Abstract:
A network element (14) can be configured for connection to any portion of a communication network: access, transport and core (16) Moreover, a single network element can be configured to couple subscriber equipment directly to the core portion of the network, thereby permitting the subscriber to bypass the transport portion of the network. Specifically, such a network element can be configured to include a line unit that supports subscriber equipment (also called a "subscriber line unit"), and also to include a line unit to support a link to the core of the communication network (also called a "core line unit"). The subscriber line unit and core line unit are both installed in a single chassis, and each unit can be installed in any of a number of slots in the chassis. Moreover, when configured with appropriate line units, such a network element may support traditional circuit-switched telephony services while simultaneously delivering packet-based voice or data services. The network element (14) provides multi-class service over the entire range of the network because it employs a common switch fabric for handling both synchronous and asynchronous traffic over a common bus.
Abstract:
Telecommunication equipment includes a TDM interface (18) operable to receive STS-n data, and a packet interface (32) operable to receive packet/cell data and filling a STS-MC payload with the packet/cell data. An n x n cross-connect (20) is coupled to the TDM interface (18) and operable to switch and assign the STS-n data to any one of n STS-1 time slots. A multiplexer (24) is coupled to the cross-connect (20) and the packet interface (32) and operable to combine the switched STS-n data and the STS-MC packet/cell data into an STS-n payload for transport, where N is the sum of n and M.
Abstract:
The present invention relates to third generation cellular networks and, in particular, to the backbone ATM switching network between a base station and other base stations or other networks. The present invention seeks to provide a 3G cellular communications system with a reduced likelihood of failure. In accordance with a first aspect of the invention there is provided a third generation wireless communications network including a plurality of base station radio interfaces which provide cellular wireless coverage; at least one Node B and a radio network controller. The system is configured such that there are at least two signal paths between the said at least one node and the radio network controller whereby to provide an IMA protection mode or an IMA aggregation mode.
Abstract:
A transmission lines arrangement comprising a first plurality of transmission lines (I n1 ,._.,I nn ) each transmission line having an effective characteristic impedance (Z eff ). The arrangement further comprises a second plurality of transmission lines (0 1 ,,...,O m ), said first plurality of transmission lines being coupled to a plurality of switching elements (V - I conv ). The plurality of switching elements are conceived to redirect an input signal from one transmission line of the first plurality of transmission lines to at least one transmission line of the second plurality of transmission lines. The arrangement is characterized in that each of the switching elements of the plurality of switching elements have a relatively high input impedance in comparison with the effective characteristic impedance and a relatively high output impedance in comparison with the effective characteristic impedance. Furthermore, each transmission line of the first plurality of transmission lines is further coupled to an impedance that is substantially equal to the effective characteristic impedance of said transmission line.
Abstract:
The invention relates to a packet switching device comprising at least one line card (1 and 2) with a port control (6 and 7) for storage and arrangement of packets in output queues and for generating status information of the output queue, and at least one switch card (3 to 5) consisting of a crosspoint matrix (8) and an arbiter (9) to control the crosspoint matrix (8), the port control (6 and 7) being provided for distributing the status information over several arbiters (9). Each responding arbiter (9) is provided to cyclically receive a respective part of the status information from the port control.
Abstract:
An AAL2 path group (60) comprises plural AAL2 paths (35). Bandwidth of an individual AAL2 path comprising the AAL2 path group is contributed to a total bandwidth of the AAL2 path group rather than to the individual AAL2 path exclusively. An admission decision regarding a connection seeking to use an AAL2 path belonging to the AAL2 path group is based on available bandwidth of the AAL2 path group rather than available bandwidth of an individual AAL2 path. ATM VCCs which comprise the AAL2 path group are transported on a virtual path (VP) together with ATM VCCs of a different type (e.g., a second type which differs from a first type of ATM VCC which comprise the AAL2 path group). The AAL2 path group also features quality of service (QoS) separation, e.g., differing treatment for differing AAL2 connections within the AAL2 path group based on the QoS requirements for the differing AAL2 connections.
Abstract:
The present invention discloses a method based on backplate transmitting Time division Multiplexing (TDM) circuit data and TDM bridge connector used to carry out said method. This method comprises the steps of: connecting the center switch network board to each service board by high-speed serial lines on backplate circuit; transmitting in banches through said backplate high-speed serial lines after multiplex connect Time Division Multiplexing (TDM) circuit data on transmission side, separately connecting each Time Division Multiplexing (TDM) circuit data after serial receiving on receiving side. Bridge connector comprises: TDM high-speed serial transmitting adapt circuit, TDM high-speed serial receiving adapt circuit. The present invention improves the circuit transmitting capability greatly and loose the requirement of clock synchronization, for the advantage of the high-speed serial signal itself, the reliability of system also improved greatly.
Abstract:
A method and apparatus for alignment of TDM-based signals for packet transmission using framed and unframed operations are described. In an embodiment, a line card (502) in a network element includes a deframer (602) unit that receives a Time Division Multiplexing (TDM) signal. The TDM signal includes a payload and overhead data. The deframer (602) generates frame alignment data based on the overhead data. The line card (502) also includes a packet engine (604) unit coupled to the deframer (602). The packet engine (604) receives the payload, the overhead data and the frame alignment data and generates a number of packet engine packets. The packet engine packets represent a frame within the TDM signal such that the packet engine packet include the payload, the overhead data and the frame alignment data. Additionally, the line card (502) includes a packet processor (606) coupled to the deframer (602). The packet processor (606) receives the packet engine packets and generates network packets based on the packet engine packets.
Abstract:
An illustrative intelligent network and method for providing voice telephony over Asynchronous Transfer Mode ("ATM") and private address translation are provided that can provide significant advantages. The method inlcudes generating an input ATM setup message at the calling party CPE that includes a VToA designator and a called party phone number (806), extracting information from the input ATM setup message such as the VToA designator and the called party phone number (812), analyzing the information (814), designating an ATM address of a called party CPE to be stored in the first parameter of an output ATM setup message (816), determining if private address translation is needed (818), designating the ATM address of the called party CPE to be stored in a first instance of the second parameter of the output ATM setup message (820).
Abstract:
The present invention is directed toward data packet transmission scheduling. Scheduling values, such as priority or other scheduling criteria assigned to data packets, are placed in a heap data structure(700). Packets percolate up through the heap by comparing their assigned values in pairs(816). Operations in the heap may be pipelined so as to provide for high-speed sorting(1000). Thus, a few relatively simple operations can be performed repeatedly to quickly percolate packets up trough the heap. Another aspect of the invention provides for fast traversal of the scheduling heap data structure. The hierarchical heap may include a highest level having a single position and each succeeding lower level having twice the number of positions as the preceding level(700). A binary number may represent each position in the heap(806). To traverse the heap, the relative movements necessary to move from one position to another may be determined from the binary number(818).