2 km point to point HELP !

RouterOS Wireless Networking
1

Hello everybody,

I need suggestion / help with my point to point link. Currently I have around 22 mbit Tx / 10 mbit Rx connection with this link, but when I watching streaming media like video connection is not stable, ping increasing. Whats best configuration for this link ?

First of all, I have 2 km distance and I am using 29dBi 5ghz dual dish antenna for both side (see attachments) and Mikrotik RB911G-5HPacD - AR9888 wireless cards for both side.

I have -40/-41 Tx/Rx signal

My configuration at [A] side (getting internet from this side) ;
Pictures of config [A] side
http://postimg.org/gallery/329bwxaam/

0 R name=“wlan1” mtu=1500 mac-address=4C:5E:0C:6E:86:83 arp=enabled
interface-type=Atheros AR9888 mode=bridge ssid=“myconnection”
frequency=5300 band=5ghz-a/n channel-width=20/40mhz-Ce
scan-list=5300-5500 wireless-protocol=nv2 vlan-mode=no-tag vlan-id=1
wds-mode=dynamic wds-default-bridge=bridge1 wds-ignore-ssid=no
bridge-mode=enabled default-authentication=yes default-forwarding=yes
default-ap-tx-limit=0 default-client-tx-limit=0 hide-ssid=no
security-profile=default compression=no

My configuration at side ;
Pictures of config side
http://postimg.org/gallery/1gj6guwfw/\

0 R name=“wlan1” mtu=1500 mac-address=4C:5E:0C:6E:86:8D arp=enabled
interface-type=Atheros AR9888 mode=station-wds ssid=“myconnecton”
frequency=5300 band=5ghz-a/n channel-width=20mhz scan-list=5300-5500
wireless-protocol=nv2 vlan-mode=no-tag vlan-id=1 wds-mode=disabled
wds-default-bridge=none wds-ignore-ssid=no bridge-mode=enabled
default-authentication=yes default-forwarding=yes default-ap-tx-limit=0
default-client-tx-limit=0 hide-ssid=no security-profile=default
compression=no

Any help would be appreciated, If anybody can share time via skype or email would be perfect :slight_smile:

Regards !

2

Set power of card lower
Other mhz 5800 example
And try diferent protocol nv2, 802.11
And test with bandwith traffic

3

It’s too much power. You need to attenuate the transmitters. Use regulatory domain settings relevant to your country and set the correct antenna gain.

4

Thank you for answers, you both said that i need to decrease power, how can I do that ?

Do I need to enter antenna gain 29dBi ? And my TX power settings set to default, how can I understand correct value for power ?

5

Also set band to 5Ghz-only-N frequency mode to “regulatory domain” and channel-width to 20mhz
Then do frequency scan to find free frequency.

6

**Hello. I am not an expert, but i think 29 dBi is too much for 2 km. I know this dish has very narrow beam.
How much speed do you need ?

Some tips:

-You should achieve -50-60 dBm signal strenght, you need to scan and try to find a " free " channel, but if you are a noisy environment this is a really nightmare
\

  • You should decrease the tx-power: i think with this dish you do not need high power and according to my experience little tx power with high gain dishes a better combination

    -You can use superchannel mode

    According to the calculator: with 10 mw tx power you should achive in normal conditions -46 dBm signal strenght.**
7

Actually I am currently 20mbit connection, as much as I can but need stable one, 50 is good

8

I read about 100 Mbit/sec with 802.11 AC with 20 Mhz channel width.
So you should get at least this speed or more on 2 km.

You can play with the settings. First you need to achieve good signal strenght. Around -50 and between -60 dBm.
Your signal strenght is too much. This 29 dBi antenna is good but unnecessary for this short distance. An advantage of this dish is the narrow beam.

9

How can I decrease power ? only changing frequency to regulatory-domain is enough ?

10

Actually the bigger the antenna gain the better, regardless of distance.

The whole concept is that you emit as less as you can (so at minimum tx-power) but you gain as much as you can by using a high gain antenna.
The end result is more stable link.

This is the best practice. It will not only make any link better (always assuming clear LOS) but it will emit less ‘noise’ to any other links around you.

The fact that the beam is narrow is good. The narrower, the better.
What most people confuse is that Wifi is bi-directional. So having narrow beams on both ends not only you produce less noise on the band (for other links around you) but you also listen less from around you. This means that the narrower the beam, the less unwanted noise your receiver will get.
Surely it will make it more difficult to align but all good wifi links require some amount of effort.

Wifi is not plug and play!