{"title":"Hybrid photonic-integrated electroabsorption optical vector modulator for 80G/100G applications","authors":"I. Kang","doi":"10.1109/WOCC.2009.5312793","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312793","url":null,"abstract":"We review recent developments of novel hybrid photonic-integrated devices consisting of AlGaInAs/InP electroabsorption modulators and a four-arm silica-on-silicon planar lightwave circuit optical interferometer. The device is format-agile and capable of generating various optical modulation formats, including spectrally-efficient formats such as Quadrature-Phase-Shift-Keying. We discuss the device technology platform and the device applications to 80/100 Gb/s optical transmission.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125372816","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":"Additional switching nodes: Not a panacea for congested wireless networks","authors":"Amit Mukhopadhyay, Zheng Zhao","doi":"10.1109/WOCC.2009.5312783","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312783","url":null,"abstract":"Traditionally, service providers have been adding Mobile Switching Centers (MSCs) in their wireless networks whenever they run out of capacity. In an analysis of a large metropolitan network, we observed something seemingly counter-intuitive: additional MSCs do not necessarily add call capacity and they can sometimes even cause decreased network capacity. The apparent anomaly can be intuitively explained by noting that it is the all important call capacity that brings revenue to the operator. A new MSC in a network will always enhance total processing capacity but its introduction will also result in increased inter-MSC signaling for mobility handling. For a given total processing capacity, as mobility handling demand goes up, the remaining capacity for call processing goes down. In this paper, we establish a methodology for predicting capacity exhaust in an expanding network and also present practical suggestions for avoiding network congestion. Even though the analysis was done for a network with traditional monolithic switches, the methodology can be applied towards next generation distributed architecture components as well.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126721764","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":"LTE peak rates analysis","authors":"Dongzhe Cui","doi":"10.1109/WOCC.2009.5312788","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312788","url":null,"abstract":"Wireless broadband Internet access providing IP based services to mobile users is growing rapidly worldwide. 3GPP Long Term Evolution (LTE) is the new 3GPP standard making use of latest technologies such as OFDMA based access, frequency based scheduling, MIMO and higher order modulation. With LTE substantial gains regarding capacity, the much higher peak data rates can be expected, while minimizing terminal complexity. In this paper, we provide a brief analysis of the LTE theoretical downlink and uplink peak rates based in the latest LTE standards. In order to demonstrate the LTE peak data rates at Lab, we also provide the practical peak rates in the ideal RF condition.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116908178","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":"Performance analysis of adaptive subcarrier allocation scheme to support QoS in Multiuser OFDM system","authors":"Jun Seok Yang, S. K. Park, J. Kwon","doi":"10.1109/WOCC.2009.5312791","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312791","url":null,"abstract":"Orthogonal Frequency Division Multiple Access (OFDMA) allows multiuser to make use of the same bandwidth as the single user OFDM for data transmission. This paper considers resource allocation algorithm which supports the user Quality of Service (QoS) with Mutiuser OFDM cellular system. In this paper, we discuss how to achieve QoS without wasting subcarriers after subcarrier allocation. A proposed method assigns subcarriers from users not satisfying QoS to users who can contribute to system capacity.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127141232","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":"Future U.S. wireless landscape and IMS rollout","authors":"F. Lin","doi":"10.1109/WOCC.2009.5312786","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312786","url":null,"abstract":"Wireless landscape in the U.S. is very unique where both GSM/UMTS and CDMA/1xEV-DO technologies thrive. With emergence of mobile broadband access technologies such as WiMAX and LTE on the horizon, major U.S. operators all have announced their strategies for path forward to remain competitive in the mobile service market. In parallel, the IP Multimedia Subsystem (IMS) has firmly taken its position since 2006 as the common service architecture for next generation networks including both fixed and mobile accesses. Nevertheless, the rollout of IMS is not as fast as its standards development and more operators' commitment is seen on fixed networks than on mobile networks. This paper first presents a perspective of future U.S. wireless landscape in terms of major operators' strategy in supporting mobile broadband services. It then discusses the current status of the IMS rollout in the U.S. including the deployment issues in mobile networks and the deployment situation in fixed networks. Finally, the paper concludes with an analysis of important issues in the future development of mobile broadband and IMS.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127150154","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":"Simple security using flow data","authors":"Kenichi Futamura","doi":"10.1109/WOCC.2009.5312784","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312784","url":null,"abstract":"Malware attacks cause billions of dollars in economic damage worldwide yearly, and attackers are becoming smarter. We examine techniques for detecting worm propagation in a network using flow-level data. While worm exploits may be difficult to detect due to the wide range of payloads, the propagation phase of a worm is generally much easier to recognize. We examine this step and present one simple method for detecting network worms with no previously known signatures.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131286212","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":"Adaptive mean shift for target- tracking in FLIR imagery","authors":"Yafeng Yin, H. Man","doi":"10.1109/WOCC.2009.5312895","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312895","url":null,"abstract":"In this paper, we present a novel adaptive mean-shift tracker for tracking moving targets in the FLIR imagery, captured from an airborne moving platform. First, each target's position is manually marked at the first frame to initialize the adaptive mean-shift based tracker. For each target, multiple different features are extracted from both the targets and background during tracking, and an on-line feature ranking method is deployed to adaptively select the most discriminative feature for the mean-shift iteration. In addition, to compensate the motion of the moving platform, a block matching method is applied to compute the motion vector, which will be used in the RANSAC algorithm to estimate the affine model for global motion. We test our method on the AMCOM FLIR data set, the results indicate that our Adaptive mean-shift tracker can track each target accurately and robustly.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122610669","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":"Wireless high-definition services over optical fiber access networks","authors":"Z. Jia","doi":"10.1109/WOCC.2009.5312847","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312847","url":null,"abstract":"We experimentally demonstrate key technologies to further explore the converged benefits of the optical and wireless systems to offer wireless high-definition (HD) services for both fixed and mobile users. These technologies include spectrum-efficient multi-band generation and dispersion-tolerant transmission, and transport feasibility study for flexible optical routing using multiple reconfigurable optical add/drop multiplexers (ROADMs). Using the developed system, we successfully implement the testbed trial on the delivery of uncompressed 270-Mb/s SDTV and 1.485-Gb/s HDTV video signals over optical fiber and air links.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117107433","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}
Xiaowen Mang, Y. Levy, Carolyn R. Johnson, D. Hoeflin
{"title":"Admission control for VoIP calls with heterogeneous codecs","authors":"Xiaowen Mang, Y. Levy, Carolyn R. Johnson, D. Hoeflin","doi":"10.1109/WOCC.2009.5312782","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312782","url":null,"abstract":"As VoIP services proliferate due to rapid advances in technology and market demands, service providers are aggressively looking for better ways to offer VoIP services to customers including support of different codec technologies via a single network access point. This service flexibility introduces major traffic engineering challenges, especially when supporting a mix of data and voice services. In order to guarantee individual source's call blocking probability, intelligence must be added to the call admission process. To tackle the issue, we propose an intelligent call blocking algorithm that is guided by a pre-defined blocking targets.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130554261","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":"End-to-end service reliability considerations for converged telecommunications networks","authors":"Xuemei Zhang, Carolyn R. Johnson","doi":"10.1109/WOCC.2009.5312785","DOIUrl":"https://doi.org/10.1109/WOCC.2009.5312785","url":null,"abstract":"Reliability metrics and modeling techniques have been successfully used to analyze the reliability of a system, which typically consists of hardware platforms and software running on top of the hardware platforms. In telecommunications applications, system level reliability evaluation and improvement activities are better-understood. However, measurements for assessing reliability of complex networks still need to be better defined and understood. This becomes particularly essential as evolving telecommunications networks are getting more complicated with diversified technologies, multimedia services and evolving infrastructure. Besides the traditional voice application, today's telecommunication networks support multimedia applications that blend text, voice and video services. These solutions deal with different access technologies (e.g., wireless and wireline) and often use network elements from different vendors. Moreover, different applications (e.g., games, gambling, bank transactions, etc.) can have very different reliability requirements and characteristics. This paper discusses reliability considerations in estimating and analyzing the end-to-end reliability of complicated telecommunications network solutions.","PeriodicalId":288004,"journal":{"name":"2009 18th Annual Wireless and Optical Communications Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130962431","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}