Data transfer management in a radio communications network

• US 9,930,580 B2
• Filed: 10/25/2016
• Issued: 03/27/2018
• 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:
  US15/333,901
• Publication Number:
  US 20170048759A1
• Time in Patent Office: 518 Days
• Field of Search: 455438, 455436, 455442, 4554321, 4554351, 370331
• 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 data transfer management for a wireless communications system, the method comprising:

receiving, by a source base station, a measurement report from a mobile terminal;

deciding, by the source base station, a handover of the mobile terminal based on the measurement report; and

transmitting, by the source base station, status information to a target base station,

wherein the status information comprises first information related to a data unit not received from the mobile terminal on an uplink, and second information related to downlink data transmission from the target base station to the mobile terminal on a downlink.

2. The method of claim 1, further comprising:

transmitting, by the source base station, context data of the mobile terminal to the target base station, wherein the context data is to prepare for the handover of the mobile terminal to the target base station.

3. The method of claim 1, further comprising:

receiving, by the source base station, identification information from the target base station, wherein the identification information comprises a new Cell-Radio Network Temporary Identifier (C-RNTI) of the mobile terminal.

4. The method of claim 1, further comprising:

transmitting, by the source base station, the new C-RNTI to the mobile terminal.

5. The method of claim 1, further comprising:

transmitting, by the source base station, a command to the mobile terminal to command the mobile terminal to perform the handover to the target base station.

6. A source base station, comprising:

a Medium Access Control (MAC) entity;

a Radio Link Control (RLC) entity connected to the MAC entity; and

a Radio Resource Control (RRC) entity connected to the RLC entity, wherein the source base station is configured to;

receive a measurement report from a mobile terminal;

decide handover of the mobile terminal based on the measurement report; and

transmit status information to a target base station, wherein the status information comprises first information related to a data unit not received from the mobile terminal on an uplink, and second information related to downlink data transmission from the target base station to the mobile terminal on a downlink.

7. The source base station of claim 6, wherein the source base station is further configured to:

transmit context data of the mobile terminal to the target base station, wherein the context data is to prepare for the handover of the mobile terminal to the target base station.

8. The source base station of claim 6, wherein the source base station is further configured to:

receive identification information from the target base station, wherein the identification information comprises a new Cell-Radio Network Temporary Identifier (C-RNTI) of the mobile terminal.

9. The source base station of claim 6, wherein the source base station is further configured to:

transmit the new C-RNTI to the mobile terminal.

10. The source base station of claim 6, wherein the source base station is further configured to:

transmit a command to the mobile terminal to command the mobile terminal to perform the handover to the target base station.