  In this letter, we consider the control of an energy self-sufficient receiver
in a multi-access network with simultaneous wireless information and energy
transfer. Multiple transmitters send data to a common receiver whose only
source of energy is a finite size battery which is recharged only from the
energy harvested from incoming RF signals. The nodes access the channel
randomly resulting in a packet collision when multiple transmitters
simultaneously access the channel. The receiver takes samples from the received
RF signal to calculate the probability of a collision. The objective is to
maximize the receiver goodput subject to the instantaneous availability of
receiver energy. We develop an asymptotically optimal dynamic control
algorithm, where the receiver makes an energy harvesting or decoding decision
according to the current channel measurements and battery level.
