METHOD FOR TRANSMITTING SIGNAL IN COMMUNICATION SYSTEM

• US 20150009954A1
• Filed: 07/07/2014
• Published: 01/08/2015
• Est. Priority Date: 07/05/2013
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: CHANG, Kap Seok, KWAK, Byung Jae, LEE, Moon Sik
• Granted Patent: US 9,860,102 B2
• Time in Patent Office: Days
• US Class Current: 370/330
• CPC Class Codes: H04L 27/2607 Cyclic extensions
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04L 27/2692 with preamble design, i.e. with negotiation of the synchronisation sequence with transmitter or sequence linked to the algorithm used at the receiver
• CPC Class Codes: H04W 72/02 Selection of wireless resources by user or terminal
• CPC Class Codes: H04W 74/0858 collision detection

Abstract

Disclosed is a method for transmitting signal in a communication system. A method for transmitting signal comprises generating a short training field (STF) comprising a cyclic prefix (CP) and an effective symbol period including four RP regions; generating a long training field (LTF) comprising a cyclic prefix (CP) and an effective symbol period including two RP regions; generating a frame comprising the STF and the LTF; and transmitting the frame. Thus, efficiency of the communication system may be enhanced by using the method.

Claims

1. A method for transmitting signal, performed in a terminal, the method comprising:

generating a short training field (STF) comprising a cyclic prefix (CP) and an effective symbol period including four repetition pattern (RP) regions;

generating a long training field (LTF) comprising a cyclic prefix (CP) and an effective symbol period including two RP regions;

generating a frame comprising the STF and the LTF; and

transmitting the frame.

2. The method of claim 1, wherein a polarity of a RP region among the four RP regions of the STF is configured according to a transmission mode of the frame.

3. The method of claim 1, wherein a polarity of a last RP region among the four RP regions of the STF is configured to be opposite to that of a previous RP region in order to indicate an end of the STF.

4. The method of claim 1, wherein sequence elements are allocated to odd-numbered subcarriers or even-numbered subcarriers of each RP region of the STF.

5. The method of claim 4, wherein base sequence elements and modified sequence elements generated based on the base sequence elements are alternately allocated to the odd-numbered subcarriers or the even-numbered subcarriers.

6. The method of claim 4, wherein base sequence elements are allocated to odd-numbered subcarrier or even-numbered subcarriers in an upper frequency band of each RP region, and modified sequence elements generated based on the base sequence elements are allocated to odd-numbered subcarrier or even-numbered subcarriers in a lower frequency band of each RP region.

7. The method of claim 1, wherein a polarity of a RP region among the two RP regions of the LTF is configured according to a transmission mode of the frame

8. The method of claim 1, wherein base sequence elements are allocated to odd-numbered subcarriers of each RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to even-numbered subcarriers of each RP region of the LTF.

9. The method of claim 1, wherein base sequence elements are allocated to subcarriers in an upper frequency band of each RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to subcarriers in a lower frequency band of each RP region of the LTF.

10. A method for transmitting signal, performed in a terminal, the method comprising:

generating a short training field (STF) comprising a cyclic prefix (CP) and an effective symbol period including four RP regions;

generating a long training field (LTF) comprising a cyclic prefix (CP) and an effective symbol period including a RP region;

generating a frame comprising the STF and the LTF; and

transmitting the frame.

11. The method of claim 10, wherein a polarity of a RP region among the four RP regions of the STF is configured according to a transmission mode of the frame.

12. The method of claim 10, wherein sequence elements are allocated to odd-numbered subcarriers or even-numbered subcarriers of each RP region of the STF.

13. The method of claim 10, wherein base sequence elements are allocated to odd-numbered subcarriers of each RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to even-numbered subcarriers of each RP region of the LTF.

14. The method of claim 10, wherein base sequence elements are allocated to subcarriers in an upper frequency band of each RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to subcarriers in a lower frequency band of each RP region of the LTF.

15. A method for transmitting signal, performed in a terminal, the method comprising:

generating a short training field (STF) comprising a cyclic prefix (CP) and an effective symbol period including four RP regions;

generating a long training field (LTF) comprising a cyclic prefix (CP) and an effective symbol period including a RP region;

generating a collision detection field (CDF) comprising a cyclic prefix (CP) and an effective symbol period including information indicating the terminal;

generating a frame including the STF, the LTF, and the CDF; and

transmitting the frame.

16. The method of claim 15, wherein sequence elements are allocated to odd-numbered subcarriers or even-numbered subcarriers of each RP region of the STF.

17. The method of claim 15, wherein base sequence elements are allocated to odd-numbered subcarriers of the RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to even-numbered subcarriers of the RP region of the LTF.

18. The method of claim 15, wherein base sequence elements are allocated to subcarriers in an upper frequency band of the RP region of the LTF, and modified sequence elements generated based on the base sequence elements are allocated to subcarriers in a lower frequency band of the RP region of the LTF.

19. The method of claim 15, wherein the information indicating the terminal is allocated to a subcarrier of the effective symbol period of the LTF preconfigured for the terminal.

20. The method of claim 19, wherein the information indicating the terminal is configured with a busy tone signal of a physical layer.