"An Extensible Markup Language (XML) Document Format for Indicating A Change in XML Configuration Access Protocol (XCAP) Resources", Jonathan Rosenberg, Jari Urpalainen, 30-Jun-09. ( bytes)

This specification defines a document format that can be used to indicate that a change has occurred in a document managed by the Extensible Markup Language (XML) Configuration Access Protocol (XCAP). This format indicates the document that has changed and its former and new entity tags. It also can indicate the specific change that was made in the document, using an XML patch format. This format allows also indications of element and attribute content of an XML document. XCAP diff documents can be delivered to clients using a number of means, including a Session Initiation Protocol (SIP) event package.

"Presence Interdomain Scaling Analysis for SIP/SIMPLE", Avshalom Houri, Edwin Aoki, Sriram Parameswar, Tim Rang, Vishal Singh, Henning Schulzrinne, 23-Jun-09. ( bytes)

The document analyzes the traffic that is generated due to presence subscriptions between domains. It is shown that the amount of traffic can be extremely big. In addition to the very large traffic the document also analyzes the affects of a large presence system on the memory footprint and the CPU load. Current approved and in work optimizations to the SIP protocol are analyzed with the possible impact on the load. Separate documents contain the requirements for optimizations and suggestions for new optimizations.

"Multi-party Chat Using the Message Session Relay Protocol (MSRP)", Aki Niemi, Miguel Garcia, Geir Arne Sandbakken, 9-Mar-09. ( bytes)

The Message Session Relay Protocol (MSRP) defines a mechanism for sending instant messages within a peer-to-peer session, negotiated using the Session Initiation Protocol (SIP) and the Session Description Protocol (SDP). This document defines the necessary tools for establishing multi-party chat sessions, or chat rooms, using MSRP.

"SIMPLE made Simple: An Overview of the IETF Specifications for Instant Messaging and Presence using the Session Initiation Protocol (SIP)", Jonathan Rosenberg, 9-Mar-09. ( bytes)

The IETF has produced many specifications related to Presence and Instant Messaging with the Session Initiation Protocol (SIP). Collectively, these specifications are known as SIMPLE - SIP for Instant Messaging and Presence Leveraging Extensions. This document serves as a guide to the SIMPLE suite of specifications. It breaks them up into categories and explains what each is for and how they relate to each other.

"Models for Intra-Domain Presence and Instant Messaging (IM) Bridging", Jonathan Rosenberg, Avshalom Houri, Colm Smyth, Francois Audet, 9-Mar-09. ( bytes)

Presence and Instant Messaging (IM) bridging involves the sharing of presence information and exchange of IM across multiple systems within a single domain. As such, it is a close cousin to presence and IM federation, which involves the sharing of presence and IM across differing domains. Presence and IM bridging can be the result of a multi-vendor network, or a consequence of a large organization that requires partitioning. This document examines different use cases and models for intra-domain presence and IM bridging. It is meant to provide a framework for defining requirements and specifications for presence and IM bridging.

"An Alternative Connection Model for the Message Session Relay Protocol (MSRP)", Christer Holmberg, Staffan Blau, 30-Jan-09. ( bytes)

This document defines an alternative connection model for MSRP UAs. The model differs from the standard MSRP model, as defined in RFC4975 and RFC4976 in the following ways: it uses COMEDIA for TCP connection establishment, and it allows the usage of SDP in a more conventional way for conveying endpoint address information. Because of this, the model also allows for the usage of generic mainstream mechanisms for NAT traversal, instead of using MSRP relays.

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