列车网络控制技术(2)

23“”bussegment“”busmasterbusslaver“”busProtocol4“”transaction“”“”5“”“”broadcastaddresses“”“”arbitration“”timing67891001011011010010At1011010010At1011010010At1011010010At2-210“1”“0”“1”“0”01100101112-510010111201ASKamplitude-sheftkeyingFSKfrequency-sheftkeyingPSK(phase-shiftkeyingabcd2-6011001011013bps9600bps9600NNeNNPe≈14N10lgS/N151617bCa2-718MUXMUX1221......nn...2-10192021222324252627-28,9600bps24230kbps-15km10Mbps100m10100kHz293050Ethernet10MbpsCATV75-3150100m3210141015Hz2.14LEDILDPINAPDASKMbpsMbps33-68km10-510-610-710-910-10341091010Hz10111014Hz10141015Hz3536CSMA/CD37“”“”38CSMA/CD/CSMACSMAP1-P39CSMA/CD/1-NNPPNP10PNP1,P40CSMAtoken41tokenring42tokenring2.152-15b43token-passingbusPSNS44token-passingbus45token-passingbus‹‹‹‹‹IEEE802.4464748repeaterbridgeroutergateway49505152IEEE19802IEEE802802OSIIEEE802.1IEEE802.112-24IEEE802.1IEEE802.6IS0IS08802.1IS08802.65354Netware——NovellApplewindowsNTserver——LANmanager——55NetwareNovellAppleODIopendatalinkinterfaceNetwareNetwareEthernetTokenBusTokenRing802EthernetTokenBusTokenRing56windowsNTserverNDISTCP/IPNeTBIOSNeTBEUINTwindowsNTserverwindowsNTworkstation57LANmanagerNDISEthernetTokenRingARCNetclient/server