Transcription of 3章 ディジタル無線方式の基礎 - ieice-hbkb.org
1 4 1 3 . 4 - 1 . 3 . [2008 10 ].. LAN QoS .. 3-1 3-2 3-3. 3-4 3-5 .. 2010 1/(11). 4 1 3 . 4 - 1 - 3 . 3-1 . [2008 10 ].. 3 1 . 3 1 . 3-1-1 FDMA Frequency Division Multiple Access . FDMA . 1 .. 3-1-2 TDMA Time Division Multiple Access . TDMA .. 1 . 2010 2/(11). 4 1 3 .. FDMA .. 2 .. 3-1-3 CDMA Code Division Multiple Access . CDMA PN Pseudo Noise .. FDMA TDMA . 3 . 3-1-4 OFDMA Orthogonal Frequency Division Multiple Access . OFDMA .. LAN 3 . Evolved UTRA . Mobile WiMAX . 2010 3/(11). 4 1 3 . 4 - 1 - 3 . 3-2 . [2008 10 ].. Duplex .. FDD Frequency Division Duplex . TDD Time Division Duplex . FDMA TDMA CDMA FDD TDD.. FDD . TDD .. CDMA/FDD CDMA/TDD 3 2 FDD TDD 3 . 1 . 3 2 CDMA/FDD CDMA/TDD. TDD.
2 CDMA/TDD 3 3.. 2010 4/(11). 4 1 3 . 3 1 FDD TDD . 3 3 . 2010 5/(11). 4 1 3 . 4 - 1 - 3 . 3-3 . [2008 10 ].. TCP/IP . TCP . WP-TCP Wireless Profiled-TCP TCP . WP-TCP TCP . WP-TCP 3 4 1 . 2 TCP. 3 SACK Selective ACK .. 1 . 2 TCP .. ACK Acknowledgement . ACK . 2 3 . 3 SACK TCP ACK .. SACK . SACK . 3 4 WP-TCP . WP-TCP WAP Wireless Application Protocol . 3 5 .. 2010 6/(11). 4 1 3 . WP-TCP . WP-HTTP WP-HTTP HTTP .. 3 5 . 2010 7/(11). 4 1 3 . 4 - 1 - 3 . 3-4 . [2008 10 ].. W-CDMA HSDPA High Speed Downlink Packet Access . HSDPA . 1 . AMC: Adaptive Modulation Coding . 2 . 3 . H-ARQ: Hybrid Automatic Repeat request . 1 W-CDMA . HSDPA .. HSDPA . 2 ms 3 6 . 16 QAM . QPSK .. 2 ms . 3 6 . 2 . SINR 2 ms.
3 3 6 1 . 1 2 2 .. 2010 8/(11). 4 1 3 . 3 3 7 .. ARQ .. ARQ . 3 7 . 2010 9/(11). 4 1 3 . 4 - 1 - 3 . 3-5 . [2008 10 ]. 1 1 Unicast . 1 . Broadcast . 1 Multicast .. LAN . LAN . Wi-Fi Multimedia QoS Quality of Service . LAN . EDCA Enhanced Distributed Channel Access . LAN CSMA/CA EDCA . 4 AC . CSMA/CA . DIFS Distributed Inter Frame Space .. DIFS . EDCA . 3 8 EDCA . DIFS AIFS Arbitration IFS .. 3 8 LAN . 2010 10/(11). 4 1 3 .. 1) 1999 . 2) . R&D -55, 114 -116 2007 . 3) BP 2003 . 4) HSDPA NTT , . 2007. 5) 2 2006 . 6) LAN NTT . -60 2007 . 2010 11/(11).
