Dynamic DCI Repetition Field Length for NB-IoT Coverage and Power

The patent dynamically adjusts the repetition number indicator field length based on the MCS value. When MCS is high (better channel conditions), the repetition number field is shorter, reducing power consumption. When MCS is low (poorer channel conditions), the repetition number field is longer, improving coverage capability. This dynamic adaptation resolves the contradiction between coverage enhancement and power consumption.

The patent changes the parameter of repetition number indication by using variable-length fields based on MCS. The repetition number indicator field length is adjusted according to the MCS value, allowing the system to optimize between coverage and power consumption by selecting appropriate parameter configurations for different channel conditions.

The patent segments the DCI structure by dividing the repetition number indication into multiple fields with different lengths based on MCS values. This segmentation allows precise control of repetition numbers while keeping each individual field compact, thereby maintaining transmission control precision without excessively increasing overall DCI bit overhead and processing complexity.

The patent uses dynamic field length adjustment in DCI based on MCS values. The repetition number indicator field length changes dynamically according to the MCS, providing precise transmission control when needed (high MCS) while reducing overhead when less precision is required (low MCS), thus balancing control precision with device complexity.