Network throughput  is the rate (in bps- bits per sec or  pps - packets per second) at which packets or bits are successfully delivered over a n/w channel. So, we can sum the packets received by all nodes to calculate the value, for a small network or network segment.

i want clear answer

i mean, what is the best way to calculate "throughput " to get high Accuracy result. suppose work on small network .

thanks, sir

I just have read, high valueble discussion i found.

Thanks for all.

dear sir

There are several ways to measure throughput (instantaneous or average) in a wired or wireless network using network simulators .So,what I mean by my question which is the best way to do that.

@Peter Breuer :thanks for simplifying the model so nicely. Sum of packets (may be bits/ bytes) received by all nodes during an interval in an networking environment under study can be considered to be the throughput of that network. 

Network throughput  is the rate (in bps- bits per sec or  pps - packets per second) at which packets or bits are successfully delivered over a n/w channel. So, we can sum the packets received by all nodes to calculate the value, for a small network or network segment.

Thanks, minute to answer and write what is true. But, it's still not satisfying. any researcher can measure the throughput in the network. so, who to check the accuracy of the result and which is best to calculate total or one-by-one.

In Wireless communication !!!

System throughout is defined as the sum of individual throughput that . It

indicates the meaningful data rate of the system:

Basic formula:-

Throughput (bits/sec)= sum (number of successful packets)*(average packet_size))/Total Time sent in delivering that amount of data.

Thanks for the answer. the question for measuring the the throughput is Absolutely correct. But, it is not specifically for wireless communication. it may be used by other network enviroment like wired network.

let us say that the network sent 3200 packets , recived 3000 packets and the packet size is 1024 bytes.

What is the throughput?

and the Time

How about if we ignored the time?

.

"throughput" by itself does'nt mean much when it comes to measurement : throughput is a rate (number of bytes / transmission time, through a given well-specified network interface) computed on some application-relevant time window

.

at the bare metal level, the instantaneous throughput is the medium throughput when a packet is flowing, zero otherwise ; this definition of throughput will not make sense at an application level where the relevant time-scale might be a minute or a hour

.

if the application-relevant time-scale is not defined, no useful measurement is possible in practice

.

now, for theoreticians, multi-scale decomposition of the throughput (that is, gathering all the information at all time-scales) is possible and indeed quite informative ... but admitedly not very useful in practice ; if interested, please see

http://conferences.sigcomm.org/sigcomm/1998/tp/paper04.pdf

.

Dear Abdullah Ali Bahattab

in some case may be the time is non- measured or not available, then the result of throughput is inaccurate.

Dear Peter Breuer

thanks for the valuable answer.

every one konw the basic behavior of computer network like generate ,send, route, receive packets or data rate.Also, taken example for node send rate (x) and receive (x-y) is Very likely to fall due to the B.W. channel or losses in network router (Queue).

The point I want to get is the perspective of researchers and their experience in measuring QoS metrics shch as throghput,Knowing if there are other ways of measuring standards or giving ideas for more than one case and how to calculate each case mathematically and practically with the most accurate results

Best Regards

Many thanks Dr. Ali

Dear Fabrice Clerot

Thanks for the valuable answer, wich content advance information for researchers and readers.

Dear Peter Breuer

Basically, the mathematical equation used to calculate (after measure the packets or data rate) the throughput in each case is partially different, for example the equation used to calculate total throughput in network is not the same equation used for average throughput in the same network. Similar to that difference between throughput in specific path between node (x) and node (y) with throughput in one node (z) Instantaneous.

Ordinarily, the aim of answering question is to write a clear and useful sentence for readers and researchers in order to reach the goal of question or discussion. Knowing that it is better to strengthen the answer by reference or script.

Best Regards