A Cell Zooming Strategy with Cooperative Transmission and Load Balancing in Hyper Cellular Network

Abstract

In order to fulfill the demand of high traffic and wide area coverage in dense 5G networks, this paper proposes a new scheme that joint adaptive load balancing and cooperative transmission technology in hyper cellular network (HCN) to improve the edge spectral efficiency and ensure coverage probability. The load status of the TBS is analyzed by control base station (CBS) to realize the rational use of resources. For the heavy-load TBS, CBS control traffic base station (TBS) to perform adaptive cell zooming to optimize user association and achieve load balancing. For the light-load TBS after cell zooming, it should be put into sleeping state to save energy consumption of TBS and reduce interference to active users. In addition, the adaptive clustering sheme is used to alleviate the degradation of user signal quality after cell extending. Then, the integral expression of the coverage probability and the edge spectral efficiency are derived by the stochastic geometric. Numerical simulation analysis is performed and the results show that the proposed scheme gives notable gains in edge spectral efficiency compared to the existing schemes.