Table 2 Summary of notations.
Notation | Description | Notation | Description |
|---|---|---|---|
N | Physical node set | n | Physical node |
E | Physical link set | e | Physical link |
Ns | Server nodes set | ns | Server node |
Na | Satellite platform nodes set | na | Satellite platform node |
Nc | Wireless access point or switch nodes set | nc | Wireless access point or switch node |
Nf | Flight nodes set | nf | Flight node |
Np | Service provider nodes set | np | Service provider node |
k(ns) | Remaining available resources of ns | k(na) | Remaining available resources of na |
d(ns) | Delay of ns | d(na) | Delay of na |
s(ns) | Security of ns | s(na) | Security of na |
b(e) | Remaining available bandwidth of e | d(e) | Delay of e |
f | SFC | T | Lifetime of f |
I | Source endpoint of f | O | Destination endpoint of f |
Dmax | Delay upper limit of f | Smin | Security lower limit of f |
V | VNFs set of f | vi | i-th VNF of V |
L | Virtual links set of f | li | i-th virtual link of L |
k(vi) | Resources requirements of vi. | b(li) | Bandwidth requirement of li |
s(vi) | Security of vi | η(vi) | Bandwidth variation factor of vi |
