Chesson, G., "XTP/PE Overview", Proceeedings 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, pp 292-296, 1988.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....in this paper aims to give multimedia networked functionality at a reduced cost. Obviously to maintain the low cost a reduction in quality and functionality is necessary. The MEND is a self contained device that can simply be plugged into existing workstations. Other researchers [Arnould, 89] and [Chesson, 88] also see the advantage of giving the network processing overheads to an autonomous unit. The MEND devices will sit on or under a desk by a workstation, PC, or Mac. They are connected to each other by a dedicated network. MEND Fig 1. Typical MEND Set Up 2. Functionality Each MEND unit ....

Chesson, G., "XTP/PE Overview", Proceeedings 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, pp 292-296, 1988.

.... and the host processor [89, 164] Network adapters either facilitate flexibility in supporting different protocols through simple designs [46, 103, 120] or restrict flexibility, and hence improve performance, by supporting specific communication protocols and resource management strategies [37, 90]. In general, the overhead of host adapter interaction and unnecessary data movement across the system bus can limit the amount of useful concurrency between the software and hardware portions of the protocol stack, thus affecting communication subsystem performance. The design of high speed ....

G. Chesson, "XTP/PE overview," in Proc. Conference on Local Computer Networks, October 1988.

....between two entities. The networks like fiber optics are providing not only greater bandwidth but also lower error rate. The performance bottleneck in the hierarchy of the communication system has shifted from the hardware component to the protocol processing layer. High speed protocols [4, 5, 6, 8] are discussed to take advantage of underlying high speed networks like FDDI and networks of several Gbps [1] XTP [5] is designed to be implemented in a lightweight protocol by using VLSI chips. XTP uses new concepts, rate based flow control , selective retransmission, and reliable multicast. ....

....The performance bottleneck in the hierarchy of the communication system has shifted from the hardware component to the protocol processing layer. High speed protocols [4, 5, 6, 8] are discussed to take advantage of underlying high speed networks like FDDI and networks of several Gbps [1] XTP [5] is designed to be implemented in a lightweight protocol by using VLSI chips. XTP uses new concepts, rate based flow control , selective retransmission, and reliable multicast. VMTP [4] and NETBLT [6] provide the rate based flow control and selective retransmission mechanisms. VMTP supports ....

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Chesson, G., "XTP/PE Overview," Proc. of the IEEE 13th Conf . on Local Computer Networks, 1988, pp.292-296.

....hence guarantee an ongoing level of service. It is also important for the protocols implementing streams to allow a level of control of transmission which enables a manager to intervene if continuous synchronisation is lost . We believe that rate based protocols, such as NetBlt [Clark,88] XTP [Chesson,88] and VMTP [Cheriton,86] are promising in both these respects. Rate based protocols have specially designed flow control strategies to ensure a steady transmission rate of data. These protocols are also able to act upon control operations such as start and stop with low latency; this feature is ....

Chesson, G., "XTP/PE overview", in 13th Conference on Local Computer Networks, IEEE Computer Society, October 1988, pp. 292-296.

....in which few cells may be in transit between Leland Window Based Congestion Management 2 one source and its destination. As an alternative approach to access control, rate based windows [3] leaky buckets or input throttles ) have recently received much attention in the industrial [4] [5] 6] 7] and academic [8] 9] 10] research communities. A leaky bucket forces a traffic source not to exceed some specified average rate of traffic input (over some interval) and some specified burst length (maximum sequence of consecutive cells at the peak input rate) Within those ....

Greg Chesson, "XTP/PE Overview," pp. 292-297, Proceedings of the 13th Conference on Local Computer Networks, IEEE Computer Society (October, 1988).

....operating system environment, the dependent parts of the LSE need to be re implemented to match the new environment. The environment dependent modules include: 4.1. Buffer Management How to construct and manipulate messages is of extreme importance when designing high performance protocols [Bir84a, Che88a, Hut89a, Dru92a, Sch89a, Ber89a]. Former research pointed out that operations on message buffers are often bottlenecks in the performance of network software. Especially the copy operations are to be avoided. Although an effort has been made to design the LSE buffer management as efficient as possible, the avoid to copy rule ....

Greg Chesson, "XTP/PE Overview," 13th Local Computer Network Conference, Minneapolis-USA (October 1988).

....processing, is advocated. Current transport protocols designed for high speed networks include, e.g. Delta t Transport Protocol, cf. Wat89] Network Block Transfer Protocol (NETBLT) cf. CLZ87] Versatile Message Transaction Protocol (VMTP) cf. ChW89] Express Transport Protocol (XTP PE) cf. [Che88], and the protocol designed by Netravali et al. and described in [NRS90] The literature suggests general agreement among network designers that transport protocols should be tailored to meet the various transport service requirements of end users. Requirements of various users can be supported by ....

G. Chesson, "XTP/PE Overview", 13th Conf. on Local Computer Networks, IEEE Comp. Soc. (October, 1988), 292-296.

.... with Saltzer s systems design principles [Saltzer,84] avoidance of multiplexing [Tennenhouse,90] recommendations for structuring communications protocols such as application layer framing and integrated layer processing [Clark,90] and the use of hardware assists for protocol processing [Chesson,88] Zitterbart,92] 2.3 QoS Specification QoS specification is concerned with capturing application level quality of service requirements and management policy and is generally different at each system layer and is used to configure and maintain QoS mechanisms resident at each layer. For example, ....

....systems support for quality of service see [Hutchison,94] 3.2.3 Transport Layer A number of research teams have investigated the provision of quality of service at the transport layer. Early work specifically addressed the provision of rate based protocols over high speed networks, e.g. XTP [Chesson,88] and NetBlt [Clark,87] More recently protocols have emerged which are designed specifically to meet the needs of continuous media. The Esprit OSI 95 project proposed an enhanced transport service and protocol called TPX [Danthine,92] TPX provides support for connection oriented services with ....

Chesson, G., "XTP/PE Overview", Proc. 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, 1988.

.... for high performance in accordance with Saltzer s systems design principles [5] avoidance of multiplexing [6] recommendations for structuring communications protocols such as application layer framing and integrated layer processing [7] and the use of hardware assists for protocol processing [8] [9] 2.2 QoS Specification QoS specification is concerned with capturing application level quality of service requirements and management policies. QoS specification is generally different at each system layer and is used to configure and maintain QoS mechanisms resident at each layer. For ....

....operating systems support for quality of service see [1] 3.3 Transport Layer A large number of research teams have investigated the provision of quality of service at the transport layer. Early work specifically addressed the provision of rate based protocols over high speed networks, e.g. XTP [8] and NetBlt [44] More recently protocols have emerged which are designed specifically to meet the needs of continuous media. The Esprit OSI 95 project has proposed an enhanced transport service and protocol called TPX [45] TPX provides support for connection oriented services with sequenced ....

Chesson, G., "XTP/PE Overview", Proc. 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, 1988.

....number of redundant packets h and not of the number of data packets k. Our performance analysis for this FEC scheme shows that for a small h=k ratio (e.g. h=k = 0:1) FEC is very effective and can reduce the TPDU loss rate by several orders of magnitude [12] In Table 2 we compare TP with XTP [13], another high speed transport protocol, and TCP [14] a widely used transport protocol. Mechanisms TP XTP TCP Connection management Timer Handshake Handshake Lifetime enforcement Yes No No Reliability ARQ FEC ARQ ARQ Acknowledgment amount Complete Partial Partial Acknowledgment type ....

G. Chesson, "XTP/PE overview", Proc. 13th Conf. on Local Computer Networks, pp. 292--296, Minneapolis, MN, October 1988.

.... for high performance in accordance with Saltzer s systems design principles [5] avoidance of multiplexing [6] recommendations for structuring communications protocols such as application layer framing and integrated layer processing [7] and the use of hardware assists for protocol processing [8] [9] 2.2 QoS Specification QoS specification is concerned with capturing application level quality of service requirements and management policies. QoS specification is generally different at each system layer and is used to configure and maintain QoS mechanisms resident at each layer. For ....

....operating systems support for quality of service see [1] 3.3 Transport Layer A large number of research teams have investigated the provision of quality of service at the transport layer. Early work specifically addressed the provision of rate based protocols over high speed networks, e.g. XTP [8] and NetBlt [44] More recently protocols have emerged which are designed specifically to meet the needs of continuous media. The Esprit OSI 95 project has proposed an enhanced transport service and protocol called TPX [45] TPX provides support for connection oriented services with sequenced ....

Chesson, G., "XTP/PE Overview", Proc. 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, 1988.

.... for high performance in accordance with Saltzer s systems design principles [5] avoidance of multiplexing [6] recommendations for structuring communications protocols such as application layer framing and integrated layer processing [7] and the use of hardware assists for protocol processing [8] [9] 2.2 QoS Specification QoS specification is concerned with capturing application level quality of service requirements and management policies. QoS specification is generally different at each system layer and is used to configure and maintain QoS mechanisms resident at each layer. For ....

....operating systems support for quality of service see [1] 3.3 Transport Layer A large number of research teams have investigated the provision of quality of service at the transport layer. Early work specifically addressed the provision of rate based protocols over high speed networks, e.g. XTP [8] and NetBlt [44] More recently protocols have emerged which are designed specifically to meet the needs of continuous media. The Esprit OSI 95 project has proposed an enhanced transport service and protocol called TPX [45] TPX provides support for connection oriented services with sequenced ....

Chesson, G., "XTP/PE Overview", Proc. 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, 1988.

....[Shepherd90] Consequently, there has recently been considerable research activity directed towards the development of communication architectures for multimedia systems. Early work addressed the provision of new transport services designed to operate over high speed networks, e.g. XTP [Chesson88] and NetBlt [Clark87] Such protocols are often referred to as rate based because of their reliance on clock driven rather than window based flow control. More recently, protocols have emerged which are designed specifically to meet the needs of continuous media, e.g. TPX [Baguette92] CMTP ....

Chesson, G., "XTP/PE Overview", Proceedings 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, pp 292296, 1988.

....between the software and hardware portions of the protocol stack. Single port network adapters either facilitate flexibility through simple designs [15 18] or restrict flexibility, and hence improve performance, by supporting specific communication protocols and resource management strategies [19, 20]. This paper proposes architectural support for managing communication in point to point distributed systems. In particular, we present flexible, integrated hardware for routing and switching which supports, but does not dictate, higher level host policies. Section 2 discusses the influence of ....

G. Chesson, "XTP/PE overview," in Conference on Local Computer Networks, October 1988.

....(see section 3.2.1) As shown in figure 2, the distributed system support layer is in turn supported by a transport sub system. This transport sub system includes an experimental protocol specifically designed for continuous media [Shepherd,91] which uses rate based flow control [Cheriton,86] Chesson,88] Clark,87] The purpose of the orchestration services is to provide synchronisationsupport# for continuous media applications. Support is provided for two categories of synchronisation identified in section 2.1, i.e. continuous synchronisation and event based synchronisation. The orchestration ....

Chesson, G., "XTP/PE Overview", Proceedings 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Miniapolis, Minnesota, 1988, pp. 292-296

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CHES88a Chesson, G., "XTP/PE Overview", 13th Annual Conference on Local Computer Networks, Minneapolis, Minnesota, October 1988.

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. G. L. Chesson. "XTP/PE Overview". Proceedings of the 13th Conference on Local Computer Networks (October 1988), 292-296.

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, G. Chesson, "XTP/PE Overview", Proceedings 13th Conference on Local Computer Networks, Minneapolis, Minnesota, 1988,pp.# 292-296.

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Chesson, G., "XTP/PE Overview", Proceedings 13th Conference on Local Computer Networks, Pladisson Plaza Hotel, Minneapolis, Minnesota, pp 292296, 1988.

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