Abstract: A method for optimizing power management in the transmittal of a variable rate data transfer between two wireless stations, such as a Base Station Transceiver and a Mobile Station. This is achieved by determining the initial power and the initial signal-to-noise values based on the reliability of the transmission, the desired data transfer rate, the power required to transmit a fixed rate message, and the frame error rates. By the use of this invention, the capacity of a desired system and/or quality of a service provided by a desired system may be enhanced.

Abstract: A wireless packet data communications system that includes a number of modem pool transceivers (MPTs), one or more modem pool controllers (MPCs), and one or more servers. Each MPT receives and processes data packets to generate a modulated signal (e.g., a CDMA spread spectrum signal) suitable for transmission over a terrestrial communications link. Each MPC provides call related processing for one or more MPTs. The servers couple to the MPTs and MPCs via an Internet Protocol (IP) back-bone and provide management of the communications system. The IP back-bone further interconnects the MPTs with one or more data networks and includes a number of routers that route data packets between the data networks and the MPTs. Each MPT can couple to two or more routers for redundancy. Each MPT is operated as an element in an IP network and is associated with an IP address that identifies the MPT.

Abstract: The present invention pertains to a frame matching method for digital systems. Excess bits are deleted from a frame of data in a single iteration through the data, thereby creating a reduced length frame, wherein the deleting step is performed such that the distance between any two consecutive deleted bits within any group within first subset of the frame is A bits, and the distance between any two consecutive deleted bits within any group within a second subset of the frame is B bits, where A is an integer greater than 0 and B is an integer greater than A, and where the first subset and the second subset together form a plurality of consecutive bits.

Abstract: A method and apparatus for positioning a mobile station in a Time-Division Multiple Access (TDMA) communication system are disclosed. The apparatus comprises a plurality of power detectors respectively located at predetermined positions and at least one controller coupled to the power detectors. The power detectors respectively measure a plurality of power values of the signal generated by the mobile station in a preset channel and a preset time slot, which are allocated to the handset by the TDMA communication system. The at least one controller is able to identify the handset according to the preset channel and the preset time slot and to determine the position of the handset according to at least one of the plurality of power values measured and the position of the corresponding detector.

Abstract: In one aspect, a method of using a general purpose computer 8 as an MPLS-enabled label switched router includes executing software on the general purpose computer 8 that allows it to communicate with other label switched routers using label distribution protocol. The general purpose computer 8 includes a central processor 10, a memory 12, network interface cards 30 and 32 and also typically includes local I/O such as a keyboard 22, a mouse 24 and a display device 20 for communicating with a local user.

Abstract: Methods, receivers and transmitters all adapted to assist in the performance of layer 2 frame delineation are provided which are applicable in the context of OFDM, and also applicable to any layer 1 design facilitating high data rate transmission. Advantageously, the invention allows the identification of where a layer 2 frame begins notwithstanding the fact that the previous layer 2 header, which would normally be used to identify the location of the next layer 2 frame, has been received in error. As a consequence, rather than discarding considerable quantities of data after an erroneous header, for example all data until a super-frame boundary, layer 2 frames can be correctly received staring with the next header received in a non-erroneous layer 1 frame.

Abstract: Methods and apparatus for sending a redirect packet to a host by a first router that supports a virtual router protocol are disclosed. Specifically, the redirect packet notifies the host that specific packets are to be redirected to a second router. First, the first router receives a packet from a host, where the packet includes a source address identifying the host and a destination address identifying a destination network. The first router ascertains the destination network of the packet from the destination address and obtains from a routing table an address of a next router that is coupled to the packet's destination network. The first router then determines whether to send a redirect packet to the host. In accordance with one embodiment, this is performed by determining whether the next router and the host identified by the source address of the packet are on the same network.

Abstract: A method is described that involves presenting packet header information from a packet and packet size information for the packet to a pipeline that comprises multiple stages. One of the stages identifies, with the packet header information, where input flow information for the packet is located. The input flow information is then fetched. The input flow information identifies where input capacity information for the packet is located and the input capacity information is then fetched. Another of the stages compares an input capacity for the packet with the packet's size and indicates whether the packet is conforming or non-conforming based upon the comparison. The input capacity is calculated from the input capacity information.

Abstract: A multiplex transmission system of tributary signals multiplexes a plurality of tributary signals after adding to them frame information common to all the tributary signals and identification codes different for the individual tributary signals. This makes it possible to solve a problem of a conventional multiplex system of tributary signals in that the transmission rate is limited because it multiplexes a plurality of tributary signals with adding an SOH (section overhead) to generate an STM-N frame to be transmitted and received, which requires a considerable time.

Abstract: Internet protocol (IP) performance monitoring method and apparatus generate a timing probe data to be sent over the network, the timing probe data packet containing at least a send time of day (STOD) stamp for a sender of the timing probe data packet. The timing probe data packet is sent over the network from the sender to a receiver. The timing probe data packet contents including at least the STOD stamp are analyzed as a performance measure of the network. After sending and before analyzing, data including at least a receive time of day (RTOD) stamp is written into the probe data packet at the receiver, and probe data packet is echoed by the receiver. In this way, the probe packet sender performs the analysis based upon the STOD stamp and the RTOD stamp.

Abstract: A method that involves recognizing an incoming FAX call at a destination edge node, the destination edge node supportive of at least two FAX transport manners. A first control packet is sent from the destination edge node to an originating edge node that effectively requests transmission of the FAX call according to one of the FAX transport manners. A second control packet is sent from the originating edge node to the destination edge node that effectively confirms or refuses to confirm transmission of the FAX call according to one of the FAX transport manners.

Abstract: To prevent degradation of transmission quality due to interference between scramble codes, under such a situation as soft hand over, when the number of mobile stations connected with a base station exceeds the number of the orthogonal codes. The base station decides the priority of the scramble code. The scramble code is allocated to the mobile station, in accordance with the priority. When a mobile station ends its call, or stops temporarily its call, its PN code is re-allocated to the mobile station with lowest priority code.

Abstract: If the strength of the signal transmitted from a remaining base station is larger than that from the active base station, the search control unit 103 shifts to the confirmation mode, where the remaining base station is designated as a confirmation target remaining base station. Then, if the strength of the signal transmitted from the confirmation target remaining base station is larger than that from the active base station, a counter is incremented. If the counter value becomes a predetermined value R, a hand-off is performed to the remaining base station. In case that the strength of the signal transmitted from the confirmation target remaining base station becomes not larger than that from the active base station, the confirmation mode is terminated at that point to return to the normal mode.

Abstract: An information relay device connected between a plurality of logical or physical networks for performing an operation for relay of information between the networks is provided with a transmit/receive processing unit for receiving a general purpose multicast message from one of the plurality of networks and transmitting a multicast message to at least one of the plurality of networks, and a protocol conversion processing unit for converting, in the case where the general purpose multicast message received by the transmit/receive processing unit is a multicast protocol message of a certain level layer, the multicast protocol message of the certain level layer into a multicast protocol message of another level layer.

Abstract: A model is given for performance evaluation of IP computer networks that are dominated by congestion-controlled traffic. The model includes heterogeneous TCP flows, UDP flows, short-lived TCP flows, and TCP flows in a differentiated services network. The performance of large-scale networks is estimated where flows may encounter multiple congested links.

Abstract: Disclosed is a method for assigning packet data to be transmitted to a radio packet data channel of a base station system in response to a packet traffic transmission request for a plurality of mobile stations in a mobile communication system. The method comprises collecting the packet traffic transmission requests of the radio packet data channel for the mobile stations; selecting at least one of the mobile stations from the collected packet traffic transmission requests; transmitting to the selected mobile station a channel assignment message including information about a data rate, data transmission durations of the radio packet data channel and start points of the data transmission durations for the selected mobile station; and transmitting the packet data to the selected mobile station at the start time of the data transmission durations at the data rate.

Abstract: A network device includes a first switch, a second switch, address resolution logic (ARL), and a CPU. The first and second switch having a groups of ports which are a subset of the plurality of ports and are numbered by a different numbering schemes. The CPU coupled to the first switch and the second switch and configured to control the first switch, the second switch, and the ARL. A first link port of the first group of ports is coupled to a second link port of the second group of ports. The ARL is configured to perform address resolution based on the first and second numbering schemes such that when the first network port a data packet received at the first network port destined for the second network port is directly routed from the first network port to the second network port.

Abstract: A selected user equipment transmits a signature in a selected one of the common packet channel's time slots. The base station, in response to receiving the transmitted signature, selects a currently unused code, if available, out of a plurality of code associated with the access opportunity defined by the selected signature and selected time slot. The base station transmits an acknowledgment signal comprising an identifier of the selected code. The selected user equipment receives the acknowledgment signal. The selected user equipment and the base station communicate using the selected code.

Abstract: A method and apparatus for a router to inform a Layer 2 switch by use of packets of a new router group port management protocol (RGMP) that the layer 2 switch is to forward multicast packets of a specified group to the router. First the router transmits a RGMP HELLO packet to the layer 2 switch to inform the switch that the router is a multicast router implementing the invention. Then, in the event that the router receives an IGMP packet from an end station requesting multicast packets of a particular group, in response the router sends an RGMP JOIN packet to the layer 2 switch. The RGMP JOIN packet requests that the layer 2 switch forward only multicast group packets, of the group whose group number is written into a field of the RGMP JOIN packet, to the router. Also, the router sends a prior art PIM JOIN packet to other multicast routers in order to be placed on the multicast distribution tree for that group.

Abstract: A user equipment transmits a signature in a selected one of a plurality of time slots of a common packet channel. The common packet channel is defined by a predetermined set of codes and has a plurality of access opportunities. Each access opportunity is defined by a time slot of the plurality of time slots and a signature. An identifier of a selected code of the predetermined set of codes is identified. The selected code is selected from a currently unused code, if available, based on a code association with the access opportunity defined by the selected signature and selected one time slot. The user equipment communicates using the one selected code.