Method of performing data transmission corresponding to semi-persistent resources in wireless communications system and related device

• US 8,509,795 B2
• Filed: 09/15/2009
• Issued: 08/13/2013
• Est. Priority Date: 09/22/2008
• Status: Active Grant

• Current Assignee: HTC Corporation
• Original Assignee: HTC Corporation
• Inventors: Wu, Chih-Hsiang
• Primary Examiner(s): Batista, Marcos
• Application Number:
  US12/559,511
• Publication Number:
  US 20100075690A1
• Time in Patent Office: 1,428 Days
• Field of Search: 455/452.1, 370/329, 370/336
• US Class Current: 455/452.1
• 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 reception process in a transmission opportunity according to a semi-persistent downlink grant for the transmission opportunity when no non-semi-persistent downlink grant for the transmission opportunity is found on a physical channel; and

when a non-semi-persistent downlink grant and a cell identifier of the user equipment are found on the physical channel and the non-semi-persistent downlink grant is addressed to a semi-persistent scheduling (SPS) hybrid automatic repeat request (HARQ) process, determining that the data reception process is for receiving new data and performing the data reception process in the transmission opportunity according to the non-semi-persistent downlink grant.

2. The method of claim 1 further comprising performing the data reception process in the transmission opportunity according to the semi-persistent downlink grant for a transmission opportunity when none of a non-semi-persistent downlink 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.

3. The method of claim 1 further comprising stopping the data reception process in the transmission opportunity when a non-semi-persistent downlink grant whose frequency allocation collides with frequency allocation of the semi-persistent downlink grant is found and a cell identifier and a semi-persistent scheduling identifier for the user equipment are not found on the physical channel.

4. The method of claim 1 further comprising performing the data reception process in the transmission opportunity according to a non-semi-persistent downlink grant for the transmission opportunity 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.

5. The method of claim 1 further comprising clearing a soft buffer of the SPS HARQ process in advance of receiving new data.

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

7. 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.

8. 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 reception process in a transmission opportunity according to a semi-persistent downlink grant for the transmission opportunity when a non-semi-persistent uplink grant for the opportunity and a cell identifier of the user equipment are found on a physical channel; and

when a non-semi-persistent downlink grant and a cell identifier of the user equipment are found on the physical channel and the non-semi-persistent downlink grant is addressed to a semi-persistent scheduling (SPS) hybrid automatic repeat request (HARQ) process, determining that the data reception process is for receiving new data and performing the data reception process in the transmission opportunity according to the non-semi-persistent downlink grant.

9. The method of claim 8, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.

10. 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 in a transmission opportunity according to a semi-persistent uplink grant for the transmission opportunity when no non-semi-persistent uplink grant for the transmission opportunity is found on a physical channel; and

when a non-semi-persistent uplink grant and a cell identifier of the user equipment are found on the physical channel and the non-semi-persistent uplink grant is addressed to a semi-persistent scheduling (SPS) hybrid automatic repeat request (HARQ) process, determining that the data transmission process is for transmitting new data and performing the data transmission process in the transmission opportunity according to the non-semi-persistent uplink grant.

11. The method of claim 10 further comprising performing the data transmission process in the transmission opportunity according to the semi-persistent uplink grant for a transmission opportunity when none of a non-semi-persistent uplink 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.

12. The method of claim 10 further comprising:

stopping the data transmission process in the transmission opportunity when a non-semi-persistent uplink grant whose frequency allocation collides with frequency allocation of the semi-persistent uplink grant is found and a cell identifier and a semi-persistent scheduling identifier for the user equipment are not found on the physical channel.

13. The method of claim 10, wherein the non-semi-persistent uplink grant comprises a new data indicator that is set to 0 or 1.

14. The method of claim 10, wherein the data transmission process is retransmitting a data block according to the non-semi-persistent uplink grant when the non-semi-persistent uplink grant comprises a new data indicator that is set to 1.

15. The method of claim 10, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.

16. 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 in a transmission opportunity according to a semi-persistent uplink grant for the transmission opportunity when a non-semi-persistent downlink grant for the opportunity and a cell identifier of the user equipment are found on a physical channel; and

when a non-semi-persistent uplink grant and a cell identifier of the user equipment are found on the physical channel and the non-semi-persistent uplink grant is addressed to a semi-persistent scheduling (SPS) hybrid automatic repeat request (HARQ) process, determining that the data transmission process is for transmitting new data and performing the data transmission process in the transmission opportunity according to the non-semi-persistent uplink grant.

17. The method of claim 16, wherein the transmission opportunity is a transmission time interval or a sub-frame used in a physical layer of the wireless communication system.