RandomCast: An Energy-Efficient Communication Scheme for Mobile Ad Hoc Networks

RandomCast: An Energy-Efficient Communication Scheme for Mobile Ad Hoc Networks

Domain: Dot Net Mobile Computing

IEEE Transactions on Mobile Computing, Aug. 2009, Volume: 8, Issue: 8

Abstract

In mobile ad hoc networks (MANETs), every node overhears every data transmission occurring in its vicinity and thus, consumes energy unnecessarily.

However, since some MANET routing protocols such as Dynamic Source Routing (DSR) collect route information via overhearing, they would suffer if they are used in combination with 802.11 PSM.

Allowing no overhearing may critically deteriorate the performance of the underlying routing protocol, while unconditional overhearing may offset the advantage of using PSM.

This paper proposes a new communication mechanism, called RandomCast, via which a sender can specify the desired level of overhearing, making a prudent balance between energy and routing performance.

In addition, it reduces redundant rebroadcasts for a broadcast packet, and thus, saves more energy.

RandomCast is highly energy-efficient compared to conventional 802.11 as well as 802.11 PSM-based schemes, in terms of total energy consumption, energy good-put, and energy balance.

Abstract: In mobile ad hoc networks (MANETs), every node overhears every data transmission occurring in its vicinity and thus, consumes energy unnecessarily. However, since some MANET routing protocols such as Dynamic Source Routing (DSR) collect route information via overhearing, they would suffer if they are used in combination with 802.11 PSM. Allowing no overhearing may critically deteriorate the performance of the underlying routing protocol, while unconditional overhearing may offset the advantage of using PSM.

Algorithm / Technique used: Random Cast Algorithm.

Algorithm Description: RandomCast is significant when traffic is light. This is because nodes stay in low-power sleep state more intelligently in RandomCast. It consumes less energy at high traffic condition as well, but the benefit in this case comes from less Rx energy. This is credited to more judicious overhearing decisions than other schemes.

 Existing System: Mobile ad-hoc networking involves peer-to-peer communication in a network with a dynamically changing topology. Achieving energy efficient communication in such a network is more challenging than in cellular networks since there is no centralized arbiter such as a base station that can administer power management. We evaluate a power control loop, similar to those commonly found in cellular networks, for ad-hoc wireless networks. A major focus of research in ad-hoc wireless networking is to reduce energy consumption because the wireless devices are envisioned to have small batteries and be incapable of energy scavenging. We show that this power control loop reduces energy consumption per transmitted.

Proposed System: Proposes a new communication mechanism, called RandomCast, via which a sender can specify the desired level of overhearing, making a prudent balance between energy and routing performance. In addition, it reduces redundant rebroadcasts for a broadcast packet, and thus, saves more energy. RandomCast is highly energy-efficient compared to conventional 802.11 as well as 802.11 PSM-based schemes, in terms of total energy consumption, energy good-put, and energy balance.