Brazilian telecommunication operators union Sinditelebrasil is proposing the use of the 700 Mhz frequency for LTE mobile services, on top of the 2.5 Ghz band backed by the federal government, a source at Telebrasil, who asked not to be named, told BNamericas.
To technically prove that 700 Mhz is superior for mobile services purposes, Sinditelebrasil has commissioned a special study from IT and telecoms R&D firm CPqD.
According to the source, the study shows that the "higher the frequencies are, the worse the signal will be," and so the 2.5 Ghz band would not be the most suitable for 4G, or long term evolution (LTE), purposes. The government has insisted on moving forward with tenders for the 2.5 Ghz bandwidth next April eyeing the deployment of 4G in the country, amidst criticism by some operators.
The source said, though, that the results of this study have not yet been reviewed by the whole board of Sinditelebrasil associates - formed by CEOs of the country's major operators - and that a second part of it is likely to be released "soon."
The source also noted that the UN's international telecommunication union (ITU) also recommends the 700 MHz frequency for mobile services, which is a worldwide trend.
In the study, CPqD highlights that in order to meet the increasing demand in mobile, wireless communication services, with larger amounts of heavy data, the country will need more frequencies by 2015.
Also, the government expects to switch off the TV analogical signals by 2016, which will make the 700 MHz band, currently used for TV transmission, available for mobile services.
Associated with this, according to CPqD, in most municipalities (91%) only eight of the 57 available TV channels are being used, "which facilitates the immediate allocation of the frequency for other purposes."
"The transmission frequency currently occupied by TV presents excellent conditions for the propagation of signals. Compared to higher frequencies, this band offers an increased range and better signal reception inside buildings," asserts CPqD.
The switching off of analog transmissions will occur by 2012 in most European countries, as well as in the US, Canada, South Korea and Japan. Russia, India, China and Mexico will turn off the analog signal by 2015, and Brazil and other Latin America countries, as well as Africa and Asia from 2016.