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Digitale Medien

Dynamic capacity allocation and hybrid multiplexing techniques for ATM wireless LANs (1998)

Burrell, Anthony ; Stern, Harold P. ; Papantoni‐Kazakos, P.

Springer

Mobile networks and applications 3 (1998), S. 307-316

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ISSN: 1572-8153

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Notizen: Abstract We consider digital wireless multimedia LANs and time‐varying traffic rates. To deal effectively with the dynamics of the time‐varying traffic rates, a Traffic Monitoring Algorithm (TMA) is deployed to dynamically allocate channel capacities to the heterogeneous traffics. The TMA is implemented as a higher level protocol that dictates the capacity boundaries within two distinct framed transmission techniques: a Framed Time Domain‐Based (FTDB) technique and a Framed CDMA (FCDMA) technique. The performance of the TMA in the presence of the FTDB technique is compared to its performance in the presence of the FCDMA technique for some traffic scenarios. The performance metrics used for the TMA‐FTDB and TMA‐FCDMA combinations are channel capacity utilization factors, traffic rejection rates, and traffic delays. It is found that the TMA‐FTDB is superior to the TMA‐FCDMA when the speed of the transmission links is relatively low and the lengths of the transmitted messages are relatively short. As the speed of the transmission links and the length of the transmitted messages increase, the TMA‐FCDMA eventually outperforms the TMA‐FTDB.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1019141202797

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Digitale Medien

Traffic monitoring for capacity allocation of multimedia traffic in ATM broadband networks (1998)

Burrell, Anthony ; Makrakis, Dimitrios ; Papantoni-Kazakos, P.

Springer

Telecommunication systems 9 (1998), S. 173-206

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ISSN: 1572-9451

Quelle: Springer Online Journal Archives 1860-2000

Thema: Elektrotechnik, Elektronik, Nachrichtentechnik

Notizen: Abstract We address the accommodation of multimedia traffic by ATM broadband networks. We isolate a single network channel and we search for capacity allocation/transmission multiplexing policies which satisfy all traffic QOSs with simultaneous high utilization of channel capacity resources, in the presence of variable traffic rates. Towards that direction, we superimpose a high-level traffic-monitoring protocol which determines capacity allocations for each traffic category, dynamically. The latter protocol has sequential and implementation-efficient characteristics, and induces moving boundaries within prespecified and fixed channel frames. The channel frames are selected to satisfy the jittering constraints of all the traffics, such as voice, video and high versus low speed data. The high level protocol, in conjunction with the channel frame structure and the specifics of the transmission policy, may satisfy all traffic QOSs and may simultaneously attain high channel utilization, for certain variability conditions of the traffic rates and at relatively low implementation cost. Performance analysis as well as numerical evaluations are provided.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1019143822748

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