Announced dynamic access probability protocol for next generation wireless networks

Zohar Naor, Hanoch Levy

Research output: Contribution to journalArticlepeer-review

Abstract

A multiple access protocol that is particularly suitable for cellular Internet access and satellite-based networks with on-board processing is developed in this paper. The basic idea is that when a user wishes to send a message, it transmits with probability paccess that depends on the load on the channel. Under conditions of low load, the probability paccess approaches 1, while at high load paccess is relatively low. This media access control protocol guarantees high channel utilization at high load, as well as low delay at low load periods. Using the statistical usage of the shared channel, the load is estimated with certain uncertainty. Our analysis shows that using the statistical usage of the shared channel, the optimal access probability can be well estimated for a broad class of load distribution patterns. In addition, we propose to use a central station to broadcast the value of paccess in networks with poor collision detection capability, or long feedback delay. The proposed method is particularly suitable for shared channels with poor collision detection capability, under conditions of bursty traffic and a large number of users. Examples for such channels are the reservation channel in satellite-based networks with on-board processing, and the control channel in cellular networks. Hence, the proposed method can be used for cellular Internet access and for accessing public satellite-based networks. The broadcast mechanism that already exists in such networks can be used to inform the users the dynamic access probability.

Original languageEnglish
Pages (from-to)527-544
Number of pages18
JournalComputer Networks
Volume41
Issue number4
DOIs
StatePublished - 15 Mar 2003

Keywords

  • MAC
  • Multiple access
  • Wireless networks

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