Abstract: A system for connecting low-cost, simple peripherals to an ATM network is disclosed. A plurality of such devices is connected to a standard ATM switch in a ring configuration. A polling station, located remotely in the ATM network, periodically generates a token cell which is delivered to the switch and, thereafter, is transmitted onto the ring configuration. The devices transmit cells in response to the token cells by transmitting cells behind the token cell as they forward it around the ring. The resultant cell chain is received at the ATM switch, where the cells are then sent onto the ATM network using virtual circuits.

Abstract: A method of predicting at least one future value of a time series of data using a neural network comprising the steps of:(I) inputting a plurality of values of the time series into the neural network;(ii) inputting information about a time into the neural network; and(iii) obtaining outputs from the neural network said outputs comprising predicted future value(s) of the time series.

Abstract: A network node comprises a cross-connect switch and a single signal quality monitor connected to one of the output ports of the cross-connect switch. The switch is controlled by a processor to establish connections. The processor is responsive to a request message from another network node for causing the switch to establish a connection between one of the input ports of the switch specified by the request message and the signal quality monitor and returns a reply message indicating a quality level of a signal appearing at the input port. A switched telecommunications network, such as Internet, may be used for transmission of the request and reply messages. Alternatively, the request and reply messages may be multiplexed with traffic signals.

Abstract: A method for allocating a geographical identifier is executed in a network for supporting a plurality of movable hosts being moved among a plurality of sub networks as keeping communications therebetween. When movable hosts 100, 101 moves to a sub network 110, an agent 120 of the sub network 110 allocates the same geographical identifier depending on the sub network 110 to the movable hosts 100 and 101 and stores logical identifiers and link layer addresses of the movable hosts 100 and 101. The packets destined for the movable hosts 100 and 101 are sent to the agent 120. The agent gets to know the link layer address corresponding to the logical identifier of a destination movable host described in a network layer header of the received packet from the registration table, generates the link layer header of the destination movable host, and add the link layer header to the received packet before transferring the received packet.

Abstract: In order to transfer data via a switched network that provides a wide range of network services, the users must establish a circuit or network connection and establish a data link connection. The circuit or network connection provides the physical connection between the users and data link connection provides the protocols and procedures for the transfer of data. Because the network provides a wide range of services, the users, typically by prior agreement, designate a common data link protocol to facilitate the transfer of data. A data link connection will not be established if the users are not using the same data link protocol. A method and apparatus are disclosed which permit a local system to detect the data link protocol used by a remote system. The invention provides a method for detecting the data link protocol used by the remote system when the remote system initiates the data link setup and a method for detecting the data link protocol when the local system initiates the data link setup.

Abstract: An exchange apparatus for exchanging packets based on a predetermined exchange system, including a plurality of input ports into which the packets are input, an input port identifier adding circuit for adding to a header region of each of the packets an input port identifier indicating the input port from which the packet was input, an output port identifier adding circuit for routing each of the packets to an output port and adding an output port identifier indicating the routed output port to each of the packets based on address information included in the header region and the input port identifier, and a packet exchanging circuit for exchanging the packets and outputting the same from the routed output port based on the added output port identifier.

Abstract: The present invention relates to an Asynchronous Transfer Mode (ATM) network, and in particular to a system and a method for a number of ATM devices to share the facilities provided by a single ATM switch port. An ATM switch has a number of switch ports which may receive and transmit the data comprising information and a routing identifier. A number of ATM devices are connected in series to each other in a device chain, and at the ends to the chain to a first ATM port. The devices are adapted to distinguish between the information and the routing identifier and may receive and transmit information through the chain, with a first or head device receiving data from the ATM port and the last device transmitting data to the ATM port. A control computer is connected to a second ATM port and may be programmed with the identities of the ATM devices and communicate through the first switch port with a device in the device chain.

Abstract: A radio transceiver system uses a single variable local oscillator frequency source which is used in mixing both before and after a band-pass filter. This causes a reduction in band-pass filter bandwidths. In an all-band transceiver for PCS for example the effect of this reduced bandwidth requirement is to increase the spacing between the transmit bands and the receive bands and thereby enable a reduction in transmission noise interfering with the reception bands.

Abstract: A data communication device having multiple ports is provided with an auto-negotiation system for performing auto-negotiation with multiple link partners connected to the ports. The auto-negotiation system has a memory and an auto-negotiation unit including transmit, receive and arbitration state machines for performing transmit, receive and arbitration state diagrams compliant with the IEEE 802.3 Standard. The auto-negotiation unit operates in a time-division multiplexing mode using successive time slots for supporting auto-negotiation operations for different ports. The memory is used for storing state diagram variables for a port in a time interval between the time slots assigned to that port.

Abstract: A method for establishing when to propagate the output of a multiplexer using a timing analyzer. The method uses not only the enabling edges, but also the disabling edges, of control signals to the multiplexer.

Abstract: Several nodes are connected to a ring structure by means of communication lines in a network for packet-oriented data traffic. Each node is connected to lines of the ring structure. A buffer circuit is provided between the high speed interfaces for reading a routing information on the head of a data packet. The buffer circuits are structured in such a manner that the delay time in the transit traffic is smaller than, for example, 10 .mu.s. Several users are connected at the node. A wait line circuit is provided for each user. A controller ensures the processing of the data packets in the transit, insert and extract modes.

Abstract: The outside distribution plant of the invention consists of a remote terminal such as a digital loop carrier, broadband distribution element or the like that receives telecommunications signals from a switching system or other network element. The signals are delivered to a variety of different types of line cards where each of the different types of line cards provide a different type of telecommunications service as is known in the prior art. Connection lines emanating from the line cards are connected to the inputs of a remotely controlled crossbar array where the inputs of the array can be selectively connected to the outputs of the crossbar array. The outputs of the crossbar array are connected to distribution lines that terminate at one of a plurality of feeder distribution interfaces that connect to customer lines that terminate at customer premise equipment.

Abstract: Ground-based pseudolites support accurate determination of mobile receiver locations by broadcasting CDMA signals interleaved by a TDMA system. Pseudolites synchronize signal transmissions with an accurate timing reference, such as can be derived from GPS satellites. Adjacent pseudolites broadcast CDMA signals at different times, eliminating near-far signal interference between pseudolites. A mobile receiver, typically a cellular telephone, receives and enables determination of times of arrival (TOA) of the pseudolite signals. A location processor associated with the mobile receiver may access an internal database of pseudolite locations, or pseudolite location information may be encoded in pseudolite transmissions. The location processor uses pseudolite location information and TOA to determine mobile receiver location. The TDMA pseudolite-based system may augment the GPS to provide more accurate location information than is available from the GPS alone.

Abstract: An adaptive communication system utilizes opportunistic peak-mode transmissions to transmit data between originating and destination stations, via one or more intermediate stations. Each station monitors the activity of other stations in the network, storing connectivity information for use in subsequent transmissions. Each station also sends out probe signals from time to time, to establish which other stations are in range. Messages are then sent across the network from station to station, with confirmation data being transmitted back to the originating station, until the destination station is reached. Old messages, which would otherwise clog the network, are timed out and deleted. A communication network and transceiver apparatus for use in the network are also disclosed.

Abstract: A computer network includes frame- or packet-based subnetworks connected by switches, the switches being interconnected by high-capacity trunks using a connection-based data transfer protocol similar to Asynchronous Transfer Mode (ATM). Some of the trunks include a Permanent Virtual Path (PVP) trunk crossing an ATM core network, the PVP trunk including one or more bidirectional PVPs. A multipoint-to-point (MPT) protocol is used among the switches to transfer packets as groups of cells directly from "leaf", or source, switches to "root", or destination, switches without requiring significant routing-related processing during cell transmission.

Abstract: In a packet data transmission and reception system a media access control (MAC) message is broadcast by a base station to a plurality of mobile stations. The MAC message contains packet data transmission scheduling information which allows the base station to preemptively control mobile station access to traffic channels in order to maximize the efficiency of packet data transmissions and allow scheduling consideration including priority access, quality of service and maximum bytes per transfer. The MAC message consists of a control frame structure which comprises scheduling parameters including MAC IDs fields, activity fields, and a field representing the number of free traffic channels in a cell. These parameters enable multiple mobile stations to share, in a time multiplexed fashion, traffic channels for packet data transmission on CDMA based mobile communication systems.

Abstract: In a packet data transmission and reception system a media access control (MAC) message is broadcast by a base station to a plurality of mobile stations. The MAC message contains packet data transmission scheduling information which allows the base station to preemptively control mobile station access to traffic channels in order to maximize the efficiency of packet data transmissions and allow scheduling consideration including priority access, quality of service and maximum bytes per transfer. The MAC message consists of a control frame structure which comprises scheduling parameters including MAC IDs fields, activity fields, and a field representing the number of free traffic channels in a cell. These parameters enable multiple mobile stations to share, in a time multiplexed fashion, traffic channels for packet data transmission on CDMA based mobile communication systems.

Abstract: Methods and apparatus for ATM segmentation and reassembly (SAR) which provide efficient transfer of ATM cell data between an ATM network and a set top box or other processing system. Reassembly operations are performed using a receive ring which stores an array of pointers. Each of the pointers specifies the address of a cell buffer suitable for storing a received ATM cell. Received ATM cells are first filtered to determine if the cells should be accepted. When a given cell is accepted, a pointer retrieved from the receive ring is used to determine the address of a cell buffer in which that cell will be stored. Host CPU software directing the operation of the SAR device periodically services the receive ring to prevent overflow. The host CPU software services the receive ring by sequentially stepping through the ring entries and linking the pointer for each stored cell into a chain of pointers maintained for the VCI on which that stored cell was received.

Abstract: A base station for a mobile communication system which has switching centers and base stations connected by telecommunication links, each base station transmitting radio signals divided into a plurality of time-slots in a frame structure, a controller unit for controlling the base station; a transmitter for generating a transmission signal, the transmitter being connected to the switch to supply the transmission signal to the antenna via the switch; a counter for counting the length of time-slots in a frame structure synchronized by a frame alignment signal, a programmable memory in which one or more delay values are each stored as a counter value, a selecting unit for selecting a delay value desired by the user, and a power level memory responsive to the counter and storing power level memory momentary power values corresponding to the parts of the time-slots in the frame structure, as well as information on whether the switch supplying the transmission signal of the transmitter to the antenna is switched of

Abstract: A communication system permitting temporary connections for specific, predictable data transfer performance is presented. The communication system includes a requesting computer system, a responding computer system, and communication paths for establishing connections between the requesting computer system and the responding computer system. The requesting computer system can establish a temporary initial control connection with the responding computer system through a first communication path. A temporary negotiating connection is established with the responding computer system. Data transfer characteristics are negotiated with the responding computer using the temporary negotiating connection. A temporary data connection is established through a set including at least one communication path based on the negotiated data transfer characteristics, the set not including the first communication path.