8 Abstract Most applications of Wireless Sensor Networks 9 (WSNs) assume the presence of single-channel Medium 10 Access Control (MAC) protocols. In the usual dense 11 deployment of the sensor networks, single-channel MAC 12 protocols may be deficient because of radio collisions and 13 limited bandwidth. Hence, using multiple channels can 14 significantly improve the performance of WSN. Recent ...

In the current decade, wireless sensor networks are emerging as a peculiar multi-disciplinary research area. By this way, energy efficiency is one of the fundamental research themes in the design of Medium Access Control (MAC) protocols for wireless sensor networks. Thus, in order to optimize the energy consumption in these networks, a variety of MAC protocols are available in the literature. T...

More than 70 percent of Earth is covered with water, while human knowledge of the underwater environment is negligible compared to the land. Underwater wireless acoustic sensor network (UWASN) is one of the newest technology to investigate the underwater. UWASNS is a subdivisions of WSNs in which a variable number of autonomous and self-organize sensor nodes and vehicles are deployed manually o...

Wireless sensor networks (WSNs) are new generation of wireless networks which have many potential applications and unique challenges. Some of their most important problems are their limited resources, independent and autonomous operation and dynamic topology. Also, maximum of energy consumption into these networks is occurred when data transmission. In recent decade, researchers have been tryin...

Underwater sensor network has attracted significant attention recently [1] [2]. On the one hand, it enables a wide range of aquatic applications. On the other hand, harsh underwater environments pose grand challenges to underwater communication and networking. Firstly, acoustic channels have high error probability, long propagation delay and limited bandwidth. Secondly, underwater sensor nodes ...

Existing MAC protocols like TDMA and 802.11 have many disadvantages for scheduling multimedia traffic in CDMA wireless networks. Our objective is to develop a dynamic MAC protocol for WCDMA networks to avoid congestion and improve the channel utilization and throughput of the bulky real-time flows. In this paper, we propose to develop a dynamic MAC protocol for wireless multimedia networks. In ...

Medium access control (MAC) protocols making use of multipacket reception (MPR) capability achieve better throughput than conventional MAC protocols. When a wireless network operates with MPR capable nodes and non-MPR nodes, the MAC protocols must not only utilise the MPR capability to maximise throughput, but must also enable the co-existence with these two types of nodes. We propose a new MPR...

Many routing protocols for wireless sensor networks based on location information have been proposed such as GPSR, LAR, IGF, etc. When these routing protocols are used with existing MAC protocols, however, the sleep and wake-up scheduling of many MAC protocols degrades the routing protocol performance because of the long latency for periodic scheduling and synchronization overhead. In this pape...

This paper presents LB-MAC, a new MAC protocol for asynchronous, duty cycle sensor networks. Different from existing sensor network MAC protocols that usually focus on reducing energy consumption and extending lifetime of individual sensor nodes, LB-MAC aims at prolonging the network lifetime through balancing the nodal lifetime between neighboring sensors. LB-MAC is lightweight and scalable as...

Experiments have shown that unidirectional links are quite common in wireless sensor networks. Still, many MAC protocols ignore their existence, even though they have a tremendous impact on the performance of both TDMAand contention based protocols. In contention based protocols the medium may be assumed free when it is indeed busy. In TDMA based protocols two neighboring nodes might get assign...