WIreless Network In Tunnel

RouterOS Wireless Networking
1

Dear Sir/Madam
We are going to implement a wireless network along a tunnel to operate an inspection robot. The tunnel has size limitation (1.5m * 2.5m * 12000m) and experiments have shown that a couple of wireless devices (SXTsq 5 High Power) can communicate perfectly when they are placed 450m apart. We have to use a number of such wireless links along the tunnel to cover all the inspection area.
our design includes 80 wireless devices to be connected ad shown in the attached figure. Both devices are back-to-back connected by a network cable however these back-to-back devices will communicate using WDS mode with the next and previous of couples. To expand the operating range, 40 couples of devices will be used.
The inspection robot will convey two wireless devices (SXTsq 5 High Power) which will operate in station mode. The maximum speed of the inspection robot is 1m/s and it is supposed to live stream full HD videos.

The question is:
1- Is there any associated data transmission delay (or interruption) concerning a large number of devices in use?
2- Is there any better solution to implement such a wireless network for the described problem?

  • All devices are SXT5sq 5 High Power
  • Almost 80 wireless must be used because of gemometric and positioning limitations.
  • The robot carriage conveys two wireless devices that are back-to-back connected by a network cable which are wirelessly connectet to fixed devices (shown in the ceiling of the tunnel)
  • Each couple of wireless devices are connected are via network cable.
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2

I do not believe that there are enough wireless channels to operate 80 non-overlapping wireless channels. While using WDS may seem like a fine idea I wish to urge caution. Each wireless hop halves the effective throughput. Also, SXT devices do not have the ideal broadcast radiation pattern for this application. I believe your system will also be highly expensive.

3

Thanks for your opinion,
I only use two non overlap channels for all my sxtsq5 pairs. Sxtsq5 paires with even label go to the first channel and the ones with odd labels go to the other channel and each sxtsq5 pair make its own WDS link and do not have any wireless link to the next sxtsq5 pair, instead it is linked by a network cable and so in this design there is no overlap channel for each wireless links.