Farhan Pervez, M. Raheel, Jibran Gill, Kashif Iqbal
{"title":"Uplink Resource Allocation of Multiple DASH Streams for QoE-based Real and Non-real Time Viewing over LTE","authors":"Farhan Pervez, M. Raheel, Jibran Gill, Kashif Iqbal","doi":"10.1109/NGMAST.2016.29","DOIUrl":"https://doi.org/10.1109/NGMAST.2016.29","url":null,"abstract":"The increase in data rates provided by cellular networks and the development of mobile devices capable of recording good quality videos has resulted in increased amount of user generated content. This content can be made available live as well as on-demand for the viewers. Nowadays, most of the video traffic is rate adaptive HTTP based knows as DASH. The paper focuses on utilizing the features of SVC in order to develop an optimized resource allocation scheme for transmitting multiple DASH video streams over LTE network in uplink direction. The physical resources are allocated to the video producers such that the QoE for both real and non-real time viewers is maximized. Simulation results are presented to demonstrate the significance of the proposed optimization on the overall user experience.","PeriodicalId":340716,"journal":{"name":"2016 10th International Conference on Next Generation Mobile Applications, Security and Technologies (NGMAST)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114479954","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}
Kyoung Don Jang, Donghyun Kang, Do Hyoung Kim, H. Park, Y. Eom
{"title":"A Lightweight Pseudo CPU Hotplug Mechanism for Mobile Devices","authors":"Kyoung Don Jang, Donghyun Kang, Do Hyoung Kim, H. Park, Y. Eom","doi":"10.1109/NGMAST.2016.14","DOIUrl":"https://doi.org/10.1109/NGMAST.2016.14","url":null,"abstract":"Power efficiency has become one of the most important issues in mobile devices because of their limited battery size. However, many mobile applications and processors negatively accelerate power consumption of mobile devices. Previous work (e.g., CPU hotplug) may be inappropriate in mobile devices due to their slow responsiveness because it has to migrate all processes running on a CPU, which is to be turned off to save power consumption, to another CPU, thereby resulting in slow responsiveness. In this paper, we propose a novel mechanism, called pseudo CPU hotplug, which efficiently guarantees fast responsiveness while reducing the power consumption of mobile devices. Our mechanism eliminates almost all overhead of operation system such as that of synchronous task migration, and leaves only architecture-dependent overhead of entering deep idle mode. Our evaluation results clearly show that pseudo CPU hotplug outperforms the traditional CPU hotplug mechanism by up to 997 times in terms of response latency. In addition, our mechanism increases the time spent in deep idle mode more than 30% compared to normal status.","PeriodicalId":340716,"journal":{"name":"2016 10th International Conference on Next Generation Mobile Applications, Security and Technologies (NGMAST)","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130742329","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}