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A method and application architecture are proposed for improving the sharing of presence and other information between mobile clients and enterprise servers by determining, in a hybrid peer-topeer (P2P) network based on logical proximity, when a mobile client should share data with other peers in a group, instead of transmitting data to the servers. A "gateway-peer" is responsible for determining when to share data with peers within the group and when to transmit data to the servers. The mobile client shares data with other peers when a particular peer's presence status has changed and transmits data, via a gateway-peer, to the enterprise servers when the overall group's presence has changed. Our method aggregates presence and routes communications via hybrid P2P networking, thus reducing the load on enterprise servers, lessening the occurrences of single points-of-failure and improving the system scalability. A prototype system and a usecase scenario are described to illustrate our design concepts.

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