Abstract:

The existing P2P network service discovery algorithms are lack of service quality assurance consideration, and cannot fully utilize the specific service quality attributes of some nodes in the networks. In order to improve the efficiency of P2P networks service discovery, this paper proposed a P2P service discovery algorithm based on QoS by combining QoS attributes and P2P characteristics. we first defined description of P2P service based on QoS and introduces semantic information into the service description in order to improve the accuracy of service matching. On this basis, we built up the P2P service discovery model with QoS guarantees and provided a genetic algorithm for P2P service discovery. At last, the feasibility and effectiveness of the service discovery algorithm was performed through the experiments.

Key words: QoS;P2P;service;service discovery;genetic algorithm