Method and apparatus for transmitting signal in wireless communication system

• US 9,713,124 B2
• Filed: 07/14/2014
• Issued: 07/18/2017
• Est. Priority Date: 07/12/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Hanbyul, Chae, Hyukjin, Kim, Hakseong
• Primary Examiner(s): Lugo, David B
• Application Number:
  US14/904,413
• Publication Number:
  US 20160150504A1
• Time in Patent Office: 1,100 Days
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04L 5/0012 Hopping in multicarrier systems for frequency hopping in spread spectrum systems H04B1/713
• CPC Class Codes: H04L 5/0033 each allocating device acting autonomously, i.e. without negotiation with other allocating devices
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 72/04 Wireless resource allocation
• CPC Class Codes: H04W 76/11 Allocation or use of connection identifiers
• CPC Class Codes: H04W 76/14 Direct-mode setup

Abstract

One embodiment of the present invention relates to a method for transmitting a device-to-device (D2D) signal from a first user equipment in a wireless communication system, wherein the signal transmission method comprises the steps of: deciding a physical resource block through frequency-hopping; and mapping data onto the physical resource block that is decided, wherein a hopping offset value common to a first cell and a second cell is used for the frequency-hopping, when a second user equipment for receiving the signal belongs to the second cell, which is not the first cell to which the first user equipment belongs.

Claims

1. A method for transmitting a device-to-device (D2D) signal by a first terminal in a wireless communication system, the method comprising:

determining a physical resource block via frequency-hopping; and

mapping data to the determined physical resource block,

wherein a common hopping offset value common to a first cell including the terminal and a second cell different from the first cell is used for the frequency-hopping when a second terminal receiving the D2D signal belongs to the second cell.

2. The method according to claim 1, wherein the common hopping offset value is a D2D hopping offset different from a hopping offset of the first cell and a hopping offset of the second cell.

3. The method according to claim 1, wherein the common hopping offset value is a smaller of a hopping offset of the first cell and a hopping offset of the second cell.

4. The method according to claim 1, wherein the common hopping offset value is an average of a hopping offset of the first cell and a hopping offset of the second cell.

5. The method according to claim 1, wherein the frequency-hopping is subband-based frequency-hopping.

6. The method according to claim 5, wherein a pseudo-random sequence for determining a hopping function related to an amount of the frequency-hopping is initialized with a cell ID.

7. The method according to claim 6, wherein the cell ID is selected from a set of integers that does not include 0 to 509.

8. The method according to claim 6, wherein:

the cell ID corresponds to a first range when the first terminal is an in-network terminal; and

the cell ID is randomly selected from cell ID values corresponding to a second range when the second terminal is an out-of-network terminal.

9. The method according to claim 8, wherein at least the first range or the second range does not include a value between 0 and 509.

10. The method according to claim 6, wherein a value of the cell ID changes after a preset time.

11. The method according to claim 6, wherein the cell ID changes when a negative acknowledgment (NACK) is received at least a preset number of times.

12. The method according to claim 1, wherein the common hopping offset value is a preset value, a value delivered via a physical layer signal, a value delivered via a higher layer signal or a value delivered via a paging signal when the first terminal is in an RRC (Radio Resource Control) idle state.

13. The method according to claim 1, wherein identical hopping bandwidths are configured in the first cell and the second cell.

14. A first terminal for transmitting a device-to-device (D2D) signal in a wireless communication system, the first terminal comprising:

a transmission device configured to transmit data; and

a processor

configured to determine a physical resource block via frequency-hopping and map data to the determined physical resource block for data transmission via the transmission device,

wherein a common hopping offset value common to a first cell including the terminal and a second cell different from the first cell is used for the frequency-hopping when a second terminal receiving the D2D signal belongs to the second cell.