Abstract: Network resources for a call between a calling party and a called party are allocated. The network resources for the call are reserved based on a reservation request. The network resources are reserved before any one network resource from the reserved network resources is committed. The reserved network resources for the call are committed when a called party indicates acceptance for the call.

Abstract: A method for performing communications over a network comprises receiving a user record for a first user, receiving a query from a second user with regard to the first user, and sending, to the second user, as a response to the query, a call-handling profile.

Abstract: Network resources for a call between a calling party and a called party are allocated. The network resources for the call are reserved based on a reservation request. The network resources are reserved before any one network resource from the reserved network resources is committed. The reserved network resources for the call are committed when a called party indicates acceptance for the call.

Abstract: An apparatus and a method providing fair bandwidth sharing by adjusting video image quality in a data packet network comprises a network load detection means for detecting a network load and a video encoding control circuit. The network load has an uncongested state, a loaded state, and a congested state. The video encoding control circuit adjusts a video quality to a target video quality, by increasing the video quality when the network load is in the uncongested state and decreasing the video quality when the network load is in the congested state. The video quality is determined as a peak mean squared error between an uncompressed image and a corresponding decoded image. The network load is detected by using a forward explicit congestion notification bit.

Abstract: Signaling messages are exchanged for a call between a calling party to a called party. A setup message for the call is exchanged through at least one gate controller. Network resources are reserved for the call based on the exchanged setup messages. An end-to-end message for the call is exchanged without the end-to-end message being routed through the at least one gate controller.

Abstract: A method and system provide for adaptive coding for transporting of compressed video data. The method and system include techniques for predicting the rate which an encoder needs to be able to supply video to a network. The method and system also include the network receiving the demand rate and calculating an allocation rate which is ultimately fed back to the video source setting an explicit rate for the transporting of compressed video. Furthermore, it includes the adaptation of the encoding rate at the video source in accordance with the explicit rate allocated by the network in response to the demand.

Abstract: A virtual circuit rerouting method and apparatus provide for rerouting virtual circuits in an ATM-based network having mobile devices. Included are protocols for ensuring hand-off of the mobile device from a first basestation to a second basestation, identification of a rebuild switch and connection of the mobile device to the rebuild switch prior to data being transferred from the mobile device to the network. The rerouting method minimizes loss of data by ensuring that the mobile device is incapable of transferring data to the network before the virtual circuit rerouting procedure is completed. The method includes an aggregate registration request, or 3-phase handshake, and a "Connect Confirm" command. The virtual circuit rerouting protocols are further adapted to operate on most common virtual circuit rerouting strategies, including rebuild, partial rebuild and extension with loop removal.

Abstract: An apparatus and method providing fair bandwidth sharing by adjusting video image quality in a data packet network includes a network load detector for detecting a network load and a video encoding circuit. The network load has an uncongested state, a loaded state and a congested state. The video encoding circuit adjusts a video quality to a target video quality, by increasing the video quality when the network load is in the uncongested state and decreasing the video quality when the network load is in the congested state. The video quality is determined as a peak mean squared error between an uncompressed image and a corresponding decoded image. The network load is detected by using a forward explicit congestion notification bit.

Abstract: A method is provided for allocating the bandwidth of a shared resource. The resource takes into account not only the explicit rates allocated to sources by upstream bottlenecks but also takes into account the original relative demands of the sources either in terms of the actual demand placed into the networks by the respective sources or in terms of some other parameter indicative of the demands of the source, such as a minimum rate necessary to provide useful service for the source.

Abstract: An adaptive channel allocation system is provided which monitors the actual channel bandwidth used by network sources. Sources which have placed demands for network bandwidth, but not used that bandwidth, have their channel resources down-allocated according to a smoothed exponential function. Sources which are idle are detected by means of an aging function.