Ensuring Continuity of Office IT Infrastructure Operation in Crisis Situations
DOI:
https://doi.org/10.47839/ijc.25.2.4656Keywords:
blackout, office network, mesh relay, dual-WAN, GPON, Starlink, low-power edge server, LiFePO₄,, energy management, fault tolerance, Zero TrustAbstract
Blackouts have transformed office electronic communications into a system in which power loss immediately causes degradation of access to documents, services, and coordination channels. The purpose of this study is to substantiate and validate a network reconstruction architecture capable of maintaining business-critical functions during prolonged outages.
A comprehensive solution is proposed based on a self-healing Mesh topology, a dual-WAN configuration with primary GPON access and Starlink backup, and a local solid-state low-power edge server providing DNS/DHCP, authentication, file services, and event logging (minimal SIEM/IDS).
The power subsystem is implemented using a 12 V LiFePO₄ battery with a Battery Management System (BMS) and a simple timer mechanism for disconnecting non-critical loads during off-hours, thereby reducing average power consumption and depth of discharge.
Evaluation metrics include autonomy duration, WAN failover time, availability of local services, and energy consumption. Calculated scenarios and experimental tests were conducted for GPON failures and individual Mesh node outages.
For a 2000 Wh battery, the projected autonomy is 22.99 hours in daytime mode and 31.75 hours in nighttime mode, with energy savings of 240 Wh during a 10-hour disconnection of Group B loads. Failover to Starlink required 10–20 seconds, while Mesh route reconstruction took less than 3 seconds.
The practical contribution lies in the load-segmentation rules (Groups A/B), hop-count minimization, and preparation for future Zero Trust segmentation of critical services. Unlike UPS-centric approaches (“power everything”), the proposed design manages priorities: network core, routing, VPN, and local data remain available, while peripheral consumers are disconnected in a controlled manner.
The study demonstrates reduction of single points of failure and provides recommendations for rapid communication recovery in small and medium-sized offices. Additional requirements for logging and basic segmentation are introduced to simplify operation and resilience auditing in crisis conditions.
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