Table 1 List of notations
From: Interference-aware high-throughput channel allocation mechanism for CR-VANETs
Notation | Description |
|---|---|
B | Set of licensed channels in the network |
W b | Bandwidth of channel b |
| Set of OBUs registered with an RSU |
B i | Set of available licensed channels at OBU i |
B ij | B i ∩B j , set of common channels available at i and j |
T | Length of scheduling cycle |
N i | Set of neighbors of OBU i |
\(P_{i}^{tr}\) | Transmission power of an OBU i |
D ij | Number of data packets awaited in the queue of OBU i for transmission from OBU i to OBU j |
ψ ij | Required data rate for transmission |
δ ij | Tolerable maximum transmission delay |
Z b | PU idle time at channel b |
λ b | PU arrival rate at channel b |
\(q_{\textit {ij}}^{b}\) | Transmission quota of OBU pair {i,j} on channel b |
\(s_{\textit {ij}}^{b}\) | Success probability of OBU pair {i,j} on channel b |
\(R_{\textit {ij}}^{b}\) | Achievable data rate from OBU i to OBU j on channel b |
ζ | Medium access delay |
\(\text {SINR}_{\textit {ij}}^{b}\) | SINR value between OBU i and OBU j on channel b |
L i | Length of the packets at the transmission queue of OBU i |
\(\tau _{\textit {ij}}^{b}\) | Required tx time for OBU pair {i,j} on channel b |
ρ I | Weight of independent set I |
Θ | Set of all maximum independent sets |
| Set of all OBU pairs requesting transmission |
| Set of OBUs in the interference range of OBU i |
ω(G) | Set of all independent vertices in a conflict graph G |
