Abstract: A micro-mobility network routing system and method implementing a protocol that extends the macro mobility support of Mobile IP to support micro mobility is disclosed which permits a more efficient and easily implemented Internet routing protocol for network devices to be affected. The macro mobility feature herein refers to the notion in which the mobile node gains access to the Internet, while retaining the same IP address. This concept is used only once when the mobile node enters the coverage area of a foreign domain (eventually its home domain). The concept of micro mobility within this context eases routing packets to the mobile node while its moves within the foreign network. The present invention implements these new features via the use of message compositions and protocol extensions that extend the prior art Mobile IP protocols.

Abstract: Systems and methods are provided wherein call-blocking probability of a telecommunications system is calculated based on consideration of over flow paths and alternate routes. Once the routes and overflow pathways are identified, the total number of call attempts and calls failed, due to congestion, is determined from statistical route data. Dividing the number of failed calls due to congestion by the number of attempted calls results in the blocking proportion for each route that is used by the methods disclosed herein to calculate the probability of blocking for that route.

Abstract: A hard handoff method between asynchronous CDMA (code division multiple access) system and synchronous CDMA system is provided. A hard handoff method between asynchronous CDMA (code division multiple access) system and synchronous CDMA system in accordance with an embodiment of the present invention includes following steps. First step is to transmit asynchronous CDMA channels from synchronous CDMA base stations with a purpose of synchronizing handoff time at synchronous CDMA base station and code used at synchronous CDMA base station. The transmission is done by a mobile terminal that is in communication with an asynchronous CDMA base station. The transmission is a part of handoff process and the mobile terminal performs hard handoff to synchronous CDMA base station. Second step is to report measured result to the asynchronous CDMA base station on the basis of intensity of asynchronous CDMA pilot channel received from an adjacent synchronous CDMA base station. The reporting is done by the mobile terminal.

Abstract: The invention provides a method and system for adaptive point-to-point communication between a wireless communication system and a non-wireless backhaul communication system. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by base station controllers in multiple cells of the wireless communication system for intercommunication among those multiple cells. The IP layer and QoS (quality of service) parameters for communication between a selected base station controller and the non-wireless backhaul communication system collectively include a second set of parameters, which are adaptively modified by the selected base station controller for intercommunication between that selected base station controller and the non-wireless backhaul communication system.

Abstract: A method for facilitating inverse multiplexing over asynchronous transfer mode is disclosed herein. The method includes receiving a stream of sequentially aligned ATM cells via an originating end point logical communication link. A sequence identifier is associated with each one of the ATM cells for creating sequence-identified ATM cells. The sequence-identified ATM cells are forwarded to a destination endpoint logical communication link in a distributed manner over a plurality of IM communication links. A first one of said IM communication links has disparate data transmission rates in at least one data transmission direction with respect to a second one of the IM communication links.

Abstract: In a data packet router, a method for redirecting packets destined for a port comprises steps of monitoring port status on a continuing or periodic basis, updating a port-status table, listing port status as active or failed and an alternative destination for each port, checking the table by circuitry along a packet route for a packet en route, and sending the received packet to the predestined port if the port is listed in the table as active, and sending the received packet to the alternative destination if the port is listed in the table as failed. The method can be implemented essentially anywhere along a routing path where circuitry may support a table look-up and re-tagging packets for alternative destinations. In one embodiment the automatic protection switching is performed in a fabric card, and in another on a line card.

Abstract: A mobile station is coupled to a first base station via a first wireless connection while in the zone of the first base station zone. Through the first base station and in conjunction with a PPP session manager, the PPP session manager establishes a first link of a PPP session to a remote server across a data network having mobile station handoff capability. When moving into the zone of a second base station and in conjunction with the PPP session manager, the PPP session manager creates a second link of the PPP session. The first and second links take different paths through the data network. The PPP session manager releases the first link while preserving the PPP session.

Abstract: A system for use in a bi-directional path switched ring network for detecting a failed optical path and establishing a protection path so as to allow signals from the failed optical path to be re-routed via the protection path is provided. According to one aspect of the system, upon detecting a failure relating to an optical path, the destination node generates a connection request message for transmission to the source node. The connection request message is passed to the source node via one or more intermediate nodes, if any. Each intermediate node examines the connection request message accordingly reserves the requisite wavelength from the protection capacity so as to allow signals from the failed optical path to be re-routed. Upon receiving the connection request message, the source node readies its switching equipment to re-route signals from the failed optical path and generates an acknowledgment message and propagates it back to the destination node via the intermediate nodes.

Abstract: Mechanisms, in a transmission channel shared by 802.11 systems and HIPERLAN/2 systems are provided to prevent 802.11 terminals from transmitting during time periods allocated to HIPERLAN, so that a single channel can be shared between the two standards. In a particular embodiment, a “super frame” format is used where HIPERLAN transmissions are offered the highest level of protection possible within 802.11, which is needed within the 802.11 Contention Free Period (CFP).

Abstract: A virtual wireless local area network system and method utilizing impulse radio wherein transmission rates (bit rates) can vary according to the impulse radio transmission quality (signal to noise ratio) and wherein the position of the user can be determined and said user can be directed to an area of greater transmission rates and wherein a plurality of impulse radio portals can be utilized and switched between to maintain high levels of transmission rates while a user is moving within a predetermined area.

Abstract: A mesh network for routing a plurality of data segments therethrough, each of the data segments containing address information. The network includes: a first, second, and third switch element each having a respective external input for routing data segments into the network and a respective external output for routing data segments out of the network; a bi-directional coupling between each of the switch elements; and a first controller for interrogating the address information of each of the data segments inbound into the first switch element. The exit pathway for any inbound data segment received by a switch element is selected according to the address information of that data segment, and if a contention exists for the exit pathway, further according to a priority designator of that data segment.

Abstract: A cellular messaging network includes a switching controller connected to the wireless telephone network. One or more base station micro/picocell retransmitters are coupled to the switching controller. The base station micro/picocell transmitter uses simplified control equipment having no digital traffic channel capability. Each base station micro/picocell retransmitter is able to discriminate between voice channel assignment signals and short messaging signals in the digital control channel, discard the voice channel assignment signals, and rebroadcast the short messaging signals in the digital control channel. One or more receivers are coupled to the base station micro/picocell retransmitters by way of an IS-136 protocol digital control channel. The base station micro/picocell retransmitter can be connected to the switching controller through a twisted-pair telephone line.

Abstract: A method and apparatus for interfacing a communications server for use with a circuit based telephony system with an Internet protocol telephony system are provided. The present invention enables service providers to service both tip-ring telephony type communications and Internet protocol telephony type communications using a single communications server. In addition, the present invention enables existing tip-ring telephony type communications servers to be modified to support Internet telephony communications.

Abstract: Method, system and computer products are provided for re-mapping and interleaving transport packets of multiple transport streams for processing by a single transport demultiplexor. The re-mapping and interleaving technique ensures unique identification of transport packets associated with multiple transport streams to be multiplexed onto a transport channel for demultiplexing by a single transport demultiplexor. At least one PID re-map table is employed having re-map values indexed by n possible PID values of transport packets associated with at one transport stream of the multiple transport streams. The n possible PID values is less than or equal to the number of PID values which can be handled by the single transport demultiplexor, and is less than all possible PID values of transport packets within the multiple transport streams.

Abstract: A method of transmitting digitally coded traffic information is described, in which a digitally coded traffic message including location information is transmitted is standard format, preferably according to the TMC method. When the location information in the traffic message requires change and/or completion, a header is provided in front of the traffic message, which indicates that additional information including changes or additions to the location information in the traffic message follows the traffic message. A receiver for reception and analysis of the digitally coded traffic information is also provided, which analyses the traffic information including the additional information to obtain the changed or completed location information.

Abstract: Arbitration for a switch fabric (e.g., an input-buffered switch fabric) is performed. The switch fabric has a set of ports. Each port from the set of ports is associated with its own set of links. The set of ports includes a first port and a second port. A link is selected from the set of links associated with the first port based on a weight value associated with each remaining link associated with a candidate packet and being from the set of links associated with the first port. A first penalty for a weight vector entity associated with the first port is determined by based on a weight value associated with each link from a first subset of links from the set of links for the first port. Each link from the first subset of links is not associated with a candidate packet.

Abstract: A multi-service platform system (100) includes a rear transition module (102) coupled to receive a DSX signal (105) and a payload node (104) coupled to the rear transition module via a backplane (110), where the payload node is coupled to process the DSX signal. A secondary payload node (114) is coupled to secondary rear transition module (112) via the backplane. A protection bus (150) couples the rear transition module to the secondary rear transition module outside the backplane, where failure of the payload node operates to shunt the DSX signal through the rear transition module to the secondary rear transition module. Failure of the payload node operates to switch processing of the DSX signal from the payload node to the secondary payload node, and the secondary rear transition module independently controls shunting of the DSX signal through the rear transition module to the secondary rear transition module.

Abstract: A system for allocating storage resources in a storage area network is described. A logical unit number (LUN) mapper receives at least one storage request parameter and maps the storage request parameters to at least one physical LUN. The LUN mapper includes at least one LUN map. The storage request parameters include a host id parameter, a target LUN parameter, and a target host bus adaptor (HBA) parameter. The LUN mapper uses the host id parameter to select the one of the LUN maps that corresponds to the host id parameter. The LUN mapper applies the target LUN parameter and the target HBA parameter to the selected LUN map to locate the physical LUN(s) stored in the selected LUN map. The LUN mapper issues the received read/write storage request to at least one storage device that houses the physical LUN(s). The one or more storage devices are located in the storage area network.

Abstract: Loopback interfaces are put into routers in a packet switched network. When an end to end Quality of Service (QoS) path is not performing adequately, the delay and jitter characteristics are measured for individual network subsystems. An audio signal is converted into a stream of audio packets and sent hop by hop to the different routers in the network having the loopback interface. QoS is determined by looping back the stream of audio packets from the different routers. If necessary, the network is reconfigured according to loopback delay in the individual network subsystems. Reconfiguration can comprise routing telephone calls through different paths in the network or adding additional equipment to increase capacity.

Abstract: To monitor the use of a chargeable dynamic signaling port of a trunk connecting two exchanges, in particular in connection with applications which communicate via exchanges and which are likely to require to use such ports, rights of use are assigned to each application enabling it either to have a port of this kind set up and then to use it, or only to use a port of this kind if it has already been set up.