Feedback method and related user equipment in hybrid coordinated multipoint transmission system

A user equipment, multi-point transmission technology, applied in transmission systems, radio transmission systems, diversity/multi-antenna systems, etc., can solve problems such as system performance degradation, and achieve the effect of overcoming the problem of phase ambiguity

Inactive Publication Date: 2018-03-13
SHANGHAI JIAO TONG UNIV +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the use of traditional quantization feedback techniques in CoMP systems may lead to signal cancellation when user equipment receives signals transmitted by multiple wireless transceiver stations, resulting in system performance degradation

Method used

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  • Feedback method and related user equipment in hybrid coordinated multipoint transmission system
  • Feedback method and related user equipment in hybrid coordinated multipoint transmission system
  • Feedback method and related user equipment in hybrid coordinated multipoint transmission system

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Embodiment Construction

[0030] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and unnecessary details and functions for the present invention will be omitted during the description to avoid confusing the understanding of the present invention.

[0031] figure 1 A schematic diagram of a hybrid CoMP system to which the feedback method according to the present invention can be applied is shown. As shown in the figure, the coverage areas of cells 1 and 3 fall within the coverage area of ​​cell 2 , and user k is located within the coverage area of ​​cell 1 and thus also within the coverage area of ​​cell 2 . For user k, the cooperation mode between wireless transceiver stations providing wireless coverage for cells 1 and 3 is CS / CB, and the cooperation mode between wireless transceiver stations in cells 1 and 2 is JT. The number of transmitting antennas of the wireless transceiver station is M, the number of receiving ante...

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Abstract

The present invention discloses a feedback method performed by user equipment in a hybrid CoMP system and related user equipment. The method includes: receiving reference signals from multiple wireless transceiver stations; performing channel estimation based on the received reference signals to obtain quantized channel direction information of channels between the user equipment and each wireless transceiver station; The channel direction information is fed back to each wireless transceiver station; receive dedicated orthogonal reference signals or control signaling from multiple wireless transceiver stations; perform channel estimation based on the received dedicated orthogonal reference signals or control signaling, and obtain from the implementation of the joint Transmitting quantized phase difference information between signals of the wireless transceiver stations of JT; and feeding back the quantized phase difference information to a reference wireless transceiver station in the wireless transceiver stations. The present invention also discloses a communication method performed by a reference wireless transceiver station in a hybrid CoMP system and a related wireless transceiver station used in combination with the feedback method.

Description

technical field [0001] The present invention relates to the technical field of wireless communication coordinated multi-point transmission (CoMP), in particular to a feedback method performed by a user equipment in a hybrid CoMP system and related user equipment, and also to a reference method used in combination with the feedback method in a hybrid CoMP system A communication method performed by a wireless transceiver station and an associated wireless transceiver station. Background technique [0002] Coordinated multi-point transmission (CoMP) is proposed around the goal of IMT Advanced, through various multi-point cooperation methods such as cooperation between different radio access points (RRUs) in the cell, cooperation between the cell and other relays, and inter-cell cooperation, etc., to reduce the number of cells. Technical measures for edge interference, improving cell edge spectrum efficiency, and increasing effective coverage. [0003] CoMP technology can regar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/0456H04B7/026H04B7/024H04B7/08
Inventor 邓晶丁铭张萌罗汉文戎平唐海龙
Owner SHANGHAI JIAO TONG UNIV
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