Creating a high speed mesh by using dual radio nodes

  • During an early demonstration of MESHdesk the first question that was asked: Does it supports dual radio nodes?.
  • The answer at that time was not yet, perhaps in the future….
  • Fast forward to today and we are proud to say that MESHdesk does indeed also support dual radio nodes.

The limitations of single radio nodes

  • Unfortunately with a mesh there is a performance knock with each hop away from the gateway node.
  • This performance knock is unavoidable even with dual radio nodes.
  • With single radio nodes there are however also the following to consider.
  • When you use single radio mesh nodes each node has two functions:
    • It has an ad-hoc connection with neighbor nodes. (This can be seen as the connecting wire between the nodes)
    • It typically also has one or more SSIDs to which clients can connect.
  • This means that each radio has to time share between these two functions.
  • Add to the mix that the mesh and SSID's are all on the same channel and it does not take a genius to see why people will ask Does this system supports dual radio nodes

Dual radio node alternative

  • When we have dual radio nodes we can create a mesh in the following way.
  • Use the 5G radio for the ad-hoc connection with the neighbor nodes.
  • Use the 2.4G radio for the SSIDs to which clients will connect.
  • Make sure each node's 2.4G radio is on a non-overlapping channel (1,6,11) to reduce interference.
  • Test shown that this configuration results in an increase of the throughput of nearly 3 times when compared to a mesh that consist of single radio nodes.
  • See the following diagram for an overview.