[Cake] "Fi-Wi is a new forwarding plane for wireless" - Bob McMahon

[Frantisek Borsik <frantisek.borsik@gmail.com>]

Interesting food for though:

"Fi-Wi is a new forwarding plane for wireless.

IP routing maps destination prefix → next hop. Ethernet bridging maps
learned MAC → port. Fi-Wi maps 802.3 aggregates (A-MPDU) → (RRH, orthogonal
slot), where an orthogonal "slot" spans time, carrier frequencies, and
eigenspaces.

Current 802.11 needs a forwarding plane. CSMA/CA via APs is collision
avoidance — delivery is emergent, no global state, no forwarding decision.
Fi-Wi replaces that with centralized decision-making running over
distributed Remote Radio Heads, connected via PCIe-over-fiber as
cache-coherent, switched DRAM. Every RRH's queue state, channel state, and
TSF clock visible to the scheduler in a single memory domain.

Same architectural leap that IP made for L3 and Ethernet made for L2. A new
industry serviced by routers. Another new industry serviced by switches.
Fi-Wi isn't a new product, it's a third forwarding plane, and an industry
yet to be built.

Umber Networks. The first company building Fi-Wi."

https://www.linkedin.com/feed/update/urn:li:activity:7460693793390968832/

All the best,

Frank

Frantisek (Frank) Borsik


*In loving memory of Dave Täht: *1965-2025

https://libreqos.io/2025/04/01/in-loving-memory-of-dave/


https://www.linkedin.com/in/frantisekborsik

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frantisek.borsik@gmail.com