Exploiting multiple access points diversity gain in the multi-access wireless network

In this paper, we discuss how to exploit the multiple access points diversity gain in the downlink transmission of a multi-access wireless network. To follow the current user equipment hardware constraint as well as to reduce the network control overhead, we confine that each user equipment can only be serviced by one best suited access point. To achieve this, we formulate such problem as a non-linear integer program, which typically is computational intractable. To derive its solution, we first convert it to a linear integer program, which is then used to obtain a fractional solution, and further we refine the fractional solution to be integer to satisfy integer constraints for the access point selection and the resource unit allocation. By doing so, our algorithm has a low computational complexity. We also show the performance improvement of our algorithm over the distance based AP selection and the random AP selection methods through simulation.