he ability to communicate with anyone on the planet from anywhere on the planet has been mankind’s dream for a long time. Wireless is the only medium that can enable such untethered communication. With the recent advances in VLSI and wireless technologies, it is now possible to build high-speed wireless systems that are cheap as well as easy to install and operate. However, the wireless medium ...

Wireless networks are becoming ubiquitous. They have numerous applications also outside the cellular systems, for example in agriculture, multi-user games, healthmonitoring using body area networks, and security surveillance. Wireless networks operate using a limited and unstable radio resource, yet they must provide a reliable service for an array of varying applications and mobility patterns....

This paper, explain a comprehensive survey of recent medium access control (MAC) Protocols for wireless body area networks (WBANs) and presents a comparison of the various approaches pursued. Apart for this, we outline the crucial attributes for a good MAC. Then, we investigate few MAC Based protocols devised for WBAN by emphasizing their Merit and Demerits. As a conclusion, we put forward a nu...

Energy Efficiency and low latency are considered to be most important performance metrics for the performance of Wireless Sensor Networks. Communication is a big part of energy consumption and MAC protocols directly control this communication. In this paper the comparison has been carried out between two MAC protocols LL MAC protocol and a new sleep schedule Q-MAC protocol. Both QMAC and LLMAC ...

New wireless network paradigms will demand higher spectrum use and availability to cope with emerging data-hungry devices. Traditional static spectrum allocation policies cause spectrum scarcity, and new paradigms such as Cognitive Radio (CR) and new protocols and techniques need to be developed in order to have efficient spectrum usage. Medium Access Control (MAC) protocols are accountable for...

A Mobile Sensor Network is a geographically distributed network which owes its name to the presence of mobile sink or sensor nodes within the network. In this paper we will present and discuss the energy-efficient contention-based and scheduled based medium access control (MAC) protocols for mobile sensor networks (MSNs). Most of the MAC protocols such as T-MAC , D-MAC, and the more commonly ut...

We study the interaction between communication protocols, network topology and packet traffic in wireless static radio networks. A particular interest is to empirically characterize the effect of interaction between the routing layer and the MAC layer on overall system performance. Three well known MAC protocols: 802.11, CSMA, and MACA are considered. Similarly three recently proposed routing p...

Wireless sensor network are the collection of individual nodes which are able to interact with physical environment statically or dynamically by sensing or controlling physical parameter. Wireless sensor network become a leading solution in many important applications such as intrusion detection, target tracking, industrial automation etc. A major problem with WSN is to determining a most effic...

Multimedia and real-time applications require bandwidth guarantees, which may be achieved by resource reservation. Several researches were done to propose efficient reservation MAC protocols for ad-hoc networks. In these schemes, channel is segmented into super-frames composed of fixed number of slots. They allocate slots to each traffic source, and make sure that neighbor nodes record the rese...