The Experts below are selected from a list of 18 Experts worldwide ranked by ideXlab platform
Upkar Varshney - One of the best experts on this subject based on the ideXlab platform.
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A simple scheme for interconnecting wireless networks to ATM broadband networks
Proceedings of MILCOM '96 IEEE Military Communications Conference, 1996Co-Authors: Upkar VarshneyAbstract:With the emerging ATM broadband networks and next generation wireless networks, there will be a need for connectivity between these networks. The interconnection of these networks has received some consideration in the literature. For providing seamless interconnection, it is desirable to introduce ATM technology in the wireless networks also. In an ATM network, VPI (virtual path identifier) and VCI (virtual circuit identifier) are allocated to a virtual-path consisting of switches and links between two fixed (stationary) users. However, the same is not true for wireless networks due to the user mobility. Therefore, for the interconnection of ATM based wireless and ATM networks, a mechanism will be required to maintain an end-to-end ATM connection with user mobility. Some schemes have been proposed in the literature including the use of multiple circuit numbers per mobile and assigning VPI/VCI to a base station. However, the ATM networks are likely to be operating at a speed much higher than the wireless networks and are therefore less likely to become a bottleneck under a high rate of handoffs. Thus the increased processing due to an interconnection scheme should be introduced in the ATM networks. This paper presents one such scheme, termed RAC, based on rearranging connections. The scheme has been analyzed to derive an expression for the overhead introduced and some preliminary results are presented.
Jan Madsen - One of the best experts on this subject based on the ideXlab platform.
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Julian Harris and Jan Madsen
2008Co-Authors: Julian Harris, Jan MadsenAbstract:This paper outlines the study of, and the methods used to perform a random walk simulation of the atm signalling connection management handled by the Q.2931 and SSCOP protocol layers. Outlined also is the way in which the same Synchronous C++ source code is used for both the implementation of the protocol layers and also for the protocol model which is explored by the random walker. Keywords: ATM, Signalling, Randomwalk, Synchronous C++, Language 1.0 ATM signalling ATM signalling is the subsystem within the ATM environment which establishes, manages and releases ATM connections. In ATM this signalling is performed out of band, which means that all signalling data is exchanged between peer systems on one dedicated ATM virtual circuit. This virtual circuit has the same virtual circuit identifier in any ATM system so does not need to be negotiated in this sense. However, the signalling channel still need to be initialised prior to any signalling information being exchanged over it. This ..
Julian Harris - One of the best experts on this subject based on the ideXlab platform.
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Julian Harris and Jan Madsen
2008Co-Authors: Julian Harris, Jan MadsenAbstract:This paper outlines the study of, and the methods used to perform a random walk simulation of the atm signalling connection management handled by the Q.2931 and SSCOP protocol layers. Outlined also is the way in which the same Synchronous C++ source code is used for both the implementation of the protocol layers and also for the protocol model which is explored by the random walker. Keywords: ATM, Signalling, Randomwalk, Synchronous C++, Language 1.0 ATM signalling ATM signalling is the subsystem within the ATM environment which establishes, manages and releases ATM connections. In ATM this signalling is performed out of band, which means that all signalling data is exchanged between peer systems on one dedicated ATM virtual circuit. This virtual circuit has the same virtual circuit identifier in any ATM system so does not need to be negotiated in this sense. However, the signalling channel still need to be initialised prior to any signalling information being exchanged over it. This ..
Chow Jeffrey - One of the best experts on this subject based on the ideXlab platform.
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A VLSI receiver architecture for high speed ATM computer networks
University of British Columbia, 1994Co-Authors: Chow JeffreyAbstract:Network communication bandwidths are surpassing the computational power of host systems. This improvement in communications bandwidth creates a need to develop ded icated communications processors which service the network without serious degradation of throughput. Asynchronous Transfer Mode(ATM) is a new Broadband Integrated Services Digital Network(BISDN) protocol specified to operate over fibre lines at rates of 155 Mbps or 622 Mbps. As the high-speed ATM networking protocol gains widespread acceptance in the networking community, dedicated high-speed protocol processing hardware is required to process ATM’s small 53 byte cells. In ATM networks, the problem of reassembly of cells at network speeds on the receiver side, is of particular significance. The Adaptation Layer is responsible for cell reassembly. In this thesis, a VLSI architecture for ATM receiver adap tation layer processing is presented. A fine grained parallel architecture is employed in our receiver design. Improvements over other ATM receiver designs have been made in our de sign. Potential bottlenecks in existing designs have been identified and an effort is made to overcome these problems. Problems such as parallel CRC computation, fast virtual circuit identifier (VCI) mapping, and effective memory architectures are resolved. The proposed design is shown to operate at high throughputs ranging from 264.46 Mbps to well over 622 Mbps for sustained network data. The design is modelled at two levels so that low level timing details can be determined and high level traffic behavior can be monitored.Applied Science, Faculty ofElectrical and Computer Engineering, Department ofGraduat
D.j. Goodman - One of the best experts on this subject based on the ideXlab platform.
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A wireless service for the IEEE 802.6 metropolitan area network
IEEE Global Telecommunications Conference GLOBECOM '91: Countdown to the New Millennium. Conference Record, 1991Co-Authors: K.s. Meier-hellstern, Gian Piero Pollini, D.j. GoodmanAbstract:The authors explore how to use specific features in the IEEE 802.6 standard to allow the metropolitan area network to function as a cellular packet switch. They compare the needs of wireless voice, data, and signaling with existing 802.6 capabilities and find that several new features are required. The proposed voice service allows voice packets from the radio link to be carried in a single 802.6 slot of 53 bytes. This is accomplished by eliminating portions of the 802.6 adaptation layer which are unneeded for voice. Signaling traffic is accommodated by use of the virtual circuit identifier and the message identification fields to provide virtual circuits, permanent virtual circuits, and point-to-multipoint virtual circuits. Low bit rate data can be supported using the existing 802.6 connection-oriented service with retransmission at the segmentation and reassembly sublayer.
