A preemptive polling protocol for applications in wireless LANs |
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Authors: | Del Re Enrico Fantacci Romano Manfucci Carlo |
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Affiliation: | (1) Dipartimento di Ingegneria Elettronica, Università di Firenze, Via S. Marta, 3, Florence, Italy |
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Abstract: | This paper deals with a radio‐based communication network with a single radio channel shared by several data terminals for
transmissions to a single hub station. In particular, the communication system considered is a potential provider of wireless
LAN‐like services. The focus is on the capacity of combining a preemptive polling‐based multiple access scheme with a Selective
Repeat ARQ technique to counteract the effect of the nonstationary transmission channel. The nonstationary transmission channel
has been modeled as a two‐state Markov chain with parameters related to actual propagation conditions. Typical outdoor/indoor
environments have been considered. The main idea is that of making the service interruption of the preemptive polling scheme
dependent on the propagation conditions of the transmission channel by monitoring the outcome of the data packet transmission
attempts. A performance comparison clearly reveals the superiority of this preemptive polling scheme with respect to the classical
cyclic polling scheme.
This revised version was published online in June 2006 with corrections to the Cover Date. |
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