Method for transmitting/receiving D2D signal in wireless communication system and apparatus therefor

• US 10,278,207 B2
• Filed: 10/21/2015
• Issued: 04/30/2019
• Est. Priority Date: 10/21/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Seungmin, Seo, Hanbyul
• Primary Examiner(s): Elliott, IV, Benjamin H
• Application Number:
  US15/517,919
• Publication Number:
  US 20170311344A1
• Time in Patent Office: 1,287 Days
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 27/3836 in which the carrier is recovered using the received modulated signal or the received IF signal, e.g. by detecting a pilot or by frequency multiplication
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/0035 detecting errors in frequency or phase
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 76/28 Discontinuous transmission [DTX]; Discontinuous reception [DRX]
• CPC Class Codes: H04W 92/18 between terminal devices

Abstract

The present invention relates to a method and apparatus for monitoring a downlink control channel by a first terminal having a single RX chain in a wireless communication system. Specifically, the present invention comprises the steps of: setting a particular gap for a resource area related to device-to-device (D2D) signal transmission/reception; and monitoring a wide area network (WAN) communication-based downlink control channel on the basis of a timer performed according to a discontinuous reception (DRX) operation, wherein the timer is counted on the basis of at least one subframe which does not overlap with the particular gap, and the particular gap is a time interval set for allowing the single RX chain to cover a switching operation between WMN communication and D2D communication.

Claims

1. A method for monitoring a downlink control channel by a first user equipment (UE) having a single reception (RX) chain in a wireless communication system, the method comprising:

configuring a resource region related to transmission and reception of a Device-to-Device (D2D) signal as a gap; and

monitoring a Wide Area Network (WAN) communication-based downlink control channel based on a timer operated according to a discontinuous reception (DRX) operation,

wherein the timer is counted based on at least one subframe not included in the resource region configured as the gap,

wherein the gap is a time interval configured for switching between WAN communication and D2D communication.

2. The method according to claim 1, wherein, when the first UE supports carrier aggregation (CA) and WAN communication is enabled in at least one of a first cell or a second cell for the CA, the timer is configured to be counted including the resource region configured as the gap.

3. A first user equipment (UE) for monitoring a downlink control channel having a single reception (RX) chain in a wireless communication system, the UE comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to;

configure a resource region related to transmission and reception of a Device-to-Device (D2D) signal as a gap; and

monitor a Wide Area Network (WAN) communication-based downlink control channel based on a timer operated according to a discontinuous reception (DRX) operation,

wherein the timer is counted based on at least one subframe not included in the resource region configured as the gap,

wherein the gap is a time interval configured for switching between WAN communication and D2D communication.

4. A method for performing a random access procedure by a first user equipment (UE) having a single reception (RX) chain in a wireless communication system, the method comprising:

configuring a random access response (RAR) window for performing a Wide region Network (WAN) based random access procedure; and

configuring a resource region related to transmission and reception of a Device-to-Device (D2D) signal and a gap for the resource region,

wherein the gap is a time interval configured for switching between WAN communication and D2D communication,

wherein the resource region and the gap are configured only when the RAR window does not overlap the resource region and the specific gap.