{"title":"安全关键实时系统的改进HCCA机制","authors":"Qiang Zhou, Pengwei Ma","doi":"10.1109/ICCSN.2016.7586672","DOIUrl":null,"url":null,"abstract":"This paper aims to use WLAN protocol to support the transmission of hard-real-time(HRT) traffic stream (TS) in safety critical real time system(SCRTS). Firstly, this paper analyzes the reference scheduling mechanism for IEEE 802.11e to guarantee quality of service (QoS)and discuss the drawback of the sample scheduling algorithm for IEEE 802.11e Hybrid Coordination Function(HCF) controlled channel access(HCCA) mechanism under the background of HRT application. And then, this paper advances an improved scheduling algorithm for HRT traffic stream which sets up the messages HRT attribute and adjust the transmission opportunity dynamically, aiming to guarantee HRT messages QoS. Finally, the improved algorithm is implemented based on NS2 and the simulation result shows the optimized algorithm can improve the HRT traffic QoS effectively.","PeriodicalId":158877,"journal":{"name":"2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)","volume":"50 3 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2016-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"An improved HCCA mechanism for safety critical real time system\",\"authors\":\"Qiang Zhou, Pengwei Ma\",\"doi\":\"10.1109/ICCSN.2016.7586672\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper aims to use WLAN protocol to support the transmission of hard-real-time(HRT) traffic stream (TS) in safety critical real time system(SCRTS). Firstly, this paper analyzes the reference scheduling mechanism for IEEE 802.11e to guarantee quality of service (QoS)and discuss the drawback of the sample scheduling algorithm for IEEE 802.11e Hybrid Coordination Function(HCF) controlled channel access(HCCA) mechanism under the background of HRT application. And then, this paper advances an improved scheduling algorithm for HRT traffic stream which sets up the messages HRT attribute and adjust the transmission opportunity dynamically, aiming to guarantee HRT messages QoS. Finally, the improved algorithm is implemented based on NS2 and the simulation result shows the optimized algorithm can improve the HRT traffic QoS effectively.\",\"PeriodicalId\":158877,\"journal\":{\"name\":\"2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)\",\"volume\":\"50 3 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2016-06-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ICCSN.2016.7586672\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2016 8th IEEE International Conference on Communication Software and Networks (ICCSN)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICCSN.2016.7586672","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
An improved HCCA mechanism for safety critical real time system
This paper aims to use WLAN protocol to support the transmission of hard-real-time(HRT) traffic stream (TS) in safety critical real time system(SCRTS). Firstly, this paper analyzes the reference scheduling mechanism for IEEE 802.11e to guarantee quality of service (QoS)and discuss the drawback of the sample scheduling algorithm for IEEE 802.11e Hybrid Coordination Function(HCF) controlled channel access(HCCA) mechanism under the background of HRT application. And then, this paper advances an improved scheduling algorithm for HRT traffic stream which sets up the messages HRT attribute and adjust the transmission opportunity dynamically, aiming to guarantee HRT messages QoS. Finally, the improved algorithm is implemented based on NS2 and the simulation result shows the optimized algorithm can improve the HRT traffic QoS effectively.
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