Google Inc.

Björn Kempén

Benjamin David Eidelson

Peter Michal Pawlowski

Jonas Erik Lindberg

Per Johan Gustafsson

Heradon Douglas

Systems, methods and computer readable media for persistent conversations are described. In some implementations, a method can include receiving a communication message sent from a first user to at least one other user and generating a persistent conversation object having a conversation content section and conversation state information. The method can also include storing the communication message in the conversation content section of the persistent conversation object and forwarding the communication message to the at least one other user. The method can further include updating the conversation state information to reflect the receiving, storing and forwarding of the communication message.

Integrating communication modes in persistent conversations

Described herein are devices and techniques for automatically determining in a presence-enabled messaging service, the presence status of at least one subscriber identified in a user's list of user contacts, and for filtering subsequent transmission of related network messages (packets) responsive to each user contact's presence status. In preparation for the real-time text exchange between such messaging (e.g., IM or chat) subscribers, an initializing user requests presence status for all user contacts. An association of presence status formed in response to replies to the user probe. Such associations can be stored as a data structure, such as a Bloom filter, a hash table, a list, or the like. Subsequent presence messages (e.g., broadcasts, probes) from the initialized user are filtered, in response to the associated contact status. For example, subsequent presence messages are only sent to those user contacts believed to be online.

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Stockholm, Sweden

Björn Kempén