stream reservation protocol (802.1Qat) (SRP)

In network technology, latency is negatively affected by congestion. Congestion and collisions occur when several services are transmitted simultaneously in the network and the available buffer resources overflow. In such cases, even priority controls do not provide a remedy. For these constraints, the IEEE 802.1Qat working group has standardized the Stream Reservation Protocol ( SRP), which can be used to dynamically reserve transmission resources and guarantee latency.

The Stream Reservation Protocol (SRP) is a dynamic control protocol with which a transmission path with guaranteed transmission characteristics can be established between the communication participants Talker and Listener. The reservation process takes place in several stages: First, a domain is established. In this process, the talker announces a stream or streams and specifies the quality of service requirements. Bridges route the announcement through the network. The listener(s) register for the stream. To do this, the listeners send a sign-on message that is forwarded by the bridges to the talker.

The SRP protocol is used in audiovideobridging( AVB) and professional audio products. For example, in theaters, amusement parks, train stations, airports, and even open-air concerts. Furthermore, it is used in infotainment in automotive technology.