| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 101 === Since the spread of wireless communication, it is more and more important about transmission rate and information safety. 802.11n is one of the famous technology in WLAN (Wireless Local Area Network), which boosts its own transmission speed by frame aggregation (FA) and other core technologies. Furthermore, it also contains WPA2(Wi-Fi Protected Access 2), which provides secure mechanism for preventing data eavesdropped or stolen during transmission. However, these two features are not taken into consideration together. If users switch on WPA2 for secure purpose during 802.11n transmission, the system throughput will nosedive.
In this thesis, we propose AH-FCCMP (Aggregated Hybrid Automatic Repeat Request Mechanism with Fragmentation Counter Mode with CBC-MAC Protocol), which provides high transmission speed under data transfer safety. This mechanism change the architecture of CCMP for computing encryption/decryption and receiving data in parallel, so the total service time can be reduced. The simulation result shows that AH-FCCMP provides higher system throughput than the original one and the requirement of information security.
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