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We formulate the problem of network-coding (NC)-based scheduling for media transmission to multiple users over a wireless-local-area-network-like or WiMAX-like network as a Markov decision process (MDP). NC is used to minimize the packet losses that resulted from unreliable wireless channel conditions, whereas the MDP is employed to find the optimal policy for transmissions of unequally important...
We present a dynamic spatial backoff method to resolve channel contention in wireless ad-hoc networks. We argue that each node should adjust its receiver sensitivity level according to the mean channel gain of its particular transmitter-receiver link, in order to see the full benefit of spatial backoff and improve the throughput. We designed a distributed algorithm that adjusts each transmitters carrier...
We consider data-streaming from an access point to multiple receivers, which is modeled as packet erasure channel. A simple network coding is shown to achieve larger rate region than without network coding, using minimal control information. The performance is characterized exactly using state transition graph. The scheme is then mapped to an information theoretic formulation for broadcast channel...
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