Co-existence-aware communication in shared spectrum

Patent metadata

Field	Value
Publication number	US-9806836-B2
Application number	US-201514711384-A
Country	US
Kind code	B2
Filing date	May 13, 2015
Priority date	May 13, 2015
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Techniques for co-existence between wireless Radio Access Technologies (RATs) and related operations in shared spectrum are disclosed. Operation on a communication medium shared between RATs may be managed by a transceiver configured to operate in accordance with a first RAT and to monitor the medium for signaling associated with a second RAT. A medium analyzer may be configured to determine one or more Time Division Multiplexing (TDM) parameters of a TDM communication pattern associated with the second RAT based on the monitored signaling. A transmission controller may be configured to set one or more transmission parameters for the first RAT based on the determined one or more TDM parameters. The transceiver may be further configured to transmit on the medium in accordance with the one or more transmission parameters.

First claim

What is claimed is:

1. An apparatus for managing operation on a communication medium shared between Radio Access Technologies (RATs), comprising:
a transceiver configured to operate in accordance with a first RAT and to monitor the medium for signaling associated with a second RAT;
a medium analyzer configured to determine one or more Time Division Multiplexing (TDM) parameters of a TDM communication pattern associated with the second RAT based on the monitored signaling, the TDM communication pattern defining activated periods and deactivated periods of communication over the medium in accordance with the second RAT; and
a transmission controller configured to set one or more transmission parameters for the first RAT based on the determined one or more TDM parameters,
wherein the transceiver is further configured to transmit on the medium in accordance with the one or more transmission parameters.

2. The apparatus of claim 1 , wherein the one or more TDM parameters include a parameter related to a periodicity of the TDM communication pattern, a parameter related to a duty cycle of the activated periods of the TDM communication pattern, or a combination thereof.

3. The apparatus of claim 1 , wherein the one or more TDM parameters include a parameter related to a puncturing pattern within a given activated period of the TDM communication pattern.

4. The apparatus of claim 1 , wherein the transceiver is configured to monitor the medium for non-first-RAT signaling energy and to compare the monitored non-first-RAT signaling energy with a known waveform signature corresponding to the second RAT to associate the signaling with the second RAT.

5. The apparatus of claim 1 , wherein the transceiver is configured to monitor the medium for non-first-RAT signaling energy and to correlate the monitored non-first-RAT signaling energy with a channel reservation message defined for the first RAT to associate the signaling with the second RAT.

6. The apparatus of claim 5 , wherein the medium analyzer is configured to determine a duty cycle TDM parameter based on a duration field of the channel reservation message.

7. The apparatus of claim 1 , wherein the one or more transmission parameters include a data rate parameter, a Modulation and Coding Scheme (MCS) parameter, a user scheduling parameter, or a combination thereof.

8. The apparatus of claim 1 , wherein the one or more transmission parameters include one or more bandwidth management parameters for the first RAT.

9. The apparatus of claim 8 , wherein the transmission controller is configured to set the one or more bandwidth management parameters to direct the transceiver to use a first bandwidth during an activated period of the TDM communication pattern and a second bandwidth during a deactivated period of the TDM communication pattern, the first bandwidth being smaller than the second bandwidth.

10. The apparatus of claim 8 , wherein the transmission controller is configured to set the one or more bandwidth management parameters to direct the transceiver to send a packet having a priority above a threshold over a restricted portion of the medium during an activated period of the TDM communication pattern.

11. The apparatus of claim 1 , wherein the transmission controller is configured to maintain (i) a first set of transmission parameters for the activated periods of the TDM communication pattern and (ii) a second set of transmission parameters for the deactivated periods of the TDM communication pattern.

12. The apparatus of claim 1 , wherein:
the medium comprises one or more time, frequency, or space resources on an unlicensed radio frequency band;
the first RAT comprises Wi-Fi technology; and
the second RAT comprises Long Term Evolution (LTE) technology.

13. A method for managing operation on a communication medium shared between Radio Access Technologies (RATs), comprising:
monitoring the medium, via a transceiver configured to operate in accordance with a first RAT, for signaling associated with a second RAT;
determining one or more Time Division Multiplexing (TDM) parameters of a TDM communication pattern associated with the second RAT based on the monitored signaling, the TDM communication pattern defining activated periods and deactivated periods of communication over the medium in accordance with the second RAT;
setting one or more transmission parameters for the first RAT based on the determined one or more TDM parameters; and
transmitting on the medium, via the transceiver, in accordance with the one or more transmission parameters.

14. The method of claim 13 , wherein the one or more TDM parameters include a parameter related to a periodicity of the TDM communication pattern, a parameter related to a duty cycle of the activated periods of the TDM communication pattern, or a combination thereof.

15. The method of claim 13 , wherein the one or more TDM parameters include a parameter related to a puncturing pattern within a given activated period of the TDM communication pattern.

16. The method of claim 13 , wherein the monitoring comprises:
monitoring the medium for non-first-RAT signaling energy; and
comparing the monitored non-first-RAT signaling energy with a known waveform signature corresponding to the second RAT to associate the signaling with the second RAT.

17. The method of claim 13 , wherein the monitoring comprises:
monitoring the medium for non-first-RAT signaling energy; and
correlating the monitored non-first-RAT signaling energy with a channel reservation message defined for the first RAT to associate the signaling with the second RAT.

18. The method of claim 17 , wherein the determining comprises determining a duty cycle TDM parameter based on a duration field of the channel reservation message.

19. The method of claim 13 , wherein the one or more transmission parameters include a data rate parameter, a Modulation and Coding Scheme (MCS) parameter, a user scheduling parameter, or a combination thereof.

20. The method of claim 13 , wherein the one or more transmission parameters include one or more bandwidth management parameters for the first RAT.

21. The method of claim 20 , wherein the setting comprises setting the one or more bandwidth management parameters to direct the transceiver to use a first bandwidth during an activated period of the TDM communication pattern and a second bandwidth during a deactivated period of the TDM communication pattern, the first bandwidth being smaller than the second bandwidth.

22. The method of claim 20 , wherein the setting comprises setting the one or more bandwidth management parameters to direct the transceiver to send a packet having a priority above a threshold over a restricted portion of the medium during an activated period of the TDM communication pattern.

23. The method of claim 13 , wherein the setting comprises maintaining (i) a first set of transmission parameters for the activated periods of the TDM communication pattern and (ii) a second set of transmission parameters for the deactivated periods of the TDM communication pattern.

24. The method of claim 13 , wherein:
the medium comprises one or more time, frequency, or space resources on an unlicensed radio frequency band;
the first RAT comprises Wi-Fi technology; and
the second RAT comprises Long Term Evolution (LTE) technology.

25. An apparatus for managing operation on a communication medium shared between Radio Access Technologies

Assignees

• Qualcomm Inc

Inventors

• Sadek Ahmed Kamel
• Valliappan Nachiappan

Classifications

• H04W88/10

  adapted for operation in multiple networks, e.g. multi-mode access points · CPC title

• H04J3/1694 Primary

  Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers (Passive Optical Networks H04Q11/0062) · CPC title

• H04W74/0808

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04J3/14

  Monitoring arrangements {(for SDH/SONET rings H04J3/085)} · CPC title

• H04W72/1215 Primary

  for collaboration of different radio technologies · CPC title