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Teletraffic Symposium, 8th. IEE Eighth UK

Date 10-12 Apr 1991

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Displaying Results 1 - 20 of 20
  • Bandwidth allocation in a channelised ATM network

    Publication Year: 1991, Page(s):4/1 - 4/7
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (384 KB)

    ATM is now generally seen as the ultimate solution for the proposed broadband integrated services digital network (BISDN). In the BISDN, it is likely that the transmission facilities will be subdivided into fixed rate channels at approximately 150 Mb/s. A fiber optic link operating at several Gb/s is able to support many channels. The collection of channels multiplexed on the same transmission lin... View full abstract»

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  • Studies of queueing delay and cell loss for combined traffic sources in ATM networks

    Publication Year: 1991, Page(s):3/1 - 3/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    The development of broadband ISDN based on the ATM introduces new network characteristics different to those traditional channel based networks, typically queueing delay and cell loss when combined traffic sources share the same bandwidth capacity. The paper reports the work on studying the new network characteristics so that the bandwidth resource can be utilised efficiently with restricted queue... View full abstract»

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  • Some aspects of traffic management in frame relay networks

    Publication Year: 1991, Page(s):23/1 - 23/6
    Cited by:  Patents (18)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (340 KB)

    Frame relay is a high speed packet switching technology which has evolved as part of narrowband ISDN. The maximum link access speed is 2 Mbps, as in primary rate ISDN, and the access protocol is LAPD-based. Multiplexing of logical channels is therefore a layer 2 function which obviates the need for any layer 3 processing at network nodes. In addition, when frame relay is compared with X.25, only a... View full abstract»

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  • Synchronous ATM-an analysis of a call-packing algorithm

    Publication Year: 1991, Page(s):2/1 - 2/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (312 KB)

    The author considers a scenario where a large number of STM-1 (155 Mbit/s) interfaces each carrying about 2000 individual speech channels are switched by ATM. The following methods of reducing delays have been suggested: (i) more than one call per cell-four or five were identified as desirable; and (ii) short cells, i.e. only 20-25% of data payload occupied. The paper attempts to analyse some of t... View full abstract»

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  • Footprints for mobile communications

    Publication Year: 1991, Page(s):22/1 - 22/4
    Cited by:  Papers (1)  |  Patents (5)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (172 KB)

    One of the many requirements of the asynchronous transfer mode (ATM) standard being defined for a broadband integrated services digital network (B-ISDN) is that it be able to support all the services currently provided by existing separate networks. One service of particular interest is mobile communications. In order to support this projected expansion it will be necessary to progressively reduce... View full abstract»

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  • Computer modelling: the performance of ATM switch fabric architectures

    Publication Year: 1991, Page(s):12/1 - 1212
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (444 KB)

    Investigates the performance of various architectures proposed for ATM switch fabrics, using computer simulation techniques. As the overall objective of the study is to further understand how various configurations of switching elements, queue positions and queue lengths affect the performance of the switch fabric, a general-purpose simulator is required that is able to model the many possible arc... View full abstract»

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  • IEE Eighth UK Teletraffic Symposium

    Publication Year: 1991
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (28 KB)

    The following topics were dealt with: ATM networks; circuit switching; simulation and tools; local area networks (LAN); and performance engineering issues such as telecom traffic management and network reliability View full abstract»

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  • The performance of digital circuit multiplication equipment (DCME)

    Publication Year: 1991, Page(s):20/1 - 20/7
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (388 KB)

    Uses an analytic model to assess the effectiveness of various dynamic load control (DLC) techniques, which attempt to ensure that the performance of digital circuit multiplication equipment (DCME) systems is acceptable. A number of different international traffic profiles are examined, and recommendations for the use of DLC are made. A DCME terminal typical has 120 or 150 input channels, and 30 ou... View full abstract»

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  • A modular simulator for ATM based B-ISDN communication networks

    Publication Year: 1991, Page(s):11/1 - 11/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    The need for high speed simulation to allow the modelling of broadband integrated services digital network systems has lead to the development of various parallel simulation engines which require synchronisation schemes. The fast rate of hardware and software developments, the mode of production of large systems and the need to compare synchronisation schemes require the development of a modular s... View full abstract»

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  • Traffic shaping in asynchronous transfer mode networks

    Publication Year: 1991, Page(s):19/1 - 19/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    Attention in performance engineering studies of ATM (asynchronous transfer mode) networks is beginning to focus on high level issues such as specification of the contract between network and customer, and management of bandwidth in the network. The paper deals with one aspect of the contract between network and customer, namely charging. It describes a means by which customers may reduce the burst... View full abstract»

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  • A graphical tool for visualising the performance of a X.25 packetised communication line

    Publication Year: 1991, Page(s):10/1 - 10/5
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (336 KB)

    Summarises the development of a graphical monitoring tool, XScope, for visualising the performance of X.25 packet switched communications lines. XScope is essentially a protocol analyser, but it adopts a graphical approach rather than the common textual display. The graphical interface also provides the user with an instant overview of the overall performance of the protocols, providing additional... View full abstract»

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  • Single-moment analysis of unreliable trunk networks: two methods for the network grade-of-service

    Publication Year: 1991, Page(s):8/1 - 811
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (512 KB)

    Traditionally, research into circuit-switched (C-S) communications networks has been divided into two areas, reliability and performance. The combined performance and reliability measure chosen is the network grade-of-service (NGOS), i.e. the overall probability of blocking, averaged over all node pairs, taking into account both the offered traffic between node pairs and the link (trunk group) ava... View full abstract»

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  • Adaptive ATM call access control using learning algorithms

    Publication Year: 1991, Page(s):18/1 - 18/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    The broadband integrated services digital network (B-ISDN) is an emerging communication network which is intended to provide multimedia services to its customers in a flexible and cost-effective manner. The traditional transport paradigm used for ISDN is synchronous transfer mode (STM). However, the asynchronous transfer mode (ATM) has attracted significant attention as a transport paradigm for B-... View full abstract»

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  • Sticky random routing in dual-parented networks

    Publication Year: 1991, Page(s):6/1 - 6/5
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (212 KB)

    Considers the application of dynamic routing strategies to dual-parented networks. Dual-parented networks consist of a fully connected set of nodes, called parent nodes, together with clusters of local nodes connected in each case to two parent nodes. The number of clusters is the same as the number of parent nodes. Such network architectures resemble the upper tiers of the British Telecom nationa... View full abstract»

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  • A multichannel bit-map protocol for very high speed optical fibre multiple access networks

    Publication Year: 1991, Page(s):14/1 - 14/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    The network architecture considered is a fibre optical star network with per-node-per-channel structure (PNPC), i.e. the number of channels is equal to the number of nodes. With the PNPC structure users that require very large traffic throughput can be accommodated. The PNPC structure is compatible with wavelength division multiplexing (WDM). It is also favoured in optical subcarrier multiplexing ... View full abstract»

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  • Parallel simulation for performance modelling of telecommunication networks

    Publication Year: 1991, Page(s):9/1 - 9/6
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (432 KB)

    Dramatic advances are expected in the extensive use of parallel multiprocessor architectures to speed-up simulation. However, the use of parallel simulation has its own attendant issues. These include the hardware architecture, the decomposition approach used to produce the parallel software processes, mapping these processes onto the processors and the synchronization of the resulting parallel si... View full abstract»

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  • Decentralised routing strategies in sparsely connected circuit switched networks

    Publication Year: 1991, Page(s):7/1 - 7/5
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (156 KB)

    To maintain a competitive edge it was considered essential for Dowty to investigate decentralised algorithms and in particular more advanced AI based algorithms using learning. The paper first describes the main types of decentralised routing algorithms selected for comparative study. In particular direct, fixed alternative, random routing, dynamic alternative routing and learning automata algorit... View full abstract»

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  • Routing in interconnected FDDI LANs

    Publication Year: 1991, Page(s):15/1 - 15/4
    Cited by:  Patents (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (184 KB)

    The fibre distributed data interface is a recently standardised, 100 Mbps local area network using fibre optic technology. FDDI is capable of supporting up to 500 users over a 100 km distance. As FDDI becomes widely accepted and implemented the need for interconnecting remote FDDI LANs becomes increasingly important. FDDI interconnection can be accomplished in several different ways. Methods inclu... View full abstract»

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  • Congestion and flow control in private wide area ATM network-a simulation study

    Publication Year: 1991, Page(s):16/1 - 16/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (228 KB)

    ATM is a promising technology for private network such as in business environment that requires wideband and multimedia communications. In private wide area ATM network various types of information (voice, video and data) can be statistically multiplexed onto high speed transmission streams with high efficiency. A fundamental challenge in the design of a robust B-ISDN architecture is the structuri... View full abstract»

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  • Multi-service bandwidth allocation in ATM

    Publication Year: 1991, Page(s):17/1 - 17/4
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (152 KB)

    Reports on work in progress within the CEC RACE project R1022 `Technology for ATD' on the dimensioning and management of network capacity for mixes of variable bit rate (VBR) and constant bit rate (CBR) traffic. This is also useful for connection admission control (CAC) studies, because it gives information about the quality of service to be expected for certain traffic mixes. Results indicate tha... View full abstract»

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