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In this paper, we consider a wireless communication network for both low-speed mobile nodes in densely populated hotspots and high-speed mobile nodes roaming in a large area. Wireless local area networks (WLANs) are deployed in the hotspots, while a delay/disruption tolerant network (DTN) provides services to roaming nodes in the large area with low node density. We investigate radio resource allocation...
In Wi-Fi networks, mobile nodes compete for accessing the shared channel by means of a random access protocol called distributed coordination function (DCF), which is long term fair. But recent drivers allow users to configure protocol parameters differently from their standard values in order to break the protocol fairness and obtain a larger share of the available bandwidth at the expense of other...
The contention-based DCF suffers from collision seriously under heavy load conditions. In this paper, a novel medium access control protocol called contention-polling duality coordination function (CPDCF) is proposed to enhance the DCF-based MAC protocol. A polling ACK mechanism is introduced to admit the designated station to transmit without performing any contention process. By eliminating collisions...
A constantly growing interest in cellular and mobile technology has lead to a need for MAC protocols specifically designed to accommodate high bandwidth multimedia services with high mobility (such as vehicular networks) unlike conventional cellular telephony systems. This paper presents the design and performance evaluation of a MAC protocol for a motorway environment with audio sources and variable...
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