METHOD AND APPARATUS FOR ADJUSTING POWER CONTROL MODE IN WIRELESS COMMUNICATION SYSTEM

• US 20100119000A1
• Filed: 11/09/2009
• Published: 05/13/2010
• Est. Priority Date: 11/10/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Han, Seunghee, KIM, Dong Cheol, Lee, Hyunwoo, Kwon, Yeong Hyeon, Noh, Minseok
• Granted Patent: US 8,155,688 B2
• Time in Patent Office: Days
• US Class Current: 375/260
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control

Abstract

A method and an apparatus for adjusting power control mode in a wireless communication system is provided. A mode change message is transmitted from a base station (BS) to a user equipment (UE) to request changing a power control mode from a base station (BS). The mode change message comprises a power control mode change (PMC) field which indicates the power control mode to be changed. The UE transmits a UE confirmation message to the BS, and receives a BS confirmation message from the BS. The UE changes the power control mode based on the mode change message.

Claims

1. A method of adjusting power control mode in a wireless communication system, the method comprising:

receiving a mode change message to request changing a power control mode from a base station (BS), the mode change message comprising a power control mode change (PMC) field which indicates the power control mode to be changed, wherein the PMC field indicates one of closed-loop (CL) mode, open-loop (OL) passive retention mode, OL passive reset mode, and OL active mode;

transmitting a user equipment (UE) confirmation message to the BS, the UE confirmation message confirming the receipt of the mode change message; and

receiving a BS confirmation message from the BS, the BS confirmation message confirming the receipt of the UE confirmation message.

2. The method of claim 1, further comprising changing the power control mode based on the mode change message.

3. The method of claim 1, wherein the mode change message comprises a confirmation field which indicates request of the power control mode.

4. The method of claim 1, wherein the BS confirmation message comprises a confirmation field which indicates confirmation of the receipt of the UE confirmation message.

5. The method of claim 4, wherein a size of the confirmation field is 1 bit.

6. A method of adjusting power control mode in a wireless communication system, the method comprising:

transmitting a mode change request message to request changing a power control mode to a base station (BS), the mode change request message comprising a power control mode change (PMC) field which indicates the power control mode to be changed, wherein the PMC field indicates one of closed-loop (CL) mode, open-loop (OL) passive retention mode, OL passive reset mode, and OL active mode;

receiving a BS confirmation message from the BS, the BS confirmation message confirming the receipt of the mode change request message; and

transmitting a user equipment (UE) confirmation message to the BS, the UE confirmation message confirming the receipt of the BS confirmation message.

7. The method of claim 6, further comprising changing the power control mode based on the mode change request message.

8. The method of claim 6, wherein the BS confirmation message comprises a confirmation field which indicates confirmation of the receipt of the UE confirmation message or retainment of the present power control mode.

9. The method of claim 8, wherein a size of the confirmation field is 1 or 2 bit.

10. A user equipment (UE) in a wireless communication system, the UE comprising:

a RF unit for transmitting or receiving a radio signal; and

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

receive a mode change message to request changing a power control mode from a base station (BS), the mode change message comprising a power control mode change (PMC) field which indicates the power control mode to be changed, wherein the PMC field indicates one of closed-loop (CL) mode, open-loop (OL) passive retention mode, OL passive reset mode, and OL active mode;

transmit a UE confirmation message to the BS, the UE confirmation message confirming the receipt of the mode change message; and

receive a BS confirmation message from the BS, the BS confirmation message confirming the receipt of the UE confirmation message.