Network delay

Short description: Time required for data to traverse a network

Graphical depiction of contributions to network delay

Network delay is a design and performance characteristic of a telecommunications network. It specifies the latency for a bit of data to travel across the network from one communication endpoint to another. You are invited to add it here. It is typically measured in multiples or fractions of a second. Delay may differ slightly, depending on the location of the specific pair of communicating endpoints. Engineers usually report both the maximum and average delay, and they divide the delay into several parts:

• Processing delay – time it takes a router to process the packet header
• Queuing delay – time the packet spends in routing queues
• Transmission delay – time it takes to push the packet's bits onto the link
• Propagation delay – time for a signal to propagate through the media

A certain minimum level of delay is experienced by signals due to the time it takes to transmit a packet serially through a link. This delay is extended by more variable levels of delay due to network congestion. IP network delays can range from a few milliseconds to several hundred milliseconds.

See also

• Age of Information
• End-to-end delay
• Lag (video games)
• Latency (engineering)
• Minimum-Pairs Protocol
• Round-trip delay

References

• Impact of Delay in Voice over IP Services, http://www.telchemy.com/appnotes/Telchemy_Impact_of_Delay.pdf, retrieved 2018-10-31 
• Internet Delay Space Study at Rice University, http://www.cs.rice.edu/~eugeneng/papers/IMC06.pdf, retrieved 2018-10-31