面向卫星编队飞行的有线无线时隙融合调度方案研究

邢媛; 徐川; 纪伟星; 赵国锋; 程克非

doi:10.11999/JEIT220916

面向卫星编队飞行的有线无线时隙融合调度方案研究

doi: 10.11999/JEIT220916

1.
重庆邮电大学通信与信息工程学院重庆 400065
2.
重庆邮电大学网络空间安全与信息法学院重庆 400065

基金项目: 国家自然科学基金(62171070)，重庆市研究生科研创新项目(CYB19176)，重庆邮电大学博士研究生人才培养项目(BYJS201905)，重庆市博士后科学基金(CSTB2022NSCQ-BHX0043)

详细信息

作者简介:
邢媛：女，博士生，研究方向为天地一体化网络、时间敏感网络

徐川：男，博士，教授，研究方向为时间敏感网络、天地一体化网络、工业互联网

纪伟星：男，硕士生，研究方向为时间敏感网络

赵国锋：男，博士，教授，研究方向为时间敏感网络、工业互联网、天地一体化网络、网络测量

程克非：男，博士，教授，研究方向为网络空间安全、网络攻击与防御

通讯作者:
徐川　xuchuan@cqupt.edu.cn

中图分类号: TN927;TP393
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- 被引次数: 0
出版历程
- 收稿日期: 2022-07-06
- 修回日期: 2023-03-08
- 网络出版日期: 2023-03-13
- 刊出日期: 2023-12-26

Research on Wired and Wireless Time Slots Converged Scheduling Scheme for Satellite Formation Flying

1.
School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
2.
School of Cyber Security and Information Law, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Natural Science Foundation of China (62171070), Chongqing Postgraduate Research and Innovation Project (CYB19176), Chongqing University of Posts and Telecommunications Ph.D. Postgraduate Talent Cultivation Project (BYJS201905), Chongqing Post-Doctoral Science Fund Project (CSTB2022NSCQ-BHX0043)

摘要

摘要: 针对卫星编队飞行场景中星内有线和星间无线链路传输速率以及调度机制的差异性引起的时敏任务在星上转发时延不确定性的问题，该文提出一种有线无线融合的时隙调度方案。首先，分别构建星间无线链路传输速率、星间无线调度以及星内有线调度模型；其次，联合有线和无线链路传输速率以及二者时隙位置关系，建立有线无线融合调度与星上转发时延关联分析模型；最后，为确保时敏业务每次在星上传输的时延稳定性，在时延分析模型基础上以抖动最小为融合调度优化目标，并采用遗传禁忌搜索算法进行求解。仿真结果表明，相比于非融合调度方案，所提融合调度方案的抖动不高于40 μs，转发时延平均降低了20%。
- 卫星编队飞行 /
- 时敏任务 /
- 有线无线融合调度 /
- 时延稳定性
Abstract: Considering the uncertainty of the forwarding delay of time sensitive missions on the satellite caused by the difference of the transmission rate and scheduling mechanism between the intra-satellite wired and inter-satellite wireless link in the satellite formation flying scenario, a wired and wireless converged time slot scheduling scheme is proposed. Firstly, the inter-satellite wireless link transmission rate, inter-satellite wireless scheduling and intra-satellite wired scheduling are constructed respectively. Secondly, the forwarding delay analysis model of the wired and wireless converged scheduling on the satellite is established by considering the transmission rate and the time slot position relationship between the wired and wireless link. Finally, to ensure the stability of delay when the time sensitive traffic is transmitted on the satellite each time, the converged scheduling optimization goal with the minimum jitter is constructed based on the delay analysis model, and the genetic tabu search algorithm is introduced to solve the problem. Simulation results indicate that, compared with the non-converged scheduling scheme, the jitter of the proposed converged scheduling scheme is not higher than 40 μs, and the forwarding delay is reduced by an average of 20%.
- Satellite formation flying /
- Time sensitive missions /
- Wired and wireless converged scheduling /
- Stability of delay

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图 1 有线无线融合调度研究思路

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图 2 TDMA周期H与子周期T_i关系

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图 3 基于有线无线融合调度的转发时延构成

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图 4 有线无线融合的卫星编队飞行仿真场景

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图 5 时敏业务的平均抖动

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图 6 时敏业务的平均转发时延

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算法1　基于遗传禁忌搜索的融合调度算法(GTS-CSA)
输入：所有流f_i的5元组信息，卫星编队拓扑信息，迭代次数Q
输出：平均抖动，有线时隙调度集合O，无线时隙调度集合R
(1) 计算TDMA超帧长度H=lcm{T₁, T₂,···,T_N}；
(2) 计算流f_i在一个TDMA超帧内的子周期数目M_i；
(3) 计算流f_i在第m个子周期内需要的时隙个数s_i,m；
(4) 按照转发时延要求由高到低对流f_i进行排序；
(5) FOR EACH ${{\boldsymbol{f}}_i} \in F$ DO
(6) 　采用贪婪算法计算初始解；
(7) WHILE q ≤Q DO
(8) 　锦标赛选择算法；
(9) 　两点交叉算法；
(10) 基于禁忌搜索的变异算法；
(11) q=q+1；
(12) END WHILE
(13) END FOR

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表 1 仿真参数设置

参数	值
编队中卫星的数目	10颗
卫星轨道高度	900 km
平均SNR	22.4 dB
每颗卫星内部终端数目	5～8台
时敏业务流数目	1～20条
有线链路传输速率	100 Mbit/s
无线链路传输速率	10～15 Mbit/s
单位无线时隙长度	500 μs
时敏业务发送周期取值范围	8～60 ms
时敏业务数据量大小取值范围	1～12 kbit
非时敏业务数据量大小取值范围	1～20 Mbit

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