Universal reservation signal for medium sharing

• US 10,638,371 B2
• Filed: 04/24/2018
• Issued: 04/28/2020
• Est. Priority Date: 07/06/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoxia, Tian, Bin, Sun, Jing, Yoo, Taesang, Damnjanovic, Aleksandar, Kadous, Tamer, Wei, Yongbin, Sampath, Hemanth, Vermani, Sameer
• Primary Examiner(s): Lafontant, Gary
• Application Number:
  US15/960,883
• Publication Number:
  US 20190014507A1
• Time in Patent Office: 735 Days
• Field of Search: None
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26132 using repetition
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0816 with collision avoidance

Abstract

Wireless communications systems and methods related to signaling medium reservation information medium sharing among multiple radio technologies (RATs) are provided. A first wireless communication device communicates, with a second wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a spectrum. The spectrum is shared by multiple RATs. The reservation signal includes a plurality of first waveform sequences indicating medium reservation information detectable by the multiple RATs. The first wireless communication device and the second wireless communication device are associated with a first RAT of the multiple RATs. The first wireless communication device communicates, with the second wireless communication device using the first RAT, a communication signal in the spectrum during the TXOP.

Claims

1. A method of wireless communication, comprising:

communicating, by a first wireless communication device with a second wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a spectrum, wherein the spectrum is shared by multiple radio access technologies (RATs), wherein the reservation signal includes a first waveform sequence of a plurality of waveform sequences, each waveform sequence of the plurality of waveform sequences representing different medium reservation information identifiable by the multiple RATs, the first waveform sequence including a concatenation of repetitions of a second waveform sequence in consecutive time periods, wherein a phase change between each pair of adjacent second waveform sequences in adjacent time periods represents first medium reservation information, and wherein the first wireless communication device and the second wireless communication device are associated with a first RAT of the multiple RATs; and

communicating, by the first wireless communication device with the second wireless communication device using the first RAT, a communication signal in the spectrum during the TXOP.

2. The method of claim 1, wherein the first medium reservation information further includes at least one of a reservation duration for the TXOP or a RAT type indicating that the TXOP is reserved by the first RAT.

3. The method of claim 1, wherein the repetitions of the second waveform sequence are masked by a code representing the first medium reservation information.

4. The method of claim 1, wherein the reservation signal includes a plurality of third waveform sequences providing information for reception of the reservation signal.

5. The method of claim 1, wherein the communicating the reservation signal includes transmitting, by the first wireless communication device to the second wireless communication device, the reservation signal, and wherein the method further comprises selecting, by the first wireless communication device, the first waveform sequence from the plurality of waveform sequences to represent the first medium reservation information.

6. The method of claim 1, wherein the communicating the reservation signal includes receiving, by the first wireless communication device from the second wireless communication device, the reservation signal, and wherein the method further comprises identifying, by the first wireless communication device, the first waveform sequence based on a detection between the reservation signal and the plurality of waveform sequences.

7. The method of claim 1, wherein the communicating the reservation signal includes transmitting, by the first wireless communication device, the reservation signal based on a numerology of the first RAT.

8. The method of claim 1, wherein the communicating the reservation signal includes:

transmitting, by the first wireless communication device based on a numerology of the first RAT, a first signal indicating the first medium reservation information; and

transmitting, by the first wireless communication device based on a numerology of a second RAT of the multiple RATs, a second signal indicating the first medium reservation information.

9. The method of claim 1, further comprising:

receiving, by the first wireless communication device from a third wireless communication device, a reservation signal for another TXOP in the spectrum, the third wireless communication device associated with a second RAT of the multiple RATs;

determining, by the first wireless communication device, medium reservation information associated with the second RAT from the reservation signal for the another TXOP; and

refraining, by the first wireless communication device, from communicating in the spectrum during the another TXOP based on the medium reservation information associated with the second RAT, wherein the reservation signal for the another TXOP is transmitted using at least one of a numerology of the first RAT or the second RAT.

10. The method of claim 1, further comprising:

receiving, by the first wireless communication device from a third wireless communication device of the first RAT, a reservation signal for another TXOP in the spectrum;

determining, by the first wireless communication device, that the reservation signal for the another TXOP is transmitted by another wireless communication device of the first RAT; and

monitoring, by the first wireless communication device, for a first RAT-specific reservation signal in response to the determining.

11. The method of claim 1, further comprising communicating, by the first wireless communication device with the second wireless communication device, a filler signal in the spectrum during the TXOP based on at least one of a symbol boundary of the first RAT or a duration of the TXOP.

12. An apparatus comprising:

a transceiver configured to;

communicate, with a second wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a spectrum, wherein the spectrum is shared by multiple radio access technologies (RATs), wherein the reservation signal includes a first waveform sequence of a plurality of waveform sequences, each waveform sequence of the plurality of waveform sequences representing different medium reservation information identifiable by the multiple RATs, the first waveform sequence including a concatenation of repetitions of a second waveform sequence in consecutive time periods, wherein a phase change between each pair of adjacent second waveform sequences in adjacent time periods represents first medium reservation information, and wherein the apparatus and the second wireless communication device are associated with a first RAT of the multiple RATs; and

communicate, with the second wireless communication device using the first RAT, a communication signal in the spectrum during the TXOP.

13. The apparatus of claim 12, wherein the first medium reservation information further includes at least one of a reservation duration for the TXOP or a RAT type indicating that the TXOP is reserved by the first RAT.

14. The apparatus of claim 12, wherein the repetitions of the second waveform sequence are masked by a code representing the first medium reservation information.

15. The apparatus of claim 12, wherein the transceiver is further configured to communicate the reservation signal by transmitting, to the second wireless communication device, the reservation signal, and wherein the apparatus further comprises a processor configured to select the first waveform sequence from the plurality of waveform sequences to represent the first medium reservation information.

16. The apparatus of claim 12, wherein the transceiver is further configured to communicate the reservation signal by receiving, from the second wireless communication device, the reservation signal, and wherein the apparatus further comprises a processor configured to identify the first waveform sequence based on a detection between the reservation signal and the plurality of waveform sequences.

17. The apparatus of claim 12, wherein the transceiver is further configured to communicate the reservation signal by transmitting the reservation signal based on a numerology of the first RAT.

18. The apparatus of claim 12, wherein the transceiver is further configured to communicating the reservation signal by:

transmitting, based on a numerology of the first RAT, a first signal indicating the first medium reservation information; and

transmitting, based on a numerology of a second RAT of the multiple RATs, a second signal indicating the first medium reservation information.

19. The apparatus of claim 12, wherein the transceiver is further to communicate, with the second wireless communication device, a filler signal in the spectrum during the TXOP based on at least one of a symbol boundary of the first RAT or a duration of the TXOP.

20. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device to communicate, with a second wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a spectrum, wherein the spectrum is shared by multiple radio access technologies (RATs), wherein the reservation signal includes a first waveform sequence of a plurality of waveform sequences, each waveform sequence of the plurality of waveform sequences representing different medium reservation information identifiable by the multiple RATs, the first waveform sequence including a concatenation of repetitions of a second waveform sequence in consecutive time periods, wherein a phase change between each pair of adjacent second waveform sequences in adjacent time periods represents first medium reservation information, and wherein the first wireless communication device and the second wireless communication device are associated with a first RAT of the multiple RATs; and

code for causing the first wireless communication device to communicating, by the first wireless communication device with the second wireless communication device using the first RAT, a communication signal in the spectrum during the TXOP.

21. The non-transitory computer-readable medium of claim 20, wherein the first medium reservation information includes at least one of a reservation duration for the TXOP or a RAT type indicating that the TXOP is reserved by the first RAT.

22. The non-transitory computer-readable medium of claim 20, wherein the repetitions of the second waveform sequence are masked by a code representing the first medium reservation information.

23. The non-transitory computer-readable medium of claim 20, wherein the code for causing the first wireless communication device to communicate the reservation signal is further configured to transmit, to the second wireless communication device, the reservation signal, and wherein the program code further comprises code for causing the first wireless communication device to select the first waveform sequence from the plurality of waveform sequences to represent the first medium reservation information.

24. The non-transitory computer-readable medium of claim 20, wherein the code for causing the first wireless communication device to communicate the reservation signal is further configured to receive, from the second wireless communication device, the reservation signal, and wherein the program code further comprises code for causing the first wireless communication device to identify the first waveform sequence based on a detection between the reservation signal and the plurality of waveform sequences.

25. The non-transitory computer-readable medium of claim 20, wherein the code for causing the first wireless communication device to communicate the reservation signal is further configured to transmit the reservation signal based on a numerology of the first RAT.

26. The non-transitory computer-readable medium of claim 20, wherein the code for causing the first wireless communication device to communicate the reservation signal is further configured to:

transmit, based on a numerology of the first RAT, a first signal indicating the first medium reservation information; and

transmit, based on a numerology of a second RAT of the multiple RATs, a second signal indicating the first medium reservation information.

27. The non-transitory computer-readable medium of claim 20, further comprising code for causing the first wireless communication device to communicate, with the second wireless communication device, a filler signal in the spectrum during the TXOP based on at least one of a symbol boundary of the first RAT or a duration of the TXOP.