Scheduling method for user equipment end of Narrowband Internet of Things

A scheduling method for user equipment (UE) of Narrowband Internet of Things (NB-IoT), comprising:

• synchronizing with a cell;
• receiving at least one system information parameter from the cell, wherein the at least one system information parameter comprises a maximum number of repetitions, a period and an offset of Narrowband Physical Downlink Control Channel (NPDCCH) search spaces;
• establishing a list based on the at least one system information parameter, wherein a plurality of available subframes is directly or indirectly listed in the list, and each available subframe is labeled with an index;
• calculating a numeral of a first start subframe of a target NPDCCH repetitions based on a numeral of a target subframe, the period and the offset;
• using the numeral of the first start subframe to search the list for a start index corresponding to the first start subframe;
• searching the list for a target index corresponding to the target subframe;
• determining whether the target subframe is within an interval of the target NPDCCH repetitions based on a determination as to whether a difference between the start index and the target index is smaller than the maximum number of repetitions;
• and
• searching for the first start subframe of the target NPDCCH repetitions, or searching for a second start subframe of a next NPDCCH repetitions;
• wherein the next NPDCCH repetitions immediately follows the target NPDCCH repetitions.

A scheduling method for user equipment (UE) of Narrowband Internet of Things (NB-IoT), comprising:

• synchronizing with a cell;
• receiving at least one system information parameter from the cell, wherein the at least one system information parameter comprises a maximum number of repetitions, a period and an offset of Narrowband Physical Downlink Control Channel (NPDCCH) search spaces;
• establishing a list based on the at least one system information parameter, wherein a plurality of available subframes is directly or indirectly listed in the list, and each available subframe is labeled with an index;
• calculating a numeral of a start subframe of a target NPDCCH repetitions based on a numeral of a target subframe, the period and the offset;
• using the numeral of the start subframe to search the list for a start index corresponding to the start subframe;
• searching the list for a target index corresponding to the target subframe;
• determining whether the target subframe is within an interval of the target NPDCCH repetitions based on a determination as to whether a difference between the start index and the target index is smaller than the maximum number of repetitions;
• and
• searching for a first end subframe of the target NPDCCH repetitions, or searching for a second end subframe of a next NPDCCH repetitions;
• wherein the next NPDCCH repetitions immediately follows the target NPDCCH repetitions.