Fast packet switching

About: Fast packet switching is a research topic. Over the lifetime, 5641 publications have been published within this topic receiving 111603 citations.

Methods of controlling data rate in wireless communications systems

Abstract: In an aspect of the method, a received data packet is decoded in order to determine a packet error rate value, and an average package error value for N received data packets is updated based on the determined packet error rate value. The updated average packet error rate value is then compared against a threshold value and a data rate request is issued based on this comparison. In another aspect, a response to a transmitted data packet is received, the response being related to an average packet error rate value. The average packet error rate value is compared against a threshold and a data rate is modified based on the comparison. In each of the above aspects, a data rate control margin that is used to overcome channel estimate errors resulting from transmission delays may be dynamically adjusted, e.g., in real time, in order to optimize system resources.

Method and apparatus for measuring one-way delay at arbitrary points in network

Abstract: Timestamps are inserted into trace packet expiration messages to identify delay in a network. A Time To Live (TTL) value in the trace packet is varied to intentionally cause an intermediate node in the network to discard the trace packet and send back the packet expiration message. The intermediate node sending the packet expiration message inserts a time value in the message indicating when the intermediate node received the trace packet. The time value is then used to determine the time required for the trace packet to reach the intermediate node.

System and method for packet messaging and synchronization

Abstract: System and method for packet messaging and synchronization through a packet based display interface includes using a multiple packet transport protocols, translating packet messages between protocols and achieving time code synchronization with a packet protocol between multiple devices in a multimedia network. A packet based display interface includes a dual data transport module to communicate packet messages using first and second packet transport protocols across a bidirectional link and a media transport module to communicate video packets across a unidirectional link. A method for communicating packet messages between source and slave devices in a multimedia network includes translating messages between different packet transport protocols. An apparatus for synchronizing a sink device to a source device includes a counter module configured to be adjusted based on a received source global time code value and a transport module to transmit a sink global time code value to the source device.

Packet data flow control method and device

Abstract: In packet data flow control wherein point-to-multipoint communication or point-to-point communication is performed in a network comprising one or a plurality of packet exchanges that respectively accommodate a plurality of communication terminals, reduction of the transmission bandwidth or lowering of transmission rate caused by local congestion is absorbed by providing buffers for absorbing difference between the transmission bandwidths of the upstream link and downstream links of these packet exchanges at each packet exchange. At the packet exchanges the transmission rate of the downstream links from the packet exchange is controlled in accordance with a first load data that is notified thereto from the downstream links and, if the difference of transmission bandwidth of the upstream link and downstream links cannot be absorbed by the buffer, a second load data is generated based on the first load data and the free capacity of the buffer and the upstream link of the packet exchange is notified of the second load data.

Multi-hop, 40 Gbit/s variable length photonic packet routing based on multi-wavelength label switching, waveband routing and label swapping

Abstract: Three-hop, 40 Gbit/s, variable length all-optical packet routing with over 120 km transmission based on multi-wavelength label switching, waveband routing (label merge), and all-optical label swapping has been demonstrated experimentally for the first time. The details are expressed in the presentation.