Computing , . If , UE associates with macrocell, or with picocell.

(3)āāEnergy Efficiency Computation

Firstly, calculate non-ABS and ABS utilization of downlink.

āāā(d)

,āāā(e)

Secondly, for each user, calculate the time scale of subframe for downlink

āāā(f)

āāā(g)

āāā(h)

Finally, the rate and power consumption of user can be computed.

For , .

For , .

So the EE of user: .

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