
Hybrid Topology Exploration for RF-Based On-Chip Networks 221
TABLE 6.5
Energy and delay of bus and interrouter links
Parameters Bus
70 nm 50 nm 35 nm 25 nm 18 nm
Length (mm) 7 4.9 3.43 2.4 1.68
Delay (ps) 498.9 442.9 353.9 247.7 173.4
Energy (pJ) 1.4 0.67 0.28 0.20 0.14
Leakage (nW) 23.5 13.3 3.5 2.4 1.7
Link
70 nm 50 nm 35 nm 25 nm 18 nm
Length (mm) 3.5 2.45 1.7 1.2 0.84
Delay (ps) 233 208.8 167.5 117.3 82.1
Energy (pJ) 0.6 0.29 0.12 0.08 0.06
Leakage (nW) 10.2 5.49 1.4 0.98 0.69
6.7 Results
We will first study the mesh topology enhanced with RF alone for various net-
work parameters. Followed by this, we will understand the effect of overlaying
RF-I on CMESH ...