Abstract: A new access channel protocol for use in cellular systems such as CDMA whereby the data transfer efficiency of an access message is increased by removing the requirement that a preamble frame and a message capsule frame have equal times of duration. With such removal, the BTS must inform listening MSs as to the time duration of the frames in each of the preamble and the message portions of the access channel time slot in addition to previously supplied information as to the number of frames in each portion. When unequal frame duration times are allowed, each portion of the access channel may be more nearly optimized to the actual time required to perform the functions of synchronization and message detection.

Abstract: A multicast address method for facilitating communication between nodes in “all IP” architectures that support CDMA soft handoff via IP multicasting wherein a multicast DHCP server allocates IP multicast addresses to mobile terminals from administratively scoped IP multicast addresses. IP multicast addresses are allocated to mobile terminals by offering, assigning, and distributing IP multicast addresses to the mobile terminals in response to IP multicast address requests from the mobile terminals to the multicast DHCP servers, which use unique mobile terminal identifiers to correlate mobile terminals with their prior and current IP multicast addresses. A multicast agent generates unicast IP address tables that map each of the unicast IP addresses, and edge routers use the unicast IP address tables to replace unicast IP addresses with their corresponding IP multicast address.

Abstract: A method and apparatus for improving the data transfer rate of packet-switched networks that employ retransmission timers is disclosed. Upon receipt by a sender of an acknowledgment message indicating that the intended recipient received a data packet, a retransmission timer is initialized with a value that compensates for the time lag between the transmission of a data packet by the sender and the receipt of an acknowledgment message. A communication network includes data transfer terminals that, upon receipt by a sender of an acknowledgment message indicating that the intended recipient received a data packet, initialize a retransmission timer with a value that compensates for the time lag between the transmission of a data packet by the sender and the receipt of an acknowledgment message.

Abstract: Controlling transmission energy in a variable rate communication system that gates out portions of a frame in a predetermined and predicable fashion. In particular, the present invention describes a method and apparatus which identifies closed loop power control commands that have been generated erroneously based on portions of a frame that have been gated. The identified power control commands are ignored. In an alternative embodiment, if identification of the erroneous power control commands occurs after response measures have been taken, the transmitting station responds by setting the transmission energy back to the state it would have been in had the erroneous power control commands been identified prior to the response.

Abstract: For any telephone service subscriber, local services could be offered based on either the packet switched next generation network (NGN) or the PSTN network. The network can be configured such that for each particular phone line, the line's services are based either on a PSTN's class 5 switch or on a NGN's service manager (SM). The local service provider, through software reconfiguration could quickly and efficiently move service subscribers' phone lines from class 5 switch based local services to SM based services, and vice-versa. If a call origination is attempted from a phone connected to an access gateway, the SM will instruct the network to handle the call differently depending on whether the services should be offered based on the class 5 switch or the SM. If the services ought to be offered through the class 5 switch, then the SM will establish a virtual local loop connection between the phone and the class 5 switch.

Abstract: An alarm suppressing method for an optical transmission apparatus includes the steps of checking whether a detected alarm is a root alarm, suppressing a first propagation alarm generated by the root alarm when the detected alarm is a root alarm, determining the types of network elements, suppressing a second propagation alarm generated by the root alarm in accordance with the determined types of the network elements, and suppressing a third propagation alarm generated in accordance with the second propagation alarm. The method further includes the steps of recognizing the direction of a detected propagation alarm, retrieving an element next to the recognized direction, checking the kind of the generated propagation alarm, and suppressing a corresponding propagation alarm when a data base includes a root alarm by retrieving from the data base the information relevant to the root alarm in accordance with the kinds of the checked alarms.

Abstract: A method of triggering reroutes in an ATM network based on a call optimization value being reduced beyond a predefined threshold. The method utilizes a signaling element in the SETUP message called a PNNI optimization reservation signaling element that includes an optimization type, value and percentage. A switch accumulates the optimization value and passes this value to the next node along the path. In addition, the hardware in the node is configured to measure and monitor the optimization value. The optimization value is monitored for changes that exceed the predefined optimization percentage. When this is detected, the software calculates a reroute. If the new route is better than the current route and is within the optimization percentage constraints, a reroute is performed using the newly calculated route. The reroute procedure provided by the ATM Forum can be used to implement the reroute.

Abstract: A new scheduling discipline is disclosed for the forward link of a wireless network such as a CDMA network. The new discipline, which we denominate Modified LWDF (M-LWDF), resembles the known LWDF discipline in that only one queue is served at a time, and the queue to be served is that having the largest weighted delay.

Abstract: A digital wireless telephone downloads software related to digital telephone services using a client browser. The digital telephone initiates a data call to an interworking unit via a digital wireless telephone network, using a prescribed wireless data protocol such as IS-95A. The interworking unit recovers the payload of the wireless data packets to establish a two-way data link with the digital telephone. The interworking unit sends data messages to a destination server across a second two-way data link in a packet switched network to establish a two way session between the digital telephone and the destination server. The user of the digital telephone can thus communicate with the server via a two-way application-layer session using hypertext-based messaging.

Abstract: Improved methods for providing a voice communications path over the internet. According to a first embodiment, a first PBX coupled to a first internet gateway device determines whether or not a second PBX has access to a second internet gateway device and, if so, the second PBX sends the IP (internet protocol) address of the second internet gateway device to the first PBX, and the first PBX sends the IP address of the first internet gateway device to the second PBX, over the PSTN (public switched telephone network) and/or over a network signalling channel. The first and second internet gateway devices then set up a voice communications path over the internet between the first and second PBXes.

Abstract: Information on forward power is indicated in the erasure indicator bit of reverse traffic channel frame. A control station searches for the erasure indicator bit of reverse traffic channel frame transmitted from the a mobile, to judge if forward power control is required. The power is controlled according to a transmission rate previously stored when it is judged that the forward power control is required. The control station searches for the erasure indicator bit of reverse traffic channel frame again after the power control and varies the transmission rate according to the information on forward power, carrying out optimum forward power control.

Abstract: A wireless high speed data communication system having a host radio station connected to a source of data. The host radio station transmits data to a radio repeater that is within a line of sight. The communication system may include numerous repeaters each of which is configured to communicate with each other within a line of sight. The repeaters are also configured to communicate with users by a direct electrical connection and a line of sight wireless connection. The users may also be electrically connected to a local area network for further distribution of the data.

Abstract: A mobile radio communication system for communicating between a base station and a mobile station by means of frames, each frame including a header and data. The mobile station includes a transmission number provider which provides a first transmission number to a first frame to be transmitted to the base station, and a transmission number extractor which extracts the first transmission number indicated in a header pattern of a second frame transmitted by the base station. The base station includes a reception number detector which detects the first transmission number included in the first frame transmitted by the mobile station, and a header provider which provides a header pattern corresponding to the first transmission number of the second frame. The mobile station retransmits the first frame when the mobile station does not receive the first transmission number indicated in the header pattern of the second frame.

Abstract: A switch to switch protocol for network load balancing which permits parallel redundant paths in a network to be utilized while reducing broadcast or problems inherent in prior switch configuration protocols. In particular, the present invention includes in the protocol a hello packet protocol which serves to exchange load balancing information among switches within a common load balance domain. Further, the hello packet protocol of the present invention enables detection and correction of improperly configured loops outside a load balance domain.

Abstract: To provide an OADM (Optical Add-Drop Multiplexer) convenient or organizing an NB-WDM optical communication system, wherein the number and the wavelengths of the optical signals to be dropped and added can be controlled optionally and optical intensity of each wavelength component can be leveled automatically at an appropriate level, the OADM comprises: an optical demultiplexer (2) for demultiplexing WDM optical signals into optical signals to be outputted to optical paths, respectively; an output-signal leveling unit (8) for automatically controlling optical intensity of optical signals inputted through the optical paths, respectively; optical switches (3-1 to 3-n) inserted in the optical paths, respectively, each of the optical switches dropping a first optical signal inputted from the optical demultiplexer (2) and connecting a second optical signal to the output-signal leveling unit (8) when driven in an add/drop mode, and passing the first optical signal to the output-signal leveling unit when driven in a

Abstract: There is disclosed an echo cancelling apparatus in a digital mobile communication system and method thereof, which is incorporated in a single chip together with a speech coder, and can improve convergence rate by using an excited signal as an input to n adaptive filter and also obtain a stabilized convergence characteristic while using a NLMS algorithm. The echo canceller according to the present invention uses the excited signal obtained at the speech coder as an input signal to an adaptive filter thereby to lower the Eigenvalues distribution rate of the speech signal, thus providing an improved performance compared to the conventional echo canceller.

Abstract: A customer interface device for coupling a customer site to a VDSL-based video, voice and data distribution network includes a signal splitter for separating incoming narrowband and broadband from a single twisted-pair copper wire, a narrowband port for connection to existing telephone wiring at the customer site, and a broadband port for connection to a customer set-top box via a CAT 5 wire. The interface device further includes a high pass filter connected between the splitter and the narrowband port, and a low pass filter connected between the splitter and the broadband port. The filters improve broadband signal quality while preventing feedback of EMI noise from the existing building wiring to the network.

Abstract: When service is allocated to a server of the other network on the basis of load information, a packet from a client is transferred as a transfer packet to the other wide area load distribution apparatus. The other wide area load distribution apparatus fetches the client packet from the transfer packet and converts its destination from a transferor address Lx to a server address S and its sender from a client address C to a self address Ly for sending to a server. Upon a reception of a response server packet from the server, the destination is converted from the self address Ly to the client address C and the sender is converted from the server address S to the transferor address Lx for the relay to the client.

Abstract: A scheduling apparatus, that can be used within a supertrunking capable Internet Protocol (IP) Forwarding (IPF) node, allows for efficient scheduling of packets for servicing after the packets are sorted into their proper order. The scheduling apparatus has a point and serve mechanism, a round-robin mechanism, and a starvation mechanism, and is to be used in situations where an IPF node is sorting and outputting multiple numbers of data streams. The point and serve mechanism directs two supertrunk pointers to the front packets of the particular data streams that the incoming packet segments correspond. The round-robin mechanism rotates a round-robin pointer between the front packets corresponding to all the different data streams. The starvation mechanism flags a data stream as starving if no packets have been scheduled after a predetermined number of times in which the round-robin pointer has been directed at the particular stream.

Abstract: A local area network of devices connected to a Communication Switching Module (CSM) carry both delay-sensitive information and non-delay sensitive user data in master Ethernet packets transmitted over the LAN at a constant rate. Signaling and control information from the devices initialize a permanent virtual connection (PVC) between devices and the CSM. The signaling and control information is contained in standard Ethernet packets which are encapsulated along with non-delay sensitive data in the master Ethernet packets and performs various control functions for the LAN devices and the CSM.