Trust state perceiving mixed service discovery method

Abstract

The invention discloses a trust state perceiving mixed service discovery method. Conventional mixed service discovery mechanisms have no consideration on node non-cooperative action in VDN selection, service information forwarding and service selection, so that service discovery success rate is reduced, and resource is greatly wasted; meanwhile, the conventional mixed service discovery mechanisms have no consideration on node social properties, so that the service information is difficult to accurately arrive to a destination node, and network loading ratio is relatively high; the discovery method fulfils detection of a network structure by perceiving relationship strength between adjacent nodes and among the nodes based on full consideration of node social properties; meanwhile, node trust degree is calculated based on historical information and an intrusion detection mechanism; an appropriate service node is selected to realize a service discovery process by adopting node activity degree and trust degree as parameters; the design method can reduce network loading and time delay of the service discovery process while ensuring service discovery success rate, and achieves the goal of promoting network resource utilization rate and user experience quality.

Description

technical field [0001] The invention relates to an intermittently connected wireless network service discovery mechanism technology, in particular to the design of a trust state-aware hybrid service discovery mechanism. Background technique [0002] Different from the service discovery mechanism of traditional mobile ad-hoc networks, nodes in discontinuously connected wireless networks have weak functions, poor reliability, strong network dynamics, and limited resources. Nodes need to realize service information registration and service information query at a lower storage cost and service information, so when designing a service discovery mechanism, it is necessary to fully consider the characteristics of the network and the node itself. In various application fields of discontinuously connected wireless networks, in order to provide customers with uninterrupted and seamless mobile services, customers need to perform service discovery, that is, they can use different mobile...

AI Technical Summary

Problems solved by technology

In addition, due to limited resources (cache, energy, bandwidth, etc.) and privacy protection, nodes composed of devices carried by rational entities often exhibit non-cooperative behavior. The non-cooperative behavior of nodes is manifested in the fact that nodes only try to forward and have a strong relationship with themselves. The data generated by the nodes, even providing false service information or destroying the normal transmission of service information, the non-cooperative behavior of nodes will greatly reduce the availability of the network

However, the existing hybrid service discovery mechanisms do not consider the social attributes of nodes, making it difficult for service information to reach the destination node in a timely and accurate manner, and at the same time, it does not solve the problem that the success rate of service discovery decreases due to non-cooperative behavior of nodes.

At present, the hybrid service discovery mechanism in discontinuously connected wireless networks does not consider the social relationship and trust status between nodes, and does not consider the social relationship between nodes when dividing the network, making the social relationship of nodes in each sub-area unstable; Node activity and trust, so that the service registration information may be registered to a node with low activity or non-cooperation, resulting in the failure of service information registration; when selecting a service information relay node, no node social relationship and trust are considered, resulting in service information Forwarding delay and large network load or transmission failure due to non-cooperative behavior of nodes

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