Method for determining hybrid automatic repeat request process number, base station, and user equipment

A user equipment, comprising:

• a processor;
• a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of:
• receiving downlink control information associated with current downlink data;
• determining whether a hybrid automatic repeat request (HARQ) process number field in the downlink control information is a predetermined value representing at least a first HARQ process number and a second HARQ process number, and determining an HARQ number allocated to the current downlink data according to a reception state of downlink data transmitted before the current downlink data when it is determined that the HARQ process number field is the predetermined value,
• wherein when the downlink data transmitted before the current downlink data comprises first data to which the first HARQ process number is allocated and second data to which the second HARQ process number is allocated, the processor is configured to
• determine that the first HARQ process number is allocated to the current downlink data when both the first data and the second data are successfully received;
• or
• determine that an HARQ process number for which data transmission is completed firstly in the first data and the second data is allocated to the current downlink data when neither the first data nor the second data is successfully received;
• or
• determine that the second HARQ process number is allocated to the current downlink data when the first data is successfully received while the second data is not successfully received.

A base station, comprising:

• a processor;
• a storage medium having computer program instructions stored thereon, wherein the computer program instructions, when executed by the processor, perform processing of:
• determining that whether downlink data satisfies a predetermined condition;
• notifying a hybrid automatic repeat request (HARQ) process number allocated to the downlink data with an HARQ process number field and an additional field in downlink control information when the downlink data satisfies the predetermined condition,
• wherein the additional field is a frequency hopping field in the downlink control information, and wherein the processor is configured to notify the HARQ process number allocated to the downlink data with a value obtained by combining the HARQ process number field and the additional field.