Performance Improvement in Web Services Discovery for Mobile Networks

Abstract

Service-Oriented Architecture (SOA) provides a scalable and interoperable paradigm for organizing distributed resources. In general, the SOA is implemented by Web services, and discovery service is the fundamental process of services engagement in Web services. However, a centralized architecture for Web services discovery, such as Universal Description and Discovery Integration (UDDI), goes through the single node of failure and scalability problem. Otherwise, the existing peer-to-peer architectures, such as Gnutella-based or Distributed Hash Table-based, were suffered from larger delay due to multi hops delivery in mobile networks especially. In this paper, an improving Web services discovery in mobile networks is proposed, which is a decentralized and adaptive service discovery with enhancement of matching capability. The architecture adopts a distributed index system with support of Pastry overlay networks for services discovery. The keyword query for semantic search in peer-to-peer network is supported in the proposed architecture as well. Furthermore, the routing procedure and leaf set of Pastry is adopted to reduce delay in mobile networks. The simulation show that our proposed solution is scalable and improved the performance up to 67.85% compare to Chord-based solutions in mobile networks.