Effective bandwidths for multiclass Markov fluids and other ATM sources
IEEE/ACM Transactions on Networking (TON)
Proportional differentiated services: delay differentiation and packet scheduling
IEEE/ACM Transactions on Networking (TON)
Effective capacity: a wireless link model for support of quality of service
IEEE Transactions on Wireless Communications
QoS issues in the converged 3G wireless and wired networks
IEEE Communications Magazine
Effective bandwidth in high-speed digital networks
IEEE Journal on Selected Areas in Communications
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The rate constraint of transmitting multiple priority classes over a time-varying service-rate channel is studied in this work. This constraint specifies the maximum data rate that can be transmitted reliably with QoS (quality of service) guarantee. In our framework, the time-varying service channel is modeled by an N-state discrete Markov process, where each Markov state is associated with a channel service rate, and the absolute priority scheduling is used to transport packets of different classes. The transmission rate constraint is derived based on effective bandwidth and capacity. To be more specific, given channel parameters and the maximum buffer size for each priority class, statistical QoS guarantees in terms of packet loss probabilities can be determined and translated to the transmission rate constraint. The derived result is verified by simulation in a time-varying wireless environment.