congestion; congested state
Technical term used in telecommunications and computing to describe a network or system overloaded with traffic.
When the network becomes congested, communication speed drops significantly.
The server fell into a congested state and stopped responding.
混雑 is a general term for physical crowding or congestion (e.g., traffic, places), while 輻輳状態 is a technical term specifically for network or system congestion.
Compound of 輻輳 (ふくそう, 'convergence' or 'congestion') and 状態 (じょうたい, 'state'). 輻輳 itself is a technical term derived from the idea of spokes converging at a hub, used in networking to describe traffic convergence leading to congestion.