Table 1 Key parameters and descriptions
From: ECPM: an energy-efficient cloudlet placement method in mobile cloud environment
Item | Description |
|---|---|
AREA | The collection of the entire activity area AREA={(x,y)|0≤x≤W,0≤y≤H} |
DEVICE | A collection of mobile devices DEVICE={d1,d2,…,dN} |
Devicen | Represents the nth device in the mobile device collection |
Devicepositionn(t) | The location of the mobile device at time t. |
CLOUDLET | The collection of cloudlets CLOUDLET={cloudlet1,cloudlet2,…,cloudletM} |
AP | The collection of AP P={p1,p2,…,pM} |
Cloudletm | The mth mobile cloud |
Cloudpositionm(t) | The center location of mobile cloud at time t. |
Radiumm | The coverage radius of mobile cloud cloudletm |
Devicecollectionm(t) | The device collection at time t |
Thresh | The threshold to determine whether to place mobile cloud |
TotalN(t) | The total number of covered devices by all cloudlets |
Devicecollectionm,P(t′) | At time t, the device collection of cloudpositionm located at the position of P(x,y) |