US 9,520,922 B2Granted

Downlink channel quality information acquisition method and device

AssigneeHuawei Technologies Co., Ltd.

InventorsDageng Chen, Xiaoyan Bi, Jiayin Zhang

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Abstract

A downlink channel quality information acquisition method includes: a transmission node in a coordinated node set acquires the noise receiving power of a user equipment (UE11) and the interference power on the UE11 of a node in a non-coordinated set; the transmission node in the coordinated node set acquires, via the transmission node in the coordinated node set, an inter-user interference power during the multi-user scheduling and the effective signal receiving power of the UE11; the transmission node in the coordinated node set acquires the interference power on the UE11 of a non-transmission node in the coordinated set; calculating the ratio between the effective signal receiving power and the sum of an interference source power and the noise receiving power of the UE11, and using the ratio as the value of the downlink CQI between the transmission node and the UE11.

Claims12

Dependent claims

A method for obtaining downlink channel quality information, the method comprising:

obtaining, by a transmission node in a cooperative node set, a received noise power of a user equipment, and obtaining, by the transmission node in the cooperative node set, a power of interference to the user equipment from a node in a non-cooperative node set;
obtaining, by the transmission node in the cooperative node set, an inter-user interference power during a multi-user scheduling of the transmission node in the cooperative node set, and a power of useful signal received at the user equipment;
obtaining, by the transmission node in the cooperative node set, a power of interference to the user equipment from a non-transmission node in the cooperative node set, by interacting with the non-transmission node in the cooperative node set;
and
calculating a ratio of the power of received useful signal to a sum of an interference source power and the received noise power of the user equipment, the ratio being taken as a value of the downlink channel quality information (CQI) of a downlink channel between the transmission node and the user equipment, wherein the interference source power comprises the inter-user interference power during the multi-user scheduling of the transmission node in the cooperative node set, the power of interference to the user equipment from the node in the non-cooperative node set, and the power of interference to the user equipment from the non-transmission node in the cooperative node set.

2 more elements

A device for obtaining downlink channel quality information, the device comprising:

one or more processors;
and
a memory storing program instructions that, when executed by the one or more processors, configure the device to:
obtain a received noise power of a user equipment, and obtain a power of interference to the user equipment from a node in a non-cooperative node set;
obtain an inter-user interference power during a multi-user scheduling of a transmission node in a cooperative node set, and obtain a power of useful signal received at the user equipment;
obtain a power of interference to the user equipment from a non-transmission node in the cooperative node set, by interacting with the non-transmission node in the cooperative node set;
and
calculate a ratio of the power of received useful signal to a sum of an interference source power and the received noise power of the user equipment, the ratio being taken as a value of the downlink channel quality information (CQI) of a downlink channel between the transmission node and the user equipment;
wherein the interference source power comprises the inter-user interference power during the multi-user scheduling of the transmission node in the cooperative node set, the power of interference to the user equipment from the node in the non-cooperative node set, and the power of interference to the user equipment from the non-transmission node in the cooperative node set.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/491,590Filed 19 Sep 2014 · continuation
Priority: CN 2012 1 007449620 Mar 2012
Published: US 2015/0009852 A18 Jan 2015
Granted: 13 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

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]
Y02D 30/70
Reducing energy consumption in communication networks: in wireless communication networks
H04B
Transmission

Family

PCT/CN2012/085423Parent of this continuation · filed 28 Nov 2012
US 2015/0009852 A1Pre-grant publication · published 8 Jan 2015
US 9,520,922 B2This patent

From the US filing history. Foreign family members aren’t listed.

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