Abstract: A method is disclosed for controlling the transmitting power of a base station in a CDMA mobile communication system. The total transmitting power Ptotal of communication channels is calculated and compared with the maximum total transmitting power Pmax. A transmitting power reduction rate Dt−1 stored at the time of the previous control process is used when calculating maximum total transmitting power Pmax. The proportion of insufficiency of transmitting power is calculated as power reduction rate Dt based on the results of comparison, and this reduction rate Dt is used to reduce the transmitting power of each communication channel.
Abstract: In a method for admitting new connections based on measured quantities in a wireless communications network having a base station and remote hosts, the base station measures and computes performance metrics to determine whether admission of the new connection could cause a failure to meet the Quality of Service (QoS) promised to already admitted connections. Only if the QoS can be maintained is the new connection is admitted. In one embodiment, the base station may optionally disconnect one or more already admitted lower priority connections if doing so will allow a higher priority new connection to be admitted without loss of QoS to the remaining already admitted connections. In one embodiment, each connection request specifies the average bit rate required and a traffic burstiness factor, the base station measures the number of bytes sent by each connection for a certain period of time and a burstiness factor for the traffic in either direction.
Abstract: A telecommunications switching node that includes at least one resource interface card which serves as an interface for connection to external call processing resources. The interface card communicates with the line cards in the switching node directly over the system buses, i.e. without passing through the CPU\matrix card and it uses two line card ports to connect to all external resources. The resource interface card also communicates with line cards that are connected to the system buses in other switching nodes in an expanded switching network. Its resources are thus available to ports in the other nodes when those nodes have available ports that are not occupied with other tasks. For communications with the latter ports, the resource interface card transmits information through the CPU/matrix cards on its switching node and on the nodes where the communicating ports reside.
Abstract: An ATM system including a switch unit having a plurality of input/output ports and a plurality of interface units connected to the respective input/output ports of the switch unit, each of the interface units mutually generating an internal communication cell with information necessary for rate control of an ATM traffic added thereto, inserting the cell into a free band of a user traffic and sending the same to all the interface units through the switch unit to interchange rate control information between the respective interface units, thereby conducting rate control of an ATM traffic by which equal throughputs can be obtained among connections.
Abstract: A switch system (20) switches at least sixty-four asynchronous transfer mode (ATM) input data streams (22) into at least sixty-four ATM output data streams (24). The switch system (20) includes a backplane assembly (38) having integral data transmission lines, integral clock transmission lines, and discrete slots (36). A single stage space switch circuit card (26), a clock circuit card (28), and input circuit cards (30) are connected to separate slots (36) in the backplane assembly (38). The integral data transmission lines are coupled between the input circuit cards (30) and the switch circuit card (26) and the integral clock transmission lines are coupled between the clock circuit card (28) and the input circuit cards (30). Data path lengths for the integral data transmission lines differ in the backplane assembly (38), and clock path lengths for the clock transmission lines differ in the backplane assembly.
May 20, 1998
Date of Patent:
October 9, 2001
Daniel Richard Tayloe, Peter Joseph Armbruster, Kajana Aswath Rao
Abstract: A transmission, without modification of the transmission frequency, switches over the radiation characteristic for the radio signals corresponding to the time protocol of the message transmission, and the chronologically successive radio signals of a traffic relation are decorrelated to one another. In this way, the signal extinguishing that arises in a receiver due to multipath propagation can be reduced. The transmission apparatus is in particular constructed as a base station in GSM mobile radiotelephone networks.
Abstract: A processing apparatus for measuring accumulated values of performance monitoring (PM) parameters concerning a reception signal received by a transmission device, which is capable of detecting upper layer failures in a more accurate, hardware-based way, without increasing the workload imposed on the system's firmware. PM parameters represent the statistics of events that meet prescribed criteria for defects and anomalies in the reception signal. The processing apparatus has a plurality of failure detection units to detect different kinds of failures in the reception signal and produce failure detection signals corresponding thereto. Those failure detection units include a first failure detection unit that detects a first kind of failure and a second failure detection unit that detects a second kind of failure. On the basis of the failure detection signals, a PM controller detects at least one kind of PM parameter, and a counter unit accumulates the detected PM parameter.
Abstract: Upgrading of a subscriber connection to another requires an upgrading work done by an electrician. According to the invention, the type of connection is upgraded by remote control. A switch matrix bus including several parallel lines (1-8) is placed in the access node. Connected fixedly in advance to the bus are interface units of an ADSL connection and, when desired, of an ISDN connection, however, in such a way that only one interface is connected actively to one bus line at a time. A controlled switch element (SE1, SE2) connects a line coming from a test relay (R3) located between the end of the subscriber line (e.g. SL3) and its interface to the switch matrix bus instead of the test bus. With a remote control signal supplied through network management a choice is made of which test relay connects the connected subscriber line to the controlled switch element.
June 17, 1998
Date of Patent:
July 10, 2001
Nokia Telecommunications Oy
Hamish Kellock, Arne Nylund, Timo Norri
Abstract: Disclosed is a method of switching between redundant routes of a communication system in which terminal stations are connected by an uplink transmission line and a downlink transmission line that are devoid of redundancy. The method includes adopting working/protection redundancy for first and second apparatuses constituting each terminal station, detecting line failure, which has occurred on the side of the first terminal station, by the second terminal station, multiplexing additional data, which includes a line failure alarm, onto main signal sent from the second terminal station to the first terminal station (or inserting the line failure alarm in the form of overhead bytes), and causing the first terminal station to perform line switching upon detecting the alarm included in the additional data or overhead bytes.
Abstract: The present invention is embodied in a method an apparatus for reducing the number of leased E1 lines needed to backhaul communication traffic in a satellite communication situation. The present invention receives and decompressed a satellite signal. A copy of the compressed signal is then encoded into the least significant bits (LSBs) of the decompressed signal. The decompressed signal having the embedded information may be routed to an international PSTN network over leased communications lines. However, the compressed information is extracted from the decompressed signal and sent across the E1 lines, thereby conserving communication bandwidth and reducing the number of leased lines required. After passing through the E1 lines the information is decompressed and connected to the international PSTN network. Alternatively, the decompressed signal having the embedded information may be distributed to local PSTN networks, which interpret decompressed signals.
May 11, 1998
Date of Patent:
May 1, 2001
Hughes Electronics Corporation
Channasandra S. Ravishankar, Mohammad Soleimani
Abstract: A method and apparatus for detecting the link status of a network device in a computer system. An automatic link status detection mechanism allows a system to operate intelligently in a normal operation mode if the link status is on, or a suspend mode if the link state is down. The mechanism includes an auto link poll controller and a polling cycle generator for generating a sequence of polling cycles to query the link status of the network device. A media independent interface management frame having a preamble field is generated in a polling cycle. Because of the improved preamble field, it is to assure that an exact polling cycle is complete when a polling cycle is issued to the physical layer of the network device.
Abstract: A circuit arrangement for sensing errors in bit patterns for recording and plotting the occurrence in time, precisely to a bit, of transmission errors in a binary test signal. A pulse-generating device (5), which is fed a bit error signal sequence (BFS) generates a pulse (IS) in response to every signal change. A counting device (11), increments a counter as a function of a supplied bit timing (BT) and resets it to count value 1 when the pulse (IS) from the pulse-generating device (5) is applied. A buffer device (13) linked to the outputs of the counting device stores the counter contents of the counting device (11) in response to the application of a pulse (IS). An evaluation device (17,19,23) is fed, stores and displays the buffered counter contents.