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Method, device and system for inter-cell interference coordination (ICIC)

A technology of inter-cell interference and coordination method, applied in the directions of orthogonal multiplexing system, diversity/multi-antenna system, space transmit diversity, etc., can solve inter-cell interference, high transmit power, and user throughput at the edge of inter-cell interference The improvement of cell performance and system performance is limited, and the effect of reducing inter-cell interference, increasing resource utilization, and improving throughput

Active Publication Date: 2011-04-13
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a multi-antenna system, the resources available for coordination include time, frequency, space, and power. Only the RNTP parameters are transmitted, and the resources available for coordination cannot be fully utilized, which reduces inter-cell interference, improves edge user throughput, and Very limited improvement in cell performance and system performance
In addition, when the system load is high, the edge UEs of adjacent cells may use the same PRB, and the transmit power is high, and interference coordination cannot be performed, resulting in large inter-cell interference, which seriously reduces system performance and cell edge throughput. quantity

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  • Method, device and system for inter-cell interference coordination (ICIC)

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Embodiment Construction

[0036] In the technical solutions proposed by the embodiments of the present invention, the downlink ICIC also exchanges space information in addition to power information. The spatial information to be exchanged may be the spatial information of the serving cell or the spatial information of the target cell. Specifically, the spatial information is based on PRBs, and may be at least one of the following: the PMI (Precoding Matrix Index, precoding matrix indicator) selected by the serving cell, the best channel matching with the UE in the serving cell, and the The PMI of the target cell with the greatest UE interference, that is, the WPMI (worst PMI, worst precoding matrix indicator) of the UE in the serving cell relative to the target cell, the worst channel matching with the UE in the serving cell and the least interference to the UE The PMI of the target cell, that is, the BPMI (best PMI, best precoding matrix indicator) of the UE in the serving cell relative to the target ...

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Abstract

The embodiment of the invention discloses a method, device and system for inter-cell interference coordination (ICIC). The method comprises the following steps of: receiving an ICIC signaling from a service cell by a target cell, wherein the ICIC signaling carries space information; and carrying out ICIC by the target cell according to the space information carried in the ICIC signaling. The embodiment of the invention can further reduce the inter-cell interference and improve the cell property.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to an inter-cell interference coordination method, device and system. Background technique [0002] In an LTE (Long Term Evolution, long-term evolution) system, since downlink transmission adopts OFDM (Orthogonal Frequency Division Multiplexing) technology, inter-cell interference becomes a main interference mode. Unlike the CDMA (Code Division Multiple Access, Code Division Multiple Access) system that uses soft capacity to implement co-frequency networking, the LTE system cannot directly implement co-frequency networking. Therefore, how to reduce inter-cell interference and realize co-frequency networking has become an LTE A major problem with the system. [0003] At present, the LTE system supports at least the following four inter-cell interference cancellation methods: Beamforming at the transmitter and IRC (Interference Rejection Combining, Interference R...

Claims

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Application Information

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IPC IPC(8): H04W28/18H04W92/20H04B7/06
CPCH04W72/082H04J11/0053H04W72/0426H04W72/27H04W72/541
Inventor 何浩高秋彬彭莹汪颖孙韶辉
Owner DATANG MOBILE COMM EQUIP CO LTD