Content for  TS 38.300  Word version:  18.3.0

A RedCap UE has reduced capabilities with the intention to have lower complexity with respect to non-RedCap UEs. It is mandatory for a RedCap UE to support 20 MHz maximum UE channel bandwidth in FR1 and 100 MHz in FR2. An eRedCap UE has further reduced capabilities with the intention to have lower complexity with respect to RedCap UEs. It is mandatory for an eRedCap UE to support reduced DL/UL peak data rate of 10 Mbps, with or without reduced baseband bandwidth of 5 MHz for unicast PDSCH/PUSCH in FR1.

CA, MR-DC, DAPS, CPA, CPC and IAB related capabilities are not supported by (e)RedCap UEs, as defined together with other limitations in TS 38.306. It is up to the network to prevent (e)RedCap UEs from using radio capabilities not intended for (e)RedCap UEs.

A RedCap UE can be identified by the network during Random Access procedure via MSG3/MSGA from a RedCap specific LCID(s) and optionally via MSG1/MSGA (PRACH occasion or PRACH preamble). An eRedCap UE can be identified by the network during Random Access procedure via MSG3/MSGA from an eRedCap specific LCID(s) and optionally via MSG1. For RedCap UE identification via MSG1/MSGA, RedCap specific Random Access configuration may be configured by the network. For eRedCap UE identification via MSG1, eRedCap specific Random Access configuration may be configured by the network. For MSG3/MSGA, an (e)RedCap UE is identified by the dedicated LCID(s) indicated for CCCH identification (CCCH or CCCH1) regardless whether (e)RedCap specific Random Access configuration is configured by the network. (e)RedCap UEs with 1 Rx branch and 2 Rx branches can be allowed separately via system information. In addition, (e)RedCap UEs in Half-Duplex FDD mode can be allowed via system information. A RedCap specific IFRI can be provided in SIB1, when absent, RedCap UEs access is not allowed. An eRedCap specific IFRI can be provided in SIB1, when absent, eRedCap UEs access is not allowed. Information on which frequencies (e)RedCap UE access is allowed can be provided in system information. An (e)RedCap UE with 1 Rx branch applies the associated offset for broadcasted cell specific RSRP thresholds for random access, SDT, cell edge condition and cell (re)selection criterion as specified in TS 38.133.

RRM measurement relaxation is enabled and disabled by the network. In RRC_IDLE and RRC_INACTIVE an (e)RedCap UE is allowed to relax neighbour cell RRM measurements when the stationary criterion is met or when both stationary criterion and not-at-cell-edge criterion are met. Network may configure stationary criterion for an (e)RedCap UE in RRC_CONNECTED and the UE reports its RRM measurement relaxation fulfilment status using UE Assistance Information when the stationarity criterion is met or no longer met.

An (e)RedCap UE in RRC_IDLE or RRC_INACTIVE monitors paging only in an initial BWP (default or RedCap specific) associated with CD-SSB and performs cell (re-)selection and related measurements on the CD-SSB. If a RedCap-specific initial UL BWP is configured and NUL is selected, (e)RedCap UEs shall use only the RedCap-specific initial UL BWP to perform RACH procedure in RRC_IDLE and RRC_INACTIVE or to perform CG-SDT procedure (as described in clause 18.0) in RRC_INACTIVE. An (e)RedCap UE may be configured with multiple NCD-SSBs provided that each BWP is configured with at most one SSB. NCD-SSB may be configured for an (e)RedCap UE in RRC_CONNECTED to perform RLM, BFD, and RRM measurements and RA resource selection when the active BWP does not contain CD-SSB. An (e)RedCap UE may be configured with NCD-SSB for a RedCap-specific initial DL BWP to perform SDT procedure in RRC_INACTIVE (as described in clause 18.0) in case the RedCap-specific initial DL BWP does not contain CD-SSB.