Green Random Access for Wireless Peer Discovery

This letter investigates the joint design problem of transmission probability (v) and transmit power (p) in random access-based wireless peer discovery (RA-WPD) operations, in terms of reducing the power consumption of the peers. These v and p determine the number of transmitters and receivers in a half duplex operation and the link coverage; therefore, their effects should be managed through comprehensively considering the wireless network behaviors such as the spatial distribution of peers and wireless channels. This design problem is expressed as geometric programming (GP) and the numerical results demonstrate that the v and p design based on the GP solution contributes to reducing the power consumption.