For example -
Case A - It consumes less signalling load:
Cell X - Band1 - PCI 22 Cell X - Band2 - PCI 22
Case B - It consume more signalling load:
Cell X - Band1 - PCI 22 Cell X - Band2 - PCI 222
Let say, if cell X had PCI value 22 for 1900Mhz band and cell Y had same PCI(22) for 2500Mhz band. Both these cells are first tier neighbors?
How Circuit Switch Fallback works?