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

Patent metadata

Field	Value
Publication number	US-10278207-B2
Application number	US-201515517919-A
Country	US
Kind code	B2
Filing date	Oct 21, 2015
Priority date	Oct 21, 2014
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

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.

First claim

What is claimed is:

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.

Assignees

• Lg Electronics Inc

Inventors

• Lee Seungmin
• Seo Hanbyul

Classifications

• H04W72/23 Primary

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W28/06

  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 title

• H04L1/1812

  Hybrid protocols; Hybrid automatic repeat request [HARQ] · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04W72/12

  Wireless traffic scheduling · CPC title