Two outer loop link adaptations for legacy user equipment

Patent metadata

Field	Value
Publication number	US-9344254-B2
Application number	US-201114365183-A
Country	US
Kind code	B2
Filing date	Dec 15, 2011
Priority date	Dec 15, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A base station determines first quality information indicative for a quality of a first part of subframes of a communication channel and a second quality information indicative for a quality of a second part of the subframes of the communication channel. Feedback information is received from a UE being indicative for the quality of the communication channel. A first compensation value is determined based on the first quality information and the feedback information, wherein the compensation value compensates a difference between the first quality information and the feedback information. A second compensation value is determined based on the second quality information and the feedback information, wherein the compensation value compensates a difference between the second quality information and the feedback information. The feedback information is adjusted based on the determined first and second compensation values. The communication channel is configured based on the adjusted feedback information.

First claim

The invention claimed is:

1. A method comprising:
by a base station operating in a communication channel in a cellular network comprising the base station and a further base station adapted to use a further communication channel, wherein the communication channel is divided into subframes, wherein a first part of the subframes of the communication channel is associated in time with a first part of the subframes of the further communication channel, which is unscheduled by the further base station due to a predefined muting pattern, and wherein a second part of the subframes of the communication channel is associated in time with a second part of the subframes of the further communication channel, which is scheduled by the further base station, determining first quality information indicative of the quality of the first part of the subframes of the communication channel and second quality information indicative of the quality of the second part of the subframes of the communication channel;
receiving, by the base station, feedback information from the user equipment being indicative for the quality of the communication channel;
determining a first compensation value based on the first quality information and the feedback information, wherein the first compensation value is adapted for compensating a difference between the first quality information and the feedback information, and a second compensation value based on the second quality information and the feedback information, wherein the second compensation value is adapted for compensating a difference between the second quality information and the feedback information,
adjusting the feedback information based at least in part on the determined first compensation value and the determined second compensation value, and
configuring the communication channel based on the adjusted feedback information.

2. The method as set forth in claim 1 , wherein the first quality information, the second quality information and/or the feedback information correspond to a channel quality indicator.

3. The method as set forth in claim 1 , wherein determining the first quality information and/or the second quality information comprises determining a packet reception status.

4. The method as set forth in claim 1 , the method further comprises determining, by the user equipment, the feedback information by determining a packet reception status.

5. The method as set forth in claim 1 , the method comprising, before determining the first quality information and the second quality information, determining whether the user equipment determines the feedback information for the first part of the subframes of the communication channel and the second part of the subframes of the communication channel separately.

6. The method as set forth in claim 1 , wherein the first compensation value is determined during a first outer loop link adaptation.

7. The method as set forth in claim 1 , wherein the second compensation value is determined during a second outer loop adaptation.

8. The method as set forth in claim 1 , wherein configuring the communication channel comprises scheduling a packet transmission between the base station and the user equipment.

9. The method as set forth in claim 1 , wherein scheduling the packet transmission between the base station and the user equipment comprises configuring the first part of the subframes of the communication channel based on the adjusted feedback information and configuring the second part of the subframes of the communication channel based on the adjusted feedback information.

10. A base station comprising:
at least one processor;
memory storing a program of instructions;
wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the base station to at least:
during operation in a communication channel in a cellular network comprising the base station and a further base station adapted to use a further communication channel, wherein the communication channel is divided into subframes, wherein a first part of the subframes of the communication channel is associated in time with a first part of the subframes of the further communication channel, which is unscheduled by the further base station due to a predefined muting pattern, and wherein a second part of the subframes of the communication channel is associated in time with a second part of the subframes of the further communication channel, which is scheduled by the further base station, determine first quality information indicative of the quality of the first part of the subframes of the communication channel and second quality information indicative of the quality of the second part of the subframes of the communication channel,
receive feedback information from the user equipment indicative of the quality of the communication channel,
determine a first compensation value based on the first quality information and the feedback information, wherein the first compensation value is adapted for compensating a difference between the first quality information and the feedback information, and a second compensation value based on the second quality information and the feedback information, wherein the second compensation value is adapted for compensating a difference between the second quality information and the feedback information,
adjust the feedback information based at least in part on the determined first compensation value and the determined second compensation value, and
configure the communication channel based on the adjusted feedback information.

11. The base station as set forth in claim 10 , wherein the first quality information, the second quality information and/or the feedback information correspond to a channel quality indicator.

12. The base station as set forth in claim 10 , wherein determining the first quality information and/or the second quality information comprises determining a packet reception status.

13. The base station as set forth in claim 10 , wherein the base station is further caused to, before determining the first quality information and the second quality information, determine whether the user equipment determines the feedback information for the first part of the subframes of the communication channel and the second part of the subframes of the communication channel separately.

14. The method as set forth in claim 10 , wherein the first compensation value is determined during a first outer loop link adaptation.

15. A non-transitory computer readable medium storing a program of instructions, execution of which by at least one processor configures an apparatus to at least:
control a base station to, during operation in a communication channel in a cellular network comprising the base station and a further base station adapted to use a further communication channel, wherein the communication channel is divided into subframes, wherein a first part of the subframes of the communication channel is associated in time with a first part of the subframes of the further communication channel, which is unscheduled by the further base station due to a predefined muting pattern, and wherein a second part of the subframes of the communication channel is associated in time with a second part of the subframes of the further communication channel, which is scheduled by the further base station, determine first quality information indicative of the quality of the first part of the subframes of the communication channel and second quality information indicative of the quality of the second part of the subframes of the communication channel,

Assignees

• Wang Yuanye
• Pedersen Klaus Ingemann
• Nokia Solutions & Networks Oy

Inventors

• Wang Yuanye
• Pedersen Klaus Ingemann

Classifications

• H04W72/54

  based on quality criteria · CPC title

• H04L5/006 Primary

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04L1/0035

  evaluation of received explicit signalling · CPC title

• H04W84/045

  using private Base Stations, e.g. femto Base Stations, home Node B · CPC title