Method and apparatus for data transmission of device-to-device user equipment in wireless communication system

Patent metadata

Field	Value
Publication number	US-9712283-B2
Application number	US-201514835393-A
Country	US
Kind code	B2
Filing date	Aug 25, 2015
Priority date	Aug 26, 2014
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

According to an embodiment of the present invention, a method for transmitting Device-to-Device (D2D) data by a User Equipment (UE) in a wireless communication system, the method comprising: determining a bitmap to be applied to a subframe pool for data transmission from a subframe indicator bitmap; determining a set of subframes to transmit D2D data by using the bitmap to the subframe pool for data transmission; and transmitting D2D data in a subframe included in the determined subframe set, wherein a set of values available as k being the number of 1s in the subframe indicator bitmap are changed according to a Uplink/Downlink (UL/DL) configuration set to which a UL/DL configuration configured for the UE belongs.

First claim

What is claimed is:

1. A method for transmitting Device-to-Device (D2D) data by a User Equipment (UE) in a wireless communication system, the method comprising:
determining a bitmap to be applied to a subframe pool for data transmission from a subframe indicator bitmap;
determining a set of suframes to transmit the D2D data by using the bitmap to the subframe pool for data transmission; and
transmitting the D2D data in a subframe included in the determined subframe set,
wherein a set of values available as k being the number of 1s in the subframe indicator bitmap are determined according to a Uplink/Downlink (UL/DL) configuration set to which a UL/DL configuration configured for the UE belongs,
wherein the UL/DL configuration sets comprise UL/DL configuration 1 , 2 , 4 and 5 , UL/DL configuration 0 and UL/DL configurations 3 and 6 , and
wherein a value of 1 in the subframe indicator bitmap indicates the subframe used to transmit the D2D data.

2. The method according to claim 1 , wherein if the UL/DL configuration configured for the UE is one of UL/DL configurations 1 , 2 , 4 and 5 , the set of values available as k is {1, 2, 4, 8}.

3. The method according to claim 1 , wherein if the UL/DL configuration configured for the UE is UL/DL configuration 0 , the set of values available as k is {1, 2, 3, 4, 5, 6, 7}.

4. The method according to claim 1 , wherein if the UL/DL configuration configured for the UE is one of UL/DL configurations 3 and 6 , the set of values available as k is {1, 2, 3, 4, 5, 6}.

5. The method according to claim 1 , wherein the D2D data transmission is for transmission mode 1 .

6. The method according to claim 1 , wherein if the set of values available as k is {1, 2, 4, 8}, {1, 2, 3, 4, 5, 6, 7}, or {1, 2, 3, 4, 5, 6}, the size of the subframe indicator bitmap is 8, 7, or 6, respectively.

7. An apparatus of a User Equipment (UE) for transmitting Device-to-Device (D2D) data in a wireless communication system, the apparatus comprising:
a transmission module; and
a processor,
wherein the processor is configured to
determine a bitmap to be applied to a subframe pool for data transmission from a subframe indicator bitmap,
determine a set of suframes to transmit the D2D data by using the bitmap to the subframe pool for data transmission, and
transmit the D2D data in a subframe included in the determined subframe set,

wherein a set of values available as k being the number of 1s in the subframe indicator bitmap are determined according to a Uplink/Downlink (UL/DL) configuration set to which a UL/DL configuration configured for the UE belongs,
wherein the UL/DL configuration sets comprise UL/DL configuration 1 , 2 , 4 and 5 , UL/DL configuration 0 and UL/DL configurations 3 and 6 , and
wherein a value of 1 in the subframe indicator bitmap indicates the subframe used to transmit the D2D data.

8. The apparatus according to claim 7 , wherein if the UL/DL configuration configured for the UE is one of UL/DL configurations 1 , 2 , 4 and 5 , the set of values available as k is {1, 2, 4, 8}.

9. The apparatus according to claim 7 , wherein if the UL/DL configuration configured for the UE is UL/DL configuration 0 , the set of values available as k is {1, 2, 3, 4, 5, 6, 7}.

10. The apparatus according to claim 7 , wherein if the UL/DL configuration configured for the UE is one of UL/DL configurations 3 and 6 , the set of values available as k is {1, 2, 3, 4, 5, 6}.

11. The apparatus according to claim 7 , wherein the D2D data transmission is for transmission mode 1 .

12. The apparatus according to claim 7 , wherein if the set of values available as k is {1, 2, 4, 8}, {1, 2, 3, 4, 5, 6, 7}, or {1, 2, 3, 4, 5, 6}, the size of the subframe indicator bitmap is 8, 7, or 6, respectively.

Assignees

• Lg Electronics Inc

Inventors

• Chae Hyukjin
• Seo Hanbyul

Classifications

• H04W72/0446 Primary

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

• H04W72/23

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

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0053

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

• H04J1/02

  Details · CPC title