Hello, i’m considering setting up a small wireless network consisting of 5 nodes and a central one. Each node is going to have 2 links with the other except the central that is going to have 4. All the data is going to be sent to the central node. As far as i know the use of secondary links can be used for the data to take alternate routes except for the use of backup ones.
I would like to have an overall speed of at leat 100Mbit - if it is possible. Searching around the 802.11n seems to be the most promising for such speed, while I’m not yet sure if it’s better to use 2.4Ghz or 5Ghz antennas. All the links are about 300-500m long and in some parts of the area appear high voltage electricity cables between the nodes.
the better is depend on you area mosty
and if area clear form 2.4 than that will OK if not check your area if it clear from both 2.4GHz and 5GHz it better to use 5GHz
GHz and Network Range
The higher the frequency of a wireless signal, the shorter its range. Thus, 2.4 GHz networks cover a substantially larger range than 5 GHz wireless networks. In particular, the higher frequency wireless signals of 5 GHz networks do not penetrate solid objects nearly as well as do 2.4 GHz signals, limiting their reach inside homes.
Advantage: 2.4 GHz.
GHz and Network Interference
You may notice your cordless phone, automatic garage door opener, or other home appliance also advertises 2.4 GHz signals on its packaging. Because this frequency range is commonly used in consumer products, it’s more likely a 2.4 GHz home network will pick up interference from appliances than will a 5 GHz home network.
Advantage: 5 GHz
GHz and Cost
Some people mistakenly believe 5 GHz network technology is newer or somehow more innovative than 2.4 GHz. In fact, both types of signaling have existed for many years and are both proven technologies.
802.11g Wi-Fi products that run at 2.4 GHz tend to cost less than 802.11a Wi-Fi products not because 802.11g is obsolete or less capable, but because 802.11g is much more popular and thus economical for manufacturers to support.
Advantage: 2.4 GHz
5 GHz vs 2.4 GHz - The Bottom Line
5 GHz and 2.4 GHz are different wireless signaling frequencies that each have advantages for computer networking. Higher frequency networks are not necessarily superior to lower frequency ones, however. So-called dual band hardware combines the best of both types of hardware by integrating both types of radios into the product.
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As Central Link has 4 peers the 2,4GHz Spectrum is to small.
5Ghz has more Spectrum available. I would use POE Feeded
Dualpol CompartmentAntennas 411AH and R52N. Turn down the
wireless power to avoid self interference and separate the Antennas
as far as possible. I would use high Gain Antennas to avoid
interference.
For redundance I would use OSPF.
I’m not sure if I misunderstood, but considering that all the links are going to be point-to-point is there really a spectrum issue ?
Dualpol antennas would be a great choise but unfortunately they are out of budget for us. Using singe pol 14dBi antennas at 2.4Ghz
with 411AH and R52H, with link distance about 300m, can you tell me approximately what is the average bandwidth that i can achieve ?
Those 14dbi antenna will have loads more interference from the side lobes. Are you using two for each link in N? Ubiquity has some cheap dual pole antennas, they are designed for their equipment but you just need the right pigtails, and make some kind of mount adapter so that you can keep the pigtails short.
No, we plan to use simple panels - no dual links. We will try to seperate the antennas for about 1-2 meters.
I searched for Ubiquity but they still are quite expensive for us.
I guess it will be impossible to achieve 100Mbit per link but what are the possible values ? Trying the 802.11n is a good idea ?