Session Initiation Protocol (SIP) Back-to-Back User Agents (B2BUAs) exist on the signaling and media paths between the endpoints. This document describes the behavior of B2BUAs when Secure Real-time Transport (SRTP) security context is set up with the Datagram Transport Layer Security (DTLS) protocol.

Group services like the audioconference require a minimum level of quality of service for the adequate transmission of multimedia packets, and the improvement of signaling processes for the establishment, maintenance and release of multicast group sessions. Traditionally, the SIP (Session Initiation Protocol) servers have dealt with unicast signaling and complementary support IP (Internet Proto...

For a mobile node that uses both Mobile IP and Session Initiation Protocol (SIP), there is severe redundant registration overhead because the mobile node has to make location registration separately to the Home Agent for Mobile IP and to the Home Registrar for SIP. Therefore, we propose two new IP mobility management methods that integrate both Mobile IP and SIP. Performance comparisons are mad...

Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies to delivery of voice communications over IP networks such as the Internet or other packet-switched networks. VoIP systems employ session control protocols to control the set-up and tear-down of calls as well as audio codecs which encode speech allowing transmission over an IP network as digital audio...

This paper presents a new service delivery and provisioning architecture for home appliances. The basic idea is to subtly incorporate SIP (Session Initiation Protocol) Internet telephony signalling architecture into the OSGi (Open Service Gateway Initiative) service delivery and provisioning framework. Thus the strengths of OSGi and SIP are unified so that wide range of services and devices can...

This document presents an extension to the Session Initiation Protocol (SIP)-Specific Event Notification mechanism for subscribing to a homogeneous list of resources. Instead of the subscriber sending a SUBSCRIBE for each resource individually, the subscriber can subscribe to an entire list, and then receive notifications when the state of any of the resources in the list changes. Roach, et al....

This document presents an extension to the Session Initiation Protocol (SIP)-Specific Event Notification mechanism for subscribing to a homogenous collection of event packages. Instead of the subscriber sending a SUBSCRIBE for each resource individually, the subscriber can subscribe to an entire collection, and then receive notifications when the state of any of the resources in the collection ...

This document presents an extension to the Session Initiation Protocol (SIP)-Specific Event Notification mechanism for subscribing to a homogeneous list of resources. Instead of the subscriber sending a SUBSCRIBE for each resource individually, the subscriber can subscribe to an entire list, and then receive notifications when the state of any of the resources in the list changes. Roach, et al....

The Session Initiation Protocol (SIP) is a signalling protocol developed to set up, modify and tear down multimedia sessions such as voice and video calls, game sessions, messages exchange and the like over the Internet Protocol (IP). A few of protocols have been design for it. However, the SIP seems to be the most relevant protocol with the future. That’s all thanks to its manifold features. O...