Abstract :
Advanced networking technologies have enabled the integration of multimedia transmissions, such as video, voice and data, in packet-switched networks. At the network level, it has been shown that stringent quality of service (QoS) guarantees are required for multimedia traffic flows through appropriate rate controls. The authors propose a novel rate control model to regulate the generating rate of each media traffic source by scaling the QoS parameters, including video quantisation parameter, voice packet-dropping rate and delayed data transmission. They also study the mapping function between the rate regulation and the rate scheduling corresponding to the QoS parameters so that not only QoS but rate smoothing can be guaranteed for multimedia transmissions. The race condition caused by single-level feedback control is also mitigated by applying multilevel queueing. The performance of the rate control model is analysed by employing the M/D/1/K queueing model, and the effectiveness is demonstrated by numerical results
Keywords :
data communication <rate control, scaling QoS params. for multimedia transms., perform. anal.>; feedback <rate control, scaling QoS params. for multimedia transms., perform. anal.>; multimedia communication <rate control, scaling QoS params. for multimedia transms., perform. anal.>; quality of service <rate control, scaling QoS params. for multimedia transms., perform. anal.>; queueing theory <rate control, scaling QoS params. for multimedia transms., perform. anal.>; telecommunication congestion control <rate control, scaling QoS params. for multimedia transms., perform. anal.>; telecommunication traffic <rate control, scaling QoS params. for multimedia transms., perform. anal.>; visual communication <rate control, scaling QoS params. for multimedia transms., perform. anal.>; voice communication <rate control, scaling QoS params. for multimedia transms., perform. anal.>; M/D/1/K queueing model; QoS guarantees; QoS parameters scaling; data transmission; delayed data transmission; mapping function; multilevel queueing; multimedia traffic flows; multimedia transmissions; packet-switched networks; performance analysis; quality of service guarantees; race condition; rate control model; rate regulation; rate scheduling; rate smoothing; single-level feedback control; traffic source; video quantisation parameter; video transmission; voice packet-dropping rate; voice transmission;
