From: Energy-efficient offloading decision-making for mobile edge computing in vehicular networks
Notation | Definition |
---|---|
N | Number of RSUs |
\(\mathcal {N}\) | Set of RSUs |
Kn | Number of vehicles connects to RSU n |
\(\mathcal {K}_{n}\) | Set of vehicles connects to RSU n |
\(H_{k_{n}}^{n}\) | Channel gain between kn and RSU n |
B | Channel bandwidth |
N0 | Noise power spectral density |
S | Size of a data packet |
\(I_{k_{n}}\) | Interference power from other RSU to vehicle kn |
\(p_{k_{n}}^{m}\) | Transmission power of kn |
\(p_{k_{n}}^{l}\) | Local execution power of kn |
\(R_{k_{n}}^{m}\) | Transmission rate of kn |
\(C_{k_{n}}^{m}\) | Number of packets executed by the MEC server |
\(C_{k_{n}}^{l}\) | Number of packets executed by kn |
\(N_{k_{n}}^{f}\) | Number of flexible subtasks of kn |
\(N_{k_{n}}^{l}\) | Number of local subtasks of kn |
\(\alpha _{k_{n}},\beta _{k_{n}}\) | Offloading decision |
Fm | Total computation resource of the MEC server |
\(F_{k_{n}}^{m}\) | Allocated computation resource to kn by the MEC server |
\(F_{k_{n}}^{l}\) | Local computation resource |
\(L_{k_{n}}\) | Packet number of each subtask of kn |
\(Z_{k_{n}}\) | Computation intensity of each subtask of kn |
\(E_{k_{n}}^{m}\) | Transmission energy consumption of flexible subtask of kn |
\(E_{k_{n}}^{l1}\) | Local energy consumption of flexible subtasks of kn |
\(E_{k_{n}}^{l2}\) | Local energy consumption of local subtasks of kn |
\(A_{k_{n}}^{m}\) | Number of arrival packets in the transmission queue of kn |
\(A_{k_{n}}^{l}\) | Number of arrival packets in the local queue of kn |
\(Q_{k_{n}}^{m}\) | Transmission queue of kn |
\(Q_{k_{n}}^{l}\) | Local queue of kn |
\(D_{k_{n}}^{m}\) | Number of drop packets in the transmission queue of kn |
\(D_{k_{n}}^{l}\) | Number of drop packets in the local queue of kn |
\(Q_{k_{n}}^{m}\) | Packet drop penalty in the transmission queue of kn |
\(Q_{k_{n}}^{l}\) | Packet drop penalty in the local queue of vehicle kn |