Method for processing NDI in random access procedure and a method for transmitting and receiving a signal using the same

• US 9,137,824 B2
• Filed: 01/29/2013
• Issued: 09/15/2015
• Est. Priority Date: 07/03/2008
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sung Jun, Yi, Seung June, Lee, Young Dae, Chun, Sung Duck
• Primary Examiner(s): Nguyen, Brian D
• Assistant Examiner(s): NGUYEN, TOAN D
• Application Number:
  US13/753,237
• Publication Number:
  US 20130142152A1
• Time in Patent Office: 959 Days
• Field of Search: 370/328, 370/329, 370/333, 370/349, 370/431, 714/751
• US Class Current: 1/1
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1822 involving configuration of automatic repeat request [ARQ] with parallel processes
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• 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
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

A method for a user equipment (UE) to receive a downlink signal, the method including receiving a first downlink control channel identified by a temporary cell identifier (Temporary C-RNTI) from a base station, the first downlink control channel including a first downlink assignment signal having a new data indicator (NDI) with a first value; receiving a second downlink control channel identified by a cell identifier (C-RNTI) from the base station, the second downlink control channel including a second downlink assignment signal having the NDI with a second value; and determining if the NDI has been toggled compared to the NDI previously received from the base station. Further, the UE ignores the NDI with the first value received through the first downlink control channel identified by the temporary cell identifier (Temporary C-RNTI). The method also includes receiving the downlink signal based on the determining.

Claims

1. A method for a user equipment (UE) to transmit an uplink signal, the method comprising:

receiving, by the UE, a first uplink grant including a first new data indicator (NDI) of a hybrid automatic repeat request (HARQ) process;

comparing, by the UE, the first NDI of the HARQ process to a second NDI of the HARQ process;

based on the comparing, determining, by the UE, whether the first NDI of the HARQ process has been toggled; and

transmitting, by the UE, the uplink signal based on a result of the determining,

wherein the second NDI of the HARQ process is included in a second uplink grant that was previously received by the UE and was not identified by a temporary cell identifier.

2. The method of claim 1, wherein the transmitting of the uplink signal comprises transmitting new data for the HARQ process when the UE determines that the first NDI of the HARQ process has been toggled.

3. The method of claim 1, wherein the transmitting of the uplink signal comprises transmitting retransmission data for the HARQ process when the UE determines that the first NDI of the HARQ process has not been toggled.

4. The method of claim 1, wherein the first uplink grant is received after a random access procedure.

5. The method of claim 1, wherein the temporary cell identifier is a temporary cell radio network temporary identifier (temporary C-RNTI).

6. A user equipment (UE) comprising:

a physical layer module configured to receive a first uplink grant including and a first new data indicator (NDI) of a hybrid automatic repeat request (HARQ) process compare the first NDI of the HARQ process to a second NDI of the HARQ process; and

a medium access control (MAC) layer module configured to make a determination, based on the comparison, whether the first NDI of the HARQ process has been toggled,

wherein the physical layer module is further configured to transmit an uplink signal based on a result of the determination

wherein the second NDI of the HARQ process is included in a second uplink grant that was previously received by the physical layer module and was not identified by a temporary cell identifier.

7. The UE of claim 6, wherein the physical layer module is further configured to transmit new data for the HARQ process when the MAC layer module determines that the first NDI of the HARQ process has been toggled.

8. The UE of claim 6, wherein the physical layer module is further configured to transmit retransmission data for the HARQ process when the MAC layer module determines that the first NDI of the HARQ process has not been toggled.

9. The UE of claim 6, wherein the first uplink grant is received after a random access procedure.

10. The UE of claim 6, wherein the temporary cell identifier is a temporary cell radio network temporary identifier (temporary C-RNTI).