bsamarah
join:2005-08-09
San Jose, CA
|  reply to GuyS25
Re: WISP equipment to penetrate houses in 2km range
Appreciate the reply...
Forgive the ignorance, how can these dfferent frequencies work togather.. Can you suggest any equipement types that are needed?
Second low poer APs I am assuming you mean lower frequency, like 900MHz?
Does the lower frequency => less distance ?
I am assuming that a wireless ISP should probably use a 5.8Ghz backhaul. The transmission to a house with line of sigh can be 2.4Ghz but to a building or a covered area would need to be something for the 900MHz range ?
Hope it is not too much and thanks in advance.
Later
bsamarah |
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sbeasley
join:2005-06-28
Albion, IN
2 edits | Re: WISP equipment to penetrate houses in 2km rang
1. When he says work together I assume that he meant that they can work at the same time without interfering with one another.
2. Low power AP's don't mean less frequency, you can adjust the power to effectively change the range that an AP has.
3. I explained this in another post so this is a copy, and the answer is: It depends on your location.
The 900 MHz spectrum has a larger fresnel zone than 2.4 GHz, and 2.4 GHz has a larger fresnel zone than 5.8 GHz, meaning that to go a greater distance 2.4 GHz would go farther than 900 MHz, and 5.8 GHz would go farther than 2.4 GHz. All this is given the ground is flat and there are no obstructions, and the CPE and AP's are exactly the same height. A large fresnel zone will contact the ground and other obstructions. A lower frequency will contact these obstructions before the higher frequencies will. Now having said that. If there are trees and obstructions, then 900 MHz can "pass" through this type of interference better than 2.4 GHz, and 2.4 GHz can "pass through this type of interference better than 2.4 GHz. So to answer your question. It depends, but I hope this gives you a better understanding of what spectrum you will want to use. Typically 2.4 GHz and 5.8 GHz are you LOS solutions, and 900 MHz is your NLOS solution. |
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bsamarah
join:2005-08-09
San Jose, CA
| Dude..
This is great information, I am really thakfull. So how can you connect all these frequencies togather? Do you need a specific device of some sort ? I mean if, I use a 900MHz signal to connect a sight but my backhaul is 5.8Ghz or 2.4Ghz then I would need a mediume in between right ? If so what is it? Where can I find it?
Later..
Basem. |
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sbeasley
join:2005-06-28
Albion, IN
1 edit | I'm believe that you would need a couple ethernet cables and a bridge of some sort. I've personally not done this, so don't take my word for it. |
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anoclon
join:2004-10-12
Guatemala | reply to jlrubia
Re: WISP equipment to penetrate houses in 2km range
in 2.4Ghz, even with a 2 watt amplifier added to a 15dB omni you won't penetrate trees or walls in a radio bigger than a couple of blocks. But with line of sight on both ends, 2 kilometers it's really easy. That's my experience. |
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jlrubia
join:2005-08-03
| reply to jlrubia
i think i already have the answer to this problem. there is already an obstruction penetrating antenna in the market. kindly please ckeck this link and please give comment if this will solve the trees and concrete walls penetration problem with in 1 to 2 km range. »www.wifi-plus.com/pages/2/index.htm and also read the forum link. »www.wifi-plus.shoppingcartsplus.···7784.htm |
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DaDogs
Semper Vigilantis
Premium
join:2004-02-28
Deltaville, VA
| Re: WISP equipment to penetrate houses in 2km rang
said by jlrubia  :i think i already have the answer to this problem. there is already an obstruction penetrating antenna in the market. kindly please ckeck this link and please give comment if this will solve the trees and concrete walls penetration problem with in 1 to 2 km range. » www.wifi-plus.com/pages/2/index.htm and also read the forum link. » www.wifi-plus.shoppingcartsplus.···7784.htm No it will not solve the problem. If there was a magic bullet, we would already be using it.
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Improve your wireless signal! |
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jober
join:2001-12-13
| reply to jlrubia
said by jlrubia :i think i already have the answer to this problem. there is already an obstruction penetrating antenna in the market. kindly please ckeck this link and please give comment if this will solve the trees and concrete walls penetration problem with in 1 to 2 km range. » www.wifi-plus.com/pages/2/index.htm and also read the forum link. » www.wifi-plus.shoppingcartsplus.···7784.htm It's sickening the price they charge for those antennas. And if you buy them and then open them up you will see what I mean. |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to jlrubia
said by jlrubia :i think i already have the answer to this problem. there is already an obstruction penetrating antenna in the market. kindly please ckeck this link and please give comment if this will solve the trees and concrete walls penetration problem with in 1 to 2 km range. » www.wifi-plus.com/pages/2/index.htm and also read the forum link. » www.wifi-plus.shoppingcartsplus.···7784.htm Those antennas are worthless, and some have gotten better performance out of good old cheap Superpass antenna.:)
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»www.wavecrazy.net Join WISPA today! »www.wispa.org/ |
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jlrubia
join:2005-08-03 | reply to jlrubia
Re: WISP equipment to penetrate houses in 2km range
but wi-fi plus claimed that thier antenna will penetrate trees and concrete walls. what they have claimed are untrue? please give me proof if you have experienced this wi-fi plus antenna and fialed to accomplish your goal. |
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DejanCDN
join:2004-11-17
Kuwait
| Re: WISP equipment to penetrate houses in 2km rang
OK..let me try a stab at this. Physics of radio propagation don't change for ANY manufacturer. 2.4GHz signal will not go through trees. What Wi-Fi Plus claims is that they can boost what little signal does come through trees and make use of it. Reality is (do a Search on this board), that people's experience with their antennas does not back up their claims. Considering the physics, it is unlikely that someone will be able to come up with something that does work.
Antennas do not penetrate anything by the way - they pick up signals (if any are present) and amplify them.
Re. how you make use of 900MHz, 2.l4Ghz, 5.8GHz etc in the same network and how you interconnect them, well, that is easy if you draw it. Each device has an Ethernet Port. How do you connect multiple devices with Ethernet ports? With an Ethernet Switch or a Hub. This has nothing to do with which frequency they operate at. On local area network level, all this equipment is a bunch of boxes with Ethernet ports, so treat them that way. |
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bsamarah
join:2005-08-09
San Jose, CA
| Agreed.. I realized what a stupid question it was after the post, but I figured it does not hurt to hear another opinion. Thanks for clarification, it is a great idea to think of these as boxes with ethernet ports... Many thanks to all who participated.
Thanks
Basem. |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| said by bsamarah :Agreed.. I realized what a stupid question it was after the post, but I figured it does not hurt to hear another opinion. Thanks Basem. There is no such thing as as a stupid question:D
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»www.wavecrazy.net Join WISPA today! »www.wispa.org/ |
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Seaboogers
join:2004-11-01
Sarasota, FL
| said by superdog :said by bsamarah :Agreed.. I realized what a stupid question it was after the post, but I figured it does not hurt to hear another opinion. Thanks Basem. There is no such thing as as a stupid question:D Actually there is such thing as a "stupid" question it's called:
The UNASKED question!!! |
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superdog
I Need A Drink
Premium,MVM
join:2001-07-13
Lebanon, PA
| reply to DejanCDN
said by DejanCDN :OK..let me try a stab at this. Physics of radio propagation don't change for ANY manufacturer. 2.4GHz signal will not go through trees. What Wi-Fi Plus claims is that they can boost what little signal does come through trees and make use of it. Reality is (do a Search on this board), that people's experience with their antennas does not back up their claims. My point exactly!. Over the years, I have been BS'ed by so many sales reps., and have bought and then promptly sold on ebay, way to many pieces of gear. The long and short of this is just what DejanCDN said, "Physics of radio propagation don't change for ANY manufacturer". Unless they have God on their engineering staff, nothing new is going to happen in this dept.:D
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ike20004
join:2004-08-11
Bowie, MD | reply to jlrubia
If you can shell-out the dough, then Navini and like proprietary systems can do it. $300,000.00 for a start!
»www.navini.com |
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