Section: 10.2.6A.3 NPRS subframe configuration
Content: On a NB-IoT DL carrier configured for NPRS transmission, an NB-IoT UE can assume NPRSs are transmitted in DL subframes configured by all higher layer parameters nprsBitmap, the NB-IoT carrier-specific subframe configuration period the NB-IoT-carrier-specific starting subframe offset and the number of consecutive downlink subframes where NPRS shall be transmitted. If frame structure type 2 is used, the UE shall not assume NPRSs are transmitted in special subframes. - If , and are not configured for an NB-IoT downlink carrier configured for NPRS transmission, an NB-IoT UE shall assume NPRSs are transmitted in downlink subframes configured by higher layer parameter nprsBitmap. - If nprsBitmap is not configured for an NB-IoT downlink carrier configured for NPRS transmission, an NB-IoT UE shall assume NPRSs are transmitted in downlink subframes configured by the higher layer parameters , and . - If the higher layer parameter operationModeInfoNPRS for the configured NB-IoT carrier is set to in-band, the higher layer parameters nprsBitmap shall be configured. - If , and are configured, the NPRS instances in the first subframe of the downlink subframes, shall satisfy . The NPRSs shall not be mapped to resource elements allocated to resource blocks of NPBCH, NPSS, NSSS, or SystemInformationBlock-Type1-NB regardless of their antenna port .