IP Library › Granted Patent US 8,638,652
Granted Patent B2
US 8,638,652 · App. 12/790,692 · Granted Jan 28, 2014

Signal transmission with fixed subcarrier spacing within OFDMA communication systems

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Quick Facts
Patent No.
US 8,638,652
App. No.
12/790,692
Granted
Jan 28, 2014
Kind
B2
Abstract

A station is disclosed that is configured for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The station includes a processor configured to fix a subcarrier spacing to a predetermined value for one or more subframes in all available bandwidths. The station further includes a transmitter configured to transmit a signal having the fixed subcarrier spacing, regardless of a frame structure of the one or more subframes. According to certain embodiments, the predetermined value may be divided evenly by at least one channel raster. The predetermined value may be 12.5 KHz, according to certain embodiments. Alternatively, the predetermined value is 6.25 KHz for one or more low mobility mobile stations, and/or the predetermined value is 25 KHz for one or more high mobility mobile stations. The station may be a mobile station or a base station configured for uplink and downlink transmission.

Claims (54)

1. A method for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system, comprising:

fixing a subcarrier spacing to a predetermined value for a plurality of subframes in a plurality of different bandwidths, wherein the predetermined value divides evenly at least one channel raster; and

transmitting wirelessly an electromagnetic signal having the fixed subcarrier spacing and no guard band between adjacent carriers, regardless of a frame structure of the one or more subframes.

2. The method of claim 1 , wherein a common value for the channel raster includes at least one of 100 kHz, 200 kHz, 250 kHz and 300 kHz.

3. The method of claim 1 , wherein the predetermined value is 12.5 KHz.

4. The method of claim 1 , wherein the predetermined value is 6.25 KHz for one or more low mobility mobile stations.

5. The method of claim 1 , wherein the predetermined value is 25 KHz for one or more high mobility mobile stations.

6. The method of claim 1 , wherein the frame structure is a Long Term Evolution (LTE)-Advanced frame structure.

7. The method of claim 6 , wherein the frame structure is a frequency division duplex (FDD) frame structure.

8. The method of claim 6 , wherein the frame structure is a time division duplex (TDD) frame structure.

9. The method of claim 1 , wherein the frame structure is an IEEE 802.16m frame structure.

10. The method of claim 9 , wherein the frame structure is an FDD frame structure.

11. The method of claim 9 , wherein the frame structure is a TDD frame structure.

12. The method of claim 1 , wherein the signal transmission is an uplink transmission.

13. The method of claim 1 , wherein the signal transmission is a downlink transmission.

14. The method of claim 1 , further comprising:

transmitting a subframe with a predetermined unit resource block size.

15. The method of claim 14 , wherein the predetermined unit resource block size is 16 subcarriers by 6 symbols.

16. The method of claim 14 , wherein the predetermined unit resource block size is 4 subcarriers by 6 symbols.

17. The method of claim 14 , wherein the predetermined unit resource supports multiple antenna transmission technologies.

18. A station configured for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system, comprising:

a processor configured to fix a subcarrier spacing to a predetermined value for a plurality of subframes in a plurality of different bandwidths, wherein the predetermined value divides evenly at least one channel raster; and

a transmitter configured to transmit a signal having the fixed subcarrier spacing and no guard band between adjacent carriers, regardless of a frame structure of the one or more subframes.

19. The station of claim 18 , wherein a common value for the channel raster includes at least one of 100 kHz, 200 kHz, 250 kHz and 300 kHz.

20. The station of claim 18 , wherein the predetermined value is 12.5 KHz.

21. The station of claim 18 , wherein the predetermined value is 6.25 KHz for one or more low mobility mobile stations.

22. The station of claim 18 , wherein the predetermined value is 25 KHz for one or more high mobility mobile stations.

23. The station of claim 18 , wherein the frame structure is a Long Term Evolution (LTE)-Advanced frame structure.

24. The station of claim 23 , wherein the frame structure is a time division duplex (TDD) frame structure.

25. The station of claim 18 , wherein the frame structure is a frequency division duplex (FDD) frame structure.

26. The station of claim 18 , wherein the frame structure is an IEEE 802.16m frame structure.

27. The station of claim 26 , wherein the frame structure is an FDD frame structure.

28. The station of claim 26 , wherein the frame structure is a TDD frame structure.

29. The station of claim 18 , wherein the signal transmission is an uplink transmission.

30. The station of claim 18 , wherein the signal transmission is a downlink transmission.

31. The station of claim 18 , wherein: the transmitter is configured to transmit a subframe with a predetermined unit resource block size.

32. The station of claim 31 , wherein the predetermined unit resource block size is 16 subcarriers by 6 symbols.

33. The station of claim 31 , wherein the predetermined unit resource block size is 4 subcarriers by 6 symbols.

34. The station of claim 31 , wherein the predetermined unit resource supports multiple antenna transmission technologies.

35. A non-transitory computer-readable medium storing executable instructions thereon for performing a method for signal transmission in an Orthogonal Frequency Division Multiple Access (OFDMA) system, the method comprising:

fixing a subcarrier spacing to a predetermined value for a plurality of subframes in a plurality of different bandwidths, wherein the predetermined value divides evenly at least one channel raster; and

transmitting wirelessly a signal having the fixed subcarrier spacing an no guard band between adjacent carriers, regardless of a frame structure of the one or more subframes.

36. The non-transitory computer-readable medium of claim 35 , wherein a common value for the channel raster includes at least one of 100 kHz, 200 kHz, 250 kHz and 300 kHz.

37. The non-transitory computer-readable medium of claim 35 , wherein the predetermined value is 12.5 KHz.

38. The non-transitory computer-readable medium of claim 35 , wherein the predetermined value is 6.25 KHz for one or more low mobility mobile stations.

39. The non-transitory computer-readable medium of claim 35 , wherein the predetermined value is 25 KHz for one or more high mobility mobile stations.

40. The non-transitory computer-readable medium of claim 35 , wherein the frame structure is a Long Term Evolution (LTE)-Advanced frame structure.

41. The non-transitory computer-readable medium of claim 40 , wherein the frame structure is a frequency division duplex (FDD) frame structure.

42. The non-transitory computer-readable medium of claim 40 , wherein the frame structure is a time division duplex (TDD) frame structure.

43. The non-transitory computer-readable medium of claim 35 , wherein the frame structure is an IEEE 802.16m frame structure.

44. The non-transitory computer-readable medium of claim 43 , wherein the frame structure is an FDD frame structure.

45. The non-transitory computer-readable medium of claim 43 , wherein the frame structure is a TDD frame structure.

46. The non-transitory computer-readable claim 35 , wherein the signal transmission is an uplink transmission.

47. The non-transitory computer-readable medium of claim 35 , wherein the signal transmission is a downlink transmission.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 11, 2024
From: ZTE (USA) INC.
To: ZTE CORPORATION
Reel/Frame 068283/0141 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 21, 2010
From: CAI, SEAN
To: ZTE (USA) INC.
Reel/Frame 025177/0089 →