A method and device for comp transmission

A user equipment, multi-point transmission technology, applied in the direction of electrical components, orthogonal multiplexing systems, multiplexing communication, etc., can solve the problem of reducing CoMP transmission performance, inaccurate link self-adaptation, and affecting CoMP transmission performance and other issues to achieve the effect of improving CoMP transmission performance

Active Publication Date: 2018-03-30
DATANG MOBILE COMM EQUIP CO LTD
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AI Technical Summary

Problems solved by technology

CSI outdated problem can seriously affect CoMP transmission performance
The impact of CSI outdated problem on transmission performance mainly includes three aspects: 1. Inaccurate resource scheduling; 2. Inappropriate selection of precoding matrix; 3. Inaccurate link adaptation
[0012] To sum up, the current central scheduling method for CoMP transmission is designed for ideal backhaul. In the case of non-ideal backhaul, the accuracy of precoding matrix selection and link adaptation is seriously affected due to the long delay of backhaul transmission. , which seriously degrades the CoMP transmission performance

Method used

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  • A method and device for comp transmission
  • A method and device for comp transmission
  • A method and device for comp transmission

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Embodiment Construction

[0034] In the embodiment of the present invention, the target base station performs CoMP transmission for the user equipment according to the CSI of the user equipment from other base stations. Since the precoding matrix selection and link adaptation are performed according to the received CSI of the user equipment sent by the base station managing the user equipment, the received CSI of the user equipment only passes through one backhaul. In the background technology, the target base station selects the precoding matrix and adapts the link according to the information of the CCN, and the information of the CCN is determined according to the CSI reported by other base stations. backhaul. Compared with the background technology, the embodiment of the present invention reduces the delay of information on precoding matrix selection and link adaptation, reduces the impact on the accuracy of precoding matrix selection and link adaptation, and improves CoMP transmission performance ...

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Abstract

Embodiments of the present application relate to the technical field of wireless communications, and in particular, to a method and device for performing CoMP transmission, which are used for solving the problem existing in the prior art that in the case of non-ideal backhaul, due to a large backhaul transmission delay, selection of a precoding matrix and accuracy of link self-adaption are seriously affected, and as a result, the CoMP transmission performance is seriously lowered. The method in the embodiments of the present application comprises: when needing to perform CoMP transmission for a user equipment managed by another base station, a target base station performing CoMP transmission for the user equipment according to CSI of the user equipment sent by the another base station. The embodiments of the present application save the time, shorten the delay, reduce an influence on selection of a precoding matrix and accuracy of link self-adaption, and improve the CoMP transmission performance.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method and equipment for CoMP transmission. Background technique [0002] In the long term evolution-advanced (1ong term evolution-advance: LTE-A) system, in order to reduce the neighbor cell interference of the cell coverage edge user equipment and improve the experience of the cell edge user equipment, the coordinated-multiple-point transmission technology (coordinated-multiple- point: CoMP). The coordinated multi-point transmission technology is cooperation among multiple geographically separated transmission points (transmission point: TP). In order to implement CoMP transmission for a user equipment, the network configures a measurement set for the user equipment, and the measurement set includes one or more base stations. The network configures one or more channel state information (channel state information: CSI) processes for each base station i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/12
CPCH04J11/0053
Inventor 倪浩高秋彬
Owner DATANG MOBILE COMM EQUIP CO LTD
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