4.10 Requirements for contiguous and non-contiguous spectrum

38.176-23GPPIntegrated Access and Backhaul (IAB) conformance testingNRPart 2: radiated conformance testingRelease 17TS

A spectrum allocation where an IAB operates can either be contiguous or non-contiguous. Unless otherwise stated, the requirements in the present specification apply for IAB configured for both contiguous spectrum operation and non-contiguous spectrum operation.

For IAB operation in non-contiguous spectrum, some requirements apply both at the IAB-DU RF Bandwidth edges or IAB-MT RF bandwidth edges and inside the sub-block gaps. For each such requirement, it is stated how the limits apply relative to the IAB-DU RF Bandwidth edges or IAB-MT RF bandwidth edges and the sub-block edges respectively.

4.11 Requirements for IAB capable of multi-band operation

For multi-band RIB, the RF requirements in clause 6 and 7 apply separately to each supported operating band unless otherwise stated. For some requirements, it is explicitly stated that specific additions or exclusions to the requirement apply at multi-band RIB(s) as detailed in the requirement clause.

IAB type 1-O may be capable of supporting operation in multiple operating bands with one of the following implementations at the radiated interface boundary:

– All RIBs are single-band RIBs.

– All RIBs are multi-band RIBs.

– A combination of single-band RIBs and multi-band RIBs provides support of the IAB type 1-O capability of operation in multiple operating bands.

For multi-band RIBs supporting the bands for TDD, the RF requirements in the present specification assume no simultaneous uplink and downlink occur between the bands.