Abstract: A method, performed by an access point of a cellular network, obtains time information by identifying a control channel cycle boundary; at a beginning of the control channel cycle boundary, sending a request to a time server; receiving a response from the time server, the request including a server time; and obtaining the timing information using the server time. Obtaining the timing information includes using the server time and a first reference time to obtain an integer and a fraction; using the fraction to obtain a time difference; and using the time difference to obtain the timing information.

Abstract: Disclosed is a method that includes determining an identifier of an access terminal authorized to use an access point, and transmitting a service redirection message including the identifier. The method also includes transmitting a parameter that instructs the access terminal to wake up during the particular time slot in the repeating interval.

Abstract: An access terminal determines whether a parameter encoded in a signal received from an embedded access point is identified by a list in a memory of the access terminal. Based on the determination, the access terminal initiates communication with a radio area network through the embedded access point.

Abstract: A device is for communication between a digital adapter linked to an exchange by means of a digital interface and an analog adapter linked to an exchange by means of an analog interface, said exchanges being linked by means of a telecommunications network. Digital information from the digital adapter is sent to the analog adapter, and vice versa, in digital form without emulating an analog signal.

Abstract: Data packets are received at a communications node. Each of the received data packets is associated with one of a set of different service classes. Packets corresponding to the received data packets are transmitted to recipients. The order in which the data packets are transmitted is controlled based on the transmission rate and the service class of the packets.

Abstract: A device causes at least one access terminal that is configured to transmit datal to a radio node in a sector of a radio access network to alter transmission. While transmission is altered, the device determines a power of a signal received at the radio node, and updates an average value of signal power using the power measured. A device receives, from one or more access terminals that are configured to receive data from a radio node in a sector of a radio access network, a requested rate at which information should be transmitted to each access terminal, receives from the access terminals information about quality of signals received from the radio node, and generates an event if the requested rate and the information about quality of signals fail to satisfy a condition. An access terminal, located in the vicinity of a first radio node configured to transmit data in a sector of a radio access network, measures signal power of pilot signals received by the access terminal.

Abstract: A system and method for fast and reliable failure notification and accelerated switchover for path protection in a communications network having several overlapping areas of nodes interconnected by communications links is described. Upon a failure event involving one of the communications links, a failure message is broadcast identifying the failed link, the broadcast being confined within the areas which include the failed link. A reliable transmission protocol is provided wherein at one or more of the nodes, a LAPD protocol unnumbered information frame containing the failure message is sent to connected nodes. The failure message is resent in another unnumbered information frame after a time interval unless an unnumbered acknowledgment frame containing or referencing the failure message is received from the connected node. A method of path protection includes establishing plural working paths through the nodes. For each working path, an associated protection path is precalculated.

Abstract: A network element for a transport network contains a multistage lower order switching matrix with at least an input matrix stage and an output matrix stage designed to switch lower order multiplex units and with a center stage capable of switching higher order multiplex units, only, thereby connecting the input and output stages.

Abstract: Data is sent in some time slots of a forward link from a base station to at least one remote station in a wireless communication system, and voice information is sent from the base station to the at least one remote station in some other time slots of the forward link, the data being sent in a time division multiple access (TDMA) mode, the voice data being sent in a code division multiple access (CDMA) mode.

Abstract: A mechanism for providing point-to-point and point-to-multipoint connections in an ATM network converts VPI/VCI information at an ingress ATM device on incoming cells from a source endpoint to internal VP/VCI information that is used to switch the cells through an ATM network to an egress ATM device. At the egress ATM device, the internal VPI/VCI information is converted back to the source VPI/VCI information for transmission of cells to the destination endpoint. In such a manner, an ATM switch network is able to provide point-to-point connections without requiring individual configuration of VPI/VCI information at the ingress and egress ATM devices.

Abstract: A device and method for preceding data signals for pulse code modulation (PCM) transmission includes a transmitter for transmitting a sequence of analog levels over an analog channel to a quantization device, wherein the analog channel modifies the transmitted analog levels, the transmitter comprising: a mapping device for mapping data bits to be transmitted to a sequence of equivalence classes, wherein each equivalence class contains one or more constellation points; and a constellation point selector interconnected to the mapping device which selects a constellation point in each equivalence class to represent the data bits to be transmitted and which transmits an analog level that produces the selected constellation point at an input to the quantization device.

Abstract: A device and method for precoding a sequence of analog levels transmitted over an analog channel to a quantization device, wherein the analog channel modifies the transmitted analog levels, including: a mapping device for mapping data bits to be transmitted to a sequence of equivalence classes, wherein each equivalence class contains one or more constellation points; a constellation point selector interconnected to the mapping device which selects a constellation point in each equivalence class to represent the data bits to be transmitted and which transmits a level that produces the selected constellation point at an input to the quantization device; and a filter device, operably coupled to the constellation point selector, which receives at its input previously transmitted levels and provides its output to the constellation point selector; wherein the filter device has a filter response which is based on the previously transmitted levels and a target response, and the target response is adapted using an ana

Abstract: A system and device for, and method of, detecting, characterizing, and mitigating deterministic distortion in a communication system. An exemplary communication system includes a digital adaptor for sending octets on to a backbone of a PSTN, which then sends, and potentially distorts the octets, received by a line interface. The line interface converts the octets to baseband signals received by an analog adaptor. Several mechanisms and methods are described in which the analog and digital adaptor cooperate to detect the presence of distortion, in particular, robbed bit signaling, on the communication system. The characterization may then be used to mitigate the effects of the distortion. Several receive constellations are provided, each constructed in view of the transmit constellation and in view of the manner in which the deterministic distortion will distort signals transmitted over the system. The receive constellations differ from the transmit constellation.

Abstract: A transmitter for transmitting a sequence of octets over a digital network which digital network converts the octets into a sequence of levels for transmission over an analog channel to a receiver, the levels producing an analog signal having a predefined spectral shape, the transmitter including: a mapping device which receives at its input groups of data bits to be transmitted and outputs for each group an equivalence class of one or more levels, wherein at least one equivalence class contains more than one level; a level selector, operably coupled to the mapping device, for selecting the level in the equivalence class to represent the group of data bits to be transmitted; a filter device, operably coupled to the level selector and having a filter response corresponding to the predefined spectral shape, which receives at its input previously selected levels and provides its output to the level selector, wherein the level selector selects the level to be transmitted based on the output of the filter device;

Abstract: System and Device for, and Method of, Communicating According to a Trellis Code of Baseband Signals Chosen from a Fixed Set of Baseband Signal Points. Signal points are chosen from a fixed set of signal points, such as exists in the baseband signal points found in PSTN companding algorithms. These signal points are assingned to subsets and transmitted according to a predefined transmitter state sequence, representable as a trellis diagram. The subsets may overlap by sharing signal points. The sharing of signal points improves the transmission performance of the arrangement in comparison to conventional disjoint sets. The signal points are selected and associated with subsets, such that the signal points transmittable from a given transmitter states maintain a minimum distance of d, even though the full combination of signal points of all subsets need not satisfy a minimum distance of d/2.

Abstract: The method and system implement a black-out timer to schedule intermediate network topology updates in coordination with a predetermined periodic network topology update timer to minimize redundant topology updates. Topology update scheduling in accordance with the present invention provides a significant enhancement to the efficiency of topology updating.

Abstract: A mechanism and method control software overloads in a communication network system to preserve the throughput capacity of the system in a simple and efficient manner. System load is regulated by accepting, deferring or rejecting work that the system is requested to perform. The criteria used to accept, defer or reject work is based on the relevance of the request and availability of system resources.

Abstract: A device and method allocate bandwidth on internodal links in a communiation network such that worst case maximum delays and worst case average delays in a packet oriented network are guaranteed while providing statistical gains in maintaining predetermined end-to-end delay QOS objectives for different traffic types.

Abstract: A fallback strategy for a system (700) and method (200) is provided for rerouting a call that fails to be established utilizing a first set of constraints in a communication network system. This strategy enables the communication network system to utilize a look-around-first type of preemption that avoids unnecessary preemption and provides alternate routing for a call according to predetermined constraints selected by a user.

Abstract: Apparatus is described for achieving wavelength selection. Furthermore, the apparatus exhibits very high wavelength resolution, stable operation and rapid returning. A bundle of multi-wavelength light, entering the device, is acoustooptically deflected. This is done by driving two orthogonal acoustic transducrs of the deflector with two suitable frequencies fx and fy. The light so deflected passes first through a wedge etalon having a taper along the X-axis and then through a second wedge etalon having a taper along the Y-axis. The pair of wedges forms two, single-cavity etalons. Depending on the choice of fx and fy, any wavelength within the wavelength range covered by the two, single-cavity etalons can be selected rapidly and accurately.