2012 9th IEEE International Workshop on Factory Communication Systems最新文献_第5页

The High-Availability Seamless redundancy protocol (HSR): Robust fault-tolerant networking and loop prevention through duplicate discard 高可用性无缝冗余协议(HSR):通过重复丢弃实现健壮的容错网络和环路预防

2012 9th IEEE International Workshop on Factory Communication Systems Pub Date : 2012-05-21 DOI: 10.1109/WFCS.2012.6242569

H. Heine, Oliver Kleineberg

引用次数: 22

Queue-MAC: A queue-length aware hybrid CSMA/TDMA MAC protocol for providing dynamic adaptation to traffic and duty-cycle variation in wireless sensor networks 队列MAC:一种队列长度感知的CSMA/TDMA混合MAC协议，用于在无线传感器网络中提供对流量和占空比变化的动态适应

2012 9th IEEE International Workshop on Factory Communication Systems Pub Date : 2012-05-21 DOI: 10.1109/WFCS.2012.6242552

Shuguo Zhuo, Yeqiong Song, Zhi Wang, Zhibo Wang

{"title":"Queue-MAC: A queue-length aware hybrid CSMA/TDMA MAC protocol for providing dynamic adaptation to traffic and duty-cycle variation in wireless sensor networks","authors":"Shuguo Zhuo, Yeqiong Song, Zhi Wang, Zhibo Wang","doi":"10.1109/WFCS.2012.6242552","DOIUrl":"https://doi.org/10.1109/WFCS.2012.6242552","url":null,"abstract":"Existing low-power MAC protocols only provide low throughput because of the fixed low duty-cycle. This often leads to poor performance when dealing with time-constrained burst traffic. In this paper, we propose a new hybrid CSMA/TDMA MAC protocol, called Queue-MAC, that dynamically adapts the duty-cycle according to the current network traffic. The queue length of nodes is used as the network traffic indicator. When the traffic increases, the active CSMA period is accordingly extended by adding dynamic TDMA slots, allowing thus to efficiently handle burst traffic under real-time constraints. This protocol is implemented on the STM32W108 SOC chips and compared with both a fixed duty-cycle reference protocol and an optimized IEEE802.15.4 MAC protocol. Through extensive experimental measurements, we showed that our queue-length aware hybrid CSMA/TDMA MAC protocol largely outperforms the compared protocols. The proposed protocol can be easily implemented through slight adaptation of the IEEE802.15.4 standard. It presents an optimal bandwidth and energy allocation scheme according to the traffic to be carried. In fact, low-duty cycle, so low power consumption is preserved during light traffic load period, while high throughput is obtained during heavy burst load period.","PeriodicalId":110610,"journal":{"name":"2012 9th IEEE International Workshop on Factory Communication Systems","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127138487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 57

Wireless machine vision systems based on COTS equipment 基于COTS设备的无线机器视觉系统

2012 9th IEEE International Workshop on Factory Communication Systems Pub Date : 2012-05-21 DOI: 10.1109/WFCS.2012.6242535

G. Cena, S. Scanzio, A. Valenzano, C. Zunino

引用次数: 3

Guaranteeing real-time message deadlines in the FlexRay static segment using a on-line scheduling approach 使用在线调度方法保证FlexRay静态段中的实时消息截止日期

2012 9th IEEE International Workshop on Factory Communication Systems Pub Date : 2012-05-21 DOI: 10.1109/WFCS.2012.6242578

R. Lange, F. Vasques, P. Portugal, R. S. Oliveira

{"title":"Guaranteeing real-time message deadlines in the FlexRay static segment using a on-line scheduling approach","authors":"R. Lange, F. Vasques, P. Portugal, R. S. Oliveira","doi":"10.1109/WFCS.2012.6242578","DOIUrl":"https://doi.org/10.1109/WFCS.2012.6242578","url":null,"abstract":"In recent years, the FlexRay communication protocol been promoted as a de facto standard for in-vehicular communication. In the FlexRay protocol, the communication timeline is organized as a sequence of four segments, whereas the static segment defines a set of slots specifically designed for the transmission of synchronous messages. In this paper, we investigate the following problem: “how to allocate a minimum number of static slots to each FlexRay node, while guaranteeing that all synchronous messages will be transmitted before their deadlines.” Unlike previous studies that use linear programming based techniques, we evaluate the number of allocated slots using traditional response time analysis (RTA) techniques. The use of RTA techniques allow us to consider the timing requirements imposed by the set of synchronous message streams. Unlike other approaches, the RTA-based technique proposed in this paper is able to deal with a) message stream sets where periods are not multiple of the FlexRay cycle duration, b) generation of messages at the application layer that are not synchronized with the FlexRay cycle, and c) on-line scheduling of the traffic transferred during the static segment, according to its deadline requirements. The proposed technique is integrated as a RT-Middleware in each node, to take full advantage of the proposed allocation scheme.","PeriodicalId":110610,"journal":{"name":"2012 9th IEEE International Workshop on Factory Communication Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126267220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 16