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Here we continue the analytic study of packet switching in radio channels which we reported upon m our two previous papers 1, 2 Again we consider a population of terminals communicating with a central station over a packet-switched radio channel. The allocation of bandwidth among the contending terminals can be fixed e.g., time-division multiple access (TDMA) or frequency-division multiple access (FDMA), random e.g., ALOHA or carrier sense multiple access (CSMA) or centrally controlled (e.g., polling or reservation). In this paper we show that with a large population of bursty users, (as expected) random access is superior to both fixed assignment and polling. We also introduce and analyze a dynamic reservation technique which we call split-channel reservation multiple access (SRMA) which is interesting in that it is both simple and efficient over a large range of system parameters.
Tobagi et al. (Sun,) studied this question.