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A traffic generation design is a stochastic design of the traffic flows or information sources in a communication network, for instance a cellular network or a computer network. A package generation model is a traffic generation model of the packet streams or data sources in a packet-switched network. For example, a web traffic model is a design of the information that is sent or received by a user’s web-browser.
The network performance can be evaluated by network traffic measurement in a testbed network, utilizing a network traffic generator such as iperf, bwping and Mausezahn. The traffic generator sends dummy packages, frequently with a special package identifier, making it possible to keep an eye on the package shipment in the network.
An analytical technique utilizing queueing theory may be possible for simplified traffic design, but is frequently too complicated if a realistic traffic design is used. A simplified package data model is the greedy source model. It might be beneficial in evaluating the maximum throughput for best-effort traffic (without any quality-of-service warranties).
Another streamlined standard traffic generation design for circuit-switched data as well as packet data, is the Poisson procedure, where the number of inbound packages or calls per time system follows the Poisson distribution. The length of each telephone call is usually modelled as an exponential distribution. The number of simultaneously ongoing call follows the Erlang circulation.
For a more practical model, a self-similar procedure such as the Pareto distribution can be used as a long-tail traffic model. The real content of the payload data is generally not designed, but replaced by dummy packages. Nevertheless, if the payload information is to be evaluated on the receiver side, for instance concerning bit-error rate, a Bernoulli procedure is often assumed, i.e
. In this case a channel model reflects channel disabilities such as noise, disturbance and distortion. There are at least 2 standardized traffic generation models for packet-switched cordless networks: the 3GPP2 model and the 802.16 model. The 3GPP2 model is much more complex to implement however it is supposed to provide more accurate results.