HANDOVER METHOD AND SYSTEM, AND APPARATUS

• US 20190215733A1
• Filed: 03/19/2019
• Published: 07/11/2019
• Est. Priority Date: 09/30/2016
• 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: WANG, Jing, Ma, Jie, Lin, Bo
• Granted Patent: US 10,674,410 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 36/0005 Control or signalling for completing the hand-off
• CPC Class Codes: H04W 36/0009 for a plurality of users or terminals, e.g. group communication or moving wireless networks user group management H04W4/08; processing of subscriber group data H04W8/186
• CPC Class Codes: H04W 36/0016 Hand-off preparation specially adapted for end-to-end data sessions
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 52/0219 where the power saving management affects multiple terminals
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of the present invention provide a handover method to simplify a cross-base station handover procedure of a WD in a mobile communication scenario, and reduce power consumption of the WD. The method includes: sending, by a first base station, handover group information to a second base station, where the handover group information includes a first association relationship between a first terminal device and a second terminal device, and the second terminal device can communicate with the first base station through the first terminal device; and receiving, by the first base station, handover response information from the second base station, where the handover response information includes a second association relationship, and the second association relationship is established by the second base station between the first terminal device and the second terminal device based on the first association relationship.

Claims

1. A handover method, comprising:

sending, by a first base station, handover group information to a second base station, wherein the handover group information comprises a first association relationship between a first terminal device and a second terminal device, and the second terminal device is able to communicate with the first base station through the first terminal device; and

receiving, by the first base station, handover response information from the second base station, wherein the handover response information comprises a second association relationship, the second association relationship is established by the second base station between the first terminal device and the second terminal device based on the first association relationship, and the second association relationship is used to hand over a handover group from the first base station to the second base station.

2. The method according to claim 1, before the sending, by a first base station, handover group information to a second base station, further comprising:

determining, by the first base station, the first terminal device and the second terminal device as one handover group.

3. The method according to claim 2, wherein the determining, by the first base station, the first terminal device and the second terminal device as one handover group comprises:

obtaining, by the first base station, context information of at least one of the first terminal device and the second terminal device; and

in responsive to the context information indicating that there is a communication connection relationship or a pairing relationship between the first terminal device and the second terminal device, determining, by the first base station, the first terminal device and the second terminal device as the handover group.

4. The method according to claim 1, wherein the first association relationship comprises at least one of the following relationships:

a mapping relationship between a radio bearer (RB) of the second terminal device and an RB of the first terminal device, a communication connection relationship between the first terminal device and the second terminal device, and a pairing relationship between the first terminal device and the second terminal device.

5. The method according to claim 1, wherein the handover group information further comprises identity indication information, and the identity indication information is used to indicate that the first terminal device is a relay device.

6. The method according to claim 1, wherein the handover group information further comprises relay protocol stack architecture information, and the relay protocol stack architecture information is used to indicate a type of a relay architecture used by the second terminal device to connect to the first base station through the first terminal device.

7. The method according to claim 1, wherein the handover group information further comprises at least one of evolved universal terrestrial radio access network radio access bearer (E-RAB) information of the first terminal device and the second terminal device, and radio resource control (RRC) context information of the first terminal device and the second terminal device.

8. The method according to claim 1, wherein the second association relationship comprises at least one of the following relationships:

a mapping relationship that is between a radio bearer (RB) of the second terminal device and an RB of the first terminal device and that is established by the second base station, a communication connection relationship that is between the first terminal device and the second terminal device and that is established by the second base station, and a pairing relationship that is between the first terminal device and the second terminal device and that is established by the second base station.

9. A handover method, comprising:

receiving, by a second base station, handover group information from a first base station, wherein the handover group information comprises a first association relationship between a first terminal device and a second terminal device, and the second terminal device is able to communicate with the first base station through the first terminal device;

establishing, by the second base station, a second association relationship between the first terminal device and the second terminal device based on the first association relationship; and

sending, by the second base station, handover response information to the first base station, wherein the handover response information carries the second association relationship.

10. The method according to claim 9, wherein the second association relationship comprises at least one of the following relationships:

a mapping relationship between a radio bearer (RB) of the second terminal device and an RB of the first terminal device, a communication connection relationship between the first terminal device and the second terminal device, and a pairing relationship between the first terminal device and the second terminal device.

11. An apparatus, comprising:

a transceiver;

a non-transitory memory storage comprising instructions; and

one or more hardware processors in communication with the non-transitory memory storage, wherein the one or more hardware processors execute the instructions to;

generate handover group information, wherein the handover group information comprises a first association relationship between a first terminal device and a second terminal device, and the second terminal device is able to communicate with the apparatus through the first terminal device;

send the handover group information to a base station; and

receive handover response information from the base station, wherein the handover response information comprises a second association relationship, the second association relationship is established by the base station between the first terminal device and the second terminal device based on the first association relationship, and the association relationship is used to hand over a handover group from the apparatus to the base station.

12. The apparatus according to claim 11, wherein

the one or more hardware processors further execute the instructions to determine the first terminal device and the second terminal device as one handover group.

13. The apparatus according to claim 12, wherein

the one or more hardware processors further execute the instructions to:

obtain context information of at least one of the first terminal device and the second terminal device; and

in responsive to the context information indicating that there is a communication connection relationship or a pairing relationship between the first terminal device and the second terminal device, determine the first terminal device and the second terminal device as the handover group.

14. The apparatus according to claim 11, wherein the first association relationship comprises at least one of the following relationships:

a mapping relationship between a radio bearer (RB) of the second terminal device and an RB of the first terminal device, a communication connection relationship between the first terminal device and the second terminal device, and a pairing relationship between the first terminal device and the second terminal device.

15. The apparatus according to claim 11, wherein the handover group information further comprises identity indication information, and the identity indication information is used to indicate that the first terminal device is a relay device.

16. The apparatus according to claim 11, wherein the handover group information further comprises relay protocol stack architecture information, and the relay protocol stack architecture information is used to indicate a type of a relay architecture used by the second terminal device to connect to the apparatus through the first terminal device.

17. The apparatus according to claim 11, wherein the handover group information further comprises at least one of evolved universal terrestrial radio access network radio access bearer (E-RAB) information of the first terminal device and the second terminal device, and radio resource control (RRC) context information of the first terminal device and the second terminal device.

18. The apparatus according to claim 11, wherein the second association relationship comprises at least one of the following relationships:

a mapping relationship that is between a radio bearer (RB) of the second terminal device and an RB of the first terminal device and that is established by the base station, a communication connection relationship that is between the first terminal device and the second terminal device and that is established by the base station, and a pairing relationship that is between the first terminal device and the second terminal device and that is established by the base station.

19. An apparatus, comprising:

a transceiver;

a non-transitory memory storage comprising instructions; and

one or more hardware processors in communication with the non-transitory memory storage, wherein the one or more hardware processors execute the instructions to;

receive handover group information from a first base station, wherein the handover group information comprises a first association relationship between a first terminal device and a second terminal device, and the second terminal device is able to communicate with the first base station through the first terminal device;

establish a second association relationship between the first terminal device and the second terminal device based on the first association relationship; and

send handover response information to the first base station, wherein the handover response information carries the second association relationship.

20. The apparatus according to claim 19, wherein the second association relationship comprises at least one of the following relationships:

a mapping relationship between a radio bearer (RB) of the second terminal device and an RB of the first terminal device, a communication connection relationship between the first terminal device and the second terminal device, and a pairing relationship between the first terminal device and the second terminal device.