Fig. 7From: A dynamic handover scheme based on bidirectional VLC channel in multi-user attocell networksHandover rate Rho versus the rate of closest attocell changing. Figure illustrates the relationship of handover rate with the rate of closest attocell changing. Yellow, red, green and blue lines represent the manifestation of the immediate handover, the dwell handover, the handover skipping and we proposed handover schemeBack to article page