hi all.
According to the GSM standard 05.02, “for broadcast and common control channels, the TSC must be equal to the BCC.”
In some configurations, to use TSC different from BCC on TCH and SDCCH channels situated in TS0 would allow to avoid random access interference. For example, a random access sent on TCH on TS0 (for handover) could be detected as valid on the RACH. Apparently, this could happen when frequency channels in use in the TS0 in non-BCCH TRX are quite close to BCCH frequency channel (400 kHz or 600 kHz spacing).
This feature removes the TRX specific constraint: TSC = BCC. Exception for this limitation is BCCH and PBCCH TRXs and also Base Band hopping cell (or Base band hopping layer in IUO case).
This would lead to following network quality improvements:
less ghost CHANNEL REQUEST on RACH => better SDCCH efficiency
less misbehavior on TS 0 during handovers.
my general question:
can we use TSC different from BCC on TCH and SDCCH channels situated in TS0 for all cells?