Method and apparatus reducing interference between adjacent cells

Abstract

The invention discloses a method of reducing interference among adjacent cells. The method comprises the following steps: a wireless resource management entity transmits the information of resources occupied by a cell, which is adjacent to the cell where user equipment is located and belongs to SFN service area, to the user equipment; the information comprises a frequency point, a time slot, and a training serial code and/or an interference code used by the occupied time slot; when receiving operation data, the user equipment, according to the received and saved resource information, determines an adjacent cell which occupies the same frequency point and the same time slot as the user equipment, and the time slot of which uses a different training serial code or a different interference code; and according to the determined training serial code and interference code used during the time slot of the adjacent cell and by using a multi-cells joint detecting method, the same-frequency interference caused by the adjacent cell is reduced or eliminated. The invention further discloses a wireless resource management entity and the user equipment. By using the method and the equipment, the interference from the adjacent cell can be reduced or even eliminated without increasing the complexity of resource allocation and without wasting resources.

Description

technical field [0001] The invention relates to single frequency network broadcasting technology, in particular to a method and device for reducing interference of adjacent cells in single frequency network. Background technique [0002] When using Single Frequency Network (SFN, Single Frequency Network) technology to transmit broadcast services, it is required that the broadcast services transmitted on the same frequency point and the same time slot resource must satisfy content synchronization, that is, the same wireless signal must be transmitted at the same time, otherwise it will cause co-channel interference. [0003] Currently, there are three situations in which co-channel interference occurs: [0004] The first one is: when the same SFN service area includes areas managed by multiple radio resource management entities, for user equipment in adjacent cells managed by different radio resource management entities, the same frequency point and time slot transmit the sa...

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Problems solved by technology

[0005] The second is: when user equipments in adjacent cells in different SFN service areas occupy the same frequency point and time slot to transmit broadcast services, since the content of broadcast services transmitted in different SFN service areas is different, adjacent cells cannot implement The content is synchronized, causing co-channel interference with each other

[0007] In order to avoid the above three kinds of co-channel interference, one method is to establish a certain interval between adjacent cells that are determined to have co-frequency interference. This method can reduce the interference between adjacent cells in the above three cases to a certain extent. co-channel interference, but because the separation area is unavailable, resources are wasted

[0008] Another method is: during resource allocation, avoid allocating the same frequency and time slot to adjacent cells with co-frequency interference, but this method makes the resource allocation process complicated and reduces resource utilization

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