Two major goals of vehicular ad hoc networks (VANETs) are to improve road safety and to increase transportation efficiency. In order to achieve these goals, a reliable and efficient medium access control (MAC) protocol is required. MAC protocols for VANETs must balance the delivery success rate, delay, throughput, bandwidth utilization, fairness and overhead of the transmitted packets. In this ...

Sensor networks are autonomous networks that consist of up to thousands of nodes performing some specific task such as sensing environmental events. The devices are highly constrained: The devices have for example poor computing capabilities and battery resources. The nodes need to communicate with other nodes to convey the sensed information to a device collecting the data. When designing MAC ...

This paper addresses the issue of deafness in MAC (Medium Access Control) protocols for wireless ad hoc networks using directional antennas. Directional antennas are expected to provide significant improvements over omni-directional antennas in ad hoc networks, such as high spatial reuse and range extension. Recently, several MAC protocols using directional antennas, typically referred to as di...

The challenge of designing an efficient Medium Access Control (MAC) protocol and analyzing it has been an important research topic for over 30 years. This thesis focuses on the performance analysis and enhancement of MAC protocols, particularly the random access protocols. Performance of the two widely known random access MAC protocols – the IEEE 802.3 MAC protocol that employs the Carrier Sens...

Wireless body area network has become a prominent solution in mobile health. The leading use of wireless sensor networks and constant miniaturization of electric devices has empowered the progress of wireless body area networks. These devices provide continuous health monitoring and real time feedback to the user and medical personnel. The wide variety of sensors offers numerous new practical a...

Wireless Sensor Network (WSN) is an attractive choice for a variety of applications as no wired infrastructure is needed. Other wireless networks are not as energy constrained as WSNs, because they may be plugged into the mains supply or equipped with batteries that are rechargeable and replaceable. Among others, one of the main sources of energy depletion in WSN is communications controlled by...

With recent advances in wireless networking, Wireless Body Area Networks (WBANs) became practically feasible. This paper presents a survey about energy-efficient MAC protocols for WBANs. The importance and significance of MAC protocols are discussed. Several methods that provide energy efficiency for WBANs are identified. Also highlights features of various existing MAC protocols along with the...

Mobile computing is the way of the future, as evident by such initiatives as Bluetooth, Iceberg and HomeRF. However, for mobile computing to be successful, an obvious layer, the MAC layer, must be efficient in channel access and reservation. Therefore, in-depth understanding is needed of the wireless MAC' layer if wireless computing is to takeoff. Many random access wireless MAC protocols have ...

In this paper, we address the question that how to design efficient MAC protocols in selfish and noncooperative networks, which is crucial in nowadays open environments. We model the medium access control problem as a non-cooperative game in which the MAC protocol can be regarded as distributed strategy update scheme approaching the equilibrium point. Under such game theoretical framework, thre...