E-UTRA (Evolved Universal Terrestrial Radio Access) - NR Dual Connectivity (EN-DC) of LTE 1 Down Link (DL) / 1 Up Link (UL) and 1 NR band
The present document is a technical report for Dual connectivity (DC) band combinations of LTE 1DL/1UL + one NR band under Rel-15 time frame. The purpose is to gather the relevant background information and studies in order to address Dual connectivity (DC) band combinations of LTE 1DL/1UL + one NR band for the Rel-15 band combinations in Table 1-1.
Table 1-1: Release 15 DC band combination of LTE 1DL/1UL + one NR band
DC combination
REL independent from
Single UL allowed (NOTE 1)
DC_1A-n77A
Rel-15
Yes
DC_1A-n78A
Rel-15
No
DC_1A-n79A
Rel-15
No
DC_3A-n77A
Rel-15
Yes
DC_3A-n78A
Rel-15
Yes
DC_3A-n79A
Rel-15
No
DC_11A-n77A
Rel-15
No
DC_11A-n78A
Rel-15
No
DC_11A-n79A
Rel-15
No
DC_11A-n257A
Rel-15
No
DC_18A-n77A
Rel-15
No
DC_18A-n78A
Rel-15
No
DC_18A-n79A
Rel-15
No
DC_18A-n257A
Rel-15
No
DC_19A-n77A
Rel-15
No
DC_19A-n78A
Rel-15
No
DC_19A-n79A
Rel-15
No
DC_21A-n77A
Rel-15
No
DC_21A-n78A
Rel-15
No
DC_21A-n79A
Rel-15
No
DC_26A-n77A
Rel-15
No
DC_26A-n78A
Rel-15
No
DC_26A-n79A
Rel-15
No
DC_26A-n257A
Rel-15
No
DC_28A-n77A
Rel-15
No
DC_28A-n78A
Rel-15
No
DC_28A-n79A
Rel-15
No
DC_41A-n257A
Rel-15
No
DC_42A-n77A
Rel-15
No
DC_42A-n78A
Rel-15
No
DC_42A-n79A
Rel-15
No
DC_20A-n28A
Rel-15
No
DC_39A-n78A
Rel-15
No
DC_39A-n258A
Rel-15
No
DC_1A_n257
Rel-15
No
DC_3A_n257
Rel-15
No
DC_3A-n258A
Rel-15
No
DC_5A-n257A
Rel-15
No
DC_7A-n78
Rel-15
No
DC_7A-n258A
Rel-15
No
DC_8A-n78A
Rel-15
No
DC_8A-n79A
Rel-15
No
DC_8A-n258A
Rel-15
No
DC_19A-n257
Rel-15
No
DC_20A-n78A
Rel-15
No
DC_21A-n257
Rel-15
No
DC_28A-n257
Rel-15
No
DC_28A-n258A
Rel-15
No
DC_38A-n78A
Rel-15
No
DC_39A-n79A
Rel-15
No
DC_41A-n77A
Rel-15
No
DC_41A-n78A
Rel-15
No
DC_41A-n79A
Rel-15
No
DC_41A-n258A
Rel-15
No
DC_42A-n257
Rel-15
No
DC_1A-n28
Rel-15
No
DC_3A-n7
Rel-15
No
DC_3A-n28
Rel-15
No
DC_5A-n78A
Rel-15
No
DC_7A_n28
Rel-15
No
DC_7A-n257A
Rel-15
No
DC_66A-n257A
Rel-15
No
DC_8A_n77A
Rel-15
No
DC_8A_n257A
Rel-15
No
DC_25A_n41A
Rel-15
No
DC_26A_n41A
Rel-15
No
DC_41A_n41A
Rel-15
No
DC_66A_n71A
Rel-15
No
DC_(n)71B
Rel-15
No
DC_20A_n8A
Rel-15
No
DC_46A_n78A
Rel-15
No
DC_1A_n50A
Rel-15
No
DC_1A_n51A
Rel-15
No
DC_2A_n71A
Rel-15
No
DC_3A_n50A
Rel-15
No
DC_3A_n51A
Rel-15
No
DC_7A_n50A
Rel-15
No
DC_7A_n51A
Rel-15
No
DC_20A_n50A
Rel-15
No
DC_20A_n51A
Rel-15
No
DC_28A_n50A
Rel-15
Yes
DC_28A_n51A
Rel-15
No
DC_42A_n50A
Rel-15
No
DC_42A_n51A
Rel-15
No
DC_66A_n260
Rel-15
No
DC_2A_n257A
Rel-15
No
DC_13A_n257A
Rel-15
No
DC_48A_n257A
Rel-15
No
DC_5A_n260
Rel-15
No
DC_13A_n260A
Rel-15
No
DC_48A_n260A
Rel-15
No
DC_(n)41AA
Rel-15
No
DC_5A_n261
Rel-15
No
DC_66A_n261
Rel-15
No
DC_1A_n40A
Rel-15
No
DC_2A_n66A
Rel-15
No
DC_2A_n78A
Rel-15
No
DC_2A_n260A
Rel-15
No
DC_3A_n3A(NOTE 2)
Rel-15
Yes
DC_3A_n40A
Rel-15
No
DC_5A_n40A
Rel-15
No
DC_5A_n66A
Rel-15
No
DC_8A_n40A
Rel-15
No
DC_12A_n260A
Rel-15
No
DC_12A_n5A
Rel-15
No
DC_20A_n77A
Rel-15
No
DC_20A_n258A
Rel-15
No
DC_30A_n66A
Rel-15
No
DC_30A_n260A
Rel-15
No
DC_40A_n77A
Rel-15
No
DC_66A_n5A
Rel-15
No
DC_66A_n78A
Rel-15
No
NOTE 1:	Details on how to support it can be found in Section 5.2.
NOTE 2:	only single tx switched UL mode is supported in Rel.15.
This TR contains a general part and band specific combination part. The actual requirements are added to the corresponding technical specifications.