Questions

Long Range Routers

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Long Range Routers

theaceofpsade
What are the available long range routers in market. what are the specifications for such routers. Any available router that can cover 500m or more range?

Clarifications

jqbecker

Please clarify:
-what is the nature of the surrounding structure, and outdoor terrain?
-what are you trying to provide connectivity for - what is the intended usage?

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    1 Votes
    OH Smeg

    In theory any WiFi device should cover a 500 metre radius but that assumes an ideal environment with nothing to absorb the signal or otherwise interfere with it.

    Things like walls and any metal between the 2 points will degrade the signal and because of the way that Radio Propergates and depending on the direction of the aerial that can be very little in one plane while a decent distance in another plane. Generally speaking Radio Signals radiate out from the router with very little up or down signal so you need to be in the same plane and not above or below.

    What I think you are asking about here are Directional Aerials which are available for some WiFi Access Points which will increase the signal in one direction at the expense of all other directions. Also you don't need a bunch of Routers just the 1 Router that connects to the internet and any subsequent ones are WiFi Extenders as there is no need for routers after you have the first one set up.

    For some idea of what is involved try looking here for information about Directional Areials

    http://www.simplewifi .com/antennabasics.html?sl=EN
    remember to remove the space from between simplewifi and the .com for a working link.

    Col

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    2 Votes
    robo_dev

    For a point-to-point WLAN bridge, it is possible with the right antennas and clear line-of-sight to go literally miles. I think the world record is something like 27 miles between two mountain-tops somewhere in South America.

    For an Access Point (or WLAN router), it is important to remember that it is a two-way radio link. So even if you have some unbelievably high-gain transmit antenna, the return signal from the client has to cover the same distance. Yes, a high-gain antenna will pick up faraway signals better, but there's no way the tranmitter/antenna in an iPhone, for example, will work over any significant distance.

    Keep in mind, by the way, that the antenna gain and radio output power is regulated by local law. So in the US, for example, WiFi is typically 100mW but the effective radiated power (ERP) can be pumped up to something like 10W ERP using a particularly high-gain antenna, while 4W ERP is the legal limit.

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    0 Votes
    theaceofpsade

    Considering the structure is an educational institution and Students will be connecting to a central wireless access point which will be a wireless router connected to a server. Also, considering that Building is multi floored, has classrooms, boardrooms and Students should be able to connect to the access point from their classrooms using Mobile devices. The idea is to have an Intranet. what are the possible network solutions for this. How can this scenario be implemented

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    0 Votes
    jqbecker

    OK, you need to really describe the size, shape, construction of the building(s). You mention "access point" as if a single AP will handle the traffic. I can tell you right now that is never going to work. You have to think in terms of multiple access points spread throughout the building(s).

    A 100% wireless network is most likely not possible. You will find you need to run cable to the remote AP's for best performance. If you try for 100% wireless, it will be one of two results: 1) Not going to work at all, [or] 2) not going to work well.

    I suggest working with a local WiFi vendor who has experience in doing large-scale projects such as this.

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    2 Votes
    OH Smeg

    But you need a Optical Fiber Backbone with WiFi Access Points on every floor and in every building. You may require more than 1 WiFi Access Point per floor depending on the construction of the building and the number of people who are expected to be using the system.

    That should give you a good starting point if nothing else.

    Col

  • +
    1 Votes
    OH Smeg

    In theory any WiFi device should cover a 500 metre radius but that assumes an ideal environment with nothing to absorb the signal or otherwise interfere with it.

    Things like walls and any metal between the 2 points will degrade the signal and because of the way that Radio Propergates and depending on the direction of the aerial that can be very little in one plane while a decent distance in another plane. Generally speaking Radio Signals radiate out from the router with very little up or down signal so you need to be in the same plane and not above or below.

    What I think you are asking about here are Directional Aerials which are available for some WiFi Access Points which will increase the signal in one direction at the expense of all other directions. Also you don't need a bunch of Routers just the 1 Router that connects to the internet and any subsequent ones are WiFi Extenders as there is no need for routers after you have the first one set up.

    For some idea of what is involved try looking here for information about Directional Areials

    http://www.simplewifi .com/antennabasics.html?sl=EN
    remember to remove the space from between simplewifi and the .com for a working link.

    Col

    +
    2 Votes
    robo_dev

    For a point-to-point WLAN bridge, it is possible with the right antennas and clear line-of-sight to go literally miles. I think the world record is something like 27 miles between two mountain-tops somewhere in South America.

    For an Access Point (or WLAN router), it is important to remember that it is a two-way radio link. So even if you have some unbelievably high-gain transmit antenna, the return signal from the client has to cover the same distance. Yes, a high-gain antenna will pick up faraway signals better, but there's no way the tranmitter/antenna in an iPhone, for example, will work over any significant distance.

    Keep in mind, by the way, that the antenna gain and radio output power is regulated by local law. So in the US, for example, WiFi is typically 100mW but the effective radiated power (ERP) can be pumped up to something like 10W ERP using a particularly high-gain antenna, while 4W ERP is the legal limit.

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    0 Votes
    theaceofpsade

    Considering the structure is an educational institution and Students will be connecting to a central wireless access point which will be a wireless router connected to a server. Also, considering that Building is multi floored, has classrooms, boardrooms and Students should be able to connect to the access point from their classrooms using Mobile devices. The idea is to have an Intranet. what are the possible network solutions for this. How can this scenario be implemented

    +
    0 Votes
    jqbecker

    OK, you need to really describe the size, shape, construction of the building(s). You mention "access point" as if a single AP will handle the traffic. I can tell you right now that is never going to work. You have to think in terms of multiple access points spread throughout the building(s).

    A 100% wireless network is most likely not possible. You will find you need to run cable to the remote AP's for best performance. If you try for 100% wireless, it will be one of two results: 1) Not going to work at all, [or] 2) not going to work well.

    I suggest working with a local WiFi vendor who has experience in doing large-scale projects such as this.

    +
    2 Votes
    OH Smeg

    But you need a Optical Fiber Backbone with WiFi Access Points on every floor and in every building. You may require more than 1 WiFi Access Point per floor depending on the construction of the building and the number of people who are expected to be using the system.

    That should give you a good starting point if nothing else.

    Col