International Business Machines Corporation

Asaf Ben-Ezra

Asaf Zinger

Ofira Tal-Aviv

Haim Schneider

Olga Berezin

Uri Segev

Brian L Pulito

Nitzan Nissim

Scott W Graham

Joseph E Bergmark

Yulia Kantarovich

A system for eliminating redundant notifications to SIP/SIMPLE subscribers, the system including a notification fingerprinter configured to generate a fingerprint from the contents of a SIP/SIMPLE subscriber notification using a predefined fingerprinting method, a fingerprint comparator configured to compare a fingerprint of a previously-sent notification with a fingerprint of a waiting-to-be-sent notification, and a server configured to send the waiting-to-be-sent notification to the subscriber only if the fingerprints do not match.

Eliminating redundant notifications to SIP/SIMPLE subscribers

Eliminating redundant notifications to SIP/simple subscribers

According to one embodiment of the present invention, a system for providing call signaling services to client devices transmits a start channel message on a service topic from a first client device to a service instance. The system publishes from the service instance to the client devices a channel message including a channel topic. The service instance subscribes to the service topic and an associated channel topic. Each client device subscribes to a corresponding client topic. The system transfers signaling information between the client devices and the service instance by publishing signaling information to a channel topic and client topics to establish a communication Channel between the client devices. The system communicates between the client devices by publishing information over the communication channel. Embodiments of the present invention further include a method and computer program product for providing call signaling services in substantially the same manners described above.

Messaging based signaling for communications sessions

According to one embodiment of the present invention, a system for providing call signaling services to client devices transmits a start channel message on a service topic from a first client device to a service instance. The system publishes from the service instance to the client devices a channel message including a channel topic. The service instance subscribes to the service topic and an associated channel topic. Each client device subscribes to a corresponding client topic. The system transfers signaling information between the client devices and the service instance by publishing signaling information to a channel topic and client topics to establish a communication channel between the client devices. The system communicates between the client devices by publishing information over the communication channel. Embodiments of the present invention further include a method and computer program product for providing call signaling services in substantially the same manners described above.

A method, system and computer program product for optimized cooperation between resource list servers and presence servers. The method including receiving a subscription request from a watcher, where the subscription request identifies a resource list and is a request to receive presence information regarding each of a plurality of presentities listed on the resource list, and generating a subscription request to a presence server for presence information regarding any presentity listed on the resource list only if no other currently-active subscription request is known by the resource list server to exist for presence information regarding the presentity.

Optimized cooperation between resource list servers and presence servers

A method for evaluating authorization rules, the method including evaluating a plurality of authorization rules in connection with an authorization process for a subject, storing in a computer-readable storage medium and in association with the subject a rule identifier of any of the rules that are applicable to the subject, and performing, in connection with a subsequent authorization process for the subject, a computer-based action indicated by any of the rules identified by any of the stored rule identifiers, where the performing step is performed independent from an evaluation of the applicability of any of the authorization rules in connection with the subsequent authorization process.

Accelerated reevaluation of authorization rules

A system for assigned resource management, including multiple computer servers, each identifiable by an identifier, and a resource table stored on a computer-readable data storage medium and accessible to any of the servers, where any of the servers is configured to establish itself as manager for a resource, if no record in the resource table indicates that a manager exists for the resource, by including its identifier in a record in the resource table for the resource in a manner that indicates that the server is manager for the resource, where any of the servers is configured to include its identifier in a list of servers in the record for the resource that wish to participate in the performance by the manager of at least one action regarding the resource, and where the manager is configured to perform the action regarding the resource.

Common resource management in a server cluster

A system for managing watcher information in a distributed server environment, including a watcher information database configured to store records, any of the records populated by a watcher identifier, a presentity identifier, a list of unique identifiers of a plurality of subscriptions by the watcher, a watcher state field indicating a current state of the watcher, and an event field indicating an event that last caused the state of the watcher to change, each record representing a different pair of a watcher and a presentity pair, and where each of the records maintains a single state for one or more subscriptions by a watcher to receive presence information regarding a presentity, and a plurality of presence servers, where each of the presence servers is configured to modify any of the records to reflect the current state of a watcher for any subscription indicated in the record.

Growing community of inventors

Acco, Israel

Asaf Ben-Ezra