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Bandwidth allocation and selective discarding for variable bit rate video and bursty data calls in ATM networks
Author(s) -
Decina Maurizio,
Toniatti Tiziana
Publication year - 1992
Publication title -
international journal of digital and analog communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1047-9627
DOI - 10.1002/dac.4510050204
Subject(s) - computer science , computer network , dynamic bandwidth allocation , bandwidth (computing) , bandwidth allocation , leaky bucket , variable bitrate , asynchronous transfer mode , homogeneous , channel allocation schemes , quality of service , real time computing , telecommunications , physics , wireless , thermodynamics
Congestion control mechanisms are required in ATM networks to fairly and efficiently allocate network resources to the various service types. Bandwidth allocation is a preventive control mechanism. On the basis of the traffic description given by the source, of the traffic load along the connection route and of the cell performance requirements, this mechanism gives a criterion to accept or reject a virtual connection request. A bandwidth called ‘equivalent bandwidth’ is allocated in order to ensure the cell transport objectives. This paper proposes a definition of equivalent bandwidth for stream, bursty data and variable bit rate video (VBRV) sources. The equivalent bandwidth values are evaluated by simulation considering both homogeneous and heterogeneous sources. In the heterogeneous mixes with different cell loss probability requirements the selective discarding mechanism permits a more efficient utilization of the network resources.