Method and device for coordinating downlink interference of long term evolution system

Abstract

The invention discloses a method and a device for coordinating the downlink interference of a long term evolution (LTE) system. The method comprises the following steps of: acquiring the quantity demand of a high-power-frequency-band physical resource block (PRB) of a cell group; dynamically setting the high-power-frequency-band PRB of adjacent cells according to the acquired quantity demand of the high-power-frequency-band PRB and pre-configured static high-power-frequency-band PRB of the cell group; and coordinating downlink power, load or switching of an edge user of the current cell according to the quantity demand of the high-power-frequency-band PRB of the cell group, the high-power-frequency-band PRB which is required by normal running of a system, the dynamically set high-power-frequency-band PRB of the current cell, the static high-power-frequency-band PRB which is distributed to the current cell in advance, and the load balancing degree of the edge user of the current cell and the edge user of the adjacent cell. By the method and the device, the downlink interference can be reduced, the adjusting frequency of the high-power-frequency-band PRB can be reduced and the stability of an LTE system can be improved.

Description

technical field [0001] The present invention relates to Long Term Evolved (LTE, Long Term Evolved) technology, in particular to a method and device for coordinating downlink interference of a Long Term Evolution system. Background technique [0002] LTE technology is an evolution technology of 3G, which improves and enhances the air access technology of 3G, adopts the same frequency networking, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology and multiple input and multiple output (MIMO, Multi-Input and Multi-Output) technology as its wireless network technology. In the LTE system, due to the use of the same frequency network, the edge users between adjacent cells suffer relatively large interference. At the same time, because the distance between the edge users and the base station is relatively long, the signal energy experiences relatively large fluctuations in the wireless channel. Attenuation, the useful signal st...

AI Technical Summary

Problems solved by technology

[0024] It can be seen from the above that the existing method of coordinating the high-power frequency band in the LTE system to avoid downlink interference reduces inter-cell interference by dynamically changing the number of PRBs in the high-power frequency band. Bit rate (GBR, Guaranteed Bit Rate) business, there are also non-GBR (Non-GBR) business with data burst, so this method will cause frequent adjustment of high-power frequency band PRB, thereby affecting the stability of the system; Furthermore, if the high-power frequency band of the current cell is completely or partially staggered from the high-power frequency band of the adjacent cell, if it is partially staggered, it will still cause large downlink interference, making the performance of the LTE system poor

Images