DECT NR+ Multi‑Hop / Mesh Networking Support in DECT NR+ (nRF9151, mfw‑nr+_nrf91x1_2.0.0)

[ErMaqsood]

Hi everyone,

I’m working with three nRF9151 DKs to evaluate DECT NR+, and I’m trying to understand what level of multi‑hop or mesh networking support currently exists in modem firmware mfw‑nr+_nrf91x1_2.0.0 (MAC+PHY).

Point‑to‑point communication is already working using the hello_dect sample (NCS v3.3.0‑preview2).

Setup

• Hardware: 3× nRF9151 DKs
• SDK: nRF Connect SDK v3.3.0‑preview2
• Modem Firmware: mfw‑nr+_nrf91x1_2.0.0 (MAC+PHY)
• Sample Used: hello_dect PHY sample (point‑to‑point is working)

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What I Want to Build

A simple 3‑node chain:

[Leaf 1 (PT)]  [Relay / Router (FT)]  [Leaf 2 (PT)]

The FT node should receive traffic from PT‑1 and forward it to PT‑2.

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My Questions

1. Is multi‑hop or mesh supported today?

• Does the current DECT NR+ MAC layer provide relay, forwarding, or multi‑hop capabilities?
• Or is the expectation that all forwarding logic is implemented at the application level?

2. Future support

• Is mesh or multi‑hop routing on the roadmap for DECT NR+ on the nRF91x1 platform?

3. How should addressing and forwarding be handled?

If multi‑hop must be done manually:

• What is the recommended way for the FT to map packets between PT‑1 and PT‑2?
• Should routing be based on:
  • Short Addresses?
  • Link‑local IPv6 addresses?
• Does the MAC API provide any discovery or routing helpers?

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If anyone has experience with DECT NR+ multi‑hop or knows the firmware capabilities/limitations, I’d really appreciate your insights.

Thanks!

Maqsood Ahmed

[Øyvind]

Hello! I have been assigned you ticket and will have to discuss the issue with our DECT developers. I hope to have an answer within 3 business days. 

Kind regards,
Øyvind

[TVDB]

I am also looking into mesh networks making use of DECT NR+, and if I understand the documentation correctly RD2 in this case would need to be configured as FTPT, is that correct?

[Aadne]

Could you also ask whether an implementation of FTPT on the modem is possible in the nearest future? We are currently writing a masters involving experiments on a full DECT NR+ network, and want to include a relay if possible. Not meaning to press, just wondered if it is something that is currently worked on.

[Lauri Piikivi]

Hi,

Mesh networking is currently not supported on the Nordic implementation. We can not give any schedule at this time. There are partner stacks, or you can take a look at the offering in https://github.com/Opener-Initiative for the open source stacks there.

[TVDB]

so both mesh-networks and multihop networking are not possible yet?
is point to multi-point possible? or only point to point.

thank you in advance for your awnser!