ISO/IEC INTERNATIONAL STANDARD 9314-5 First edition 1995-02-01 Information technology Fibre Distributed Data Interface (FDDl) Part 5: Hybrid Ring Control (HRC) fibre(FDDI)- Partie 5: Commande hybride par anneau (HRC) Reference number ISO/IEC 9314-5:1995(E) Copyright Intermational Organization for Standardization I without license from IHS Not for Resale ISO/IEC 9314-5 : 1995 (E) Contents Foreword .iv 1 Scope 2 Normative references .. 3 Definitions 2 4 Conventions and abbreviations . 6 4.1 Conventions 6 4.2 Abbreviations. 5 General description . 5.1 Traffic types .... 9 5.2 Transmission facilities 9 5.3 Bandwidth management. 5.4 Station structure ... 12 6 HRC services... 16 6.1 PHY to H-MUX services 17 6.2 H-MUX to MAC services .18 6.3 H-MUX to P-MAC services . .19 6.4 H-MUX to I-MAC services .. 6.5 H-MUX to SMT services .. 6.6 i-MAC to CS-MUX services. .30 6.7 I-MAC to SMT services .32 7Facilities 7.1 H-MUX symbol set .. 7.2 Cycle . 7.3 HRC protocoi parameters.. ..38 7.4 Variables . 7.5 Timers .... 7.6 Counters .... 7.7 Signals...... 7.8 Functions.. 44 8 Operation .. .44 8.1 Ring operation overview.. 8.2 Error recovery .. .50 8.3 Structure... 8.4 Cycle acquisition .. 8.5 Cycle generation process.. 67 8.6 Cycle exchange process .. @ISO/IEC1995 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, eiectronic or mechanicai, inciuding photocopying and microfilm, without permission in writing from the publisher. internationai Organization for Standardization Case postale 56·CH-1211Geneve 20· Switzerland Printed in Switzerland 1i No reproduction or networking permitted withou Not for Resale ISO/IEC 9314-5 : 1995 (E) @ ISO/EC Annexes A Examples of the circuit-switch service class .. ...86 B - FDDI station considerations ... ...94 C Isochronous call control procedures.. ....99 D - Isochronous channe! security . ..104 E Isochronous bandwidth management .. ..106 F Logicai ranking of monitors . ..108 Figures Figure 1 - Structure of FDDI standards , .3 Figure 2 -- HRC cycle structure ... ..8 Figure 3 - Hybrid mode traffic types . Figure 4 Bandwidth management hierarchy ..11 Figure 5-Data flow through an FDDi-Il monitorstation. ...13 Figure 6 Data flow through an FDDI-Il non-monitor station , ...14 Figure 7 — Architecturai biock diagram of the H-MUX ...14 Figure 8 Architectural block diagram of the I-MAC.. ..16 Figure 9— H-MUX cycle structure at 100 Mbps Figure 10 - H-MUX cycle header .... ....35 Figure 11 -- Example of wideband channel interleaving... ....37 Figure 12 Example of wideband channel sorting . .37 Figure 13 - H-MUX structure .. ..54 Figure 14 --- HRC receive state diagram .. ...58 Figure 15 - WBC template filter state diagram .. ..62 Figure 16 HRC cycie controi state diagram ... ..68 Figure 17 HRC cycle generate state diagram . .76 Figure 18 -- WBC template generation state diagram . ...83 Figure A.1 -- Example of a byte interleave burst mode Cs-MUx .....87 Figure A.2 Example of a bit interleave burst mode Cs-MUx ........ 88 Figure A.3 -- Example of a bit interleave continuous mode CS-MUX . Figure A.4 Example of 2048 kbps G.703/G.732 bridge and associated Cs-MUx.... ....90 Figure A.5Example FDDi-Il to G.703/G.732 protocol layers .... Figure B.1 -- FDDi-Ill clock tolerance budget ... ...96 Figure B.2 Sinusoidai and triangular jitter waves .. ...96 Figure B.3 FDDI-l! allowable input jitter vs. network maximum jitter ...97 Figure C.1 Isochronous channel reservation .100 Figure C.2 Isochronous call establishment ..101 Figure C.3 Isochronous call released from destination station.....102 Figure C.4 Isochronous call released from originating station .....102 Figure C.5 -- Isochronous channel release ... ..103 ili Not for Resa ISO/IEC 9314-5 : 1995 (E) @ISO/IEC Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National bodies that