Question: In a Multi-Standard Radio (MSR) Base Station setup for TC22 generation, if an NB-IoT operation in NR in-band is supported, how are the carriers placed adjacent to the lower Base Station RF Bandwidth edge?
Option 1: A standalone NB-IoT carrier is placed first, followed by a 5MHz E-UTRA carrier, and then a 5MHz/15kHz SCS NR carrier with NB-IoT operation in NR in-band.
Option 2: A 10 MHz E-UTRA carrier is placed first, followed by the power boosted NB-IoT RB at the lower outermost eligible position, and no NR carrier is mentioned in this context.
Option 3: A 5MHz/15kHz SCS NR carrier with NB-IoT operation in NR in-band is placed first, with the power boosted NB-IoT RB at its lower edge, immediately followed by a 5MHz E-UTRA carrier.
Option 4: A 5MHz E-UTRA carrier is placed first, then a 5MHz/15kHz SCS NR carrier with NB-IoT operation in NR in-band, with the power boosted NB-IoT RB positioned according to the minimum guard band at the lower Base Station RF Bandwidth edge.
Explanation: According to the TC22 generation method for a Multi-Standard Radio (MSR) Base Station when NB-IoT operation in NR in-band is supported, the correct placement adjacent to the lower Base Station RF Bandwidth edge involves placing a 5MHz/15kHz SCS NR carrier with NB-IoT operation in NR in-band. The power boosted NB-IoT RB is positioned at the lower outermost eligible position for NB-IoT operation in NR in-band, closest to the NR minimum guard band at the lower Base Station RF Bandwidth edge. Immediately after this setup, a 5MHz E-UTRA carrier is placed adjacent to the NR carrier, making Option 3 the correct sequence and placement strategy.