基于多属性决策的5G低轨卫星网络星间切换方案OA

To address the inter-satellite handover problem in 5G low Earth orbit(LEO)satellite networks,a handover scheme based on multi-attribute decision is proposed.Firstly,an LEO satellite network consisting of multiple satellites and multiple moving ground user equipment(GUE)is considered.The satellite channel is modeled by considering the path loss,the rain attenuation,and the satellite antenna gain.Then,different from conventional single-attribute or three-attribute schemes,four attributes for handover are considered in this scheme,including the received power,the remaining service time,the residual load,and the two-way transmission latency.Subjective and objective weights are set for the four attributes,respectively.The joint weight determination method based on maximizing deviations is used to calculate attribute weights,and the optimal satellite is selected via the Technique for Order Preference by Similarity to an Ideal Solution(TOPSIS).Subsequently,an inter-satellite handover algorithm based on improved entropy weight-TOPSIS is developed.The numerical results show that compared with the traditional single-attribute handover strategies,the proposed inter-satellite handover strategy can reduce the handover frequency and unnecessary handover frequency by 10%.