 a time-multiplexed way. UEs that do not support DPS have to support tdm-Pattern for single UL-transmission capability, which is also known as SUO. In the case where the UE supports DPS, the 5G modem is aware of the LTE transmis- sion power and allocation properties, and it can ensure that the UE's maximum output power capability, that is, Pcmax, is not exceeded. The LTE modem is not required to be aware of the 5G transmission power or allocation properties, and thus it will set its out- put power regardless of the 5G transmission. If P_LTE P_NR exceeds Pcmax, then the 5G modem scales the 5G transmission power down to satisfy P_LTE + NR = Pcmax. If the amount of necessary scaling is more the network signaled value xScale, then the UE is allowed to drop the 5G transmission, that is, not to transmit the 5G uplink at all for that subframe. 12.5.4 Dual Uplink Challenges for EN-DC Operation in FR1 The root cause of challenges for DPS-capable EN-DC UE operation resides in the basic assumption that for non-standalone (NSA) initial deployments, there is no scheduler 2 bands LTE-CA. 1 uplink Release 16.0: 3 bands EN-DC (NSA) Release 15.4.0 667 distinct band combinations 432 distinct band combinations. 3 bands 2 bands combos 4 bands 4 bands (FR1) combos Intra-band combos Intra-band combos 71 FR1 combos contiguous (FR2) Contiguous 2 combos 15 combos (FR1) combos 24 FR2 5 bands 5 bands 42 combos Contiguous (FR1/FR2) (27FR1,8FR2 contiguous (FR2) bands 19 combos FR1/FR2 7 FR1 &FR2) 2 combos combinations # LTE bands Figure 12.17 Number of unique combinations: (left) LTE-CA, (right) 5G EN-DC. 12.5 Dual Uplink Performance Challenges for NSA Operation coordination between the eNb and the gNb, thereby making the UE responsible for deciding when and how to perform power sharing between LTE and 5G. In addition to this, for the special case of intra-band EN-DC operation, the UE must also be operated in conditions which can lead to huge receiver self-desensitization for FDD bands, a much larger MSD than that witnessed in LTE-CA. In the