CN103096393B - A kind of changing method of mobile relay - Google Patents
A kind of changing method of mobile relay Download PDFInfo
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- CN103096393B CN103096393B CN201110332435.2A CN201110332435A CN103096393B CN 103096393 B CN103096393 B CN 103096393B CN 201110332435 A CN201110332435 A CN 201110332435A CN 103096393 B CN103096393 B CN 103096393B
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- 238000000034 method Methods 0.000 title claims abstract description 28
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- JZEPSDIWGBJOEH-UHFFFAOYSA-N 4-decylbicyclo[2.2.1]hept-2-ene Chemical compound C1CC2C=CC1(CCCCCCCCCC)C2 JZEPSDIWGBJOEH-UHFFFAOYSA-N 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
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Abstract
The invention provides a kind of changing method of mobile relay, when being established to the S1 connection of MME in base station, to support in its coverage that the cell list of relay function informs to MME, make MME be informed in which community in its range of management and support mobile relay function, and when needs carry out mobile relay switching, target MME is known, and the current mobile relay that switches to switches, the cell list of the support relay function that such target MME can preserve according to self judges whether Target cell is the community supporting relay function, and judge whether accordingly to allow mobile relay to carry out this S1 switching, thus the handoff failure caused by the community of Target cell non-supporting relay function can be avoided, and then effectively can improve the success rate of S1 switching.
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), expand the application of LTE Rel-8.By the introducing to Relay, achieve and extend the MPS process of two-forty, group mobility, casual network is disposed, and strengthens cell data business throughput, and in the demand of new regional on-premise network.
Fig. 1 is the network structure after introducing relaying.As shown in Figure 1.Via node (Relay Node, RN), wirelessly be connected on a base station (eNB) supporting RN, this eNB is called as relaying eNB (Donor eNB, DeNB), this wave point is an E-UTRA air interface be modified, and is called as Un interface.
RN will support all functions of eNB, and this just means, E-UTRAN Radio interface protocols, and 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, layer 2, wireless heterogeneous networks (RRC) agreement, also has NAS function, because only have RN to support the function of UE, just can be connected to DeNB.
In redaction specification, RN will support mobility (for the ambulant RN of support, being called mobile relay).Like this, for the RN in movement, need to switch along with the change of position by the same with mobile terminal, use the difference of interface protocol, mobile relay to carry out switching according to institute when switching and comprise S1 switching and X2 switches two types.For S1 switches, its target eNB switched belongs to different mobile management entities (MME) from source eNB, need to make relay swicthing to Target cell by MME, namely source eNB needs to carry out alternately by S1 agreement (this agreement supports that eNB and MME carries out the agreement communicated) with MME, handover request is sent to source MME, then by source MME, this request being informed to target MME by forwarding RELOCATION REQUEST message by this request, being completed the handoff procedure of described relaying by target MME notification target eNB.
In current system, time mobile relay carries out S1 switching, network side can not determine whether Target cell is a community supporting mobile relay access.If Target cell is not support the access of 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 the changing method providing a kind of mobile relay, and the method effectively can improve the success rate that mobile relay carries out S1 switching.
In order to achieve the above object, the technical scheme that the present invention proposes is:
A changing method for mobile relay, the method comprises the following steps:
A, when base station access MME time, by S1 connection establishment request message, by the cell notification of support relay functions all in this base station give described MME;
B, when mobile relay need to carry out S1 switch time, this switches to mobile relay switching notice to source MME by switching command (HO Required) message by source base station eNB;
C, described source MME, according to described switching command message, send to target MME and forward RELOCATION REQUEST message, and switch to mobile relay switching notice to described target MME this by described forwarding RELOCATION REQUEST message;
D, described target MME according to described forwarding RELOCATION REQUEST message know this switch to mobile relay switch after, according to the community of the described support relay function known, judge whether this Target cell switched is the community supporting relay function, if, described mobile relay is then allowed 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 base station, to support in its coverage that the cell list of relay function informs to MME, make MME be informed in which community in its range of management and support mobile relay function, and when needs carry out mobile relay switching, target MME is known, and the current mobile relay that switches to switches, the cell list of the support relay function that such target MME can preserve according to self judges whether Target cell is the community supporting relay function, and judge whether accordingly to allow mobile relay to carry out this S1 switching, thus the handoff failure caused by the community of Target cell non-supporting relay function can be avoided, and then effectively can improve the success rate of S1 switching.
Accompanying drawing explanation
Fig. 1 is the schematic network structure after introducing relaying in existing system;
Fig. 2 is the schematic flow sheet of the embodiment of the present invention one.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, 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 S1 switching, make target MME know this switching switching to mobile relay, meanwhile, guarantee whether target MME can be support that the community of relay function accurately judges to Target cell.Like this, target MME can according to this judged result, and refusal mobile relay is switched to not to be supported in the Target cell of relay function, thus effectively can improve the success rate of S1 switching.
The schematic flow sheet of Fig. 2 embodiment of the present invention one, as Fig. 2 shows, this embodiment mainly comprises the following steps:
Step 201, when base station access MME time, by S1 connection establishment request message, by the cell notification of support relay functions all in this base station give described MME.
In this step, during by accessing MME in base station, by base station, having under it is supported that all cell notification of relay function are to MME, make MME can judge in follow-up switching whether Target cell supports the switching of mobile relay, and then can be switched to and do not support in the Target cell of relay function by refusal mobile relay, avoid due to community do not support in the handoff failure that then causes.
Preferably, described notice can be carried out by the mode of cell list, in S1 connection establishment request message, namely carry the cell identification list supporting relay function, will support that the cell notification of relay function is to described MME.
Step 202, when mobile relay need to carry out S1 switch time, this switches to mobile relay switching notice to source MME by switching command message by source base station eNB.
Preferably, can carry relay swicthing indication information by increasing by a relay swicthing indication field in described switching command message, the source MME of making knows that this switches to mobile relay to switch.
Step 203, described source MME, according to described switching command message, send to target MME and forward RELOCATION REQUEST message, and switch to mobile relay switching notice to described target MME this by described forwarding RELOCATION REQUEST message.
When this step of specific implementation, can this switches to mobile relay to switch by direct or indirect mode notification target MME.
Such as, can directly carry relay swicthing indication information by described forwarding RELOCATION REQUEST message, this be switched to target MME described in mobile relay switching notice.
Also international contracted user's mark (IMSI) information forwarding the described mobile relay carried in RELOCATION REQUEST message can be utilized to carry out described notice.Following step can be adopted particularly:
Described source MME sends the forwarding RELOCATION REQUEST message of carrying the IMSI information of described mobile relay to described target MME; Described target MME is according to described IMSI information, and determine that the user of this secondary switching is for mobile relay, like this, just known this switches to mobile relay to switch.
Preferably, specifically can adopt following several method, determine that the user of this secondary switching is for mobile relay:
Method one: described target MME asks to the home subscribed services device (HSS) belonging to described IMSI the subscription data that described IMSI is corresponding, according to described subscription data, can determine that the user that described IMSI is corresponding is mobile relay.
Consider in method two that mobile relay is deployed in usually can estimate on the vehicles of route, therefore can think RN by way of MME can expect, like this, by the subscription data of mobile relay requested is before preserved, the Signalling exchange with HSS can be reduced, shorten handover delay.
Method two is specially: described target MME first searches in the subscription data of the mobile relay of self current preservation whether there is subscription data corresponding to described IMSI, if do not had, then ask to the HSS belonging to described IMSI the subscription data that described IMSI is corresponding, according to described subscription data, determine that the user that described IMSI is corresponding is mobile relay, and preserve subscription data corresponding to described IMSI.
Based on the same consideration of method two in method three, just give described target MME, to reduce the Signalling exchange of MME and HSS by OAM by pre-configured for the mobile relay list in system.
Method three is specially: give described target MME by network operation and maintenance centre (OAM) by the mobile relay list configuration in system in advance; Like this, when determining the user of this secondary switching for mobile relay, target MME only needs to judge whether described IMSI is present in the described mobile relay list of self preserving, and if so, then determines that the user of this secondary switching is for mobile relay.
Step 204, described target MME according to described forwarding RELOCATION REQUEST message know this switch to mobile relay switch after, according to the community of the described support relay function known, judge whether this Target cell switched is the community supporting relay function, if, described mobile relay is then allowed 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, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. a changing method for mobile relay, is characterized in that, the method comprises the following steps:
A, when base station access MME time, by S1 connection establishment request message, by the cell notification of support relay functions all in this base station give described MME;
B, when mobile relay need to carry out S1 switch time, this switches to mobile relay switching notice to source MME by switching command HO Required message by source base station eNB;
C, described source MME, according to described switching command message, send to target MME and forward RELOCATION REQUEST message, and switch to mobile relay switching notice to described target MME this by described forwarding RELOCATION REQUEST message;
D, described target MME according to described forwarding RELOCATION REQUEST message know this switch to mobile relay switch after, according to the community of the described support relay function known, judge whether this Target cell switched is the community supporting relay function, if, described mobile relay is then allowed 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 establishment of S1 described in step a request message supports the cell identification list of relay function by carrying, and will support that the cell notification of relay function is to described MME.
3. method according to claim 1, is characterized in that, this, by carrying relay swicthing indication information, switches to mobile relay switching notice to source MME by switching command message described in step b.
4. method according to claim 1, is characterized in that, forwarding RELOCATION REQUEST message by carrying relay swicthing indication information, this being switched to target MME described in mobile relay switching notice described in step c.
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 carrying the IMSI information of described mobile relay to described target MME;
Described target MME, according to described IMSI information, determines that the user of this secondary switching is for mobile relay.
6. method according to claim 5, is characterized in that, describedly determines that the user of this secondary switching for mobile relay is:
Described target MME asks to the home subscribed services device HSS belonging to described IMSI the subscription data that described IMSI is corresponding, according to described subscription data, determines that the user that described IMSI is corresponding is mobile relay.
7. method according to claim 5, is characterized in that, describedly determines that the user of this secondary switching for mobile relay is:
Described target MME searches in the subscription data of the mobile relay that self preserves whether there is subscription data corresponding to described IMSI, if do not had, ask to the HSS belonging to described IMSI the subscription data that described IMSI is corresponding, according to described subscription data, determine that the user that described IMSI is corresponding 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 in advance by network operation and maintenance centre OAM by the mobile relay list configuration in system;
Describedly determine that the user of this secondary switching 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, then determines that the user of this secondary switching is for mobile relay.
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| CN106162777B (en) * | 2015-04-09 | 2021-03-26 | 中兴通讯股份有限公司 | Relay node switching method and system |
| 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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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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| Publication number | Priority date | Publication date | Assignee | Title |
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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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