We implemented low-level traffic version of Scaleable Reliable Multicast tool -used in the Network Text Editor (NTE); [M. Handley et al: Network Text Editor, To be presented in SIGCOM ?97].
We have developed B-MART - a bulk transfer multicast protocol, being proposed for pre-loading web mirror sites, and VRML world databases. We have made both an implementation and simulations. [Vicisano et al: One-to-Many Reliable Bulk-Data Transfer in the Mbone, Third International Workshop on High Performance Protocol Architectures HIPPARCH '97 Uppsala, Sweden, June 12-13, 1997]
We completed the Session Directory, and Invitation protocols without the incorporation of security, together with releases of implementations. [M. Handley: Session Invitation Protocol, Internet Drafts draft-ietf-mmusic-sap-sec-01.txt ; M. Handley: Session Directory Announcement Protocol, draft-ietf-mmusic-sap-sec-02.txt] We completed a second draft of the Session Directory Security Addendum, which included mechanisms for using both symmetric and public key encryption for authenticating and making private announcements. We released an early implementation with symmetric encryption. [P Kirstein et al.: Specification of Security in SAP Using Public Key Algorithms, Internet Drafts draft-ietf-mmusic-sap-sec-01.txt.]
We have released a first version of a filtering and transcoding gateway. This includes audio mixing, video switching, transcoding of audio (with redundancy against loss). The current version does not include stream synchronisation, but does allow support for lower bandwidth links (hence the functionality provided); this makes it suitable for providing access to ISDN and mobile users. [ P. Kirstein et R. Bennett: Recent Activities in the MERCI Conferencing Project, Proc. JENC 8, Edinburgh, May 12-16, 1997]
We have brought into service the direct ATM link between UCL and CAIRN with the CAIRN routing software. This allows both much closer Audio and Video Personal collaboration, and direct experimental collaboration with the other DARPA researchers on complementary activities.
RP/Core placement
QoS Multicast forwarding implementation
Add stream synchronisation, configurability, conference bus, integration with SDR, security to the filtering/transcoding gateway.
Add stream synchronisation, ability to playback WB and NTE data from Multimedia Server. Add RSTP support to server.
Complete standard and implementation of privacy enhancements to Session Announcements and Invitations.
Experiment over CAIRN with our multimedia tools over the enhanced transport systems.