Methods and apparatus for enhancement for HARQ with channel repetitions

• US 10,367,611 B2
• Filed: 08/21/2017
• Issued: 07/30/2019
• Est. Priority Date: 04/17/2015
• Status: Active Grant

• Current Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Original Assignee: HFI Innovation, Inc. (MediaTek, Inc.)
• Inventors: Chen, Tao, Chen, Hua-Min, Wu, Min
• Primary Examiner(s): Chaudry, Mujtaba M
• Application Number:
  US15/681,786
• Publication Number:
  US 20170346607A1
• Time in Patent Office: 708 Days
• Field of Search: None
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1864 ARQ related signaling H04L1/1607 takes precedence
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

Methods are provided for HARQ with channel repetitions. In one novel aspect, the user equipment (UE) receives the resource grant and determines the type of the grant as being the initial resource grant or the secondary resource grant. The initial resource grant carries full control information and the secondary resource grant carries partial control information. In some embodiments, the determination of the type of the grant is based on the RNTI or the payload size. In another embodiment, the UE performs data retransmission based on information from the secondary resource grant and the initial resource grant. In another novel aspect, the UE receives higher layer, such the RRC layer. The UE subsequently receives UL or DL secondary resource grant for both initial transmission and the re-transmission. The UE combines the parameters in the UE-specific configuration and the received secondary resource grants for its UL transmission or DL reception.

Claims

1. A method comprising:

receiving a resource grant by a user equipment (UE) in a wireless network, wherein the resource grant includes a repetition number for repeatedly transmission;

determining a type of the resource grant of being an initial resource grant or a secondary resource grant, wherein the initial resource grant carries full control information and the secondary resource grant carries partial control information; and

performing a data transmission based on the received resource grant, wherein the data transmission is a uplink (UL) data transmission or a downlink (DL) data reception.

2. The method of claim 1, wherein the determination of the type of the resource grant is at least based on a radio network temporary identifier (RNTI) scrambled in CRC, and wherein a cell RNTI (C-RNTI) is configured for the initial resource grant and a secondary RNTI (S-RNTI) is configured for the secondary resource grant.

3. The method of claim 2, wherein the determination of the type of the resource grant is based on a payload size of the resource grant, and wherein the payload size for the initial resource grant is greater than the secondary payload size.

4. The method of claim 1, wherein the full control information comprises at least one of the following parameters:

a frequency hopping pattern index, a number of repetition for transmission, a RV sequence number, an UL/DL flag, an ACK/NACK flag and a new data indicator.

5. The method of claim 1, wherein the partial control information further comprises at least one of the following parameters:

a frequency hopping pattern index, RV sequence number, an ACK/NACK flag and an UL/DL flag.

6. The method of claim 1, wherein the data transmission is an initial transmission, and wherein the transmission is based on the initial resource grant.

7. The method of claim 1, wherein the data transmission is a re-transmission, and wherein the re-transmission is based on parameter settings in the received secondary resource grant and remaining parameter settings in the corresponding initial resource grant.

8. A method comprising:

establishing a radio resource control (RRC) connection by a user equipment (UE) to a base station in a wireless network;

receiving higher layer UE-specific resource-grant information for the UE;

receiving a secondary resource grant, wherein the secondary resource grant carries partial control information, and the partial control information comprises a number of repetition for transmission; and

performing a data transmission with a repetition number based on parameter settings in the received UE-specific resource-grant information and the received secondary resource grant, wherein the data transmission is either an initial data transmission or a re-transmission.

9. The method of claim 8, wherein the UE-specific resource-grant information is received during a RRC connection establishment.

10. The method of claim 8, wherein the partial control information further comprises at least one of the following parameters:

a frequency hopping pattern index, a RV sequence number, an ACK/NACK flag and an UL/DL flag.

11. A user equipment (UE), comprising:

a RF transceiver that transmits and receives radio signals a wireless network;

a resource grant receiver that receives a resource grant, wherein the resource grant includes a repetition number for repeatedly transmission;

a resource-type detector that determines a type of the resource grant of being an initial resource grant or a secondary resource grant, wherein the initial resource grant carries full control information and the secondary resource grant carries partial control information; and

a data transmission controller that performs a data transmission based on the received resource grant, wherein the data transmission is a uplink (UL) data transmission or a downlink (DL) data reception.

12. The UE of claim 11, wherein the determination of the type of the resource grant is at least based on a radio network temporary identifier (RNTI) scrambled in CRC, and wherein a cell RNTI (C-RNTI) is configured for the initial resource grant and a secondary RNTI (S-RNTI) is configured for the secondary resource grant.

13. The UE of claim 12, wherein the determination of the type of the resource grant is based on a payload size of the resource grant, and wherein the payload size for the initial resource grant is greater than the secondary payload size.

14. The UE of claim 11, wherein the full control information comprises at least one of the following parameters:

a frequency hopping pattern index, a number of repetition for transmission, a RV sequence number, an UL/DL flag, an ACK/NACK flag and a new data indicator.

15. The UE of claim 11, wherein the partial information comprises at least one of the following parameters:

a frequency hopping pattern index, a number of repetition for transmission, a RV sequence number, an ACK/NACK flag and an UL/DL flag.

16. The UE of claim 11, wherein the transmission is an initial transmission, and wherein the transmission is based on the initial resource grant.

17. The UE of claim 11, wherein the transmission is a re-transmission, and wherein the re-transmission is based on parameter settings in the received secondary resource grant and remaining parameter settings in the corresponding initial resource grant.

18. A user equipment (UE), comprising:

a RF transceiver that transmits and receives radio signals a wireless network;

a resource configurator that receives higher layer UE-specific resource-grant information for the UE;

a resource grant receiver that receives a secondary resource grant, wherein the secondary resource grant carries partial control information; and

a data transmission controller that performs a data transmission with a repetition number based on parameter settings in the received UE-specific resource-grant information and the received secondary resource grant, wherein the data transmission is either an initial data transmission or a re-transmission.

19. The UE of claim 18, wherein the UE-specific resource-grant information is received during a RRC connection establishment.

20. The UE of claim 18, wherein the partial control information comprises at least one of the following parameters:

a frequency hopping pattern index, a number of repetition for transmission, a RV sequence number, an ACK/NACK flag and an UL/DL flag.