User scheduling method and apparatus, system and base station in TDD system

Abstract

The invention relates to the technical field of communication, and especially relates to a user scheduling method and apparatus, a system and a base station in a TDD system. The method comprises the following steps: setting a co-frequency full-duplex scheduling period, wherein the scheduling period includes N subframes; determining K subframes to serve as co-frequency full-duplex subframes from the N subframes, the number K of the co-frequency full-duplex subframes being associated with the specific value of uplink business demand quantity and downlink business demand quantity; and for the co-frequency full-duplex subframes, first scheduling data of uplink users, and based on the estimated interference conditions, determining downlink users matched with the uplink users and scheduling data of downlink users. For the co-frequency full-duplex subframes, the data of the uplink users is firstly scheduled, and then based on the estimated signal interference conditions, the downlink users, of which the interference degree is low, is determined to be the downlink users matched with the uplink users and the data of the downlink users is scheduled, thereby avoiding the interference between the uplink and downlink users, realizing co-frequency full-duplex transmission, and improving the communication efficiency of a system.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a TDD system user scheduling method, device, system and base station. Background technique [0002] TDD (Time Division Duplexing, time division dual In this way, a wireless subframe is divided into 10 subframes, which are used as downlink subframes or uplink subframes, and asymmetric uplink and downlink services are matched by configuring different numbers of downlink subframes and uplink subframes. [0003] With the rapid growth of mobile Internet traffic, the capacity and coverage problems of TDD systems have become increasingly prominent, and it is urgent to improve the spectrum efficiency of TDD systems to enhance network capacity. In this context, low-power high-density cells (such as pico base stations) are introduced in the new generation of communication systems to indicate the amount of frequency reuse, and the same-frequency full-duplex technology based ...

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Problems solved by technology

[0005] However, the inventor found in the process of realizing the present invention that at least the following problems exist in the method provided by the prior art: for two users who transmit in full-duplex at the same frequency as the base station, one sends an uplink signal and the other receives a downlink signal. Interference is caused to the downlink signal received by another user. If the interference cannot be avoided or eliminated, it will cause another user to fail to receive downlink data

Since the existing multi-user scheduling mechanism cannot estimate the interference between two users, it cannot achieve full-duplex transmission on the same frequency, and the communication efficiency is low

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