[GSOC’21] Radio Ressource Management with IEEE 802.11v

The goal of this project is to create a light-weight user-space daemon to enables IEEE 802.11v client handovers between OpenWrt APs.

About me

My name is Valerius Begau and I´m in my second year studying Bachelor of Internet-Technology and Applications at the University of Applied Sciences Nordhausen (Germany). I’m a big fan of open source because I think it’s a quicker and more efficient way to solve a problem. I am very happy to be part of the GSoC 2021 and hope to work together well.

Freifunk Client Steering (ff_steer)

Current Access network lack fast client handovers and roaming. Lately the client handover daemon “usteer” was released and focuses on none-standard client handovers by disassociating client and manage an intra AP communication to enable roaming. More recently the DAWN project uses a decentralized WiFi controller approach to disconnect clients based on RSSI measurements and statistics. Apart from this the IEEE 802.11v amendment is very promising. It allows a better handover of 802.11v enabled clients between APs. Instead of disassociating, the client can be guided to the next AP using a BSS TMR frames.

The procedure

  1. distribute the neighbor hearing map between relevant WiFi APs within a L2 domain
  2. manage client roaming with a new OpenWrt UBUS based interface
  3. validate and evaluate ff_steer with experiments

current status

I must say to my regret that due to many exams at the university I could not finish the project in the prescribed period. However, since I have posted my thoughts and ideas for implementation here, someone who is interested in this is welcome to pursue this further.

You can find my approach to Client Capability Measurement here

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