Topic
Ad hoc wireless distribution service
About: Ad hoc wireless distribution service is a research topic. Over the lifetime, 17734 publications have been published within this topic receiving 488205 citations.
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01 Jan 2008
TL;DR: The studies have shown that reactive protocols perform better than proactive protocols, and DSR has performed well for the performance parameters namely delivery ratio and routing overload while AODV performed better in terms of average delay.
Abstract: Summary The Efficient routing protocols can provide significant benefits to mobile ad hoc networks, in terms of both performance and reliability. Many routing protocols for such networks have been proposed so far. Amongst the most popular ones are Ad hoc Ondemand Distance Vector (AODV), Destination-Sequenced Distance-Vector Routing protocol (DSDV), Dynamic Source Routing Protocol (DSR), and Optimum Link State Routing (OLSR). Despite the popularity of those protocols, research efforts have not focused much in evaluating their performance when applied to variable bit rate (VBR). In this paper we present our observations regarding the performance comparison of the above protocols for VBR in mobile ad hoc networks (MANETs). We perform extensive simulations, using NS-2 simulator. Our studies have shown that reactive protocols perform better than proactive protocols. Further DSR has performed well for the performance parameters namely delivery ratio and routing overload while AODV performed better in terms of average delay.
125 citations
01 Apr 2007
TL;DR: A distributed spectrum-agile MAC (media access control) protocol equipped with a dynamic channel selection algorithm, formulated as a multi-armed bandit problem, and the optimal channel selection rules are derived.
Abstract: Widespread deployment of wireless networks under different services including wireless LANs and sensor networks in a shared spectrum has caused many interference and performance issues in dense networks. Specifically, such coexistence poses significant challenges on media access protocol design. This paper addresses this problem by proposing a distributed spectrum-agile MAC (media access control) protocol. It is a multichannel CSMA-based protocol equipped with a dynamic channel selection algorithm. The dynamic channel selection problem is formulated as a multi-armed bandit problem, and the optimal channel selection rules are derived. Finally the advantage of the new protocol is demonstrated through simulation.
125 citations
TL;DR: This work proposes a novel model of service provisioning in ad hoc networks based on the concept of context- aware migratory services, and built TJam, a proof-of-concept migratory service that predicts traffic jams in a given region of a highway by using only car-to-car short-range wireless communication.
Abstract: Ad hoc networks can be used not only as data carriers for mobile devices but also as providers of a new class of services specific to ubiquitous computing environments. Building services in ad hoc networks, however, is challenging due to the rapidly changing operating contexts, which often lead to situations where a node hosting a certain service becomes unsuitable for hosting the service execution any longer. We propose a novel model of service provisioning in ad hoc networks based on the concept of context- aware migratory services. Unlike a regular service that executes always on the same node, a migratory service can migrate to different nodes in the network in order to accomplish its task. The migration is triggered by changes of the operating context, and it occurs transparently to the client application. We designed and implemented a framework for developing migratory services. We built TJam, a proof-of-concept migratory service that predicts traffic jams in a given region of a highway by using only car-to-car short-range wireless communication. The experimental results obtained over an ad hoc network of personal digital assistants (PDAs) show the effectiveness of our approach in the presence of frequent disconnections. We also present simulation results that demonstrate the benefits of migratory services in large-scale networks compared to a statically centralized approach.
124 citations
09 Apr 2003
TL;DR: Investigation of small size ad hoc networks with the global Internet can be realized by ad hoc gateways, which are proposed in this paper and indicate that cellular ad hoc networking seems to be a promising solution to fulfill the requirements of future wireless communication systems.
Abstract: This paper discusses the role of ad hoc networking in future wireless communications. Ad hoc networks are classified as isolated ad hoc networks with large and small sizes, integrated ad hoc networks in various scenarios and cellular ad hoc networks for the future mobile access networks. The very low traffic performance of large-scale ad hoc networks is shown by simulation results, indicating such a king of networks having little commercial potential. Small size ad hoc networks seem to be ubiquitous because of the availability of cheap wireless LAN technologies. Integration of small size ad hoc networks with the global Internet can be realized by ad hoc gateways, which are proposed in this paper. In contrast to large scale isolated ad hoc networks, traffic performance of a cellular ad hoc network is very promising, indicating that cellular ad hoc networking seems to be a promising solution to fulfill the requirements of future wireless communication systems.
124 citations