the intelligent transportation system (its) provides wireless and mobile communication between vehicles and infrastructure to improve the safety of transportation and make the journey more enjoyable. this system consists of many fixed and mobile nodes (vehicles, trains, vessels, air planes), wireless and wired telecommunication technologies to exchange information between mobile nodes or betwee...

Abstract. Ad hoc and multi-hop networks will probably be part of the fourth generation of wireless networks, which will integrate networks of several size and capacities with heterogeneous coverage: cellular networks (3G), WLAN hot spots, Wireless Personal Area Networks (WPAN) and Wireless Body Area Networks (WBAN). In this context, MAC protocols play a deciding role for a high utilization of t...

Ad-Hoc wireless networks are self-organizing multi-hop wireless networks, where all the nodes take part in the process of forwarding packets. Ad-Hoc networks can quickly and inexpensively be set up as needed since they do not require any fixed infrastructure, such as base stations or routers. Therefore, they are highly applicable in many fields such as emergency deployments and community networ...

Since wireless mesh networks are ad-hoc in nature, many routing protocols used for ad-hoc networks like AODV are also used for wireless mesh networks by considering only the shortest route to destination. Since data transfer in wireless mesh networks is to and from the AP, these protocols lead to congested routes and overloaded APs. To reduce congestion, the routing protocols such as traffic ba...

In a wireless multi-hop network, one of the important challenges is how to route packets efficiently. The availability of many intermediate nodes between a source and a destination results in having many optional paths/routes to follow. The challenge is to pick an optimal path that satisfies the needed performance requirements-this is the responsibility of the routing protocol. There are four w...

In this paper we propose an efficient approach to determine the optimal hops for multi-hop ad hoc wireless networks. Based on the assumption that nodes use successive interference cancellation (SIC) and maximal ratio combining (MRC) to deal with mutual interference and to utilize all the received signal energy, we show that the signal-tointerference-plus-noise ratio (SINR) of a node is determin...

Ad-hoc wireless networks consist of mobile nodes interconnected by multi-hop wireless paths. Unlike conventional wireless networks, ad-hoc networks have no fixed network infrastructure or administrative support. Because of the dynamic nature of the network topology and limited bandwidth of wireless channels, Quality-of-Service (QoS) provisioning is an inherently complex and difficult issue. In ...

Ad hoc wireless networks are multi-hop networks in which mobile nodes cooperate to maintain network connectivity and perform various functions including routing. This talk focuses on two different views of mobility in ad hoc wireless networks. One view casts mobility as an undesirable feature. This view normally represents an ad hoc wireless network as a traditional graph model. Various mobilit...

Research on congestion control in ad hoc networks has mostly been limited to enhancing TCP based mechanisms [1, 2, 3, 4, 5]. Explicit Link Failure Notification (ELFN [1, 2]), a solution for ad hoc TCP, has been shown to outperform TCP in mobile scenarios. Studies of TCP+ELFN on static networks show throughput degradation of about 5% in several cases over TCP, however, the improvements in dynami...

Mobile ad hoc networks are temporary networks, with varying network topologies. They communicate beyond transmitter range and are supported by multi hop communication through IP routing. Since Mobile Ad Hoc Network is a roaming network, where the host may be connected through various means to the Internet other than it’s fixed-address domain space, it becomes important for the host to have dyna...