Abstract: Telecommunication networks and the Internet are growing together.
Peer-to-Peer (P2P) services which are originally offered by network providers,
like telephony and messaging, are provided through VoIP and Instant Messaging
(IM) by Internet service providers, too. The IP Multimedia Subsystem (IMS) is
the answer of the telecommunication industry to this trend and aims at
providing Internet P2P and multimedia services controlled by the network
operators. The IMS provides mobility and session management as well as message
routing, security, and billing. This article is a comprehensive version of a conference publication [1] and introduces a Mobile P2P Web Services
framework which enables the creation of arbitrary P2P application on mobile
devices within the IMS. The terminals are sharing and publishing a Web
Service interface, which provides the capability of coupling arbitrary
applications using Web Service technologies and the support of the {IMS}
infrastructure. The concept, the necessary Web Service adaptations, and
extension as well as the interworking of Web Services, {IMS} nodes, and
protocols are described and proofed by an exemplary mobile chess game
application. In addition, the performance of mobile P2P Web Services is
evaluated by means of an analytical analysis.
Keywords: Mobile Web Services, IMS, SIP, SOAP, mobile P2P
