Method, system and device for mobile station handover

• US 8,477,726 B2
• Filed: 06/24/2010
• Issued: 07/02/2013
• Est. Priority Date: 12/24/2007
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Li, Ting, Zeng, Yunbao, Zhang, Liangliang
• Primary Examiner(s): PHUNKULH, BOB A
• Application Number:
  US12/822,796
• Publication Number:
  US 20100278097A1
• Time in Patent Office: 1,104 Days
• Field of Search: None
• US Class Current: 370/331
• CPC Class Codes: H04B 7/2606 Arrangements for base station coverage control, e.g. by using relays in tunnels
• CPC Class Codes: H04W 36/302 due to low signal strength
• CPC Class Codes: H04W 36/38 by fixed network equipment
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

A method, system and device for MS handover are provided in an embodiment of the present invention. The method includes: receiving the handover-assisting information from the RS by the serving MR-BS; determining whether to recommend the RS to the MS as the target station according to the handover-assisting information by the serving MR-BS. The embodiments of the present invention enable the serving MR-BS to obtain related information from the RS and the serving MR-BS of the MS to better ascertain the potential target station and related information to be recommended to the MS. This helps improve the handover performance of the MS and reduce the failure rate.

Claims

1. A method for Mobile Station (MS) handover, the method comprising:

sending, by a serving Multi-hop Relay Base Station (MR-BS), service information of a MS and service information of a Relay Station (RS) to the RS;

receiving, by the serving MR-BS, handover-assisting information from the RS served by the serving MR-BS, wherein the handover-assisting information comprises association information of the MS, wherein the association information being Uplink Physical Layer (UL PHY) quality information of the MS, wherein the handover-assisting information further comprises a result of judgment by the RS about whether the RS is suitable for being a target station of the MS, and the result of the judgment about whether the RS is suitable for being the target station of the MS is made by the RS according to the service information of the MS and the service information of the RS sent by the serving MR-BS; and

determining, by the serving MR-BS, whether to recommend the RS to the MS as a target station according to the handover-assisting information.

2. The method according to claim 1, wherein the handover-assisting information is unsolicitedly reported by the RS to the serving MR-BS during an association between the RS and the MS.

3. The method according to claim 1, wherein before the serving MR-BS receiving the handover-assisting information from the RS, the method comprising:

requesting, by the serving MR-BS, the handover-assisting information from the RS during an association between the RS and the MS.

4. The method according to claim 3, wherein

the handover-assisting information further comprises service information of the MS from the RS, or an interference measure result.

5. The method according to claim 4, wherein before the serving MR-BS receiving, the handover-assisting information from the RS, the method comprising:

instructing the RS to report the interference measure result by the serving MR-BS after the RS reports an interference.

6. The method according to claim 1, wherein the step of receiving the handover-assisting information from the RS further comprising:

requesting, by the serving MR-BS, for the handover-assisting information from the RS after triggering a MS handover judgment; and

responding the handover-assisting information to the serving MR-BS by the RS after receiving the request of the serving MR-BS.

7. The method according to claim 1, wherein when a serving station of the MS is the RS, the method further comprising:

instructing, by the serving MR-BS, the serving station to report channel quality information between the RS and the MS when a triggering requirement is met.

8. The method according to claim 7, wherein the triggering requirement comprising:

judging, by the serving MR-BS, that a DL link quality reported by the MS through a scanning report is lower than a preset threshold.

9. The method according to claim 1, wherein the serving MR-BS is a neighbor station of the MS, and the serving MR-BS is configured to communicate with a current serving MR-BS of the MS through a backbone network.

10. The method according to claim 9, wherein communicating with the current serving MR-BS of the MS through the backbone network further comprises:

reporting, by the serving MR-BS, the handover-assisting information to the current serving MR-BS of the MS;

or

reporting the result of judgment by the serving MR-BS about whether the RS is suitable for being the target station of the MS according to the service information.

11. A system for mobile station (MS) handover, comprising:

a Relay Station (RS), a serving Multi-hop Relay Base Station (MR-BS) of the RS, and a MS, wherein;

the RS is configured to send handover-assisting information to the serving MR-BS serving the RS, wherein the handover-assisting information comprises association information of the MS, wherein the association information being Uplink Physical Layer (UL PHY) quality information of the MS; and

the serving MR-BS is configured to send service information of the MS and service information of the RS to the RS, and determine whether to recommend the RS to the MS as a target station according to the handover-assisting information;

wherein the handover-assisting information further comprises a result of judgment about whether the RS is suitable for being a target station of the MS, and wherein the result of judgment is made by the RS according to the service information of the MS and the service information of the RS sent by the serving MR-BS.

12. The system according to claim 11, further comprising:

a current serving MR-BS of the MS, configured to communicate with the serving MR-BS of the MS through the backbone network.

13. A serving Multi-hop Relay Base Station (MR-BS) for mobile station (MS) handover, comprising a handover-assisting information processing module, a judging module, and a recommending module, wherein

the handover-assisting information processing module is configured to receive handover-assisting information from a Relay Station (RS) served by the serving MR-BS, wherein the handover-assisting information comprises association information of the MS, wherein the association information being Uplink Physical Layer (UL PHY) quality information of the MS;

the judging module is configured to determine whether to recommend the RS to the MS as a target station according to the handover-assisting information; and

the recommending module, configured to indicate handover related information to the MS according to a result of judgment of the judging module;

wherein the MR-BS is further configured to send service information of the MS and service information of the RS to the RS, and the handover-assisting information further comprises a result of judgment about whether the RS is suitable for being a target station of the MS, and wherein the result of judgment is made by the RS according to the service information of the MS and the service information of the RS sent by the serving MR-BS.

14. The serving MR-BS according to claim 13, further comprising:

a requesting module, configured to request the RS for the handover-assisting information during an association between the RS and the MS.

15. The serving MR-BS according to claim 13, further comprising:

an instruction module, configured to instruct the RS to conduct an interference measure for the MS and instruct the RS to report an interference measure result.

16. A serving Multi-hop Relay Base Station (MR-BS), comprising a handover-assisting information processing module and a communication module, wherein:

the handover-assisting information processing module is configured to receive handover-assisting information from a Relay Station (RS) served by the serving MR-BS, wherein the handover-assisting information comprises association information of a Mobile Station (MS), wherein the association information being Uplink Physical Layer (UL PHY) quality information of the MS; and

the communication module is configured to;

communicate with a current serving MR-BS of the MS through a backbone network, send the handover-assisting information to the current serving MR-BS of the MS;

or judge whether the RS is a target station of the MS according to the handover-assisting information, and return a result of judgment to the current serving MR-BS of the MS;

wherein the communication module further comprises a judging submodule and a sending submodule, wherein

the judging submodule is configured to judge whether the RS is suitable for being the target station of the MS according to the handover-assisting information; and

the sending submodule is configured to return the result of judgment by the judging submodule to the current serving MR-BS of the MS.

17. The serving MR-BS according to claim 16, wherein the communication module further comprises an information sending submodule configured to send the handover-assisting information to the current serving MR-BS of the MS.

18. The serving MR-BS according to claim 16, further comprising a requesting module, configured to request the RS for the handover-assisting information when performing an association between the RS and the MS.

19. The serving MR-BS according to claim 16, further comprising an instruction module, configured to instruct the RS to conduct an interference measure for the MS and instruct the RS to report an interference measure result.

20. The serving MR-BS according to claim 16, further comprising a handover information negotiation module, configured to negotiate with the current serving MR-BS of the MS about handover information.