Abstract: For repeaters in a radio-based communication system, there is a function for identification and initiation of the respective repeater concerned. The said function can be effected without the need for digital decoding in the respective repeater concerned.

Abstract: In an ATM network a flexible AAL1 processor is connected to a similar AAL1 processor by a virtual circuit. This virtual circuit has n.times.64 kb/s capacity wherein each 64 kb/s channel or a P.times.64 kb/s subset of the capacity can be used for a separate call. The virtual circuit behaves similarly to trunk groups within present day digital networks and it is therefore termed a Virtual Trunk Group. Many Virtual Trunk Groups can be connected between the same two endpoints and contained within a virtual path thus forming a Virtual Route. The network is provided with a mechanism which allows the n.times.64 kb/s capacity to be changed by a managed process which ensures that established calls are not affected by the change of capacity. This change of capacity is performed in such a way that the clock systems of the two AAL1 processors are able to behave in the normal manner for synchronised or plesiochronous switching networks without incurring additional frame slips in the AAL1 data stream.

Abstract: A radio communications system (10) having a mobile station (30) and at least two base stations (13, 14). ATM radio channels (31, 32) are provided between the remote station and base stations. Each of the ATM channels supports communication though ATM cells over a common frequency band. At least one ATM node (21) is coupled to the base stations. A base station controller (11) is coupled to the ATM node. The base station controller has a combiner (303) for combining cell streams received from the first and second base stations and an ATM signalling circuit (330) for sending ATM commands to the ATM node for dividing cell streams at the ATM node to the first and second base stations. The remote station (30) has a logic unit (520) for combining cell streams received from the first and second base stations during a handoff from the first base station to the second base station.

Abstract: A method for common transmission of digital source and control data between data sources and sinks being connected through data lines, includes transmitting the source and control data in a format specifying a clocked sequence of individual bit groups of equal length. In these bit groups, certain bit positions are each reserved for the source and control data and the bit positions reserved for the source data form a cohesive region within one bit group. The region of a bit group reserved for the source data is subdivided into a plurality of partial bit groups of equal length. The source data assigned to each partial bit group are allocated to a certain data source/data sink as a function of the control data.

Abstract: A reception method and a receiver in a cellular radio system, the receiver comprising means for measuring the power level of each received signal. To detect the received signal in an advantageous manner, the receiver of the invention comprises means for dividing the received signals into several groups having at least two signals each, and means for detecting the signals in each groups from the received transmission simultaneously.

Abstract: Method and system for implementing a protection switching protocol of a telecommunications network (14). The method and system employs a protection object (80) including a set of attributes (84) and a set of functions (86) in communication with the attributes (84). The attributes (84) may store switching state information of the telecommunications network (14). The functions (86) may include a set of service functions (88) and a set of private functions (90). The service functions (88) may accept switching state information of the telecommunications network (14), store that information to the attributes (84) and retrieved that information from the attributes (84). The private functions (90) may also retrieved switching state information from the attributes (84). The private functions (90) may be invoked by a service function (88) or by another private function (90).

Abstract: A wireless telecommunications system (1) includes a central terminal (10) for transmitting and receiving radio frequency signals to and from a subscriber terminal (20). A downlink communication path is established from a transmitter (200) of the central terminal (10) to a receiver (202) of the subscriber terminal (20). A downlink signal (212) is transmitted from the transmitter (200) to the receiver (202) during setup and operation of the wireless telecommunications system (1). The receiver (202) of the subscriber terminal (20) compares a code and phase of a master code sequence in the downlink signal (212) to a code and phase of a slave code sequence of the receiver (202). The receiver (202) adjusts the phase of the slave code sequence until a match is obtained with the master code sequence. Matching of the slave code sequence to the master code sequence facilitates establishment of the downlink communication path.

Abstract: A communications apparatus for coupling a transmitter and receiver for duplex transmission is disclosed. The apparatus comprises a transmitter with a transmit power amplifier, a receiver with a receive filter, and a circulator with a plurality of ports, wherein the transmit power amplifier is connected to a first port of the circulator and the receiver filter is connected to a second port of the circulator. An antenna is demountably connected to a third port of the circulator. A switch alternately connects a load and the receiver to the second port of the circulator, wherein the receiver is connected to the second port of the circulator during reception of signals and the load is connected to the second port of the circulator during transmission so as to absorb power reflected by the antenna.

Abstract: A method and apparatus for conferencing two or mores calls in an expandable telecommunications system. The system may include a plurality of nodes connected by an inter-nodal network such that the nodes communicate with each other by exchanging variable-length packets of information. At least one node in the system contains digital signal processing circuitry capable of conferencing the voice information from three or more callers interfaced with the system. Packets containing voice information from each conference participant are preferably transmitted via the inter-nodal network to the node having the requisite digital signal processing circuitry. This node performs a conferencing function on that information, packets the resulting conferenced information and transmits those packets via the inter-nodal network to the nodes interfaced with the conference participants.

Abstract: A system and method for maintaining communication between a paging base station (transceiver) and a mobile paging unit when signal reception is below a level that would otherwise be unacceptable. The system changes from one data transmission rate to another depending upon the quality of the communication channel. In particular, the symbol rate of the transmissions remains the same, but the number of modulation states and bits per symbol is decreased or increased depending upon the bit error rate of the received signal. In some arrangements, the transceiver transmits at the highest bit rate for that particular system. If no response is received from the paging unit or the paging unit sends a response signal back to the transceiver indicating the signal sent is unacceptable, the transceiver retransmits at a lower bit rate. In other arrangements, the receiver determines the highest data rate within the group of data rates available and transmits a signal representative of that data rate to the base station.

Abstract: A transmitting device (15) for communication over a multiplicity of networks having a communication manager (22) and a mobility manager (20). The mobility manager (20) includes a database (40) having a net table (42) of potential networks and a filter (38). The filter (38) generates a prioritized list of qualifying networks over which a data object is to be transferred. Also described is a method for sifting through and filtering the net table (42) of potential networks and their characteristics. A prioritized list of qualifying networks is generated wherein each qualifying network has a priority. A transmission request is generated based on a combination of the data object and the prioritized list of qualifying networks and is transmitted over the selected qualifying network (26), (28), or (30) having a highest priority.

Abstract: A Physical Layer Device is disclosed having power savings features operable during auto-negotiation for multiple technologies. Excessive power consumption is alleviated by decreasing the power required by the receiver(s) during parallel detection. The Physical Layer Device includes at least one port, with each port including a parallel detection receiver for receiving data and messages from a connected device, the data and messages including autonegotiation fast link pulses indicating a technology capability of the connected device, a cycler for enabling the parallel detection receiver for a fraction of an autonegotiation period and a controller for controlling the cycler. The enabling of the receiver for each port, whether a multiple or single port device, is staggered to prevent more than one receiver from being enabled at one time.

Abstract: A method for transmitting digital data over data lines between subscribers forming data sources and data sinks and being disposed in a network having a ring structure and connecting a plurality of subscribers to one another with network segments each being formed between two adjacent subscribers, includes transmitting the data in the network in a format specifying a clocked sequence of individual bit groups of equal length, each including at least one partial bit group forming a data channel to be assigned temporarily to two subscribers in the network for a data transmission. A temporary allocation of the data channels for a data transmission between two subscribers takes place segmentally in the network, for optimal utilization of the data transmission capacity of the network only those network segments that are located between the applicable data source and the associated data sink are occupied for the particular data transmission.

Abstract: The present invention relates to a method of controlling a re-emission interval of an asynchronous transfer mode interval controller using a theoretical departure time. The present invention controls the generation of CDV in a controller of the current RDT similarly to the existing RDT method for controlling the intervals of ATM cells by processing the time which a cell is outputted from an interval controller as a theoretical departure time and registering by a little earlier time in CSQ compensating for the queuing delay of OQ, and solves the problem of the queuing delay accumulation in the existing RDT method.

Abstract: When signals are transmitted via an integrated services digital network (NET), the transmission capacity of the individual channels is predetermined. Two independent integrated services digital networks (NET) can be interconnected, for example via a radio link. However the radio link only has a limited number of channels available, and their transmission capacity is not predetermined. Before the signals of the first integrated services digital network (NET1) are converted into radio signals, the signals are routed to an apparatus (EIN) where they are compressed and divided. The apparatus (EIN) comprises a demultiplexer (DMUX) for demultiplexing the signals to the individual bearer and signalling channels, a switching unit (S) for separately routing signals to be compressed, e.g. voice signals, and signals not to be compressed, e.g.

Abstract: A method and an apparatus are provided for transmission of band limited QPSK data which is orthogonal direct-sequence spread using a BPSK sequence which preserves the band limiting even with subsequent amplification by non-linear amplifiers. This feature allows inexpensive implementation in mass produced, portable communications devices.

Abstract: A rate based flow and congestion control mechanism for packet communications whereby the acceleration and deceleration of the sending rate is moderated to be responsive to the traffic encountered. The method of the present invention also reduces oscillation in the transmission rate by being responsive to the characteristics of the network traffic and allowing burst intervals to be borrowed on a periodic basis.

Abstract: An arrangement for determining transmission delay in a subscriber network which has a plurality of subscriber sets, a plurality of subscriber terminals (to one subscriber terminals to one subscriber terminal being connected at least one subscriber set by a transmission connection implemented in an electrical form), and a central unit, which is common to the several subscriber terminals and connects the subscriber sets to a public switched telephone network. In the subscriber network, time-division data transmission between the several subscriber terminals and the central unit occurs along a common transmission path. A value representing the transmission delay between the central unit and an individual subscriber terminal is determined, whereby a transmission of a subscriber terminal towards the central unit is synchronized in he subscriber terminal with the frame structure of a signal to be transmitted from the central unit towards the subscriber terminal.

Abstract: A satellite communications system employs CDMA multiple access technology. Polarizations are associated with each spreading code to enhance separation between simultaneous users in the absence of perfectly orthogonal spreading codes. A satellite transmitter CDMA encodes(210) and carrier modulates(220) a user or block of users, and then assigns a polarization to the user of block of users. A CDMA reference signal also receives a polarization. A ground receiver (30,40) receives the polarized CDMA signals as transmitted by the satellite. The ground receiver ascertains the polarization of the reference signal and then computes the polarization of the desired polarized CDMA signal. The use of the reference signal negates the effects of the faraday rotation caused by the satellite signal(10,20) passing through the ionosphere.

Abstract: A bursty traffic multiplexing arrangement (A) includes a multiplexing unit (MUX) to multiplex a plurality of bursty input flows (IF1, . . . , IFI, . . . , IFN) into an output flow (OF). Congestion due to insufficient throughput capacity of the multiplexing unit (MUX) is avoided by incorporating an input shaping device (ISDI) for each input (MII) of the multiplexing unit (MUX). Data elements constituting such an input flow (IFI) are stored in an input buffer (IBI) which forms part of the corresponding input shaping device (ISDI), and are applied to the multiplexing unit (MUX) at a rate (BI) which does not exceed a predetermined maximum input buffer reading rate (BIMAX) associated to this input buffer (IBI). Furthermore, via feedback input flow rate control information (IFRI), the input flow rates (A1, . . . , AI, . . . , AN) can be controlled to thereby avoid input buffer overload.