Medium Access Control (MAC) Information Network 1 /
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1 (3) Suguru Yamaguchi Nara Institute of Science and Technology Department of Information Science
2 Medium Access Control (MAC) Information Network 1 /
3 Access Channel : Point-to-point PPP Point-to-point (LAN) wireless LAN Information Network 1 /
4 MAC Protocols (1) Medium Access Protocol R MR/M : Information Network 1 /
5 MAC Protocols (2) : Channel Partitioning () Random Access Taking turns Information Network 1 /
6 TDMA (1) Time Division Multiple Access Length = 1 frame (N=8) terminal B terminal A Information Network 1 /
7 TDMA (2) Information Network 1 /
8 TDMA (3) Information Network 1 /
9 TDMA ATM () TDMA TDMA Based on STM (Synchronous transfer mode) TDMA LAN ATM LAN TDMA Information Network 1 /
10 FDMA Frequency Division Multiple Access frequency band frequency band frequency band 1 Frequency 2 3 Time Information Network 1 /
11 FDMA (2) () Information Network 1 /
12 OFDM Orthogonal Frequency Division Multiplexing OFDM (EU) ADSL LAN (IEEE a/g/n) WiMAX (IEEE d/e) 4G Information Network 1 /
13 A, θ k, f c, 3: s( t) = A cos( 2π f t + θ ) ASK : Amplitude Shift Keying PSK : Phase Shift Keying FSK : Frequency Shift Keying c k OFDM ASKPSK Quadrature Amplitude Modulation (QAM) Information Network 1 /
14 Symbol Waveform Digital Information carrier ASK PSK FSK Symbol length Information Network 1 /
15 (1) Integrated Services Digital Broadcasting for Terrestrial Television Broadcasting (ISDB-T) MHz13OFDM(~430 khz ) HDTV or SDTV: 12 Mobile TV : 1 Information Network 1 /
16 (2) NHK public paper: Information Network 1 /
17 Random Access Protocols R Random access MAC : : ALOHA Slotted ALOHA CSMA CSMA/CD CSMA/CA Information Network 1 /
18 Pure ALOHA (1) ALOHA system 2 -> (uplink) -> (downlink) : ACK ACK ACKRTT (Round Trip Time) [0,K] r r Information Network 1 /
19 Pure ALOHA (2) Information Network 1 /
20 Pure ALOHA (3) K Information Network 1 /
21 Slotted ALOHA (1) Slotted ALOHA pure ALOHA systematic order (throughput 18.4% 36.8%) Information Network 1 /
22 Slotted ALOHA (2) Basic idea: Information Network 1 /
23 Pure ALOHA vs Slotted ALOHA Slotted ALOHA : Pure ALOHA Slotted ALOHA Information Network 1 /
24 CSMA (1) Carrier Sense Multiple Access ( ) RTT/2 Information Network 1 /
25 CSMA (2) () 1-persistent channel free: channel busy: 1 non-persistent channel free: channel busy: (slotted) p-persistent CSMA channel free: p channel busy: Information Network 1 /
26 CSMA (3) CSMA Collision Detection (/CD) Ethernet Collision Avoidance (/CA) LAN Information Network 1 /
27 MAC Throughput Performance Information Network 1 /
28 Taking Turn MAC Protocols MAC: : 1/N Random access MAC protocols : : Taking turns :Polling & Token Information Network 1 /
29 Token Passing (Token Bus), (Token Ring) FDDIToken Passing () Information Network 1 /
30 Historical transition Pure ALOHA Slotted ALOHA CSMA CSMA/CD (Ethernet) Token Ring FDDI TDMA ATM Information Network 1 /
31 Ethernet (IEEE Family) Information Network 1 /
32 Ethernet CSMA/CDLAN IEEE Mbps, base-band transmission 1500octet MTU LAN 10Base5, 10Base2 UTP10BaseT Information Network 1 /
33 Fast Ethernet 100Mbps Ethernet UTP/CAT5 10 Mbps Ethernet 100BaseT / 10BaseT/100BaseT, Unidirectional / Bidirectional Information Network 1 /
34 Gigabit Ethernet (IEEE802.3z) 1Gbps Half-channel is 1Gbps Full duplex 1000Base-SX (), 1000Base-LX () IEEE802.3z NIC Information Network 1 /
35 Gigabit Ethernet (IEEE802.3ab) New Gigabit Ethernet standard 1000Base-T UTP 1Gbps Ethernet Maximum 100m Information Network 1 /
36 Ethernet Family Strengths Fast Ethernet 10BaseT Fast Ethernet10BaseT network Plug-and-play ATM Information Network 1 /
37 Ethernet Technology Ethernet Fast Ethernet Gigabit Ethernet Data Rate 10Mbps 100Mbps 1Gbps CAT 5 UTP 100m 100m 100m (CAT5+/6) STP/Coax 500m 100m N/A Multi-mode Fiber 2Km 412m (hd*) 2Km (fd*) 550m Single-mode Fiber 25Km 20Km > 5Km *IEEE half duplex/full duplex note: IEEE 802.3z Information Network 1 /
38 Ethernet s address 6 (48 bit) (IEEE) 3 IEEE MAC address 00:a0:cc:7c:47:16 Assigned by IEEE Assigned by vendor 00 a0 cc 7c Information Network 1 /
39 10Gbps Ethernet IEEE802.3ae 2002IEEE WANLAN WAN PHY SONET frame SONET/SDH 300m, wavelength: 850nm 10km, wavelength: 1310nm 40km, wavelength: 1550nm LAN PHY Ethernet Frame 300m, wavelength: 850nm 10km, wavelength: 1310nm 40km, wavelength: 1550nm 10km, wavelength: 1310nm GBASE-LR serial (1310nm) 10GBASE-EX4(1550nm WWDM e: 10Km 50Km Information Network 1 /
40 40Gbps/100Gbps Ethernet IEEE802.3ba 20097IEEE : 10Gbps 2(full-duplex) BER (Bit Error Rate) OTNOptical Transport Network) 40Gbps SMF >10km OM3 MMF >100m Copper cable assembly >7m Backplane >1m 100Gbps SMF >40km or >10km OM3 MMF >100m Copper cable assembly >7m Information Network 1 /
41 40Gbps Ethernet Single-mode Fibre PMD IEEE802.3bg PMD: Physical Medium Dependent : MAC/PLSBER10-12 MAC40Gbps 40GBASE-R PCS PMA IEEE 802.3baIEEE 802.3as SMF2km40Gbps 40Gbps(OTU3/ STM-256/OC-768/40G POS) Information Network 1 /
42 Future of Ethernet Terabit Ethernet P802.3bj 100m4x25G 2km Switch agnostic NIC Partitioning (NPAR) OpenFlow Virtual ports: NIC, FCoE, or isci research control plane 42
43 Requirements for the Data Link Information Network 1 /
44 Today s data link requirements Wide bandwidth Large scale Virtualization Coverage expansion Information Network 1 /
45 Development of data link technologies Wide bandwidth Switched media Large scale Bridges Virtualization VLAN Coverage expansion Broadband wireless, residential access, etc. Information Network 1 /
46 Wide bandwidthshared media switched media High-bandwidth commodity LAN Processor Interconnect Technology medium access Non-blocking crossbar switch Information Network 1 /
47 switched media switched media shared media Shared media Wireless LAN Voice Video (MPEG2) Video (MotionJPEG) Switched media Ethernet Voice Video (MPEG2) Video (MotionJPEG) Video (D1) Video (HD D1) Information Network 1 /
48 Large scale Bridges LAN, Wiring in floorcoax 100m Wiring between buildingsoptical fiber 5km Information Network 1 /
49 Bridge basics: Transparent bridge Transparent bridge MAC Promiscuous: Transparent bridge 1 2 Fwd to 1 Fwd to 2 A, B, C, D E, F, G, H Information Network 1 /
50 Learning bridge MAC (flooding) MAC 1 2 Construct a table with learning Information Network 1 /
51 Loops in learning bridges AG Information Network 1 /
52 Spanning tree bridges Spanning tree 1D 3D 2D 4R 6A 5D 7D R: root port D: designated port 9D A: alternative port 8D 10R Information Network 1 /
53 More various technologies VLAN VLAN WDM MPLS Broadband wireless, residential access, WiMAX, Information Network 1 /
(1) CCITT X.25 (HDLC/LAPB) SDLC (Synchronous Data Link Control protocol) HDLC High-speed Data Link Control protocol ITU-T/ISO ADCCP Advanced Data Comm
I / 6 1 1. HDLC I / 6 2 (1) CCITT X.25 (HDLC/LAPB) SDLC (Synchronous Data Link Control protocol) HDLC High-speed Data Link Control protocol ITU-T/ISO ADCCP Advanced Data Communication Control Protocol
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