IP Library › Granted Patent US 8,792,895

Granted Patent B2

US 8,792,895 · App. 13/259,716 · Granted Jul 29, 2014

Processing method and system for multi-carrier handover

Inventor: Yada Huang (Shenzhen, CN)

Assignee: ZTE Corporation

H04W36/0027 H04W92/20

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Quick Facts

Patent No.: US 8,792,895
App. No.: 13/259,716
Granted: Jul 29, 2014
Kind: B2

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Abstract

The present invention discloses processing methods and processing systems for multi-carrier handover, wherein one of the processing methods comprises: a source base station, determining, according to a obtained supported-carrier-aggregation relationship among cells in an adjacent base station, a target Primary Cell (Pcell) and target Secondary Cell (Scell) (s), and notifying a target base station to which the target Pcell and the target Scell (s) belong; the target base station configuring the target Pcell, the target Scell (s) and a corresponding handover command, and sending the handover command to the source base station; and the source base station forwarding the handover command to a user equipment which, according to the handover command, accomplishes a handover process. The present invention achieves the handover in the multi-carrier system.

Claims (96)

1. A processing method for multi-carrier handover, comprising:

a source base station determining, according to an obtained supported-carrier-aggregation relationship among cells in adjacent base stations, a target Primary Cell (Pcell) and target Secondary Cell (Scell) (s), and notifying a target base station to which the target Pcell and the target Scell(s) belong;

the target base station configuring the target Pcell, the target Scell (s) and a corresponding handover command, and sending the handover command to the source base station; and

the source base station forwarding the handover command to a user equipment which, according to the handover command, accomplishes a handover process.

2. The method according to claim 1 , wherein the step of the source base station obtaining the supported carrier-aggregation relationship comprises:

the source base station obtaining the supported-carrier-aggregation relationship through Operation, Administration and Maintenance (OAM) configurations or an information interaction via an X 2 interface.

3. The method according to claim 1 , wherein the step of the user equipment accomplishing the handover process according to the handover command comprises:

the user equipment performing a random access according to the target Pcell indicated in the handover command.

4. The method according to claim 3 , wherein,

the step of the source base station notifying the target base station comprises: the source base station notifying the target base station through a handover request message during X 2 handover; and the step of the target base station sending the handover command to the source base station comprises: the target base station directly sending the handover command to the source base station during X 2 handover; or,

the step of the source base station notifying the target base station comprises: the source base station notifying the target base station through a handover request message via a Mobility Management Entity during S 1 handover; and the step of the target base station sending the handover command to the source base station comprises: the target base station sending the handover command to the source base station via the Mobility Management Entity during S 1 handover.

5. The method according to claim 1 , wherein,

the step of the source base station notifying the target base station comprises: the source base station notifying the target base station through a handover request message during X 2 handover; and

the step of the target base station sending the handover command to the source base station comprises: the target base station directly sending the handover command to the source base station during X 2 handover or,

6. A processing method for multi-carrier handover, comprising:

a source base station determining a target Primary Cell (Pcell) and candidate target Secondary Cell (Scell) (s), and notifying a target base station to which the target Pcell and the candidate target Scell (s) belong;

the target base station configuring the target Pcell (s), selecting target Scell (s) according to information of the candidate target Scell (s), and configuring the target Scell;

the target base station configuring a corresponding handover command according to the target Pcell and the target Scell, and sending the handover command to the source base station; and

the source base station forwarding the handover command to a user equipment which, according to the handover command, accomplishes a handover process.

7. The method according to claim 6 , wherein the step of the target base station selecting the target Scell according to the information of the candidate target Scell (s) comprises:

the target base station, according to the RRM algorithm, aggregation information in the local and the information of the candidate target Scell (s), selecting as the target Scell (s) which can be carrier-aggregated with the target Pcell.

8. The method according to claim 7 , wherein,

9. The method according to claim 6 , wherein the step of the user equipment accomplishing the handover process according to the handover command comprises:

the user equipment performing a random access according to the target Pcell indicated in the handover command.

10. The method according to claim 9 , wherein,

11. The method according to claim 6 , wherein,

the step of the source base station notifying the target base station comprises: the source base station notifying the target base station through a handover request message during X 2 handover; and

the step of the target base station sending the handover command to the source base station comprises: the target base station sending the handover command to the source base station via the Mobility Management Entity during S 1 handover.

12. A processing method for multi-carrier handover, comprising:

a source base station determining a candidate target Primary Cell (Pcell) and candidate target Secondary Cell (Scell) (s), and notifying a target base station to which the candidate target Pcell and the candidate target Scell (s) belong;

the target base station selecting a target Pcell and target Scell (s) according to information of the candidate target Pcell and the candidate target Scell (s);

the target base station configuring the target Pcell, the target Scell (s) and a corresponding handover command, and sending the handover command to the source base station; and

the source base station forwarding the handover command to a user equipment which, according to the handover command, accomplishes a handover process.

13. The method according to claim 12 , wherein the step of the target base station selecting the target Pcell and the target Scell according to the information of the candidate target Pcell and the candidate target Scell (s) comprises:

the target base station, according to a Radio Resource Manage (RRM) algorithm, resource in the local, load information, aggregation information in the local and the information of the candidate target Pcell and the candidate target Scell (s), selecting the target Pcell and the target Scell (s) which can be carrier-aggregated.

14. The method according to claim 13 , wherein,

15. The method according to claim 12 , wherein the step of the user equipment accomplishing the handover process according to the handover command comprises:

the user equipment performing a random access according to the target Pcell indicated in the handover command.

16. The method according to claim 15 , wherein,

17. The method according to claim 12 , wherein,

the step of the source base station notifying the target base station comprises: the source base station notifying the target base station through a handover request message during X 2 handover; and

18. A processing system for multi-carrier handover, comprising a source base station, a target base station and a user equipment, wherein,

the source base station comprises:

a first determination module, adapted to, according to a obtained supported-carrier-aggregation relationship among cells in an adjacent base station, determine a target Primary Cell (Pcell) and target Secondary Cell (Scell) (s);

a first notification module, adapted to notify the determined result determined by the first determination module to the target base station to which the target Pcell and the target Scell belong;

a first receiving module, adapted to receive a handover command from the target base station; and

a first forwarding module, adapted to forward the handover command to the user equipment,

the target base station comprises:

a fourth receiving module, adapted to receive the determined result from the first notification module;

a first configuration module, adapted to configure the target Pcell, the target Scell and a corresponding handover command; and

a first sending module, adapted to send the handover command to the source base station, and

the user equipment comprises:

a fifth receiving module, adapted to receive the handover command from the first forwarding module; and

a first handover module, adapted to accomplish a handover process according to the handover command.

19. A processing system for multi-carrier handover, comprising a source base station, a target base station and a user equipment, wherein,

the source base station comprises:

a second determination module, adapted to determine a target Primary Cell (Pcell) and a candidate target Secondary Cell (Scell) (s);

a second notification module, adapted to notify the determined result determined by the second determination module to the target base station to which the target Pcell and the candidate target Scell belong;

a second receiving module, adapted to receive a handover command from the target base station; and

a second forwarding module, adapted to forward the handover command to the user equipment,

the target base station comprises:

a sixth receiving module, adapted to receive the determined result from the second notification module;

a second selecting module, adapted to select target Scell (s) according to a Radio Resource Manage (RRM) algorithm and information of the candidate target Scell;

a second configuration module, adapted to configure the target Pcell, the target Scell and a corresponding handover command; and

a second sending module, adapted to send the handover command to the source base station, and

the user equipment comprises:

a seventh receiving module, adapted to receive the handover command from the second forwarding module; and

a second handover module, adapted to accomplish a handover process according to the handover command.

20. A processing system for multi-carrier handover, comprising a source base station, a target base station and a user equipment, wherein,

the source base station comprises:

a third determination module, adapted to determine a candidate target Primary Cell (Pcell) and a candidate target Secondary Cell (Scell) (s);

a third notification module, adapted to notify the determined result determined by the third determination module to the target base station to which the candidate target Pcell and the candidate target Scell belong;

a third receiving module, adapted to receive a handover command from the target base station; and

a third forwarding module, adapted to forward the handover command to the user equipment,

the target base station comprises:

an eighth receiving module, adapted to receive the determined result from the third notification module;

a third selecting module, adapted to select a target Pcell and target Scell (s) according to a Radio Resource Manage (RRM) algorithm and information of the candidate target Pcell and the candidate target Scell;

a third configuration module, adapted to configure the target Pcell, the target Scell and a corresponding handover command; and

a third sending module, adapted to send the handover command to the source base station, and

the user equipment comprises:

a ninth receiving module, adapted to receive the handover command from the third forwarding module; and

a third handover module, adapted to accomplish a handover process according to the handover command.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 29, 2011

From: HUANG, YADA

To: ZTE CORPORATION

Reel/Frame 027456/0669 →

Priority Claims (1)

CN 2010 1 0174858 · Apr 30, 2010 · national

Continuity (1)

Related Publication 20120302245A1 · Nov 29, 2012