Method and apparatus for transmitting discovery signal for device-to-device direct communication in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016014774-A1
Application number	US-201414771107-A
Country	US
Kind code	A1
Filing date	Apr 2, 2014
Priority date	Apr 2, 2013
Publication date	Jan 14, 2016
Grant date	—

Abstract

Disclosed is a method for performing, by a device, device-to-device direct communication in a wireless communication system. In particular, the method comprises the steps of: transmitting a device-to-device direct communication signal via a first resource block having a resource structure for device-to-device direct communication at a first point in time; and transmitting the device-to-device direct communication signal via a second resource block having a resource structure for the device-to-device direct communication at a second point in time, wherein the first resource block and the second resource block are defined by a time unit index and a resource unit index, respectively, and wherein the time unit index of the second resource block is determined on the basis of the resource unit index of the first resource block index, and the resource unit index of the second resource block is determined on the basis of the time unit index of the first resource block index.

First claim

1 . A method of performing device-to-device (D2D) communication at a user equipment (UE) in a wireless communication system, the method comprising:
transmitting a D2D signal via a first resource block of a resource structure for D2D communication at a first timing; and transmitting the D2D signal via a second resource block of the resource structure for D2D communication at a second timing, wherein each of the first resource block and the second resource block is defined by a time unit index and a resource unit index, wherein the time unit index of the second resource block is determined based on the resource unit index of the first resource block index, and wherein the resource unit index of the second resource block is determined based on the time unit index of the first resource block index.

2 . The method according to claim 1 , wherein:
the indices of the first resource block and the second resource block are defined by [time unit index, resource unit index], and when the index of the first resource block is [x, y], the index of the second resource block is [y, x].

3 . The method according to claim 1 , wherein:
the indices of the first resource block and the second resource block are defined by [time unit index, resource unit index], and when the index of the first resource block is [x, y], the time unit index of the second resource block is defined by (y+a) mod number of time units (a being an integer equal to or greater than 0) and the resource unit index of the second resource block is defined by (x+b) mod number of resource units (b being an integer equal to or greater than 0).

4 . The method according to claim 1 , wherein the transmitting the D2D signal via the first resource block includes:
assigning indices of UEs participating in D2D communication to resource blocks included in the resource structure for D2D communication at the first timing using a resource unit-first method; and setting a resource block corresponding to an index of the UE among the resource blocks as the first resource block.

5 . The method according to claim 4 , wherein the transmitting the D2D signal via the second resource block includes:
reading indices of UEs participating in D2D communication at the first timing using a resource unit-first method and assigning the indices of the UEs to resource blocks included in the resource structure for D2D communication at the second timing using a time unit-first method; and setting a resource block corresponding to an index of the UE among the resource blocks as the second resource block.

6 . A user equipment (UE) for performing device-to-device (D2D) communication in a wireless communication system, the UE comprising:
a wireless communication module configured to transmit and receive a signal to and from a base station or a counterpart UE apparatus of D2D communication; and a processor configured to process the signal, wherein the processor controls the wireless communication module to transmit a D2D signal via a first resource block of a resource structure for D2D communication at a first timing and to transmit the D2D signal via a second resource block of the resource structure for D2D communication at a second timing, and wherein each of the first resource block and the second resource block is defined by a time unit index and a resource unit index, the time unit index of the second resource block is determined based on the resource unit index of the first resource block index, and the resource unit index of the second resource block is determined based on the time unit index of the first resource block index.

7 . The UE according to claim 6 , wherein:
the indices of the first resource block and the second resource block are defined by [time unit index, resource unit index], and when the index of the first resource block is [x, y], the index of the second resource block is [y, x].

8 . The UE according to claim 6 , wherein:
the indices of the first resource block and the second resource block are defined by [time unit index, resource unit index], and when the index of the first resource block is [x, y], the time unit index of the second resource block is defined by (y+a) mod number of time units (a being an integer equal to or greater than 0) and the resource unit index of the second resource block is defined by (x+b) mod number of resource units (b being an integer equal to or greater than 0).

9 . The UE according to claim 6 , wherein the processor assigns indices of UEs participating in D2D communication to resource blocks included in the resource structure for D2D communication at the first timing using a resource unit-first method and sets a resource block corresponding to an index of the UE among the resource blocks as the first resource block.

10 . The UE according to claim 9 , wherein the processor reads indices of UEs participating in D2D communication at the first timing using a resource unit-first method, assigns the indices of the UEs to resource blocks included in the resource structure for D2D communication at the second timing using a time unit-first method, and sets a resource block corresponding to an index of the UE among the resource blocks as the second resource block.

Assignees

• Lg Electronics Inc

Inventors

• Seo Hanbyul

Classifications

• H04L5/0037 Primary

  Inter-user or inter-terminal allocation · CPC title

• H04L5/0044

  Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH · CPC title

• H04W76/14

  Direct-mode setup · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/0446 Primary

  Resources in time domain, e.g. slots or frames · CPC title