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Published byDenis Dawson Modified over 9 years ago
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Data Transmission Over Wireless Links Fan Yang 2000.11
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Characteristics of Wireless Links Higher Bit Error Rate (BER) Fading (Period of disconnection)
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The Ways Delivering Data over Wireless Links Based on Non IP Based on IP (Wireless Internet) Internet Protocol Transmission Control Protocol User Datagram Protocol
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Non IP methods Forward Error Correction (FEC) Automatic Repeat ReQuest (ARQ) Packet Interleaving Wireless Application Protocol (WAP)
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Improvement Based on IP Choosing the Maximum Transmission Unit (MTU) Header Compression and Payload Compression Path MTU Discovery (RFC1191)
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TCP: Congestion Control Algorithms Slow Start Congestion Avoidance Fast Retransmit Fast Recovery
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Adjust TCP for Wireless Environment Basic Assumption:
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Modifying Current Congestion Control Algorithms of TCP Modifying Slow Start Selective Acknowledgement Delayed Duplicate Acknowledgement Fast Retransmission Approach Detect Packet Losses
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Indirect TCP Snoop Protocol Wireless TCP (WTCP) TCP for Mobile Cellular Networks (M- TCP) Transport Unaware Link Improvement Protocol (TULIP) Split TCP Approaches
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Other Approaches Packet Scheduling Channel State Dependent Packet Scheduling (CSDP) TCP Trunking
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Improvements based on UDP UDP-Lite UDP for Mobile Cellular Networks (M- UDP)
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Something needs further discussion How about the links of both ends are wireless? Need an interactive method across layer (BER, fading, handover)
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