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Channel information feedback method and user equipment

A user equipment, channel matrix technology, applied in wireless communication, error prevention/detection using return channel, electrical components, etc., can solve the problems of communication rate reduction, reduction, interference, etc., and achieve the effect of improving channel quality and communication rate

Active Publication Date: 2014-01-15
HUAWEI TECH CO LTD
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  • Claims
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AI Technical Summary

Problems solved by technology

When the user is at the edge of the cell, the large-scale fading of the channel from the user to the serving cell is comparable to the large-scale fading of the channel to the interfering cell. Scheduling, in the scheduling process, the possible interference caused by the scheduling result to the edge user is not considered, which causes the edge user to receive interference comparable to its received signal, resulting in its Channel Quality Indicator (CQI) decreases, and the communication rate also decreases

Method used

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  • Channel information feedback method and user equipment
  • Channel information feedback method and user equipment
  • Channel information feedback method and user equipment

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Embodiment Construction

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0021] figure 1 It is a flowchart of an embodiment of the channel information feedback method of the present invention, such as figure 1 As shown, the channel information feedback method may include:

[0022] Step 101, when the first user equipment is in the coordinated state, after the first user equipment obtains the first channel matrix from ...

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Abstract

The invention provides a channel information feedback method and user equipment. The method comprises the following steps: when first user equipment is in a cooperated state, PCI is calculated, and first CQI when an interference cell doesn't provide interference avoidance to the first user equipment is calculated; BCI is calculated, and second CQI when the interference cell provides interference avoidance to the first user equipment is calculated; and one difference value selected from difference values between PCI, BCI, the first CQI and the second CQI and the first CQI or a combination of the difference values are fed back to a base station where a serving cell is positioned. According to the invention, user equipment positioned on the edge of the cell can feed back both channel information from the user equipment to the serving cell and channel information from the user equipment to the interference cell to the base station such that co-scheduling can be conducted by the base station on cells of the base station. Thus, channel quality and communication speed of the user equipment positioned on the edge of the cell can be raised.

Description

technical field [0001] The present invention relates to communication technology, in particular to a channel information feedback method and user equipment. Background technique [0002] The Universal Mobile Telecommunications System (UMTS for short) is currently the most widely used third-generation mobile communication technology. UMTS uses Wideband Code Division Multiple Access (WCDMA) as the air interface standard, and High Speed ​​Downlink Packet Access (HSDPA) is an evolved version of the UMTS system. In HSDPA Multiple Input Multiple Output (Multiple Input Multiple Output; hereinafter referred to as MIMO), Hybrid Automatic Repeat Request (Hybrid Automatic Repeat Request; hereinafter referred to as: HARQ), Adaptive Modulation and Coding (Adaptive Modulation and Coding; hereinafter referred to as: AMC) and Technologies such as high-order modulation have greatly improved system performance: the theoretical upper bound of the transmission rate on a 5MHz carrier bandwidth ...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04L25/02H04W88/02
CPCH04W72/542
Inventor 王宗杰徐飞邱玲
Owner HUAWEI TECH CO LTD
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