Uplink Resource-Allocation in VWN with Massive-MIMO and Dynamic Pilot-Duration

In this chapter, we address the resource allocation problem in a VWN with massive MIMO at the BS. Specifically, we focus on the imperfect CSI estimation scenario in a massive MIMO VWN and formulate the resource allocation problem that jointly assigns sub-carrier, power, antenna and adaptive pilot duration to users with the aim of maximizing the total sum-rate of the system. An iterative algorithm is proposed that tries to dynamically assign these resources to users while maintaining the isolation constraints among slices. The proposed iterative algorithm is compared with the scenario where users have a fixed pilot duration to report their CSI information to the BS. The numerical results demonstrate that there is a significant improvement in the spectral efficiency of the VWN when using adaptive pilot duration compared to the situation with a fixed pilot duration.