A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks[omnet++program]

A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks

Currently, the mobile devices, e.g., smart phones and PDAs are becoming ever-increasinglypowerful, and bring us more and more convenience. A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks With the growing popularity ofthese powerful smart mobile device’,.A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks[omnet++program]A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks their connection with each other are increasingly important. Mobile devices can constitute a Mobile Ad Hoc Networks MANET

throughblue-tooth or Wi-Fi. MANET is a multi-hop, self-organized wireless network, and it can be composed of mobile devices, such as mobile phones, PDAs. These mobile devices act as nodes. In the MANET, if a node is in the transmission range of other nodes, these nodes can communicate with each other. A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks Services are provided by these nodes, and service composition can be conducted by the cooperation of them. By employing the Service-Oriented Architecture SOA technology, the services provided by heterogeneous platforms can be seamlessly integrated or composed mashup .

 

A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks

 

Different from the wired networks, A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks the topology of mobile ad hoc networks is time-varying . The mobile terminal device node is also different from the terminal in the wired networks. Some physical properties of the mobile devices may subject to change, such as speed, A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks direction, and location. Furthermore, nodes may fail at any time, so the services which the nodes provided are unavailable. A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks These features bring great challenges to the services composition in the MANET. For example, in a subway, A Composite Service Provision Method Based on Novel Node Model in Mobile Ad Hoc Networks mobile devices

 

: Composite service provision in mobile ad hoc networks encounters great challenges and its success rate is not satisfactorybecause the nodes’ locations are dynamic and the nodes maybe unavailable at any time. Composite service is built through the service composition. In mobile ad hoc networks, the factors influencing the success rate of service composition are mainly the number of nodes and the time spent for the composition. The node’s failure probability is proportional to the length of time the node exist in the networks. In order to improve the success rate of service composition, we take several measures. First, we split the servicerequirement into several segments and cluster the nodes, so that the nodes’ waiting time for service composition can be reduced. Second, we propose a new node model of “one node contains multiple services” in mobile ad hoc networks. Using this type of nodes model, the number of nodes required for servicecomposition can be reduced. These means can increase the success rate of service composition. carried by passengers form a mobile ad hoc network. A passenger proposes a requirementof service composition including 10 services s0, s1, s2, … s9 , which exist in the passengers’ mobile devices. Here, the requirement of service composition means which services arerequired by a passenger to complete a task.The requirement is sponsored by the passenger who wants to do the task. Assuming that the services are executed according to their sequence from s0, s1, s2, … to s9 , and the services s0, s1, … s6 have been executed successfully. When the service s7 is being executed, the subway stops. Some passengers get off the subway, and the nodes which provide.