Improved proportional fairness scheduling algorithm based on multiuser eigenmode transmission (MET) precoding technology

Abstract

The invention discloses an improved proportional fairness scheduling algorithm based on a multiuser eigenmode transmission (MET) precoding technology in a multiuser multiple input multiple output (MU-MIMO) wireless communication system. The improved proportional fairness scheduling algorithm comprises the following steps: (1) receiving service requests of users and channel state information and then initializing average transmission rates of the users, average request rate and a service user set, by a base station; (2) updating the average request rate of each user and selecting a user of the highest priority level to constitute a first user of the service user set; (3) selecting the user of the highest priority level each time by the base station by using a greedy algorithm to constitute the service user set; and (4) after the users capable of being served by a system are selected, updating the average transmission rate of each user to a next round of user scheduling. The improved proportional fairness scheduling algorithm disclosed by the invention can be used for increasing the fairness of users with different channel conditions in the system on the basis of ensuring the superiority that the MET precoding technology can be used for obviously increasing system capacity, so that a favorable compromise is achieved between the system capacity and the user fairness.

Description

technical field [0001] The present invention relates to a multi-user scheduling technology and a multi-user eigenmode (MET) precoding technology in a multiple-input multiple-output (MIMO) communication system in wireless communication technology, and more specifically, relates to a multi-user eigenmode (MET) based An improved multi-user proportional fair scheduling method based on MET) precoding technology. Background technique [0002] Multiple Input Multiple Output (MIMO) technology is one of the core technologies of wireless communication B3G. By installing multiple transmitting and receiving antennas at the base station and the user end, it increases the degree of spatial freedom for the mobile communication system, and provides space multiplexing gain and space diversity gain to improve system throughput. [0003] Precoding technology can well solve the problem of signal interference between users in a point-to-multipoint communication system. It realizes the parallel ...

AI Technical Summary

Problems solved by technology

However, this combination, while improving system fairness, loses too much throughput, and cannot make good use of the superiority of MET precoding technology in improving system throughput. Therefore, it is necessary to provide an improved Multi-user proportional fairness method, which can achieve a better compromise between system throughput and fairness when combined with MET precoding technology

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