SCHEME FOR D2D COMMUNICATION USING PRIORITY

• US 20140321377A1
• Filed: 04/30/2014
• Published: 10/30/2014
• Est. Priority Date: 04/30/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: RYU, Hyun-Seok, PARK, Seung-Hoon, LIM, Chi-Woo
• Granted Patent: US 9,578,651 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 72/566 of the information or information source or recipient
• CPC Class Codes: H04W 76/40 for selective distribution or broadcast

Abstract

A communication method of a device to device (D2D) user equipment (UE) in a cellular system supporting a communication frame structure including one or more subframes used for a communication of the D2D UE is provided. The method includes reading an alarm region located within a first subframe, wherein the alarm region indicates whether a communication signal having a priority is included in the first subframe or a second subframe related to the first subframe, and transmitting the communication signal through one of the second subframe and a third subframe related to the second subframe, based on information read from the alarm region.

Claims

1. A communication method of a device to device (D2D) user equipment (UE) in a cellular system supporting a communication frame structure including one or more subframes used for a communication of the D2D UE, the method comprising:

reading an alarm region located within a first subframe, wherein the alarm region indicates whether a communication signal having a priority is included in the first subframe or a second subframe related to the first subframe; and

transmitting the communication signal through one of the second subframe and a third subframe related to the second subframe based on information read from the alarm region.

2. The method of claim 1, wherein the alarm region is divided and allocated according to one or more priorities.

3. The method of claim 2, wherein, with respect to the divided alarm regions, a larger number of alarm regions are allocated to a first priority than to a second priority,

wherein the first priority comprises a higher priority than the second priority.

4. The method of claim 2, wherein the transmitting of the communication signal comprises:

marking an alarm region allocated to a priority of the UE; and

transmitting the communication signal in a transport resource associated with the marked alarm region.

5. The method of claim 4, wherein the reading of the alarm region further comprises checking energy levels of entire alarm regions.

6. The method of claim 5, wherein the marking of the alarm region comprises:

sorting alarm regions allocated to the priority of the UE in a descending order of the checked energy levels; and

marking an alarm region having an energy level equal to or lower than a threshold.

7. The method of claim 6, wherein the threshold comprises a percentage.

8. The method of claim 1, wherein the reading of the alarm region comprises detecting whether sequences designated to one or more priorities are marked on the alarm regions.

9. The method of claim 8, wherein the transmitting of the communication signal comprises:

when there is no detected sequence, or when priorities designated to one or more detected sequences are not higher than a priority of the UE, marking a sequence designated to the priority of the UE on one or more of the alarm regions and transmitting the communication signal in a transport resource associated with the marked alarm region.

10. The method of claim 1, further comprising:

before the reading of the alarm region, obtaining information indicating a position of the first subframe by reading a system information block (SIB) included within a communication frame.

11. The method of claim 1, wherein the alarm region is located at one of a first symbol, a first symbol except for a physical downlink control channel (PDCCH), and a last symbol, of the first subframe.

12. An user equipment (UE) performing a communication in a cellular system supporting a communication frame structure including one or more subframes used for the communication of a device to device (D2D) UE, the UE comprising:

a transceiver configured to transmit and receive a communication frame; and

a controller configured to read an alarm region located within a first subframe, the alarm region indicating whether a communication signal having a predetermined priority is included in the first subframe or a second subframe related to the first subframe, and to control to transmit the communication signal through one of the second subframe and a third subframe related to the second subframe based on information read from the alarm region.

13. The UE of claim 12, wherein the alarm region is divided and allocated according to one or more priorities.

14. The UE of claim 13, wherein, with respect to the divided alarm regions, a larger number of alarm regions are allocated to a first priority than to a second priority,

wherein the first priority comprises a higher priority than the second priority.

15. The UE of claim 13, wherein the controller is further configured to mark an alarm region allocated to a priority of the UE, and to control to transmit the communication signal in a transport resource associated with the marked alarm region.

16. The UE of claim 15, wherein the controller is further configured to check energy levels of entire alarm regions.

17. The UE of claim 16, wherein the controller is further configured to sort alarm regions allocated to the priority of the UE in a descending order of the checked energy levels and mark an alarm region having an energy level equal to or lower than a threshold.

18. The UE of claim 17, wherein the threshold comprises a percentage.

19. The UE of claim 12, wherein the controller is further configured to detect whether sequences designated to one or more priorities are marked on the alarm regions.

20. The UE of claim 19, wherein, when there is no detected sequence, or when priorities designated to one or more detected sequences are not higher than the priority of the UE, the controller is further configured to mark a sequence designated to a priority of the UE on one or more of the alarm regions and to transmit the communication signal in a transport resource associated with the marked alarm region.

21. The UE of claim 12, wherein the controller is further configured to obtain information indicating a position of the first subframe by reading a system information block (SIB) included within a communication frame before reading the alarm region.

22. The UE of claim 12, wherein the alarm region is located at one of a first symbol, a first symbol except for a physical downlink control channel (PDCCH), and a last symbol, of the first subframe.