For the purposes of the present document, the terms given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.

For the purposes of the present document, the following symbols apply: ΔRIB,c ΔTIB,c

For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905. BS BCS CA CC DC DL E-UTRA FDD MPR MSD NR REFSENS SCS TDD UE UL

NR CA band combinations with SUL band were introduced from Rel-16. In Rel-16, intra-band CA with SUL band combination was supported, and the CA configuration was extended to inter-band CA with SUL band combination in Rel-17. With fast deployment of 5G in China, more spectrum currently utilized by GSM, UMTS and LTE will be evolved into NR deployment recently. As an example, 1.9GHz and 2GHz TDD bands are previously used by 4G and 3G, which are specified as NR TDD bands n39 and n34 in Rel-15 and also specified as SUL bands n98 and n95 in Rel-16 and Rel-17 respectively. The spectrum for these two bands themselves are not very large, thus single SUL band may not fully comply with the fast increased UL usage demanded by the operator. Therefore, NR CA configurations with two SUL band combinations, i.e. two SUL bands in two cells together with other TDD NR band(s), are emerging as a prospective solution for operators. Similarly, 700MHz, 850MHz, 900MHz, 1.8GHz and 2.1GHz bands defined as SUL bands n83, n89, n81, n80 and n84 in which 2 SUL bands in conjunction with NR TDD bands, e.g. n78, n79 are highly interested by operators holding the spectrum to boost the wide band UL performance. It is known that SUL band combination includes one SUL band and one NR band in a single cell. Aggregating a SUL band combination with another NR band and follow CA framework to specify the band combination specific requirements was already supported in previous SUL basket WI. However, the current SUL basket WI only considers one SUL band. To address the specific spectrum demand by operators, it is preferred to have a dedicated spectrum WI for NR CA combinations with two SUL cells that follow CA framework specified by both RAN1 and RAN4 specifications. In addition, since both SUL bands and NR TDD bands could support different power classes, the requirements for NR CA with two SUL cells should cover at least PC3 and PC2 cases in Rel-18.

The objectives of the core part are as follows:

• Specify the PC3 band-combination specific RF requirements for the listed CA configurations with two SUL cells including at least
  • Applicable frequencies if necessary
  • Applicable bandwidths and bandwidth sets if necessary
• Analyse combinations that have self-desensitization due to following reasons:
  • TX Harmonic and/or intermodulation overlap of receive band
  • TX signal overlap of receiver harmonic frequency
  • TX frequency being in close proximity of one of the receive bands
  • Any other identified reasons such that insufficient cross band isolation, harmonic mixing
• For the combination where self-desensitization exists, specify at least needed
  • ΔTIB, c and ΔRIB, c
  • Reference sensitivity exceptions including MSD test cases
  • Exceptions to the out-of-band blocking requirement

A single company is responsible for introducing all approved TPs in the current TR, i.e. TR editor. However, it is the responsibility of the contact person of each band/band combination to ensure that the TPs related to the band/band combination have been implemented.