From: DQN-based resource allocation for NOMA-MEC-aided multi-source data stream
Notation | Definition |
---|---|
S | Number of sources |
\(D_s\) | The sth sources |
\(q_s\) | The bits of the sth source data stream |
\(c_s\) | The CPU cycles of the sth source data stream |
\(\beta _s\) | The percentage of source \(D_s\) data stream to be unloaded to the CAP |
\(|h_{s}|^2\) | Channel gain of wireless channel from the source \(D_s\) offloaded to the CAP |
\(P_s\) | Transmit power of source \(D_s\) |
B | Bandwidth of wireless channel from \(D_s\) to CAP |
\(t_s\) | Calculation delay of the sth source data stream unloading to the CAP |
\(T_1\) | The delay in the unloading phase |
\(E_1\) | System energy consumption in the unloading phase |
\(f_s\) | local computing capability on source \(D_s\) |
\(t_{\rm local}^s\) | Local calculation delay of the sth source |
\(T_2\) | Total local calculated time |
\(P_{\rm local}^s\) | Local calculated power of the sth source |
\(E_2\) | Total total local calculated energy consumption |
\(F_s\) | The computational power allocated to each source of the CAP |
\(t_{\rm MEC}^s\) | Computation delay at the CAP of source \(D_s\) |
\(T_3\) | Total calculation delay at the CAP |
\(P_{\rm MEC}^s\) | The calculated power of the CAP |
\(E_3\) | System energy consumption produced at the CAP |
\(T_{\rm total}\) | Total calculation delay of multi-source data streams |
\(E_{\rm total}\) | Total energy consumption |
\(P_{\max }^{s}\) | Maximum transmit power of the source |
\(\mu\) | A weight factor of system cost |
\(\alpha _s\) | Transmit power ratio of source \(D_s\) |
\(\Theta _{s}\) | System cost |