WAVE (Wireless Access in Vehicular Environments)提供車間通訊之IEEE 802.11擴充通訊協定以支援智慧型傳輸系統之應用程式。WAVE通訊協定主要應用在行車安全，但車輛行進速度快，無法等待過長的IEEE 802.11的連線設定時間。因此WAVE修改部分IEEE 802.11之資料鏈結層設計，主要包含 1)將頻道(Channel)分成一個CCH (Control Channel)和六個SCH (Service Channel)以降低掃描頻道(Channel Scanning)的時間，車輛僅需在CCH接收與傳送與連線設定相關之資訊以及行車安全資料，2)資料傳輸時間分成CCHI (CCH Interval)和SCHI (SCH Interval)以妥善使用CCH與SCH的頻寬資源，在CCHI時車輛須於CCH上接受或傳送訊息，而在SCHI，車輛可切換至欲接收或傳送資料之SCH。然而，多數WAVE的研究中，未提供合適的模組於NS2上並探討於CCH和SCH上之資料傳送效率。因此本篇論文中，我們設計NS2-WAVE模組以提供WAVE網路通訊協定的模擬運作環境，並驗證WAVE的設計能符合車間通訊的需求。

WAVE (Wireless Access in Vehicular Environments) is an amendment of 802.11 for inter-vehicle communication and supporting ITS (Intelligent Transport Systems). WAVE is designed for reducing the accidents by noticing neighboring vehicles through wireless network. Following changes mainly occurs in WAVE: 1) the channel is divided into one CCH (Control Channel) and six SCHs (Service Channels) to reduce the time of channel scanning, and only the type of WSMP (WAVE Short Message Protocol) data could be transmitted in the CCH. 2) The period is separated into CCHI (CCH Interval) and SCHI (SCH Interval) for allocating the bandwidth properly, and it is stipulated that the data acceptance and transmission should be through CCH when is in the CCHI period. However, majority of thesis neglect the transmission performance on CCH/SCH, even without providing suitable WAVE model in NS2. Therefore, we designed the NS2-WAVE module to setup a WAVE environment and evaluate the performance of inter-vehicular communication.

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