Bell Labs Technical Journal最新文献_第9页

Evolved Multimedia Broadcast Multicast Service in LTE: An Assessment of System Performance Under Realistic Radio Network Engineering Conditions LTE中的演进多媒体广播多播服务：现实无线电网络工程条件下的系统性能评估

Bell Labs Technical Journal Pub Date : 2013-08-28 DOI: 10.1002/bltj.21605

Alistair Urie, Ashok N. Rudrapatna, Chandrasekharan Raman, Jean-Marc Hanriot

{"title":"Evolved Multimedia Broadcast Multicast Service in LTE: An Assessment of System Performance Under Realistic Radio Network Engineering Conditions","authors":"Alistair Urie, Ashok N. Rudrapatna, Chandrasekharan Raman, Jean-Marc Hanriot","doi":"10.1002/bltj.21605","DOIUrl":"10.1002/bltj.21605","url":null,"abstract":"With the explosive and sustained growth of data usage on both 3G and 4G mobile broadband wireless networks, new techniques need to be found to deliver data to end users efficiently. One of the key drivers of that data demand is video. Evolved Multimedia Broadcast Multicast Service (eMBMS) is one technique in Long Term Evolution (LTE) that provides a broadcast bearer to deliver video content and file delivery to an unlimited number of users. This bearer makes use of multiple cell sites to build a “single frequency network” (SFN) zone with identical downlink transmission over part of the LTE Orthogonal Frequency Division Multiplexing (OFDM) waveform. The resulting signal is combined at the user equipment's antenna in such a way that what is normally a neighboring cell site contributing interference becomes the source of a useful signal, thus improving the overall information signal to interference ratio, as well as spectral efficiency. In this paper, eMBMS technology and architecture are presented along with estimates of achieved performance and the impact on radio network engineering. We conclude that while eMBMS may not be an efficient solution to offer nationwide contiguous services throughout a mobile network, it may be efficiently used across an entire metropolitan area and the surrounding “capacity limited” rural areas when using a low radio band such as 700 MHz or 800 MHz, offering an impressive spectral efficiency of 1.5 b/s/Hz. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 2","pages":"57-76"},"PeriodicalIF":0.0,"publicationDate":"2013-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21605","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51437144","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: 29

On the High Capacity lightRadio™ Metro Cell Design for Stadiums 体育场馆的高容量lightRadio™地铁单元设计

Bell Labs Technical Journal Pub Date : 2013-08-28 DOI: 10.1002/bltj.21606

Doru Calin, Aliye Özge Kaya, Bong Ho Kim, Kai Yang, Simon Yiu

{"title":"On the High Capacity lightRadio™ Metro Cell Design for Stadiums","authors":"Doru Calin, Aliye Özge Kaya, Bong Ho Kim, Kai Yang, Simon Yiu","doi":"10.1002/bltj.21606","DOIUrl":"10.1002/bltj.21606","url":null,"abstract":"Offering good quality of experience (QoE) in stadiums poses unprecedented challenges to wireless operators, due to extreme traffic conditions. During popular sporting events, there could be tens of thousands of active users packed into a relatively small area, sharing pictures and video clips through smartphone applications. This creates high traffic densities and drives requirements for high capacity, yet economically feasible solutions for stadiums. Ensuring high capacity in open environments with high interference such as these is a daunting task. In this paper we explain why Alcatel-Lucent's lightRadio™ metro cells offer a good solution for stadium deployments due to their particular ability to provide high “local” capacity. We demonstrate key design concepts employed to achieve a target capacity with lightRadio metro cells including the number of metro cells and their optimal locations, power levels, antenna patterns and orientation, and frequency reuse patterns. We further quantify the capacity benefits of using metro cells through a comprehensive performance analysis framework using Long Term Evolution (LTE) as an example. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 2","pages":"77-97"},"PeriodicalIF":0.0,"publicationDate":"2013-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51437156","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

Wireless Indoor Positioning: Effective Deployment of Cells and Auto-Calibration 无线室内定位:有效部署小区和自动校准

Bell Labs Technical Journal Pub Date : 2013-08-28 DOI: 10.1002/bltj.21614

Félix Barba Barba, Aaron Garrido Martin, Alfonso Fernández-Durán

{"title":"Wireless Indoor Positioning: Effective Deployment of Cells and Auto-Calibration","authors":"Félix Barba Barba, Aaron Garrido Martin, Alfonso Fernández-Durán","doi":"10.1002/bltj.21614","DOIUrl":"10.1002/bltj.21614","url":null,"abstract":"Establishing a precise location for wireless users while they are indoors is currently an important challenge. The triangulation techniques used for external locations are useless due to adverse effects like the lack of line-of-sight or to multipath propagation. Fingerprinting methods, which are based on the comparison of received signal strength (RSS) values measured by the mobile phone with a radiomap of RSS values recorded during the calibration phase, currently offer the best methods for indoor scenarios. However, they are also affected by problems like channel variability. In this paper, we propose two ways to improve the systems based on fingerprinting methods. The first method minimizes negative effects resulting from inadequate deployment of the radio frequency emitters and describes a method to determine the minimum number and the best way to locate them from initial layout and accuracy requirements. The second method increases accuracy thanks to an automatic radiomap recalibration technique that leverages the measurements reported by a small number of static reference points, strategically deployed in an indoors environment. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 2","pages":"213-235"},"PeriodicalIF":0.0,"publicationDate":"2013-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21614","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51437548","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

Long Term Evolution in High Speed Railway Environments: Feasibility and Challenges 高速铁路环境的长期演变:可行性与挑战

Bell Labs Technical Journal Pub Date : 2013-08-28 DOI: 10.1002/bltj.21615

Jaime Calle-Sánchez, Mariano Molina-García, José I. Alonso, Alfonso Fernández-Durán

{"title":"Long Term Evolution in High Speed Railway Environments: Feasibility and Challenges","authors":"Jaime Calle-Sánchez, Mariano Molina-García, José I. Alonso, Alfonso Fernández-Durán","doi":"10.1002/bltj.21615","DOIUrl":"10.1002/bltj.21615","url":null,"abstract":"Long Term Evolution (LTE) is considered to be the natural evolution for the current Global System for Mobile Communications–Railways (GSM-R) in high speed railway environments, not only for its technical advantages and increased performance, but also due to the current evolution of public communication systems. In railway environments, mission critical services, operation assistance services, and passenger services must be supported by reliable mobile communication systems. Reliability and availability are key concerns for railway operators and as a consequence, railway operators are usually conservative adopters of information and communication technologies (ICT). This paper describes the feasibility of LTE as a successor to GSM-R for new railway mobile communication systems. We identify key features of LTE as a technology and analyze its ability to support both the migration of current railway services and the provisioning of potential future ones. We describe the key challenges to address specific requirements for railway communication services including the provisioning of voice service in LTE networks, handover performance, multicast multimedia transmission, and the provisioning of group communications service and railway emergency calls. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 2","pages":"237-253"},"PeriodicalIF":0.0,"publicationDate":"2013-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21615","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51437571","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: 93

Overview 概述

Bell Labs Technical Journal Pub Date : 2013-08-28 DOI: 10.1002/bltj.21601

Alistair Urie, Reinaldo Valenzuela

引用次数: 0

Quantitative Analysis of Split Base Station Processing and Determination of Advantageous Architectures for LTE 拆分基站处理的定量分析与LTE优势架构的确定

Bell Labs Technical Journal Pub Date : 2013-05-30 DOI: 10.1002/bltj.21595

Uwe Dötsch, Mark Doll, Hans-Peter Mayer, Frank Schaich, Jonathan Segel, Philippe Sehier

{"title":"Quantitative Analysis of Split Base Station Processing and Determination of Advantageous Architectures for LTE","authors":"Uwe Dötsch, Mark Doll, Hans-Peter Mayer, Frank Schaich, Jonathan Segel, Philippe Sehier","doi":"10.1002/bltj.21595","DOIUrl":"10.1002/bltj.21595","url":null,"abstract":"Centralization of the baseband processing in radio access networks may reduce radio site operations costs, reduce capital costs, and ease implementation of multi-site coordination mechanisms such as coordinated multipoint transmission and reception (CoMP). However, the initial architecture proposals for a centralized Long Term Evolution (LTE) deployment using transport of radio samples require a high-bandwidth, low-latency interconnection network. This may be uneconomical, or it may only be cost effective for a limited number of sites. To mitigate that deficiency without sacrificing the benefits of centralized processing, we identified alternative interfacing options between central and remote units. To do so we analyzed possible splits of the Long Term Evolution (LTE) baseband processing chain for their bandwidth and latency requirements. Next, we analyzed the operational impacts of potential splits based on a number of criteria including ease of CoMP introduction, the possibility of realizing pooling gains, and the ability to update the system and introduce new features. Based on our results, we propose architectures that can leverage the benefits of centralization at a much-reduced cost. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 1","pages":"105-128"},"PeriodicalIF":0.0,"publicationDate":"2013-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21595","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"51437413","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: 234

Overview 概述

Bell Labs Technical Journal Pub Date : 2013-05-30 DOI: 10.1002/bltj.21589

Volker Hilt, Catherine Lefèvre

引用次数: 0

Transmitter-Controlled Adaptive Modulation: Concepts and Results 发射机控制的自适应调制:概念和结果

Bell Labs Technical Journal Pub Date : 2013-05-30 DOI: 10.1002/bltj.21597

Michael Timmers, Dirk Vanderhaegen, Danny Van Bruyssel, Mamoun Guenach, Jochen Maes

{"title":"Transmitter-Controlled Adaptive Modulation: Concepts and Results","authors":"Michael Timmers, Dirk Vanderhaegen, Danny Van Bruyssel, Mamoun Guenach, Jochen Maes","doi":"10.1002/bltj.21597","DOIUrl":"10.1002/bltj.21597","url":null,"abstract":"The continued growth of broadband traffic pushes wireline access network operators to continuously offer better service. Due to the large investments needed to upgrade to an all-fiber network, operators seek to boost performance over their existing copper-based infrastructure, while gradually evolving to a fiber network. As a result, Digital Subscriber Line (DSL) technology, which offers broadband over copper, has been drastically improving. The next generation of DSL will enable the continued cost-effective deployment of fiber in the access network by providing aggregate data rates up to 1 Gb/s. To keep operational costs down, this new DSL generation should enable self-installation. Therefore, it should be robust and adaptive to a wide range of time-varying channels. In this paper, we propose a novel technique based on hierarchical modulation to achieve this robustness. It adapts quickly to noise and interference dynamics in frequency and in time and allows the transmitter to select its preferred configuration without the need for an explicit communication of this configuration to the receiver. We present an overview of hierarchical modulation and how we aim to use these concepts in DSL. We further show with simulations that the receiver is able to blindly track the changes introduced by the transmitter and discuss how this protocol can be easily introduced in state-of-the-art systems. © 2013 Alcatel-Lucent.","PeriodicalId":55592,"journal":{"name":"Bell Labs Technical Journal","volume":"18 1","pages":"153-169"},"PeriodicalIF":0.0,"publicationDate":"2013-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/bltj.21597","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67852840","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: 4

Measuring the Impact of Redirecting and Offloading Mobile Data Traffic 测量重定向和卸载移动数据流量的影响

Bell Labs Technical Journal Pub Date : 2013-05-30 DOI: 10.1002/bltj.21594

Robert A. Novo, Christopher J. Davolos, Z. John Zhao

引用次数: 5

Recent Alcatel-Lucent Patents 最近的阿尔卡特朗讯专利

Bell Labs Technical Journal Pub Date : 2013-05-30 DOI: 10.1002/bltj.21600

引用次数: 0