CBR channels on a DQRAP-based HFC network

Chien-Ting Wu; Graham Campbell

doi:10.1117/12.227276

24 November 1995 CBR channels on a DQRAP-based HFC network

Chien-Ting Wu, Graham Campbell

Proceedings Volume 2609, Hybrid Fiber-Coax Systems; (1995) https://doi.org/10.1117/12.227276
Event: Photonics East '95, 1995, Philadelphia, PA, United States

Abstract

DQRAP (distributed queuing random access protocol), is a multiple access protocol that offers a throughput equal to the offered traffic up to a load of one with a lesser delay than any other multiple access protocol. DQRAP utilizes three control minislots and two distributed queues: transmission and collision resolution, to provide this performance for all values of 'a', i.e., the size of the network is immaterial. This paper describes: (a) how DQRAP can act as the switching fabric for a distributed ATM switch serving an HFC (hybrid fiber-coax) network; and (b) how CBR (constant bit rate) traffic is supported on our distributed ATM switch, i.e., a DQRAP/ATM switch. Simulation results representing the operation of a DQRAP/ATM switch operating in two modes: (a) the control minislots in dataslots allocated to CBR traffic are utilized in the reservation process; and (b) the control minislot capacity in those slots is allocated to CBR data.

Citation Download Citation

Chien-Ting Wu and Graham Campbell "CBR channels on a DQRAP-based HFC network", Proc. SPIE 2609, Hybrid Fiber-Coax Systems, (24 November 1995); https://doi.org/10.1117/12.227276

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