無線網絡必然要與Internet結合，實現移動用戶手機上網，對無線應用協議棧WAP中各協議的性能進行仿真就顯得非常必要，該文基于對WAP協議棧中的WTLS協議的仿真，評估了WTLS協議；并利用OPNET軟件對該協議建立網絡拓撲、建立節點模型等，給出了WTLS協議在用戶節點數、用戶節點通話時間以及信道速率變化等方面的性能仿真結果，重點指標包括對需實時響應的信號有重要影響的分組延遲、響應延遲變化量及響應時間。
關 鍵 詞 無線傳輸層安全協議; 性能指標; 仿真; 建立模型

Abstract With the combination of wireless network and Internet, mobile subscribers will certainly access Internet, so it is very necessary to simulate protocols in WAP. Based on the simulation to WTLS protocol in WAP, this paper evaluates WTLS protocol. We adopt the software OPNET to build network topology, node model, etc, and acquire the protocol’s simulation performance results in moving subscriber numbers, moving subscribers’ average session time, channel rates variety, etc. The important indexes include packet delay, response delay change quantities and response time. These performances will seriously affect real time response signal.
Key words WTLS protocol; Performance index; Simulation; Build model