Method and apparatus for configuring traffic-to-pilot power ratios in heterogeneous networks

Patent metadata

Field	Value
Publication number	US-9313744-B2
Application number	US-201213662207-A
Country	US
Kind code	B2
Filing date	Oct 26, 2012
Priority date	Oct 28, 2011
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

A method, an apparatus, and a computer program product for wireless communication are provided in connection with specifying a traffic-to-pilot (T/P) ratio per subframe and/or resource block to allow a base station to transmit over the subframes and/or resource blocks using varying transmit powers. In one example, a device communicating with the base station can receive a plurality of T/P ratios each related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or resource block, determine a power of a reference signal received from the base station over a carrier of the plurality of carriers, and process a data signal received over the carrier within the specific subframe or resource block based in part on applying, to the power of the reference signal, a T/P ratio of the plurality of T/P ratios corresponding to the carrier.

First claim

What is claimed is:

1. A method for processing signals at a user equipment (UE) based on a traffic-to-pilot (T/P) ratio received from a base station, comprising:
receiving, at the UE, a plurality of T/P ratios, wherein each T/P ratio is related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or a specific resource block, and wherein a T/P ratio for a carrier of the plurality of carriers is a value between zero and one related to a proportion of a power for transmitting data signals and a power for transmitting reference signals;
determining a power of a reference signal received from the base station over a first carrier of the plurality of carriers, wherein the power of the reference signal is determined based on measurements by a receiver at the UE; and
processing a data signal received over the first carrier within the specific subframe or the specific resource block at least by applying, to the determined power of the reference signal, a first T/P ratio of the plurality of T/P ratios corresponding to the first carrier, and wherein an interfering data signal from an interfering base station received in the specific subframe or the specific resource block is at least partially canceled at the UE during the processing of the data signal based on a corresponding T/P ratio transmitted by the interfering base station,
wherein the power of the reference signal is used to demodulate the data signal or to report channel state information based on the data signal.

2. The method of claim 1 , wherein the plurality of T/P ratios is received at the UE in a list or a map.

3. An apparatus for processing signals at a user equipment (UE) based on a traffic-to-pilot (T/P) ratio received from a base station, comprising:
means for receiving, at the UE, a plurality of T/P ratios, wherein each T/P ratio is related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or a specific resource block, and wherein a T/P ratio of a carrier of the plurality of carriers is a value between zero and one related to a proportion of a power for transmitting data signals and a power for transmitting reference signals;
means for determining a power of a reference signal received from the base station over a first carrier of the plurality of carriers, wherein the power of the reference signal is determined based on measurements by a receiver at the UE; and
means for processing a data signal received over the first carrier within the specific subframe or the specific resource block at least by applying, to the determined power of the reference signal, a first T/P ratio of the plurality of T/P ratios corresponding to the first carrier, and wherein an interfering data signal from an interfering base station received in the specific subframe or the specific resource block is at least partially canceled at the UE during the processing of the data signal based on a corresponding T/P ratio transmitted by the interfering base station,
wherein the determined power of the reference signal is used to demodulate the data signal or to report channel state information based on the data signal.

4. The apparatus of claim 3 , wherein the plurality of T/P ratios is received at the UE in a list or a map.

5. An apparatus for processing signals based on a traffic-to-pilot (T/P) ratio received from a base station, comprising:
a processor coupled to a memory, wherein the memory comprises executable instructions to cause the processor to:
receive a plurality of T/P ratios, wherein each T/P ratio is related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or a specific resource block, wherein a T/P ratio of a carrier of the plurality of carriers is a value between zero and one related to a proportion of a power for transmitting data signals and a power for transmitting reference signals;
determine a power of a reference signal received from the base station over a first carrier of the plurality of carriers, wherein the power of the reference signal is determined based on measurements by a receiver at the apparatus; and
process a data signal received over the first carrier within the specific subframe or the specific resource block at least by applying, to the determined power of the reference signal, a first T/P ratio of the plurality of T/P ratios corresponding to the first carrier, and wherein an interfering data signal from an interfering base station received in the specific subframe or the specific resource block is at least partially canceled at the UE during the processing of the data signal based on a corresponding T/P ratio transmitted by the interfering base station,
wherein the determined power of the reference signal is used to demodulate the data signal or to report channel state information based on the data signal.

6. The apparatus of claim 5 , wherein the plurality of T/P ratios is received at the UE in a list or a map.

7. A non-transitory computer-readable medium storing computer-executable code for processing signals at a user equipment (UE) based on a traffic-to-pilot (T/P) ratio received from a base station, comprising:
code executable to cause the UE to receive a plurality of T/P ratios, wherein each T/P ratio is related to a power used by the base station to transmit over one of a plurality of carriers in a specific subframe or a specific resource block, wherein a T/P ratio of a carrier of the plurality of carriers is a value between zero and one related to a proportion of a power for transmitting data signals and a power for transmitting reference signals;
code executable to cause the UE to determine a power of a reference signal received from the base station over a first carrier of the plurality of carriers, wherein the power of the reference signal is determined based on measurements by a receiver at the UE; and
code executable to cause the UE to process a data signal received over the first carrier within the specific subframe or the specific resource block at least by applying, to the determined power of the reference signal, a first T/P ratio of the plurality of T/P ratios corresponding to the first carrier, and wherein an interfering data signal from an interfering base station received in the specific subframe or the specific resource block is at least partially canceled at the UE during the processing of the data signal based on a corresponding T/P ratio transmitted by the interfering base station,
wherein the determined power of the reference signal is used to demodulate the data signal or to report channel state information based on the data signal.

8. The computer-readable medium of claim 7 , wherein the plurality of T/P ratios is received at the UE in a list or a map.

Assignees

• Qualcomm Inc

Inventors

• Damnjanovic Aleksandar
• Damnjanovic Jelena M
• Wei Yongbin

Classifications

• H04W52/34

  TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading · CPC title

• H04W52/143

  Downlink power control · CPC title

• H04W52/16 Primary

  Deriving transmission power values from another channel · CPC title

• H04W52/243

  taking into account interferences · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title