Method and mobile communication network for adjusting transmission power of mobile station

Abstract

The invention discloses a method and a mobile communication network for adjusting the transmission power of a mobile station. The method comprises the following steps that: each base station respectively measures uplink performance indexes of the base station and transmits the measure values of the uplink performance indexes of the base station to adjacent base stations through a backbone network; each base station respectively adjusts partial power control factors of the base station according to the received uplink performance indexes of the adjacent base stations and transmits the adjusted partial power control factors to each mobile station under the control of the base station through broadcast messages; and each mobile station respectively adjusts the transmission power of the mobile station according to the partial power control factors. The method adjusts the transmission power of the mobile station through partial power control technology, can reduce the disturbance of an uplink, further improve the performance of cell edge users, and greatly improve the throughput of a system sector particularly in a honeycomb wireless communication system of low-frequency multiplex factors. The optimized proposal performs compensation on the path loss and the shadow fading.

Description

technical field [0001] The invention relates to the field of mobile communication, in particular to a method for adjusting transmission power of a mobile station and a mobile communication network. Background technique [0002] Next-generation mobile communication systems such as LTE (3GPP Long Term Evolution, 3GPP Long Term Evolution), UMB (Ultra Mobile Broadband, Ultra Mobile Broadband) and mobile WiMAX (Worldwide Interoperability for Microwave Access, namely Worldwide Interoperability for Microwave Access) are mainly based on OFDMA (Orthogonal Frequency Division Multiple Access) multiple access method, under a given system bandwidth, from the perspective of the frequency domain, different users achieve the purpose of multiple access by occupying a certain number of orthogonal subcarrier resources . [0003] For broadband wireless access systems based on OFDMA multiple access, when the frequency reuse factor is relatively low, especially when adjacent cells use the same c...

AI Technical Summary

Problems solved by technology

[0003] For broadband wireless access systems based on OFDMA multiple access, when the frequency reuse factor is relatively low, especially when adjacent cells use the same carrier frequency, the adjacent cells may use the same subcarrier resources, resulting in Inter-cell interference is very serious

Due to the existence of inter-cell interference, the performance of cell-edge users suffers from great fading, resulting in capacity mainly limited by inter-cell interference

For the uplink, due to the existence of uplink interference, in order to make the uplink signal quality of a single user reach the predetermined target, it is necessary to increase the transmit power of the mobile station, resulting in an increase in the power consumption of the mobile station; another On the one hand, due to the increase of the transmission power of the mobile station and the increase of its interference to other users, the IOT (Interference over Thermal, interference over thermal noise) of the base station receiver increases

Generally, techniques for reducing inter-cell interference based on OFDMA multiple access methods mainly include partial frequency multiplexing, soft frequency multiplexing, inter-cell scrambling and other technologies, but only using the above-mentioned technologies cannot completely solve the problem of uplink interference. New approaches to address uplink interference need to be introduced to improve performance for cell edge users

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