CN103096393A - Switching method of mobile relay - Google Patents
Switching method of mobile relay Download PDFInfo
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- CN103096393A CN103096393A CN2011103324352A CN201110332435A CN103096393A CN 103096393 A CN103096393 A CN 103096393A CN 2011103324352 A CN2011103324352 A CN 2011103324352A CN 201110332435 A CN201110332435 A CN 201110332435A CN 103096393 A CN103096393 A CN 103096393A
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Abstract
The invention provides a switching method of a mobile relay. When a base station is built on the S1 connection of a mobility management entity (MME), lists of a residential quartet which are in the coverage area of the base station and have relay functions are noticed to the MME so as to enable the MME to know which residential quartes have mobile relay functions within the management area of the MME and enable the target MME to know that the current switch is the mobile relay switch when the mobile relay switch is needed. Therefore, the target MME can judge whether the target residential quarters support a switch failure caused by a residential quarter which does not have the relay functions of the residential quarter according to the lists of the residential quartet which has relay functions, wherein the lists is reserved by the MME, so that switching success rate of the S1 is effectively improved.
Description
Technical field
The present invention relates to the handoff technique in mobile communication system, particularly relate to a kind of S1 changing method of mobile relay.
Background technology
At present, in the LTE-A stage, introduce the concept of relaying (Relay), expanded the application of LTE Rel-8.By the introducing to Relay, realized that the residential quarter of extending two-forty covers, group mobility, casual network is disposed, and strengthens the cell data business throughput, and in the demand of new regional on-premise network.
Fig. 1 is the network structure after the introducing relaying.As shown in Figure 1.Via node (Relay Node, RN) is connected to by wireless mode on the base station (eNB) of a support RN, this eNB is called as relaying eNB (Donor eNB, DeNB), this wave point is an E-UTRA air interface that was modified, and is called as the Un interface.
RN will support all functions of eNB, and this just means, the E-UTRAN Radio interface protocols, and the S1/X2 agreement will terminate at RN.From the angle of agreement, the function that eNB supports, RN will support, unless agreement defines especially.
Except the function of eNB, RN also will support the function of UE, such as physical layer, and layer 2, Radio Resource is controlled (RRC) agreement, also has the NAS function, because only have RN to support the function of UE, just can be connected to DeNB.
In the redaction standard, RN will support mobility (for supporting ambulant RN, being called mobile relay).Like this, for the RN in movement, will equally with mobile terminal need to switch along with the variation of position, the difference of the interface protocol that uses when switching, mobile relay switches and comprises that S1 switches and two types of X2 switchings.For S1 switches, the target eNB of its switching and source eNB belong to different mobile management entities (MME), need to make relay swicthing to Target cell by MME, be that source eNB need to carry out alternately with MME by S1 agreement (this agreement is the agreement of supporting that eNB and MME communicate), send handover request to source MME, then should be asked to ask notice to target MME by forwarding RELOCATION REQUEST message by source MME, be completed the handoff procedure of described relaying by target MME notification target eNB.
In present system, when mobile relay carried out the S1 switching, network side can not determine whether Target cell is a residential quarter of supporting the mobile relay access.If Target cell is not the access of supporting mobile relay, so will handoff failure, thus reduce the success rate of relay swicthing.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of changing method of mobile relay, and the method can effectively improve mobile relay and carry out the success rate that S1 switches.
In order to achieve the above object, the technical scheme of the present invention's proposition is:
A kind of changing method of mobile relay, the method comprises the following steps:
A, when base station access MME, connects by S1 and sets up request message, with in this base station, all support the cell notification of relay functions to described MME;
B, when mobile relay need to carry out S1 when switching, source base station eNB switches to the mobile relay switching notice to source MME by switching command (HO Required) message with this;
C, described source MME send to target MME and forward RELOCATION REQUEST message, and by described forwarding RELOCATION REQUEST message, this is switched to the mobile relay switching notice to described target MME according to described switching command message;
After d, described target MME know that according to described forwarding RELOCATION REQUEST message this switches to mobile relay and switch, residential quarter according to the described support relay function of having known, whether the Target cell that judges this switching is the residential quarter of supporting relay function, if, allow described mobile relay to switch to described Target cell, otherwise, refuse described mobile relay and switch to described Target cell.
in sum, the mobile relay changing method that the present invention proposes, when being established to the S1 connection of MME in the base station, notify to MME supporting the cell list of relay function in its coverage, make MME be informed in which residential quarter support mobile relay function in its range of management, and when needs carry out the mobile relay switching, make target MME know that the current mobile relay that switches to switches, target MME can judge according to the cell list of the support relay function of self preserving whether Target cell is the residential quarter of supporting relay function like this, and judge whether accordingly to allow mobile relay to carry out this S1 switching, thereby can avoid due to the handoff failure due to the residential quarter of the non-support relay function of Target cell, and then can effectively improve the success rate that S1 switches.
Description of drawings
Fig. 1 is the schematic network structure after the introducing relaying in existing system;
Fig. 2 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with the accompanying drawings and the specific embodiments.
Core concept of the present invention is: when mobile relay carries out the S1 switching, make target MME know that this switches to the switching of mobile relay, simultaneously, guarantee whether target MME can be to support the residential quarter of relay function accurately to judge to Target cell.Like this, target MME can be according to this judged result, and the refusal mobile relay switches in the Target cell of not supporting relay function, thereby can effectively improve the success rate that S1 switches.
The schematic flow sheet of Fig. 2 embodiment of the present invention one shows as Fig. 2, and this embodiment mainly comprises the following steps:
In this step, by when the base station access MME, support all cell notification of relay function to MME having under it by the base station, make MME can judge the switching whether Target cell supports mobile relay in follow-up switching, and then can switch in the Target cell of not supporting relay function by the refusal mobile relay, avoid the handoff failure that then causes in not supporting due to the residential quarter.
Preferably, can carry out described notice by the mode of cell list, namely carry the cell identification list of supporting relay function in request message is set up in the S1 connection, will support the cell notification of relay function to described MME.
Preferably, can carry the relay swicthing indication information by increase by a relay swicthing indication field in described switching command message, the source MME of making knows that this switches to mobile relay and switches.
When this step of specific implementation, can this switch to the mobile relay switching by direct or indirect mode notification target MME.
For example, can directly carry the relay swicthing indication information by described forwarding RELOCATION REQUEST message, this is switched to the described target MME of mobile relay switching notice.
Also can utilize international contracted user's sign (IMSI) information that forwards the described mobile relay that carries in RELOCATION REQUEST message to carry out described notice.Can adopt following step particularly:
Described source MME sends the forwarding RELOCATION REQUEST message of the IMSI information of carrying described mobile relay to described target MME; Described target MME determines that according to described IMSI information the user of this less important switching is mobile relay, and like this, just this switches to the mobile relay switching as can be known.
Preferably, specifically can adopt following several method, determine that the user of this less important switching is mobile relay:
Method one: described target MME asks subscription data corresponding to described IMSI to the home subscribed services device (HSS) under described IMSI, according to described subscription data, can determine user corresponding to described IMSI and be mobile relay.
Consider in method two that mobile relay is deployed on the vehicles that can estimate route usually, therefore can think RN by way of MME can expect, like this, preserve by the subscription data of inciting somebody to action the mobile relay that ask before, can reduce the Signalling exchange with HSS, shorten handover delay.
Method two is specially: described target MME first searches in the subscription data of mobile relay of self current preservation whether have subscription data corresponding to described IMSI, if do not have, subscription data corresponding to the described IMSI of request of the HSS under the described IMSI, according to described subscription data, determine that user corresponding to described IMSI is mobile relay, and preserve subscription data corresponding to described IMSI.
Based on the same consideration of method two, just by OAM, that the mobile relay list in system is pre-configured to described target MME in method three, to reduce the Signalling exchange of MME and HSS.
Method three is specially: give described target MME by network operation and maintenance centre (OAM) with the mobile relay list configuration in system in advance; Like this, when the user who determines this less important switching was mobile relay, target MME only need to judge whether described IMSI is present in the described mobile relay list of self preserving, and if so, determines that the user of this less important switching is mobile relay.
After step 204, described target MME know that according to described forwarding RELOCATION REQUEST message this switches to mobile relay and switch, residential quarter according to the described support relay function of having known, whether the Target cell that judges this switching is the residential quarter of supporting relay function, if, allow described mobile relay to switch to described Target cell, otherwise, refuse described mobile relay and switch to described Target cell.
In sum, these are only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. the changing method of a mobile relay, is characterized in that, the method comprises the following steps:
A, when base station access MME, connects by S1 and sets up request message, with in this base station, all support the cell notification of relay functions to described MME;
B, when mobile relay need to carry out S1 when switching, source base station eNB switches to the mobile relay switching notice to source MME by switching command HO Required message with this;
C, described source MME send to target MME and forward RELOCATION REQUEST message, and by described forwarding RELOCATION REQUEST message, this is switched to the mobile relay switching notice to described target MME according to described switching command message;
After d, described target MME know that according to described forwarding RELOCATION REQUEST message this switches to mobile relay and switch, residential quarter according to the described support relay function of having known, whether the Target cell that judges this switching is the residential quarter of supporting relay function, if, allow described mobile relay to switch to described Target cell, otherwise, refuse described mobile relay and switch to described Target cell.
2. method according to claim 1, is characterized in that, the connection of S1 described in step a is set up request message by carrying the cell identification list of supporting relay function, will support the cell notification of relay function to described MME.
3. method according to claim 1, is characterized in that, switching command message described in step b switches to the mobile relay switching notice to source MME by carrying the relay swicthing indication information with this.
4. method according to claim 1, is characterized in that, forwards RELOCATION REQUEST message described in step c by carrying the relay swicthing indication information, and this is switched to the described target MME of mobile relay switching notice.
5. method according to claim 1, is characterized in that, described in step c, notice is:
Described source MME sends the forwarding RELOCATION REQUEST message of the IMSI information of carrying described mobile relay to described target MME;
Described target MME determines that according to described IMSI information the user of this less important switching is mobile relay.
6. method according to claim 5, is characterized in that, the user of the less important switching of described definite basis for mobile relay is:
Described target MME asks subscription data corresponding to described IMSI to the home subscribed services device HSS under described IMSI, according to described subscription data, determines that user corresponding to described IMSI is mobile relay.
7. method according to claim 5, is characterized in that, the user of the less important switching of described definite basis for mobile relay is:
Described target MME searches in the subscription data of the mobile relay of self preserving whether have subscription data corresponding to described IMSI, if do not have subscription data corresponding to the HSS described IMSI of request under the described IMSI, according to described subscription data, determine that user corresponding to described IMSI is mobile relay, and preserve subscription data corresponding to described IMSI.
8. method according to claim 5, is characterized in that, gives described target MME by network operation and the OAM of maintenance centre with the mobile relay list configuration in system in advance;
The user of the less important switching of described definite basis for mobile relay is:
Described target MME judges whether described IMSI is present in the described mobile relay list of self preserving, and if so, determines that the user of this less important switching is mobile relay.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161853A1 (en) * | 2015-04-09 | 2016-10-13 | 中兴通讯股份有限公司 | Relay node switching method and system |
| CN110234140A (en) * | 2019-06-17 | 2019-09-13 | 腾讯科技（深圳）有限公司 | A kind of communication means, device, entity and storage medium |
| CN113825193A (en) * | 2020-06-19 | 2021-12-21 | 展讯通信（上海）有限公司 | Communication method and device |
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| CN102056160A (en) * | 2009-11-03 | 2011-05-11 | 华为技术有限公司 | Method, device and system for generating key |
| CN102123480A (en) * | 2010-01-11 | 2011-07-13 | 中兴通讯股份有限公司 | Notification and transmission method of access capability of relay node |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102056160A (en) * | 2009-11-03 | 2011-05-11 | 华为技术有限公司 | Method, device and system for generating key |
| CN102123480A (en) * | 2010-01-11 | 2011-07-13 | 中兴通讯股份有限公司 | Notification and transmission method of access capability of relay node |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016161853A1 (en) * | 2015-04-09 | 2016-10-13 | 中兴通讯股份有限公司 | Relay node switching method and system |
| CN106162777A (en) * | 2015-04-09 | 2016-11-23 | 中兴通讯股份有限公司 | Via node changing method and system |
| CN106162777B (en) * | 2015-04-09 | 2021-03-26 | 中兴通讯股份有限公司 | Relay node switching method and system |
| CN110234140A (en) * | 2019-06-17 | 2019-09-13 | 腾讯科技（深圳）有限公司 | A kind of communication means, device, entity and storage medium |
| CN110234140B (en) * | 2019-06-17 | 2022-07-08 | 腾讯科技（深圳）有限公司 | Communication method, device, entity and storage medium |
| US12022304B2 (en) | 2019-06-17 | 2024-06-25 | Tencent Technology (Shenzhen) Company Limited | Communication method and apparatus, entity, and storage medium |
| CN113825193A (en) * | 2020-06-19 | 2021-12-21 | 展讯通信（上海）有限公司 | Communication method and device |
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