Mobile radio communication system and radio communication method
US8290426B2 · kind B2 · utility
Assignees
Inventor
Key dates
| Filing date | Feb 19, 2009 |
| Grant date | Oct 16, 2012 |
| Priority date | — |
| Expiry date | Jun 15, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a mobile radio communication system of the cognitive radio method, a database device has a use state table indicating a probability that each frequency band is used for each period of time and for each location. An on-vehicle terminal acquires a frequency band having the highest probability that the band is empty at the current time and the current location according to the use state table and performs a radio communication by using the frequency band. The use state table is preferably created by a statistical process using the database device which acquires the use states of frequency bands of various locations and times by using respective vehicles as probe cars. Thus, it is possible to detect the frequency of the empty state in a short time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.