Data transfer management in a radio communications network

• US 8,831,616 B2
• Filed: 02/07/2013
• Issued: 09/09/2014
• Est. Priority Date: 10/31/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Chun, Sung-Duck, Lee, Young-Dae, Jung, Myung-Cheul, Park, Sung-Jun
• Primary Examiner(s): Ly, Nghi H
• Application Number:
  US13/762,307
• Publication Number:
  US 20140066075A1
• Time in Patent Office: 579 Days
• Field of Search: 455/438, 455/436, 455/442, 455/435.1, 455/452.1, 455/522, 370/331
• US Class Current: 455/438
• CPC Class Codes: H04W 36/0033 with transfer of context information
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/02 Buffering or recovering information during reselection ; Modification of the traffic flow during hand-off
• CPC Class Codes: H04W 36/38 by fixed network equipment
• CPC Class Codes: H04W 36/385 of the core network
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server

Abstract

A mobile communications system including a network with a source network node and a target network node that supports a handover procedure, and a mobile terminal that is allowed to access the source network node and access the target network node according to the handover procedure, in which information related to a reception status of user data is delivered between at least two among a group including the mobile terminal, the source network node, and the target network node such that the target network node may receive status information from the source network node and the target network node may receive a status report from the mobile terminal.

Claims

1. A method of performing a handover procedure in a wireless communications system, the method performed by a mobile terminal comprising:

receiving a handover command from a network;

re-establishing a radio link based upon the received handover command;

transmitting a first status report to a target base station on the re-established radio link; and

receiving a second status report from the target base station on the re-established radio link,

wherein the first status report informs the target base station of user data that has been properly or not properly received by the mobile terminal, and

the second status report informs the mobile terminal of user data that has been properly or not properly received by the network.

2. The method of claim 1, wherein the handover command includes a new temporary identifier for the mobile terminal.

3. The method of claim 1, wherein the re-establishing step further comprises:

detaching from a source base station; and

synchronizing with the target base station.

4. The method of claim 1, further comprising:

sending synchronization information to the target base station; and

receiving, from the target base station, uplink allocation resources and timing advance information for the mobile terminal.

5. The method of claim 1, further comprising:

sending a handover confirm message to the target base station indicating that handover is completed,

wherein the first status report is transmitted to the target base station after sending the handover confirm message.

6. The method of claim 5, wherein the second status report is received from the target base station after handover is completed.

7. The method of claim 1, wherein the first status report is transmitted using a handover confirm message.