摘要:
A data sending method, where the method includes receiving, by a forwarding device using a first flexible Ethernet (FlexE) group and in multiple timeslots included in a first timeslot set, multiple first encoded data blocks from a physical coding sublayer (PCS), determining, by the forwarding device according to the timeslots included in the first timeslot set and the first FlexE group, a second FlexE group and multiple timeslots included in a second timeslot set, and sending, by the forwarding device, the first encoded data blocks using the second FlexE group and in the timeslots included in the second timeslot set. The forwarding device does not need to process the first encoded data blocks in a conventional layer 2 or layer 3 forwarding mode. Therefore, a processing delay can be reduced, and a transmission delay can be reduced.
摘要:
An avionics switched full-duplex Ethernet communication Arinc 664p7 network (100) includes at least two independent elementary networks (N1, N2). Each elementary network includes one or more end systems (ESI) suitable to act as source end systems for data frames transmitted over the network, and one or more end systems (ES4) suitable to act as destination end systems for such data frames. Each elementary network further includes a switching function block (SW1, SW2) connected between the source (ESI) and destination (ES4) end systems. The Ethernet network is has one of the source (ESI), destination (ES4) end systems and the switching function block (SW1, SW2) includes timers (204) suitable to generate a common piece of timing information to be sent to the other devices of the elementary network in-order to enable the transmission of the data frames over the elementary network by one of the source end systems (ESI).
摘要:
In an orthogonal frequency division multiple access (OFDMA)-based wireless mesh network, a communication node receives information regarding a next transmission time of a 1-hop node and a 2-hop node through the 1-hop node, calculates next transmission intervals of the 1-hop node and the 2-hop node, determines a next transmission time of the communication node by using the next transmission intervals of the 1-hop node and the 2-hop node, and then transmits, to an 1-hop node of the communication node, the information of the next transmission time together with the information of the transmission time of the 1-hop node, received from the 1-hop node.
摘要:
A method is disclosed of assessing timeslot interoperability between a first platform and a second platform communicating over a Time Division Multiple Access network. An exemplary method includes obtaining data representing a metamodel of communication characteristics of the first platform and the second platform, the metamodel including information regarding at least transmit timeslots for the first platform, and information regarding at least receive timeslots for the second platform. The method can be queried to assess interoperability between the transmit timeslots and the receive timeslots, for outputting timeslot interoperability data based on a result of the querying.
摘要:
In one embodiment, a switching system includes a backplane and multiple cards that each support multiple ASIC devices. Each ASIC device is associated with a subset of the network interfaces associated with the switching system. At least one ASIC device on a card may communicate switched data to an outgoing network interface associated with the card. Remaining ASIC devices on the card may communicate switched data to one or more other cards, using the backplane, for communication to one or more outgoing network interfaces associated with the other cards. In another embodiment, a device for switching data from a first bus to a second bus in a TDM switching system is provided. In another embodiment, a method for switching data between a plurality of network interfaces in a switching system is disclosed.
摘要:
A digital cross-connect switching system that has a single-stage architecture, a scalable bandwidth, and reduced connection memory storage requirements. The scalable bandwidth digital cross-connect switching system includes a plurality of digital cross-connect building blocks. Each digital cross-connect building block includes at least one cross-connect having a plurality of input ports and a plurality of output ports, at least one connection memory communicatively coupled to the cross-connect, and at least one OR gate. Bandwidth is scaled in the digital cross-connect switching system by interconnecting predetermined numbers of the digital cross-connect building blocks. In general, the size of the digital cross-connect switching system increases as the square of the bandwidth requirement.
摘要:
The present invention provides an improvement in circuit switching for a network comprising a switching apparatus including a plurality of transceivers for interfacing directly with a like plurality of nodes. Each of the transceivers has a receive and transmit through port for passing data to and from nodes. Transmitted data includes a connect/disconnect sequence, a first wait sequence, and user data. The switching apparatus further includes circuitry for isolating each transceiver so as to loop back data when not in use and a switching matrix for directly connecting any pair of transceivers. Each of the transceivers includes circuitry for detecting a connect and disconnect sequence and an interface for connection to a serial asynchronous receiver to derive node requests, routing data, priority and other information from the connect sequence detected at the transceiver. Derived switch configuration requests are processed by a node route control state machine, with each node route control state machine integrated in a bus architecture for configuring the matrix switch. A bus arbitration state machine controls the bus architecture servicing bus requests and providing bus grants for the transfer of routing information to switch control logic and a command sequencer. The requesting node may set a priority for a connection request, queue a connection request or alternatively request data from the switch controller micro-controller core.
摘要:
A method for implementing switching in the time or space domain, in which the switching is effected on the basis of switching data contained in an address control memory, and a basic switching block is defined on the basis of an incoming frame structure so that the number of its time slots corresponds to the greatest possible number of signals of the lowest level of hierarchy to be switched in the frame. The basic switching block recurs in the same form with respect to switching. In order for the switching to be simplified: (i) the number of the switching instructions to be stored in the address control memory corresponds to the size of the basic switching block, whereby when the basic switching block also contains higher-level signals, the same switching instruction is used in the address control memory at given intervals, depending on how the signals occur in the basic switching block, (ii) the same address control memory is read during the entire frame structure, whereby it gives a switching instruction to all time slots in the frame, and (iii) the switching instructions read from the address control memory are skipped during the time slots which are not cross-connected.
摘要:
In a system and method of communication between circuit mode units interconnected by point-to-point circuits in a subnetwork at the core of a communication installation the point-to-point circuits between units are structured and managed identically. A communication circuit is incorporated in each unit of the subnetwork, irrespective of the control unit, auxiliary unit or telephone and/or communication terminal interface controller type. This communication circuit handles the broadcasting over the point-to-point circuits to the other units of data from time-division multiplex circuits connected to it and switching of bytes addressed to it over the circuits.
摘要:
When a group communication group call is initiated in a multi-site communication system, the communication processing information for that particular communication group call must be established. The communication processing information is formatted by a central controller which in turn transfers that information to a destination data base of a processing multiplexer switch. The information is then stored in the destination data base such that the particular communication group call may be quickly processed. When the communication unit that initiated the call ceases to transmit and another communication unit begins to transmit, the communication processing information is updated to reflect the change in the transmitting communication unit. This continues to happen until the particular communication group call has ended; once it has ended, the communication processing information is deleted from the destination data base.