Distributed user association method for guaranteeing user mobility and time delay requirement

Abstract

The invention discloses a distributed user association method for guaranteeing user mobility and a time delay requirement, and belongs to the technical field of wireless communication. The invention provides a distributed user association method for solving the problem that the user experience quality is reduced due to connection interruption caused by user movement and large satellite-to-earth link propagation time delay in a satellite-earth fusion network. The method comprises establishing a user base station initial association set according to a base station coverage range, and dividing different associable base station subsets according to user mobility and user time delay requirements; based on the obtained base station association subsets, setting a signal-to-noise ratio threshold value according to the rain-snow-caused attenuation degree of the satellite-to-earth link, achieving the user transmission rate and maximization by using a distributed maximum demand algorithm under the limitation of the satellite return capacity, and achieving load balancing between the base stations using a matching algorithm under the condition that the minimum rate demand of the user is met. Through the provided distributed user association method, the data transmission rate is improved, the user experience is guaranteed, and the load balance between the base stations is realized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication. Specifically, it relates to a distributed user association method that guarantees user mobility and time delay requirements. Background technique [0002] In recent years, with the enhancement of the capabilities of smart terminals, the traffic and service demands generated by users have grown exponentially. This massive data growth and high-quality service demands have placed higher and higher requirements on traditional wireless access networks. . On the one hand, single-point infrastructure needs to be able to provide greater communication capacity to carry more users, and on the other hand, it is required to expand multi-point coverage to meet users' consistent communication service needs anytime, anywhere. Compared with traditional communication methods, satellite networks can provide global communication coverage and efficient broadcasting services without being restricted ...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes a distributed user association method that guarantees user mobility and delay requirements. In the satellite-ground fusion network, user movement brings connection interruption, large satellite-ground link propagation delay, and satellite-ground link instability. To solve the problem of degradation of user experience quality, divide different associable base station sets according to user mobility and user delay requirements, and set the signal-to-noise ratio threshold according to the attenuation degree of satellite-ground links by rain and snow. Under the limitation of backhaul capacity, the distributed user association method adopts the distributed maximum demand algorithm to realize the maximum user transmission rate sum; under the condition of meeting the user's minimum rate demand, the distributed user association method using the matching algorithm realizes load balancing between base stations

Images