Traffic Management for the Available Bit Rate (ABR) Service in ...
Traffic Management for the Available Bit Rate (ABR) Service in ... Traffic Management for the Available Bit Rate (ABR) Service in ...
THEN IF New TCR > TCR THEN TCR New TCR � Inter Cell Transmission Time 1/TCR� END� (* of FECN Cell processing *) Averaging Interval Averaging Interval In Cell� 6. A BECN control cell is received from some switch. IF BECN Option THEN IF Time Already Acted < Time Stamp In Cell THEN IF Load Adjustment Factor In Cell 1 THEN BEGIN END� New TCR TCR In Cell/Load Adjustment Factor In Cell� IF New TCR < TCR THEN BEGIN END� B.2 The Switch Algorithm TCR New TCR� Inter Cell Transmission Time 1/TCR� Time Already Acted Time Stamp In Cell� The events at the switch and the actions to be taken on these events are as follows: 391
1. Initialization: Target Cell Rate Link Bandwidth Target Utilization / Cell Size � Target Cell Count Target Cell Rate Averaging Interval� Received Cell Count 0� Clear VC Seen Bit for all VCs� IF (Basic Fairness Option OR Aggressive Fairness Option ) THEN BEGIN END� Upper Load Bound 1+Half Width Of TUB� Lower Load Bound 1 - Half Width Of TUB� 2. A data cell is received. Increment Received Cell Count� Mark VC Seen Bit for the VC in the Cell� 3. The averaging interval timer expires. Num Active VCs maxf P VC Seen Bit, 1g� Fair Share Rate Target Cell Rate/Num Active VCs� Load Level Received Cell Count/Target Cell Count� Reset all VC Seen Bits� Received Cell Count 0� Restart Averaging Interval Timer� 392
- Page 367 and 368: Figure 9.2: Per-class queues in a n
- Page 369 and 370: which arises is where the rate calc
- Page 371 and 372: 9.2 The ERICA Switch Scheme: Renota
- Page 373 and 374: The unknowns in the above equations
- Page 375 and 376: Figure 9.9: Two methods to measure
- Page 377 and 378: 9.4 VS/VD Switch Design Options 9.4
- Page 379 and 380: # VC Rate VC Input Rate Input Rate
- Page 381 and 382: 8 uses source rate measurement, we
- Page 383 and 384: The allocated rate update and the e
- Page 385 and 386: sources in chapter 6. We expect the
- Page 387 and 388: con guration mentioned in the table
- Page 389 and 390: can be very di erent for di erent V
- Page 391 and 392: CHAPTER 10 IMPLEMENTATION ISSUES At
- Page 393 and 394: With an enhanced UBR service, appli
- Page 395 and 396: 2. Some switch schemes have a proce
- Page 397 and 398: 4. Large legacy switches have a pro
- Page 399 and 400: section 9. Further, WAN switches wo
- Page 401 and 402: CHAPTER 11 SUMMARY AND FUTURE WORK
- Page 403 and 404: good transient performance. Since r
- Page 405 and 406: variant background tra c conditions
- Page 407 and 408: APPENDIX A SOURCE, DESTINATION AND
- Page 409 and 410: 7. After following behaviors #5 and
- Page 411 and 412: set the QL and SN elds to zero, pre
- Page 413 and 414: d) VS/VD Control: The switch may se
- Page 415 and 416: 5. Setting of other parameters at V
- Page 417: 4. The averaging interval timer exp
- Page 421 and 422: THEN IF (OCR In Cell Fair Share Rat
- Page 423 and 424: APPENDIX C ERICA SWITCH ALGORITHM:
- Page 425 and 426: Number Active VCs In Last Interval
- Page 427 and 428: IF (NOT(Averaging VCs Option)) THEN
- Page 429 and 430: IF (Load Factor = In nity) THEN Loa
- Page 431 and 432: ; (Contribution[VC] = Decay Factor)
- Page 433 and 434: Name Explanation Flow Chart (FC) or
- Page 435 and 436: Figure C.2: Flow Chart for Achievin
- Page 437 and 438: Figure C.4: Flow Chart of averaging
- Page 439 and 440: Figure C.6: Flow chart of averaging
- Page 441 and 442: C.3 Pseudocode for VS/VD Design Opt
- Page 443 and 444: (* | Bottleneck rate of next loop |
- Page 445 and 446: Follow SESRules 1-4 (see appendix A
- Page 447 and 448: CRM - Missing RM-cell Count DIR bit
- Page 449 and 450: TUB -Target Utilization Band Trm -
- Page 451 and 452: [12] J. Bennett and G. Tom Des Jard
- Page 453 and 454: [38] M. Grossglauser, S.Keshav, and
- Page 455 and 456: [64] H. T. Kung. Flow Controlled Vi
THEN IF New TCR > TCR THEN TCR New TCR �<br />
Inter Cell Transmission Time 1/TCR�<br />
END� (* of FECN Cell process<strong>in</strong>g *)<br />
Averag<strong>in</strong>g Interval Averag<strong>in</strong>g Interval In Cell�<br />
6. A BECN control cell is received from some switch.<br />
IF BECN Option<br />
THEN IF Time Already Acted <<br />
Time Stamp In Cell<br />
THEN IF Load Adjustment Factor In Cell 1<br />
THEN BEGIN<br />
END�<br />
New TCR<br />
TCR In Cell/Load Adjustment Factor In Cell�<br />
IF New TCR < TCR<br />
THEN BEGIN<br />
END�<br />
B.2 The Switch Algorithm<br />
TCR New TCR�<br />
Inter Cell Transmission Time 1/TCR�<br />
Time Already Acted Time Stamp In Cell�<br />
The events at <strong>the</strong> switch and <strong>the</strong> actions to be taken on <strong>the</strong>se events are as follows:<br />
391
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