Adaptive mobile access protocol (AMAP) for the message service of a land mobile satellite experiment (MSAT-X)

• Published in: IEEE transactions on vehicular technology Vol. 33; no. 3; pp. 237 - 243
• Main Authors: Li, V.O.K., Tsun-Yee Yan
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.08.1984; Institute of Electrical and Electronics Engineers
• Subjects: Access protocols; Applied sciences; Exact sciences and technology; FCC; Message service; Mobile antennas; Mobile communication; NASA; Propulsion; Radiocommunications; Satellites; Space technology; Space vehicles; Telecommunications; Telecommunications and information theory; Mobile radiocommunication; Multiple access; Transmission protocol; Satellite telecommunication; Data transmission network; Data transmission; Optimization
• ISSN: 0018-9545; 1939-9359
• DOI: 10.1109/T-VT.1984.24011

This paper describes a feasibility study of the adaptive mobile access protocol (AMAP) for MSAT-X, a proposed experimental mobile satellite communication network. The mobiles are dispersed over a wide geographical area and the channel data rate is limited due to the size and cost limitations of mobile antennas. AMAP is a reservation based multiple-access scheme. The available bandwidth is divided into subchannels, which are divided into reservation and message channels. The ALOHA multiple-access scheme is employed in the reservation channels, while the message channels are demand assigned. AMAP adaptively reallocates the reservation and message channels to optimize system performance. It has been shown that if messages are generated at a rate of one message per hour, AMAP can support approximately 2000 active users per 2400 bit/s channel with an average delay of 1.4 s.