METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER BASED ON ACCUMULATED TRANSMIT POWER CONTROL COMMANDS AND CORRESPONDING UPLINK SUBFRAME SETS

• US 20160029239A1
• Filed: 04/01/2014
• Published: 01/28/2016
• Est. Priority Date: 04/03/2013
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: STERN-BERKOWITZ, Janet A., LEE, Moon-il, SADEGHI, Pouriya, NAYEB NAZAR, Shahrokh, TOOHER, J. Patrick, TAMAKI, Nobuyuki, KINI, Ananth
• Granted Patent: US 10,588,036 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 52/146 Uplink power control
• 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]

Abstract

A method and apparatus are described for controlling uplink (UL) transmission power. A wireless transmit/receive unit (WTRU) may receive a configuration of UL subframe sets and maintain a plurality of transmit power control (TPC) command accumulator values that correspond to respective ones of the UL subframe sets. The WTRU may receive a TPC command in a subframe n of a downlink (DL) transmission, determine a subframe n+k of a UL transmission that the received TPC command corresponds to, determine which of the UL subframe sets the UL transmission subframe n+k belongs to, and adjust a TPC command accumulator value that corresponds to the determined UL subframe set to determine power of the UL transmission when transmitting in the UL transmission subframe, where n is an integer, and k is an integer greater than zero.

Claims

1-20. -20. (canceled)

21. A method, implemented in a wireless transmit/receive unit (WTRU), the method comprising:

receiving an indication of a time/frequency resource in at least one subframe for performing a measurement;

performing the measurement of the indicated time/frequency resource according to the indication; and

sending a report based on the performed measurement, wherein the report includes an indication of a time the measurement was performed.

22. The method of claim 21, wherein the measurement is performed on a set of resource elements (REs).

23. The method of claim 21, wherein the report includes an identification of a subframe or a system frame number (SFN) associated with the measurement.

24. The method of claim 21, wherein the measurement is an interference measurement.

25. The method of claim 24, wherein the report includes an indication of a direction in which the WTRU receives a dominant interference component.

26. The method of claim 24, wherein the interference is measured in zero-power channel state information reference signal (CSI-RS) resources.

27. The method of claim 21, wherein the performing the measurement and the sending the report are performed in an uplink (UL) subframe.

28. A wireless transmit/receive unit (WTRU) comprising:

a receiver configured to receive an indication of a time/frequency resource in at least one subframe for performing a measurement;

a processor configured to perform the measurement of the indicated time/frequency resource according to the indication; and

a transmitter configured to send a report based on the performed measurement, wherein the report includes an indication of a time the measurement was performed.

29. The WTRU of claim 28, further comprising an antenna coupled to the receiver and the transmitter.

30. The WTRU of claim 28, wherein the processor is further configured to perform the measurement on a set of resource elements (REs).

31. The WTRU of claim 28, wherein the report includes an identification of a subframe or a system frame number (SFN) associated with the measurement.

32. The WTRU of claim 28, wherein the measurement is an interference measurement.

33. The WTRU of claim 32, wherein the report includes an indication of a direction in which the WTRU receives a dominant interference component.

34. The WTRU of claim 32, wherein the processor is configured to measure the interference in zero-power channel state information reference signal (CSI-RS) resources.

35. The WTRU of claim 28, wherein the processor is configured to perform the measurement, and the transmitter is configured to send the report, in an uplink (UL) subframe.

36. The WTRU of claim 28, wherein the transmitter is configured to not transmit in UL resources in which the processor is configured to perform the measurement.

37. A base station comprising:

a transmitter configured to send an indication of a time/frequency resource in at least one subframe for performing a measurement; and

a receiver configured to receive a report based on the performed measurement, wherein the report includes an indication of a time the measurement was performed.

38. The base station of claim 37, wherein:

the base station further comprises a processor configured to generate an interference report based on the received report, and

the transmitter is further configured to send the generated interference report to at least one other base station.

39. The base station of claim 37, wherein the measurement is to be performed on a set of resource elements (REs).

40. The base station of claim 37, wherein the report includes an identification of a subframe or a system frame number (SFN) associated with the measurement.