CN102223669A - Method and system for creating data inverse-transmitting channel and distributing internet protocol - Google Patents
Method and system for creating data inverse-transmitting channel and distributing internet protocol Download PDFInfo
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Abstract
The invention provides a method and a system for creating a data inverse-transmitting channel and distributing an internet protocol; in the method, in the S1 switching process, a target base station receives a switching request message from a core network, wherein the core network carries a first identifier which shows whether inverse transmitting of a direct path exists in a switching request message; and the target base station creates a data inverse-transmitting channel and distributes IP (internet protocol) according to the first identifier. In the technical scheme, data inverse-transmitting can be ensured to be carried out normally when in S1 switching, the data dropout and business interruption can be avoided in the switching process.
Description
Technical field
The present invention relates to Long Term Evolution (Long-Term Evolution abbreviates LTE as) wireless communication field, the establishment data inverse-transmitting passage in a kind of LTE wireless communication field and the method and system of distributing IP.
Background technology
Mobile management is an important attribute of mobile communication system, and switch is exactly the key content of mobile management, reasonably handover operation can reduce user terminal (User Equipment, abbreviate UE as) possibility of call drop, reduce business datum and interrupt, improve the stability of a system and user impression.
In Long Term Evolution (LTE) system, the state of user terminal (UE) is divided into two kinds of connected state (RRC_CONNECTED) and Idle state (RRC_IDLE).When the UE under being in the RRC_CONNECTED state has moved to another sub-district from Serving cell, will trigger handover (handover), to guarantee professional not interrupting.
When UE when the sub-district of a base station (eNB) switches to the sub-district of another eNB, will trigger the switching of striding the base station.If have X2 interface (X2 Interface) between handover source base station and the handover-target base station and when linking to each other with same MME, according to prior art (3GPP agreement, 23.401), source eNB will initiate the switching (X2 InterfaceHandover) through X2 interface, otherwise will initiate the switching (S1 Interface Handover) through the S1 interface.
In order to reduce the interruption of business datum in the S1 handoff procedure, 3GPP has introduced data inverse-transmitting technology (data forwarding), to be source eNB send out on switching the downlink data that will also not have enough time to be handed down to UE when carrying out and UE also fails to be delivered to the AM pattern upstream data anti-pass of core net according to the order of sequence to target eNB, and the PDCP sequence number information passed to target eNB by signaling, deliver by the up-downgoing packet that target eNB is come to anti-pass.Each professional service attribute that source eNB has set up according to switching UE determines whether that needs carry out data inverse-transmitting and bring core net and target eNB with this information by signaling this business datum.
If there is the X2 coupling between source eNB and the target eNB, then carry out the directapath anti-pass, promptly source eNB directly sends to target eNB with the anti-pass data, otherwise carries out non-directapath anti-pass, be that source eNB sends to core net with the anti-pass data, give target eNB by core net with the anti-pass data forwarding again.The anti-pass path is by source eNB decision, and gives core net by the directapath anti-pass colored belt in the order of S1 message, and core net determines whether that according to directapath anti-pass sign needs implement non-directapath anti-pass.
In order to receive the anti-pass data, target eNB need be distributed anti-pass path IP for incision UE needs each business (ERAB) of data inverse-transmitting, and IP is passed to core net by the order of S1 message.If carry out the directapath anti-pass, core net directly sends to source eNB with the IP of target eNB, and source eNB directly sends to target eNB with the anti-pass data; If carry out non-directapath anti-pass, core net is preserved the IP of target eNB, and gives the traffic assignments anti-pass IP that needs anti-pass in core-network side, and this IP is sent to source eNB, source eNB sends to core net with the anti-pass data, and core net is given target eNB with the anti-pass data forwarding.
VLAN (Virtual Local Area Network abbreviates VLAN as) technology is meant in transmission network, and physically a transmission network is divided into a plurality of VLANs, isolates between each VLAN, can not visit mutually.Thereby avoid the broadcast storm that occurs in the network, play data security and privacy functions between each VLAN simultaneously.
ENodeB judges that according to VLAN ID this message belongs to that sub-interface after receiving the data message that has the VLAN label.When message is sent network element, behind routing inquiry, determine the interface number of network element, can encapsulate the pairing VLAN ID of this sub-interface this moment.By the transmitting-receiving message is labelled, according to the VLAN ID difference of label, carry out the differentiation of message, reach the purpose of receiving and dispatching multiple message by a real interface.
LTE eNodeB exists S1/MP/X2 to connect.Consider packet switched core network (Packet Switched Core, abbreviate PS Core as) PS Core (being called for short EPC) and (the Operation Management Center of operation maintenance center, abbreviate OMC as) in most cases all be deployed in the machine room on the network design, divide a VLAN separately so consider S1/MP, the X2 mouth is divided another VLAN separately, make that be in the message of communicating by letter between the base station of same L2 transmission network does not use L3 and carry out routing forwarding.
Be divided under the situation of different VLAN at S1 mouth and X2 mouth, can not visit mutually between the S1 mouth of eNB and the X2 mouth, be equivalent to two virtual different networks.Therefore, receive data if eNB has distributed IP and set up the passage wait on the X2 mouth at the X2 mouth, and data are imported eNB into from the S1 interface, then eNB will not receive.
Yet, do not relate to target eNB in the correlation technique and how to learn that switching is the also direct anti-pass of right and wrong of direct anti-pass according to the path of anti-pass, therefore target eNB can't determine by the S1 mouth still be that the X2 mouth is set up the data inverse-transmitting passage, and the IP that also can't determine the anti-pass passage is IP among the VLAN of distribution S1 mouth or the IP among the VLAN of X2 mouth.This will cause the S1 switching can't normally carry out according to anti-pass, causes data packet loss and service disconnection when switching.
Summary of the invention
Can't normally carry out according to anti-pass at S1 switching in the correlation technique, cause the data packet loss when switching and the problem of service disconnection, the invention provides a kind of method and system of creating data inverse-transmitting passage and distributing IP, one of to address the above problem at least.
According to an aspect of the present invention, provide a kind of method of creating data inverse-transmitting passage and distributing IP.
IP distribution method according to the present invention comprises: in carrying out the S1 handoff procedure, target BS receives the handoff request message that comes from core net, and wherein, whether described core net will be that first sign of directapath anti-pass is carried in the described handoff request message; Target BS is created data inverse-transmitting passage and distributing IP according to first sign.
Before above-mentioned target BS reception comes from the handoff request message of core net, also comprise: after source base station determines to carry out the S1 switching, described core net receives the handoff requirement message that comes from described source base station, wherein, whether be second sign of directapath anti-pass to described handoff requirement message if carrying; Described core net is carried at described first sign in the described handoff request message according to described second sign and sends.
Above-mentioned core net is carried at described first sign to send in the described handoff request message according to described second sign and comprises: if the MME in the described core net does not need to change, then this MME is identified at according to described second increases described first sign in the described handoff request message, and the described handoff request message that will increase after described first sign is sent to described target BS; If the MME in the described core net needs to change, change whether increase is the 3rd sign of directapath anti-pass in the handoff request message before then source MME is identified at according to described second, and the described preceding handoff request message of changeing that will increase after described the 3rd sign is sent to target MME, described target MME is identified at according to the described the 3rd increases described first sign in the described handoff request message, and the described handoff request message that will increase after described first sign is sent to described target BS.
Increasing described first sign or change described before in above-mentioned handoff request message by one of following mode increases described the 3rd sign in the handoff request message: increase described first sign of carrying or the described the 3rd cell that identifies; Use the reserved field in the current cell to carry described first sign or the 3rd sign.
Above-mentioned target BS creates the data inverse-transmitting passage according to described first sign and distributing IP comprises: if the described first sign indication is the directapath anti-pass, then sets up the data inverse-transmitting passage by the X2 mouth, and be the IP of anti-pass data allocations X2 mouth VLAN; If the described first sign indication is not the directapath anti-pass, then sets up the data inverse-transmitting passage, and be the IP of anti-pass data allocations S1 mouth VLAN by the S1 mouth.
Above-mentioned target BS is created after data inverse-transmitting passage and the distributing IP according to described sign, also comprises: described target BS sends switching request acknowledgement message to described core net, wherein, carries the IP of described distribution in the described switching request acknowledgement message.
According to a further aspect in the invention, provide a kind of system of creating data inverse-transmitting passage and distributing IP.
IP distribution system according to the present invention comprises: core net comprises: expansion module, and whether be used for carrying in handoff request message is first sign of directapath anti-pass; Target BS; Target BS comprises: first receiver module, be used for receiving the handoff request message that comes from core net carrying out the S1 handoff procedure, and whether wherein, carrying in the handoff request message is first sign of directapath anti-pass; Processing module is used for creating data inverse-transmitting passage and distributing IP according to first sign.
Said system also comprises: source base station comprises: judging module is used for judgement and whether needs to carry out the S1 switching; First sending module is used to send handoff requirement message, and wherein, whether described handoff requirement message carries is second sign of directapath anti-pass; Then described core net comprises: second receiver module is used for receiving the described handoff requirement message that comes from described source base station after source base station determines to carry out the S1 switching; Second sending module is used for according to described second sign described first sign being carried at described handoff request message and sends.
Above-mentioned processing module comprises; Judging unit is used to judge whether described first sign indicates the directapath anti-pass; Processing unit is used for being output as when being at described judging unit, sets up the data inverse-transmitting passage by the X2 mouth, and is the IP of anti-pass data allocations X2 mouth VLAN; When described judging unit is output as not, sets up the data inverse-transmitting passage by the S1 mouth, and be the IP of anti-pass data allocations S1 mouth VLAN.
Above-mentioned target BS also comprises; The 3rd sending module is used for sending switching request acknowledgement message to described core net, wherein, carries the IP of described distribution in the described switching request acknowledgement message.
By the present invention, whether core net will be that the sign of directapath anti-pass is carried in the handoff request message and sends to target BS, and target BS is created data inverse-transmitting passage and distributing IP according to this sign.Solved that the S1 switching can't normally carry out according to anti-pass in the correlation technique, caused the data packet loss when switching and the problem of service disconnection, and then can guarantee that the S1 switching normally carries out according to anti-pass, data packet loss when avoiding occurring switching and service disconnection situation.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart according to the method for the establishment data inverse-transmitting passage of the embodiment of the invention and distributing IP;
Fig. 2 is the flow chart according to the method for the establishment data inverse-transmitting passage of the preferred embodiment of the present invention one and distributing IP;
Fig. 3 is the interface relationship figure according to UE, handover source eNB, target eNB, MME and the S-GW of the generation S1 switching of the preferred embodiment of the present invention one;
Fig. 4 is the flow chart according to the method for the establishment data inverse-transmitting passage of the preferred embodiment of the present invention two and distributing IP;
Fig. 5 is the interface relationship figure that switches UE, handover source eNB, target eNB, handover source MME, target MME and the S-GW of (S-GW does not change) according to the S1 that strides MME of the preferred embodiment of the present invention two;
Fig. 6 is the structured flowchart according to the system of the establishment data inverse-transmitting passage of the embodiment of the invention and distributing IP;
Fig. 7 is a structured flowchart of creating the system of data inverse-transmitting passage and distributing IP according to the preferred embodiment of the invention.
Embodiment
Hereinafter will describe the present invention with reference to the accompanying drawings and in conjunction with the embodiments in detail.Need to prove that under the situation of not conflicting, embodiment and the feature among the embodiment among the application can make up mutually.
Fig. 1 is the flow chart according to the method for the establishment data inverse-transmitting passage of the embodiment of the invention and distributing IP.As shown in Figure 1, the method for this establishment data inverse-transmitting passage and distributing IP mainly comprises following processing:
Step S102: in carrying out the S1 handoff procedure, target BS receives the handoff request message that comes from core net, and wherein, whether core net will be that first sign of directapath anti-pass is carried in the handoff request message;
Step S104: target BS is created data inverse-transmitting passage and distributing IP according to first sign.
Do not relate to target eNB in the correlation technique and how to learn that switching is the also direct anti-pass of right and wrong of direct anti-pass according to the path of anti-pass, therefore target eNB can't determine by the S1 mouth still be that the X2 mouth is set up the data inverse-transmitting passage, and the IP that also can't determine the anti-pass passage is IP among the VLAN of distribution S1 mouth or the IP among the VLAN of X2 mouth.This will cause the S1 switching can't normally carry out according to anti-pass, causes data packet loss and service disconnection when switching.In the method shown in Figure 1, whether core net will be that the sign of directapath anti-pass is carried in the handoff request message and sends to target BS, and target BS is created data inverse-transmitting passage and distributing IP according to this sign.Solved above-mentioned technical problem, and then can guarantee that the S1 switching normally carries out according to anti-pass, data packet loss when avoiding occurring switching and service disconnection situation.
Preferably, before execution in step S102, can also comprise following processing:
(1) after source base station determined to carry out the S1 switching, core net received the handoff requirement message that comes from source base station, and wherein, whether handoff requirement message carries is second sign of directapath anti-pass;
(2) core net is carried at first sign in the handoff request message according to second sign and sends.
In preferred implementation process, source base station (source eNB) judgement need carrying out S1 switches, and sends switching demand (Handover Required) message by the S1 mouth to core net, and this handoff requirement message includes but not limited to the switching that mobility triggers.Include but not limited to RRC context, UE ability and the directapath anti-pass sign (Direct Forwarding Path Availability) of UE in the Handover Required message.
Preferably, above-mentioned core net is carried at first sign to send in the handoff request message according to second sign and comprises following processing:
If the MME in the core net does not need to change, then this MME is identified at according to second increases by first sign in the handoff request message, and the handoff request message that will increase after first sign is sent to target BS;
If the MME in the core net needs to change, change whether increase is the 3rd sign of directapath anti-pass in the handoff request message before then source MME is identified at according to second, and the preceding commentaries on classics handoff request message that will increase after the 3rd sign is sent to target MME, target MME is identified at according to the 3rd increases by first sign in the handoff request message, and the handoff request message that will increase after first sign is sent to target BS.
Preferably, can in handoff request message, increase above-mentioned first sign or in preceding commentaries on classics handoff request message, increase above-mentioned the 3rd sign by one of following mode:
(1) increases carrying first sign or the 3rd cell that identifies;
(2) use the reserved field in the current cell to carry first sign or the 3rd sign.
In preferred implementation process, core net can be filled in Handover Request message according to the cell in handoff request (Handover Required) message, specifically can be in two kinds of situation: (1) be if MME needs to change, MME sends to target eNB with Handover Request message by the S1 mouth according in the Handover Required message whether be that the sign of directapath anti-pass fills in the Handover Request message whether being the sign of directapath anti-pass.(2) if MME needs to change, whether whether source MME according in the Handover Required message be that the sign of directapath anti-pass fills in the Forward Relocation Request message being the sign of directapath anti-pass, Forward RelocationRequest message is sent to target MME by the S10 mouth, whether target MME fills in according to the directapath anti-pass in Forward Relocation Request message sign in the Handover Request message is the sign of directapath anti-pass, and Handover Request message is sent to target eNB by the S1 mouth.
Wherein, whether can increase directapath anti-pass sign cell in Handover Request message or Forward Relocation Request message, perhaps using reserved field in the existing cell (being above-mentioned current cell) to carry is the sign of directapath anti-pass.
Preferably, above-mentioned steps S104 may further include:
(1) if the first sign indication is the directapath anti-pass, then sets up the data inverse-transmitting passage, and be the IP of anti-pass data allocations X2 mouth VLAN by the X2 mouth;
(2) if the first sign indication is not the directapath anti-pass, then sets up the data inverse-transmitting passage, and be the IP of anti-pass data allocations S1 mouth VLAN by the S1 mouth.
Preferably, after target BS was created data inverse-transmitting passage and distributing IP according to sign, target BS need send switching response message to core net, wherein, carries the IP of distribution in the switching response message.
In preferred implementation process, target eNB for being about to the UE Resources allocation of incision, is prepared wireless resource information according to Handover Request message, waits for that UE inserts.Whether target eNB is according in the Handover Request message being that whether anti-pass is designated up-downgoing anti-pass data creation transmission channel for the sign of directapath anti-pass and business, distributing IP, if above-mentioned sign is designated as the directapath anti-pass, then for the IP of anti-pass data allocations X2 mouth VLAN, otherwise for the IP of anti-pass data allocations S1 mouth VLAN, set up Handover Request Acknowledge (Handover RequestAcknowledge) message then and send to core net, wherein, this switching request acknowledgement message comprises the anti-pass passage purpose IP of the business that needs anti-pass and target eNB is transmitted to UE by core net and source eNB the reallocation message that comprises mobility information (being switching command).
Afterwards, core net is set up switching command (HandoverCommand) message according to Handover Request Acknowledge message, if directapath anti-pass, core net is inserted the professional anti-pass purpose IP that target eNB sends in the Handover Command message, if be non-directapath anti-pass, core net is preserved the purpose IP that target eNB transmits, and to needing the service creation up-downgoing data inverse-transmitting passage of anti-pass, be anti-pass channel allocation purpose IP, the IP that distributes is inserted Handover Command message, send to source eNB by the S1 mouth then.
Source eNB receives Handover Command message, decoding obtains switching command wherein, send to UE, and the up-downgoing anti-pass data that each is professional send on the corresponding IP that carries in the Handover Command message, if be the directapath anti-pass, the anti-pass data have directly sent to target eNB by the X2 mouth; If be non-directapath anti-pass, the anti-pass data send to core net by the S1 mouth, send to target eNB by core net by the S1 mouth again.
UE is linked into target eNB, send reprovision to target eNB and finish message, target eNB sends the switching of HandoverNotify message informing core net to core net and finishes, core net sends the context release command for source eNB, begin to send downlink data and begin to receive upstream data to target eNB, target eNB is issued core net with up anti-pass data, and descending anti-pass data are issued UE, and beginning normal process up-downgoing data, switching is finished.
Through above-mentioned processing, target eNB can correctly be created the anti-pass passage under the situation that the S1 mouth that switches in target eNB of process S1 interface and X2 mouth are divided into different VLAN, distributes anti-pass IP, and the anti-pass data can normally be received.
S1 switching flow figure when describing MME in the core net and do not need to change below in conjunction with Fig. 2 and Fig. 3.
Fig. 2 is the flow chart according to the IP distribution method of the preferred embodiment of the present invention one.Wherein, the annexation figure that carries out UE, eNB that S1 switches, MME, S-GW under the same MME as shown in Figure 3, two eNB all and have the coupling of S1 mouth between the same MME, no X2 mouth between two eNB, two eNB link to each other with same S-GW, have the UU mouth with UE and eNB1 before the switching, promptly eat dishes without rice or wine, the UU mouth that switches back UE and eNB1 is disconnected, sets up the UU mouth with eNB2.It should be noted that among Fig. 2 that MME and S-GW with core net are drawn in the same block diagram.As shown in Figure 2, this IP distribution method mainly comprises following processing:
Step S202: owing to UE goes up reasons such as sending out measurement report or load balancing, between need standing, the UE that triggering source eNB judgement is in the RRC connected state switches, and owing to there is not available X2 mouth, judgement need be carried out S1 and switch, the data inverse-transmitting type is non-directapath anti-pass, all business of UE are the AM pattern, need carry out descending anti-pass.
Step S204: source eNB is set up switching demand (Handover Required) message and is sent to MME by the S1 mouth, includes but not limited to RRC context, UE ability and the directapath anti-pass sign (whether directapath anti-pass be designated FALSE) of UE in the Handover Required message.
Step S206: the MME of core net fills in handoff request (Handover Request) message according to the cell in the Handover Required message, in this message including but not limited to RRC context, the UE ability of UE, the service lists that needs target eNB to set up.
Whether step S208:MME is according in the Handover Required message being the sign of directapath anti-pass, to whether be that the sign cell of directapath anti-pass or the reserved field as directapath anti-pass sign of agreement regulation are changed to FALSE in the Handover Request message
Step S210: Handover Request message is sent to target eNB by the S1 mouth.
Step S212: target eNB for being about to the UE Resources allocation of incision, is prepared wireless resource information according to Handover Request message, waits for that UE inserts.
Step S214: target eNB judges that according in the Handover Request message whether being the FALSE that is designated of directapath anti-pass the anti-pass path is non-directapath anti-pass, is the IP of anti-pass data allocations S1 mouth VLAN;
Step S216: target eNB is set up Handover Request Acknowledge (Handover Request Acknowledge) message and is sent to MME, wherein the reallocation message that comprises mobility information (being switching command) that is transmitted to UE by core net and source eNB including but not limited to the up-downgoing anti-pass data channel purpose IP and the target eNB of the business that needs anti-pass.
Step S218:MME is set up Handover Command message according to Handover Request Acknowledge message.Owing to be non-directapath anti-pass, MME notice S-GW is to switching all service creation up-downgoing anti-pass passages of UE, and the purpose IP that target eNB is distributed brings S-GW.W-GS is anti-pass channel allocation purpose IP and issues MME that MME inserts Handover Command message with the purpose IP that S-GW distributes, and sends to source eNB by the S1 mouth then.
Step S220: source eNB receives Handover Command message, and decoding obtains switching command wherein, sends to UE; The up-downgoing anti-pass data that each is professional send on the purpose IP of the S-GW distribution of carrying in the Handover Command message, the anti-pass data send to the S-GW of core net by the S1 mouth, sent on the purpose IP of target eNB distribution by the S1 mouth by S-GW, target eNB receives up-downgoing anti-pass data again.
Step S222:UE is linked into target eNB, sends reprovision to target eNB and finishes message;
Step S224: target eNB sends Handover Notify message informing MME switching to MME and finishes;
Step S226:MME sends the context release command for source eNB, and notice S-GW toggle path, S-GW stops to send downlink data to source eNB, begin to send the upstream data of downlink data and receiving target eNB to target eNB, target eNB delivers up anti-pass data according to the order of sequence to core net, descending anti-pass data are issued UE, and beginning normal process up-downgoing data, switching is finished.
S1 switching flow figure when describing MME in the core net and do not need to change below in conjunction with Fig. 4 and Fig. 5.
Fig. 4 is the flow chart according to the method for the establishment data inverse-transmitting passage of the preferred embodiment of the present invention two and distributing IP.Wherein, the annexation figure that carries out UE, eNB that S1 switches, MME, S-GW under the different MME as shown in Figure 5, there is the S1 coupling between eNB1 and the MME1, have the S1 coupling between eNB2 and the MME2, eNB1, eNB2, MME1, MME2 all link to each other with same S-GW, have the coupling of X2 mouth between two eNB, there are the UU mouth in UE and eNB1 before switching, promptly eat dishes without rice or wine, the UU mouth that switches back UE and eNB1 is disconnected, sets up the UU mouth with eNB2.As shown in Figure 5, this IP distribution method mainly comprises following processing:
Step S402: go up to send out reasons such as measurement report or load balancing owing to UE, trigger UE that eNB judgement in source is in the RRC connected state and switch between need standing.Because source eNB and target eNB link to each other source eNB judgement need carrying out S1 switching with different MME.Owing between source eNB and the target eNB X2 mouth is arranged, source eNB judgement data inverse-transmitting type is the directapath anti-pass.All business of switching UE are the AM pattern, and need carry out descending anti-pass;
Step S404: source eNB is set up Handover Required message and is sent to source MME by the S1 mouth, include but not limited to RRC context, the UE ability of UE in the HandoverRequired message and whether be the sign (for example, the directapath anti-pass is masked as TRUE) of directapath anti-pass;
Step S406: source MME fills in Forward RelocationRequest according to the cell in the Handover Required message;
Step S408: whether source MME according in the Handover Required message being the TRUE that is designated of directapath anti-pass, and whether fill in the Forward Relocation Request message is the TRUE that is designated of directapath anti-pass;
Step S410: source MME select target MME, and will fill in whether to be the ForwardRelocation Request message of the sign of directapath anti-pass send to target MME;
Step S412: target MME receives Forward Relocation Request, fill in Handover Request message according to the cell in this message, wherein, in this message including but not limited to RRC context, the UE ability of UE, the service lists that needs target eNB to set up;
Whether step S414: target MME is according in the Handover Required message being the sign of directapath anti-pass, whether in Handover Request message be the sign cell of directapath anti-pass or the reserved field as directapath anti-pass sign of agreement regulation be TRUE, Handover Request message is sent to target eNB by the S1 mouth if filling in;
Step S416: target eNB for being about to the UE Resources allocation of incision, is prepared wireless resource information according to Handover Request message, waits for that UE inserts.
Step S418: target eNB judges that according in the Handover Request message whether being the TRUE that is designated of directapath anti-pass the anti-pass path is the directapath anti-pass, is the IP of anti-pass data allocations X2 mouth VLAN;
Step S420: target eNB is set up Handover Request Acknowledge message and is sent to MME, wherein, the Handover Request Acknowledge message reallocation message that comprises mobility information (being switching command) that is transmitted to UE by core net and source eNB including but not limited to the up-downgoing anti-pass data channel purpose IP and the target eNB of the business that needs anti-pass.
Step S422: target MME is set up ForwardRelocation Response message according to Handover Request Acknowledge message, sends to source MME.
Owing to be the directapath anti-pass, target MME directly is filled up to the anti-pass path IP that target eNB is distributed in the ForwardRelocation Response message.
Step S424: source MME is set up Handover Command message according to Forward Relocation Response message, and the anti-pass purpose IP in the Forward Relocation Response message inserted Handover Command message, send to source eNB by the S1 mouth then.
Step S426: source eNB receives Handover Command message, decoding obtains switching command wherein, send to UE, and the up-downgoing anti-pass data that each is professional send to the anti-pass purpose IP that carries in the Handover Command message, be that target eNB receives up-downgoing anti-pass data on the anti-pass purpose IP of target eNB distribution.
Step S428:UE is linked into target eNB, sends reprovision to target eNB and finishes message;
Step S430: target eNB is sent the switching of Handover Notify message informing for target MME and finishes.
Step S432: target MME sends business modification request (Modify Bearer Request) message to S-GW;
Step S434: target MME sends Forward Relocation Complete Notification message for source MME;
Step S436: source MME sends the context release command for source eNB, and source eNB discharges local UE resource.The S-GW toggle path stops to send downlink data to source eNB after sending End Marker bag for source eNB to target eNB, the up-downgoing data on the beginning processing target eNB.Source eNB gives target eNB with the anti-pass of End Marker bag, and target eNB after receiving End Marker bag is delivered up anti-pass data to core net according to the order of sequence, and descending anti-pass data are issued UE, and beginning normal process up-downgoing data, and switching is finished.
Fig. 6 is the structured flowchart according to the system of the establishment data inverse-transmitting passage of the embodiment of the invention and distributing IP.As shown in Figure 6, this IP distribution system mainly comprises: core net 10 and target BS 20; Described core net 10 comprises: expansion module 100, and first sign that is used for whether being the directapath anti-pass is carried at described handoff request message; Target BS 20 may further include: first receiver module 200, be used for receiving the handoff request message that comes from core net carrying out the S1 handoff procedure, and whether wherein, carrying in the handoff request message is first sign of directapath anti-pass; Processing module 202 is used for creating data inverse-transmitting passage and distributing IP according to first sign.
Preferably, as shown in Figure 7, said system can also comprise; Also comprise: source base station 30; Wherein, source base station 30 comprises: judging module 300 is used for judgement and whether needs to carry out the S1 switching; First sending module 302 is used to send handoff requirement message, and wherein, whether handoff requirement message carries is second sign of directapath anti-pass; Core net 10 also comprises: second receiver module 102 is used for receiving the handoff requirement message that comes from source base station after source base station determines to carry out the S1 switching; Second sending module 104 is used for according to second sign first sign being carried at handoff request message and sends.
Preferably, as shown in Figure 7, processing module 202 may further include: judging unit (Fig. 7 is not shown) is used to judge whether first sign indicates the directapath anti-pass; Processing unit (Fig. 7 is not shown) is used for being output as when being at judging unit, sets up the data inverse-transmitting passage by the X2 mouth, and is the IP of anti-pass data allocations X2 mouth VLAN; When judging unit is output as not, sets up the data inverse-transmitting passage by the S1 mouth, and be the IP of anti-pass data allocations S1 mouth VLAN.
Preferably, as shown in Figure 7, target BS 20 also comprises; The 3rd sending module 204 is used for sending switching request acknowledgement message to core net, wherein, carries the IP of distribution in the switching request acknowledgement message.
It should be noted that each module in above-mentioned target BS, source base station and the core net, the preferred implementation that each unit mutually combines specifically can repeat no more referring to the description of Fig. 1 to Fig. 5 herein.
From above description, as can be seen, the present invention has realized following technique effect: on the basis of existing LTE technology, solved the target eNB of dividing VLAN when S1 switches effectively and received the anti-pass data owing to the anti-pass path that can't know switching causes correctly setting up the anti-pass passage, and the problem that can't correctly distribute anti-pass passage IP according to the division of VALN, guaranteed the data inverse-transmitting success that S1 switches, reduce the loss of data and the service disconnection of handoff procedure, greatly improved LTE systematic function and user impression.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, carry out by calculation element thereby they can be stored in the storage device, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
Be the preferred embodiments of the present invention only below, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method of creating data inverse-transmitting passage and assigns the Internet protocol IP is characterized in that, comprising:
In carrying out the S1 handoff procedure, target BS receives the handoff request message that comes from core net, and wherein, whether described core net will be that first sign of directapath anti-pass is carried in the described handoff request message;
Described target BS is created data inverse-transmitting passage and distributing IP according to described first sign.
2. method according to claim 1 is characterized in that, before described target BS reception comes from the handoff request message of core net, also comprises:
After source base station determined to carry out the S1 switching, described core net received the handoff requirement message that comes from described source base station, and wherein, whether described handoff requirement message carries is second sign of directapath anti-pass;
Described core net is carried at described first sign in the described handoff request message according to described second sign and sends.
3. method according to claim 2 is characterized in that, described core net is carried at described first sign to send in the described handoff request message according to described second sign and comprises:
If the MME in the described core net does not need to change, then this MME is identified at according to described second increases described first sign in the described handoff request message, and the described handoff request message that will increase after described first sign is sent to described target BS;
If the MME in the described core net needs to change, change whether increase is the 3rd sign of directapath anti-pass in the handoff request message before then source MME is identified at according to described second, and the described preceding handoff request message of changeing that will increase after described the 3rd sign is sent to target MME, described target MME is identified at according to the described the 3rd increases described first sign in the described handoff request message, and the described handoff request message that will increase after described first sign is sent to described target BS.
4. method according to claim 3 is characterized in that, increasing described first sign or change described before in described handoff request message by one of following mode increases the described the 3rd and identify in the handoff request message:
Increase the cell of described first sign of carrying or described the 3rd sign;
Use the reserved field in the current cell to carry described first sign or the 3rd sign.
5. method according to claim 1 is characterized in that, described target BS creates the data inverse-transmitting passage according to described first sign and distributing IP comprises:
If the described first sign indication is the directapath anti-pass, then sets up the data inverse-transmitting passage, and be the IP of anti-pass data allocations X2 mouth VLAN by the X2 mouth;
If the described first sign indication is not the directapath anti-pass, then sets up the data inverse-transmitting passage, and be the IP of anti-pass data allocations S1 mouth VLAN by the S1 mouth.
6. according to each described method in the claim 1 to 5, it is characterized in that, described target BS is created after data inverse-transmitting passage and the distributing IP according to described sign, also comprise: described target BS sends switching request acknowledgement message to described core net, wherein, carry the IP of described distribution in the described switching request acknowledgement message.
7. a system of creating data inverse-transmitting passage and assigns the Internet protocol IP is characterized in that, comprising: core net and target BS;
Described core net comprises:
Expansion module, first sign that is used for whether being the directapath anti-pass is carried at described handoff request message;
Described target BS comprises:
First receiver module is used for receiving the described handoff request message that comes from described core net carrying out the S1 handoff procedure;
Processing module is used for creating data inverse-transmitting passage and distributing IP according to described first sign.
8. system according to claim 7 is characterized in that,
Also comprise: source base station, described source base station comprises:
Judging module is used for judgement and whether needs to carry out the S1 switching;
First sending module is used to send handoff requirement message, and wherein, whether described handoff requirement message carries is second sign of directapath anti-pass;
Then described core net also comprises:
Second receiver module is used for receiving the described handoff requirement message that comes from described source base station after source base station determines to carry out the S1 switching;
Second sending module is used for according to described second sign described first sign being carried at described handoff request message and sends.
9. system according to claim 7 is characterized in that, described processing module comprises:
Judging unit is used to judge whether described first sign indicates the directapath anti-pass;
Processing unit is used for being output as when being at described judging unit, sets up the data inverse-transmitting passage by the X2 mouth, and is the IP of anti-pass data allocations X2 mouth VLAN; When described judging unit is output as not, sets up the data inverse-transmitting passage by the S1 mouth, and be the IP of anti-pass data allocations S1 mouth VLAN.
10. according to each described system in the claim 7 to 9, it is characterized in that described target BS also comprises:
The 3rd sending module is used for sending switching request acknowledgement message to described core net, wherein, carries the IP of described distribution in the described switching request acknowledgement message.
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| CN201110174678.8A CN102223669B (en) | 2011-06-24 | 2011-06-24 | It creates data inverse-transmitting channel and distributes the method and system of Internet protocol |
| PCT/CN2011/079742 WO2012174798A1 (en) | 2011-06-24 | 2011-09-16 | Method and system for establishing data forwarding channel and allocating internet protocol |
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Also Published As
| Publication number | Publication date |
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| WO2012174798A1 (en) | 2012-12-27 |
| CN102223669B (en) | 2018-06-12 |
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