US 8,787,189 B2 · Feedback method and system of channel quality indicatior

Abstract

A method of CQI feedback comprises: in a CoMP system, a terminal feeding back a CQI corresponding to a comprehensive channel formed between the terminal and all transmission nodes in a CATS or each CQI corresponding to each channel between the terminal and each transmission node. A system of CQI feedback; in the system is also disclosed, a feedback unit at the terminal side is used in the CoMP system to calculate and feed back the CQI corresponding to the comprehensive channel formed between the terminal and all the transmission nodes in the CATS or each CQI corresponding to each channel between the terminal and each transmission node. With the method and system of the present invention, not only the CQI feedback in the CoMP system can be realized, but also the difference between the CQI feedback in the control channel and that in the traffic channel can be avoided.

Claims17

Dependent claims

A method of channel quality indicator feedback, comprising:

in a multi-point coordinated transmission and reception (CoMP) system, a terminal feeding back a channel quality indicator corresponding to a comprehensive channel formed between the terminal and all transmission nodes in a CoMP active transmission point set, or each channel quality indicator corresponding to each channel between each transmission node and the terminal;
further comprising:
in the CoMP active transmission point set, different transmission nodes applying the same modulation and encoding method.

A system of channel quality indicator feedback, comprising a feedback unit at a terminal side, and a modulation and encoding determination unit at a primary node side;

wherein,
said feedback unit is used in a multi-point coordinated transmission and reception (CoMP) system to calculate and feed back a channel quality indicator corresponding to a comprehensive channel formed between the terminal and all transmission nodes in a CoMP active transmission point set, or each channel quality indicator corresponding to each channel between each transmission node and the terminal;
and
said modulation and encoding determination unit is used to determine a modulation and encoding method corresponding to downlink data transmission according to content fed back by the terminal;
wherein, in the CoMP active transmission point set, different transmission nodes apply the same modulation and encoding method.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/257,790Filed 28 Dec 2009

Priority

CN 2009 1 008037620 Mar 2009

Published

US 2012/0051250 A11 Mar 2012

Granted

22 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 41/5032
Network service management, e.g. ensuring proper service fulfilment according to agreements: generating service level reports
H04B 7/024
Site diversity; Macro-diversity: co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input…
H04B 7/0632
Feedback content: channel quality parameters, e.g. channel quality indicator [CQI]
H04B 7/0641
Feedback format: differential feedback

Feedback method and system of channel quality indicatior

Life of this patent

Feedback method and system of channel quality indicatior

Life of this patent

Abstract

Claims17