METHOD AND APPARATUS FOR UPLINK TRANSMISSION POWER CONTROL AND TIMING IN COORDINATED MULTIPOINT TRANSMISSION SCHEMES

• US 20130083731A1
• Filed: 10/02/2012
• Published: 04/04/2013
• Est. Priority Date: 10/03/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: GAAL, Peter, CHEN, Wanshi, MONTOJO, Juan, XU, Hao
• Granted Patent: US 9,204,399 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 52/08 Closed loop power control
• CPC Class Codes: H04W 52/10 Open loop power control
• CPC Class Codes: H04W 52/146 Uplink power control
• CPC Class Codes: H04W 52/16 Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus of a first cell communicates with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the first cell and data by the second cell to a user equipment (UE) in a range expanded region of the second cell, receives a desired transmission power level for the UE from the second cell, generates control information based on the desired transmission power level, and transmits the control information to the UE.

Claims

1. A method of wireless communication of a first cell, comprising:

communicating with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the first cell and data by the second cell to a user equipment (UE) in a range expanded region of the second cell;

receiving a desired transmission power level for the UE from the second cell;

generating control information based on the desired transmission power level; and

transmitting the control information to the UE.

2. The method of claim 1, wherein the first cell and the second cell have a same cell identifier.

3. The method of claim 1, wherein the first cell is a high-power evolved Node B (eNB) and the second cell is a low-power eNB.

4. The method of claim 1, wherein:

receiving the desired transmission power level for the UE from the second cell comprises receiving information associated with a transmission power control (TPC) of the UE from the second cell; and

transmitting the control information to the UE comprises transmitting to the UE TPC information based on the received information associated with the TPC of the UE, the TPC information being for the UE for adjusting an uplink transmission power.

5. The method of claim 1, further comprising:

transmitting disabling information to the UE indicating that open loop transmission power control (TPC) should be disabled;

receiving information associated with a TPC of the UE from the second cell; and

communicating TPC information to the UE based on the received information associated with the TPC of the UE, the TPC information being for the UE for setting an uplink transmission power.

6. The method of claim 5, wherein the disabling information is for disabling open loop TPC for a physical uplink shared channel (PUSCH).

7. The method of claim 5, wherein the disabling information is for disabling open loop TPC for a physical uplink control channel (PUCCH).

8. The method of claim 5, further comprising determining whether the UE is in the range expanded region, wherein the disabling information is transmitted when the UE is in the range expanded region.

9. The method of claim 1, further comprising:

receiving information associated with a timing advance of the UE from the second cell; and

transmitting to the UE timing advance information based on the received information, the timing advance information being for the UE for adjusting an uplink timing with the second cell.

10. An apparatus for wireless communication, comprising:

means for communicating with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the apparatus and data by the second cell to a user equipment (UE) in a range expanded region of the second cell;

means for receiving a desired transmission power level for the UE from the second cell;

means for generating control information based on the desired transmission power level; and

means for transmitting the control information to the UE.

11. The apparatus of claim 10, wherein the apparatus and the second cell have a same cell identifier.

12. The apparatus of claim 10, wherein the apparatus is a high-power evolved Node B (eNB) and the second cell is a low-power eNB.

13. The apparatus of claim 10, wherein:

the means for receiving the desired transmission power level for the UE from the second cell comprises receiving information associated with a transmission power control (TPC) of the UE from the second cell; and

the means for transmitting the control information to the UE comprises transmitting to the UE TPC information based on the received information associated with the TPC of the UE, the TPC information being for the UE for adjusting an uplink transmission power.

14. The apparatus of claim 10, further comprising:

means for transmitting disabling information to the UE indicating that open loop transmission power control (TPC) should be disabled;

means for receiving information associated with a TPC of the UE from the second cell; and

means for communicating TPC information to the UE based on the received information associated with the TPC of the UE, the TPC information being for the UE for setting an uplink transmission power.

15. The apparatus of claim 14, wherein the disabling information is for disabling open loop TPC for a physical uplink shared channel (PUSCH).

16. The apparatus of claim 14, wherein the disabling information is for disabling open loop TPC for a physical uplink control channel (PUCCH).

17. The apparatus of claim 14, further comprising means for determining whether the UE is in the range expanded region, wherein the disabling information is transmitted when the UE is in the range expanded region.

18. The apparatus of claim 10, further comprising:

means for receiving information associated with a timing advance of the UE from the second cell; and

means for transmitting to the UE timing advance information based on the received information, the timing advance information being for the UE for adjusting an uplink timing with the second cell.

19. A computer program product, comprising:

a computer-readable medium comprising code for;

communicating with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by a first cell and data by the second cell to a user equipment (UE) in a range expanded region of the second cell;

receiving a desired transmission power level for the UE from the second cell;

generating control information based on the desired transmission power level; and

transmitting the control information to the UE.

20. The computer program product of claim 19, wherein the first cell and the second cell have a same cell identifier.

21. The computer program product of claim 19, wherein the first cell is a high-power evolved Node B (eNB) and the second cell is a low-power eNB.

22. The computer program product of claim 19, wherein:

the code for receiving the desired transmission power level for the UE from the second cell comprises code for receiving information associated with a transmission power control (TPC) of the UE from the second cell; and

the code for transmitting the control information to the UE comprises code for transmitting to the UE TPC information based on the received information associated with the TPC of the UE, the TPC information being for the UE for adjusting an uplink transmission power.

23. The computer program product of claim 19, further comprising code for:

transmitting disabling information to the UE indicating that open loop transmission power control (TPC) should be disabled;

receiving information associated with a TPC of the UE from the second cell; and

communicating TPC information to the UE based on the received information associated with the TPC of the UE, the TPC information being for the UE for setting an uplink transmission power.

24. The computer program product of claim 23, wherein the disabling information is for disabling open loop TPC for a physical uplink shared channel (PUSCH).

25. The computer program product of claim 23, wherein the disabling information is for disabling open loop TPC for a physical uplink control channel (PUCCH).

26. The computer program product of claim 23, further comprising code for determining whether the UE is in the range expanded region, wherein the disabling information is transmitted when the UE is in the range expanded region.

27. The computer program product of claim 19, further comprising code for:

receiving information associated with a timing advance of the UE from the second cell; and

transmitting to the UE timing advance information based on the received information, the timing advance information being for the UE for adjusting an uplink timing with the second cell.

28. An apparatus for wireless communication, comprising:

a processing system configured to;

communicate with a second cell in relation to a coordinated multipoint (CoMP) transmission of control information by the apparatus and data by the second cell to a user equipment (UE) in a range expanded region of the second cell;

receive a desired transmission power level for the UE from the second cell;

generate control information based on the desired transmission power level; and

transmit the control information to the UE.

29. The apparatus of claim 28, wherein the apparatus and the second cell have a same cell identifier.

30. The apparatus of claim 28, wherein the apparatus is a high-power evolved Node B (eNB) and the second cell is a low-power eNB.

31. The apparatus of claim 28, wherein the processing system is further configured to:

receive the desired transmission power level for the UE from the second cell comprises receiving information associated with a transmission power control (TPC) of the UE from the second cell; and

transmit the control information to the UE comprises transmitting to the UE TPC information based on the received information associated with the TPC of the UE, the TPC information being for the UE for adjusting an uplink transmission power.

32. The apparatus of claim 28, wherein the processing system is further configured to:

transmit disabling information to the UE indicating that open loop transmission power control (TPC) should be disabled;

receive information associated with a TPC of the UE from the second cell; and

communicate TPC information to the UE based on the received information associated with the TPC of the UE, the TPC information being for the UE for setting an uplink transmission power.

33. The apparatus of claim 32, wherein the disabling information is for disabling open loop TPC for a physical uplink shared channel (PUSCH).

34. The apparatus of claim 32, wherein the disabling information is for disabling open loop TPC for a physical uplink control channel (PUCCH).

35. The apparatus of claim 32, wherein the processing system is further configured to determine whether the UE is in the range expanded region, wherein the disabling information is transmitted when the UE is in the range expanded region.

36. The apparatus of claim 28, the processing system is further configured to:

receive information associated with a timing advance of the UE from the second cell; and

transmit to the UE timing advance information based on the received information, the timing advance information being for the UE for adjusting an uplink timing with the second cell.