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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20 Mar 2003
TL;DR: The feasibility of a new DAD approach is investigated: the detection of duplicate addresses in a passive way, only by monitoring routing protocol traffic, based on classic link state routing.
Abstract: Auto-configuration of nodes is an important issue in self-organizing mobile ad hoc networks (MANETs). Especially the property of unique addresses is critical for the main task of a data network: the delivery of packets to the intended destination. Stateless auto-configuration allows a node to construct an address on its own. Duplicate address detection (DAD), usually done by sending a query to the chosen address and waiting for a response, can be used to ensure the uniqueness of this address. The other approach, the distributed assignment of a priori unique address, can also be a bandwidth consuming task in a dynamic environment. In both cases, a merger of two configured networks is very difficult to detect and can lead to duplicate addresses. Thus, a continuous and bandwidth-efficient duplicate address detection mechanism would be eligible. In this paper, the feasibility of a new DAD approach is investigated: the detection of duplicate addresses in a passive way, only by monitoring routing protocol traffic. Based on classic link state routing, three concepts of passive duplicate address detection (PDAD) are proposed. Two link-state protocols currently in discussion in the IETF MANET working group, the fisheye state routing (FSR) protocol and the optimized link state routing (FSR) protocol and the optimized link state routing protocol (OLSR), are analyzed regarding these concepts. Finally, first simulation results are presented.
148 citations
09 Apr 2003
TL;DR: The results obtained by extensive simulation experiments show that the proposed scheme does not depend on mobility and node degree of mobile devices in the network, which satisfy the above requirements.
Abstract: A clustering scheme for ad hoc networks is aimed at managing a number of mobile devices by utilizing hierarchical structure of the networks. In order to construct and maintain an effective hierarchical structure in ad hoc networks where mobile devices may move at high mobility, the following requirements must be satisfied. (1) The role of each mobile device for the hierarchical structure is adaptive to dynamic change of the topology of the ad hoc networks. The role of each mobile device should thus change autonomously based on the local information. (2) The overhead for management of the hierarchical structure is small. The number of mobile devices in each cluster should thus be almost equivalent. This paper proposes an adaptive multihop clustering scheme for highly mobile ad hoc networks. The results obtained by extensive simulation experiments show that the proposed scheme does not depend on mobility and node degree of mobile devices in the network, which satisfy the above requirements.
147 citations
01 Dec 2003
TL;DR: An improved virtual carrier sensing mechanism for wireless LAN scenarios is proposed and using analysis and simulation results, it is shown that it can significantly increase the spatial reuse and network throughput.
Abstract: In this paper, we evaluate and suggest methods to improve the performance of IEEE 802.11 based ad hoc networks from the perspective of spatial reuse. Since 802.11 employs virtual carrier sensing to reserve the medium prior to a packet transmission, the relative size of the spatial region it reserves for the impending traffic significantly affects the overall network performance. We show that the space reserved by 802.11 for a successful transmission is far from optimal and depending on the one hop distances between the sender and the receiver. We study three scenarios with very different spatial reuse characteristics. We also introduce a new quantitative measure, the spatial reuse index, to evaluate the efficiency of the medium reservation accomplished by 802.11 virtual carrier sensing. We also propose an improved virtual carrier sensing mechanism for wireless LAN scenarios and using analysis and simulation results, show that it can significantly increase the spatial reuse and network throughput.
147 citations
24 Oct 2008
146 citations
TL;DR: The paper discuses a broad range of research issues such as Routing, Medium Access, Multicasting, Quality of service, TCP performance, Energy, Security and Bluetooth, outlining the major challenges which have to be solved before widespread deployment of the technology is possible.
Abstract: This paper presents a coherent survey on ad hoc wireless networks, with the intent of serving as a quick reference to the current research issues in ad hoc networking. It starts with a background on the origin and development stages of ad hoc network, then summaries the characteristics, capabilities, applications and design constraints of ad hoc network fully distinguishing it from traditional networks. The paper discuses a broad range of research issues such as Routing, Medium Access, Multicasting, Quality of service, TCP performance, Energy, Security and Bluetooth, outlining the major challenges which have to be solved before widespread deployment of the technology is possible. Through this survey it would be seen that Ad ho c Networking presence an interesting research area inheriting the problems of wireless and mobile communications in their most difficult form.
146 citations