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

• US 10,321,444 B2
• Filed: 06/02/2017
• Issued: 06/11/2019
• 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:
  US15/612,864
• Publication Number:
  US 20170273074A1
• Time in Patent Office: 739 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. A method for transmitting an uplink signal by a user equipment (UE), the method comprising:

receiving an uplink grant including a new data indicator (NDI) through 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 through a physical uplink shared channel (PUSCH) to the network when the NDI has been toggled.

2. The method of claim 1, further comprising:

performing a retransmission through the PUSCH, when the NDI has not been toggled.

3. A user equipment (UE) comprising:

a receiver configured to receive an uplink grant including a new data indicator (NDI) through a physical downlink control channel (PDCCH) from a network;

a processor configured to determine whether the PDCCH is not addressed to a temporary cell identifier, and to determine whether the NDI has been toggled when the PDCCH is not addressed to the temporary cell identifier; and

a transmitter configured to transmit a new data through a physical uplink shared channel (PUSCH) to the network when the NDI has been toggled.

4. The UE of claim 3, wherein the processor is further configured to control the transmitter to perform a retransmission through the PUSCH, when the NDI has not been toggled.