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Method for restraining intercell interference

A technology for inter-cell interference and inter-cell interference. It is applied to the shaping network, electrical components, transmission system and other directions in the transmitter/receiver. It can solve the problem of difficulty in obtaining channel state information, and reduce the impact of adjacent cell interference. Improve performance and improve data efficiency

Inactive Publication Date: 2010-09-08
TSINGHUA UNIV
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Problems solved by technology

However, under the existing system, the interference signal is unknown, and the channel state information from the interfering base station to the UE is difficult to obtain

Method used

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  • Method for restraining intercell interference
  • Method for restraining intercell interference

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Embodiment Construction

[0048] The heavy-duty vehicle exhaust monitoring system proposed by the present invention is described in detail as follows in conjunction with the accompanying drawings and embodiments.

[0049] The present invention is mainly proposed for the LTE-ADVANCED system, and is also applicable to other transmission systems. It relates to the downlink data time-frequency structure of the LTE-ADVANCED system, and is especially suitable for cell edge users with relatively large interference from adjacent cells. For fully understanding the present invention, it is necessary to carry out following description:

[0050]There are three types of reference signals (pilots) supported by LTE-ADVANCED: Cell-Specific RS, MBSFN Reference Signal (Multicast Broadcast Single Frequency Network RS, multicast / broadcast single frequency network reference signal), user equipment specific Reference signal (UE-Specific RS).

[0051] All downlink subframes that support non-MBSFN transmission need to transm...

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Abstract

The invention relates to a method for restraining intercell interference. In the method, user equipment determines interfered cells and informs an access cell base station according to the reference signal intensity of an adjacent base station in a set period; the access cell base station vacates a time-frequency resource block position corresponding to the reference signals of the interfered cells according to the data transmission condition of the interfered cells and sends data to the user equipment; the user equipment detects the reference signals of the interfered cells and estimates channel state information between an interfered cell base station and the user equipment; and the intercell interference is restrained by adopting an interference restraining algorithm according to the channel state information. By using the method, the channel state information from the interfered base station to the user equipment can be easily obtained under the condition that the interference signal is unknown, thereby the interference restraining algorithm is applied to improve the quality of signals received by the cell edge, reduce the influence of adjacent cell interference, improve the data efficiency of the cell edge and further improve the performance of the system.

Description

technical field [0001] The invention relates to the technical field of communication signal processing, in particular to a method for suppressing inter-cell interference. Background technique [0002] In November 2004, 3GPP passed the project establishment work on UTRA Long Term Evolution (LTE, Long Term Evolution). The goals of LTE are: higher data rate, lower delay, improved system capacity and coverage, and lower cost. LTE adopts a new core transmission technology, that is, OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) technology, so large-scale innovation is required both at the system and terminal levels. [0003] In the LTE system, frequencies used by users in a cell are orthogonal to each other. The cyclic prefix (CP) of each OFDM symbol is generally greater than the multipath delay, so the intersymbol interference (ISI) can be basically eliminated. Subcarriers of different users have guard intervals, so inter-subcarr...

Claims

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Application Information

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IPC IPC(8): H04L25/03H04B1/707
Inventor 李云洲冯伟王京周世东肖利民
Owner TSINGHUA UNIV
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