Effective load for flow-level performance modelling of file transfers in wireless LANs

Traffic splitting policies in parallel queues with concurrent access: A comparison

“…Based on the effective service time, the effective load is defined to describe the performance of data flows in a network with an M/G/1 PS model. Extensive validation by means of simulations and experiments conducted with network equipment reveals that accurate predictions for the mean download time [19] and its distribution [20] can be obtained for a wide range of parameter combinations. Additionally, this model can be used to parameterize a PS-based queueing network, such that the outcomes correspond to the performance of real networks or vice versa.…”

“…need to be parameterized into the parameters of the PS-models (e.g., service times). To this end, in [19] we propose the concept of effective service time and give a full parameterization, translating the TCP-parameters into PS-model parameters. In doing so, the transfer time of a file over a TCP network is modeled by the sojourn time of a job in the corresponding PS-model In the special case where the service-time distributions are all exponentially distributed, with rates µ i := 1/β i (i = 0, 1, .…”

“…In [19], [20] a new concept is introduced for modeling data traffic flows in a communication network by jobs that are processed by a Processor Sharing (PS) queue. The influence of complex combined dynamics and protocol overhead of multiple communication layers on data traffic flows in real networks can be accounted for in an explicit expression for a single parameter which will be called the effective service time.…”

“…Processor Sharing (PS) models have been successfully applied to model TCP-based file transfers over a wide range of different network standards that are commonly used, from cellular [16], [17] to WLANs [18], [19], [20]. The complex dynamics of multiple protocol layers can be modelled to obtain very accurate download response time predictions over a single network [19]. Despite the applicability of PS-based models to real communication networks, little is known on PS-based models suitable for modeling the use of multiple networks concurrently.…”

Efficient traffic splitting in parallel TCP-based wireless networks: Modelling and experimental evaluation

“…Processor Sharing (PS) models have been successfully applied to model TCP-based file transfers over a wide range of different network standards that are commonly used, from cellular [14], [15] to WLANs [16], [17]. The complex dynamics of multiple protocol layers can be modelled to obtain very accurate download response time predictions over a single network [17]. Despite the applicability of PS-based models to real communication networks, there is little known on PS-based models suitable for modelling the use of multiple networks concurrently.…”