Method and Apparatus for Transmitting Handover Report Message in Wireless Communication System

• US 20140378136A1
• Filed: 01/29/2013
• Published: 12/25/2014
• Est. Priority Date: 01/30/2012
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Kyung Min, Byun, Dae Wook, Ryu, Jin Sook, Xu, Jian
• Granted Patent: US 9,467,915 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04L 41/0668 by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 36/0058 Transmission of hand-off measurement information, e.g. measurement reports
• CPC Class Codes: H04W 36/0079 in case of hand-off failure or rejection
• CPC Class Codes: H04W 36/083 wherein at least one of the access points is a moving node
• CPC Class Codes: H04W 36/38 by fixed network equipment

Abstract

A method and apparatus for transmitting a handover report message in a wireless communication system is provided. A first eNodeB (eNB) serves a first cell which is a coverage hole compensating cell between a source cell and a second cell, and a user equipment (UE) is moving from the source cell to the second cell through the first cell. The first eNB performs a handover procedure for a user equipment (UE) with a source eNB serving the source cell, receives a radio link failure (RLF) indication message from a second eNB serving the second cell, and transmits a handover report message to the source eNB, the handover report message including an indicator which informs the radio link failure.

Claims

1. A method for transmitting, by a first eNodeB (eNB), a handover report message in a wireless communication system, the first eNB serving a first cell which is a coverage hole compensating cell between a source cell and a second cell, the method comprising:

performing a handover procedure for a user equipment (UE) with a source eNB serving the source cell;

receiving a radio link failure (RLF) indication message from a second eNB serving the second cell; and

transmitting a handover report message to the source eNB, the handover report message including an indicator which informs the radio link failure.

2. The method of claim 1, wherein the indicator further indicates that the first cell is the coverage hole compensating cell.

3. The method of claim 1, wherein the indicator further indicates a request of initiating handover faster from the source cell to the first cell.

4. The method of claim 1, wherein the indicator further indicates that the radio link failure is due to the high speed of the UE.

5. The method of claim 1, wherein the UE is moving from the source cell to the second cell through the first cell.

6. A method for receiving, by a source eNodeB (eNB), a handover report message in a wireless communication system, a first target eNB serving a first target cell which is a coverage hole compensating cell between a source cell served by the source eNB and a second target cell, the method comprising:

performing a handover procedure for a user equipment (UE) with the first target eNB; and

receiving a handover report message from the first target eNB, the handover report message including an indicator which informs the radio link failure in the second target cell.

7. The method of claim 6, wherein the indicator further indicates that the first target cell is the coverage hole compensating cell.

8. The method of claim 6, wherein the indicator further indicates a request of initiating handover faster from the source cell to the first target cell.

9. The method of claim 6, wherein the indicator further indicates that the radio link failure is due to the high speed of the UE.

10. The method of claim 6, wherein the UE is moving from the source cell to the second target cell through the first target cell.

11. A first eNodeB (eNB) in a wireless communication system, the first eNB serving a first cell which is a coverage hole compensating cell between a source cell and a second cell, the first eNB comprising:

a radio frequency (RF) unit for transmitting or receiving a radio signal; and

a processor, operatively coupled to the RF unit, and configured for;

performing a handover procedure for a user equipment (UE) with a source eNB serving the source cell;

receiving a radio link failure (RLF) indication message from a second eNB serving the second cell; and

transmitting a handover report message to the source eNB, the handover report message including an indicator which informs the radio link failure.

12. The first eNB of claim 11, wherein the indicator further indicates that the first cell is the coverage hole compensating cell.

13. The first eNB of claim 11, wherein the indicator further indicates a request of initiating handover faster from the source cell to the first cell.

14. The first eNB of claim 11, wherein the indicator further indicates that the radio link failure is due to the high speed of the UE.

15. The first eNB of claim 11, wherein the UE is moving from the source cell to the second cell through the first cell.