Air channel detection method and node device
US10362602B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 26, 2015 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Aug 28, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/542
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A clear channel detection method includes: if a node device performs a CCA detection for the first time and finds that a full bandwidth of an unlicensed carrier channel is in a busy state, the node device divides the full bandwidth of the unlicensed carrier channel into two or more sub-bandwidths for the first time according to a preset division manner; if the node device performs the CCA detection again and finds that all sub-bandwidths are in the busy state, the node device divides each of the divided sub-bandwidths into two or more sub-bandwidths for the second time according to the preset division manner, and continues to perform CCA detection until the CCA detects that any sub-bandwidth is in a clear state, or the number of CCA cycle detections is up to a maximum value, then exits from the CCA cycle detections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.