Method, system and base station for scheduling relay feedback link based on multi-user MIMO (Multiple Input Multiple Output)

Abstract

The invention provides a method, a system and a base station for scheduling a relay feedback link based on the multi-user MIMO (Multiple Input Multiple Output). The scheduling method comprises the following steps of determining a relay station active set of the base station; determining a priority level of each relay station in the relay station active set; and selecting relay stations which can be scheduled on a time-domain resource from the relay station active set according to a determined priority level sequence, and enabling a relativity between two optional relay stations in the selected relay stations which can be scheduled to be less than a relativity threshold value. According to the scheduling method provided by the invention, not only is the priority level of each relay station considered, but also the relativity between the relay stations is considered, thus the flow interference of the system is reduced, and the throughput of a feedback link is increased.

Description

technical field [0001] The present application relates to the field of wireless communication, and more specifically, the present invention relates to a multi-user MIMO (MU-MIMO)-based relay backhaul link scheduling method, system and base station thereof. Background technique [0002] As an emerging technology, relay technology can increase coverage and system capacity, and is regarded as the key technology of the fourth generation mobile communication (4G). The throughput of the relay system backhaul link (eNB-RN) limits the throughput of the entire system to a certain extent, and becomes the bottleneck of the system throughput. This requires the use of appropriate technologies and scheduling solutions in the backhaul (Backhaul) link to increase the capacity of the backhaul link. [0003] Such as figure 1 As shown, through the relay backhaul link scheduling scheme based on multi-user MIMO, the base station (eNodeB) can schedule multiple relay stations (RN1, RN2...) on th...

AI Technical Summary

Problems solved by technology

However, in the scheduling process of the existing scheme, only the priority of the RN is considered, and the correlation between the scheduled RNs is not considered

This may cause greater correlation between RNs scheduled on the same time-frequency resource RB, and correspondingly greater inter-flow interference, which will reduce the receiving signal-to-noise ratio of the RN to a certain extent and increase the risk of data retransmission. possibility, which will affect the capacity of the backhaul link

Images