Hybrid automatic repeat request associations for downlink semi-persistent scheduling
View Patent ↗Disclosed is a user equipment in a wireless communication system, configured to receive a first initial transmission associated with a first Hybrid Automatic Repeat Request (HARQ) process; receive a second initial transmission associated with a second HARQ process; and receive at least one retransmission associated with the first HARQ process, wherein when the second initial transmission occurs before the at least one retransmission, the second HARQ process assigned an HARQ process ID that is different from an HARQ process ID assigned to the first HARQ, and wherein when the second initial transmission occurs after the at least one retransmission, the second HARQ process assigned an HARQ process ID that is the same as an HARQ process ID assigned to the first HARQ process.
1. A user equipment in a wireless communication system, the user equipment configured to:
receive a first initial transmission associated with a first Hybrid Automatic Repeat Request (HARQ) process; and
receive a second initial transmission associated with a second HARQ process,
wherein when the second initial transmission occurs after at least one retransmission associated with the first HARQ process, the second HARQ process is assigned a second HARQ process ID that is the same as a first HARQ process ID assigned to the first HARQ process, and
when the second initial transmission occurs before the at least one retransmission, the second HARQ process ID that is assigned to the second HARQ process is different from the first HARQ process ID.
2. The user equipment of claim 1 , wherein the second initial transmission occurs a predetermined amount of time after the first initial transmission.
3. The user equipment of claim 2 , wherein the predetermined amount of time is twenty milliseconds after the first initial transmission.
4. The user equipment of claim 1 , wherein the second HARQ process ID assigned to the second HARQ process is one greater than the first HARQ process ID assigned to the first HARQ process.
5. The user equipment of claim 1 , wherein the second HARQ process ID assigned to the second HARQ process is the next available HARQ process ID in a sequence of HARQ process IDs.
6. The user equipment of claim 1 , wherein the first HARQ process ID assigned to the first HARQ process is reserved by an access device and the access device informs the user equipment of information related to the first HARQ process ID assigned to the first HARQ process through radio resource control signaling, and wherein the access device designates the second HARQ process ID of the second HARQ process and informs the user equipment of the assigned second HARQ process ID of the second HARQ process through radio resource control signaling.
7. The user equipment of claim 1 , wherein when the second initial transmission
occurs before the at least one retransmission, and the second HARQ process is assigned the second HARQ process ID that is different from the first HARQ process ID, then the second HARQ process is used on a temporary basis only.
8. A method of wireless communication using semi-persistent scheduling, the method comprising:
receiving at a user equipment a first initial transmission associated with a first Hybrid Automatic Repeat Request (HARQ) process; and
receiving at the user equipment a second initial transmission associated with a second HARQ process,
wherein when the second initial transmission occurs after at least one retransmission associated with the first HARQ process, the second HARQ process is assigned a second HARQ process ID that is the same as a first HARQ process ID assigned to the first HARQ process, and
when the second initial transmission occurs before the at least one retransmission, the second HARQ process ID that is assigned to the second HARQ process is different from the first HARQ process ID.
9. The method of claim 8 , wherein the second initial transmission occurs a predetermined amount of time after the first initial transmission.
10. The method of claim 9 , wherein the predetermined amount of time is twenty milliseconds after the first initial transmission.
11. The method of claim 8 , wherein the second HARQ process ID assigned to the second HARQ process is one greater than the first HARQ process ID assigned to the first HARQ process.
12. The method of claim 8 , wherein the second HARQ process ID assigned to the second HARQ process is the next available HARQ process ID in a sequence of HARQ process IDs.
13. The method of claim 8 , wherein the first HARQ process ID assigned to the first HARQ process is reserved by an access device and the access device informs the user equipment of information related to the first HARQ process ID assigned to the first HARQ process through radio resource control signaling, and wherein the access device designates the second HARQ process ID of the second HARQ process and informs the user equipment of the assigned second HARQ process ID of the second HARQ process through radio resource control signaling.
14. The method of claim 8 , wherein when the second initial transmission occurs before the at least one retransmission, and the second HARQ process is assigned the second HARQ process ID that is different from the first HARQ process ID, then the second HARQ process is used on a temporary basis only.
15. A method of wireless communication that associates retransmissions with appropriate initial transmissions, the method comprising:
assigning a first HARQ process ID to a first HARQ process that is associated with a first initial transmission; and
assigning a second HARQ process ID to a second HARQ process that is associated with a second initial transmission,
wherein when the second initial transmission occurs after at least one retransmission associated with the first HARQ process, the second HARQ process ID assigned is the first HARQ process ID, and
when the second initial transmission occurs before the at least one retransmission, the second HARQ process ID assigned is different from the first HARQ process ID.
16. The method of claim 15 , wherein the second initial transmission occurs a predetermined amount of time after the first initial transmission.
17. The method of claim 15 , wherein the second HARQ process ID assigned to the second HARQ process is one greater than the first HARQ process ID assigned to the first HARQ process.
18. The method of claim 15 , wherein the second HARQ process ID assigned to the second HARQ process is the next available HARQ process ID in a sequence of HARQ process IDs.
19. The method of claim 15 , wherein the first HARQ process ID assigned to the first HARQ process is reserved by an access device and the access device informs a user equipment of information related to the first HARQ process ID assigned to the first HARQ process through radio resource control signaling.
20. The method of claim 15 , wherein when the second initial transmission occurs before the at least one retransmission, and the second HARQ process is assigned the second HARQ process ID that is different from the first HARQ process ID assigned to the first HARQ process, then the second HARQ process is used on a temporary basis only.