Lu Xueyi graduated from the Philosophy Department of Beijing University in 1962. He pursued graduate studies at the Philosophy Institute of the Chinese Academy of Social Sciences during 1962-1965. He has long been eng...Lu Xueyi graduated from the Philosophy Department of Beijing University in 1962. He pursued graduate studies at the Philosophy Institute of the Chinese Academy of Social Sciences during 1962-1965. He has long been engaged in the study of sociology, social structure and rural development. He worked once as director of the Sociology Institute of CASS. After 1998 he.. has served as member of the Academic Committee of CASS. In 1996 he became president of China Sociology Society. He was a deputy to the Eighth and Ninth National People＇s Congresses. He is author of The Chinese Countryside and Chinese Farmers amid Reforms, Chinese Society in a Transitional Period, Evolution of China＇s Social Structure and On Agriculture, the Countryside and Peasantry.展开更多
Mega low Earth orbit(LEO)satellite networks serve as effective complements to terrestrial networks.However,the dual mobility of users and LEO satellites makes inter-satellite handovers more frequent for users.Moreover...Mega low Earth orbit(LEO)satellite networks serve as effective complements to terrestrial networks.However,the dual mobility of users and LEO satellites makes inter-satellite handovers more frequent for users.Moreover,there are both ascending and descending segments in widely deployed walker-delta constellations.Even if the locations of users do not change,when the access satellites of the communicating parties are not in the same ascending or descending segment,the end-to-end latency between them will increase.To address this challenge,the self-decision handover(SDH)strategy and the joint decision handover(JDH)strategy are proposed,and they both incorporate the routing hops as a crucial handover criterion to minimize the end-to-end latency.In addition,the shortest route hop-count algorithm is designed to assist in the handover decision-making process.Simulations demonstrate that the proposed handover strategies outperform the traditional handover strategies in terms of the number of handovers and end-to-end latency.展开更多
文摘Lu Xueyi graduated from the Philosophy Department of Beijing University in 1962. He pursued graduate studies at the Philosophy Institute of the Chinese Academy of Social Sciences during 1962-1965. He has long been engaged in the study of sociology, social structure and rural development. He worked once as director of the Sociology Institute of CASS. After 1998 he.. has served as member of the Academic Committee of CASS. In 1996 he became president of China Sociology Society. He was a deputy to the Eighth and Ninth National People＇s Congresses. He is author of The Chinese Countryside and Chinese Farmers amid Reforms, Chinese Society in a Transitional Period, Evolution of China＇s Social Structure and On Agriculture, the Countryside and Peasantry.
基金supported by the State Key Laboratory of Micro-Spacecraft Rapid Design and Intelligent Cluster(MS01240103)the National Natural Science Foundation of China(62071146,62431009)+2 种基金the National 2011 Collaborative Innovation Center of Wireless Communication Technologies(2242022k60006)the Research Project Fund of Songjiang Laboratory(SL20230104)Heilongjiang Province Postdoctoral General Foundation(LBH-Z22133)。
文摘Mega low Earth orbit(LEO)satellite networks serve as effective complements to terrestrial networks.However,the dual mobility of users and LEO satellites makes inter-satellite handovers more frequent for users.Moreover,there are both ascending and descending segments in widely deployed walker-delta constellations.Even if the locations of users do not change,when the access satellites of the communicating parties are not in the same ascending or descending segment,the end-to-end latency between them will increase.To address this challenge,the self-decision handover(SDH)strategy and the joint decision handover(JDH)strategy are proposed,and they both incorporate the routing hops as a crucial handover criterion to minimize the end-to-end latency.In addition,the shortest route hop-count algorithm is designed to assist in the handover decision-making process.Simulations demonstrate that the proposed handover strategies outperform the traditional handover strategies in terms of the number of handovers and end-to-end latency.
