Active Topics
-
Camera phone competition March 2023 "Endless" (35)
to General by Maemish - 1 day, 14 hrs ago -
TLS 1.2 for N9 is ready (28)
to MeeGo / Harmattan by smartblu9 - 1 day, 15 hrs ago -
Maemo repository (3)
to Community by torsen - 2 days, 7 hrs ago -
Error after installing Leste on sdcard (11)
to Maemo 7 / Leste by Maemish - 3 days, 4 hrs ago -
Introducing ubiboot N9 (multiboot OS loader) (1,393)
to Alternatives by smatkovi - 4 days, 11 hrs ago - more...
 |
|
2014-09-02
, 17:45
|
|
Posts: 6,453 |
Thanked: 20,983 times |
Joined on Sep 2012
@ UK
|
#2
|
Originally Posted by nokiabot
In theory, no. Both are limited (by law, at least in Europe) to a maximum of 100mW EIRP.
can i get better coverage from a wifi acces point than the n900
What does that mean?
Mobile phones' directional characteristics should be pretty much isotropic (that is, they radiate the same in every direction), to achieve the same performance no matter which way they are rotated. Wireless access points (WAP) generally have (a set of) directional antennas to achieve a more efficient distribution. Think of your phone as a WAP: all the waves it radiates to the sky and to the ground are wasted. With a flatter directional diagram, you could cover a bigger area with the same power. Or the same area with less power.
The above 100mW EIRP limitation postulates that with a more efficient antenna, a WAP is limited to the latter option, covering the same ditance in the direction of peak sensitivity as the mobile phone does in any direction, only using less power.
So no, a WAP does not transmit farther. It can, however, receive more efficiently which may help a little bit in edge situations.
This is all just a theory though. You would be better off performing an experiment and giving us the results. Do not forget to state the make and model when you do. Not all WAPs are created equally compliant
 |
|
2014-09-04
, 15:16
|
|
Posts: 1,974 |
Thanked: 1,834 times |
Joined on Mar 2013
@ india
|
#3
|
@pichlo thanks for the explanations i was just wondering about those anteenas in wap 
so buying one would be a waste of money rather i test it on a friends wap
one more question about those channels what are they for i.e when i check connection details it says connected to channel 1 and i googled a bit so just want to know how to change them on a n900 and weather they are responsible for speed /coverage
i disabled power savings in /settings/internet connections/n900 hotspot so thats it or there is something more to do
any advice on hotspot security to tighten it a bit more
so far i figured out quite a few things by myself next is ssh sheduled on sunday .. i am exited
so buying one would be a waste of money rather i test it on a friends wap one more question about those channels what are they for i.e when i check connection details it says connected to channel 1 and i googled a bit so just want to know how to change them on a n900 and weather they are responsible for speed /coverage
i disabled power savings in /settings/internet connections/n900 hotspot so thats it or there is something more to do
any advice on hotspot security to tighten it a bit more
so far i figured out quite a few things by myself next is ssh sheduled on sunday .. i am exited
|
|
2014-09-04
, 17:34
|
|
Posts: 6,453 |
Thanked: 20,983 times |
Joined on Sep 2012
@ UK
|
#4
|
If you want to learn about a subject, an encyclopedia is a good start
A channel simply means a carrier frequency. Like on your TV or FM radio: you can retune to a different one to get a different station. Depending on the region, WiFi can use 12, 13 or 14 channels. That is quite a limited number, so WiFi routers quite often share the same channels. (The situation is actually even worse due to the channels overlapping, read the Wikipedia article. In practice you are stuck with only about 3 usable channels.)
If two networks share the same channel, they need to time multiplex (basically same as time sharing on your holiday property). In other words, two networks on the same channel compete for the bandwidth which may result in a slower connection. To avoid the problem, it may help to switch to a less busy channel.
How to do that is device specific. Most routers and WAPs have a web interface with a lot of options, including the channel. Whether or where such an option is in QT Mobile Hotspot, I have no idea. Never used it and do not intend to.
Last edited by pichlo; 2014-09-04 at 17:44.
A channel simply means a carrier frequency. Like on your TV or FM radio: you can retune to a different one to get a different station. Depending on the region, WiFi can use 12, 13 or 14 channels. That is quite a limited number, so WiFi routers quite often share the same channels. (The situation is actually even worse due to the channels overlapping, read the Wikipedia article. In practice you are stuck with only about 3 usable channels.)
If two networks share the same channel, they need to time multiplex (basically same as time sharing on your holiday property). In other words, two networks on the same channel compete for the bandwidth which may result in a slower connection. To avoid the problem, it may help to switch to a less busy channel.
How to do that is device specific. Most routers and WAPs have a web interface with a lot of options, including the channel. Whether or where such an option is in QT Mobile Hotspot, I have no idea. Never used it and do not intend to.
Last edited by pichlo; 2014-09-04 at 17:44.
| The Following User Says Thank You to pichlo For This Useful Post: | ||
|
|
2014-09-04
, 18:47
|
|
Posts: 1,974 |
Thanked: 1,834 times |
Joined on Mar 2013
@ india
|
#5
|
well anybody else ?
the avove guy referd encyclopedia
till then hunting as suggested
thanks
the avove guy referd encyclopedia
till then hunting as suggested
thanks
|
|
2014-09-07
, 13:43
|
|
Posts: 1,974 |
Thanked: 1,834 times |
Joined on Mar 2013
@ india
|
#6
|
how do i ping a n900 via another n900 via wifi ?
|
|
2014-09-07
, 13:58
|
|
Posts: 1,974 |
Thanked: 1,834 times |
Joined on Mar 2013
@ india
|
#7
|
Originally Posted by pichlo
well you are right an wap is not so diffrent in coverage its just a bit stronger in the deadzones but then the n900 fails to connect i discoverd that by a putting the n900 on a canteena intresting thing is if a canteena is used in both sides the effective range increases by almost 20 mts more
In theory, no. Both are limited (by law, at least in Europe) to a maximum of 100mW EIRP.
What does that mean?
Mobile phones' directional characteristics should be pretty much isotropic (that is, they radiate the same in every direction), to achieve the same performance no matter which way they are rotated. Wireless access points (WAP) generally have (a set of) directional antennas to achieve a more efficient distribution. Think of your phone as a WAP: all the waves it radiates to the sky and to the ground are wasted. With a flatter directional diagram, you could cover a bigger area with the same power. Or the same area with less power.
The above 100mW EIRP limitation postulates that with a more efficient antenna, a WAP is limited to the latter option, covering the same ditance in the direction of peak sensitivity as the mobile phone does in any direction, only using less power.
So no, a WAP does not transmit farther. It can, however, receive more efficiently which may help a little bit in edge situations.
This is all just a theory though. You would be better off performing an experiment and giving us the results. Do not forget to state the make and model when you do. Not all WAPs are created equally compliant
one more thing is a wap is bit stable the dbm dosent jump much wheras the n900 hotspot dbm fractulates a bit.
| The Following User Says Thank You to nokiabot For This Useful Post: | ||
|
|
2014-09-07
, 14:04
|
|
Posts: 6,453 |
Thanked: 20,983 times |
Joined on Sep 2012
@ UK
|
#8
|
Originally Posted by nokiabot
how do i ping a n900 via another n900 via wifi ?
Code:
ping <other N900's IP address>
| The Following User Says Thank You to pichlo For This Useful Post: | ||
|
|
2014-09-07
, 14:09
|
|
Posts: 1,974 |
Thanked: 1,834 times |
Joined on Mar 2013
@ india
|
#9
|
Originally Posted by pichlo
damm it was so easy
Oddly, on N900 you need to be root to run ping. This should not be the case and is usually not the case on other OSes but there you go.Code:ping <other N900's IP address>
thanks
how to increase hotspot security a bit so that precious data isint gobbeld up by someone easily as a couple of days ago 500+mb were missing from my account though i didnt use a password back then
also can i get better coverage from a wifi acces point than the n900 how diffrent is that?