Piotr Boni

Presence Traffic Optimization Techniques

With the growth of presence-based services, it is important to provision the network to support high traffic and load generated by presence services. Presence event distribution systems amplify a single incoming PUBLISH message into possibly numerous outgoing NOTIFY messages from the server. This can increase the network load on inter-domain links and can potentially disrupt other QoS-sensitive applications. In this document, we present existing as well as new techniques that can be used to reduce presence traffic both in inter-domain and intra-domain scenarios. Specifically, we propose two new techniques: sending common NOTIFY for multiple watchers and batched notifications. We also propose some generic heuristics that can be used to reduce network traffic due to presence.

Using IM and SMS for emergency text communications

Currently, text communication cannot be used to ask for help in emergency situations. Even in the Next Generation 9-1-1 system, an IP/SIP-based emergency communication system, there has been no investigation into how text communications such as Instant Messaging (IM) and Short Message Service (SMS) can be integrated. We identify the technical challenges in the integration of IM and SMS networks with the NG9-1-1 system, and propose a solution for each challenge. We also describe a working prototype system using our approach.

A new SIP event package for group membership management in advanced communications

In real life, we often care about the membership in groups but may only know the identity of the group, rather than its members. This paper proposes and describes a new SIP membership event package, which deals with dynamic groups of event-generating entities. We present the event package concepts and show its usefulness in several application examples. The package allows tracking changes in membership in groups. Groups can represent entities contained within a physical space, such as a room or vehicle, or a logical group of entities, such as a call center team. Each member of a group can support a different set of event packages. Tracking membership of entities with different event packages allows deriving presence information from these event packages.