Author(s)

Wang Ren, Wang Yi, Tian Liangliang, Liu Yan

Corresponding Author

Wang Yi

ABSTRACT

In order to improve coverage and load balancing in cellular networks, CRE (Cell Range Expansion) which is introduced in LTE-Advanced has drawn significant attentions. However, the ping-pong effect resulting from cell handover is still a challenge. In this paper, we propose a new dynamic smooth handover method based on transition zones for the cell-edge users to deal with the ping-pong effect. The cells’ boundaries extend to transition zones within which the users do not switch serving cells. On the other hand, the range of the transition zones can be adjusted depending on performance requirements. Simulation results show that our proposed method is near optimum throughput and traffic load performance without the ping-pong effect.

KEYWORDS

CRE, Transition zone, Ping-Pong effect