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Method, device and system for eliminating interference among cells

A technology of inter-cell interference and cell, which is applied in the field of communication and can solve problems such as user interference and inter-cell interference

Inactive Publication Date: 2009-09-23
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For several users in different cells, if the cells are adjacent and the PRBs allocated to each user are the same, these users may cause interference to each other
[0004] Currently, there is no effective solution to the problem of inter-cell interference caused by the same allocated PRBs for several users in different cells.

Method used

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  • Method, device and system for eliminating interference among cells
  • Method, device and system for eliminating interference among cells
  • Method, device and system for eliminating interference among cells

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Embodiment Construction

[0020] In order to solve the problem of coordinating the allocated PRBs between different cells to avoid interference, the 3GPP standardization organization defines two measurement values, which are provided by the base station, respectively:

[0021] (1) High Interference Indication (HII for short)

[0022] HII lists the PRBs scheduled to the users at the cell edge. Because these PRBs are used at the edge of the cell, it is very likely that they will cause interference to neighboring cells.

[0023] (2) Overload Indicator (OI for short)

[0024] The OI lists the PRBs that have been interfered with in the cell.

[0025] In the embodiment of the present invention, the above-mentioned HII or / and OI will be used to coordinate and allocate PRBs between base stations, so as to eliminate interference between cells.

[0026] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] Since the HII indicates the PR...

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Abstract

The invention discloses a method, a device and a system for eliminating the interference among cellular base stations. The method comprises the following steps that: the cellular base station sends use information of time-frequency resources of a cell to a neighbor cell; and a base station of the neighbor cell preferentially selects the resource which does not conflict with the resource indicated by the use information of the time-frequency resources to allocate to users of the cell according to the use information of the time-frequency resources, wherein the use information of the time-frequency resources comprises HII or / and OI information. By the method, the device and the system, the cellar base station can try best to avoid using the resource which conflicts with the resource indicated by the use information of the time-frequency resources when allocating the time-frequency resources for the users of the cell according to the use information of the time-frequency resources, thereby eliminating the interference among the cells.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method, device and system for eliminating interference between cellular cells. Background technique [0002] In a cellular network based on Orthogonal Frequency Division Multiplex (OFDM for short) wireless technology, data transmission is implemented by assigning physical resource blocks (PRBs) by base stations. Resource Blocks (PRBs) are distinguished from each other by a specific "band-time" combination. [0003] Each cell has a limited number of resource blocks (PRBs). If different users in the same cell use the same PRB to transmit data, mutual interference will be caused. In this case, the coordination of the PRB is implemented by the base station itself. However, for several users in different cells, if the cells are adjacent and the PRBs allocated to each user are the same, these users may cause interference to each other. [0004] At present, there is no effective ...

Claims

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Application Information

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IPC IPC(8): H04W72/08
Inventor 刘磊丁丁邵泽才肖善鹏
Owner CHINA MOBILE COMM GRP CO LTD
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