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

• US 10,667,248 B2
• Filed: 05/14/2019
• Issued: 05/26/2020
• 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, Sungduck
• Primary Examiner(s): Phunkulh, Bob A
• Application Number:
  US16/411,360
• Publication Number:
  US 20190268900A1
• Time in Patent Office: 378 Days
• Field of Search: None
• 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 transmitting an uplink signal by a user equipment (UE). The method includes receiving an uplink grant including a new data indicator (NDI) on a physical downlink control channel (PDCCH) from a network, determining whether the PDCCH is not addressed to a temporary cell identifier, determining whether the NDI has been toggled when the PDCCH is not addressed to the temporary cell identifier, and transmitting a new data to the network when the NDI has been toggled.

Claims

1. An apparatus configured to perform wireless communications, the apparatus comprising:

a transmission module;

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising;

determining whether a physical downlink control channel (PDCCH) carrying an uplink grant is not addressed to a temporary cell identifier;

based on a determination that the PDCCH is not addressed to the temporary cell identifier, determining whether a new data indicator (NDI) included in the uplink grant has been toggled; and

controlling the transmission module for transmitting a new data to a network, based on a determination that the NDI has been toggled.

2. The apparatus of claim 1, wherein the operations further comprise:

performing a retransmission, based on a determination that the NDI has not been toggled.

3. The apparatus of claim 1, wherein the operations further comprise:

controlling the transmission module for receiving the PDCCH from the network.

4. An apparatus configured to perform wireless communications, the apparatus comprising:

a reception module;

at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising;

controlling the reception module for receiving a physical downlink control channel (PDCCH) carrying a downlink assignment from a network and for receiving a downlink data based on the downlink assignment from the network;

determining whether the PDCCH is not addressed to a temporary cell identifier;

based on a determination that the PDCCH is not addressed to the temporary cell identifier, determining whether a new data indicator (NDI) included in the downlink assignment has been toggled; and

processing the received downlink data based on whether the NDI has been determined to be toggled.

5. The apparatus of claim 4, wherein the operations further comprise:

based on the NDI having been determined to be toggled, processing the downlink data as a new transmission.

6. The apparatus of claim 4, wherein the operations further comprise:

based on the NDI having been determined not to be toggled, processing the downlink data as a retransmission.

7. A method performed by an apparatus configured for wireless communications, the method comprising:

determining whether a physical downlink control channel (PDCCH) carrying an uplink grant is not addressed to a temporary cell identifier;

based on a determination that the PDCCH is not addressed to the temporary cell identifier, determining whether a new data indicator (NDI) included in the uplink grant has been toggled; and

transmitting a new data to a network, based on a determination that the NDI has been toggled.

8. The method of claim 7, further comprising:

performing a retransmission, based on a determination that the NDI has not been toggled.

9. The method of claim 7, further comprising:

receiving the PDCCH from the network.