Di Zhang;Yuanyuan Peng;Ying Ke;Jinpeng Song;Shuai Wang;Gaofeng Pan;Jianping An
{"title":"低轨道卫星-地面上行传输的信息变化时代","authors":"Di Zhang;Yuanyuan Peng;Ying Ke;Jinpeng Song;Shuai Wang;Gaofeng Pan;Jianping An","doi":"10.1109/TVT.2025.3540572","DOIUrl":null,"url":null,"abstract":"Age of Information (AoI) is a critical metric that can be used to assess the freshness of information in highly dynamic low-earth orbit (LEO) terrestrial-satellite communications. In most existing research on the AoI of wireless transmissions, the packet transmission rate rarely changes. However, over a given period of time and without perfect transmit power control, the transmission rate of LEO terrestrial-satellite links cannot remain constant. This is due to the time-varying path loss fading experienced by the transmitted signal over the LEO terrestrial-satellite links, as the LEO satellites can travel at speeds exceeding Mach 10 and complete 12-16 Earth orbits per day. Inspired by this observation, this paper investigates the effects of the swift motion of LEO satellites on the freshness of information in LEO terrestrial-satellite uplink transmissions. At the same time, the Slotted Aloha protocol is considered to manage the process of multiple ground nodes accessing the LEO satellites. The closed-form expression for the average AoI of the LEO terrestrial-satellite uplink transmissions is explicitly derived for the single ground node scenario. Furthermore, a model for analyzing the average AoI in the multi-ground node scenario is proposed accordingly. Finally, numerical results are presented to validate the proposed analysis models of the average AoI and to investigate the AoI variation in the target LEO terrestrial-satellite transmission systems.","PeriodicalId":13421,"journal":{"name":"IEEE Transactions on Vehicular Technology","volume":"74 6","pages":"9645-9655"},"PeriodicalIF":7.1000,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Age of Information Variation of LEO Satellite-Terrestrial Uplink Transmissions\",\"authors\":\"Di Zhang;Yuanyuan Peng;Ying Ke;Jinpeng Song;Shuai Wang;Gaofeng Pan;Jianping An\",\"doi\":\"10.1109/TVT.2025.3540572\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Age of Information (AoI) is a critical metric that can be used to assess the freshness of information in highly dynamic low-earth orbit (LEO) terrestrial-satellite communications. In most existing research on the AoI of wireless transmissions, the packet transmission rate rarely changes. However, over a given period of time and without perfect transmit power control, the transmission rate of LEO terrestrial-satellite links cannot remain constant. This is due to the time-varying path loss fading experienced by the transmitted signal over the LEO terrestrial-satellite links, as the LEO satellites can travel at speeds exceeding Mach 10 and complete 12-16 Earth orbits per day. Inspired by this observation, this paper investigates the effects of the swift motion of LEO satellites on the freshness of information in LEO terrestrial-satellite uplink transmissions. At the same time, the Slotted Aloha protocol is considered to manage the process of multiple ground nodes accessing the LEO satellites. The closed-form expression for the average AoI of the LEO terrestrial-satellite uplink transmissions is explicitly derived for the single ground node scenario. Furthermore, a model for analyzing the average AoI in the multi-ground node scenario is proposed accordingly. Finally, numerical results are presented to validate the proposed analysis models of the average AoI and to investigate the AoI variation in the target LEO terrestrial-satellite transmission systems.\",\"PeriodicalId\":13421,\"journal\":{\"name\":\"IEEE Transactions on Vehicular Technology\",\"volume\":\"74 6\",\"pages\":\"9645-9655\"},\"PeriodicalIF\":7.1000,\"publicationDate\":\"2025-02-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Transactions on Vehicular Technology\",\"FirstCategoryId\":\"94\",\"ListUrlMain\":\"https://ieeexplore.ieee.org/document/10879563/\",\"RegionNum\":2,\"RegionCategory\":\"计算机科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, ELECTRICAL & ELECTRONIC\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Vehicular Technology","FirstCategoryId":"94","ListUrlMain":"https://ieeexplore.ieee.org/document/10879563/","RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
Age of Information Variation of LEO Satellite-Terrestrial Uplink Transmissions
Age of Information (AoI) is a critical metric that can be used to assess the freshness of information in highly dynamic low-earth orbit (LEO) terrestrial-satellite communications. In most existing research on the AoI of wireless transmissions, the packet transmission rate rarely changes. However, over a given period of time and without perfect transmit power control, the transmission rate of LEO terrestrial-satellite links cannot remain constant. This is due to the time-varying path loss fading experienced by the transmitted signal over the LEO terrestrial-satellite links, as the LEO satellites can travel at speeds exceeding Mach 10 and complete 12-16 Earth orbits per day. Inspired by this observation, this paper investigates the effects of the swift motion of LEO satellites on the freshness of information in LEO terrestrial-satellite uplink transmissions. At the same time, the Slotted Aloha protocol is considered to manage the process of multiple ground nodes accessing the LEO satellites. The closed-form expression for the average AoI of the LEO terrestrial-satellite uplink transmissions is explicitly derived for the single ground node scenario. Furthermore, a model for analyzing the average AoI in the multi-ground node scenario is proposed accordingly. Finally, numerical results are presented to validate the proposed analysis models of the average AoI and to investigate the AoI variation in the target LEO terrestrial-satellite transmission systems.
期刊介绍：
The scope of the Transactions is threefold (which was approved by the IEEE Periodicals Committee in 1967) and is published on the journal website as follows: Communications: The use of mobile radio on land, sea, and air, including cellular radio, two-way radio, and one-way radio, with applications to dispatch and control vehicles, mobile radiotelephone, radio paging, and status monitoring and reporting. Related areas include spectrum usage, component radio equipment such as cavities and antennas, compute control for radio systems, digital modulation and transmission techniques, mobile radio circuit design, radio propagation for vehicular communications, effects of ignition noise and radio frequency interference, and consideration of the vehicle as part of the radio operating environment. Transportation Systems: The use of electronic technology for the control of ground transportation systems including, but not limited to, traffic aid systems; traffic control systems; automatic vehicle identification, location, and monitoring systems; automated transport systems, with single and multiple vehicle control; and moving walkways or people-movers. Vehicular Electronics: The use of electronic or electrical components and systems for control, propulsion, or auxiliary functions, including but not limited to, electronic controls for engineer, drive train, convenience, safety, and other vehicle systems; sensors, actuators, and microprocessors for onboard use; electronic fuel control systems; vehicle electrical components and systems collision avoidance systems; electromagnetic compatibility in the vehicle environment; and electric vehicles and controls.
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