WIRELESS COMMUNICATION BETWEEN WIDEBAND ENB AND NARROWBAND UE

• US 20180124789A1
• Filed: 06/27/2017
• Published: 05/03/2018
• Est. Priority Date: 11/02/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: YERRAMALLI, Srinivas, KADOUS, Tamer, LIU, Chih-Hao, PATEL, Chirag, RICO ALVARINO, Alberto
• Granted Patent: US 10,893,523 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 1/713 using frequency hopping
• CPC Class Codes: H04L 1/12 by using return channel
• CPC Class Codes: H04L 1/189 Transmission or retransmission of more than one copy of a message
• CPC Class Codes: H04L 5/00 Arrangements affording multiple use of the transmission path
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 4/70 Services for machine-to-machine communication [M2M] or machine type communication [MTC]
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• 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 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 88/02 Terminal devices
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method and apparatus for wireless communication in the unlicensed spectrum between an eNB and UEs having different bandwidths, e.g., between a narrowband UE and a wideband eNB. A base station apparatus may perform a dual CCA procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful. The apparatus may transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful and may refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful. In performing the dual CCA procedure, the apparatus may perform CCA for a first period of time then perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

Claims

1. A method of wireless communication at a base station, comprising:

performing a dual clear channel assessment (CCA) procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful;

transmitting during the frame when at least one CCA procedure of the dual CCA procedure is successful; and

refraining from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful.

2. The method of claim 1, wherein the first type of CCA procedure comprises CCA and the second type of CCA procedure comprises extended CCA (eCCA).

3. The method of claim 2, wherein performing the dual CCA procedure comprises:

performing CCA for a first period of time; and

performing eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

4. The method of claim 3, wherein the second period of time is longer than the first period of time.

5. The method of claim 3, further comprising:

transmitting a reservation signal when the CCA is successful; and

transmitting a frame transmission following the reservation signal.

6. The method of claim 3, further comprising:

transmitting a reservation signal when the eCCA is successful; and

transmitting a frame transmission following the reservation signal.

7. The method of claim 3, further comprising:

waiting until a next CCA location at a next frame boundary when the eCCA is unsuccessful; and

performing eCCA at the next CCA location.

8. The method of claim 3, wherein a first transmission time corresponding to the first type of CCA procedure is independent of a first duration of the first type CCA and a second transmission time corresponding to the second CCA procedure is based on a second duration of the second type CCA.

9. The method of claim 1, wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.

10. The method of claim 1, wherein the wireless communication comprises enhanced machine type communication (eMTC).

11. An apparatus for wireless communication at a base station comprising:

means for performing a dual clear channel assessment (CCA) procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful;

means for transmitting during the frame when at least one CCA procedure of the dual CCA procedure is successful; and

means for refraining from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful.

12. The apparatus of claim 11, wherein the first type of CCA procedure comprises CCA and the second type of CCA procedure comprises extended CCA (eCCA).

13. The apparatus of claim 12, wherein the means for performing the dual CCA procedure perform CCA for a first period of time and perform eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

14. The apparatus of claim 13, wherein the second period of time is longer than the first period of time.

15. The apparatus of claim 13, wherein the means for transmitting transmit transmitting a reservation signal when the CCA is successful and transmit a frame transmission following the reservation signal.

16. The apparatus of claim 13, wherein the means for transmitting transmit a reservation signal when the eCCA is successful and transmit a frame transmission following the reservation signal.

17. The apparatus of claim 13, wherein the means for refraining waits until a next CCA location at a next frame boundary when the eCCA is unsuccessful, and wherein the means for performing a dual CCA procedure perform eCCA at the next CCA location.

18. The apparatus of claim 13, wherein a first transmission time corresponding to the first type of CCA procedure is independent of a first duration of the first type CCA and a second transmission time corresponding to the second CCA procedure is based on a second duration of the second type CCA.

19. The apparatus of claim 11, wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.

20. The apparatus of claim 11, wherein the wireless communication comprises enhanced machine type communication (eMTC).

21. An apparatus for wireless communication at base station comprising:

a memory; and

at least one processor coupled to the memory and configured to;

perform a dual clear channel assessment (CCA) procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful;

transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful; and

refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful.

22. The apparatus of claim 21, wherein the first type of CCA procedure comprises CCA and the second type of CCA procedure comprises extended CCA (eCCA).

23. The apparatus of claim 22, wherein performing the dual CCA procedure comprises:

performing CCA for a first period of time; and

performing eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

24. The apparatus of claim 23, wherein the second period of time is longer than the first period of time.

25. The apparatus of claim 23, wherein the at least one processor is further configured to:

transmit a reservation signal when the CCA is successful; and

transmit a frame transmission following the reservation signal.

26. The apparatus of claim 23, wherein the at least one processor is further configured to:

transmit a reservation signal when the eCCA is successful; and

transmit a frame transmission following the reservation signal.

27. The apparatus of claim 23, wherein the at least one processor is further configured to:

wait until a next CCA location at a next frame boundary when the eCCA is unsuccessful; and

perform eCCA at the next CCA location.

28. The apparatus of claim 23, wherein a first transmission time corresponding to the first type of CCA procedure is independent of a first duration of the first type CCA and a second transmission time corresponding to the second CCA procedure is based on a second duration of the second type CCA.

29. The apparatus of claim 21, wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.

30. The apparatus of claim 21, wherein the wireless communication comprises enhanced machine type communication (eMTC).

31. A computer-readable medium storing computer executable code for wireless communication at base station, comprising code to:

perform a dual clear channel assessment (CCA) procedure for a frame, wherein the dual CCA procedure comprises a first type of CCA procedure followed by a second type of CCA procedure when the first type of CCA procedure is unsuccessful;

transmit during the frame when at least one CCA procedure of the dual CCA procedure is successful; and

refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful.

32. The computer-readable medium of claim 31, wherein the first type of CCA procedure comprises CCA and the second type of CCA procedure comprises extended CCA (eCCA).

33. The computer-readable medium of claim 32, wherein performing the dual CCA procedure comprises:

performing CCA for a first period of time; and

performing eCCA for a second period of time following the CCA, when the CCA is unsuccessful.

34. The computer-readable medium of claim 33, wherein the second period of time is longer than the first period of time.

35. The computer-readable medium of claim 33, further comprising code to:

transmit a reservation signal when the CCA is successful; and

transmit a frame transmission following the reservation signal.

36. The computer-readable medium of claim 33, further comprising code to:

transmit a reservation signal when the eCCA is successful; and

transmit a frame transmission following the reservation signal.

37. The computer-readable medium of claim 33, further comprising code to:

wait until a next CCA location at a next frame boundary when the eCCA is unsuccessful; and

perform eCCA at the next CCA location.

38. The computer-readable medium of claim 33, wherein a first transmission time corresponding to the first type of CCA procedure is independent of a first duration of the first type CCA and a second transmission time corresponding to the second CCA procedure is based on a second duration of the second type CCA.

39. The computer-readable medium of claim 31, wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.

40. The computer-readable medium of claim 31, wherein the wireless communication comprises enhanced machine type communication (eMTC).