Interference suppressing method in wireless communication system

Abstract

The invention provides a method for restraining the interference in a wireless communication system. According to the business and the user characteristic, a plurality of cells in the system are divided into a plurality of cell clusters; each cell cluster utilizes the same time-frequency resource distributing method, different cell clusters utilize different time-frequency resource distributing methods; and the interference suppression between different cells and different cell clusters is realized by flexibly dividing and adjusting the time-frequency two-dimension resource in order to respond to the change in the load in the cell, thereby effectively avoiding the interference between cells. On the basis of dividing the special resource for coordinating the interference for an edge user of the cell, the method utilizes an intensified or discrete dividing method to divide the shared resource in order to realize the flexible response to the change in the load of the cell and the interference suppression between cells, improves the flexibility of the system to respond to the change in the load of the cell and the system efficiency, saves the network investment and improves the flexibility of the network design.

Description

technical field [0001] The present invention relates to a method for suppressing interference in a wireless communication system, to be more precise, relates to a method for suppressing interference between network cells by dividing and adjusting resources in a wireless communication system, and belongs to wireless network communication technology field. Background technique [0002] The 3GPP organization launched the Long Term Evolution (LTE) in 2004 to realize the transition from 3G technology to 4G technology. The overall goal of the program is to be able to provide higher data rates, lower latency and greater system capacity at lower cost. The downlink of the 3GPP LTE system uses Orthogonal Frequency Division Multiple Access (OFDMA), and the uplink uses Single Carrier Frequency Division Multiple Access (SC-FDMA) based on Orthogonal Frequency Division Multiplexing (OFDM) transmission technology. At present, in a single cell of the LTE system, the orthogonality between t...

AI Technical Summary

Problems solved by technology

However, interference elimination requires the user to obtain detailed information about the interfering cell signal, such as the coding and modulation mode and coding rate of the interfering signal. However, sending the detailed information about the interfering signal to the user consumes system resources and increases the burden on the system.

[0005] Therefore, according to the advantages and disadvantages of the two methods of interference coordination and interference cancellation, a better effect of interference suppression cannot be achieved by only using any one of the interference suppression methods, and the system cannot allocate resources according to the specific real-time load conditions of each cell. The transmission resources of the system cannot be reasonably arranged, and the overall performance improvement of the system is also limited

Images