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.

How to misuse AODV: a case study of insider attacks against mobile ad-hoc routing protocols

Abstract: This paper presents a systematic analysis of insider attacks against mobile ad-hoc routing protocols, using the Ad-hoc On-Demand Distance Vector (AODV) protocol as an example. It identifies a number of attack goals, and then studies how to achieve these goals through misuses of the routing messages. To facilitate the analysis, it classifies insider attacks into two categories: atomic misuses and compound misuses. Atomic misuses are performed by manipulating a single routing message, which cannot be further divided; compound misuses are composed of combinations of atomic misuses and possibly normal uses of the routing protocol. The analysis results in this paper reveal several classes of insider attacks, including route disruption, route invasion, node isolation, and resource consumption. Finally, this paper presents simulation results that validate and demonstrate the impact of these attacks.

IEEE 802.11s wireless mesh networks: Framework and challenges

Abstract: Wireless mesh networking based on 802.11 wireless local area network (WLAN) has been actively explored for a few years. To improve the performance of WLAN mesh networks, a few new communication protocols have been developed in recent years. However, these solutions are usually proprietary and prevent WLAN mesh networks from interworking with each other. Thus, a standard becomes indispensable for WLAN mesh networks. To meet this need, an IEEE 802.11 task group, i.e., 802.11s, is specifying a standard for WLAN mesh networks. Although several standard drafts have been released by 802.11s, many issues still remain to be resolved. In order to understand what performance can be expected from the existing framework of 802.11s standard and what functionalities shall be added to 802.11s standard to improve performance, a detailed study on the existing 802.11s standard is given in this paper. The existing framework of 802.11s standard is first presented, followed by pointing out the challenging research issues that still exist in the current 802.11 standard. The purpose of this paper is to motivate other researchers to develop new scalable protocols for 802.11 wireless mesh networks.

Mobile Ad Hoc Networks

Abstract: Publisher Summary Communication is maintained by the transmission of data packets over a common wireless channel. The absence of any fixed infrastructure such as an array of base stations, make ad hoc networks radically different from other wireless local area networks (LANs). All nodes in an ad hoc network are required to relay packets on behalf of other nodes. Hence, a mobile ad hoc network is sometimes called a multihop wireless network. The physical layer must tackle the path loss, fading, and multi-user interference to maintain stable communication links between peers. This chapter highlights the main aspects of designing the physical transmission system, which are dependent on the characteristics of the radio propagation channel such as path loss, interference (co-channel), and fading. Directional transmission can reduce the amount of interference, reduce packet error, and directional antennas have a higher gain due to their directivity. Despite these advantages, the usage of directional antennas in mobile ad hoc networks has additional design challenges. The crucial design issue in protocols is to detect when to initiate a preemptive route discovery to find a better route.

Variable-Range Transmission Power Control in Wireless Ad Hoc Networks

Abstract: In this paper, we investigate the impact of variable-range transmission power control on the physical and network connectivity, on network capacity, and on power savings in wireless multihop networks. First, using previous work by Steele (1988), we show that, for a path attenuation factor a = 2, the average range of links in a planar random network of A m2 having n nodes is ~aradicA/n1. We show that this average range is approximately half the range obtained when common-range transmission control is used. Combining this result and previous work by Gupta and Kumar (2000), we derive an expression for the average traffic carrying capacity of variable-range-based multihop networks. For a = 2, we show that this capacity remains constant even when more nodes are added to the network. Second, we derive a model that approximates the signaling overhead of a routing protocol as a function of the transmission range and node mobility for both route discovery and route maintenance. We show that there is an optimum setting for the transmission range, not necessarily the minimum, which maximizes the capacity available to nodes in the presence of node mobility. The results presented in this paper highlight the need to design future MAC and routing protocols for wireless ad hoc and sensor networks based, not on common-range which is prevalent today, but on variable-range power control

Performance evaluation of battery-life-aware routing schemes for wireless ad hoc networks

Abstract: Advances in battery technology have fallen behind that of CPU technology. Since each node in an ad hoc wireless network operates on batteries, power consumption becomes an important factor. To maximize the lifetime of ad hoc wireless networks, the power consumption rate of each mobile host must be evenly distributed. Also, the overall transmission power for each connection request must be minimized. These two objectives, however, cannot be satisfied concurrently with existing ad hoc routing algorithms. Hence, we present a new power-aware routing scheme to satisfy these two constraints simultaneously. Simulation results reveal that our proposed scheme outperforms others.