IP Library › Granted Patent US 11,671,213

Granted Patent B2

US 11,671,213 · App. 15/598,932 · Granted Jun 6, 2023

Method and apparatus for transmission and reception in wireless communication system supporting scalable frame structure

Inventors: Youngbum Kim (Seoul, KR); Younsun Kim (Gyeonggi-do, KR); Yongjun Kwak (Gyeonggi-do, KR)

H04L5/0007 H04J11/0093 H04L1/1829 H04L5/0064 H04L5/1469 H04L27/2602 H04L27/2607 H04L27/26025 H04L5/0048

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Quick Facts

Patent No.: US 11,671,213
App. No.: 15/598,932
Granted: Jun 6, 2023
Kind: B2

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Abstract

An apparatus and method are provided for transmitting and receiving signals in a wireless communication system. A method includes transmitting a first signal using a first frame structure to a first terminal; and transmitting a second signal using a second frame structure to a second terminal. A subcarrier spacing of the second frame structure is a multiple of a subcarrier spacing of the first frame structure. A length of a subframe in the first frame structure is a multiple of a length of a subframe in the second frame structure.

Claims (114)

1. A method for transmitting signals in a wireless communication system, the method comprising:

transmitting, to a terminal, information indicating a frame structure among a plurality of frame structures including a first frame structure and a second frame structure; and

transmitting, to the terminal, a signal using the indicated frame structure,

wherein a subcarrier spacing of the second frame structure is twice as wide as a subcarrier spacing of the first frame structure, and a duration of a first transmission time interval (TTI) of the first frame structure is twice as long as a duration of a second TTI of the second frame structure,

wherein the first TTI and the second TTI each include 14 symbols and the duration of the first TTI is 1 ms and the duration of the second TTI is 0.5 ms,

wherein the subcarrier spacing of the first frame structure is 15 kHz and the subcarrier spacing of the second frame structure is 30 kHz,

wherein each of a symbol duration of a first symbol and a symbol duration of an eighth symbol in the first TTI is longer than a symbol duration of any of other 12 symbols in the first TTI, and a symbol duration of a first symbol in the second TTI is longer than a symbol duration of any of other 13 symbols in the second TTI,

wherein the symbol duration of the first symbol in the first TTI equals a sum of the symbol duration of the first symbol and a symbol duration of a second symbol in the second TTI, and two symbols in the second TTI are time synchronized with one symbol of the first TTI,

wherein a duration of a cyclic prefix of the first symbol in the second TTI is T CP,0 /2+(T CP,0 −T CP,1 )/2 and a duration of an orthogonal frequency division multiplexing (OFDM) symbol of the first symbol in the second TTI is T symb /2,

wherein T symb is a duration of an OFDM symbol in the first TTL T CP,0 is a duration of a cyclic prefix of the first symbol in the first TTI, and T CP,1 is a duration of a cyclic prefix of a second symbol in the first TTI, and

wherein a duration of a cyclic prefix of the second symbol in the second TTI is T CP,1 /2 and a duration of an OFDM symbol of the second symbol in the second TTI is T symb /2.

2. A method for receiving signals in a wireless communication system, the method comprising:

receiving, from a base station, information indicating a frame structure among a plurality of frame structures including a first frame structure and a second frame structure; and

receiving, from the base station, a signal using the indicated frame structure,

wherein the first TTI and the second TTI each include 14 symbols and the duration of the first TTI is 1 ms and the duration of the second TTI is 0.5 ms,

wherein the subcarrier spacing of the first frame structure is 15 kHz and the subcarrier spacing of the second frame structure is 30 kHz,

wherein a duration of a cyclic prefix of the second symbol in the second TTI is T CP,1 /2 and a duration of an OFDM symbol of the second symbol in the second TTI is T symb /2.

3. A base station for transmitting signals in a wireless communication system, the base station comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

transmit, to a terminal, via the transceiver, information indicating a frame structure among a plurality of frame structures including a first frame structure and a second frame structure, and

transmit, to the terminal, via the transceiver, a signal using the indicated frame structure,

wherein the first TTI and the second TTI each include 14 symbols and the duration of the first TTI is 1 ms and the duration of the second TTI is 0.5 ms,

wherein the subcarrier spacing of the first frame structure is 15 kHz and the subcarrier spacing of the second frame structure is 30 kHz,

wherein T symb is a duration of an OFDM symbol in the first TTI, T CP,0 is a duration of a cyclic prefix of the first symbol in the first TTI, and T CP,1 is a duration of a cyclic prefix of a second symbol in the first TTI, and

wherein a duration of a cyclic prefix of the second symbol in the second TTI is T CP,1 /2 and a duration of an OFDM symbol of the second symbol in the second ITT is T symb /2.

4. A terminal for receiving signals in a wireless communication system, the terminal comprising:

a transceiver; and

a controller coupled with the transceiver and configured to:

receive, from a base station, via the transceiver, information indicating a frame structure among a plurality of frame structures including a first frame structure and a second frame structure, and

receive, from the base station, via the transceiver, a signal using the indicated frame structure,

wherein the first TTI and the second TTI each include 14 symbols and the duration of the first TTI is 1 ms and the duration of the second TTI is 0.5 ms,

wherein the subcarrier spacing of the first frame structure is 15 kHz and the subcarrier spacing of the second frame structure is 30 kHz,

wherein a duration of a cyclic prefix of the second symbol in the second TTI is T CP,1 /2 and a duration of an OFDM symbol of the second symbol in the second TTI is T symb /2.

5. The terminal of claim 4 , wherein the plurality of frame structures further include a third frame structure,

wherein a subcarrier spacing of the third frame structure is twice as wide as the subcarrier spacing of the second frame structure, and the duration of the second TTI of the second frame structure is twice as long as a duration of a third TTI of the third frame structure,

wherein the third TTI includes 14 symbols and the duration of the third TTI is 0.25 ms,

wherein a symbol duration of a first symbol in an even-numbered third TTI is longer than a symbol duration of any of other symbols in the third TTI, and

wherein the symbol duration of the first symbol in the first TTI equals a sum of the symbol duration of the first symbol, a symbol duration of a second symbol, a symbol duration of a third symbol, and a symbol duration of a fourth symbol in the even-numbered third TTI, and four symbols in the third TTI are time synchronized with one symbol of the first TTI.

6. The terminal of claim 5 , wherein a duration of a cyclic prefix of the first symbol in the even-numbered third TTI is T CP,0 /4+3·(T CP,0 −T CP,1 )/4 and a duration of an OFDM symbol of the first symbol in the even-numbered third ITT is T symb /4,

and

wherein a duration of a cyclic prefix of the second symbol in the even-numbered third TTI tis T CP,1 /4 and a duration of an OFDM symbol of the second symbol in the even-numbered third TTI is T symb /4.

7. The terminal of claim 5 , wherein the subcarrier spacing of the third frame structure is 60 kHz,

wherein the symbol duration of the first symbol in the even-numbered third TTI is 18.36 μsec and the symbol duration of any of other symbols in the third TTI is 17.84 μsec, and

wherein a duration of a cyclic prefix of the first symbol in the even-numbered third TTI is 1.69 μsec and a duration of an OFDM symbol of the first symbol in the even-numbered third TTI is 16.67 μsec.

8. The terminal of claim 4 , wherein the symbol duration of the first symbol in the second ITT is 36.20 μsec usec and the symbol duration of any of the other 13 symbols in the second TTI is 35.68 μsec, and

wherein the duration of the cyclic prefix of the first symbol in the second TTI is 2.87 μsec and the duration of the OFDM symbol of the first symbol in the second TTI is 33.33 μsec.

9. The terminal of claim 4 , wherein the controller is further configured to receive information on a subcarrier spacing and a duration of a cyclic prefix of the indicated frame structure.

10. The method of claim 1 , wherein the plurality of frame structures further include a third frame structure,

wherein the third TTI includes 14 symbols and the duration of the third TTI is 0.25 ms,

wherein a symbol duration of a first symbol in an even-numbered third TTI is longer than a symbol duration of any of other symbols in the third TTI, and

11. The method of claim 10 , wherein a duration of a cyclic prefix of the first symbol in the even-numbered third TTI is T CP,0 /4+3·(T CP,0 −T CP,1 )/4 and a duration of an OFDM symbol of the first symbol in the even-numbered third TTI is T symb /4,

and

wherein a duration of a cyclic prefix of the second symbol in the even-numbered third TTI is T CP,1 /4 and a duration of an OFDM symbol of the second symbol in the even-numbered third TTI is T symb /4.

12. The method of claim 10 , wherein the subcarrier spacing of the third frame structure is 60 kHz,

wherein the symbol duration of the first symbol in the even-numbered third TTI is 18.36 μsec and the symbol duration of any of other symbols in the third TTI is 17.84 μsec, and

13. The method of claim 1 , wherein the symbol duration of the first symbol in the second TTI is 36.20 μsec and the symbol duration of any of the other 13 symbols in the second TTI is 35.68 μsec, and

wherein the duration of the cyclic prefix of the first symbol in the second TTI is 2.87 μsec and the duration of the OFDM symbol of the first symbol in the second TTI is 33.33 μsec.

14. The method of claim 1 , further comprising transmitting information on a subcarrier spacing and a duration of a cyclic prefix of the indicated frame structure.

15. The method of claim 2 , wherein the plurality of frame structures further includes a third frame structure,

wherein the third TTI includes 14 symbols and the duration of the third TTI is 0.25 ms,

wherein a symbol duration of a first symbol in an even-numbered third TTI is longer than a symbol duration of any of other symbols in the third TTI, and

16. The method of claim 15 , wherein a duration of a cyclic prefix of the first symbol in the even-numbered third TTI is T CP,0 /4+3·(T CP,0 −T CP,1 )/4 and a duration of an OFDM symbol of the first symbol in the even-numbered third TTI is T symb /4,

and

17. The method of claim 15 , wherein the subcarrier spacing of the third frame structure is 60 kHz,

wherein the symbol duration of the first symbol in the even-numbered third TTI is 18.36 μsec and the symbol duration of any of other symbols in the third TTI is 17.84 μsec, and

18. The method of claim 2 , wherein the symbol duration of the first symbol in the second TTI is 36.20 μsec and the symbol duration of any of the other 13 symbols in the second TTI is 35.68 μsec, and

wherein the duration of the cyclic prefix of the first symbol in the second TTI is 2.87 μsec and the duration of the OFDM symbol of the first symbol in the second TTI is 33.33 μsec.

19. The method of claim 2 , further comprising receiving information on a subcarrier spacing and a duration of a cyclic prefix of the indicated frame structure.

20. The base station of claim 3 , wherein the plurality of frame structures further includes a third frame structure,

wherein the third TTI includes 14 symbols and the duration of the third TTI is 0.25 ms,

wherein a symbol duration of a first symbol in an even-numbered third TTI is longer than a symbol duration of any of other symbols in the third TTI, and

21. The base station of claim 20 , wherein a duration of a cyclic prefix of the first symbol in the even-numbered third TTI is T CP,0 /4+3·(T CP,0 −T CP,1 )/4 and a duration of an OFDM symbol of the first symbol in the even-numbered third TTI is T symb /4,

and

22. The base station of claim 20 , wherein the subcarrier spacing of the third frame structure is 60 kHz,

wherein the symbol duration of the first symbol in the even-numbered third TTI is 18.36 μsec and the symbol duration of any of other symbols in the third TTI is 17.84 μsec, and

23. The base station of claim 3 , wherein the symbol duration of the first symbol in the second TTI is 36.20 μsec and the symbol duration of any of the other 13 symbols in the second TTI is 35.68 μsec, and

wherein the duration of the cyclic prefix of the first symbol in the second TTI is 2.87 μsec and the duration of the OFDM symbol of the first symbol in the second TTI is 33.33 μsec.

24. The base station of claim 3 , wherein the controller is further configured to transmit information on a subcarrier spacing and a duration of a cyclic prefix of the indicated frame structure.

25. The method of claim 1 , further comprising:

transmitting, to the terminal, scheduling information based on a TTI, as a unit of scheduling, of the indicated frame structure,

wherein the signal is transmitted based on the TTI of the indicated frame structure.

26. The method of claim 2 , further comprising:

receiving, from the base station, scheduling information based on a TTI, as a unit of scheduling, of the indicated frame structure,

wherein the signal is received based on the TTI of the indicated frame structure.

27. The base station of claim 3 , wherein the controller is further configured to transmit, to the terminal, via the transceiver, scheduling information based on a TTI, as a unit of scheduling, of the indicated frame structure, and

wherein the signal is transmitted based on the TTI of the indicated frame structure.

28. The terminal of claim 4 , wherein the controller is further configured to receive, from the base station, via the transceiver, scheduling information based on a TTI, as a unit of scheduling, of the indicated frame structure, and

wherein the signal is received based on the TTI of the indicated frame structure.

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 1, 2017

From: KIM, YOUNGBUM; KIM, YOUNSUN; KWAK, YOUNGJUN

To: SAMSUNG ELECTRONICS CO., LTD.

Reel/Frame 042562/0862 →

Priority Claims (1)

KR 10-2016-0061495 · May 19, 2016 · national

Continuity (1)

Related Publication 20170338920A1 · Nov 23, 2017