Com Vector 4 – OBBHFH

Architecture (example Bangui → Damara → Ombella)

• PtP 5 GHz radios (23–27 dBi) ~30–40 km LoS per hop.
• OpenWrt/MikroTik routers (QoS, VLAN, WireGuard VPN).
• Mini-server (RPi/mini-PC): doc cache, local messaging, LuckyBlock bundle import/export.
• Sites B/C/D on 250–300 Wc solar + 150–200 Ah battery.
• Masts 6–12 m, weatherproof boxes, surge protection, grounding.

Reference budget (4 sites) ≈ €4,240 hardware (6 radios, 4 routers, 4 RPis, 3 solar kits, masts, cables), excluding labor.

Logical layout A/B/C/D (Bangui → Damara → Ombella)

[ Site A – Bangui (hill house) ]
   Role: main node, potential Internet/4G uplink.
   L1 ~35 km (PtP 5 GHz)
                |
                v
[ Site B – Intermediate hill relay Bangui–Damara ]
   Role: cut the long distance into two comfortable hops.
   L2 ~35 km (PtP 5 GHz)
                |
                v
[ Site C – Damara (town hall / public building) ]
   Role: central political node, relay toward Ombella-Bord.
   L3 ~25–30 km (PtP 5 GHz)
                |
                v
[ Site D – Ombella-Bord (N12 × Ombella) ]
   Role: bridgehead to river installations, future extension Umba/Boali/Sibut.
      

• Each link (L1, L2, L3) ≤ 35–40 km to stay within low-cost radio capacity.
• Bangui hill is key to clear the first hop horizon.
• Damara and Ombella-Bord use small heights to clear canopy/terrain.

Roles by site

• Site A – Bangui (hill):
  • 1 PtP 5 GHz radio to Site B (~€120).
  • 1 router (OpenWrt/MikroTik) (~€80).
  • 1 Raspberry Pi 4 or mini-PC (~€100).
  • Cabling, surge, mounts (~€100).
  • Power: 220 V mains + simple UPS.
  • Acts as Internet gateway (4G/VSAT) and main “Mayors’ Assembly” node.
• Site B – Intermediate hill relay:
  • 2 PtP 5 GHz radios (to A and C) → 2 × €120 = €240.
  • 1 router (manages both links + VPN) (~€80).
  • 1 Raspberry Pi 4 (local messaging + logs) (~€100).
  • Solar kit: 250–300 Wc panel, 12 V 150–200 Ah battery, MPPT (≈ €600).
  • 6–12 m mast + mounts (~€200).
  • Weatherproof box, cables, surge (~€100).
  • Subtotal ≈ €1,320 ≈ 870,000 FCFA.
• Site C – Damara (town hall / public building):
  • 2 PtP 5 GHz radios (to B and D) → €240.
  • 1 local Wi‑Fi AP (square/town hall) (~€50–70).
  • 1 router (~€80).
  • 1 Raspberry Pi 4 (“mayors’ network” server) (~€100).
  • Full solar kit (≈ €600).
  • Mast or existing structure (~€200).
  • Cables, box, surge (~€100).
  • Subtotal ≈ €1,320 ≈ 870,000 FCFA.
• Site D – Ombella-Bord (N12 × Ombella):
  • 1 PtP 5 GHz radio to C (~€120).
  • 1 router (~€80).
  • 1 Raspberry Pi 4 (~€100).
  • Full solar kit (≈ €600).
  • Mast (~€200).
  • Cables, box, surge (~€100).
  • Subtotal ≈ €1,200 ≈ 785,000 FCFA.

Global hardware recap (Bangui → Damara → Ombella-Bord):

• PtP radios: 6 units → ≈ €720.
• Routers: 4 → ≈ €320.
• Raspberry Pi: 4 → ≈ €400.
• Solar kits (B, C, D): 3 → ≈ €1,800.
• Masts (B, C, D): 3 → ≈ €600.
• Misc (cables, boxes, surge, etc.): ≈ €400.
• Total hardware ≈ €4,240 → ~2,780,000 FCFA. With transport + labor + local margin, target 4–5 million FCFA for 4 clean, autonomous, secured sites.

Main uses

• Provide a backbone between distant communes (country, prefectures, main communes).
• Act as Internet gateway (VSAT/4G) with quotas, LuckyBlock bundle import/export.
• Support traffic of V1/V2/V3 vectors (USB/SD, MANET, K/H/S stations).
• Base for OBBDW drone corridors: each site can host a drone buffer box + takeoff/landing area.
• Offer 56k / “slow Internet” to a few households around town halls for messaging, light docs, admin services.

Software & crypto (Mayors’ Network)

• WireGuard VPN:
  • Encrypted tunnel between sites A/B/C/D.
  • Allows switching from radio transport (HFH) to physical (DW) without changing app logic.
• Internal messaging (lightweight Matrix/XMPP):
  • Text, small attachments, “Mayors’ Assembly” groups.
  • Works even if the global Internet is down, as long as the backbone holds.
• Storage/sharing: Nextcloud Pi or Syncthing for laws, forms, documents.
• Identities & signatures:
  • Each mayor has a public key managed by the local station.
  • Resolutions and votes are signed and verifiable.
  • The Bangui server only relays; it cannot alter votes.
• Monitoring (optional): light Grafana + Prometheus for uptime, battery voltage, radio link quality.

Possible network name: “Mayors’ Assembly – Ombella Network”. Each town hall is a sovereign peer in this federation.

Energy topology

• Site A – Bangui:
  • Grid 220 V + UPS. To do small inverter if needed.
  • To do Surge protection + grounding.
• Site B – Hill relay:
  • Solar 250–300 Wc, 12 V 150–200 Ah, MPPT.
  • To do Cable gauge + fuses + lightning arrestor.
• Site C – Damara:
  • Solar kit similar to B.
  • To do AC/DC split (router vs. AP).
• Site D – Ombella-Bord:
  • Solar kit similar to B/C.
  • To do Battery enclosure, airflow.