1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS 2003 5 17 KS X ISO/IEC 9314 8 8 ： 2 KS X ISO/IEC 9314 8： 2003 X ISO/IEC 9314 8： 2003 ( ) ( ) ( ) ( ) ( ) ( ) ： ： 2003 5 17 03 499 ： ： ( ) ( 02 509 7336) . 7 5 , . ICS 35.200 KS X ISO/IEC (FDDI) 8 ： 2(MAC2) 9314 8： 2003Information technology Fibre Distribute
2、d Data Interface(FDDI) Part 8： Media Access Control 2(MAC 2) , KS 1995 2 1 ISO/IEC 9314 5 Hybrid Ring Control(HRC) . ISO(the International Organization for Standardization ： ) IEC(the International Electrotechnical Commission： ) . ISO IEC . ISO IEC . ISO IEC . (IT： Information Technology) ISO IEC IS
3、O/IEC JTC 1 . . 75% . ISO/IEC JTC 1 . ISO/IEC 9314 . 1： (PHY) 2： (MAC) 3： (PMD) 4： (SMF PMD)1) 5： (HRC)(1995) 6： (SMT) 7： (PHY 2) 8： 2(MAC 2) 9： (LCF PMD)( ) 10： (TP PMD)( ) 13： (CT PICS) 20： (PMD ATS)( ) 21： (PHY ATS)( ) X ISO/IEC 9314 8： 2003 2 25： FDDI (SMT ATS) 26： (MAC ATS)( ) ISO/IEC 9314 (FDD
4、I) 100Mbit/s . FDDI . FDDI Km . (MAC) FDDI . FDDI . MAC , , . MAC . ISO/IEC 9314 FDDI . a) ISO/IEC 9314 (PHY) b) ISO/IEC 9314 (PMD) c) ISO/IEC 9314 (SMT) ISO/IEC 9314 . HRC , FDDI II ISO/IEC 9314 5 (HRC) FDDI . ISO/IEC 9314 4 , PMD 60Km . PMD . PMD(LCF PMD) PMD(TP PMD) . ISO/IEC 9314 MAC 2 FDDI MAC(
5、ISO 9314 2) . MAC MAC 2 MAC 2 . ISO 9314 2 MAC MAC 2 FDDI II MAC FDDI . MAC 2 . 1. (Fibre Distributed Data Interface ; FDDI .) (Data Link Layer ; DLL .) (Media Access Control ; MAC .) . FDDI , , (100Mbit/s) . FDDI 80Mbit/s(10Mbyte/s) . FDDI Km . FDDI ( ) 1 000 200Km( 500 100Km .) . FDDI . ISO/IEC 93
6、14 1 . X ISO/IEC 9314 8： 2003 3FDDI . a) 2 . 1) (PMD) : FDDI . PMD FDDI . PMD , , , , , , . PMD FDDI PMD . (PMD) ISO/IEC 9314 3 . (sonet) PMD . 2) (PHY) : . PHY . PHY (1) , (2) , (3) , (4) . PHY . PHY ISO 9314 1 . b) DLL 2 . 1) (HRC： Hybrid Ring Control： HRC .) FDDI (circuit switched data) . HRC (Hy
7、brid Multiplexer： H MUX) MAC(Isochronous MAC： I MAC) 2 . H MUX 125s , I MAC (circuit switched channels) . 2) MAC (Address Recognition) (Frame Check Sequence： FCS) . MAC 1 , , . MAC ISO/IEC 9314 8 MAC . 3) LLC MAC . FDDI LLC . 4) (circuit switching) (multiplexer) I MAC (network layer) . FDDI CS MUX .
8、 c) (Station Management： SMT) FDDI . SMT , , . MAC . X ISO/IEC 9314 8： 2003 4 MAC ISO/IEC 8802 5 FDDI . ISO/IEC 9314 FDDI . FDDI 2 . . ( .) ISO/IEC 9314 2 . FDDI ISO/IEC 9314 8 ISO/IEC 9314 2 . (SMT) (CS-MUX)(LLC)MAC(I-MAC) (MAC) (PMD) (PHY)FDDI (DLL) (HRC) ( ) (H-MUX) HRC MAC2; MAC MAC 2 HRC PHY 2;
9、 PHY PHY 2 PMD, SMF_PMD, TP PMD, LCF PMD HRC SMT 2; SMT SMT2 1 FDDI 2. ISO IEC 9314 1 . ISO ISO 9314 . ISO/IEC 9314 1 . . ISO/IEC 8802 2： 1994 ( ) X ISO/IEC 9314 8： 2003 5 2： (LLC) ISO/IEC 8802 5： 1992 5 : ISO 9314 1： 1989 (FDDI) 1： (PHY) ISO 9314 2： 1989 (FDDI) 2： (MAC) ISO 9314 3： 1990 (FDDI) 3： (
10、PMD) ISO/IEC 9314 4： 1990 (FDDI) 4： (SMF PMD) ISO/IEC 9314 5： 1995 (FDDI) 5： (HRC) ISO/IEC 9314 6 ： (FDDI) 6： Station Management(SMT) ISO/IEC 9314 7： (FDDI) 7： (PHY 2) ISO/IEC 10038： 1993 (MAC) 3. . , ISO/IEC 9314 . . , ISO/IEC 9314 ISO/IEC 9314 . 3.1 (asynchronous) 3.2 (basic mode) MAC PDU PHY (hyb
11、rid mode ) 3.3 (bypass) FDDI 3.4 (capture) 3.5 (claim token) 1 MAC 3.6 (counterrotating) 2 3.7 (cycle) HRC 125s . 3.8 (OSI) , 3.9 (fibre optics) 3.10 (frame) MAC PDU . X ISO/IEC 9314 8： 2003 63.11 (hybr id mode) HRC PDU PHY 3.12 (hybrid ring control) FDDI 3.13 (immediate) SMT 3.14 (logical ring) FDD
12、I . FDDI 2 . . 3.15 (Media Access Control : MAC) FDDI 3.16 my long address(MLA) MAC 48 3.17 my short address(MSA) MAC 16 3.18 (FDDI ) , FDDI . . 3.19 (node) , SMT ( PMD PHY) FDDI ( MAC HRC) 3.20 (nonrestricted token) . 3.21 (null address) 0 , enabled . 3.22 (octet) 8 2 . FDDI . 3.23 (Physical Layer
13、Medium Dependen : PMD) PHY FDDI PHY 3.24 (PHY) FDDI DLL DLL (MAC HRC) (symbol) 3.25 (primitive) 3.26 (Protocol Data Unit) . , , ( SDU) 3 . (FDDI MAC PDU) . 3.27 (receive) ( , , ) . . 3.28 (repeat) . . 3.29 (restricted token) , X ISO/IEC 9314 8： 2003 7 3.30 (ring) , , 3.31 (SDU) 3.32 (services) OSI .
14、 . . 3.33 (source routing) (source station) 3.34 (station) FDDI , . FDDI 1 PHY PMD , 0 HRC , 1 MAC 1 SMT . 3.35 (Station Management : SMT) FDDI FDDI 3.36 (symbols) (DLL) . (symbol set) 16 9 . 3.37 (synchronous) (requester) 3.38 (token) (right) (indication). . 0 1 . MAC . 3.39 (transmit) ( , , ) (act
15、ion) 3.40 (transparent bridging) (bridge station) (end) 4. 4.1 SMT, MAC, HRC, PHY PMD FDDI . LLC ISO 8802 2 MAC SMT . ( requested_service_class) , . (period) ( MA_UNITDATA.request) . . ( | .). ( THEN ELSE if .). X ISO/IEC 9314 8： 2003 8 ( ). 4.1.1 (addressing) MSA = SMT enabled MAC 16 . MAS . MLA =
16、SMT enabled MAC 48 . MLA . Short_Addresses MSA 16 MAC . enabled 16 ( 1 ) 16 . Long_Addresses MLA 48 MAC . enabled 48 ( 1 ) 48 . MAC 16 MLA MAC 48 MSA . MAC PDU 0 . 0 . Transparent_Bridge_Addresses 48 MAC . 4.1.2 2 . . , PDU . , . , . TXX . XX 2 . Token Rotation Timer TRT . 2 , . . . . 4.2 A A_Flag . A_Max B Flag C CMT Copied_ct MAC PDU C Flag . DA
