Method for converting downlink signal from repeater and its equipment

Abstract

This invention discloses a method for transferring downlink signal by relay stations, which gets the down link quality between the mobile station and the relay stations to determine the relay set for transferring down signals based on the difference of the qualities, when the set includes multiple relay stations, it carries out empty time coding to the down signals by the relay stations in the set to be transferred to the mobile station. This invention also discloses a method for transferring down signal by relay stations including setting multiple relay stations for transferring down signals, getting the down link qualities between the mobile station and relay stations, determining relay station sets for transferring down signals according to the qualities of the relay stations and number of the relay stations, carrying out empty time coding by the stations in the set and transferring it to the mobile station.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a method and equipment for a relay station to forward downlink signals. Background technique [0002] In a wireless communication system, due to reasons such as path attenuation of electromagnetic waves or building occlusion, some places become areas with low wireless communication signal strength, and the communication quality of mobile terminals located in these areas will become very poor. In order to solve the above problems, it is usually necessary to use a relay station to enhance the wireless communication signal between the base station and the mobile station. There are two main types of wireless communication system structures including relay stations: coverage-enhanced scenarios and rate-enhanced scenarios. [0003] Please refer to FIG. 1 , which is a schematic diagram of extending the coverage of a base station by a relay station. Mobile station 1 is wit...

AI Technical Summary

Problems solved by technology

[0006] However, when the mobile station (such as mobile station 2 in the figure) is located in the coverage area of ​​multiple relay stations at the same time, if the distance between the relay stations is relatively long, the mobile station It is often located at the edge of each relay station. At this time, no matter which relay station is selected to forward the downlink data, the receiving signal-to-noise ratio of the mobile station will be low due to the large path loss, and the communication rate provided by the relay station is usually Low, cannot well meet the quality of service (QoS) requirements of mobile stations

Images