Controlling power for contention based uplink transmissions

• US 8,422,446 B2
• Filed: 06/18/2010
• Issued: 04/16/2013
• Est. Priority Date: 06/18/2010
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Laboratories of America Incorporated (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Yamada, Shohei
• Primary Examiner(s): JAIN, RAJ K
• Application Number:
  US12/819,160
• Publication Number:
  US 20110310811A1
• Time in Patent Office: 1,033 Days
• Field of Search: 370/318, 370/320, 370/329, 370/335, 370/346, 455/522, 375/219
• US Class Current: 370/329
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/286 during data packet transmission, e.g. high speed packet access [HSPA]
• CPC Class Codes: H04W 52/32 TPC of broadcast or control channels
• CPC Class Codes: H04W 52/48 during retransmission after error or non-acknowledgment
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

A wireless communication device configured for controlling power for contention based uplink transmissions is described. The wireless communication device includes a processor and instructions stored in memory. The wireless communication device receives one or more power control parameters and performs contention based power control for uplink transmissions. The contention based power control is different from dynamic scheduled grant power control. The wireless communication device sends a contention based uplink transmission.

Claims

1. A wireless communication device configured for controlling power for contention based uplink transmissions, comprising:

a processor;

memory in electronic communication with the processor;

instructions stored in the memory, the instructions being executable to;

receive one or more power control parameters;

perform contention based power control for physical uplink shared channel (PUSCH) transmissions, wherein the contention based power control is different from dynamic scheduled grant power control corresponding to PUSCH transmissions; and

send a contention based PUSCH transmission.

2. The wireless communication device of claim 1, wherein the instructions are further executable to manage a power control adjustment state.

3. The wireless communication device of claim 1, wherein the contention based power control uses one or more parameters different from parameters used for the dynamic scheduled grant power control.

4. The wireless communication device of claim 1, wherein the contention based power control uses one or more contention based power control functions that are different from a normal power control function used for the dynamic scheduled grant power control.

5. The wireless communication device of claim 1, wherein the one or more power control parameters are signaled by a higher layer, and wherein the higher layer comprises one of a radio resource control layer, a radio link control layer and a medium access control layer.

6. The wireless communication device of claim 1, wherein the one or more power control parameters comprise a parameter specific to the wireless communication device.

7. The wireless communication device of claim 1, wherein the one or more power control parameters comprise a parameter specific to a cell.

8. The wireless communication device of claim 1, wherein the instructions are further executable to receive a contention based grant.

9. The wireless communication device of claim 8, wherein the contention based grant comprises a power control command.

10. The wireless communication device of claim 1, wherein the wireless communication device is a User Equipment (UE).

11. A method for controlling power for contention based uplink transmissions, comprising:

receiving one or more power control parameters;

performing, on a wireless communication device, contention based power control for physical uplink shared channel (PUSCH) transmissions, wherein the contention based power control is different from dynamic scheduled grant power control corresponding to PUSCH transmissions; and

sending a contention based PUSCH transmission.

12. The method of claim 11, further comprising managing a power control adjustment state.

13. The method of claim 11, wherein the contention based power control uses one or more parameters different from parameters used for the dynamic scheduled grant power control.

14. The method of claim 11, wherein the contention based power control uses one or more contention based power control functions that are different from a normal power control function used for the dynamic scheduled grant power control.

15. The method of claim 11, wherein the one or more power control parameters are signaled by a higher layer, and wherein the higher layer comprises one of a radio resource control layer, a radio link control layer and a medium access control layer.

16. The method of claim 11, wherein the one or more power control parameters comprise a parameter specific to the wireless communication device.

17. The method of claim 11, wherein the one or more power control parameters comprise a parameter specific to a cell.

18. The method of claim 11, further comprising receiving a contention based grant.

19. The method of claim 18, wherein the contention based grant comprises a power control command.

20. The method of claim 11, wherein the wireless communication device is a User Equipment (UE).