From: Energy-efficient offloading decision-making for mobile edge computing in vehicular networks

Notation | Definition |
---|---|

N | Number of RSUs |

\(\mathcal {N}\) | Set of RSUs |

K_{n} | Number of vehicles connects to RSU n |

\(\mathcal {K}_{n}\) | Set of vehicles connects to RSU n |

\(H_{k_{n}}^{n}\) | Channel gain between k_{n} and RSU n |

B | Channel bandwidth |

N_{0} | Noise power spectral density |

S | Size of a data packet |

\(I_{k_{n}}\) | Interference power from other RSU to vehicle k_{n} |

\(p_{k_{n}}^{m}\) | Transmission power of k_{n} |

\(p_{k_{n}}^{l}\) | Local execution power of k_{n} |

\(R_{k_{n}}^{m}\) | Transmission rate of k_{n} |

\(C_{k_{n}}^{m}\) | Number of packets executed by the MEC server |

\(C_{k_{n}}^{l}\) | Number of packets executed by k_{n} |

\(N_{k_{n}}^{f}\) | Number of flexible subtasks of k_{n} |

\(N_{k_{n}}^{l}\) | Number of local subtasks of k_{n} |

\(\alpha _{k_{n}},\beta _{k_{n}}\) | Offloading decision |

F^{m} | Total computation resource of the MEC server |

\(F_{k_{n}}^{m}\) | Allocated computation resource to k_{n} by the MEC server |

\(F_{k_{n}}^{l}\) | Local computation resource |

\(L_{k_{n}}\) | Packet number of each subtask of k_{n} |

\(Z_{k_{n}}\) | Computation intensity of each subtask of k_{n} |

\(E_{k_{n}}^{m}\) | Transmission energy consumption of flexible subtask of k_{n} |

\(E_{k_{n}}^{l1}\) | Local energy consumption of flexible subtasks of k_{n} |

\(E_{k_{n}}^{l2}\) | Local energy consumption of local subtasks of k_{n} |

\(A_{k_{n}}^{m}\) | Number of arrival packets in the transmission queue of k_{n} |

\(A_{k_{n}}^{l}\) | Number of arrival packets in the local queue of k_{n} |

\(Q_{k_{n}}^{m}\) | Transmission queue of k_{n} |

\(Q_{k_{n}}^{l}\) | Local queue of k_{n} |

\(D_{k_{n}}^{m}\) | Number of drop packets in the transmission queue of k_{n} |

\(D_{k_{n}}^{l}\) | Number of drop packets in the local queue of k_{n} |

\(Q_{k_{n}}^{m}\) | Packet drop penalty in the transmission queue of k_{n} |

\(Q_{k_{n}}^{l}\) | Packet drop penalty in the local queue of vehicle k_{n} |