Method for performing handover in wireless communication system and apparatus for same

• US 9,432,900 B2
• Filed: 04/02/2012
• Issued: 08/30/2016
• Est. Priority Date: 04/08/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Youngdae, Jung, Sunghoon, Yi, Seungjune, Chun, Sungduck, Park, Sungjun
• Primary Examiner(s): Kincaid, Lester
• Assistant Examiner(s): Bassett, Daniel G
• Application Number:
  US13/985,820
• Publication Number:
  US 20130324129A1
• Time in Patent Office: 1,611 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04W 36/0007 for multicast or broadcast services, e.g. MBMS multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40
• CPC Class Codes: H04W 36/0088 Scheduling hand-off measurements
• CPC Class Codes: H04W 36/24 Reselection being triggered by specific parameters
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/566 of the information or information source or recipient
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast
• CPC Class Codes: H04W 8/20 Transfer of user or subscriber data

Abstract

The present invention relates to a method for a user equipment performing a handover in a wireless communication system, and more specifically, comprises the following steps: transmitting to a serving cell a measurement report message on a target cell including an indicator related to a specific service; receiving from the serving cell a handover command message including information on the specific service, which is provided by the target cell; receiving resource allocation information on the specific service from the target cell using the information on the specific service; and transmitting a handover completion message to the target cell.

Claims

1. A method of performing a handover by a user equipment (UE) in a wireless communication system, the method comprising:

transmitting a measurement report message for a target cell to a serving cell, wherein the measurement report message includes an indicator for a specific Multimedia Broadcast Multicast Service (MBMS) service indicating whether the specific MBMS service is being received or is intended to be received by the UE and a MBMS Single Frequency Network (MBSFN) area identifier corresponding to the specific MBMS service;

receiving a handover command message including MBSFN subframe information for the specific MBMS service, masking information for obtaining the resource allocation information of the specific MBMS service and a list of MBSFN areas for providing the specific MBMS service from the serving cell;

receiving a MBMS notification from the target cell based on the information included in the handover command message; and

identifying information regarding session start and the resource allocation used for receiving MBMS data in a specific MBSFN area based on the MBMS notification.

2. The method of claim 1, wherein the measurement report message for the target cell further includes at least one of information on a frequency for providing the specific MBMS service and an identifier of the specific MBMS service.

3. A method of performing a handover by a cell in a wireless communication system, the method comprising:

receiving, at a source cell, a measurement report message for a target cell from a user equipment (UE), wherein the measurement report message includes an indicator related to a specific Multimedia Broadcast Multicast Service (MBMS) service indicating whether the specific MBMS service is being received or is intended to be received by the UE and a MBMS Single Frequency Network (MBSFN) area identifier corresponding to the specific MBMS service;

transmitting, from a source cell, a handover request message including information indicating the specific MBMS service to the target cell;

receiving, at the source cell, a handover response message including information on the specific MBMS service from the target cell; and

transmitting, from the source cell, a handover command message including MBSFN subframe information for the specific MBMS service, masking information for obtaining the resource allocation information of the specific MBMS service and a list of MBSFN areas for providing the specific MBMS service to the UE;

transmitting, from the target cell, transmits a MBMS notification to the UE using the information included in the handover command message; and

transmitting, from the target cell to the UE, MBMS data in a specific MBSFN area, in response to a session start and a resource allocation as identified by the UE based on the MBMS notification.

4. The method of claim 3, wherein the user equipment receives resource allocation information of the specific MBMS service from the target cell using the information on the specific MBMS service and sends a handover completion message to the target cell.

5. The method of claim 3, wherein the measurement report message for the target cell further includes at least one information on a frequency for providing the specific MBMS service and an identifier of the specific MBMS service.