Congestion control concerns controlling traffic entry into a telecommunications network, so as to avoid congestive collapse by attempting to avoid oversubscription of any of the processing or link capabilities of the intermediate nodes and networks and taking resource reducing steps, such as reducing the rate of sending packets.
Questions tagged [congestion-control]
105 questions
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Python nonblocking sockets and reliable UDP
For a graduate-level project, I'm being asked to create a reliable UDP implementation in Python. I have experience with socket programming in Python, but mostly TCP or "fire and forget"-type UDP stuff. I essentially have to create UDP with TCP…
user2963501
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Why must endpoints manage conversions between bytes sent and received TSNs sent and received in SCTP congestion control?
As stated in RFC 3286:
"...endpoints must manage the conversion between bytes sent and received and TSNs sent and received, since TSN is per chunk rather than per byte".
How does this affect the congestion control algorithm?
Benny
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2 answers
TCP - congestion avoidance
I am trying to understand TCP congestion avoidance mechanism, but I don't understand one thing:
TCP congestion avoidance is per flow or per link?
In other words: there are 2 routers A and B
A is sending B two TCP flows - when one TCP flow detects…
Igor
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1 answer
TCP Slow start window size
I am revising for a networks exam and I am not sure of the answer to the following:
Consider the effect of using slow-start on a link with a 10ms round-trip time
and no congestion. The receive window is 24KB and the maximum segment
size is 2KB. How…
sam
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Tcp congestion avoidance at every node
Is it possible for each node connected to the same router to implement different congestion avoidance technique? Also, is it possible to completely disable congestion avoidance in a node connected to a router. Thanks.
NAHEEM OLANIYAN
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Does network congestion occur when we exceed our network capacity?
I have followed a tutorial where it has been said that network congestion will occur when we overload our network or our maximum network capacity. In this case they referred to network capacity as our network bandwidth (maximum throughput).
So then…
duh ikal
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2 answers
How would I write this code to make it read a file that has an unknown amount of lines?
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
public class Process_TCPProbe_dm{
public static void main(String[] args) throws IOException {
…
Danyelle
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1 answer
How to simulate TCP (Flow Control and Congestion Control) in java?
I'm trying to simulate flow control and congestion control in java. I have a simple code with a TCP-Client and TCP-Server, but I need to separate it into two parts: Flow Control and Congestion control. Then, I need to capture TCP packets in…
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1 answer
how to calculate the loss event rate p in TFRC(tcp friendly rate control) when no packet loss?
When there is packet loss , I know the method to calculate the p (I read in the RFC document).
But when there is no packet loss , how to calculate it? The document show nothing about it.
If the loss event rate p is zero, the denominator of equation…
usrmqj xv
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Is this congestion control method for UDP feasible / sound?
Sender sends the data.
Receiver waits a couple of seconds and then calculates the throughput rate / s
Receiver sends the rate at which its receiving packets (bytes / s) to sender
Sender calculates its rate of sending packets
If the rate of sender…
Tom
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2 answers
Several questions regarding tcp behavior under congestion
The tcpdump log put below is copied from an test I was running recently. At the beginning everything went very smoothly. Then the client side finally overwhelmed a router, then a lot of packets [# - 6176] get dropped(never see ACK for them). Then at…
xwz7611
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2 answers
Queue Length really affect Latency in DCTCP?
DCTCP is a variant of TCP for Data Center environment. The source is here
DCTCP using ECN feature in commodity switch to limit queue length of buffer in switch around the threshold K. Doing so, packet loss is rarely happen because K is much smaller…
Tai Nguyen
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1 answer
How to count packets that is ECN marked at switch
2 hosts connect through a switch with link1, link2 correspondingly.
H1-------------------Switch---------------------H2
BW1 B/K BW2
Switch has buffer B (size in packets) and ECN supported. It will mark packets when buffer queue…
Tai Nguyen
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1 answer
TCP Congestion Window Size Too Large?
I try to emulate a network comprised of 2 host and 1 switch using Mininet.
One host is a sender, sending packets continuously to the other host (receiver) by using iperf…
Tai Nguyen
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1 answer
What is Bandwidth Consumption in TCP vs UDP socket?
I know there are many similar questions to my question but I need a clear answer regarding my question.
Since we all know, TCP is connection-oriented while UDP is connectionless. If on the same network, I make two UDP sockets (server, client) and…
Khubaib Ahmad
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