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2010-11-09
, 14:24
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Posts: 361 |
Thanked: 219 times |
Joined on Sep 2010
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#12
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Originally Posted by pisthpeeps
Or PTT via WLAN with several N900 negotiating which makes the
May be useful in below situation...
Crowded london underground train where there is no mobile signal.
Luckily you have got a seat. Your buddy gets into the same compartment in the next station and sees you. He gets a seat 10m away from you and wants to talk to you on something very urgent.
Other way : Bluetooth file transfer with the text message. :-)
ad hoc.
Oh well, battery may be against this idea.
;-)
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2010-11-09
, 14:35
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Posts: 18 |
Thanked: 25 times |
Joined on Nov 2010
@ Germany
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#13
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Video and voice transmission over bluetooth or wifi would be much better.
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2010-11-09
, 14:39
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Posts: 5,335 |
Thanked: 8,187 times |
Joined on Mar 2007
@ Pennsylvania, USA
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#14
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Originally Posted by Robokopp
For audio, you might look at DT-Talkie. Discussion of that application/technology (for pre-Maemo 5 devices) occurred here in the thread "DT-Talkie v2.1 = Walkie Talkie mode?"
Video and voice transmission over bluetooth or wifi would be much better.
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2010-11-24
, 20:43
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Posts: 1 |
Thanked: 1 time |
Joined on Nov 2010
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#15
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Originally Posted by mscion
Looking at other posts the range is less than 10m.
I would like to correct this value. The range at which the N900 can transmit FM is maximum 6 meters.
I personally tried this out with almost all the radios i can ever imagine: car radio, normal radio, cell phone radio receivers, walkie talkies, nothing received the N900's signals after 6 meters.
I kept in mind the other sources of interference and minimized them as much as possible.
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2010-11-25
, 15:23
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Posts: 561 |
Thanked: 75 times |
Joined on Jan 2010
@ Spain
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#16
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I would use the point Personal WIFI in "ad-hoc" and would use gstreamer or pulseaudio.
I'm trying with the PC (Ubuntu) first to see commands.
I'm trying with the PC (Ubuntu) first to see commands.
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2010-11-25
, 15:54
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Administrator |
Posts: 1,036 |
Thanked: 2,019 times |
Joined on Sep 2009
@ Germany
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#17
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there is an actual easy setup for pulse audio using rtp multicast where you make your mic available to your network and listen to the incoming mic streams. This is not recommended has it is really high traffic on normal use (full frequency base, you might use that for music or sound streaming of high quality) and the downside is that it might cause problems with your wifi setup (rtp/multicast kills my home-wan-wifi-router's wifi even if the multicast comes from a wired device).
A walkie-talkie like setup for any kind of connection would be useful, using BT as headset devices but only pair mics or a push2talk like setup for wifi with reduced bandwidth without the need of a proper server. You might use pulseaudio's implemented functions for it but not streaming at 48kHz 24bit.
Server based there is a Teamspeak clone (mumble?) or Teamspeak itself.
A walkie-talkie like setup for any kind of connection would be useful, using BT as headset devices but only pair mics or a push2talk like setup for wifi with reduced bandwidth without the need of a proper server. You might use pulseaudio's implemented functions for it but not streaming at 48kHz 24bit.
Server based there is a Teamspeak clone (mumble?) or Teamspeak itself.
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useful links for newcomers: New members say hello, New users start here, Community subforum, Beginners' wiki page, Maemo5 101, FAQ
useful links for newcomers: New members say hello, New users start here, Community subforum, Beginners' wiki page, Maemo5 101, FAQ
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2010-11-25
, 22:18
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Posts: 117 |
Thanked: 47 times |
Joined on Apr 2010
@ UK
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#18
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it would be nice to have something like this for N900 http://www.4pockets.com/product_info.php?p=62
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2010-11-25
, 23:48
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Posts: 1,998 |
Thanked: 3,344 times |
Joined on Jun 2010
@ N900: Battery low. N950: torx 4 re-used once and fine; SIM port torn apart
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#19
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Quick question...
Why cannot cellular frequency be used without cellular towers, in peer-to-peer style?
Like: you send SMS, it's regularly broadcasted to all phones within reach, they re-broadcast it regularly, it's received by the end recipient, it replies instantaneously with "Message X received, stop shouting", they broadcast messages "Message X received by the end recipient, stop shouting" to everybody, when sender receives this message, he knows that message is received and stops sending it.
It has large potential for an avalanche, but utilizes no costly cellular towers. If you send/receive messages rarely and place calls once in a month, the P2P network will be underused.
It works better when the density of phones is high enough to be reliable and low enough to prevent an avalanche.
Why cannot cellular frequency be used without cellular towers, in peer-to-peer style?
Like: you send SMS, it's regularly broadcasted to all phones within reach, they re-broadcast it regularly, it's received by the end recipient, it replies instantaneously with "Message X received, stop shouting", they broadcast messages "Message X received by the end recipient, stop shouting" to everybody, when sender receives this message, he knows that message is received and stops sending it.
It has large potential for an avalanche, but utilizes no costly cellular towers. If you send/receive messages rarely and place calls once in a month, the P2P network will be underused.
It works better when the density of phones is high enough to be reliable and low enough to prevent an avalanche.
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2010-11-26
, 00:09
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Posts: 79 |
Thanked: 37 times |
Joined on May 2010
@ Melbourne Australia
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#20
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Originally Posted by Wikiwide
That is the best idea I have seen in ages however im very sure that cellular transmission software in all mobiles is closed source
Quick question...
Why cannot cellular frequency be used without cellular towers, in peer-to-peer style?
Like: you send SMS, it's regularly broadcasted to all phones within reach, they re-broadcast it regularly, it's received by the end recipient, it replies instantaneously with "Message X received, stop shouting", they broadcast messages "Message X received by the end recipient, stop shouting" to everybody, when sender receives this message, he knows that message is received and stops sending it.
It has large potential for an avalanche, but utilizes no costly cellular towers. If you send/receive messages rarely and place calls once in a month, the P2P network will be underused.
It works better when the density of phones is high enough to be reliable and low enough to prevent an avalanche.
Example:
Using a traditional 2 way radio/repeater system:
"Anyone know where Starbucks is?"
VS
Using a Nextel PTT-style system:
"Bill, do you know where the Starbucks is?"
"John, do you know where the Starbucks is?"
"Sam, do you know where the Starbucks is?"
(etc)
I know that Nextel has/had a group option, but it had to be pre-programmed ahead of time, and there were added costs that made it very prohibitive to implement.
Extra points for making PC and other phone clients.