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Slotted ALOHA land-mobile radio networks with site diversity

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1 Author(s)
Linnartz, J.-P.M.G. ; Dept. of Electr. Eng., Delft Univ. of Technol., Netherlands

An analytical method for investigating slotted ALOHA land-mobile networks is presented. The probability of successful reception and throughput is assessed for a single base station, taking account of contending transmissions and receiver noise. Receiver capture is assumed to occur if the received signal power exceeds the joint interference power by a certain margin, called the receiver threshold. Rayleigh fading and UHF groundwave propagation are considered. Results are extended for a cellular network considering the interference from packet transmissions in other (co-channel) cells. It is seen that in packet-switched cellular nets, frequency reuse distances may be substantially smaller than in circuit-switched (CW) telephony networks, where each cell has to be safeguarded continuously from co-channel interference. Moreover, a technique to assess the throughput of ALOHA networks with multiple, geographically-separated base stations is presented and numerical results are given for uniform Poisson-distributed packet transmissions in the service area.<>

Published in:

Communications, Speech and Vision, IEE Proceedings I  (Volume:139 ,  Issue: 1 )