System Delay

System delay 관련 내용

  1. Delay
    1. Delay 구조

Delay


Delay 구조

지연영어설명수식
전파지연Propagation Delay1bit가 송신 NIC을 떠나서 매체를 타고 수신 NIC에 도착할때까지 걸리는 시간Propagation delay = distance between equipment(m)/speed of medium (m/s)
전송지연Transmission Delay (Serialization Delay)하나의 패킷이 NIC에서 처음부터 끝까지 완전히 전송되는데까지 걸리는 시간전송지연=패킷사이즈(bits)/전송속도(bps)
큐잉지연Queuing Delay (Beffuring Delay)  
처리지연Processing Delay  
포워딩지연Forwarding Delay(switch latency)  
패킷크기 (Byte)패킷크기 (bit)전송지연 (10MBps)전송지연 (100MBps)전송지연 (1GBps)
6451251.25.120.512
1281024102.410.241.024
2562048204.820.482.048
5124096409.640.964.096
10248192819.281.928.192
150012000120012012
거리 (km)전파속도 (광섬유)전파지연 (광섬유, ms)
12 x 10^8 m/s0.005
102 x 10^8 m/s0.05
1002 x 10^8 m/s0.5
10002 x 10^8 m/s5

E2E (End-to-End) Delay

  • E2E delay = Sender System Delay + Network Delay + Receiver System Delay

$\sum$ {Sender [Transmission + Propagation] + Forwarding + Receiver [Transmission + Propagation] }

graph TD;
    A-->B;
    B-->C;
    A-->C;
    B-->D;
    C-->D;
graph TD;
    A-->C;
    A-->D;
    A-->C;
    B-->D;
    C-->D;

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