5.3 The number of active BSs
The flow activity leads to the activities of BS in active, idle or sleep. The number of active
BS in our case is illustrated in the Fig. 6. The results show that the number of profiles of active
BSs is proportional to the volume of traffic. For the real traffic profile in Case I, and the ideal
traffic profiles in Case III and IV, the number of active BSs with the proposed algorithm is less
than the MBSS with direct power on/off in Case II .