Retransmisj

Retransmisj is a term used to describe the act of transmitting content again after its initial transmission. It is commonly used in telecommunications and broadcasting to increase reliability, extend coverage, or recover from transmission errors. The concept spans several layers, from physical signal repetition to higher-level data resends.

In broadcasting and radio, retransmisj often involves repeaters or relays that receive a signal and re-broadcast it at a higher power or different frequency to reach distant receivers. This form of retransmission can help overcome terrain, interference, or atmospheric conditions and is a standard practice in television, radio, and satellite networks. Licensing and ownership rights may apply to retransmitted content.

In data networks, retransmisj is implemented through automatic repeat request protocols or application-level retry mechanisms. When a packet or segment is not acknowledged or is detected as corrupted, the sender resends it. Common approaches include TCP retransmission (ARQ), Go-Back-N, and Selective Repeat, each balancing speed, bandwidth, and latency.

In streaming and content delivery, selective retransmission can occur in multicast or reliable transport modes, often augmented by forward error correction or caching. Retransmisj decisions affect latency, quality of service, and network load, requiring careful protocol design and network management.