A bit more on LiFi

[yaputya]

http://www.elektor.com/news/lifi-ready-to-go.2583704.lynkx

"Chi Nan, information technology professor at Shanghai's Fudan University, working with a research team of scientists from Shanghai
Institute of Technical Physics at the Chinese Academy of Sciences announced they would be demonstrating and making available a LiFi
kit at the China International Industry Fair in November. She said that the kit uses a one-watt light emitting diode (LED) to
provide 150 Mbps access to the Internet for up to four computers."

No details yet on the router<>LED link or the PC>LED link.
Can't see how LiFi will save bandwidth if it still needs WiFi to talk to the router.

 

[Bob Milutinovic]

"yaputya" <yaputya.leftlegin@gmail.com> wrote in message
news:bcuqh3F44ntU1@mid.individual.net...

http://www.elektor.com/news/lifi-ready-to-go.2583704.lynkx

"Chi Nan, information technology professor at Shanghai's Fudan University,
working with a research team of scientists from Shanghai Institute of
Technical Physics at the Chinese Academy of Sciences announced they would
be demonstrating and making available a LiFi kit at the China
International Industry Fair in November. She said that the kit uses a
one-watt light emitting diode (LED) to provide 150 Mbps access to the
Internet for up to four computers."

No details yet on the router<>LED link or the PC>LED link.
Can't see how LiFi will save bandwidth if it still needs WiFi to talk to
the router.

Why would it need WiFi? What's wrong with copper?

--
Bob Milutinovic
Cognicom

 

[yaputya]

"Bob Milutinovic" <cognicom@gmail.com> wrote in message news:l4dp0v$2ug$1@dont-email.me...

"yaputya" <yaputya.leftlegin@gmail.com> wrote in message news:bcuqh3F44ntU1@mid.individual.net...
http://www.elektor.com/news/lifi-ready-to-go.2583704.lynkx

"Chi Nan, information technology professor at Shanghai's Fudan University, working with a research team of scientists from
Shanghai Institute of Technical Physics at the Chinese Academy of Sciences announced they would be demonstrating and making
available a LiFi kit at the China International Industry Fair in November. She said that the kit uses a one-watt light emitting
diode (LED) to provide 150 Mbps access to the Internet for up to four computers."

No details yet on the router<>LED link or the PC>LED link.
Can't see how LiFi will save bandwidth if it still needs WiFi to talk to the router.

Why would it need WiFi? What's wrong with copper?

1) You have to get data from the PC back to the router. So far all the info
only talks about downloading from the LED to the PC.
If you have to run a cable to the PC (or use WiFi) for uploading, then there
is little point in using LiFi.

2) Although it is possible to use the power wiring to connect the LED to the router,
AFAIK current systems struggle to achieve 15 Mbps.
There are faster powerline technologies coming, but so is better WiFi no doubt.

--
Bob Milutinovic
Cognicom

 

[Don McKenzie]

On 26-Oct-13 2:00 AM, yaputya wrote:

"Bob Milutinovic" <cognicom@gmail.com> wrote in message news:l4dp0v$2ug$1@dont-email.me...
"yaputya" <yaputya.leftlegin@gmail.com> wrote in message news:bcuqh3F44ntU1@mid.individual.net...
http://www.elektor.com/news/lifi-ready-to-go.2583704.lynkx

"Chi Nan, information technology professor at Shanghai's Fudan University, working with a research team of scientists from
Shanghai Institute of Technical Physics at the Chinese Academy of Sciences announced they would be demonstrating and making
available a LiFi kit at the China International Industry Fair in November. She said that the kit uses a one-watt light emitting
diode (LED) to provide 150 Mbps access to the Internet for up to four computers."

No details yet on the router<>LED link or the PC>LED link.
Can't see how LiFi will save bandwidth if it still needs WiFi to talk to the router.

Why would it need WiFi? What's wrong with copper?

1) You have to get data from the PC back to the router. So far all the info
only talks about downloading from the LED to the PC.
If you have to run a cable to the PC (or use WiFi) for uploading, then there
is little point in using LiFi.

2) Although it is possible to use the power wiring to connect the LED to the router,
AFAIK current systems struggle to achieve 15 Mbps.
There are faster powerline technologies coming, but so is better WiFi no doubt.

That's the way I see it too.

Li-Fi is only providing the link from the LED source to the PC.

Even if magically the Internet was available inside the LED source, how do you do two way comms from the PC to the LED?


--
Don McKenzie

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