Content for  TR 38.844  Word version:  18.0.0

The possibility of configuring a UE with a channel that is not fully contained within the operating band supported by the UE was investigated in the context of using some spectrum allocation in n12 and n85 (See Annex A, the case of n12 and n85). RAN1 and RAN2 specifications are written agnostic to the operating bands and channel placements, hence, the current signaling supports configuring a channel that is not fully contained within the operating band. However, RAN1 and RAN2 clarified during the study that such a configuration was never discussed or analyzed, hence, the UE behavior under such a configuration is unknown. Current RAN4 requirements are defined under the assumption that the BS and UE channel bandwidths are fully contained within one of the operating bands defined in the specifications. For example, Table 5.4.2.3-1 which defines the channel raster for each band contains NOTE 1 which states that "The channel numbers that designate carrier frequencies so close to the operating band edges that the carrier extends beyond the operating band edge shall not be used." In order to support such a configuration, at least a new UE capability would be needed. Also, in order to ensure that the UEs still meet the necessary requirements (including regulatory) the network would have to limit the RBs used by the UE to those that are confined within the operating band supported by the UE(see also clause 6.1.2.3). The note pointed out in the paragraph above would also have to be updated and any impact to legacy UEs should be avoided.