![]() In this case, the router has no other option than to simply discard excess packets. Since the router has a finite amount of buffer memory to hold the queue, a router which receives packets at too high a rate may experience a full queue. The router queue of packets waiting to be sent also introduces a potential cause of packet loss. The longer the line of packets waiting to be transmitted, the longer the average waiting time is. The maximum queuing delay is proportional to buffer size. ![]() This formula can be used when no packets are dropped from the queue. The average delay any given packet is likely to experience is given by the formula 1/(μ-λ) where μ is the number of packets per second the facility can sustain and λ is the average rate at which packets are arriving to be serviced. The speed at which the contents of a queue can be processed is a function of the transmission rate of the facility. Īs a queue begins to fill up due to traffic arriving faster than it can be processed, the amount of delay a packet experiences going through the queue increases. Delay can also vary from packet to packet so averages and statistics are usually generated when measuring and evaluating queuing delay. If packets arrive faster than the router can process them (such as in a burst transmission) the router puts them into the queue (also called the buffer) until it can get around to transmitting them. A router can only process one packet at a time. When packets arrive at a router, they have to be processed and transmitted. This term is most often used in reference to routers. In a packet-switched network, queuing delay is the sum of the delays encountered by a packet between the time of insertion into the network and the time of delivery to the address. In a data network, queuing delay is the sum of the delays between the request for service and the establishment of a circuit to the called data terminal equipment (DTE). Queuing delay may be caused by delays at the originating switch, intermediate switches, or the call receiver servicing switch. In a switched network, queuing delay is the time between the completion of signaling by the call originator and the arrival of a ringing signal at the call receiver. In telecommunication and computer engineering, the queuing delay or queueing delay is the time a job waits in a queue until it can be executed. ( May 2022) ( Learn how and when to remove this template message) Please help improve it to make it understandable to non-experts, without removing the technical details. This article may be too technical for most readers to understand. ![]()
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