Grant-free transmission method, user equipment and base station

A grant-free transmission method, comprising:

• step A, receiving, from respective user equipments, first multiple access signatures selected by the respective user equipments;
• step B, predicting mutual interference caused by data transmission performed simultaneously by the respective user equipments using the first multiple access signatures of the respective user equipments, determining a respective user equipment of which mutual interference is predicted to be higher than a predetermined level as a user equipment to be intervened, and determining, for a respective user equipment of which mutual interference is predicted to be not higher than the predetermined level, that to adopt a first multiple access signature of the respective user equipment of which the mutual interference is predicted to be not higher than the predetermined level is an intervention result for the respective user equipment of which the mutual interference is predicted to be not higher than the predetermined level;
• step C, for a respective user equipment to be intervened, selecting a multiple access signature capable of making the mutual interference not higher than the predetermined level as a second multiple access signature of the respective user equipment to be intervened, and determining that to adopt the second multiple access signature is an intervention result for the respective use equipment to be intervened;
• and
• step D, sending intervention results for the respective user equipments.

A base station, comprising:

• a processor;
• a non-transitory machine-readable storage medium;
• and
• a program module stored in the non-transitory machine-readable storage medium and executed by the processor;
• wherein the program module is to:
• step A, receive, from respective user equipments, first multiple access signatures selected by the respective user equipments;
• step B, predict mutual interference caused by data transmission performed simultaneously by the respective user equipments using the first multiple access signatures of the respective user equipments, determine a respective user equipment of which mutual interference is predicted to be higher than a predetermined level as a user equipment to be intervened, and determine, for a respective user equipment of which mutual interference is predicted to be not higher than the predetermined level, that to adopt a first multiple access signature of the respective user equipment of which the mutual interference is predicted to be not higher than the predetermined level is an intervention result for the respective user equipment of which the mutual interference is predicted to be not higher than the predetermined level;
• step C, for a respective user equipment to be intervened, select a multiple access signature capable of making the mutual interference not higher than the predetermined level as a second multiple access signature, and determine that to adopt the second multiple access signature is an intervention result for the respective user equipment to be intervened;
• and
• step D, send intervention results for the respective user equipments.