The present invention provides a high-performance network switch. A digital switch has a plurality of blades coupled to a switching fabric via serial pipes. Serial link technology is used in the switching fabric. Each blade outputs serial data streams with in-band control information in multiple stripes to the switching fabric. The switching fabric includes a plurality of cross points corresponding to the multiple stripes. In one embodiment five stripes and five cross points are used. Each blade has a backplane interface adapter (BIA). One or more integrated bus translators (IBTs) and/or source packet processors are coupled to a BIA. An encoding scheme for packets of data carried in wide striped cells is provided.

High-performance network switch

A fast packet switch comprising one buffer directly connected between a plurality of input ports and a plurality of output ports to effect rapid throughput of data packets. A pointer to a location in the buffer is allocated by a buffer manager upon receipt of notification of an incoming packet at the receiving input port and the input port delivers the packet as it is received to the location designated by the pointer. After the data packet is received, the input port delivers the pointer and a destination address for the packet to a router, which selects one of the plurality of output ports based on the destination address. The router queues the pointer in a queue for the selected output port. The output port then retrieves the data packet from the buffer using the pointer to determine the location, and transmits the data packet. After the transmission is complete, the output port returns the pointer to the buffer manager. This packet switch may be pipelined to receive, route, and transmit simultaneously on adjacent data packets.

High bandwidth packet switch.

The present invention provides systems and methods for providing data transmission speeds at or in excess of 10 gigabits per second between one or more source devices and one or more destination devices. According to one embodiment, the system of the present invention comprises a first and second media access control (MAC) interfaces to facilitate receipt and transmission of packets over an associated set of physical interfaces. The system also contemplates a first and second field programmable gate arrays (FPGA) coupled to the MAC interfaces and an associated first and second memory structures, the first and second FPGAs are configured to perform initial processing of packets received from the first and second MAC interfaces and to schedule the transmission of packets to the first and second MAC interface for transmission to one or more destination devices. The first and second FPGAs are further operative to dispatch and retrieve packets to and from the first and second memory structures. A third FPGA, coupled to the first and second memory structures and a backplane, is operative to retrieve and dispatch packets to and from the first and second memory structures, compute appropriate destinations for packets and organize packets for transmission. The third FPGA is further operative to receive and dispatch packets to and from the backplane.

System and method for high speed packet transmission implementing dual transmit and receive pipelines

A data packet switching arrangement wherein data packets are switched into a transmission pathway according to their priority. Data packet priority is consequently determined in a ring and a priority token attributed thereto. A high priority token ensures its data packet is switched into the transmission pathway when next available. Lower priority tokens are held by respective packets until all data packet priorities have been determined and no higher priority tokens attributed, whereupon the respective data packet is switched into the transmission pathway when next determined.

Data packet switching

An apparatus for transmitting data from a first device to a second device is provided. The invention is suitable for use in a system having first and second communications media. The apparatus includes a network interface coupled to the first medium for receiving and examining data from the first device. A clustering facility is provided for coupling the first device directly to the network interface and for selectively coupling the second device to the network interface. The network interface identifies the second device as being coupled to either the clustering facility or the second medium. The apparatus transmits the data from the network interface to the second device by way of the clustering facility, if the network interface identifies the second device as being coupled to the clustering facility. The apparatus routes the data from the network interface to the second device by way of the second medium if the network interface identifies the second device as being coupled to the second medium. In the exemplary embodiment, both media follow the Consumer Electronics Bus (CEBus) standard. For example, the first medium may be a wired coaxial cable medium, and the first device may be a video cassette recorder. The second medium may be a wireless infrared medium, and the second device may be a remote control unit.

Combination brouter and cluster controller

In order to enable an expansion of a packet switched network and a constitution change thereof to be readily achieved in a multistage switched network constitution, in a packet switched network including a packet data terminal, a packet switching equipment, a PBX, a multiplexer, an LAN, a voice communication apparatus such as a telephone set, and a facsimile or in a linkage between switching modules in a packet switching apparatus, the basic switching modules called configuration units connected to the network are interconnected to each other to form a hierarchic tree structure of which the number of hierarchic levels can be selected depending on a size of the packet switched network. Furthermore, in order to increase the reliability of the packet data transfer in the multi-stage switched network configuration, there are disposed a plurality of connecting lines between bit switches and upper-level configuration units so as to establish a redundant configuration.

Packet switching equipment and a packet switching method for controlling packet switched networks

PURPOSE:To prevent a response impossibility at the time of switching, a packet loss and a call disconnection by sending out a transmission suppressing indication from a system control part to a circuit containing part related to switching to a stand-by switchboard from an existing switchboard, in the contained circuit of a packet switchboard. CONSTITUTION:When a system control part 3 detects the generation of switching, it starts processing for switching the existing and stand-by packet switching devices 1a, 1x. First of all, an instruction for switching a bus 5 connected to the device 1a to a stand-by one 5b from an existing one 5a is sent out to the device 1a, subsequently, a transmission suppressing instruction is executed to the device 1a, and when the switching is being executed, an RNR packet is sent out by using a circuit 4a from a circuit containing part 2a, and a transmitting suppression is executed temporarily. As a result, the switching device is switched to a stand-by one from an existing one.

Switching system of packet switchboard

PURPOSE: To improve the circuit efficiency by storing a header part for analysis after delaying a packet for a fixed period of time by a buffer, selecting an outgoing circuit out of the idle circuits for allocation and transmissing immediately the packet under reception to a terminating station. CONSTITUTION: The packet input received from an incoming circuit 1 undergoes the protocol processing 2 and is delayed by a buffer part 3 for a fixed short time. At the same time, a header analyzing part 4 stores the header part for analysis. A transmitting destination is detected and an outgoing circuit request signal 5 is transmitted to a conflict circuit 11. The circuit 11 chooses an idle circuit to transmit an outgoing circuit allocating signal 6 to the part 4 of a transmission requester. At the same time, the circuit 11 controls 14 the open/ close of a switch 15 by a switch control signal 12 to close a switch set within the switch 15. Thus the part 4 transmits immediately the packet under reception to a terminating station. As a result, the traffic concentration never occurs at a specific circuit. Then the delay time is shortened and the circuit availability is improved. COPYRIGHT: (C)1987,JPO&Japio

Constitution of packet exchange

In order to enable an expansion of a packet switched network and a constitution change thereof to be readily achieved in a multistage switched network constitution, in a packet switched network (1110) including a packet data terminal (111), a packet switching equipment (118), a PBX (113), a multiplexer (116), an LAN (112), a voice communication apparatus such as a telephone set (115), and a facsimile or in a linkage between switching modules in a packet switching apparatus, the basic switching modules called configuration units (4, 109) connected to the network are interconnected to each other to form a hierarchic tree structure of which the number of hierarchic levels can be selected depending on a size of the packet switched network. Furthermore, in order to increase the reliability of the packet data transfer in the multistage switched network configuration, there are disposed a plurality of connecting lines between bit switches (FIG. 3, 23-25, 40-44, 60-68) and upper-level configuration units so as to establish a redundant configuration.

Method of and apparatus for controlling packet switched networks

In order to enable an expansion of a packet switched network and a constitution change thereof to be readily achieved in a multistage switched network constitution, in a packet switched network (1110) including a packet data terminal (111), a packet switch­ing equipment (118), a PBX (113), a multiplexer (116), an LAN (112), a voice communication apparatus such as a telephone set (115), and a facsimile or in a linkage between switching modules in a packet switching apparatus, the basic switching modules called configu­ration units (4, 109) connected to the network are interconnected to each other to form a hierarchic tree structure of which the number of hierarchic levels can be selected depending on a size of the packet switched network Furthermore, in order to increase the reliability of the packet data transfer in the multi­stage switched network configuration, there are disposed a plurality of connecting lines between bit switches (FIG 3, 23-25, 40-44, 60-68) and upper-level configu­ration units so as to establish a redundant configura­tion

Kazuyuki Hayashi

Papers

Packet switching equipment and a packet switching method for controlling packet switched networks

Switching system of packet switchboard

Constitution of packet exchange

Method of and apparatus for controlling packet switched networks

Apparatus for controlling packet switched networks