USING PRESENCE PROXIES TO CONSTRAIN LOCAL PRESENCE INFORMATION TO A SUB-NETWORK WHILE USING A PRESENCE SERVER EXTERNAL TO THE SUB-NETWORK TO HANDLE OTHER PRESENCE INFORMATION

摘要

The present invention discloses a solution that uses presence proxies to handle local presence information while using a presence server to handle extra-local presence information. In the invention, a computing system can include multiple presence user agents (PUAs), multiple watchers, multiple presence proxies, and a presence server. The PUAs can be are grouped into two or more sub-networks. The watchers can also be grouped by sub-network. The PUAs and the watchers can each be associated with a presentity. A presence proxy can be associated with each of the sub-networks. Exclusively local presence services for each sub-network ears be handled by the associated presence proxy. The presence proxy can route presence information for other presence services (those not exclusively local) to and from the presence server.