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Method for transmitting and receiving d2d signal in wireless communication system, and apparatus therefor

a wireless communication system and wireless communication technology, applied in the field of wireless communication systems, can solve the problem of inability to receive a discovery signal transmitted from a specific neighbor, and achieve the effect of efficient signal transmission/reception

Inactive Publication Date: 2019-02-07
LG ELECTRONICS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes a way to efficiently transmit and receive signals between devices in a wireless communication system.

Problems solved by technology

It may also be impossible for the UE to receive a discovery signal transmitted from a specific neighbor cell due to the distance from the cell.

Method used

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  • Method for transmitting and receiving d2d signal in wireless communication system, and apparatus therefor
  • Method for transmitting and receiving d2d signal in wireless communication system, and apparatus therefor
  • Method for transmitting and receiving d2d signal in wireless communication system, and apparatus therefor

Examples

Experimental program
Comparison scheme
Effect test

example 1-1

[0208]According to Embodiment 1 of the present disclosure, the SRXCH_D2D RX UE should blind-search an area ranging from ‘SF#N−w1’ to ‘SF#N+w1’, for neighbor-cell D2DSS reception (or detection) (i.e., in the case where a neighbor-cell D2DSS resource is configured in serving-cell SF#N).

[0209]For this operation, when the SRXCH_D2D RX UE receives a neighbor-cell D2DSS (linked to a preset or signaled neighbor-cell discover resource pool), the SRXCH_D2D RX UE may be configured to assume that not only i) a DL SF(s) overlapped in the time domain at least partially (i.e., partially or fully) with an area ranging from ‘SF#N-CEILING(w1)’ to ‘SF#N+CEILING(w1)’, but also ii) a DL SF(s) overlapped in the time domain at least partially (i.e., partially or fully) with one SF preceding or following the area ranging from ‘SF#N-CEILING(w1)’ to ‘SF#N+CEILING(w1)’ (i.e., an SF(s) for ensuring a time required for carrier (or frequency band) switching of a single Rx chain) is an INV_DL SF(S).

[0210]In othe...

example 1-2

[0223]According to Embodiment 1 of the present disclosure, if i) the difference between a preset or signaled neighbor-cell D2DSS resource offset and a preset or signaled neighbor-cell discovery resource pool offset or ii) the difference between ‘SF#N+CEILING(w1)+1’ (or ‘SF#N+CEILING(w1)’) for configuring an INV_DL SF(s) related to neighbor-cell D2DSS reception and ‘starting SF-CEILING(w1)−1’ of a neighbor-cell discovery pool (or ‘starting SF-CEILING(w1)’ of the neighbor-cell discovery pool) for configuring an INV_DL SF(s) related to neighbor-cell discovery signal reception, as described in Example 1-1, is smaller than a preset or signaled threshold, it may be configured that a DL SF(s) overlapped in the time domain at least partially (i.e., partially or fully) with an area between ‘SF#N+CEILING(w1)+1’ (or ‘SF#N+CEILING(w1)’) for configuring an INV_DL SF(s) related to neighbor-cell D2DSS reception and ‘starting SF-CEILING(w1)−1’ of a neighbor-cell discovery pool (or ‘starting SF-CEIL...

example 4-1

[0253]For example, if an interference measurement resource (IMR) related to calculation / derivation of (periodic / aperiodic) CSI reported at a specific time instant resides in an INV_DL SF, the SRXCH_D2D RX UE may be configured to assume that the IMR is not valid. It may be configured that a CSI report is transmitted / calculated (re)using an IMR included in a non-INV_DL SF closest to the INV_DL SF before the INV_DL SF, the CSI report is omitted, or CSI of a predefined specific value (e.g., out-of-range (OOR)) is reported.

[0254]For example, if a CSI reference resource related to calculation / derivation of (periodic / aperiodic) CSI reported at a specific time instant resides in an INV_DL SF, the SRXCH_D2D RX UE may be configured to assume that the CSI reference resource is not valid. It may be configured that the CSI report is transmitted / calculated (re)using / (re)assuming, as a CSI reference resource, a DL SF which is at once a non-INVL_DL_SF closest to the INV_DL SF (or the earliest non-I...

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PUM

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Abstract

The present invention relates to a method for a D2D terminal for receiving a D2D discovery signal comprising a plurality of radio frequency chains in a wireless communication system. Specifically, the method comprises the steps of: a D2D terminal receiving a pool configuration indicating resources for D2D discovery; and switching on-off state of a D2D receiver spare chain, wherein an interruption point corresponding to the on-off switching of the D2D receiver spare chain is determined in accordance with the size of a window linked to a resource for carrying out D2D discovery.

Description

TECHNICAL FIELD[0001]The present invention relates to a wireless communication system, and more particularly, to a method of transmitting / receiving a D2D signal in a wireless communication system and apparatus therefor.BACKGROUND ART[0002]A 3rd generation partnership project long term evolution (3GPP LTE) (hereinafter, referred to as ‘LTE’) communication system which is an example of a wireless communication system to which the present invention can be applied will be described in brief.[0003]FIG. 1 is a diagram illustrating a network structure of an evolved universal mobile telecommunications system (E-UMTS) which is an example of a wireless communication system. The E-UMTS is an evolved version of the conventional UMTS, and its basic standardization is in progress under the 3rd generation partnership project (3GPP). The E-UMTS may be referred to as a long term evolution (LTE) system. Details of the technical specifications of the UMTS and E-UMTS may be understood with reference to...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04W8/00H04W48/16H04W4/70H04W76/27H04W76/28H04W56/00H04L1/18H04L5/00H04W72/14H04W72/04H04L5/14
CPCH04W8/005H04W48/16H04W4/70H04W76/27H04W76/28H04W56/001H04L1/1812H04L5/0055H04W72/14H04W72/0453H04W72/0446H04L5/14H04W80/02H04W48/12H04W4/06H04L5/0053H04L5/0048Y02D30/70H04J11/00H04W72/23
Inventor LEESEO, HANBYUL
Owner LG ELECTRONICS INC
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