Cooperation in Wireless Grids: An Energy Efficient MAC Protocol for Cooperative Network with Game Theory Model
Authors
Anggraeni, Puri Novelti ; Wardana, Satya Ardhy
Term
10. term
Publication year
2007
Pages
59
Abstract
Batterilevetid er afgørende for, hvordan trådløse enheder fungerer under mobil brug. En måde at spare energi på er, at enheder samarbejder, hvilket kan sænke energiforbruget. I idealiserede tilfælde uden et MAC-lag (Medium Access Control) eller uden kollisioner (når flere sender samtidig), er det vist, at samarbejde kan reducere energiforbrug. I praksis kan et eksisterende MAC-lag forringe ydeevnen, så der er behov for en bedre ordning i kooperative netværk. Dette speciale foreslår en ny MAC-ordning, der adresserer energiforbrug i kooperative trådløse netværk. Ordningen evalueres i simuleringer med en kooperativ netværksmodel og sammenlignes med et ideelt system og en eksisterende MAC-protokol. Resultaterne viser en markant forbedring i forhold til den eksisterende løsning. Vi undersøger også ydeevnen under varierende parametre: antal mobile enheder, klyngers rækkevidde og perioder (hvor langt klynger rækker, og hvor ofte de opdateres), samarbejdsstrategier og mobilitet.
Battery life is critical to how well wireless devices work during mobile use. One way to save energy is for devices to cooperate, which can lower overall energy consumption. In idealized settings with no MAC layer (Medium Access Control) or no collisions (when devices transmit at the same time), cooperation has been shown to reduce energy use. In practice, an existing MAC protocol can worsen performance, so a better scheme is needed for cooperative networks. This thesis proposes a new MAC scheme to address energy consumption in cooperative wireless networks. We evaluate it through simulations with a cooperative network model and compare it with an ideal system and with an existing MAC protocol. The results show a significant improvement over the existing system. We also examine performance under varying parameters: number of mobile devices, cluster ranges and periods (how far clusters extend and how often they are updated), cooperation strategies, and mobility.
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