METHOD OF PERFORMING DATA TRANSMISSION CORRESPONDING TO SEMI-PERSISTENT RESOURCES IN WIRELESS COMMUNICATIONS SYSTEM AND RELATED DEVICE

• US 20100075690A1
• Filed: 09/15/2009
• Published: 03/25/2010
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wu, Chih-Hsiang
• Granted Patent: US 8,509,795 B2
• Time in Patent Office: Days
• US Class Current: 455/452.100
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

A method of performing data transmission corresponding to semi-persistent resources for a user equipment of a wireless communication system includes performing a data transmission process corresponding to a communications link according to a semi-persistent grant in a transmission opportunity of the semi-persistent grant when no non-semi-persistent grant is found on a physical channel for the transmission opportunity of the semi-persistent grant, where the semi-persistent grant and the non-semi-persistent grant correspond to the communications link.

Claims

1. A method of performing data transmission corresponding to semi-persistent resources for a user equipment of a wireless communication system, the method comprising:

performing a data transmission process corresponding to a communications link according to a semi-persistent grant in a transmission opportunity of the semi-persistent grant when no non-semi-persistent grant is found on a physical channel for the transmission opportunity of the semi-persistent grant;

wherein the semi-persistent grant and the non-semi-persistent grant correspond to the communications link.

2. The method of claim 1 further comprising performing the data transmission process according to the semi-persistent grant in a transmission opportunity of the semi-persistent grant when none of a non-semi-persistent grant, a cell identifier of the user equipment, and a semi-persistent scheduling cell identifier of the user equipment is found on a physical channel for the transmission opportunity of the semi-persistent grant.

3. The method of claim 1 further comprising stopping the data transmission process in the transmission opportunity of the semi-persistent grant when a non-semi-persistent grant whose frequency allocation collides with frequency allocation of the semi-persistent grant is found on the physical channel.

4. The method of claim 3 further comprising detecting a cell identifier of the user equipment and a semi-persistent scheduling cell identifier of the user equipment on the physical channel for the transmission opportunity of the semi-persistent downlink grant, wherein neither cell identifier of the user equipment nor semi-persistent scheduling cell identifier of the user equipment is found on the physical channel for the transmission opportunity of the semi-persistent downlink grant.

5. The method of claim 1, wherein the communications link is a downlink and the data transmission process is receiving a data block.

6. The method of claim 5 further comprising performing reception of the data block according to the non-semi-persistent downlink grant in the transmission opportunity of the semi-persistent downlink grant when the non-semi-persistent downlink grant, whose frequency allocation collides with frequency allocation of the semi-persistent downlink grant, and a system information identifier are found on the physical channel for the transmission opportunity of the semi-persistent downlink grant.

7. The method of claim 1, wherein the communications link is an uplink, and the data transmission process is an uplink new transmission or an uplink retransmission.

8. The method of claim 1 further comprising performing the data transmission process according to the non-semi-persistent grant in the transmission opportunity of the semi-persistent grant when the non-semi-persistent grant and a cell identifier of the user equipment are found on the physical channel for the transmission opportunity of the semi-persistent grant.

9. The method of claim 8, wherein the communications link is a downlink and the data transmission process is receiving a data block.

10. The method of claim 9 further comprising when the non-semi-persistent grant found on the physical channel is addressed to the SPS HARQ process, determining that the data block is a new data block.

11. The method of claim 10, wherein determining that the data block is a new data block comprises clearing a soft buffer of a semi-persistent scheduling hybrid automatic repeat request, abbreviated to SPS HARQ, process in advance of receiving the data block.

12. The method of claim 9, wherein the non-semi-persistent grant comprises a new data indicator that is set to 0 or 1.

13. The method of claim 9 further comprising performing soft combination of the received data block and data in a soft buffer of an SPS HARQ process when the non-semi-persistent grant comprises a new data indicator that is set to 1.

14. The method of claim 8, wherein the communications link is an uplink and the data transmission process is transmitting a new data block.

15. The method of claim 14, wherein the non-semi-persistent grant comprises a new data indicator that is set to 0 or 1.

16. The method of claim 8, wherein the communications link is an uplink and the data transmission process is retransmitting a data block according to the non-semi-persistent grant when the non-semi-persistent grant comprises a new data indicator that is set to 1.

17. The method of claim 1, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.

18. A communication device of a wireless communication system for accurately performing data transmission corresponding to semi-persistent resources, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process;

a processor coupled to the computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

performing a data transmission process corresponding to a communications link according to a semi-persistent grant in a transmission opportunity of the semi-persistent grant when no non-semi-persistent grant is found on a physical channel for the transmission opportunity of the semi-persistent grant;

wherein the semi-persistent grant and the non-semi-persistent grant correspond to the communications link.

19. The communication device of claim 18, wherein the process further comprises performing the data transmission process according to the semi-persistent grant in a transmission opportunity of the semi-persistent grant when none of a non-semi-persistent grant, a cell identifier of the communication device, and a semi-persistent scheduling cell identifier of the communication device is found on a physical channel for the transmission opportunity of the semi-persistent grant.

20. The communication device of claim 18, wherein the process further comprises stopping the data transmission process in the transmission opportunity of the semi-persistent grant when a non-semi-persistent grant whose frequency allocation collides with frequency allocation of the semi-persistent grant is found on the physical channel, and neither a cell identifier of the communication device nor a semi-persistent scheduling cell identifier of the communication device is found on the physical channel for the transmission opportunity of the semi-persistent downlink grant.

21. The communication device of claim 20, wherein the process further comprises detecting a cell identifier of the user equipment and a semi-persistent scheduling cell identifier of the user equipment on the physical channel for the transmission opportunity of the semi-persistent downlink grant, wherein neither cell identifier of the user equipment nor semi-persistent scheduling cell identifier of the user equipment is found on the physical channel for the transmission opportunity of the semi-persistent downlink grant.

22. The communication device of claim 18, wherein the communications link is a downlink and the data transmission process is receiving a data block.

23. The communication device of claim 22, wherein the process further comprises performing reception of the data block according to the non-semi-persistent downlink grant in the transmission opportunity of the semi-persistent downlink grant when the non-semi-persistent downlink grant, whose frequency allocation collides with frequency allocation of the semi-persistent downlink grant, and a system information identifier are found on the physical channel for the transmission opportunity of the semi-persistent downlink grant.

24. The communication device of claim 18, wherein the communications link is an uplink, and the data transmission process is an uplink new transmission or an uplink retransmission.

25. The communication device of claim 18, wherein the process further comprises performing the data transmission process according to the non-semi-persistent grant in the transmission opportunity of the semi-persistent grant when the non-semi-persistent grant and a cell identifier of the communication device are found on the physical channel for the transmission opportunity of the semi-persistent grant.

26. The communication device of claim 25, wherein the communications link is a downlink and the data transmission process is receiving a data block.

27. The communication device of claim 26, wherein the process further comprises when the non-semi-persistent grant found on the physical channel is addressed to the SPS HARQ process, determining that the data block is a new data block.

28. The communication device of claim 27, wherein determining that the data block is a new data block comprises clearing a soft buffer of a semi-persistent scheduling hybrid automatic repeat request, abbreviated to SPS HARQ, process in advance of receiving the data block.

29. The method of claim 26, wherein the non-semi-persistent grant comprises a new data indicator that is set to 0 or 1.

30. The communication device of claim 26, wherein the process further comprises performing soft combination of the received data block and data in a soft buffer of an SPS HARQ process when the non-semi-persistent grant comprises a new data indicator that is set to 1.

31. The communication device of claim 25, wherein the communications link is an uplink and the data transmission process is transmitting a new data block.

32. The communication device of claim 31, wherein the non-semi-persistent grant comprises a new data indicator that is set to 0 or 1.

33. The communication device of claim 25, wherein the communications link is an uplink and the data transmission process is retransmitting a data block according to the non-semi-persistent grant when the non-semi-persistent grant comprises a new data indicator that is set to 1.

34. The communication device of claim 18, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.

35. A method of performing data transmission corresponding to semi-persistent resources for a user equipment of a wireless communication system, the method comprising:

performing a data transmission process corresponding to a first communications link according to a semi-persistent grant corresponding to the first communications link in a transmission opportunity of the semi-persistent grant when a non-semi-persistent grant corresponding to a second communications link and a cell identifier of the user equipment are found on a physical channel for the transmission opportunity of the semi-persistent grant.

36. The method of claim 35, wherein the first communications link is a downlink, the second communications link is an uplink, and the data transmission process is receiving a data block.

37. The method of claim 35, wherein the first communications link is an uplink, the second communications link is a downlink, and the data transmission process is an uplink new transmission or an uplink retransmission.

38. The method of claim 35, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.

39. A communication device of a wireless communication system for accurately performing data transmission corresponding to semi-persistent resources, the communication device comprising:

a computer readable recording medium for storing program code corresponding to a process;

a processor coupled to the computer readable recording medium, for processing the program code to execute the process;

wherein the process comprises;

performing a data transmission process corresponding to a first communications link according to a semi-persistent grant corresponding to the first communications link in a transmission opportunity of the semi-persistent grant when a non-semi-persistent grant corresponding to a second communications link and a cell identifier of the communication device are found on a physical channel for the transmission opportunity of the semi-persistent grant.

40. The communication device of claim 39, wherein the first communications link is a downlink, the second communications link is an uplink, and the data transmission process is receiving a data block.

41. The communication device of claim 39, wherein the first communications link is an uplink, the second communications link is a downlink, and the data transmission process is an uplink new transmission or an uplink retransmission.

42. The communication device of claim 39, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.