CN102227935B - Switch processing method, method and device for relocating terminal path - Google Patents

Switch processing method, method and device for relocating terminal path Download PDF

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Publication number
CN102227935B
CN102227935B CN200980146460.2A CN200980146460A CN102227935B CN 102227935 B CN102227935 B CN 102227935B CN 200980146460 A CN200980146460 A CN 200980146460A CN 102227935 B CN102227935 B CN 102227935B
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gateway
target
base station
mobile node
path
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CN102227935A (en
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张亮亮
彭炎
李亚娟
常俊仁
王燕
焦斌
陈卓
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Changshu intellectual property operation center Co.,Ltd.
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/12—Reselecting a serving backbone network switching or routing node

Abstract

A switch processing method and a base station are disclosed. Said method includes: after a mobile node switches to a target base station, the gateway of said mobile node is relocated to said target base station (S31); the target base station provides the gateway function for said mobile node (S32). The above technical solution enables the gateway of the mobile node to be relocated to said target base station and enables the target base station to perform the gateway function, thus benefiting the communication between mobile node and target base station.

Description

Switching handling method and end path change method and apparatus
Technical field
The present invention relates to communication technical field, particularly a kind of switching handling method and end path change method and apparatus.
Background technology
Fig. 1 is a kind of schematic diagram of wireless access network, this network comprises a donor base station (DeNB, DonoreNodeB), 3 subscriber equipmenies (UE, User Equipment) of a via node (RN, Relay Node) and this via node subordinate.Described each subscriber equipment is a terminal namely, and 3 terminals are labeled as respectively UE1, UE2 and UE3, and the interface between they and RN is Uu mouth; Interface between RN and DeNB is Un mouth.In addition, DeNB interface is each other called as X2 interface; Interface between DeNB and mobile management entity (MME, Mobility Management Entity) or gateway (GW, Gateway) is S1 interface.Along with the development of Long Term Evolution (LTE, Long Term Evolution) technology, it is more and more abundanter that the function of base station is becoming, and makes part base station can realize the function of gateway.For example, the function of Tandem Gateway can be realized in a base station, be the SGW (ServingGateway that base station can comprise RN, gateway) and PGW (Packet Data Network Gateway, grouped data network gateway) part or all of function, also can only comprise the part or all of function of the PGW of RN.
In LTE-A (LTE-Advance, the evolution of LTE) system, when via node has mobility, this via node just becomes a mobile relay node (MRN, Mobile RN).In comprising the system of MRN, when MRN is moved, MRN may need as UE, from a DeNB, is switched to another DeNB, produces the switching of MRN.Here before switching, for MRN provides the DeNB of service, be called source base station, the DeNB that need to be switched to is called target BS.
At least there is following defect in prior art: when base station integrated during Tandem Gateway function, if MRN is switched to target BS from source base station, can cause Tandem Gateway at source base station place, MRN communicates by letter with target BS and can cause time delay to increase problem.Same problem also may appear on UE, for example the local routing gateway at UE is for example integrated in, under the scene of local wireless access network node (base station), when UE is switched to target BS from source base station, if the local routing gateway function execution point of UE is still on source base station, can cause the increase of source base station communication delay, data jamming even occurs when serious.
Summary of the invention
The embodiment of the present invention provides a kind of switching handling method and end path change method and apparatus, realizes Tandem Gateway change after mobile node is switched to target BS, is conducive to communicating by letter of mobile node and target BS; And can conveniently realize the change of end path.
The embodiment of the present invention provides a kind of switching handling method, comprising:
When mobile node is switched to after target BS, the gateway of described mobile node is altered to described target BS;
Target BS provides gateway function for described mobile node.
The embodiment of the present invention also provides a kind of base station, comprising:
Change module, for being switched to when mobile node behind this base station, is altered to this base station by the gateway of described mobile node;
Gateway module, is used to described mobile node that gateway function is provided.
The embodiment of the present invention also provides a kind of end path change method, comprising:
RX path handover request message, described path handover request message comprises the information of at least 2 terminals, described at least 2 terminals belong to fast mobile terminal management entity, and described path handover request message is for asking the end path of described fast mobile terminal management entity to be switched to target BS;
The end path of described fast mobile terminal management entity is switched to target BS.
The embodiment of the present invention also provides a kind of fast mobile terminal management entity, comprising:
The second receiver module, for RX path handover request message, described path handover request message comprises the information of at least 2 terminals, described at least 2 terminals belong to fast mobile terminal management entity, and described path handover request message is for asking the end path of described fast mobile terminal management entity to be switched to target BS;
The first change module, for being switched to described target BS by the end path of described mobile management entity.
The embodiment of the present invention also provides a kind of end path change method, comprising:
Receive and revise bearing request message, described modification bearing request message comprises the information of at least 2 terminals, and described at least 2 terminals belong to a gateway, and described modification bearing request message connects user's face to be switched to target BS for notice;
User's face is connected and is switched to target BS.
The embodiment of the present invention also provides a kind of gateway, comprising:
The 3rd receiver module, be used for receiving modification bearing request message, described modification bearing request message comprises the information of at least 2 terminals, and described at least 2 terminals belong to described gateway, and described modification bearing request message connects user's face to be switched to target BS for notice;
The second change module, for connecting user's face to be switched to target BS.
From such scheme, the embodiment of the present invention can be altered to described target BS by the gateway of mobile node, makes target BS provide gateway function for mobile node, is conducive to communicating by letter of mobile node and target BS.Technique scheme also can realize the path change to a plurality of terminals by a piece of news.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of wireless access network;
The schematic diagram of a kind of switching handling method that Fig. 2 provides for the embodiment of the present invention one;
The flow chart of a kind of switching handling method that Fig. 3 provides for the embodiment of the present invention three;
The schematic diagram of the IP address assignment method of a kind of MRN that Fig. 4 provides for the embodiment of the present invention four;
The flow chart of a kind of switching handling method that Fig. 5 provides for the embodiment of the present invention five;
The schematic diagram of a kind of switching handling method that Fig. 6 provides for the embodiment of the present invention six;
The schematic diagram of a kind of switching handling method that Fig. 7 provides for the embodiment of the present invention seven;
The schematic diagram of a kind of switching handling method that Fig. 8 provides for the embodiment of the present invention eight;
The schematic diagram of a kind of switching handling method that Fig. 9 provides for the embodiment of the present invention nine;
The schematic diagram of a kind of switching handling method that Figure 10 provides for the embodiment of the present invention ten;
The schematic diagram of a kind of switching handling method that Figure 11 provides for the embodiment of the present invention 11;
The schematic diagram of a kind of switching handling method that Figure 12 provides for the embodiment of the present invention 12;
The schematic diagram of a kind of end path change method that Figure 13 provides for the embodiment of the present invention 13;
The schematic diagram of a kind of end path change method that Figure 14 provides for the embodiment of the present invention 14;
The schematic diagram of a kind of end path change method that Figure 15 provides for the embodiment of the present invention 15;
The schematic diagram of a kind of switching handling method that Figure 16 provides for the embodiment of the present invention 16;
The schematic diagram of a kind of base station that Figure 17 provides for the embodiment of the present invention 17;
The schematic diagram of a kind of base station that Figure 18 provides for the embodiment of the present invention 18;
The schematic diagram of a kind of base station that Figure 19 provides for the embodiment of the present invention 19;
The schematic diagram of a kind of terminal MME that Figure 20 provides for the embodiment of the present invention 20;
The schematic diagram of a kind of terminating gateway that Figure 21 provides for the embodiment of the present invention 21;
The schematic diagram of a kind of switching handling method that Figure 22 provides for the embodiment of the present invention 22;
The schematic diagram of a kind of switching handling method that Figure 23 provides for the embodiment of the present invention 23.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention are described in detail.It should be noted that, following examples are only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment of the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The embodiment of the present invention may relate to the information interaction between multiple communication entity, now the definition of each communication entity is carried out to brief description.UE is subscriber equipment, that is to say terminal; ENB is base station; MRN is mobile relay node; It can realize and switching as a terminal between different base station; Via node is below can be referred to as relaying; Source base station is the MRN serving BS before MRN switches; Target BS is the MRN serving BS after MRN switches; Relaying MME is the mobile management entity of MRN; Terminal MME is the mobile management entity of terminal; Terminating gateway is that the gateway of service is provided for terminal, and it comprises SGW and the PGW function of terminal; Tandem Gateway namely provides the gateway of service for MRN; Junction network gateway is the PGW of MRN, and the SGW that relay services gateway is MRN.UE in the present embodiment and MRN can be referred to as mobile node, and they can switch as node movably between different base station.In embodiments of the present invention, can be in conjunction with the part or all of function of MRN Tandem Gateway in base station, being MRN provides the function of the Tandem Gateway of service by base station, to be realized whole or in part.Target BS can be gathered Tandem Gateway function or carry out Tandem Gateway function: target BS can be realized PGW function or SGW function or other gateway function (as home eNB gateway) of MRN or realize above-mentioned multiple gateway function simultaneously.In one case, all or part of function of SGW and the PGW of MRN can be realized in base station; In another case, all or part of function of the PGW of MRN also can only be realized in base station.When the SGW of MRN and all or part of function of PGW can be realized in base station, base station is SGW and the PGW of MRN namely.When all or part of function of PGW of MRN can be realized in base station, base station is the PGW of MRN namely; Now the SGW of MRN is an independently entity, and within being not included in base station, or the SGW of MRN does not exist.Further, base station can also comprise the function of home eNB (HeNB) gateway function or similar home eNB (HeNB) gateway.For example, base station can via node and core net (EPC-Evolved Packet Core network, Evolved Packet Core) between carry out the function of HeNB gateway.For example, MME can transmit S1-AP message to described base station, base station is after receiving S1-AP message, at the interface of connection MME and the interface of connection via node, correspondingly revise S1-AP TEIDs, other parts remain unchanged, this processing procedure correspondence S1-AP mechanism, and HeNB gateway function is similar.MME seems to link together with base station; Via node looks like with MME and links together.
The schematic diagram of a kind of switching handling method that Fig. 2 provides for the embodiment of the present invention one, the method comprises:
S21: when mobile relay node is switched to after target BS, target BS is altered to described target BS by the gateway of described mobile relay node, and described target BS can be realized Tandem Gateway function;
S22: target BS provides gateway function for mobile relay node.
This method embodiment is altered to described target BS by the gateway of described mobile relay node, impels described target BS for described mobile relay node provides gateway function, makes the gateway handoff of MRN to target BS, is conducive to communicating by letter of MRN and target BS.The gateway of described mobile relay node is altered to described target BS and namely former gateway (source base station) function of mobile relay node is transferred to object gateway (the gateway function entity in target BS).In actual applications, the function of part gateway in source base station can be transferred to target BS, also whole gateway functions of source base station can be altered to target BS.The gateway of described mobile relay node is altered to described target BS to be comprised: the address or the identifier that by the gateway destination address of mobile relay node, are described target BS.
Described method can further comprise: for described mobile relay node distributes an IP address, and described IP address is offered to described mobile relay node.The IP address that is appreciated that distribution can be identical or different with the former IP address of described mobile relay node.
Further, described method comprises: the gateway information of the MRN that reception sources base station provides.Target BS comprises for mobile relay node provides gateway function: the gateway information that target BS utilizes described MRN provides gateway function for MRN.The gateway information of MRN is: for MRN provides gateway function needed information.
Further, described method also comprises: the relaying MME of notice MRN is switched to described target BS by gateway path.In this step, can notify the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and mobile node gateway, path change is described mobile node and mobile node new gateway; And notify the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and source base station, path change is described mobile node and described target BS.Particularly, can notify the serving BS change of this Tandem Gateway change of relaying MME and relaying, making the route diversion between relaying MME and source Tandem Gateway (in source base station entity) is the path between relaying MME and new Tandem Gateway (gateway in target BS entity), and the route diversion between relaying MME and source base station is the path between relaying MME target BS.Set up thus relaying MME and be connected with the chain of command of relay services base station (target BS), and set up the connection of relaying MME and Tandem Gateway, and then MME can realize information interaction with the target BS of integrated Tandem Gateway function.
Target BS can be realized Tandem Gateway function: target BS can be realized PGW function or SGW function or other gateway function of MRN or realize above-mentioned multiple gateway function simultaneously.
The gateway of described mobile relay node is altered to described target BS namely to be transferred to the gateway function of source base station among target BS.Be appreciated that in base station and gathered multiple gateway function, during as multiple gateway functions such as PGW, SGW, HeNB gateway or other gateways, source base station can only be transferred to target BS by the part gateway function in its multiple gateway function.
In one application, the described gateway by described mobile relay node is altered to described target BS and comprises: the junction network gateway of described mobile relay node and relay services gateway are altered to described target BS.In target BS, the whole and partial function of integrated junction network gateway and relay services gateway, can all be altered to target BS by junction network gateway and relay services gateway address.
In another kind application, the described gateway by described mobile relay node is altered to described target BS and comprises: the junction network gateway of described mobile relay node is altered to described target BS.Further, also can comprise: notify the gateway of mobile relay node described in the relay services gateway of described mobile relay node to change, make relay services gateway that its gateway path is switched to described target BS.The integrated whole and partial function of junction network gateway in target BS, or integrated junction network gateway and other gateway functions (as home eNB GW) function, other gateway address in junction network gateway address and/or base station directly can be notified to this gateway (being the gateway entity in base station), a kind of mode is in addition first by informing relaying MME, and then notified to this gateway by relaying MME, make it to carry out route diversion, be convenient to realize communicating by letter and data interaction of relay services gateway and gateway entity in target BS and base station entity.
The embodiment of the present invention two provides a kind of switching handling method, and the method is applied to following scene: MRN is switched to target BS, and target BS is altered to described target BS by the gateway of MRN.Described method comprises: the gateway information of MRN is provided to target BS, and to indicate described target BS Tandem Gateway to be altered to described target BS knowing after MRN is switched to described target BS, this target BS can be realized Tandem Gateway function.
In the present embodiment, source base station can provide target BS as the needed information of MRN Tandem Gateway to target BS, is convenient to target BS and carries out gateway change.Described source base station can be realized Tandem Gateway function: source base station can be realized PGW function or SGW function or other gateway function of MRN or realize above-mentioned multiple gateway function simultaneously.The gateway information of MRN is: for MRN provides gateway function needed information.During Tandem Gateway function that source base station has comprised MRN, it is included as MRN provides gateway function needed information, if MRN will be switched to target BS or MRN from source base station and be switched to target BS or MRN is switched to target BS from source base station from source base station, source base station can be by all gateway function information that comprise in the gateway information of MRN or source base station (as the PGW function of MRN so, or SGW function, or other gateway function, or realize the relevant information of above-mentioned multiple gateway function simultaneously) offer target BS, make target BS can carry out the change of Tandem Gateway.Described target BS will carry out the change of Tandem Gateway, for MRN provides gateway function, particularly, after being the gateway information providing at source base station, carry out gateway address change, the transferring to by described target BS of all gateway functions soon comprising in the gateway function of the MRN in source base station or source base station carried out.After switching, the Tandem Gateway entity of MRN has been altered to target BS place by source base station, therefore the path between MRN Tandem Gateway and source base station has become the path between MRN Tandem Gateway and target BS in logic, the gateway communication destination node address of this MRN (being target BS address or destination communication node address or target BS identifier) is no longer source base station, and becomes target BS.Therefore need to carry out the change of this address.Certainly another mode of carrying out this change is exactly that gateway information at source base station and target BS has just directly been preserved the destination communication node address of this gateway entity when mutual, after MRN has switched, carry out the change of gateway function entity and the change of this gateway entity communication target address.Also having a kind of mode is exactly directly to give tacit consent to the change of this address, and after relay swicthing completes, the object communication node address of gateway function is exactly address or the indications of this target BS, or the address that provides of this target BS or indications etc.Described Tandem Gateway entity is a real physical entity not, but be integrated in base station, as a part for base station functions, thus target BS carry out Tandem Gateway change namely this target BS carry out this Tandem Gateway function, starting provides gateway function for this relaying.
In a kind of concrete application, in base station, combine the part or all of function of SGW and the PGW of MRN, source base station offers the MRN gateway information of target BS and can be: for MRN provides SGW and the needed information of PGW function; In base station, only combine the part or all of function of the PGW of MRN, source base station offer the MRN gateway information of target BS can be only: for MRN provides PGW function needed information.In base station, combine PGW function or SGW function or other gateway function (for example HeNB GW function) of MRN or realize above-mentioned multiple gateway function simultaneously, source base station offer target BS MRN PGW function or SGW function or other gateway function or realize the needed information of above-mentioned multiple gateway function simultaneously; In base station, combine PGW function or SGW function or other gateway function (for example HeNB GW function) of MRN or realize above-mentioned multiple gateway function simultaneously, source base station offers PGW function or SGW function or other gateway function of the MRN of target BS, or realizes the needed information of above-mentioned at least two kinds of gateway functions simultaneously;
In a kind of concrete application, source base station provides the gateway information of MRN to be to target BS: when source base station sends handover request message to target BS, carry the gateway information of MRN in handover request message.In the concrete application of another kind, source base station can provide the gateway information of MRN when sending handover request message, but the gateway information of MRN is provided after switching completes, for example, the gateway information of MRN is provided according to the gateway change request of target BS.No matter adopt which kind of mode, the object of the present embodiment is the gateway information of MRN to offer target BS, and as for the concrete gateway information transfer mode adopting, the present embodiment does not limit.
The gateway information of the target BS MRN that reception sources base station provides when can be flexibly, target BS can obtain the gateway information of MRN when receiving handover request message, also can after switching completes, obtain the gateway information of MRN, target BS can initiatively be asked for the gateway information of MRN by sending various message to source base station.For asking for the related news of the gateway information of MRN, can include but not limited to gateway change request (RN_GW_HO_REQ) message etc.
The schematic diagram of a kind of switching handling method that Fig. 3 provides for the embodiment of the present invention three, described method comprises:
S31: when mobile node is switched to after target BS, the gateway of described mobile node is altered to described target BS;
S32: target BS provides gateway function for described mobile node.
In the present embodiment, mobile node comprises UE and MRN.After UE and MRN switch, the gateway function of UE and MRN all can be transferred in the gateway function entity (being target BS itself) of target BS, is conducive to switch communicating by letter of rear mobile node and target BS.
Further, the method also can comprise: for described mobile node distributes an IP address, and described IP address is offered to described mobile node.
The method also can comprise: the gateway information of the described mobile node that reception sources base station provides;
Target BS comprises for described mobile node provides gateway function: the gateway information that target BS utilizes described mobile node provides gateway function for described mobile node.
The method also can comprise: notify the mobile management entity of described mobile node that the gateway path of described mobile management entity is switched to target BS.
The described gateway by mobile node is altered to described target BS and comprises: the part gateway function of described mobile node is transferred to described target BS.
Gateway can comprise many types, and as PGW, SGW, PGW and home eNB GW etc., some gateways may comprise above-mentioned multiple gateway function simultaneously, and this method can only be transferred to target BS by the part gateway function in gateway.
In the aforementioned embodiment, target BS is carried out Tandem Gateway change, while providing gateway function for relaying, except notifying relaying MME and relaying SGW to carry out path switching, also can will for MRN, distribute an IP address.The schematic diagram of the IP address assignment method of a kind of MRN that Fig. 4 provides for the embodiment of the present invention four, the method comprises:
S41: the gateway that in commission continues change, while providing gateway function for relaying, for described mobile relay node distributes an IP address, and offers described mobile relay node by described IP address.
Tandem Gateway entity function in source base station entity is transferred in the Tandem Gateway entity of target BS, realized Tandem Gateway change, Tandem Gateway entity in target BS (or directly saying target BS) can distribute an IP address for MRN thus, and base station sends IP address change message to MRN particularly.In this message, comprise the IP address of distributing for MRN, in this message, also comprised the TEID distributing for MRN.
S42:MRN receives the IP address of distribution, carries out IP address change.
Alternatively, MRN replys IP address change and replys message, confirms its IP address change.
The present embodiment can be realized the IP address assignment of MRN after MRN switches, it is the change that target BS carries out Tandem Gateway, for after relaying provides gateway function, in target BS, Tandem Gateway functional entity (also can think to be exactly target BS) can distribute an IP address to MRN.Certainly, the IP address that target BS distributes can be identical or different with MRN source IP address.
When base station can be in conjunction with the SGW of MRN and all or part of function of PGW,
According to the difference of gateway function, base station can be divided into several types, can be specifically:
A) base station comprises the some or all of function of relaying PGW;
B) the some or all of function that base station comprises relaying PGW and two kinds of gateways of relaying SGW;
C) the some or all of function that base station comprises relaying PGW and two kinds of gateways of home eNB GW; Now SGW can be outside base station entity.
D) the some or all of function that base station comprises relaying PGW and two kinds of gateways of home eNB GW; Now SGW does not exist in this network architecture.
E) base station comprises relaying PGW, the some or all of function of relaying SGW and tri-kinds of gateways of home eNB GW;
F) the some or all of function that base station comprises relaying PGW and other gateways;
Embodiment five is applicable to comprise in base station SGW function, or SGW function can not be present in the situation in this relaying framework.
The embodiment of the present invention five provides a kind of method of hand-off process, to realize the change of Tandem Gateway.The schematic diagram of a kind of switching handling method that Fig. 5 provides for the embodiment of the present invention five, the method comprises:
The source base station of S51:MRN sends handover request message to target BS, and described handover request message comprises the gateway information of MRN.
Source base station is by being used X2 message signaling to send handover request message to target BS, in this handover request message, except comprising MRN, switch the information that possess, the gateway information that also comprises MRN, the gateway information of described MRN is the same with description before, for: during source base station the is integrated gateway function of MRN, carry out the needed information of gateway function.Further, destination address or the identifier (being address or the identifier of target BS) of the gateway function entity of this MRN after also can comprising MRN in described handover request message and switching, so that Tandem Gateway is to communicate by letter rather than source base station with target BS.Further,
A) in described message, also can comprise: the contextual information of MRN subordinate terminal, so that target BS can set up in the process of carrying at MRN, utilizes the contextual information of described terminal to carry out remapping of terminal carrying between target BS and MRN.Certain described content can be used the message of other one to bring target BS.
B) in described message, also can comprise: session context is sent out, in session context, may comprise some policy informations, bearing binding configuration information, charge information, and operation layer entity address message.These information, for example can be used as one and make the message of session redirection (Session Redirection) carry to target side base station.
Certain described A) B) content can be used the message of other one to bring target BS.
S52: target BS is replied switching request acknowledgement message to source base station.
Be appreciated that described switching request acknowledgement message realizes by X2 message signaling equally, show that target BS agrees to switch.
S53: source base station notice MRN switches.
After S54:MRN has switched, the switching of notification target base station completes.
Receive after the switching command of source base station, MRN just carries out with the synchronizing process of target BS and is linked into Target cell.
S55a: switched and be successfully linked into after target BS at MRN, the gateway information of the MRN that target BS utilization receives carries out gateway change (relocation),, for relaying provides gateway function.Particularly, the gateway destination address of MRN can be changed to address or the identifier of described target BS self, therefore the gateway data from MRN will flow to target BS, rather than source base station.
In this step, can say that the Tandem Gateway entity function in source base station entity transfers in the Tandem Gateway entity of target BS, realized Tandem Gateway change, the Tandem Gateway entity in target BS (or directly saying target BS) can distribute an IP address for MRN thus.
S55b: the Tandem Gateway functional entity in target BS is that MRN distributes an IP address.Due to Tandem Gateway after changing, the new gateway of MRN can distribute a new IP address to MRN.Particularly, the gateway entity in target BS (target BS in other words) can send to MRN by a concrete message (as gateway address change message) by target BS by the IP address of distributing for MRN.In this message, having comprised this Tandem Gateway is the IP address that MRN distributes; In this message, also can be included as the TEID that MRN distributes.Be appreciated that the Tandem Gateway functional entity in target BS can distribute an identical IP address to MRN, or it is constant also can to maintain the existing IP of MRN address.
MRN receives IP address change message, carries out IP address change.Alternatively, MRN replys relaying IP address change and replys message, confirms its IP address change.Make thus the gateway entity (Function) in MRN and target BS set up GTP tunnel, MRN can be remapped to the carrying of its subordinate terminal in this GTP tunnel by this GTP tunnel.Certainly, the gateway entity is not here an independently entity, but within being integrated in base station, is a part for base station functions, and using it as entity, being described is here only for the ease of understanding.Alternatively, step S55b also can carry out after S57 completes.
S56: target BS notice relaying MME carries out the change of relay route (Path), and target BS can utilize existing S1-AP:Path switch request message, change and the path change of its Tandem Gateway of notice relaying MME.By this message informing MME this relaying changing cells and change Tandem Gateway.Soon the path change between relaying MME and source base station is that the path change between path, relaying MME and the trunk source GW between relaying MME and target BS is the path between relaying MME and the new GW of relaying (be integrated in the gateway function entity in target BS, actual is exactly target BS).Two kinds of above-mentioned path changes be exactly in fact the path change between relaying MME and base station, in this as the change of two paths, be described, understand just to being convenient to.
Except content of the prior art (as comprised the ECGI information of Target cell and unacceptable EPS carrying etc. in this message),
In this message, can comprise that Tandem Gateway is the relaying identifier (identity) that RN distributes/upgrades, can be relaying IP address particularly, can also comprise in addition the relaying TEID to relay distribution.
IP address and/or the TEID that in this message, can also comprise base station, described TEID can be one or more.In this message, can comprise Tandem Gateway address and/or be Tandem Gateway identifier (RN GWidentity).Concrete a kind of of this relaying identifier represents that mode is exactly the IP address of Tandem Gateway.The TEID that can also comprise Tandem Gateway.Particularly, in this message, can comprise:
Mode 1) the chain of command TEID of the control plane address of gateway (or gateway ip address) and/or gateway;
Mode 2) TEID of user's face address (or gateway ip address) of gateway and/or user's face of gateway.
The TEID of user's face address (or gateway ip address) of mode 3) the chain of command TEID of the control plane address of gateway (or gateway ip address) and/or gateway, and gateway and/or user's face of gateway.
In this message, can also comprise terminal positional information, be embodied in User Location InformationIE information; In this message, can also comprise GRE keys (for PMIP-based S5/S8); In this message, can also comprise bearer context information bearer context (s);
S57: relaying MME is after changing relay route, and transmit path is changed return information.Particularly, because target BS is after MRN switches, the relevant informations such as the gateway of MRN is also altered in target BS thereupon, renewable its relaying gateway address of relaying MME (or be included in the address of gateway functional entity in target BS, can also there be the information such as relevant TEID; Or be exactly in fact the address of target BS, can also have the information such as corresponding TEID), and the information such as the address of relay services base station and/or TEID, carry out the renewal of relaying ownership.In S56 and S57, the user that can also carry out coordinates user plane and control plane between relaying MME and GW is carried coordination.
This process implementation by the path change between relaying MME and source base station, be the path between relaying MME and target BS, and the path change between relaying MME and trunk source GW is the path between the new GW of relaying MME-relaying (be integrated in the gateway function entity in target BS, actual is exactly target BS).
In one implementation, relaying MME is after receiving the gateway information of MRN, can send S1-AP:r-Path switch request ack message to target BS, i.e. a handover request response message, this message is confirmed this relay route change request message for relaying MME.
In said process S56 and S57, between target BS and relaying MME, by 2 signalings, realize path change notice and confirmation to each other.In another kind of implementation, target BS notice relaying MME carries out relay route change can be realized according to old process.Target BS can be to relaying MME transmit path handover request (Path switch request) message, by relaying MME, to target BS, return to User PlaneUpdate Request message, target BS sends User Plane Update Response message to relaying MME, by relaying MME, carry out relay route change, then to target BS return path handoff response (Pathswitch request ack) message.For idiographic flow how to notify relaying MME change relay route, the present embodiment does not limit.
S58: the path change flow process of carrying out terminal between target BS and terminal MME and terminating gateway.
Concrete end path change flow can be used existing techniques in realizing, also can adopt the method (as embodiment 16) described in subsequent embodiment.
S59: source base station discharges the related resource of MRN.Target BS is after completing the switching of gateway change and user plane and control plane, and source base station can discharge the related resource of MRN, and described related resource can also comprise the gateway information of MRN.Source base station also can discharge the related resource of MRN subordinate terminal simultaneously.
The present embodiment is by when MRN switches, MRN is realized to gateway change, target BS provides gateway function for relaying, and notify relaying MME to carry out relay route change, making the path change between relaying MME and source base station is the path between relaying MME and target BS, and the path change between relaying MME and trunk source GW is the path between the new GW of relaying MME-relaying (be integrated in the gateway function entity in target BS, actual is exactly target BS).
In actual applications, between the different step of above-mentioned each embodiment of the method, order can be changed, and this adjustment will not affect enforcement of the present invention.For example, between S55 and S56, S57, order can be adjusted, and target BS carries out gateway change, and the process sequencing that relaying IP address assignment and target BS notice relaying MME carry out relay route change can change.
The schematic diagram of a kind of switching handling method that Fig. 6 provides for the embodiment of the present invention six, the overall procedure of the method and embodiment five are similar, and implementation process is slightly different, comprising:
The source base station of S61:MRN sends handover request message to the relaying MME of MRN, and described handover request message comprises the gateway information of MRN.
Different from embodiment five, in the present embodiment, source base station is not by being used X2 message signaling, but by using S1 message signaling to send handover request message to relaying MME, so that relaying MME forwards this message to target BS, this is identical with the effect that embodiment five plays.
S62: described relaying MME forwards described handover request message to target BS.
S63: target BS is replied switching request acknowledgement message to relaying MME.
Be appreciated that switching request acknowledgement message is realized by S1 message signaling equally.
S64: described relaying MME forwards switching request acknowledgement message to source base station.
Process S65 to S611 is subsequently identical with process S53 to S59 in embodiment five, repeats no more herein, and the present embodiment can be changed by realizing route equally, when only source base station sends handover request message to target BS, need to pass through the forwarding of relaying MME.Be appreciated that MRN and terminal are similar, can utilize RRC (Radio Resource Control, Radio Resource is controlled) message to realize the transmission of handover request message, the present embodiment is as limiting.
In above-described embodiment five and embodiment six collection of base stations the whole and partial function of Tandem Gateway, be appreciated that, in base station, also can only gather the PGW function of Tandem Gateway and not comprise SGW function, can there is change slightly in the specific implementation flow process of hand-off process therefore now
The schematic diagram of a kind of switching handling method that Fig. 7 provides for the embodiment of the present invention seven, described method comprises:
S71 to S74 is identical with the process S51 to S54 in embodiment five, repeats no more herein.
S75a: be successfully linked into after target BS at MRN, the gateway information of the MRN that target BS utilization receives carries out gateway change (relocation), particularly, the gateway destination address of MRN is changed to described target BS self address or identifier, therefore from MRN gateway data, will flow to target BS, rather than source base station.
In this step, owing to having merged Tandem Gateway function in base station, target BS can be given tacit consent to its gateway is changed to described target BS self after MRN is switched to, at Tandem Gateway functional entity, from source base station, be successfully altered to target BS place thus, so that target BS is carried out Tandem Gateway function.
Tandem Gateway entity function in source base station entity is transferred in the Tandem Gateway entity of target BS, has realized Tandem Gateway change, and the Tandem Gateway entity in target BS (or directly saying target BS) can distribute an IP address for MRN thus.
S75b: due to Tandem Gateway after changing, the gateway that relaying is new can distribute a new IP address to MRN.Gateway entity in base station can send to MRN by target BS by the IP address of distributing for RN particularly, or distributes an identical IP address to MRN, or it is constant also can to maintain the existing IP of MRN address.
Make thus the gateway entity (Function) in MRN and target BS set up GTP tunnel, MRN can be remapped to the carrying that plays subordinate terminal in this GTP tunnel by this GTP tunnel.Certainly, the gateway entity is not here an independently entity, but within being integrated in base station, is a part for base station functions, and using it as entity, being described is here only for the ease of understanding.
Alternatively, step S75b also can carry out after S79 completes.
S76: target BS notice relaying MME carries out the change of relay route (Path), target BS, by the gateway information notice relaying MME of MRN, makes relaying MME change relay route.Particularly, target BS sends Path switch request (path change request) message to relaying MME, and notice MME this relaying is changing cells, has comprised the ECGI information of Target cell and unacceptable EPS carrying etc. in message.
Target BS can utilize to the relaying MME of MRN existing S1-AP:Path switch request message, realizes change and the path change of its Tandem Gateway of notice relaying MME.
In this message, also having comprised Tandem Gateway is that RN distributes/upgrade relaying identifier (identity), can be relaying IP address particularly.Can also comprise in addition the relaying TEID to relay distribution.IP address and/or the TEID that in this message, can also comprise base station.
Particularly, in this path request message, comprised Tandem Gateway address and/or be Tandem Gateway identifier (RN GW identity).Concrete a kind of of this relaying identifier represents that mode is exactly the IP address of Tandem Gateway.In this path request message, can also comprise the TEID of Tandem Gateway.Particularly, in this path request message, can comprise:
Mode 1) the chain of command TEID of the control plane address of gateway (or gateway ip address) and/or gateway;
Mode 2) TEID of user's face address (or gateway ip address) of gateway and/or user's face of gateway.
The TEID of user's face address (or gateway ip address) of mode 3) the chain of command TEID of the control plane address of gateway (or gateway ip address) and/or gateway, and gateway and/or user's face of gateway.
S77: relaying MME sends user's face update request (user plane update request) message to relaying SGW.Particularly, in this message, also having comprised Tandem Gateway is that RN distributes/upgrade relaying identifier (identity), can be relaying IP address particularly, can also comprise in addition the relaying TEID to relay distribution.IP address and/or the TEID that in this message, can also comprise base station.
In this message, also can comprise Tandem Gateway address and/or be Tandem Gateway identifier (RN GWidentity).Concrete a kind of of this relaying identifier represents that mode is exactly the IP address of Tandem Gateway.In this message, can also comprise the TEID of Tandem Gateway.Particularly, in this message, can comprise:
Mode 1) the chain of command TEID of the control plane address of PGW gateway (or gateway ip address) and/or gateway;
The TEID of user's face address (or gateway ip address) of mode 2) the chain of command TEID of the control plane address of PGW gateway (or gateway ip address) and/or gateway, and gateway and/or user's face of gateway.
In this message, can also comprise terminal positional information, be embodied in User Location InformationIE information;
In this message, can also comprise GRE keys (for PMIP-based S5/S8);
In this message, can also comprise bearer context information bearer context (s);
In this message, all right the Protocol Type over S5/S8, is used to indicate SGW and adopts which kind of protocol communication at S5/S8 interface.
Thereby the path change of realizing between relaying SGW and source base station is the path between relaying SGW and target BS, and the path change between relaying SGW and trunk source PGW is the path between the new PGW of relaying MME-relaying (be integrated in the gateway function entity in target BS, actual is exactly target BS).
S78: relaying SGW carries out path change, and relaying PGW address is changed to the gateway function entity (being exactly in fact target BS) in described target BS, and send user's face renewal reply (user planeupdate request) message to relaying MME, the path change of notice relaying MME relaying SGW completes, and family face upgrades to reply in message and comprised:
Mode 1) the chain of command TEID of the control plane address of SGW gateway (or gateway ip address) and/or gateway;
The TEID of user's face address (or gateway ip address) of mode 2) the chain of command TEID of the control plane address of SGW gateway (or gateway ip address) and/or gateway, and gateway and/or user's face of gateway;
Mode 3) TEID of user's face address (or gateway ip address) of SGW gateway and/or user's face of gateway.
S79: after the path change of relaying MME in receiving S76 notice, upgrade thus the relevant informations such as target BS address, upgraded the information such as address that PGW is relevant and/or TEID, carry out the renewal of relaying ownership.After upgrading, relaying MME transmit path change acknowledge message (path switch ACK) message, to target BS, can comprise following message in this message:
Mode 1) the chain of command TEID of the control plane address of SGW gateway (or gateway ip address) and/or gateway;
The TEID of user's face address (or gateway ip address) of mode 2) the chain of command TEID of the control plane address of SGW gateway (or gateway ip address) and/or gateway, and gateway and/or user's face of gateway;
Mode 3) TEID of user's face address (or gateway ip address) of SGW gateway and/or user's face of gateway.
Step S76, S77, S78 and S79 can carry out with step S75a (or step S75a and S75b) simultaneously, also can be after S74, before S75a, carry out.Step S76 in a word, S77, S78 and S79 can be simultaneously with step S75a (or step S75a and S75b), or successively carry out.
Subsequent process S710 to S711 is identical with the process S58 to S59 in embodiment five, repeats no more here.The present embodiment pair set the base station of relaying PGW function carry out gateway address change, and the path of SGW and relaying MME is changed, thereby is completed gateway change, avoid target BS that MRN data are returned to source base station.
Source base station in above-described embodiment seven is by being used X2 message signaling to send handover request message to target BS, but be appreciated that, source base station also can adopt mode in embodiment six, by using S1 message signaling to send handover request message to relaying MME, make relaying MME that handover request message is transmitted to target BS, realize the transmission of handover request; The reply of Handover Request Acknowledge and handover request message transmitting process are similar, and can't help source base station and target BS and directly send and forward by relaying MME.
Be appreciated that source base station provides the implementation method of the gateway information of MRN to target BS can not be unique.In previous embodiment, source base station is carried at the gateway information of MRN in handover request message and sends to target BS, makes target BS can obtain the gateway information of MRN in handover request process, for follow-up MRN has switched rear gateway, changes ready.In another kind of implementation, source base station can not be carried at the gateway information of MRN in handover request message and send to target BS, but target BS carries out gateway change request to source base station after MRN has switched, request provides described gateway information to direction self.
The schematic diagram of a kind of switching handling method that Fig. 8 provides for the embodiment of the present invention eight, the method comprises:
S81 and S82 are with process S53 and S54.
S83: synchronize with target BS as MRN, be successfully linked into behind Target cell, target BS sends gateway change request message to the source base station of MRN.This gateway change request message can be realized by the X2 message signaling between base station, can comprise the identifier of address and identifier or the Target cell of described target BS.Be appreciated that this gateway change request message can be substituted by the similar message of other function, as a handoff notification message.
S84: source base station is received after gateway change request message, sends gateway change and replys message to described target BS, and the gateway information that message comprises MRN is replied in this gateway change.Gateway change is replied message and can by X2 message signaling, be realized equally.Further, address or the identifier (being address or the identifier of target BS) that also can comprise the rear intended gateway of MRN switching in message replied in described gateway change.
Further, A) in described message, also can comprise: the contextual information of MRN subordinate terminal, so that target BS can set up in the process of carrying at MRN, utilizes the contextual information of described terminal to carry out remapping of terminal carrying between target BS and MRN.Certain described content can be used the message of other one to bring target BS.
B) in described message, also can comprise: session context is sent out, in session context, may comprise some policy informations, bearing binding configuration information, charge information, and operation layer entity address message.These information, for example can be used as one and make the message of session redirection (Session Redirection) carry to target side base station.
Certain described A) B) content can be used the message of other one to bring target BS.
Process S85a to S89 is identical with S59 with embodiment five S55a.Target BS can send gateway change request message to source base station in the present embodiment, makes source base station that the gateway information of MRN is provided to target BS, so that target BS is realized the change of gateway.
S86, S87 can carry out with S85a simultaneously, also can be prior to before S85a, after S84, carry out.S86 in a word, S87 can carry out with S85a simultaneously, also can successively carry out.
S86, S87 also can with S85a, S85b carries out simultaneously, also can be prior to before S85a, carry out after S84.S86 in a word, S87 can with S85a,, S85b can carry out simultaneously, also can successively carry out.
Be appreciated that the process S84 that target BS is replied message to process S83 and the change of reception gateway of the source base station transmission gateway change request message of MRN can not pass through to use X2 message signaling, but realize by use S1 message signaling.When gateway change request message realizes by use S1 message signaling with reception gateway change reply message, be that information transmission between target BS and source base station will be passed through the forwarding information of relaying MME, existing description during this repeating process handover request message in embodiment six sends, does not do concrete expansion herein.The present embodiment eight and embodiment sample on May Day, merged the whole and partial function of PGW and SGW in Tandem Gateway in its base station.While only having merged in Tandem Gateway PGW function in base station, process S85 to S89 can change a lot, and can adopt the gateway variation similar with embodiment seven, adopt with embodiment seven in the similar process of S73 to S711.
Be appreciated that, for example, between the process (S85a and the S86 in embodiment eight) that target BS carries out the process that gateway is changed and notifies relaying MME to carry out relay route change, do not have sequencing, wherein arbitrary process can be before another process, and 2 processes also can realize simultaneously.Be appreciated that; between the different step of the various embodiments described above, do not have strict order; those skilled in the art can need to carry out certain adjustment to embodiment according to reality; the change of each step execution sequence will not affect the embodiment of the present invention and implement; the beneficial effect of its generation is also that those skilled in the art can expect, within being therefore also included within protection range of the present invention.And the implementation between above-mentioned each embodiment of the method can interosculate to form new specific implementation, and reach the desired effect obtaining of those skilled in the art.
The schematic diagram of a kind of switching handling method that Fig. 9 provides for the embodiment of the present invention nine, the method comprises:
S91 to S94 is identical with the process S51 to S54 in embodiment five, repeats no more herein.
S95: be successfully linked into after target BS at MRN, the gateway information of the MRN that target BS utilization receives carries out gateway change (relocation), particularly, the gateway destination address of MRN is changed to described target BS self address or identifier, therefore from MRN gateway data, will flow to target BS, rather than source base station.
S96: due to Tandem Gateway after changing, the gateway that relaying is new can be given new IP address of relay distribution.Gateway entity in base station can send to relaying by target BS by the IP address of distributing for RN particularly, or gives identical IP address of relay distribution, or it is constant also can to maintain the existing IP of relaying address.
S97: target BS transmit path change request (GW_path switch REQ) message informing relay services gateway (SGW), this MRN is changing cells, and relaying PGW also changes simultaneously.To impel relay services gateway to carry out path change different from relaying MME in embodiment seven, in the present embodiment by target BS transmit path change request to impel relay services gateway to carry out path change.
S98: after relaying SGW is notified, upgrade thus its Tandem Gateway destination address (being exactly in fact the address of target BS), and the information such as the relevant address of MRN, Tandem Gateway and/or TEID, carry out the renewal of relaying ownership, upgrade complete after, can send gateway path change reply (GW pathswitch RSP) message and send out to target BS, to promote the path change of network gateway.Relaying SGW communicates by address and the Tandem Gateway of target BS, and the user that can carry out coordinates user plane and control plane in S97 and S98 between MME and GW is carried coordination.In prior art, the relevant information between MME and gateway and identifier also will keep the constant of former protocols having simultaneously.
S99: target BS utilizes existing path switch request message informing relaying MME, and this relaying is changing cells, relaying PGW also changes simultaneously.Target BS notice relaying MME carries out the change of relay route (Path), and target BS, by the gateway information notice relaying MME of MRN, makes relaying MME change relay route.Relaying MME to relaying path change after, the data that make SGW send MRN to send to target BS but not source base station.
S910: relaying MME can carry out the path switching of Tandem Gateway, and the gateway path that is about to MRN is switched to target BS, and transmit path switching response message is to target BS.
Subsequent process S911 to S912 is identical with the process S58 to S59 in embodiment five, repeats no more here.The present embodiment pair set the base station of relaying PGW function carry out gateway address change, and the path of SGW and relaying MME is switched, thereby completes gateway change.Be appreciated that, between S97, S98 and S99, S910, there is no strict sequencing, target BS can be first to relay services gateway transmit path change request message, then to relaying MME transmit path handover request message, or 2 processes can be carried out simultaneously, and the present embodiment does not limit this.
The schematic diagram of a kind of switching handling method that Figure 10 provides for the embodiment of the present invention ten, the method comprises:
S101 to S104 is with step S81 to S84 in embodiment eight.
S105 is with S86 in embodiment eight.
S106 to S107 is with S97 to S98 in embodiment seven.
S108a and S108b are with embodiment eight S85a and S85b.
S109 to S1011 is with embodiment eight S87 to S89.
The schematic diagram of a kind of switching handling method that Figure 11 provides for the embodiment of the present invention 11, the method comprises:
S111 and S112 with step with step S81 and S82 in embodiment eight.
S113: target BS sends gateway change request message to source base station.
S114: source base station sends gateway change to target BS and replys message, and the gateway information that comprises MRN in message is replied in gateway change.
S115: target BS first sends relay route notice of change to relaying MME.
S116a: target BS carries out the change of gateway address.Before concrete gateway address change, the change process of embodiment is similar.
S116b: target BS is that MRN distributes an IP address.
S117: complete after relay route change at relaying MME, transmit path change return information is to target BS.
In process S118 and S119 and embodiment eight, S88 and S89 are similar, no longer launch herein.
The present embodiment shows, the process that target BS execution Tandem Gateway address is upgraded and notice relaying MME change relay route, and the sequencing when relaying MME changes between relay route can carry out accommodation.
The schematic diagram of a kind of switching handling method that Figure 12 provides for the embodiment of the present invention 12, the method comprises:
S121:MRN receives IP address change message, carries out IP address change;
S122: base station and MRN carry out GTP tunnel foundation and/or new technological process more, and carry and set up and/or upgrade, and the EPS carrying of terminal is remapped to the radio bearer after renewal.
The present embodiment base station and MRN can realize radio bearer and upgrade after switching.
When MRN switches, core net corresponding to MRN subordinate terminal and this terminal do not recognized this switching, therefore core-network side need to be carried out the switching of end path, to be that terminal MME is to the path of target BS by original terminal MME to the path change of source base station.
The schematic diagram of a kind of end path change method that Figure 13 a provides for the embodiment of the present invention 13, the method comprises:
S131a: to terminal MME transmit path handover request (path switch request) message, described path handover request message comprises the information of at least 2 terminals, described at least 2 terminals belong to described terminal MME, and described path handover request message is switched to target BS for requesting terminal MME by end path.That is to say, described path handover request message is for the changing cells of at least 2 terminals described in notification terminal MME, need to carry out the change (user's face of terminating gateway connects need to be switched to target BS from source base station) of the destination node of descending GTP tunnel, be that between terminating gateway and source base station, route diversion is the path between terminating gateway and target BS, between terminal MME and source base station, route diversion is the path between terminal MME and target BS.
S132a: the path switching response message that receiving terminal MME sends.
After switch in terminal MME path, can transmit path handoff response make target BS can receive described response.Described response can comprise path handover success and unsuccessful 2 kinds of situations, does not launch herein.
In fact, each terminal has the terminal MME functional entity of oneself and the terminating gateway (PGW/SGW) of oneself.The MME functional entity of a plurality of terminals can be in a stand-alone terminal MME physical entity, can be not yet on an actual physics entity independently.In like manner, for the gateway function entity of a plurality of terminals of terminating gateway, can be in a stand-alone terminal gateway physical entity, can be not yet on an actual physics entity independently.
Terminal MME physical entity comprises a plurality of terminals (N receiving, N is more than or equal to 2) after the path handover request of information, terminal MME can send one to each terminating gateway and revise bearing request message, send to each to revise bearing request message and comprise the information that belongs to the terminal of this terminating gateway in described a plurality of terminal, make each terminating gateway according to these information, the terminal of its subordinate in a plurality of terminals is carried out to end path change.If in a plurality of terminals (N), (K, part terminal, K is less than or equal to N, and be more than or equal to 2) gateway be in the physical entity of a terminating gateway, terminal MME can cross a modification bearing request message by this part terminal (K) information exchange and send to this terminating gateway physical entity so, rather than the corresponding modify bearing request message of single each terminal of transmission.
When (M, a plurality of terminals of MRN service, M is more than or equal to 2) do not belong to same terminal MME physical entity, and be only part terminal MME (N wherein, N is more than or equal to 2, and N is less than or equal to M) in same terminal MME physical entity, that is to say the situation of a plurality of terminal MME in different terminal MME physical entities that exist, a plurality of terminals that belong to same terminal MME physical entity can be used as one group, target BS can send a paths handover request message to the terminal MME physical entity of this group terminal, being convenient to this terminal MME physical entity changes the path of this group terminal.Therefore, target BS can send mulitpath handover request message for described a plurality of terminal MME physical entities, but such implementation procedure does not still need target BS for the independent transmit path handover request of each terminal message, still can save the expense of signaling.
The schematic diagram of a kind of end path change method that Figure 13 b provides for the embodiment of the present invention 13, the method comprises:
S131b: RX path handover request message, described path handover request message comprises the information of at least 2 terminals, and described at least 2 terminals belong to this terminal MME, and described path handover request message is switched to target BS for request by end path.Simply, described path handover request message is for the changing cells of at least 2 terminals described in notification terminal MME, and terminal MME also needs notification terminal gateway to carry out the change (user's face of terminating gateway connects need to be switched to target BS from source base station) of the destination node of descending GTP tunnel.
S132b: transmit path switching response message.Terminal MME receives the path handover request message that base station sends, and path is switched to target BS, and transmit path switching response message is given described base station.
Further, described method can comprise: terminal MME sends and revises bearing request message to the terminating gateway of described at least 2 terminals, the information of at least 2 terminals described in comprising in this modification bearing request message, connects user's face to be switched to target BS (being that terminating gateway changes to target BS by the destination node of described at least 2 descending GTP tunnels of terminal) with notification terminal gateway; Receive the modification bearing response message that described terminating gateway sends.This implementation process can initiate to revise bearing request message to the terminating gateway of at least 2 terminals by terminal MME, the gateway energy realizing route of a plurality of terminals is switched, and making the route diversion between terminating gateway and source base station is the path between terminating gateway and target BS.
Though described in being appreciated that, at least 2 terminals belong to same terminal MME, may belong to different terminals gateway.When described at least 2 terminals all belong to a terminating gateway, terminal MME can only send one to this terminating gateway and revise bearing request message, and requesting terminal gateway carries out the change in path to described at least 2 terminals.When described at least 2 terminals do not belong to a terminating gateway, there is the situation of the corresponding a plurality of terminating gateways of a plurality of terminals, terminal MME can be defined as a set of terminal by least 2 terminals that belong to same terminating gateway in described at least 2 terminals, terminating gateway to this group terminal sends a modification bearing request message, and terminal MME can send a plurality of modification bearing request message for a plurality of terminating gateways.Nonetheless, article one, revising bearing request message still can be used for notification terminal gateway the destination node of described at least 2 descending GTP tunnels of terminal is changed to target BS, without this, each terminal is sent separately to modification bearing request message, can save the expense of signaling.The modification bearing response message that is appreciated that the terminating gateway that terminal MME receives can represent that modification is carried successfully or failure, no longer launches herein.
The schematic diagram of a kind of end path change method that Figure 14 provides for the embodiment of the present invention 14, the method comprises:
S141: gateway receives revises bearing request message, described modification bearing request message comprises the information of at least 2 terminals, described at least 2 terminals belong to described gateway, and described modification bearing request message connects user's face to be switched to target BS (being that terminating gateway changes to target BS by the destination node of described at least 2 descending GTP tunnels of terminal) for notice;
S142: gateway connects user's face to be switched to target BS;
S143: gateway is replied one and revised bearing response message.
The gateway of the present embodiment receives a piece of news, is modified at least 2 its subordinate terminal paths, saves signaling consumption, has improved efficiency.Gateway connects user's face to be switched to after target BS, the transmission path process target BS of gateway and described at least 2 terminals, rather than pass through source base station as before switching, can guarantee the base station that gateway data flow is correct like this.
The schematic diagram of a kind of end path change method that Figure 15 provides for the embodiment of the present invention 15, the method comprises:
S151: target BS is to terminal MME transmit path handover request message, and notifying described MME is that the base station that UE serves changes, and described path handover request message comprises the information of a plurality of terminals, and described a plurality of terminals belong to described terminal MME.
TAI+ECGI and unaccepted EPS bearers that this message specifically can comprise Target cell carry the information such as list.
Content in prior art in a path handover request (path switch request) message is all for a terminal.For carry out the situation of path change for a plurality of terminals, if base station is each carrying (bearers) situation that can distinguish each terminal, therefore can be by the information content of the path handover request of a plurality of terminals (path switch request) message, be aggregated in a path handover request message, in order to show difference, the path handover request message that also this can be gathered is called in path handover request message 2 (path switch request-all) message.The MME functional entity of the plurality of terminal is all in a MME physical entity simultaneously, and base station just can send to this MME functional entity by this path handover request 2 (path switchrequest-all, to show difference) message so.
S152: described terminal MME receives path handover request message, and send a modification bearing request message to terminating gateway, the connection of user's face of notification service gateway need to be switched to target BS from source base station.This path handoff request message is drawn together the information of described a plurality of terminal (N, be more than or equal to 2).MME receives the path switching handover request message of relevant a plurality of terminals (N) so, and MME need to notify all terminating gateway functional entitys of described a plurality of terminal (N), the path change of relevant terminal.If (Q, a plurality of terminals of part in described a plurality of terminal (N), Q is less than or equal to N, and being more than or equal to 2) gateway function is in same gateway physical entity, so just use a modification bearing request message to issue terminating gateway physical entity, by this terminating gateway physical entity, for different terminals, processed.If do not possess the situation of terminating gateway function in same gateway physical entity, just use single terminal to send single modification bearing request message to terminating gateway separately.In addition, terminal MME can not used above-mentioned optimization, but continue to continue to use prior art, and terminal MME can send one for each terminal and revise bearing request message, and each modification bearing request message is the attaching information with the corresponding terminal of this message for the renewal of requesting terminal gateway.Revise the address that has specifically comprised the common target BS based on a plurality of terminals in bearing request message for one, and corresponding TEIDs, even comprised terminal positional information, specifically a plurality of terminal positional information IEs (User Location Information IE).
In this process, terminal MME carries out path switching, is about to its end path and is switched to target BS, makes the transmission path of terminal MME and a plurality of terminals pass through target BS but not source base station.Terminal MME after switching is when mutual with described a plurality of end messages, and its information can flow to target BS rather than the original base station of terminal.
S153: terminating gateway carries out user plane switching, its end path is switched to target BS, also the transmission path of described a plurality of terminals is changed, and makes the transmission path of terminating gateway and a plurality of terminals pass through target BS but not source base station.In this step, the new address that terminating gateway is received use and TEIDs are at the descending target BS that sends data to.In fact now the path change being about between gateway and source base station is the path between terminating gateway and target BS.
S154: after having switched, terminating gateway sends one and revises bearing response message to terminal MME, and this modification bearing response message is changed for the Tandem Gateway address of a plurality of terminals described in notification terminal MME.Be appreciated that, when terminal MME sends a modification bearing request message to terminating gateway for each terminal, what terminating gateway was received is a plurality of modification bearing request message, now terminating gateway need to be revised bearing request message for each and send a response message, for each terminal, sends 1 and revises bearing response message to terminal MME.
S155: terminal MME is to target BS transmit path switching response message, and has switched in notification target base station terminal path.Terminal MME can be carried at the information of the successful a plurality of terminals of path change in the switching response message of path and send to target BS.The concrete Pathswitch request ACK message of described path switching response message.
In the present embodiment, the gateway of terminal and MME carry out end path switching, the path change that has been about to realize between terminating gateway and source base station is the path between terminating gateway and target BS, path between terminal MME and source base station, change to the path between terminal MME and target BS, make the data of relaying subordinate terminal can pass to target BS, then pass to relaying by target BS (existing relay services base station).
In fact, each terminal has the terminal MME functional entity of oneself and the terminating gateway (PGW/SGW) of oneself.The MME functional entity of a plurality of terminals can be in a stand-alone terminal MME physical entity, can be not yet on an actual physics entity independently.Be appreciated that above-described embodiment 15 for be the situation that a plurality of terminal MME functional entitys belong to a terminal MME physical entity.
In like manner, for the gateway function entity of a plurality of terminals of terminating gateway, can be in a stand-alone terminal gateway physical entity, can be not yet on an actual physics entity independently.
Other that make for the present embodiment similarly changes and modification also can be thought protection scope of the present invention.The end path change method described in above-described embodiment 13 to embodiment 15 that is appreciated that can be applicable to the switching under various scenes, integrated or while there is no integrated Tandem Gateway function in base station, can adopt said method to carry out the change of end path.No matter in above-described embodiment be the information of a plurality of terminals that all carries in path handover request message or modification bearing request message.For ease of understanding, to this, will illustrate below.If path handover request message or revise bearing request message and comprise n end message, n terminal can use respectively UE1, UE2 ..., UEn represents, the information of n terminal be respectively s1, s2 ..., sn represents.If comprised the indications of this terminal in the path handover request message of single terminal or modification bearing request message, (for transmit leg and recipient, identify this terminal, to be different from the sign of other-end), for the path handover request message that has comprised n terminal or modification bearing request message, recipient and transmit leg will be identified the information of each terminal so.If do not comprise the indications of terminal in the path handover request message of single terminal or modification bearing request message, for ease of the receiving terminal (terminal MME or terminating gateway) of these information, go to separate the information of these terminals, can be these information and add the indications of terminal, as s1, s2 ..., the numbering of sn can be respectively 1,2 ..., n, also can be other numbering, for example MME UE S1AP ID, the eNB UE S1AP ID of terminal, or IMSI or MEIdentity etc., here as limiting.The receiving terminal of information, receiving path handover request message or revising after bearing request message, can judge whether this information is the information of its subordinate terminal according to the numbering of each information.And these terminals of its subordinate carry out path change, namely the transmission path of itself and these terminal is switched to target BS from original source base station.When like this, terminal MME or terminating gateway and its end message are mutual, corresponding information will pass through target BS rather than original base station.Be appreciated that, in the present embodiment also can using the total information of described a plurality of terminals as one independently information be carried at path handover request message or revise in bearing request message, the total information of a plurality of like this terminals just need to repeatedly not repeat to transmit in the information of each terminal.
The schematic diagram of a kind of switching handling method that Figure 16 provides for the embodiment of the present invention 16, the method comprises:
The schematic diagram of a kind of switching handling method that Figure 16 provides for the embodiment of the present invention 16, the method comprises:
S161:MRN sends measurement report to source base station.
The information of the source base station of S162:MRN based on measurement report, sends handover request message to target BS, and described handover request message comprises the gateway information of MRN, is: during source base station the is integrated gateway function of MRN, carry out the needed information of gateway function.Further, destination address or the identifier (being address or the identifier of target BS) of the gateway function entity of this MRN after also can comprising MRN in described handover request message and switching, so that Tandem Gateway is to communicate by letter rather than source base station with target BS.
Further,
A) in described message, also can comprise: the contextual information of MRN subordinate terminal, so that target BS can set up in the process of carrying at MRN, utilizes the contextual information of described terminal to carry out remapping of terminal carrying between target BS and MRN.Certain described content can be used the message of other one to bring target BS.
B) in described message, also can comprise: session context is sent out, in session context, may comprise some policy informations, bearing binding configuration information, charge information, and operation layer entity address message.These information, for example can be used as one and make the message of session redirection (Session Redirection) carry to target side base station.
Certain described A) B) content can be used the message of other one to bring target BS.
S163: target BS is replied switching request acknowledgement message to source base station.
S164: source base station notice MRN switches.
After S165:MRN has switched, the switching of notification target base station completes.
Receive after the switching command of source base station, MRN just carries out with the synchronizing process of target BS and is linked into Target cell.
S166: switched and be successfully linked into after target BS at MRN, the gateway information of the MRN that target BS utilization receives carries out gateway change (relocation), for relaying provides gateway function, particularly, the gateway destination address of MRN can be changed to address or the identifier of described target BS self, therefore the gateway data from MRN will flow to target BS, rather than source base station.
In this step, can say that the Tandem Gateway entity function in source base station entity transfers in the Tandem Gateway entity of target BS, realized Tandem Gateway change, the Tandem Gateway entity in target BS (or directly saying target BS) can distribute an IP address for MRN thus.
S167: the Tandem Gateway functional entity in target BS is that MRN distributes an IP address.Due to Tandem Gateway after changing, the new gateway of MRN can be given new IP address of relay distribution.Gateway entity in target BS (target BS in other words) can send to relaying by a concrete message (as gateway address change message) by target BS by the IP address of distributing for RN particularly.The IP address that to have comprised this Tandem Gateway in this message be relay distribution; Be appreciated that Tandem Gateway functional entity in target BS can be to identical IP address of relay distribution, or it is constant also can to maintain the existing IP of relaying address.
S168:MRN receives IP address change message, carries out IP address change.Make thus the gateway function entity (Functionality) in MRN and target BS set up GTP tunnel, MRN can be remapped to the carrying of its subordinate terminal in this GTP tunnel by this GTP tunnel.Certainly, the gateway entity is not here an independently entity, but within being integrated in base station, is a part for base station functions, and using it as entity, being described is here only for the ease of understanding.
Alternatively, also can comprise that S168 ': MRN replys relaying IP address change and replys message, confirm its IP address change.
S169: target BS notice relaying MME carries out the change of relay route (Path), target BS, by the gateway information notice relaying MME of MRN, makes relaying MME change relay route.Concrete, target BS sends Path switch request (path change) message to relaying MME, and this relaying of notice MME is changing cells, particular content in message, and the parameter comprising is as embodiment six, described in step S56.
S1610: relaying MME is after changing relay route, and transmit path is changed return information.
S1611: carry out Radio Resource between target BS and RN and reshuffle, the carrying of relaying subordinate terminal is mapped on RN radio bearer.Be appreciated that in the switching handling method of other embodiment and also can comprise that this relay wireless bearer update and terminal carrying remap process.
S1612: the path change flow process of carrying out terminal between target BS and terminal MME and terminating gateway.
S1613: source base station discharges the related resource of MRN.Target BS is after completing gateway change, and after the switching of user plane and control plane, source base station can discharge the related resource of MRN.Described related resource can also comprise the gateway information of MRN.Source base station also can discharge the relevant information of MRN subordinate terminal simultaneously.
The present embodiment is by when MRN switches, MRN is realized to gateway change, target BS provides gateway function for relaying, and notify relaying MME to carry out relay route change, making the path change between relaying MME and source base station is the path between relaying MME and target BS, and the path change between relaying MME and trunk source GW is the path between the new GW of relaying MME-relaying (be integrated in the gateway function entity in target BS, actual is exactly target BS).Be appreciated that said process execution sequence can carry out certain adjustment, as this relaying IP allocation step S167 and S168, can carry out with this path change request step S169 and S1610 simultaneously, or carry out after S169 and S1610 complete.Before in addition S1611 being placed on to S169 or S1610, carry out, this does not affect the enforcement of the present embodiment.
The schematic diagram of a kind of base station that Figure 17 provides for the embodiment of the present invention 17, Tandem Gateway function can be realized in this base station, and this base station 170 comprises:
Change module 171, for being switched to when mobile relay node behind this base station 170, is altered to this base station 170 by the gateway of described mobile relay node;
Gateway module 172, is used to mobile relay node that gateway function is provided.
The base station 170 of the present embodiment can be switched to and from after one's death, realize gateway change at MRN.This base station 170 can further comprise: distribution module, is used to described mobile relay node to distribute an IP address, and described IP address is offered to described mobile relay node.Further, this base station 170 can comprise: information receiving module, the gateway information of the mobile relay node providing for reception sources base station; The gateway information that described gateway module 172 is configured to utilize described mobile relay node provides gateway function for described mobile relay node.Further, this base station 170 also can comprise: the first notification module, and for notifying relaying mobile management entity that its gateway path is switched to described base station 170.Further, this base station 170 also can comprise: path handover module, be used for to fast mobile terminal management entity transmit path handover request message, described path handover request message comprises the information of at least 2 terminals, for requesting terminal mobile management entity, gateway path is switched to base station 170, described at least 2 terminals belong to described fast mobile terminal management entity.
Change module 171 can comprise: changing unit, and for the gateway destination address of described mobile relay node is changed to described base station 170.
Under a kind of application, relaying PGW and SGW function can be realized in this base station 170, and now changing module 171 can be configured to: the junction network gateway of described mobile relay node and relay services gateway are altered to described base station 170.
Under another kind application, relaying PGW function can be realized in this base station 170, SGW function is not integrated in this base station 170, but as a gateway independently, now changing module 171 can be configured to: the junction network gateway of described mobile relay node is altered to described base station 170; Correspondingly, this base station 170 also can comprise: the second notification unit, and for notifying the relay services gateway of described mobile relay node that the gateway path of relay services gateway is switched to described base station 170.
The schematic diagram of a kind of base station that Figure 18 provides for the embodiment of the present invention 18, this base station 180 comprises:
Gateway function module 181, is used to mobile relay node that gateway function is provided;
Information provides module 182, for the gateway information of mobile relay node is provided to target BS, to indicate described target BS Tandem Gateway to be altered to described target BS knowing after mobile relay node is switched to described target BS.
Mobile relay node gateway function can be carried out in the base station 180 of the present embodiment, and can to target BS, provide the gateway information of mobile relay node, impels target BS to carry out gateway change to realize the gateway function of this base station 180.Described information provides module 182 further to comprise:
Carry unit, for when sending handover request message to target BS, in handover request message, carry the gateway information of described base station 180;
Or response unit, for providing the gateway information of described mobile relay node 180 to described target BS after the gateway change request receiving target BS.
The schematic diagram of a kind of base station that Figure 19 provides for the embodiment of the present invention 19, this base station 190 comprises:
The first sending module 191, be used for to terminal MME transmit path handover request message, described path handover request message comprises the information of at least 2 terminals, described at least 2 terminals belong to described terminal MME, and described path handover request message is switched to base station 190 for requesting terminal MME by its gateway path;
The first receiver module 192, the path switching response message sending for receiving terminal MME.
The path change that request message is realized at least 2 terminals that belong to a terminal MME can be switched by a footpath in this base station.
The schematic diagram of a kind of terminal MME that Figure 20 provides for the embodiment of the present invention 20, this terminal MME200 comprises:
The second receiver module 201, for RX path handover request message, described path handover request message comprises the information of at least 2 terminals, and described at least 2 terminals belong to local terminal, and described path handover request message is used for asking this terminal MME200 that gateway path is switched to target BS;
The first change module 202, for being switched to target BS by the gateway path of terminal MME200.
Further, this terminal MME200 can comprise: the second sending module 203, and for transmit path switching response message.
This terminal MME200 can RX path handover request message, can carry out path switching to a plurality of terminals of its subordinate.Terminal MME200 also can comprise: determination module, is defined as one group for described at least 2 terminals being belonged to at least 2 terminals of same terminating gateway; The 3rd sending module, for sending a modification bearing request message to the terminating gateway of this group terminal, comprises the information of this group terminal in this modification bearing request message, to notify the terminating gateway user face of described this group terminal to connect, be switched to target BS.
The schematic diagram of a kind of terminating gateway that Figure 21 provides for the embodiment of the present invention 21, this terminating gateway 210 comprises:
The 3rd receiver module 211, be used for receiving modification bearing request message, described modification bearing request message comprises the information of at least 2 terminals, and described at least 2 terminals belong to described gateway 210, and described modification bearing request message connects user's face to be switched to target BS for notice;
The second change module 212, for connecting user's face to be switched to target BS;
The 4th sending module 213, for replying a modification bearing response message.
This terminating gateway 210 is revised bearing request message by receiving one, and at least 2 end paths of its subordinate are changed, and can save signaling consumption.
In embodiments of the present invention, after MRN switches, a lot of network entities need to carry out gateway path change, target BS (comprising Tandem Gateway function or relaying PGW gateway function), relaying MME, terminal MME, terminating gateway can carry out path switching by various Signalling exchanges, and these network entities can be switched to target BS from source base station by Tandem Gateway address.Before switching, MRN and subordinate terminal thereof are carried out data interaction by source base station and core net; After switching completes, because Tandem Gateway address is changed, MRN and subordinate terminal thereof can be carried out data interaction by target BS and core net.
Be appreciated that when mobile node is a UE, also can be by changing with the similar process implementation gateway of embodiment of the method before.
The schematic diagram of a kind of switching handling method that Figure 22 provides for the embodiment of the present invention 22, the method comprises:
S221:UE sends measurement report to source wireless access network node (take source base station in the present embodiment as example explanation).
The information of the source base station of S222:UE based on measurement report, to target BS, send handover request message, described handover request message comprises the local routing P-GW gateway information of UE, be: during source base station the is integrated local routing P-GW gateway function of UE, carry out the needed information of gateway function.Further, in described handover request message, also can comprise UE and switch after destination address or the identifier (being address or the identifier of target BS) of local routing P-GW gateway function entity of this UE.
S223: target BS is replied switching request acknowledgement message to source base station.
S224: source base station notice UE switches.
Receive after the switching command of source base station, UE just carries out with the synchronizing process of target BS and is linked into Target cell.
After S225:UE has switched, the switching of notification target base station completes.
S226: switched and be successfully linked into after target BS at UE, the local routing P-GW gateway information of the UE that target BS utilization receives carries out gateway change (relocation), for UE provides local routing gateway function, particularly, the gateway destination address of UE can be changed to address or the sign of described target BS self.
In this step, can say that the UE local routing gateway entity function in source base station entity transfers in the UE local routing gateway entity of target BS, realized Tandem Gateway change, the UE local routing gateway entity in target BS (or directly saying target BS) can distribute a new IP address for UE thus.
S227: the UE local routing gateway function entity in target BS is that UE distributes an IP address.Due to Tandem Gateway change, the new gateway of UE can be given new IP address of relay distribution.Gateway entity in target BS (target BS in other words) can send to UE by a concrete message (as gateway address change message) by target BS by described IP address particularly.The IP address that to have comprised this Tandem Gateway in this message be relay distribution; Be appreciated that the Tandem Gateway functional entity in target BS can distribute an IP address identical with former IP address to UE, or it is constant also can to maintain the existing IP of UE address.
S228:UE receives IP address change message, carries out IP address change.Make thus the UE can be by the local routing gateway function entity (Functionality) in target BS for example, for example, to outer net (Internet) initiation business (web).Certainly, the gateway entity is not here an independently entity, but within being integrated in base station, is a part for base station functions, and using it as entity, being described is here only for the ease of understanding.
Alternatively, also can comprise that S228 ': UE replys IP address change and replys message, confirm its IP address change.
S229: the MME of target BS notice UE carries out the change of end path (Path), target BS, by the MME of the local routing gateway information notice UE of UE, makes MME change path.Concrete, target BS sends Path switch request (path change) message to terminal MME, notifies changing cells of this UE of described MME, particular content in message, and the parameter comprising is as embodiment five, described in step S56.
The MME of S2210:UE is after changing end path, and transmit path is changed return information.
S2211: carry out bearer update between target BS (HeNB) and UE, the EPS carrying of terminal is remapped on the radio bearer of UE after target side base station is upgraded simultaneously.
S2212: the change flow of carrying out UE local routing gateway between the strategy execution of target BS (HeNB) and UE MME and UE and charging entity (PCRF).That is to say, target BS notice PCRF carries out UE local routing gateway and changes to target BS, makes the path handover-target base station of PCRF, so that PCRF and target are carried out information interaction in standing.
The present embodiment is by when UE switches, UE is realized to the gateway change of local routing gateway, target BS provides local routing gateway function for UE, and notify the MME of UE to carry out end path renewal, making the path change between UE MME and source base station is the path between UE MME and target BS, and the path change between UE MME and UE source local routing gateway is the path between the new GW of UE MME-local routing (be integrated in the gateway function entity in target BS, actual is exactly target BS).Be appreciated that said process execution sequence can carry out certain adjustment.
For improving the efficiency of embodiment 22, embodiment 23 upgrades feature message by gateway and is concatenated into and switches in message, the schematic diagram of a kind of switching handling method that Figure 23 provides for the embodiment of the present invention 23, and the method comprises:
S231:UE sends measurement report to source wireless access network node (take source base station as example).
The information of the source base station of S232:UE based on measurement report, to target BS, send handover request message, described handover request message comprises the local routing P-GW gateway information of UE, be: during source base station the is integrated local routing P-GW gateway function of UE, carry out the needed information of gateway function.Further, after also can comprising UE in described handover request message and switching, destination address or the identifier of the local routing P-GW gateway function entity of this UE (are address or the identifier of target BS,), so that the local routing gateway of UE is to communicate by letter rather than source base station with target BS.
S233: target BS local routing gateway function is that UE is in target side preassignment IP address and session updates information.
S234: target BS is replied switching request acknowledgement message to source base station, and carry IP address and session updates information that target side is UE distribution.
S235: source base station notice UE switches, carrying target side is IP address and the session updates information that UE distributes.
Session context and gateway information that the IP address that first S236:UE is its distribution according to target side base station and session updates information updating self preserved.
S237:UE completes session updates with gateway and has upgraded message by being serially connected in UE handoff completion message, and the switching of notification target base station completes.
Receive after the switching command of source base station, UE just carries out with the synchronizing process of target BS and is linked into Target cell.
S238: switched and be successfully linked into after target BS at UE, target is gone to the station to meet somebody and is confirmed that UE has been successfully completed gateway and has upgraded, the local routing P-GW gateway information of the UE that target BS utilization receives carries out gateway change (relocation), for UE provides local routing gateway function, particularly, the gateway destination address of UE can be changed to address or the sign of described target BS self.
In this step, can say that the UE local routing gateway entity function in source base station entity transfers in the UE local routing gateway entity of target BS, realized Tandem Gateway change, the UE local routing gateway entity in target BS (or directly saying target BS) can distribute a new IP address for UE thus.
Make thus the UE can be by the local routing gateway function entity (Functionality) in target BS for example, for example, to outer net (Internet) initiation business (web).Certainly, the gateway entity is not here an independently entity, but within being integrated in base station, is a part for base station functions, and using it as entity, being described is here only for the ease of understanding.
S239: the MME of target BS notice UE carries out the change of middle end path (Path), target BS, by the MME of the local routing gateway information notice UE of UE, makes described MME change path.Concrete, target BS sends Path switch request (path change) message to MME, and this UE of notice MME is changing cells, particular content in message, and the parameter comprising is as embodiment five, described in step S56.
S2310: relaying MME is after changing UE path, and transmit path is changed return information.
S2311: carry out bearer update between target BS (HeNB) and UE, the EPS carrying of terminal is remapped on the radio bearer of UE after target side base station is upgraded simultaneously.
S2312: the change flow of carrying out UE local routing gateway between the strategy execution of target BS (HeNB) and UE MME and UE and charging entity (PCRF).
The present embodiment is by when UE switches, UE is realized to the gateway change of local routing gateway, target BS provides local routing gateway function for UE, and notify the MME of UE to carry out relay route renewal, making the path change between UE MME and source base station is the path between UE MME and target BS, and the path change between UE MME and UE source local routing gateway is the path between the new GW of UE MME--local routing (be integrated in the gateway function entity in target BS, actual is exactly target BS).
Be appreciated that the present embodiment 23 is from the different of embodiment 22: in S233, have a preallocated process in intended gateway IP address, target BS can be UE distributing IP address at this moment.Target BS also can be UE assign sessions lastest imformation further.Be appreciated that the present embodiment switches for UE, and for the process that MRN switches, also can adopt the method for above-mentioned preassignment IP address, making target BS is that MRN distributes an IP address in advance, and the present embodiment is as limiting.Step 231-2311 is equally applicable to relay swicthing scene in a word.
One of ordinary skill in the art will appreciate that all or part of flow process in said method embodiment, can come instruction related hardware to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, and under the premise without departing from the principles of the invention, above-described embodiment can also be made some improvement and modification.

Claims (10)

1. a switching handling method, is characterized in that, comprising:
When mobile node is switched to after target BS, the gateway of described mobile node is altered to described target BS;
Notify the mobile management entity of described mobile node that the gateway path of described mobile management entity is switched to described target BS;
The described mobile management entity of notifying described mobile node is switched to described target BS by the gateway path of described mobile management entity and comprises: notify the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and mobile node gateway, path change is described mobile node and mobile node new gateway;
Notify the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and source base station, path change is described mobile node and described target BS;
Described target BS provides gateway function for described mobile node.
2. method according to claim 1, is characterized in that, also comprises:
For described mobile node distributes an IP address, and described IP address is offered to described mobile node.
3. method according to claim 2, is characterized in that, described mobile node is via node, also comprises:
Between target BS and via node, carry out Radio Resource and reshuffle, the carrying of terminal is mapped to the radio bearer of via node simultaneously.
4. method according to claim 1, is characterized in that, also comprises:
The gateway information of the described mobile node that reception sources base station provides;
Target BS comprises for described mobile node provides gateway function: the gateway information that target BS utilizes described mobile node provides gateway function for described mobile node.
5. according to the method described in claim 1-4 any one, it is characterized in that, the described gateway by mobile node is altered to described target BS and comprises: the part gateway function of described mobile node is transferred to described target BS.
6. according to the method described in claim 1-4 any one, it is characterized in that, described mobile node is a terminal, and the gateway of described terminal is being altered to after described target BS, also comprises:
Notification strategy and charging entity are updated to described target BS by local routing gateway.
7. method according to claim 1, is characterized in that, also comprises: described mobile node is via node or terminal.
8. a base station, is characterized in that, comprising:
Change module, for being switched to when mobile node behind this base station, is altered to this base station by the gateway of described mobile node;
The first notification module, for notifying the mobile management entity of described mobile node that the gateway path of described mobile management entity is switched to described base station; Described the first notification module is specifically for notifying the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and mobile node gateway, path change is described mobile node and mobile node new gateway; Notify the mobile management entity of described mobile node by path between the mobile management entity that between the mobile management entity of described mobile node and source base station, path change is described mobile node and described base station;
Gateway module, is used to described mobile node that gateway function is provided.
9. base station according to claim 8, is characterized in that, also comprises: distribution module, is used to described mobile node to distribute an IP address, and described IP address is offered to described mobile node.
10. base station according to claim 8 or claim 9, is characterized in that, also comprises: information receiving module, the gateway information of the described mobile node providing for reception sources base station;
Correspondingly, the gateway information that described gateway module is configured to utilize described mobile node provides gateway function for described mobile node.
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