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Limited feedback method in multi-point coordinated transmission scenario and system

A multi-point collaboration and scene technology, applied in the field of limited feedback methods and systems, can solve the problems of reducing the amount of feedback in the CoMP system, and achieve a reasonable and efficient feedback mechanism, fairness suppression, and the effect of reducing the amount of feedback information

Inactive Publication Date: 2012-08-01
BEIJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a limited feedback method and system in a coordinated multi-point transmission scenario to solve the technical problem of how to reduce the amount of uplink feedback in a CoMP system

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  • Limited feedback method in multi-point coordinated transmission scenario and system
  • Limited feedback method in multi-point coordinated transmission scenario and system
  • Limited feedback method in multi-point coordinated transmission scenario and system

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Embodiment Construction

[0034] In order to make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined arbitrarily with each other.

[0035] The following concepts are involved in the present invention:

[0036] Cooperating area: A collection of cells that directly or indirectly participate in user data transmission, including serving cells and cooperating cells.

[0037] Serving cell: refers to a cell that directly sends data information and control information to users, and the base station of this cell is the serving base station.

[0038] Cooperative cell: refers to a cell that indirectly participates in coordinated transmission. The so-called indirect participation means that the cell does not transmi...

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Abstract

The invention discloses a limited feedback method in a multi-point coordinated transmission scenario and a system. The method includes dividing districts in a coordinated region of a multi-point coordinated [CoMP (coordinated multi-point)] system into two categories; selecting one district and defining the district as a main district, calling other districts as auxiliary districts, and determining the main district in a polling manner; adopting different feedback mechanisms for users in the districts divided into the two categories; and realizing information feedback only for the users with normalized signal to interference plus noise ratios (SINR) higher than a feedback threshold in the main district, and realizing information feedback only for the users with grades of interference, to the feedback users in the main district, lower than a given value in the auxiliary districts. By the aid of the limited feedback method and the system in the technical scheme, the quantity of the feedback information to the users can be effectively reduced on the premise of guaranteeing fairness among the users and suppressing same-frequency interference.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a limited feedback method and system in a coordinated multi-point transmission scenario. Background technique [0002] In order to expand the service range and effectively improve the performance of cell edge users, 3GPP has introduced a coordinated multi-point transmission and reception (Coordinated Multi-Point, CoMP) technology in LTE-Advanced. The multi-points for cooperative transmission in CoMP may be multiple base stations, multiple relay nodes, and multiple home gateways. Generally, the CoMP technology is studied by taking base station cooperation of multiple cells as an example. According to the direction of data transmission, CoMP technology can be divided into uplink CoMP and downlink COMP, and downlink CoMP can be further divided into two categories: [0003] Joint Transmission (JP): The user's data information is shared among the base stations in the cooper...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L5/00H04B7/06
Inventor 张天魁冯春燕宁伟东黄蓉
Owner BEIJING UNIV OF POSTS & TELECOMM
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