电信科学 ›› 2023, Vol. 39 ›› Issue (2): 10-24.doi: 10.11959/j.issn.1000-0801.2023030
刘雅琼1,2,3, 吕哲1,2,3, 赵亚飞3, 寿国础1,2,3
修回日期:
2023-02-04
出版日期:
2023-02-20
发布日期:
2023-02-01
作者简介:
刘雅琼(1988- ),女,博士,北京邮电大学信息与通信工程学院副教授,主要研究方向为边缘智能、车联网、卫星通信基金资助:
Yaqiong LIU1,2,3, Zhe LYU1,2,3, Yafei ZHAO3, Guochu SHOU1,2,3
Revised:
2023-02-04
Online:
2023-02-20
Published:
2023-02-01
Supported by:
摘要:
卫星互联网的诞生带来新的发展机遇,同时也具备诸多挑战。主要调研了在空天地一体化的背景下,人工智能(AI)技术作为重要的辅助工具在卫星通信/卫星互联网领域的应用,涉及通信抗干扰、通信路由、星地网络系统架构、星座运营与管理等场景,其中涉及的AI算法包括传统机器学习、深度学习、强化学习等;最后,针对 AI 技术在卫星通信/互联网领域的发展趋势,提出了未来的研究方向,为我国卫星领域的智能化发展提供了思路和技术方案。
中图分类号:
刘雅琼, 吕哲, 赵亚飞, 寿国础. AI技术在卫星通信/互联网领域的应用综述[J]. 电信科学, 2023, 39(2): 10-24.
Yaqiong LIU, Zhe LYU, Yafei ZHAO, Guochu SHOU. A survey on AI techniques applied in the satellite communication/satellite Internet field[J]. Telecommunications Science, 2023, 39(2): 10-24.
表1
AI算法在卫星通信技术方面的应用"
智能化内容/目标 | 使用的AI方法 | 代表性文献 |
实现对卫星通信干扰的自主感知 | 基于DL与干扰感知的AI技术 | 文献[ |
LSTM | ||
针对音频干扰、窄带干扰、扫频干扰及其两两叠加的复合 | RL | 文献[ |
干扰的智能抗干扰决策 | ||
负载均衡最优路径 | 基于集中式SDN的TRPO | 文献[ |
自适应多路径路由发现 | PIMTS | 文献[ |
DDPG | ||
信道资源调度 | 智能水滴算法 | 文献[ |
识别通信信号调制方式 | ResNet50 | 文献[ |
优化自适应编码和调制 | 在线随机回归森林ORRF | 文献[ |
卫星信道中信号失真问题 | RL | 文献[ |
多目标强化和自适应神经网络 | ||
多波束卫星信道分配、功率分配和跳波束算法 | DRL | 文献[ |
6G卫星通信网络 | AI赋能技术 | 文献[ |
多层卫星通信 | 快速天线指向算法 | 文献[ |
智能改进的DRL算法 | ||
低轨卫星物理层认证 | ResNet18 | 文献[ |
计算卸载 | 深度确定性策略梯度方法 | 文献[ |
卫星表面充电通信 | ML | 文献[ |
多波束高吞吐量卫星的动态功率分配 | 遗传算法、模拟退火算法、粒子群优化 | 文献[ |
DRL | ||
降低带宽下行链路成本 | DNN | 文献[ |
表2
AI算法在卫星互联网运维与管理领域方面的应用[51]"
场景 | AI方法 | 优势 |
资源分配等需要考虑用户空间分布的问题 | CNN | 感知二维空间数据 |
预测问题,如用户流量预测、信道质量预测、异常预测 | RNN | 感知时序数据 |
学习卫星间拓扑关系,用户间、卫星与用户间的图关系 | 图神经网络 | 感知图关系 |
对计算效率要求高的场景,如核心网数据流异常检测 | SVM | 模型复杂度低 |
网络运维数据的高维特征降维;网络运行状态异常检测 | 自编码器 | 高维数据降维 |
解决数据样本不足问题或用鉴别器检测异常 | 生成式神经网络 | 生成模型,可应对小样本数据问题 |
动态网络环境中序列决策问题,如资源分配、流量调度 | Q学习、深度Q学习 | 解决无模型环境中的序列决策问题 |
大规模网络中节点分布式控制资源分配、流量调度等 | 多智能体强化学习 | 各智能体独立决策 |
网络中标签训练数据不足的问题 | 迁移学习 | 所需训练样本少 |
[1] | 徐阳 . 卫星通信技术及其展望[J]. 电子技术, 2022,51(7): 258-259. |
XU Y . Study on satellite communication technology and its prospect[J]. Electronic Technology, 2022,51(7): 258-259. | |
[2] | 宋川川, 姚雅雯 . 探讨卫星通信系统在航空领域的应用[J]. 电子测试, 2022(16): 72-73,68. |
SONG C C , YAO Y W . The application of satellite communication system in aviation field is discussed[J]. Electronic Test, 2022(16): 72-73,68. | |
[3] | 武音璇 . 卫星互联网产业发展前景与展望[J]. 张江科技评论, 2022(3): 39-41. |
WU Y X . Development prospect and prospect of satellite Internet industry[J]. Zhangjiang Technology Review, 2022(3): 39-41. | |
[4] | 张聪, 高峰 . 卫星互联网未来应用场景及安全性分析[J]. 信息技术, 2022,46(3): 120-126. |
ZHANG C , GAO F . The future application scenarios and security analysis of satellite Internet[J]. Information Technology, 2022,46(3): 120-126. | |
[5] | 李锋, 韩燕妮, 马晓玲 ,等. 我国低轨卫星互联网发展的问题与对策建议[J]. 全球化, 2022(6): 77-84,134. |
LI F , HAN Y N , MA X L ,et al. Problems and countermeasures for the development of low-orbit satellite Internet in China[J]. Globalization, 2022(6): 77-84,134. | |
[6] | 黄曜明, 姬天相 . 卫星互联网发展趋势和面临挑战分析[C]// 5G网络创新研讨会(2022)论文集. 2022: 474-477. |
HUANG Y M , JI T X . Analysis on the development trend and challenges of satellite internet[C]// Proceedings of 5G Network Innovation Symposium (2022). 2022: 474-477. | |
[7] | 李莉 . 软件定义卫星 智能引领航天[J]. 中国科技奖励, 2019(1): 26-28. |
LI L . Software-defined satellite intelligence leads space flight[J]. China Awards for Science and Technology, 2019(1): 26-28. | |
[8] | 弋耀武, 龚辉, 陈兆源 . 全球卫星导航系统建设发展的启示[J]. 经纬天地, 2022(5): 57-59. |
YI Y W , GONG H , CHEN Z Y . Enlightenment from the construction and development of global satellite navigation system[J]. Survey World, 2022(5): 57-59. | |
[9] | 更智能的卫星:ESA发现项目(ESA Discovery)加速太空中的人工智能[J]. 中国测绘, 2022(6): 78-79. |
Smarter satellites:ESA discovery program to accelerate artificial intelligence in space[J]. China Surveying and Mapping, 2022(6): 78-79. | |
[10] | 虞志刚, 冯旭, 黄照祥 ,等. 通信、网络、计算融合的天地一体化信息网络体系架构研究[J]. 电信科学, 2022,38(4): 11-29. |
YU Z G , FENG X , HUANG Z X ,et al. Research on the architecture of space-ground integrated information network:integration of communication,networking and computing[J]. Telecommunications Science, 2022,38(4): 11-29. | |
[11] | 王文哲, 安岗, 李忻 ,等. 面向空天地一体化场景的5G卫星双模终端需求及应用探讨[J]. 电信科学, 2022,38(S1): 221-230. |
WANG W Z , AN G , LI X ,et al. Discussion of 5G satellite dual-mode terminal requirement and application in the integration communication scenario of satellite and UTRAN[J]. Telecommunications Science, 2022,38(S1): 221-230. | |
[12] | 沈学民, 承楠, 周海波 ,等. 空天地一体化网络技术:探索与展望[J]. 物联网学报, 2020,4(3): 3-19. |
SHEN X M , CHENG N , ZHOU H B ,et al. Space-air-ground integrated networks:review and prospect[J]. Journal on Internet of Things, 2020,4(3): 3-19. | |
[13] | 崔新雨, 伍杰, 周一青 ,等. 空天地一体化融合组网的挑战与关键技术[J]. 西安电子科技大学学报, 2022: 1-11. |
CUI X Y , WU J , ZHOU Y Q ,et al. Challenges and key technologies of air-space integration networking[J]. Journal of Xidian University, 2022: 1-11. | |
[14] | FOURATI F , ALOUINI M S . Artificial intelligence for satellite communication:a review[Z]. 2021. |
[15] | 刘佩璋, 杨博, 刘江春 ,等. 基于深度学习的卫星通信抗干扰方法[J]. 电子测试, 2020(1): 86-87. |
LIU P Z , YANG B , LIU J C ,et al. Interference awareness method based on deep learning for satellite communication[J]. Electronic Test, 2020(1): 86-87. | |
[16] | 孔景娜 . 基于强化学习的卫星通信智能抗干扰决策探讨[J]. 无线互联科技, 2021,18(5): 3-4. |
KONG J N . Research on intelligent anti-interference decision of satellite communication based on reinforcement learning[J]. Wireless Internet Technology, 2021,18(5): 3-4. | |
[17] | 李新桐, 张亚生 . 一种适用于低轨卫星的SDN网络人工智能路由方法[J]. 电子测量技术, 2020,43(22): 109-114. |
LI X T , ZHANG Y S . Artificial intelligence routing method for SDN network suitable for LEO satellites[J]. Electronic Measurement Technology, 2020,43(22): 109-114. | |
[18] | HUANG Y H , JIANG X F , CHEN S W ,et al. Pheromone incentivized intelligent multipath traffic scheduling approach for LEO satellite networks[J]. IEEE Transactions on Wireless Communications, 2022,21(8): 5889-5902. |
[19] | 段超凡, 王锐 . 基于智能水滴算法的卫星信道资源调度研究[J]. 现代计算机, 2022,28(7): 75-78,86. |
DUAN C F , WANG R . Satellite channel allocation based on the intelligent water drops algorithm[J]. Modern Computer, 2022,28(7): 75-78,86. | |
[20] | 杨伟超, 杜宇, 文伟 ,等. 基于多重分形谱智能分析的卫星信号调制识别研究[J]. 电子学报, 2022,50(6): 1336-1343. |
YANG W C , DU Y , WEN W ,et al. Modulation recognition of satellite communication signal based on intelligent analysis of multi-fractal spectrum[J]. Acta Electronica Sinica, 2022,50(6): 1336-1343. | |
[21] | EBERT J , BAILER W , FLAVIO J ,et al. A method for ACM on Q/V-band satellite links based on artificial intelligence[C]// Proceedings of 2020 10th Advanced Satellite Multimedia Systems Conference and the 16th Signal Processing for Space Communications Workshop (ASMS/SPSC). Piscataway:IEEE Press, 2020: 1-5. |
[22] | NGUYEN T M , . Advanced mathematical modeling of machine learning and artificial intelligent addressing satellite transponder distortions[C]// Proceedings of 2020 IEEE Green Energy and Smart Systems Conference (IGESSC). Piscataway:IEEE Press, 2020: 1-6. |
[23] | 韩永锋, 张晨, 张更新 . 基于深度强化学习的卫星动态资源管理研究综述[C]// 第十六届卫星通信学术年会论文集. 2020: 37-43. |
HAN Y F , ZHANG C , ZHANG G X . A review of satellite dynamic resource management based on deep reinforcement learning[C]// Proceedings of the 16th Annual Conference on Satellite Communications. 2020: 37-43. | |
[24] | 吴晓文, 焦侦丰, 凌翔 ,等. 面向6G的卫星通信网络架构展望[J]. 电信科学, 2021,37(7): 1-14. |
WU X W , JIAO Z F , LING X ,et al. Outlook on satellite communications network architecture for 6G[J]. Telecommunications Science, 2021,37(7): 1-14. | |
[25] | XIAO W J , WANG R , SONG J ,et al. AI-based satellite ground communication system with intelligent antenna pointing[C]// Proceedings of GLOBECOM 2020 - 2020 IEEE Global Communications Conference. Piscataway:IEEE Press, 2021: 1-6. |
[26] | OLIGERI G , SCIANCALEPORE S , RAPONI S ,et al. PAST-AI:physical-layer authentication of satellite transmitters via deep learning[J]. IEEE Transactions on Information Forensics and Security, 2022,18: 274-289. |
[27] | STHAPIT S , LAKSHMINARAYANA S , HE L G ,et al. Reinforcement learning for security-aware computation offloading in satellite networks[J]. IEEE Internet of Things Journal, 2022,9(14): 12351-12363. |
[28] | ZHANG S T , . Research on photoelectric effect for artificial satellite communication[C]// Proceedings of 2020 IEEE Intl Conf on Parallel & Distributed Processing with Applications,Big Data & Cloud Computing,Sustainable Computing &Communications,Social Computing & Networking (IS PA/BDCloud/SocialCom/SustainCom). Piscataway:IEEE Press, 2021: 1465-1469. |
[29] | LUIS J J G , PACHLER N , GUERSTER M ,et al. Artificial intelligence algorithms for power allocation in high throughput satellites:a comparison[C]// Proceedings of 2020 IEEE Aerospace Conference. Piscataway:IEEE Press, 2020: 1-15. |
[30] | FURANO G , MEONI G , DUNNE A ,et al. Towards the use of artificial intelligence on the edge in space systems:challenges and opportunities[J]. IEEE Aerospace and Electronic Systems Magazine, 2020,35(12): 44-56. |
[31] | 岳洋, 倪少杰, 吕志成 ,等. 低轨卫星互联网建模与仿真系统设计[C]// 第三十四届中国仿真大会暨第二十一届亚洲仿真会议论文集. 2022: 376-384. |
YUE Y , NI S J , LYU Z C ,et al. Design of Internet modeling and simulation system for low-orbit satellite[C]// Proceedings of the 34th China Simulation Conference and the 21st Asian Simulation Conference, 2022: 376-384. | |
[32] | 董超颖, 续欣, 刘爱军 ,等. 低轨卫星星座网络路由新方法[J]. 计算机科学, 2020,47(12): 285-290. |
DONG C Y , XU X , LIU A J ,et al. New routing methods of LEO satellite networks[J]. Computer Science, 2020,47(12): 285-290. | |
[33] | 魏琳慧, 刘国文, 刘雨 ,等. 基于深度强化学习的卫星互联网路由优化研究[J]. 天地一体化信息网络, 2022,3(3): 65-71. |
WEI L H , LIU G W , LIU Y ,et al. Research on routing optimization in satellite Internet based on deep reinforcement learning[J]. Space-Integrated-Ground Information Networks, 2022,3(3): 65-71. | |
[34] | WANG F , JIANG D D , WANG Z H ,et al. Fuzzy-CNN based multi-task routing for integrated satellite-terrestrial networks[J]. IEEE Transactions on Vehicular Technology, 2022,71(2): 1913-1926. |
[35] | CURZI G , MODENINI D , TORTORA P . Large constellations of small satellites:a survey of near future challenges and missions[J]. Aerospace, 2020,7(9): 133. |
[36] | 罗泽耀 . 天地一体化网络下基于机器学习的路由技术研究[D]. 成都:电子科技大学, 2021. |
LUO Z Y . Research of routing technology based on machine learning in integrated satellite-terrestrial information network[D]. Chengdu:University of Electronic Science and Technology of China, 2021. | |
[37] | 高新洲 . 基于智能优化算法的卫星任务规划问题研究[D]. 哈尔滨:哈尔滨工业大学, 2021. |
GAO X Z . Satellite mission planning based on intelligent optimization algorithms[D]. Harbin:Harbin Institute of Technology, 2021. | |
[38] | 纪哲, 吴胜, 王文博 . 面向卫星互联网的层级化智能部署架构[J]. 天地一体化信息网络, 2022,3(1): 56-61. |
JI Z , WU S , WANG W B . Hierarchical intelligence deployment architecture for satellite Internet[J]. Space-Integrated-Ground Information Networks, 2022,3(1): 56-61. | |
[39] | GAO Z , ZHANG Y Q , SUN W . Artificial intelligence service by satellite networks based on ensemble learning with cloud-edge-end integration[C]// Proceedings of 2022 IEEE/CIC International Conference on Communications in China (ICCC Workshops). Piscataway:IEEE Press, 2022: 158-163. |
[40] | 袁硕, 任奕璟, 王则予 ,等. 软件定义的星地融合智能无线网络[J]. 电信科学, 2021,37(6): 66-77. |
YUAN S , REN Y J , WANG Z Y ,et al. Software defined intelligent satellite-terrestrial integrated wireless network[J]. Telecommunications Science, 2021,37(6): 66-77. | |
[41] | 雷永刚, 张若禹, 马佳楠 . 人工智能技术在卫星任务管控领域的应用[J]. 电讯技术, 2022,62(9): 1377-1382. |
LEI Y G , ZHANG R Y , MA J N . Application of artificial intelligence technology in satellite control system[J]. Telecommunication Engineering, 2022,62(9): 1377-1382. | |
[42] | LIU Q , YANG J , ZHUANG C J ,et al. Artificial intelligence based mobile tracking and antenna pointing in satellite-terrestrial network[C]// Proceedings of IEEE Access. Piscataway:IEEE Press, 2019: 177497-177503. |
[43] | PATRONE F , BACCI G , GALLI A ,et al. Data-driven network orchestrator for 5G satellite-terrestrial integrated networks:the ANChOR project[C]// Proceedings of 2021 IEEE Global Communications Conference (GLOBECOM). Piscataway:IEEE Press, 2022: 1-6. |
[44] | ZHANG J X , ZHANG X , WANG P ,et al. Double-edge intelligent integrated satellite terrestrial networks[J]. China Communications, 2020,17(9): 128-146. |
[45] | LIANG Y C , TAN J J , JIA H N ,et al. Realizing intelligent spectrum management for integrated satellite and terrestrial networks[J]. Journal of Communications and Information Networks, 2021,6(1): 32-43. |
[46] | LI S X , CHEN Q , LI Z ,et al. Civil aircraft assisted space-air-ground integrated networks:architecture design and coverage analysis[J]. China Communications, 2022,19(1): 29-39. |
[47] | KATO N , FADLULLAH Z M , TANG F ,et al. Optimizing space-air-ground integrated networks by artificial intelligence:IEEE,10.1109/MWC.2018.1800365[P]. 2018. |
[48] | 王朱伟, 徐广书, 买天乐 ,等. 基于AI的LEO卫星网络资源管理架构设计[J]. 信息技术与网络安全, 2018,37(2): 20-22,36. |
WANG Z W , XU G S , MAI T L ,et al. Design of LEO satellite network resource management architecture based on AI[J]. Information Technology and Network Security, 2018,37(2): 20-22,36. | |
[49] | 周小伟, 郑伟 . AI人工智能技术在天基通信中的应用分析[J]. 电子测试, 2021(6): 55-56. |
ZHOU X W , ZHENG W . Application analysis of AI Artificial Intelligence Technology in space based communication[J]. Electronic Test, 2021(6): 55-56. | |
[50] | FERREIRA P V R , PAFFENROTH R , WYGLINSKI A M ,et al. Multiobjective reinforcement learning for cognitive satellite communications using deep neural network ensembles[J]. IEEE Journal on Selected Areas in Communications, 2018,36(5): 1030-1041. |
[51] | 唐斯琪, 潘志松, 胡谷雨 ,等. 智能化卫星互联网运维与管理:现状与机遇[J]. 天地一体化信息网络, 2021,2(4): 75-83. |
TANG S Q , PAN Z S , HU G Y ,et al. Intelligent satellite Internet maintenance and management:progress and opportunities[J]. Space-Integrated-Ground Information Networks, 2021,2(4): 75-83. | |
[52] | 杜丹冰 . 一种优化空天地一体化网络吞吐量算法[J]. 弹箭与制导学报, 2022: 1-6. |
DU D B . An algorithm for optimizing throughput of air-space integrated network[J]. Journal of Projectiles,Arrows and Guidance, 2022: 1-6. | |
[53] | 杨力, 何兆斌, 孔志翔 . 天地一体化智能网络智能节点部署策略[J]. 小型微型计算机系统, 2022,43(1): 159-164. |
YANG L , HE Z B , KONG Z X . Deployment strategy of intelligent node in integrated intelligent network[J]. Journal of Chinese Computer Systems, 2022,43(1): 159-164. | |
[54] | 周家豪 . 面向天地一体化网络的智能接入控制与资源分配机制研究[D]. 成都:电子科技大学, 2022. |
ZHOU J H . Research on intelligent access control and resource allocation mechanism for space-air-ground integrated network[D]. Chengdu:University of Electronic Science and Technology of China, 2022. | |
[55] | 王鹏, 张佳鑫, 张兴 ,等. 低轨卫星智能多接入边缘计算网络:需求、架构、机遇与挑战[J]. 移动通信, 2021,45(5): 35-46. |
WANG P , ZHANG J X , ZHANG X ,et al. Low earth orbit satellite intelligent multi-access edge computing networks:requirements,architecture,opportunities and challenges[J]. Mobile Communications, 2021,45(5): 35-46. | |
[56] | 崔涛, 任智源, 黎军 ,等. 卫星互联网业务智能识别分类算法与仿真[J]. 天地一体化信息网络, 2022,3(2): 72-80. |
CUI T , REN Z Y , LI J ,et al. Intelligent identification and classification algorithm and simulation of satellite Internet business[J]. Space-Integrated-Ground Information Networks, 2022,3(2): 72-80. | |
[57] | 毛伯敏, 郭鸿志, 刘家佳 . 卫星物联网中服务质量与安全的智能联合优化方法[J]. 移动通信, 2021,45(5): 31-34. |
MAO B M , GUO H Z , LIU J J . Intelligent joint optimizations of QoS and security for satellite Internet of Things[J]. Mobile Communications, 2021,45(5): 31-34. |
[1] | 郭泽华, 朱昊文, 徐同文. 面向分布式机器学习的网络模态创新[J]. 电信科学, 2023, 39(6): 44-51. |
[2] | 孙耀华, 彭木根. 面向手机直连的低轨卫星通信:关键技术、发展现状与未来展望[J]. 电信科学, 2023, 39(2): 25-36. |
[3] | 康宇, 刘雅琼, 赵彤雨, 寿国础. AI算法在车联网通信与计算中的应用综述[J]. 电信科学, 2023, 39(1): 1-19. |
[4] | 王文哲, 安岗, 李忻, 张伟强, 刘振华, 郑念卿, 陈盛伟, 赵文东, 狄子翔, 顾照杰. 面向空天地一体化场景的5G卫星双模终端需求及应用探讨[J]. 电信科学, 2022, 38(Z1): 221-230. |
[5] | 章坚武, 安彦军, 邓黄燕. DNS攻击检测与安全防护研究综述[J]. 电信科学, 2022, 38(9): 1-17. |
[6] | 邓平科, 张同须, 施南翔, 张童, 邵天竺, 郑韶雯. 星算网络——空天地一体化算力融合网络新发展[J]. 电信科学, 2022, 38(6): 71-81. |
[7] | 常晓宇, 张伟嘉, 李旭东, 张晓男, 王港, 贾钢. 遥感卫星随遇接入互联网星座和在轨智能处理[J]. 电信科学, 2022, 38(4): 59-69. |
[8] | 余乐, 朱立东, 金亮, 李佳立, 刘轶伦, 郭晟. 基于广义近似消息传递的扰码多址卫星接收技术[J]. 电信科学, 2022, 38(4): 77-89. |
[9] | 张振华, 孙思月, 刘高赛, 王龙, 姜兴龙, 董琳, 梁广. 卫星互联网光电混合交换技术综述[J]. 电信科学, 2022, 38(11): 1-10. |
[10] | 胡馨元, 邓若琪, 邸博雅, 张泓亮, 宋令阳. 可重构全息超表面辅助卫星通信关键技术[J]. 电信科学, 2022, 38(10): 46-56. |
[11] | 周志超, 冯毅, 夏小涵, 冯瑜瑶, 蔡超, 邱佳慧, 杨立辉, 乌云霄. 基于移动蜂窝网的机器学习室外指纹定位方案[J]. 电信科学, 2021, 37(8): 85-95. |
[12] | 吴晓文, 焦侦丰, 凌翔, 刘冰, 朱立东, 韩磊. 面向6G的卫星通信网络架构展望[J]. 电信科学, 2021, 37(7): 1-14. |
[13] | 吴晓文, 凌翔, 朱立东, 焦侦丰, 程剑, 杨博. 6G卫星通信接入及移动性管理技术[J]. 电信科学, 2021, 37(6): 78-90. |
[14] | 李想,李原,张子飞,杨哲. 基于密度聚类的网络性能故障大数据分析方法[J]. 电信科学, 2020, 36(9): 51-58. |
[15] | 肖子玉. 面向2030的未来网络关键技术综述——Beyond 5G[J]. 电信科学, 2020, 36(9): 114-121. |
阅读次数 | ||||||
全文 |
|
|||||
摘要 |
|
|||||
|