High-speed Protocol Processing Research Articles

Parallel architecture support for high-speed protocol processing

A rapid increase in the transmission bandwidth of optical networks has created a bottleneck in protocol processing at the host systems. This paper presents a high-performance transport protocol, HTPNET, that is designed to exploit the evolving characteristics of high-speed networks. Importantly, the highly parallel architecture of HTPNET provides a suitable platform for the parallel implementation of presentation processing, which incurs high computation overheads. A parallel architecture based on the T9000 transputer and C104 router technology has been designed to support high-speed protocol processing. A simulation of the architecture has been implemented and has demonstrated the advantage of exploiting a parallel architecture for protocol processing.

Multiprocessing in multiprotocol routers

High-speed networks place strict requirements on the architecture of communication subsystems. One of the most significant problems in conventional subsystems is provision of high-speed protocol processing. The protocol processing problem is especially significant in the environment of multiprotocol routers where several routing protocols are supported. A multiprocessor architecture for high-speed processing in multiprotocol environments is presented and analyzed. It is shown that exploitation of vertical and horizontal parallelism in protocol stacks combined with parallelism in memory accesses and packet memory management significantly increases system performance. The presented architecture, used in realistic environments, meets the throughput requirements of high-speed network links offering throughput up to 100 Mbps.

High-speed hardware architecture for high-definition videotex system

A high-speed hardware architecture for an experimental high-definition videotex system for a broadband integrated services digital network is introduced. The key technologies required are high-speed protocol processing, high-speed data transfer, and highspeed picture readout from disks. High-speed protocol processing using a newly developed virtual memory copy, content rearrangement memory, two-bus architecture, and simultaneous editing and analyzing allows a requested 6-MB picture to be displayed within 3s.

Distributed multimedia applications on gigabit networks

MultiG, an open research program addressing issues that range from end-user requirements on distributed multimedia applications supporting collaborative work to medium-access protocols for multi-gigabit networks on optical fibers, is discussed. The projects in MultiG are described from the top down, beginning with computer-supported cooperative work. Distributed multimedia applications and application generators are then considered, followed by networking issues, including interprocess communication, transport services, network protocols, and high-speed protocol processing. Testbed activities and future plans are described.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

High-Speed Packet Switching Systems for Multimedia Communications

High-speed packet switching (HPS) systems can Provide flexible, economical, high-quaiity services for integrated voice, video, and data communications. To realize such HPS systems, methods have been developed to bring about high-speed protocol processing as well as a system architecture for facilitating high-throughput switching. Adopting the parallel processing algorithm into protocol processing allows us to achieve high-speed packet protocol processing of about 100 times faster than conventional processing. Furthermore, a fully distributed system architecture in addition to hierarchical interconnection networks can achieve high-capacity packet switching systems. The proposed HPS system is thus capable of accommodating lines of up to 10-50 Mbits/s, of providing high-throughput switching capability of 1 000 000 packets/s, and of having an average delay of less than 2 ms. Furthermore, an evaluation of network delay performances of video conferencing and voice communications indicate that HPS systems are quite suitable for handling such multimedia communications.