Abstract: Nodes acting as the resource providers or customers will play different roles in a single auction of the combinatorial double auction sessions or entities．Regarding this,we proposed a mixed combination double auction scheme which enables a node to be not only a resource provider but a customer．Under such a context we further adopted the so called credit mechanism into our resource allocation scheme,due to its positive effect on resource allocation security and quality of service．Specifically,we used trust as a parameter to determine and adjust the price of the resource,and further derived the optimal resource allocation scheme．The simulation results show that proposed algorithm can outperform previous methods in preventing malicious nodes,as well as improving the transaction rate and transaction’s positive incentive auction efficiency.

Key words: Grid,Resource allocation,Mixed combination,Combinatorial double auction,Trust