License assisted listen-before-talk
US10455559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2016 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Jan 30, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/0816
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods are disclosed herein that relate to the use of signals in a licensed spectrum to assist with determining a status of an unlicensed channel(s) in an unlicensed spectrum. In some embodiments, a method of operation of a wireless device in a wireless system in which the wireless device transmits and/or receives in both a licensed spectrum and an unlicensed spectrum comprises attempting to detect a busy indication transmitted in the licensed spectrum. The busy indication is an indication that another wireless device is transmitting in the unlicensed spectrum. The method further comprises determining whether to transmit in the unlicensed spectrum based on whether the wireless device has detected a busy indication transmitted in the licensed spectrum. By using signals in the licensed spectrum, the hidden node problem and/or the exposed node problem in the unlicensed spectrum can be mitigated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.