Next generation protocol for P2P SIP communication

Abstract

Session initiation protocol (SIP) is a well-known protocol that is used to provide voice over IP (VoIP) signaling and multimedia services in today's evolving Internet. With the popularity of peer-to-peer (P2P) system, it is envisioned to use SIP in P2P networks, to increase the communication flexibility without a centralized organization and control. The REsource LOcation And Discovery (RELOAD) protocol is used to facilitate SIP signaling in the P2P overlay network. RELOAD with interactive connectivity establishment (ICE) functionality in P2P SIP is used to improve the performance of the SIP under varying network conditions. The aim of this paper is to examine the ICE working mechanism in P2P SIP and explain the operational functionality of ICE in a P2P SIP overlay networking environment. Also, this paper discusses different working methods, challenges and problems that are used by the RELOAD protocol for establishing peer-to-peer SIP connections.