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A WANET refers to a wireless network where the wireless nodes of the network can be placed in any part of the world. In the case of a WANET, the underlying design is such that the nodes feel like they are part of a single-hop or multi-hop wireless network. This design works at the PHY and MAC layers. Such a design of this extensive wireless network is possible with the use of Software Defined Access Points (SoDA). SoDAs are based on the idea of Software Defined Radio (SDR). In the case of uplink, each SoDA samples the down-converted channel with the use of an Analogto-Digital Converter (ADC). Data that is sampled by the access points is then multicast to the other SoDAs via the internet. For each end point in the WANET, digital signals that are received from the other SoDAs are put together and sent through the Digital-to-Analog Converter (DAC). They are then transmitted on a designated channel after upconversion. Under this entire process, users have been able to mix the RF environment at geographically distant locations. Therefore, this simple technique is able to come up with a whole new model that can be used to design and use wireless networks. The networks therefore follow the end-to-end model where only the end nodes can decipher PHY/MAC layers. In such a case, access points and the internet only function as dumb relays.
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