Microsoft Technology Licensing, LLC

Ann Demirtjis

Nikhil P Bobde

Jeremy Thomas Buch

David J Simons

Vishwajith Kumbalimutt

Ajay P Chitturi

Zachary Taylor

Mu Han

Robert I Brown

Mark T Jeffrey

A method and system for aggregating presence information generated by multiple devices associated with a single user is presented. A server acting as a presence agent on behalf of a first user and the first user's computing device receives and responds to a subscription request generated by a computing device operated by a second user that wishes to be permitted as a watcher of the first user. If the server is not capable of acting as a presence agent, then the first user's computing device assumes the role of a presence agent.

Method and system for supporting the communication of presence information among computing devices of a network

A method and system is provided to integrate the Kerberos security mechanism into the message flow of the signaling operation under the Session Initiation Protocol to allow a SIP client and a SIP proxy to authenticate each other. When the SIP proxy receives an request message, such an INVITE request, from the SIP client, it responds with a challenge message indicating that authentication based on Kerberos is required. In response, the SIP client sends a second request message with a proxy authorization header containing authentication data, including a Kerberos server ticket for the Proxy, to allow the proxy to authenticate the client's user.

Method and system for integrating security mechanisms into session initiation protocol request messages for client-proxy authentication

A system for detecting and communicating the presence of one or more computing devices is presented. The invention also presents a method and system for aggregating presence information generated by multiple devices associated with a single user. A server acting as a presence agent on behalf of a first user receives and responds to a subscription request generated by a computing device operated by a second wishing to be permitted as a watcher of the first user. When the second user corresponds to access preferences of the first user, a notify message is sent to the second user's device that includes presence information indicative of an activity level and availability level associated with the first user. When the first user employs multiple computing devices, the server generates an aggregate presence document that is representative of the overall presence of the first user.

Method and system for supporting the communication of presence information regarding one or more telephony devices

A login architecture for a computer to access an external network, such as the Internet, through a cable network provides session-based connection to the external computer network. The home computer is first assigned a restricted network address by the cable network. With the restricted network address, the user may access a &ldquo;walled garden&rdquo; of the cable network, but cannot access the external computer network. To access the external computer network, a session-based connection, such as a &ldquo;tunnel&rdquo; under the Point-to-Point Tunneling Protocol, is formed between the home computer and a connection server of the cable network, and the user is authenticated over the session-based connection. A second network address usable for accessing the external network is then assigned to the home computer. The home computer sends network communication packets using the public network address through the session-based connection to the connection provider, which forwards the communication packets to the external computer network. The login architecture may be implemented to provide connection to the external network on a per-user account basis or on a home account basis. In the case whether the external network is the Internet, a selection of Internet service providers (ISPs) for Internet access through the cable network is provided by using multiple connection servers connected to different ISPs.

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Redmond, WA, United States of America

Ann Demirtjis