Method for handover in mobile communication system

• US 8,072,938 B2
• Filed: 11/03/2006
• Issued: 12/06/2011
• Est. Priority Date: 01/05/2006
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Young Dae, Chun, Sung Duck, Jung, Myung Cheul, Park, Sung Jun
• Primary Examiner(s): Shah, Chirag
• Assistant Examiner(s): REDDIVALAM, SRINIVASA R
• Application Number:
  US12/159,845
• Publication Number:
  US 20090129335A1
• Time in Patent Office: 1,859 Days
• Field of Search: None
• US Class Current: 370/331
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04W 36/0072 of resource information of target access point
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method and apparatus is provided to enable a network to more efficiently determine whether additional reverse links can be assigned. Various methods are presented that allow a network to determine either the transmission power or power headroom of a mobile terminal based on information that is provided at session startup and information provided periodically. The number of additional reverse links that can be assigned to the mobile can then be estimated from the transmission power and head-room of the mobile terminal.

Claims

1. A method for receiving control information for a handover in a mobile communication system, the method comprising:

receiving a handover command including handover resource information for a mobile station from a first base station, wherein the handover resource information is provided by a second base station to the first base station; and

establishing a connection with the second base station by performing a random access procedure for the handover using the handover resource information,

wherein the handover resource information includes information indicating a mobile station transmission power level to be allocated to the mobile station, and

wherein the mobile station transmission power level to be allocated to the mobile station is higher than a second mobile station transmission power level to be allocated to at least one other mobile station for an attempt to perform a random access procedure to establish an initial connection with the second base station.

2. The method of claim 1, wherein the handover resource information further includes information related to radio resources allocated according to quality of at least one service to be provided to the mobile station.

3. The method of claim 1, wherein the handover resource information further includes information related to radio resources allocated according to priority of the mobile station.

4. The method of claim 1, wherein the first base station is a source base station and the second base station is a target base station.

5. The method of claim 1, wherein radio resources allocated by the handover resource information are valid for a predetermined time.

6. The method of claim 5, wherein the predetermined time is set by the second base station.

7. A method for transmitting control information for a handover in a mobile communication system, the method comprising:

transmitting, by a first base station connected to a mobile station, a handover request to a second base station;

receiving, by the first base station, handover resource information for the mobile station via a handover response from the second base station; and

transmitting, by the first base station, the handover resource information to the mobile station via a handover command, to facilitate performance of a random access procedure by the mobile station for the handover in order to establish a connection with the second base station,

wherein the handover resource information includes information indicating a mobile station transmission power level to be allocated to the mobile station, and

wherein the mobile station transmission power level to be allocated to the mobile station is higher than a second mobile station transmission power level to be allocated to at least one other mobile stations for an attempt to perform a random access procedure to establish an initial connection with the second base station.

8. The method of claim 7, further comprising:

performing, by the second base station, a connection procedure with the mobile station according to radio resources included in the handover resource information.

9. The method of claim 7, wherein the handover resource information further includes information related to radio resources allocated according to quality of at least one service to be provided to the mobile station.

10. The method of claim 7, wherein the handover resource information further includes information related to radio resources allocated according to priority of the mobile station.

11. The method of claim 7, wherein the first base station is a source base station and the second base station is a target base station.

12. The method of claim 7, wherein radio resources allocated by the handover resource information are valid for a predetermined time.

13. The method of claim 12, wherein the predetermined time is set by the second base station.