Jingxian Liu, Ke Xiong, Zhuyan Zhao, Shaohong Zhong, Z. Zhong, B. Ai
{"title":"The effects of moving speed on handover performances with measurement data","authors":"Jingxian Liu, Ke Xiong, Zhuyan Zhao, Shaohong Zhong, Z. Zhong, B. Ai","doi":"10.1109/ITST.2017.7972215","DOIUrl":"https://doi.org/10.1109/ITST.2017.7972215","url":null,"abstract":"This paper investigates the effects of moving speed on handover performances with measurement data from three scenarios, i.e., viaduct environment, cutting environment and urban area. To do so, we first extract some samples from measurement data. As the data neglected the effect of shadow fading and interchannel interference (ICI), we then add some values into the data, which are the shadowing generated following lognormal distribution and the upper bound of ICI power caused by Doppler frequency spread. Based on the data, we analyze the effects of moving speed on handover performances in Long Term Evolution (LTE) , where the handover performance including the handover starting point is calculated in terms of the measurement data and the handover procedure in LTE. Numerical results show that higher speed postposes the handover starting point.","PeriodicalId":339606,"journal":{"name":"2017 15th International Conference on ITS Telecommunications (ITST)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122236299","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}
{"title":"Sum-rate based relay selection with feedback delay for a multiple half/full-duplex two-way relaying","authors":"V. Ozduran, E. Soleimani-Nasab, B. Yarman","doi":"10.1109/ITST.2017.7972196","DOIUrl":"https://doi.org/10.1109/ITST.2017.7972196","url":null,"abstract":"This paper investigates the feedback delay effects on opportunistic relay selection strategy. The investigation considers a dual-hop multiple half/full-duplex two-way wireless relaying network in the system model. The selection strategy is based on the sum-rate of user-pair and related relay terminal. According to Monte-Carlo simulation results, sum-rate based relay selection strategy achieves cooperative diversity order in high signal-to-noise regimes for half-duplex and full-duplex cases. If the loop-interference variances are chosen relatively low, sum-rate based full-duplex relay selection strategy outperforms the sum-rate based half-duplex relay selection strategy. Feedback delay does not have any effects on the system performance in low signal-to-noise regimes but it does affect the performance curves and degrades the achievable diversity order from M to 0 and causes system coding gain losses in high signal-to-noise regimes.","PeriodicalId":339606,"journal":{"name":"2017 15th International Conference on ITS Telecommunications (ITST)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128056204","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}
{"title":"Case study of differential-GPS safety integrity performance on Qinghai-Tibet railway line","authors":"Debiao Lu, B. Cai","doi":"10.1109/ITST.2017.7972206","DOIUrl":"https://doi.org/10.1109/ITST.2017.7972206","url":null,"abstract":"At the design stage of GPS (Global Positioning System), there is no provision of real-time integrity information for the standard positioning service (SPS). Meanwhile the precise positioning service (PPS) provides signal in space (SIS) integrity as “lower than 1 × 10−5 probability per hour”. Because PPS access to WAGE (Wide Area GPS Enhancements) rapid ephemeris updates and corrections. But only SPS is available for civilian applications.","PeriodicalId":339606,"journal":{"name":"2017 15th International Conference on ITS Telecommunications (ITST)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115392423","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}
T. Nagaoka, Hiroyuki Hatano, M. Fujii, Atsushi Ito, Yu Watanabe
{"title":"A study on estimation method of pedestrian's walking status for GPS positioning correction","authors":"T. Nagaoka, Hiroyuki Hatano, M. Fujii, Atsushi Ito, Yu Watanabe","doi":"10.1109/ITST.2017.7972201","DOIUrl":"https://doi.org/10.1109/ITST.2017.7972201","url":null,"abstract":"It is important to develop pedestrians, convenience and safety for realizing ITS world. In recent years, navigation for pedestrians has been increased by spreading of smart phones. The GPS (Global Positioning System) is main stream to obtain user's position information outdoors. However, positioning quality is poor in urban area. Then, the positioning reliability becomes worse. We can point out the following two problems. Firstly, the position information is shown on the sidewalk on the opposite side where the user is present although he does not cross the roadway. Secondly, despite the fact that he is not moving, the position information is shown as if the user is moving. Our purpose is to improve the above two problems. In this paper, we will propose two methods to estimate pedestrian's behaviors on roads. One is to estimate the time of starting road crossing. Another is to estimate pedestrian's state, that is moving or stopping. In this paper, we assume that the pedestrians is on the sidewalk of roads. Then, we will use a magnetic field sensor on the smartphone in order to estimate the above two pedestrian's behaviors. And we will show the ability of the both methods.","PeriodicalId":339606,"journal":{"name":"2017 15th International Conference on ITS Telecommunications (ITST)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122333217","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}