A Simulation Case Study of the new IEEE 802.11e HCCA mechanism in Industrial Wireless Networks
A Simulation Case Study of the new IEEE 802.11e HCCA mechanism in Industrial Wireless Networks
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工业无线网络中新的 IEEE 802.11e HCCA 机制的仿真案例研究
DOI：
10.1109/etfa.2006.355189
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
S.P. Karanam
中科院分区：
文献类型：
--
作者：
H. Trsek;J. Jasperneite;S.P. Karanam
在工业自动化应用中使用基于IEEE 802.11的无线局域网（WLAN）的优势是巨大的，包括更高的灵活性、更大的移动性和更低的维护成本。然而，目前使用的介质接入机制使无线局域网具有不确定性，因此不适合工业实时业务。新修订的IEEE 802.11e引入了用于参数化QoS的HCF控制信道访问（HCCA）和用于优先化QoS的增强型分布式信道访问（EDCA）。本文通过网络模拟器OPNET的仿真案例研究，评估了HCCA在具有实时性要求的工业自动化网络中的性能，并将结果与EDCA在各种场景下的延迟进行了比较。
The advantages of using IEEE 802.11-based wireless local area networks (WLAN) in industrial automation applications are substantial and comprise a higher flexibility, greater mobility and reduced maintenance costs. However, the currently used medium access mechanism makes WLANs non-deterministic and hence not suitable for industrial real-time traffic. The new amendment IEEE 802.11e introduces the HCF controlled channel access (HCCA) for parameterized QoS and the enhanced distributed channel access (EDCA) for prioritized QoS. This paper evaluates the performance of the HCCA in an industrial automation network with real-time requirements by means of a simulation case study with the network simulator OPNET and compares the results with the EDCA in terms of latency in various scenarios.