Download File - Computer Networks & Information Security
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Congestion Window size (segments) 14 12 10 8 6 Slow start 4 2 0 Congestion avoidance 0 1 2 3 4 5 6 7 8 Time (round trips) Slow start threshold Example assumes that acks are not delayed 340
Congestion Control On detecting a packet loss, TCP sender assumes that network congestion has occurred On detecting packet loss, TCP sender drastically reduces the congestion window Reducing congestion window reduces amount of data that can be sent per RTT 341
- Page 289 and 290: Distributed Fair Scheduling DFS us
- Page 291 and 292: Fairness in Multi-Hop Networks Not
- Page 293 and 294: Balanced MAC degree of node j p_ij
- Page 295 and 296: Balanced MAC Results show that it
- Page 297 and 298: Estimation-Based Fair MAC Fair sha
- Page 299 and 300: Proportional Fair Contention Resolu
- Page 301 and 302: Sender-Initiated Protocols The pro
- Page 303 and 304: Using Receiver’s Help in a Sender
- Page 305 and 306: Receiver-Based Adaptive Rate Contro
- Page 307 and 308: Capacity and MAC Protocols The MAC
- Page 309 and 310: Energy Conserving MAC Since many m
- Page 311 and 312: A Power Aware Multi-Access Protocol
- Page 313 and 314: PAMAS PAMAS uses a control channel
- Page 315 and 316: Another Proposal in PAMAS To avoid
- Page 317 and 318: UDP on Mobile Ad Hoc Networks 317
- Page 319 and 320: UDP Performance Several relevant s
- Page 321 and 322: UDP Performance Difficult to ident
- Page 323 and 324: Overview of Transmission Control Pr
- Page 325 and 326: Transmission Control Protocol (TCP)
- Page 327 and 328: Cumulative Acknowledgements A new
- Page 329 and 330: Window Based Flow Control Sliding
- Page 331 and 332: Window Based Flow Control Congesti
- Page 333 and 334: How does TCP detect a packet loss?
- Page 335 and 336: Retransmission Timeout (RTO) calcul
- Page 337 and 338: Fast Retransmission Timeouts can t
- Page 339: Congestion Avoidance and Control S
- Page 343 and 344: Congestion window (segments) 25 20
- Page 345 and 346: ssthresh = Fast Recovery min(cwnd,
- Page 347 and 348: Slow-start Congestion avoidance F
- Page 349 and 350: Performance of TCP Several factors
- Page 351 and 352: Random Errors May Cause Fast Retran
- Page 353 and 354: Random Errors May Cause Fast Retran
- Page 355 and 356: Random Errors May Cause Fast Retran
- Page 357 and 358: Sometimes Congestion Response May b
- Page 359 and 360: Burst Errors May Cause Timeouts If
- Page 361 and 362: Impact of Transmission Errors TCP
- Page 363 and 364: This Tutorial This tutorial consid
- Page 365 and 366: Mobile Ad Hoc Networks Mobility ca
- Page 367 and 368: Impact of Multi-Hop Wireless Paths
- Page 369 and 370: Ideal Throughput f(i) = fraction o
- Page 371 and 372: Impact of Mobility 20 m/s 30 m/s Id
- Page 373 and 374: Actual throughput But not always
- Page 375 and 376: mobility causes link breakage, resu
- Page 377 and 378: B C A Why Does Throughput Improve?
- Page 379 and 380: Network feedback How to Improve Thr
- Page 381 and 382: Actual throughput Performance Impro
- Page 383 and 384: Issues Network Feedback Network kn
- Page 385 and 386: To Cache or Not to Cache Average sp
- Page 387 and 388: Issues To Cache or Not to Cache Ca
- Page 389 and 390: TCP Performance Two factors result
Congestion Window size<br />
(segments)<br />
14<br />
12<br />
10<br />
8<br />
6<br />
Slow start<br />
4<br />
2<br />
0<br />
Congestion<br />
avoidance<br />
0 1 2 3 4 5 6 7 8<br />
Time (round trips)<br />
Slow start<br />
threshold<br />
Example assumes that acks are not delayed<br />
340
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