Advances, Systems and Applications
From: Mobility-aware hierarchical fog computing framework for Industrial Internet of Things (IIoT)
Sr. | Symbol | Definition |
---|---|---|
1 | U | List of user IIoT devices |
2 | V | List of volunteer IIoT devices |
3 | \(n_u\) | No. of devices in List U |
4 | \(n_v\) | No. of devices in List V |
5 | \({V_c}^i\) | Computation capacity of ith volunteer device |
6 | \(\Upsilon _{\text {L}}\) | Local execution rate on mobile device |
7 | \(\upsilon _{k}\) | Execution required by task \(\sigma _k\) |
8 | \(\sigma _{s}^i\) | The workload received at \(s_{th}\) server in level-i. |
9 | \(\sigma _{k}^{\text {L}}\) | The workload executed locally |
10 | \(\sigma _{k}^{\text {F}}\) | The workload executed in Fog |
11 | \(\sigma _{k}^{\text {C}}\) | The workload executed in Cloud |
12 | \({\zeta _s}^1\) | The capacity of \(s_{th}\) server in level-i. |
13 | \({Off}_i\) | The offloaded workload |
14 | \(\delta\) | The execution delay |
15 | \(\digamma _n\) | Dedicated Fog Nodes |
16 | \(W_n\) | Gateway Nodes |
17 | \(U_n\) | User nodes seeking computation |
18 | \(V_n\) | User nodes volunteer resources |
19 | \(\mathcal {D}_i^\digamma\) | Computation delay (queue + service) |