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A traffic generation model is a stochastic model of the traffic flows or information sources in a interaction network, for example a cellular network or a computer network. A packet generation design is a traffic generation design of the package flows or data sources in a packet-switched network. For instance, a web traffic model is a design of the data that is sent out or received by a user’s web-browser.
The network performance can be analysed by network traffic measurement in a testbed network, using a network traffic generator such as iperf, bwping and Mausezahn. The traffic generator sends dummy packets, often with an unique package identifier, making it possible to monitor the packet shipment in the network.
An analytical technique using queueing theory may be possible for simplified traffic model, but is frequently too complex if a realistic traffic model is utilized. A simplified package data model is the greedy source model. It may be helpful in evaluating the maximum throughput for best-effort traffic (without any quality-of-service guarantees).
Another streamlined conventional traffic generation model for circuit-switched information in addition to package information, is the Poisson process, where the number of inbound packages or calls per time unit follows the Poisson circulation. The length of each phone call is usually modelled as an exponential circulation. The variety of at the same time ongoing call follows the Erlang distribution.
For a more practical model, a self-similar process such as the Pareto circulation can be used as a long-tail traffic design. The actual content of the payload data is usually not modelled, however changed by dummy packages. However, if the payload information is to be evaluated on the receiver side, for example regarding bit-error rate, a Bernoulli procedure is frequently assumed, i.e
. In this case a channel design reflects channel problems such as noise, disturbance and distortion. There are at least 2 standardized traffic generation models for packet-switched wireless networks: the 3GPP2 design and the 802.16 design. The 3GPP2 design is much more complicated to implement however it is expected to offer more accurate outcomes.