Method and Apparatus for Handling HARQ Process of Semi-Persistent Scheduling

• US 20100058135A1
• Filed: 08/25/2009
• Published: 03/04/2010
• Est. Priority Date: 08/27/2008
• Status: Active Grant

• Current Assignee: Innovative Sonic Limited
• Original Assignee: Innovative Sonic Limited
• Inventors: Tseng, Li-Chih
• Granted Patent: US 9,979,514 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A method of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system is disclosed. The method includes steps of configuring an SPS functionality which utilizes at least one HARQ process; receiving a first new data indicator (NDI) addressed to an SPS cell radio network temporary identifier (SPS C-RNTI) of the UE for a first HARQ process of the at least one HARQ process; and considering the next transmission to be received by the first HARQ Process as a first transmission of the first HARQ Process when receiving a second NDI addressed to a C-RNTI of the UE for the first HARQ process.

Claims

1. A method of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the method comprising:

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a first new data indicator (NDI) addressed to an SPS cell radio network temporary identifier (SPS C-RNTI) of the UE for a first HARQ process of the at least one HARQ process; and

considering a next transmission to be received by the first HARQ process as a first transmission of the first HARQ process when receiving a second NDI addressed to a C-RNTI of the UE for the first HARQ process.

2. The method of claim 1, wherein the first transmission of the first HARQ process means a new transmission.

3. A communication device of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a first new data indicator (NDI) addressed to an SPS cell radio network temporary identifier (SPS C-RNTI) of the UE for a first HARQ process of the at least one HARQ process; and

considering a next transmission to be received by the first HARQ process as a first transmission of the first HARQ process when receiving a second NDI addressed to a C-RNTI of the UE for the first HARQ process.

4. The communication device of claim 3, wherein the first transmission of the first HARQ process means a new transmission.

5. A method of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the method comprising:

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a pre-assigned transmission by a first HARQ process of the at least one HARQ process according to configurations of the SPS functionality; and

considering a next transmission to be received by the first HARQ process as a first transmission of the first HARQ process when receiving a new data indicator (NDI) addressed to a Cell Radio Network Temporary Identifier (C-RNTI) of the UE for the first HARQ process.

6. The method of claim 5, wherein the first transmission of the first HARQ process means a new transmission.

7. A communication device of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a pre-assigned transmission by a first HARQ process of the at least one HARQ process according to configurations of the SPS functionality; and

considering a next transmission to be received by the first HARQ process as a first transmission of the first HARQ Process when receiving a new data indicator (NDI) addressed to a Cell Radio Network Temporary Identifier (C-RNTI) of the UE for the first HARQ process.

8. The communication device of claim 7, wherein the first transmission of the first HARQ process means a new transmission.

9. A method of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the method comprising:

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a first New Data indicator (NDI) addressed to a cell radio network temporary identifier (C-RNTI) of the UE for a first HARQ process of the at least one HARQ process; and

comparing the first NDI with a second NDI previously addressed to the C-RNTI for the first HARQ process to determine whether a transmission to be received by the first HARQ process is a new transmission;

wherein the UE receives a third NDI addressed to an SPS C-RNTI of the UE for the first HARQ process or receives a pre-assigned transmission by the first HARQ process between reception of the first NDI and the second NDI.

10. The method of claim 9, wherein the step of comparing the first NDI with the second NDI previously addressed to the C-RNTI for the first HARQ process to determine whether the transmission to be received by the first HARQ process is a new transmission comprising:

determining the transmission to be received by the first HARQ process is a new transmission when values of the first NDI and the second NDI are different; and

determining the transmission to be received by the first HARQ process is a retransmission when the values of the first NDI and the second NDI are the same.

12. The communication device of claim 9, wherein the step of comparing the first NDI with the second NDI previously addressed to the C-RNTI for the first HARQ process to determine whether the transmission to be received by the first HARQ process is a new transmission comprising:

determining the transmission to be received by the first HARQ process is a new transmission when values of the first NDI and the second NDI are different; and

determining the transmission to be received by the first HARQ process is a retransmission when the values of the first NDI and the second NDI are the same.

11. A communication device of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a first New Data indicator (NDI) addressed to a cell radio network temporary identifier (C-RNTI) of the UE for a first HARQ process of the at least one HARQ process; and

comparing the first NDI with a second NDI previously addressed to the C-RNTI for the first HARQ process to determine whether a transmission to be received by the first HARQ process is a new transmission;

wherein the UE receives a third NDI addressed to an SPS C-RNTI of the UE for the first HARQ process or receives a pre-assigned transmission by the first HARQ process between reception of the first NDI and the second NDI.

13. A method of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the method comprising:

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a physical downlink control channel (PDCCH) signaling addressed to an SPS Cell Radio Network Temporary Identifier (SPS C-RNTI)of the UE, the PDCCH signaling indicating the UE to deactivate the SPS functionality; and

flushing all HARQ buffers of the at least one HARQ process or considering all next transmission to be received by the at least one HARQ process as a first transmission.

14. The method of claim 13, wherein the first transmission means a new transmission.

15. A communication device of handling a hybrid automatic repeat request (HARQ) process for semi-persistent scheduling (SPS) in a user equipment (UE) of a wireless communication system, the communication device comprising:

a processor for executing a program; and

a memory coupled to the processor for storing the program;

wherein the program comprises;

configuring an SPS functionality, the SPS functionality utilizing at least one HARQ process;

receiving a physical downlink control channel (PDCCH) signaling addressed to an SPS Cell Radio Network Temporary Identifier (SPS C-RNTI)of the UE, the PDCCH signaling indicating the UE to deactivate the SPS functionality; and

flushing all HARQ buffers of the at least one HARQ process or considering all next transmission to be received by the at least one HARQ process as a first transmission.

16. The communication device of claim 15, wherein the first transmission means a new transmission.