Cooperative packet delivery in hybrid wireless mobile networks a coalitional game approach
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The document proposes a solution for cooperative packet delivery in hybrid wireless mobile networks using a coalitional game-theoretic approach. Mobile nodes can form coalitions to cooperatively deliver packets to each other. A coalitional game model analyzes nodes' incentives to join or leave coalitions based on payoffs from delivery costs and delays. Markov chain and bargaining models determine payoffs given probabilities that nodes help each other. The solution provides stable coalitions that maximize nodes' utilities compared to acting alone.
Cooperative packet delivery in hybrid wireless mobile networks a coalitional game approach
- 1. Cooperative Packet Delivery in Hybrid Wireless Mobile Networks: A Coalitional Game Approach ABSTRACT: We consider the problem of cooperative packet delivery to mobile nodes in a hybrid wireless mobile network, where both infrastructure-based and infrastructure-less (i.e., ad hoc mode or peer-to-peer mode) communications are used. We propose a solution based on a coalition formation among mobile nodes to cooperatively deliver packets among these mobile nodes in the same coalition. A coalitional game is developed to analyze the behavior of the rational mobile nodes for cooperative packet delivery. A group of mobile nodes makes a decision to join or to leave a coalition based on their individual payoffs. The individual payoff of each mobile node is a function of the average delivery delay for packets transmitted to the mobile node from a base station and the cost incurred by this mobile node for relaying packets to other mobile nodes. To find the payoff of each mobile node, a Markov chain model is formulated and the expected cost and packet delivery delay are obtained when the mobile node is in a coalition. Since both the expected cost and packet delivery delay depend on the probability that each mobile node will help other mobile nodes in the same coalition to forward packets to the destination mobile node in the same coalition, a bargaining game is used to find the optimal helping probabilities. After the payoff of each mobile node
- 2. is obtained, we find the solutions of the coalitional game which are the stable coalitions. A distributed algorithm is presented to obtain the stable coalitions and a Markov-chain-based analysis is used to evaluate the stable coalitional structures obtained from the distributed algorithm. Performance evaluation results show that when the stable coalitions are formed, the mobile nodes achieve a nonzero payoff (i.e., utility is higher than the cost). With a coalition formation, the mobile nodes achieve higher payoff than that when each mobile node acts alone. EXISTING SYSTEM: A few works in the literature proposed communication models for wireless networks with relay-based schemes to reduce the delay of data delivery. In these schemes, mobile nodes in a group (i.e., cluster) cooperatively deliver data packets among each other. However, the key assumption here is that the mobile nodes in the same group always help each other for data delivery. Since a tradeoff exists between performance improvement (i.e., smaller packet delivery delay) and transmission cost (i.e., bandwidth and energy-consumption) for such cooperative data delivery, this assumption may not be always true. For example, when a mobile node has limited transmission bandwidth and is of self-interest, it may not join a group for cooperative data delivery.
- 3. DISADVANTAGES OF EXISTING SYSTEM: Since a tradeoff exists between performance improvement (i.e., smaller packet delivery delay) and transmission cost (i.e., bandwidth and energy-consumption) for such cooperative data delivery, this assumption may not be always true. For example, when a mobile node has limited transmission bandwidth and is of self- interest, it may not join a group for cooperative data delivery. In this context, the theory of coalitional game can be applied to analyze the dynamics of coalition (or group) formation among mobile nodes. PROPOSED SYSTEM: The proposed scheme consists of three interrelated steps are included in this paper. We first use a social network analysis (SNA)-based approach to identify which mobile nodes have the potential to help other mobile nodes for data delivery in the same group or coalition. After the SNA based mobile node grouping is done, the mobile nodes in each group play a coalitional game to obtain a stable coalitional structure. The payoff of each mobile node is a function of cost incurred by the mobile node in relaying packets and the delivery delay for packets transmitted to this mobile node from a BS. A continuous-time Markov chain (CTMC) model is formulated to obtain the expected cost and packet delivery delay for each mobile node in the same coalition. Since the expected cost and packet delivery delay vary with the probability that each mobile node helps other mobile nodes deliver
- 4. packets, a bargaining game is used to find the optimal helping probabilities for all the mobile nodes in a coalition. For each mobile node, after the optimal probability of helping other mobile nodes is obtained, we can determine the payoff of each mobile node when it is a member of its current coalition. The payoffs obtained from the bargaining game are used to determine the solution of the coalitional game in terms of stable coalitional structure (i.e., a group of stable coalitions). A distributed algorithm is used to obtain the solution of the coalitional game and a Markov chain-based analysis is presented to evaluate the stable coalitional structures obtained from the distributed algorithm. ADVANTAGES OF PROPOSED SYSTEM: The proposed framework will be useful for supporting various mobile applications based on distributed cooperative packet delivery. In a mobile nodes (e.g., vehicular users) form coalitions and cooperatively share the limited bandwidth of vehicle-to-roadside links to achieve high spectrum utilization.
- 5. SYSTEM ARCHITECTURE: SYSTEM REQUIREMENTS: HARDWARE REQUIREMENTS: System : Pentium IV 2.4 GHz. Hard Disk : 40 GB. Monitor : 15 inch VGA Colour. Mouse : Logitech Mouse. Ram : 512 MB
- 6. Keyboard : Standard Keyboard SOFTWARE REQUIREMENTS: Operating System : Windows XP. Coding Language : ASP.NET, C#.Net. Database : SQL Server 2005 REFERENCE: Khajonpong Akkarajitsakul,Member, IEEE, Ekram Hossain,Senior Member, IEEE, and Dusit Niyato, Member, IEEE “Cooperative Packet Delivery in Hybrid Wireless Mobile Networks: A Coalitional Game Approach” - IEEE TRANSACTIONS ON MOBILE COMPUTING, VOL. 12, NO. 5, MAY 2013.