Abstract: A system for providing prioritized queue management within a data transmission network node that supports different types of data frame traffic is disclosed herein. The system includes a frame buffer for storing an incoming frame that has an identifiable frame type. A queue is pre-associated with the frame type of the incoming frame such that upon arrival of the frame at the network node, the queue stores a location address at which the frame is stored within the frame buffer such that the frame is maintained within the queue. The queue that contains the frame is stored within a frame table. Processing means are provided for determining a time at which the queue forwards the frame from the frame buffer in accordance with a pre-determined sub-queue priority list. The system further includes time metering means associated with the frame for temporally assigning the frame to a virtual sub-queue among multiple virtual sub-queues that are associated with the queue.

Abstract: An example application of the invention is directed to a mobile receiver searching pilot signals in a CDMA-based radiotelephone communications system. The receiver processes received pilot signals by first decimating those pilot signals that have a search window length that is greater than a threshold number of chips, into a plurality of sub-windows. The other pilot signals and the sub-windows are then searched using a common prioritization criteria. More specific implementations of this approach permit each search of this type to take a fixed amount of time, thereby making scheduling calculations easy to implement. Moreover, such implementations provide for all pilots to be searched equally often irrespective of window sizes, and for less likely candidates for idle handoff (pilots with longer window sizes) not to be given precedence over more likely idle handoff candidates.

Abstract: The mobile ad hoc network includes a plurality of wireless mobile nodes and a plurality of wireless communication links connecting the nodes together. The nodes advertise using variable beacon signals. The method includes neighbor discovery with beacon signal detection. The method includes searching for the variable beacon signals at a given mobile node using an initial detection rate and at an initial detection frequency, and increasing a detection rate from the initial detection rate up to a maximum detection rate while searching for the variable beacon signals at the initial detection frequency. The detection frequency may also be varied.

Abstract: The present invention provides an improved RACH access burst arrangement and frame structure. That is, the invention provides methods and apparatus for supporting more than one access burst length in the UMTS access channel structure. Preferably, two access burst lengths are supported, e.g., 5 ms and 10 ms. Such an arrangement is advantageous in applications where it is beneficial to have fast access latency such as, for example, voice or other forms of real-time traffic. Also, the invention provides methods and apparatus for supporting multiple frame sizes. It is to be appreciated that further enhancement to access latency can be obtained by having the UMTS physical layer support multiple frame sizes. The access burst signal transmitted by a remote terminal over the RACH may be an access request or data packets in the case where the RACH is being utilized for UMTS short message services.

Abstract: A communication device comprises reception means for receiving externally supplied first time information representing time, time information generation means for generating second time information representing time, time difference detection means for detecting a time difference between the times represented by the received first time information and the second time information generated at a time point at which the first time information is received, and correction means for correcting the second time information generated by said time information generation means based on the received first time information when the time difference is greater than a predetermined value.

Abstract: An interface for communications among network elements of at least one network is provided, comprising at least one transmitter, at least one receiver, at least one processor, and at least one backplane coupled among the network elements. Data frames of a second type, or Time Slot Network (TS Net) data frames, are generated and transferred over the backplane in response to receipt data frames of a first type from the network. The TS Net data frames comprise switching event information. Compare operations are performed among prespecified TS Net data frames at prespecified intervals, and at least one interrupt signal is generated in response to data changes determined by the compare operations. Information routing is controlled over the network by a processor in response to the interrupt signal.

Abstract: In ATM connections, a number of connections are usually transmitted over common connecting segments. Potentially newly added connections are allowed based on the measure of decisions made by acceptance algorithms. Knowledge of the momentarily reserved bandwidth is estimated step-by-step with the setup or release of connections.

Abstract: A wireless communications system employs code-division multiple access information transmission techniques where the uplink and downlink transmission bandwidths are unequal. The higher bandwidth is an integer multiple of the lower bandwidth. The present system requires a base station and a subscriber unit to have two pseudo-random code generators which can be clocked separately. Alignment of the uplink and downlink pseudo-random spreading codes is achieved by truncating the code sequence for the lower speed link at the conclusion of a complete code sequence for the higher speed link.

Abstract: A method of conjoint detection of a set of CDMA codes received at a plurality of antennas of a receiver like a mobile telephone receiver. The codes are transmitted via a transmission channel with transfer matrix A satisfying the equation e=A.d+n, where d is the set of symbols of the codes transmitted, n is an additional noise vector and e is the set of received samples.

Abstract: A method and arrangement for prioritized transmission of packets from a plurality of storage queues, each interfacing one corresponding input bitstream to one common transmission medium, is disclosed, whereby the respective queue priorities, on the basis of which access to the common transmission medium is determined, are itself dependent upon respective weigths associated to the corresponding input bitstreams. This dependency on these respective weight; relates to a respective amount of successive values of these respective queue priorities, to be selected from an arbitrary interval and sorted in a predetermined sequence.

Abstract: Flexibility is achieved in provisioning communication rings with an integrated DCS that allows any port that is connected to a line interface unit within the integrated DCS to be coupled within the integrated DCS—pursuant to software controlled provisioning—to any other port that is connected to a line interface unit within the integrated DCS. This is accomplished by merging the cross connect fabrics of the ADM portions of the integrated DCS with the cross connect fabric of the DCS portion of the integrated DCS, by incorporating at least some of the switching controls of the ADMs in the ADM portion of the integrated DCS in the controller of the DCS, and by insuring that the SONET K-bytes can be passed by the controller of the flexible integrated DCS from any line interface unit to any other line interface unit.

Abstract: A method and a system of network capacity planning for use in a high speed packet switching network. The network comprises a plurality of switching nodes interconnected through a plurality of communication links, each of the switching nodes comprises means for switching packets from at least one input link to at least one output link. Each of the output links is coupled to at least one buffer in the switching node for queuing packets before they are transmitted over the output link. In each of the switching nodes and for each of the output links, a time distribution of the occupancy of each buffer during a predetermined monitoring time period is measured, and stored in a centralized memory location. Then, the buffer occupancy time distribution data are retrieved from the centralized memory location in all the switching nodes, gathered and stored in a network dedicated server.

Abstract: A reference load model generator for testing ATM communication devices. The generator comprises an interface for specifying a frame size (FS), an inter-frame gap (IFG) and an inter-cell gap (ICG) for modelling frame sources, and generates source ATM cell streams having the specified FS, IFG and ICG of the corresponding frame source. The generator also includes a multiplexer which receives the source cell streams and generates a single output cell stream.

Abstract: In an ATM cell multiplexing apparatus for assembling data, which arrives from multiple terminal lines, into cells, time-division multiplexing the cells and transmitting them to a network, traffic management is performed in each cell assembler, based upon service category and traffic, for every channel accommodated by the terminal lines, and traffic management on a per-cell-assembler basis is performed in an ATM bus scheduler taking into consideration service categories and traffic of all channels accommodated by the cell assemblers. Further, the ATM bus scheduler creates a main schedule table and a subschedule table, which is referred to after the main schedule table, for allocating more transmission privileges to a cell assembler that accommodates a CBR channel, and grants transmission privileges to the cell assemblers upon referring to the main schedule table and subschedule table.

Abstract: A backup CRF VLAN arrangement provides an alternate, redundant path for traffic between undistributed Concentrator Relay Functions (CRFs) located on separate switches interconnected by trunk links of a distributed token ring bridge. The backup CRF virtual local area network (VLAN) arrangement defines a backup network path which may be utilized if a primary active path is not a valid path to a backup network. Notably, the backup network comprises a special type of CRF that is distributed among the switches, but that has only one port active at any given time.

Abstract: A data communication system that provides different types of service (e.g., telephone services and high-speed data transmission services) to a remote site even when the remote site lacks a splitter is disclosed. A central site (e.g., central office) is able to communicate with at least two different types of remote sites. One type of remote site includes a full splitter (i.e., both low-pass and high-pass filters), and the other type of remote site has only a partial splitter (i.e., includes high-pass filter but lacks a low-pass filter). Although conventionally the transceivers (e.g., ADSL transceivers) at these remote sites would be of the same design and use the same modulation technique for upstream as for downstream transmissions, here the remote site that lacks a low-pass filter (i.e., partial splitter type remote site) uses a different modulation technique for upstream transmissions.

Abstract: A primary communications interface card for receiving a signal is equipped with a bypass or shunting relay, the control of which is managed by a backup or protection interface card. The cable interconnect from far-end equipment to the primary interface card is provided with a make-before-break connector to the primary interface card, and a pig tail cable to the protection card. Upon command, the protection card may command the relay to shunt the signal from the far end equipment around the primary interface card to the protection card. Then, the cable may be disconnected from the primary interface card, with the make-before-break connector providing a signal path from the far-end equipment to the protection card before continuity through the shunting relay is lost. The primary interface card can then be removed and replaced, and the process reversed to redirect traffic to the primary interface card.

Abstract: A method and system for configurable and scalable line interface card protection or redundance useful for a range of low speed digital to high speed digital and optical signal types such as STS-1, STS-3, VT1.5, DS-1/T1, DS-3/T3, ATM, ADSL, HDSL, OC-1, OC-3, OC-12, OC-48, OC-192, OC-768, STM-1, STM-4, STM-16, STM-64, E1, E3, J1, J2, and EtherNet and Token Ring LAN signals. A daisy-chain alternate signal path, signal selectors, and alternate front panel entry points are provided to a front-access telecommunications shelf system. Signal interface cards can be designated as primary cards to handle traffic under normal conditions, or as protection cards, without hardware constrained or slot-specific card requirements. Variations of 1:N protection, and multiple groups of 1:N configurations and partitions can be defined without changes to cabling or backplane design variations through setting of relays and signal selectors on each card.

Abstract: Apparatus, and a method for flexibly switching telecommunication signals. A plurality of input bit streams are connected to a telecommunications switching network fabric element comprising a microprocessor system including memory. The microprocessor system, under program control, performs switching and protocol conversion functions on the input streams in order to generate output streams. Advantageously, a single element is able to concurrently switch input signals in a variety of protocols, including circuit switching protocols, such as Pulse Code Modulation (PCM), and packet switching protocols, such as Asynchronous Transfer Mode (ATM) protocols and Internet Protocol, (IP). Where desirable, the microprocessor system can also control the protocol conversion of input signals in one protocol to output signals in another protocol.

Abstract: A full service channel access protocol that supports the integrated transport of voice, video and data communications is provided by dividing a communication channel into a plurality of frames, dividing each of the frames into a plurality of slots, and dividing some of the plurality of slots into a plurality of mini-slots. The mini-slots are provided for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel. Additionally, a second one of the plurality of slots is divided into a plurality of second mini-slots for use by the multiple communication sources to request the establishment of a new voice, data, or video transmission connection over the communication channel and for use by the multiple communication sources to augment an existing video connection over the communication channel.