kontrolrammer

Kontrolrammer is a term used in Danish- and Norwegian-language technical literature to describe frames in a digital communication system that carry control information rather than user payload. In English-language sources the term is typically written as control frames.

Kontrolrammer serve to coordinate transmission and manage various aspects of communication, such as addressing, sequencing, error handling, flow control, and access to shared media. They help ensure reliable data transfer and efficient use of the communication channel. Depending on the protocol, control frames may be exchanged at different layers, most commonly at the data-link or network layer.

A kontrolramme generally contains a header with a frame type or control field, addressing fields, and a sequence or control flags. The payload portion may carry a specific control command, a request, an acknowledgment, or sometimes no payload at all. Some protocols treat frames as either data or control, while others embed control information within frames that also carry data.

Examples of mechanisms described as kontrolrammer in various systems include Ethernet flow-control frames (Pause frames), CAN bus frames used for acknowledgments or remote requests, Fibre Channel signaling frames, and Wi-Fi management frames that maintain network state. The exact format and responsibilities of kontrolrammer vary by protocol and implementation.

Etymology and usage: The term is primarily used in Danish and Norwegian technical literature. In English-language documentation, terms such as control frames or control-plane frames are more common. See also: Data frame, Frame, Protocol, Control plane, Flow control.