Nortel Networks Corporation

Gregory Robert Utas

David P Ress

Xuewen Li

Denise J Ingram

Stephanie Ho

A method and an apparatus for interworking between internet protocol (IP) telephony protocols includes a call server. The call server includes a first protocol agent for communicating with a first protocol device according to a first protocol. A second protocol agent communicates with a second protocol device according to a second protocol. An interworking agent provides functions usable by the first and second protocol agents to communicate with each other according to a third protocol. The third protocol is a superset of functions provided by the first and second protocols.

Method and apparatus for interworking between internet protocol (IP) telephony protocols

A method for handling input/output messages for plural call processing applications which reside on a processor subsystem of a mobile switching center. An input/output message having a message transport address owned by one of the call processing applications is received at a memory subsystem thereof. The call processing application owning the received address is the application which will later handle the received message. The received address is transferred to an interrupt handler which also resides on the processor subsystem. There, a call to the call processing application which owns the address received for the incoming input/output message is issued. In response thereto, the call processing application wraps the received message with an object to be used by the received message when it is to be handled by the call processing application and stores the wrapped message at a selected location within the memory subsystem. The call processing application then schedules itself for execution.

Method and apparatus for handling I/O messages

A method for establishing a connection, either circuit-switched or packet-switched, between first and second mobile terminals of a telecommunications network and an associated switching node which includes a connection handler and a connection agent for each mobile terminal. To establish the connection, the connection handler determines if the connection agent for the first terminal is willing to transmit to the connection agent for the second terminal. If so, the first connection agent transmits a first endpoint address to the second connection agent. The connection handler determines if the second connection agent is willing to listen to the first connection agent and, if so, the first endpoint address is accepted by the second connection agent. A one-way connection between the first terminal and the second terminal in-which the first terminal can talk to the second terminal and the second terminal can listen to the first terminal is then established. The connection handler further determines if the second connection agent is willing to transmit to the first connection agent. If so, the second connection agent transmits a second endpoint address to the first connection agent. The connection handler determines if the first connection agent is willing to listen to the second connection agent and, if so, the first connection agent accepts the second endpoint address. A return connection between the first and second terminals in which the second terminal can talk to the first terminal and the first terminal can listen to the second terminal is then established.

Connection protocol for mobile terminals

A method for handling multiple call processing requests by a mobile switching center having call processing software which includes an application raising a series of events to be handled in sequence, at least one of which is implemented in a single use dynamic object. For each of the events implemented in a single use dynamic object, a quasi-singleton is created and cached in a data store for later use (and re-use) in handling the event. When a request is received, the call processing handles, in sequence, a series of events. If a first one of the series of events to be handled is implemented as a quasi-singleton, the quasi-singleton is marked in use. In the event that the quasi-singleton is unavailable, however, for example, if a prior event using the quasi-singleton traps or suspends, a new quasi-singleton is created for use in handling the event. After the event has been handled, the quasi-singleton is freed, thereby making it available for re-use by either a next event in the sequence of events, next execution of the application or a first execution of a next application.

Enhanced processing technique for object-oriented software

A method and system in a communications network for managing multipath calls by establishing virtual communications nodes for effectively handling the automatic routing of communications transactions initiated within the communications network. A communications transaction is initiated from an originating node to a desired terminating node. The communications transaction is then automatically routed from the originating node to an alternative terminating node, in response to a predetermined control parameter, by associating a first virtual communications node with a first terminal of the desired terminating node, and associating a second virtual communications node with a second terminal of the desired terminating node. Completion of the automatic routing of the communications transaction to the alternative terminating node is accomplished by terminating the communications transaction at the alternative terminating node by routing the communications transaction through the first virtual communications node and the second communications node such that a multipath call placed from the originating node to the alternative terminating node is represented as a group of series of connections rather than a direct connection between the originating node and the alternative terminating node.

Growing community of inventors

Irving, TX, United States of America

Gregory Robert Utas