Patent ID: 8824423

Claim:
A method of improving a hybrid automatic repeat request, abbreviated to HARQ, procedure in the transition of transmission time interval, abbreviated to TTI, bundling for a medium access control layer of a user equipment in a wireless communication system, the method comprising: activating TTI bundling upon receiving a bundling activation command; and using a first number of unused HARQ processes in the first round trip time (RTT) after TTI bundling is activated to continue, in a bundling way, the first number of unfinished HARQ processes which have not been finished before TTI bundling is activated; wherein the first number is equivalent to the total number of unfinished HARQ processes when the total number of unfinished HARQ processes is smaller than or equal to the total number of unused HARQ processes which are available in the first RTT after TTI bundling is activated, and the first number is equivalent to the total number of unused HARQ processes which are available in the first RTT after TTI bundling is activated when the total number of unfinished HARQ processes is larger than the total number of unused HARQ processes which are available in the first RTT after TTI bundling is activated.