基于用户群组的低轨卫星网络多星切换策略

doi:10.11959/j.issn.1000-0801.2022078

Abstract

Abstract:

LEO satellite network plays an important role in global communication in the future mobile communication.In large-scale LEO satellite networks, frequent concurrent handoffs by a large number of users will reduce the handover success rate and increase the signaling overhead.In order to solve this problem, a multi satellite handover strategy based on user group for LEO satellite networks was proposed.When triggering the handover, the user will send the candidate handover satellites that meet its own communication needs to the access satellite.The access satellite groups users considered the conditions of user handover success rate, satellite throughput rate and satellite load balancing to complete the whole handover process.A signaling interaction process of handover strategy based on user group was designed, and the signaling overhead of group handover was analyzed.The simulation results show that the multi-satellite handover strategy of LEO satellite network based on user group can effectively reduce the transmission of network repeated signaling and reduce the system signaling overhead.At the same time, it can effectively improve the user handover success rate and satellite throughput, and balance the satellite network load.

Key words: LEO satellite network, user group, multi-satellite handover, multi-objective optimal group strategy

CLC Number:

TN927

Hongtao ZHU, Qing GUO. User group based multi-satellite handover strategy for LEO satellite networks[J]. Telecommunications Science, 2022, 38(4): 39-48.

Figures/Tables 7

References 21

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参数	值
卫星轨道高度/km	550
卫星运行速度/(km·s^-1)	7.48
卫星覆盖半径/km	100
卫星最大可用带宽/MHz	200
卫星覆盖层数	4
单用户需求带宽/MHz	1～5
单位信令传输成本	1
信令开销中有用数据占比	0.5
用户与卫星控制信令大小/byte	52
卫星与地面站控制信令大小/byte	84
仿真区域长度/km	400
仿真区域宽度/km	400
仿真时长/s	50
仿真间隔/s	0.5

User group based multi-satellite handover strategy for LEO satellite networks

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