2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)最新文献_第4页

A framework to evaluate performance from an application and user perspective 从应用程序和用户的角度评估性能的框架

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096668

A. Kist

{"title":"A framework to evaluate performance from an application and user perspective","authors":"A. Kist","doi":"10.1109/ATNAC.2011.6096668","DOIUrl":"https://doi.org/10.1109/ATNAC.2011.6096668","url":null,"abstract":"Experience related performance measures are important for operational, commercial as well as usability reasons. Quality of Experience (QoE) is widely discussed as a measure of user perceived performance, no universal definition for QoE are available. Instead of moulding QoE into a one-fits-all parameter, this work identifies and defines four specific performance measures that are more descriptive than traditional QoE. They account for objective and subjective measures and focus on applications and tasks specific performance. The parameters include Quality of (an) Application (QoA) and Quality of Use (QoU). They are further divided into objective and subjective measures, i.e. objective QoA, subjective QoA, objective QoU and subjective QoU. Subjective QoA reassembles QoE widely discussed in technical literature; QoU provides a measure for quality of experience in a more general, non technical sense. It is proposed that these individual performance parameters provide a better picture of performance and allow stakeholders to make more specific decisions. The paper also introduces a set of sample performance evaluations for the Remote Access Laboratories application to demonstrate how this framework can be applied and how such parameters can be measured.","PeriodicalId":210916,"journal":{"name":"2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114600729","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: 5

Hierarchical DWT based optimal diversity power allocation for video transmission in MIMO wireless systems with quantized feedback 基于分层DWT的量化反馈MIMO无线系统视频传输分集功率优化分配

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096649

Sohil Mahajan, A. Jagannatham

{"title":"Hierarchical DWT based optimal diversity power allocation for video transmission in MIMO wireless systems with quantized feedback","authors":"Sohil Mahajan, A. Jagannatham","doi":"10.1109/ATNAC.2011.6096649","DOIUrl":"https://doi.org/10.1109/ATNAC.2011.6096649","url":null,"abstract":"In this work we propose novel algorithms for singular mode diversity order based optimal power allocation for video transmission in Multiple-Input Multiple-Output (MIMO) wireless systems. We motivate a discrete wavelet transform (DWT) and hierarchical block motion estimation algorithm (HBMA) based spatio-temporal video decomposition that is naturally suited to the ordering and diversity properties of the MIMO channel singular modes for video layer allocation. Based on this paradigm, we propose a framework for the MIMO singular value decomposition (SVD) based optimal power allocation, specifically for the context of MIMO video transmission. Further, we consider a practical MIMO scenario with channel state information (CSI) available only at the receiver and employ a codebook based limited feedback technique to feedback the index of the quantized beamforming vector. This significantly reduces the communication overhead on the reverse link of the wireless system. We demonstrate that the proposed hierarchical video decomposition based optimal diversity power allocation employing limited CSI feedback can be formulated as a constrained optimization problem. Subsequently, it is demonstrated that the solution to this problem can be computed by solving an iterative sequence of convex cost minimization problems. A closed form expression for the optimal power allocation is presented for the convex optimization problem at each iterative step. Simulation results demonstrate significant performance improvement of the proposed optimal power allocation schemes over the suboptimal equal power allocation scheme.","PeriodicalId":210916,"journal":{"name":"2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126765038","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: 2

The effects of variable sound speed on localization in Underwater Sensor Networks 变声速对水下传感器网络定位的影响

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096663

S. Misra, Ashim Ghosh

{"title":"The effects of variable sound speed on localization in Underwater Sensor Networks","authors":"S. Misra, Ashim Ghosh","doi":"10.1109/ATNAC.2011.6096663","DOIUrl":"https://doi.org/10.1109/ATNAC.2011.6096663","url":null,"abstract":"The field of Underwater Sensor Networks attempts to set up a Wireless Sensor Network (WSN) underwater for the purpose of exploration and monitoring by addressing challenges unique to the oceanic environment. In an UnderWater Sensor Network (UWSN), the knowledge of the location of a node can both improve the operation of the network (e.g. geographical routing) and add significance to the data that is collected. Many localization techniques used in UWSN are based on multilateration. Multilateration assumes the underwater speed of sound to be constant. However, several studies have shown that this speed varies with salinity, temperature and pressure. This variation incorporates an error into the results obtained from localisation. This paper presents an algorithm to find an estimate of the underwater speed of sound at a particular location and time. This estimate can be provided to multilateration to improve the localization accuracy. The existing multilateration technique need not be modified. Simulation studies show that our algorithm improves the localization accuracy over a pure multilateration technique that assumes the underwater speed of sound to be 1500 m/s.","PeriodicalId":210916,"journal":{"name":"2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132277239","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: 24

On the η-µ/gamma and the λ-µ/gamma multipath/shadowing distributions 关于η-µ/ γ和λ-µ/ γ的多径/阴影分布

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096671

P. Sofotasios, S. Freear

引用次数: 41

Impact of MAC parameters on the performance of IEEE 802.15.4 MAC protocol with ACK frame transmission MAC参数对带ACK帧传输的IEEE 802.15.4 MAC协议性能的影响

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096645

S. Wijetunge, U. Gunawardana, R. Liyanapathirana

引用次数: 3

Automated Micro-Wave(MW) antenna alignment of Base Transceiver Stations: Time optimal link alignment 基站微波(MW)天线自动对准:时间优化链路对准

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096675

A. Hassan, A. Hoque, A. Moldsvor

引用次数: 8

IP storage and stored content management using SIP presence server with XML database IP存储和存储内容管理使用SIP存在服务器带XML数据库

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096631

Y. Nomoto, Tomonori Kuzukawa, Y. Ishibashi

{"title":"IP storage and stored content management using SIP presence server with XML database","authors":"Y. Nomoto, Tomonori Kuzukawa, Y. Ishibashi","doi":"10.1109/ATNAC.2011.6096631","DOIUrl":"https://doi.org/10.1109/ATNAC.2011.6096631","url":null,"abstract":"There are few studies of content delivery systems specializing in consumer generated video (CGV) exchange, and as for the real exchange technique, exchange through the file server in a network has become mainstream. A solution using P2P has been also proposed, but a structure for safe content exchange guaranteed by the service provider is necessary for the further spread of a service. Therefore, we propose a distributed storage video on demand system (DSVS) for delivering CGV content stored in a user IP storage. It is important to know how the server in a network manages stored CGV(s), including the storage. A standard system for managing the storage and also the stored files does not exist. Thus, we propose a storage management system, a part of our DSVS, that uses a session initiation protocol presence function and an XML database management system. These are additional functions of the IP multimedia subsystem, which is a core system of the next generation network (NGN). In Japan, access services for the IPv6 Internet and an NGN with one IPv6 address began in 2011. Therefore, the number of potential NGN users will increase with the spread of the IPv6 Internet access service. We show that our system can become the foundation of various content delivery services due to the versatility of the storage management capability of our DSVS.","PeriodicalId":210916,"journal":{"name":"2011 Australasian Telecommunication Networks and Applications Conference (ATNAC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129574916","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: 1

Exact performance analysis of multihop relaying systems operating in co-channel interference using the generalized transformed characteristic function 用广义变换特征函数分析同信道干扰下多跳中继系统的精确性能

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096652

N. Beaulieu, Kasun T. Hemachandra

引用次数: 6

Experiences from the MANIAC Challenge MANIAC挑战赛的经验

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096629

Heiko Will, F. Juraschek, M. Günes, J. Schiller

引用次数: 1

Impulsive noise reduction of a narrowband power line communication using optimal nonlinearity technique 基于最优非线性技术的窄带电力线通信脉冲降噪

2011 Australasian Telecommunication Networks and Applications Conference (ATNAC) Pub Date : 2011-12-08 DOI: 10.1109/ATNAC.2011.6096646

Mehdi Korki, N. Hosseinzadeh, H. Vu, T. Moazzeni, C. Foh

引用次数: 22