Dynamic and flexible channel selection in a wireless communication system

• US 9,819,446 B2
• Filed: 10/27/2015
• Issued: 11/14/2017
• Est. Priority Date: 10/29/2014
• Status: Active Grant

• Current Assignee: Freewave Technologies Incorporated
• Original Assignee: Freewave Technologies Incorporated
• Inventors: McMeekin, Steven E., Mester, Timothy G., Veintimilla, Gregory J.
• Primary Examiner(s): REGO, DOMINIC E
• Application Number:
  US14/924,349
• Publication Number:
  US 20160127953A1
• Time in Patent Office: 749 Days
• Field of Search: 4554221, 455450-453, 4554562, 455464, 455509, 455510, 37039541, 370332
• CPC Class Codes: H04B 17/102 Power radiated at antenna
• CPC Class Codes: H04B 17/18 Monitoring during normal operation
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0042 Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape H04L1/0067 takes precedence
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for operating a downlink transmitter radio to automatically determine transmission parameters includes monitoring the spectral content of a range of frequencies, and identifying, based on the monitored spectral content, spectral characteristics associated with noise or interference. The downlink transmission channel carrier frequency and channel frequency bandwidth are determined based on the spectral characteristics of the interference together with operating requirements of the wireless transmission system.

Claims

1. A method for a downlink transmitter radio to automatically determine transmission parameters, comprising:

monitoring, at the downlink transmitter, the spectral content of a range of frequencies;

identifying, at the downlink transmitter and based on the monitored spectral content, spectral characteristics including frequency and power associated with noise or interference;

determining, at the downlink transmitter, downlink transmission channel carrier frequency and channel frequency bandwidth parameters based on the spectral characteristics of the interference together with operating requirements of the wireless transmission system; and

determining, at the downlink transmitter, channel carrier frequency or channel frequency bandwidth parameters for one or more uplink transmitters based on the spectral characteristics of the interference together with the operating requirements of the wireless transmission system.

2. The method of claim 1 and further including determining the downlink transmitter channel carrier frequency or channel frequency bandwidth based on information obtained from one or more uplink transmitters.

3. The method of claim 1 and further including sending, from the downlink transmitter, channel carrier frequency or channel frequency bandwidth parameters to one or more uplink transmitters for use in subsequent wireless communications.

4. The method of claim 1 and further including changing the channel carrier frequency or channel frequency bandwidth parameters of the uplink or downlink transmitters based on changes in the operating environment.

5. The method of claim 1 and further including changing the channel carrier frequency or channel frequency bandwidth parameters of the uplink or downlink transmitters based on changes in the requirements of the wireless communication system.

6. The method of claim 1 and further including determining the power levels for one or more of the downlink or uplink transmitters based on the spectral characteristics of the interference together with other operating requirements of the wireless transmission system.

7. The method of claim 1 and further including changing the power levels for one or more downlink or uplink transmitters based on changes in the operating environment or changes in the requirements of the wireless communications system.

8. The method of claim 1 and further including determining the modulation scheme for one or more downlink or uplink transmitters based on the spectral characteristics of the interference together with other operating requirements of the wireless transmission system.

9. The method of claim 1 and further including changing the modulation scheme for one or more downlink or uplink transmitters based on changes in the operating environment or changes in the requirements of the wireless communications system.

10. The method of claim 1 and further including determining the forward error correction coding rate for one or more downlink or uplink transmitters based on the spectral characteristics of the interference together with other operating requirements of the wireless transmission system.

11. The method of claim 1 and further including changing the forward error correction coding rate for one or more downlink or uplink transmitters based on changes in the operating environment or changes in the requirements of the wireless communications system.

12. The method of claim 1 and further including one or more uplink transmitters analyzing the operating environment and ranking the available channel carrier frequencies and/or channel frequency bandwidths and sending a ranked list of channel carrier frequencies and/or channel frequency bandwidths to the downlink transmitters.

13. The method of claim 12 and further including the downlink transmitters analyzing the one or more ranked list of channel carrier frequencies and/or channel frequency bandwidths received from the uplink transmitters and using the ranked list to further determine the downlink transmitter transmission channel carrier frequencies and/or channel frequency bandwidths.

14. The method of claim 1 and further including transmitting, from the downlink transmitter, a signal using the determined downlink transmission channel carrier frequency and channel frequency bandwidth parameters.

15. The method of claim 1 wherein determining downlink transmission channel carrier frequency and channel frequency bandwidth parameters includes determining the parameters based on system capacity optimization.

16. A radio configured to operate in accordance with the method of claim 1.