What is Flow Specification?

flow specification

Flow Specification and its Functionality

Traffic Shaping can be made more effective by making the sender, receiver and the network to agree on one specific pattern of transmission. Such specific pattern or specific transmission is called ‘Flow Specification’.

Traffic Flow specification is a data structure which describes about the services desired and the quality of transmission being offered. The following are the characteristics of input.

  • Maximum Packet Size: It tells about the size of the packets in bytes.
  • Token Bucket rate: The number of bytes will be put in the token bucket per second.
  • Token Bucket Size: The size of the bucket in bytes
  • Maximum Transmission Rate: It is the maximum number of bytes a host can transmit per second in any condition.

Now the services desired for traffic flow specification are explained below.

  • Loss Sensitivity: It indicates the maximum acceptable loss rate in bytes. In the sense that the number of bytes loss up to which there will be no affect on transmission flow.
  • Loss Interval: It indicates the maximum interval between each packet loss. It is measured in µsec.
  • Burst Loss Sensitivity: It tells how many consecutive lost packets can be tolerated.
  • Maximum Delay Noticed: It describes about hoe long a packet can be delayed without the application notice. It is also measured in µsec.
  • Maximum Delay Variation: It is the amount of variation in the End-to –End packet transit time.
  • Quality of Guarantee:  It indicates whether or not the application is up to the standard. If it meets all the characteristics, then the application is a quality one for flow specification.

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