2.2 CR routing
This simulator provides simulation support for channel assignment and CR routing. The functionalities provided are listed as follow.
· Create CR multi-radio/single-radio multi-channel simulation environment
It includes the creation of radios with homogenous and heterogeneous radio parameters, as well as spectrum with homogenous and heterogeneous propagation property. Here, the radio parameter includes predefined transmission power on each radio.
· Interface for radio and channel decision
· Interference information
· Traffic information
· Channel Utilization information
Also, a routing implementation example is shown to use the interfaces provided by this simulator. User can replace this example with their CR routing algorithms.
The supported functionality for CR routing in this simulator is shown in the diagram as follow in the darker color. Starting from the top, this figure is explained according to the interfaces parameters provided to the user. Details…
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CR Routing includes channel decision, radio selection, and route selection decision.
- Channel decision includes channel number and transmission power on the selected channel.
- Radio selection means which radio to use.
- Route decision means which path for packet forwarding.
These decision need to be sent down to the lower layer through the multi-channel, multi-radio/single-radio support module provided by CRCN, which is included in the diagram with darker blue color.
·
STICR( Spectrum Utilization information,
Traffic information and Interference information from the Channel and Radio
selected by CR Routing)
The lower layer collects the information needed by CR Routing and sends the information to the upper layers. The information needed by CR Routing includes spectrum utilization information, traffic information, and interference information. The information is processed at the Traffic estimation/Spectrum utilization estimation/Interference estimation functional block provided by CRCN.
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