene in the straight-through tunnel between eNB between UE1 and UE2,
If judgment result is that passablely, need to initiate the process of establishing in straight-through tunnel between eNB;
If judgment result is that cannot, trigger the foundation in the straight-through tunnel of S-GW, need to discharge the upper relevant straight-through tunnel information of Correspondent Node eNB2 simultaneously.
For adopting the scene in the straight-through tunnel between gateway between UE1 and UE2,
If judgment result is that passablely, now need to discharge the relevant straight-through tunnel information on S-GW, initiate the process of establishing in straight-through tunnel between eNB simultaneously;
If judgment result is that cannot, trigger the foundation in the straight-through tunnel of S-GW, upgrade the relevant straight-through tunnel information on S-GW.
Step 820, if in step 819, judged result is the information that needs to discharge the straight-through tunnel on Correspondent Node eNB2, needs to perform step 820-826, the processing of this step is with the processing of step 307.S-GW3 and MME2 intercommunication in this step.
If in step 819, judged result is the information that needs to discharge the straight-through tunnel on S-GW, and S-GW deletes the straight-through tunnel information of local maintenance, no longer performs step 821-826.Simultaneously optional, S-GW can delete the TFT information of the UE2 on S-GW.Optionally, the straight-through tunnel information on S-GW can not discharge in handoff procedure.
Step 821-824, with step 308-311.S-GW3 and MME2 intercommunication in this step.
Step 825,826, P-GW sends and revises bearing response message to S-GW3, and S-GW3 is transmitted to MME3.
In the present embodiment, step 819-824 can with step 818 executed in parallel.
Step 828, former wireless side network element, former gateway, former MME resource release flow.
The scene changed for S-GW in handoff procedure, and adopt the scene in the straight-through tunnel between eNB between UE1 and UE2, execution step 829-833.
Step 829, after switching completes, during the S-GW releasing resource (step 828), notice Correspondent Node eNB discharges straight-through tunnel information.
Step 829-833, with step 820-824.In this step, S-GW and MME2 intercommunication.
The present embodiment also can adopt another mode to realize: do not perform step the judgement in 819 during switching, directly discharge the upper relevant straight-through tunnel information of Correspondent Node eNB/S-GW, after to be switched completing, S-GW does the judgement of leading directly to tunnel after receiving packet more again.
The present embodiment can adopt the mode of special data package to realize equally, the message that S-GW notice eNB2 discharges straight-through tunnel (is step 820-824,829-833), can realize by building special data package, packet transmits on the user's face between S-GW and eNB.
Visible in conjunction with above description, the operation thinking of realizing route management of the present invention can mean flow process as shown in Figure 9, and this flow process comprises the following steps:
Step 910: the local routing inefficacy that terminal embodies to lead directly to tunnel.
Step 920: the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
Visible in conjunction with above description, the device of realizing route management of the present invention can be used for:
When terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
Described terminal lost efficacy with the local routing that leads directly to tunnel and embody, and comprising: the terminal sexual behavior part that is moved causes the straight-through tunnel between wireless side network element/gateway to need to discharge;
Described mobility event comprises S1 Release, SR, TAU, HO.
This device is for gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for:
Straight-through tunnel between confirm between the wireless side network element/gateway needs to discharge, and notice Correspondent Node wireless side network element/gateway discharges straight-through tunnel information.
This device is gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for send straight-through tunnel failure indication to Correspondent Node wireless side network element/gateway, wherein comprise the identification information in the straight-through tunnel of inefficacy.
The mode that notice discharges straight-through tunnel information comprises:
Directly send described straight-through tunnel failure indication; Or,
Described straight-through tunnel failure indication is contained in packet and sends.
The path of described straight-through tunnel failure indication is:
Notify wireless side network element or the gateway of described Correspondent Node by the packet data gateway of core net; Or,
Between the wireless side network element or between the service network element, direct notice or by the Mobility Management Entity transfer.
This device is gateway; In the situation that except mobility event S1 Release, before the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, also for judging whether to set up the straight-through tunnel between the wireless side network element.
Described gateway when judging whether to set up the straight-through tunnel between the wireless side network element, for:
For adopting the scene in the straight-through tunnel between the wireless side network element between terminal,
If judgment result is that passablely, determine to need initiate the process of establishing in straight-through tunnel between the wireless side network element;
If judgment result is that cannot, determine to need trigger the foundation in the straight-through tunnel of gateway, need to discharge relevant straight-through tunnel information on Correspondent Node wireless side network element simultaneously;
For adopting the scene in the straight-through tunnel between gateway between terminal,
If judgment result is that passablely, determine to need discharge the relevant straight-through tunnel information on gateway, initiate the process of establishing in straight-through tunnel between the wireless side network element simultaneously;
If judgment result is that cannot, determine to need trigger the foundation in straight-through tunnel between gateway, upgrade relevant straight-through tunnel information on the Correspondent Node gateway in straight-through tunnel establishment procedure.
Described Correspondent Node wireless side network element/gateway is also deleted the described straight-through tunnel information that will discharge according to the notice of receiving.
Visible in sum, no matter be method or device, the technology of realizing route management of the present invention, when the local routing to lead directly to the tunnel embodiment lost efficacy, in order to guarantee that Correspondent Node can carry out effective path management, realizing route discharges, and can notify Correspondent Node wireless side network element/gateway to discharge straight-through tunnel information.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with general calculation element, they can concentrate on single calculation element, perhaps be distributed on the network that a plurality of calculation elements form, alternatively, they can be realized with the executable program code of calculation element, thereby they can be stored in storage device and be carried out by calculation element, perhaps they are made into respectively to each integrated circuit modules, perhaps a plurality of modules in them or step being made into to the single integrated circuit module realizes.Like this, the present invention is not restricted to any specific hardware and software combination.
The above, be only preferred embodiment of the present invention, is not intended to limit protection scope of the present invention.
Claims (18)
1. the method for a realizing route management, is characterized in that, the method comprises:
When terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
2. method according to claim 1, is characterized in that, described terminal lost efficacy with the local routing that leads directly to tunnel and embody, and comprising: the terminal sexual behavior part that is moved causes the straight-through tunnel between wireless side network element/gateway to need to discharge;
Described mobility event comprises that S1 discharges Release, service request SR, tracing section updating TAU, switching HO.
3. method according to claim 2, is characterized in that, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, comprising:
Straight-through tunnel between confirm between the wireless side network element/gateway of gateway needs to discharge, and gateway notice Correspondent Node wireless side network element/gateway discharges straight-through tunnel information.
4. according to the described method of claims 1 to 3 any one, it is characterized in that, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, send straight-through tunnel failure indication to Correspondent Node wireless side network element/gateway, wherein comprise the identification information in the straight-through tunnel of inefficacy.
5. method according to claim 4, is characterized in that, the mode that notice discharges straight-through tunnel information comprises:
Directly send described straight-through tunnel failure indication; Or,
Described straight-through tunnel failure indication is contained in packet and sends.
6. method according to claim 4, is characterized in that, the path of described straight-through tunnel failure indication is:
Notify wireless side network element or the gateway of described Correspondent Node by the packet data gateway of core net; Or,
Between the wireless side network element or between the service network element, direct notice or by the Mobility Management Entity transfer.
7. according to the described method of claims 1 to 3 any one, it is characterized in that, in the situation that except mobility event S1 Release, before the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, also judge whether to set up the straight-through tunnel between the wireless side network element.
8. method according to claim 7, is characterized in that, while judging whether to set up the straight-through tunnel between the wireless side network element,
For adopting the scene in the straight-through tunnel between the wireless side network element between terminal,
If judgment result is that passablely, determine to need initiate the process of establishing in straight-through tunnel between the wireless side network element;
If judgment result is that cannot, determine to need trigger the foundation in the straight-through tunnel of gateway, need to discharge relevant straight-through tunnel information on Correspondent Node wireless side network element simultaneously;
For adopting the scene in the straight-through tunnel between gateway between terminal,
If judgment result is that passablely, determine to need discharge the relevant straight-through tunnel information on gateway, initiate the process of establishing in straight-through tunnel between the wireless side network element simultaneously;
If judgment result is that cannot, determine to need trigger the foundation in straight-through tunnel between gateway, upgrade relevant straight-through tunnel information on the Correspondent Node gateway in straight-through tunnel establishment procedure.
9. method according to claim 1, is characterized in that, described Correspondent Node wireless side network element/gateway is also deleted the described straight-through tunnel information that will discharge according to the notice of receiving.
10. the device of a realizing route management, is characterized in that, this device is used for:
When terminal lost efficacy with the local routing that leads directly to the tunnel embodiment, the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information.
11. device according to claim 10, is characterized in that, described terminal lost efficacy with the local routing that leads directly to tunnel and embody, and comprising: the terminal sexual behavior part that is moved causes the straight-through tunnel between wireless side network element/gateway to need to discharge;
Described mobility event comprises S1 Release, SR, TAU, HO.
12. device according to claim 11, is characterized in that, this device is for gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for:
Straight-through tunnel between confirm between the wireless side network element/gateway needs to discharge, and notice Correspondent Node wireless side network element/gateway discharges straight-through tunnel information.
13. according to the described device of claim 9 to 11 any one, it is characterized in that, this device is gateway, when the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, for send straight-through tunnel failure indication to Correspondent Node wireless side network element/gateway, wherein comprise the identification information in the straight-through tunnel of inefficacy.
14. device according to claim 13, is characterized in that, the mode that notice discharges straight-through tunnel information comprises:
Directly send described straight-through tunnel failure indication; Or,
Described straight-through tunnel failure indication is contained in packet and sends.
15. device according to claim 13, is characterized in that, the path of described straight-through tunnel failure indication is:
Notify wireless side network element or the gateway of described Correspondent Node by the packet data gateway of core net; Or,
Between the wireless side network element or between the service network element, direct notice or by the Mobility Management Entity transfer.
16. according to the described device of claim 9 to 11 any one, it is characterized in that, this device is gateway; In the situation that except mobility event S1 Release, before the Correspondent Node wireless side network element of notification terminal/gateway discharges straight-through tunnel information, also for judging whether to set up the straight-through tunnel between the wireless side network element.
17. device according to claim 16, is characterized in that, described gateway when judging whether to set up the straight-through tunnel between the wireless side network element, for:
For adopting the scene in the straight-through tunnel between the wireless side network element between terminal,
If judgment result is that passablely, determine to need initiate the process of establishing in straight-through tunnel between the wireless side network element;
If judgment result is that cannot, determine to need trigger the foundation in the straight-through tunnel of gateway, need to discharge relevant straight-through tunnel information on Correspondent Node wireless side network element simultaneously;
For adopting the scene in the straight-through tunnel between gateway between terminal,
If judgment result is that passablely, determine to need discharge the relevant straight-through tunnel information on gateway, initiate the process of establishing in straight-through tunnel between the wireless side network element simultaneously;
If judgment result is that cannot, determine to need trigger the foundation in straight-through tunnel between gateway, upgrade relevant straight-through tunnel information on the Correspondent Node gateway in straight-through tunnel establishment procedure.
18. device according to claim 10, is characterized in that, described Correspondent Node wireless side network element/gateway is also deleted the described straight-through tunnel information that will discharge according to the notice of receiving.
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