General Instrument Corporation

Motorola Corporation

Jeffrey T Eschbach

Senaka Balasuriya

Aaron M Smith

Jie Weng

Gregory W Cox

Walter F Johnson

Kabe Vanderbaan

Jayanth P Mysore

Frederick H Rohles

Session Inter-Device (SID) mobility networks () are described in which a seamless transfer of a communication session from a first device () to a second device () can be achieved without interrupting the active session. According to the SID mobility network (), the transfer can be accomplished by transferring away from the Transferring Node or first device () the IP address associated with the active session () so that the network () will route the session to the desired Target Node or second device (). The Transferring Node () transfers its IP address () to the Agent () and stops requesting data packets addressed to its IP address (). The Agent () then begins to request and eventually receive the packets addressed to the Transferring Node's IP address (). The Agent () then transfers the packets to the Target Node (). In an alternate SID mobility network (), the Transferring Node () transfers a session specific IP address () to the Agent (). The Agent () then transfers packets sent to the session specific IP address () to the Target Node (). In another SID mobility network (), the Transferring Node () obtains a temporary IP address () and transfers its IP address () to a Session Agent (). The Session Agent () begins to request and eventually receive the packets addressed to the Transferring Node's IP address (164), and for each received packet determines if it belongs to the session the Transferring Node () requested to transfer to the Target Node (). If it does, the Session Agent () will transfer the packet to the Target Node () at the Target Node's IP address (). If it does not, the Session Agent () will transfer the packet to the Transferring Node () at its temporary IP address (). In each SID mobility network, the session with respect to the Correspondent Node continues without interruption throughout the transfer, thereby providing a seamless transfer of the session from a first device to a second device.

Method and apparatus for transferring a communicaton session

A controller () registers () a first number of channels; registers () a first number of clients (); determines () a set of client groups a set of client groups and categorizing the registered clients into the client groups; and for each client group in the set, assigns () a corresponding subset of the registered channels; and communicates () the corresponding subset to each registered client therein. A RCD () registers () with the controller (); and receives () a subset of the registered channels, the subset corresponding to a client group. In this manner, a RCD discovers a subset of channels in a network () to which it can subscribe that is appropriate for its resources and/or capabilities.

Selectively receiving data in a multicast environment

In the present technique of push to talk communications system, a push to talk audio data message is translated to text data to provide for a translated text data message. The push to talk audio data message is then associated with the corresponding translated text data message to provide for an association of the audio and text messages. The translated text data message is accordingly sent to one or more destinations.

Methods and apparatus for providing push to talk text data

A communication system () includes a first communication unit () capable of communicating over a full-duplex persistent-connection link provided by a full-duplex network () and a second communication unit () capable of communicating over a half-duplex dispatch link provided by a dispatch RF system (). The system () also includes a dispatch gateway (). The dispatch gateway () receives signals from a first communication unit () over a full-duplex persistent link through a full-duplex network () and provides communication between the first communication unit and a single dispatch communication unit () or a group of dispatch communication units () over a half-duplex communication link through a dispatch RF system (). The gateway operates in a manner so as to permit communication between full-duplex terminals () and half-duplex terminals ().

Method and apparatus for interactive communication between half-duplex and full-duplex systems

Session Inter-Device (SID) mobility networks () are described in which a seamless transfer of a communication session from a first device () to a second device () can be achieved without interrupting the active session. According to the SID mobility network (), the transfer can be accomplished by transferring away from the Transferring Node or first device () the IP address associated with the active session () so that the network () will route the session to the desired Target Node or second device (). The Transferring Node () transfers its IP address () to the Agent () and stops requesting data packets addressed to its IP address (). The Agent () then begins to request and eventually receive the packets addressed to the Transferring Node's IP address (). The Agent () then transfers the packets to the Target Node (). In an alternate SID mobility network (), the Transferring Node () transfers a session specific IP address () to the Agent (). The Agent () then transfers packets sent to the session specific IP address () to the Target Node (). In another SID mobility network (), the Transferring Node () obtains a temporary IP address () and transfers its IP address () to a Session Agent (). The Session Agent () begins to request and eventually receive the packets addressed to the Transferring Node's IP address (), and for each received packet determines if it belongs to the session the Transferring Node () requested to transfer to the Target Node (). If it does, the Session Agent () will transfer the packet to the Target Node () at the Target Node's IP address (). If it does not, the Session Agent () will transfer the packet to the Transferring Node () at its temporary IP address (). In each SID mobility network, the session with respect to the Correspondent Node continues without interruption throughout the transfer, thereby providing a seamless transfer of the session from a first device to a second device.

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Schaumburg, IL, United States of America

Jeffrey T Eschbach