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Enhancing satellite system throughput using adaptive HARQ for delay tolerant services in mobile communications 在移动通信中使用自适应HARQ增强卫星系统的容错服务吞吐量
2015 Wireless Telecommunications Symposium (WTS) Pub Date : 2014-11-13 DOI: 10.1109/WTS.2015.7117278
R. Ahmad, J. Lacan, F. Arnal, Mathieu Gineste, L. Clarac
{"title":"Enhancing satellite system throughput using adaptive HARQ for delay tolerant services in mobile communications","authors":"R. Ahmad, J. Lacan, F. Arnal, Mathieu Gineste, L. Clarac","doi":"10.1109/WTS.2015.7117278","DOIUrl":"https://doi.org/10.1109/WTS.2015.7117278","url":null,"abstract":"In this paper we propose the introduction of adaptive hybrid automatic repeat request (HARQ) in the context of mobile satellite communications. HARQ schemes which are commonly used in terrestrial links, can be adapted to improve the throughput for delay tolerant services. The proposed method uses the estimation of the mutual information between the received and the sent symbols, in order to estimate the number of bits necessary to decode the message at next transmission. We evaluate the performance of our method by simulating a land mobile satellite (LMS) channel. We compare our results with the static HARQ scheme, showing that our adaptive retransmission technique has better efficiency while keeping an acceptable delay for services.","PeriodicalId":300798,"journal":{"name":"2015 Wireless Telecommunications Symposium (WTS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129401984","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: 8
Analytical modeling of uplink power control in two-tier femtocell networks 两层飞蜂窝网络中上行功率控制的分析建模
2015 Wireless Telecommunications Symposium (WTS) Pub Date : 2013-10-01 DOI: 10.1109/WiMOB.2013.6673413
Fei Wang, Weidong Wang
{"title":"Analytical modeling of uplink power control in two-tier femtocell networks","authors":"Fei Wang, Weidong Wang","doi":"10.1109/WiMOB.2013.6673413","DOIUrl":"https://doi.org/10.1109/WiMOB.2013.6673413","url":null,"abstract":"Despite the advantages of deploying femtocells into cellular networks, the consequent cross-tier interference has seriously limited the network performance. Applying different power control techniques has been heavily discussed in 3GPP as an efficient approach for handling dominant interference scenarios. Instead of relying on system level simulations, this paper evaluates an analytical uplink power control model based on spatial Poisson Point Process. Tractable expressions for the coverage probability and average achievable rates of both Macro UEs and Femto UEs are obtained. We also propose to reduce the densities of femtocells around the macro base stations and analyze the consequent network performance. These results provide guidelines for the design of two-tier co-channel networks.","PeriodicalId":300798,"journal":{"name":"2015 Wireless Telecommunications Symposium (WTS)","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115721054","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: 10
Channel quantization in order to realize interference alignment onto a lattice 信道量化，以实现对晶格的干涉对准
2015 Wireless Telecommunications Symposium (WTS) Pub Date : 1900-01-01 DOI: 10.1109/WTS.2015.8070399
C. C. Trinca, J. Belfiore, E. D. de Carvalho, J. V. Filho
{"title":"Channel quantization in order to realize interference alignment onto a lattice","authors":"C. C. Trinca, J. Belfiore, E. D. de Carvalho, J. V. Filho","doi":"10.1109/WTS.2015.8070399","DOIUrl":"https://doi.org/10.1109/WTS.2015.8070399","url":null,"abstract":"Interference is usually viewed as an obstacle to communication in wireless networks, so we develop a new methodology to quantize the channel coefficients in order to realize interference alignment onto a lattice and our channel model is the same as the compute-and-forward strategy. In this new methodology, we describe a way to find a doubly infinite nested lattice partition chain for any dimension n = 2r−2, where r ≥ 3, and, for that, we make use of the binary cyclotomic field Q(ϵe2r ), with r ≥ 3. Thus, for the complex case, we develop the generalization to obtain such doubly infinite nested lattice partition chains in order to realize interference alignment onto a lattice. This new methodology used to solve the problem is original and can contributes greatly to the area, that is, it can be very useful in future developments.","PeriodicalId":300798,"journal":{"name":"2015 Wireless Telecommunications Symposium (WTS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115250211","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: 0
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