Enhanced Variable Power Broadcasting Based on Local Information in Mobile Ad Hoc Networks

Abstract

Broadcasting in mobile ad hoc networks (MANETs) usually involve fixed transmission power that covers, for example an area within 250 meters. However, it is often unnecessary to broadcast using fixed power because a node that needs to be covered may just be 100 meters away. By reducing the transmission power enough to cover this node, energy expenditure would be reduced, thus, prolonging the lifetime of a battery-powered MANET. Existing works on variable power broadcasting based on local information are effective in achieving this objective. However, they are not optimized and can be improved by dynamically adjusting the transmission power based on where a broadcast message comes from. This paper proposes simple mechanisms based on local knowledge to adjust the transmission power dynamically and incorporates a timer suppression mechanism to further enhance the effectiveness of the protocols in reducing energy expenditure. Results of simulation studies confirm the effectiveness of the proposed enhancements.

Variable power broadcasting based on local information for source-dependent broadcasting protocols

“…Another notable observation is that INOPbased protocols are slightly more energy efficient and the number of broadcasting nodes is only marginally higher than PABLO-based protocols. This is inline with previous findings that INOP and its variants are more effective than PABLObased protocols [10,11]. Finally, our proposed VE-TDP is the most energy efficient protocol mainly because it incurs the least number of broadcasting nodes.…”

“…Our proposed Enhanced PABLO or E-PABLO was motivated by our previous work on Power Adaptive Broadcasting with Local Information (PABLO) protocol presented in [10]. It was developed specifically for self-pruning broadcasting protocols.…”

“…Enhanced Inside-Out Power Adaptive Approach or E-INOP is another extension from our earlier work in [10]. E-INOP is summarized in Algorithm 2.…”