A New Effective Analysis for Wireless CSMA/CA LANs Supporting Real-Time Voice and Data Services (Special Section on Multi-dimensional Mobile Information Networks)

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概要

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• Wireless LANs have been used for realizing fully-distributed users in a multimedia environment that has the ability to provide real-time bursty traffic (such as voice or video) and data traffic. In this paper, we present a new realistic and detailed system model and a new effective analysis for the performance of wireless LANs which support multimedia communication with non-persistent carrier sense multiple access with collision avoidance (CSMA/CA) protocol. In this CSMA/CA model, a user with a packet ready to transmit initially sends some pulse signals with random intervals within a collision avoidance period before transmitting the packet to verify a clear channel. The system model consists of a finite number of users to efficiently share a common channel. Each user can be a source of both voice traffic and data traffic. The time axis is slotted, and a frame has a large number of slots and includes two parts: the collision avoidance period and the packet transmission period. A discrete-time Markov process is used to model the system operation. The number or slots in a frame can be arbitrary, dependent on the chosen lengths of the collision avoidance period and packet transmission period. Numerical results are shown in terms of channel utilization and average packet delay for different packet generation rates. They indicate that the network performance can be improved by adequate choice of ratios between the collision avoidance period and transmission period, and the pulse transmission probability.

• 社団法人電子情報通信学会の論文
• 2001-07-01

著者

• Yue Wuyi

  Department of Intelligence and Informatics Konan University

• Yue Wuyi

  Department Of Information Science And Systems Engineering Konan University

• Yue Wuyi

  Department Of Information Science And System Engineering Konan University

• MATSUMOTO Yutaka

  I. T. S., Inc.

• Matsumoto Yutaka

  I. T. S. Inc.

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