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A Network Oriented Perspective on the Personalization of Media Streaming 面向网络的流媒体个性化研究
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.22
Mário Serafim Nunes, C. Patrikakis, N. Papaoulakis
{"title":"A Network Oriented Perspective on the Personalization of Media Streaming","authors":"Mário Serafim Nunes, C. Patrikakis, N. Papaoulakis","doi":"10.1109/GLOCOMW.2008.ECP.22","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.22","url":null,"abstract":"In this paper, the issue of real time personalized media streaming distribution over different networks is presented. Alternative scenarios are presented, together with details on implementation and discussion on the pros and cons, in terms of implementation complexity, traffic overhead and provided functionality. The solutions have been developed and are currently under evaluation in the context of My-e-Director 2012, an FP7 European funded project in the area of Networked Media. This project aims at providing an interactive, personalized broadcasting platform, which enables end-users to have access on innovative services and focusing on large scale athletic events.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124146825","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
Multiuser MIMO Downlink: Multiplexing Gain Without Free Channel Information 多用户MIMO下行链路:没有自由信道信息的多路复用增益
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.90
U. Salim, D. Slock
{"title":"Multiuser MIMO Downlink: Multiplexing Gain Without Free Channel Information","authors":"U. Salim, D. Slock","doi":"10.1109/GLOCOMW.2008.ECP.90","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.90","url":null,"abstract":"A multiuser MIMO system is considered with no initial assumption of channel state information (CSI) at any of the receivers or the BS transmitter. For a system working under frequency-division duplexing (FDD) mode, simple practically realizable transmission strategy is proposed which provides necessary channel state information to both sides with minimal resource utilization for downlink (DL) data transmission. For the given transmission strategy, high SNR degrees of freedom (DOF) for the DL channel are specified. If the users have data to transmit in the uplink (UL) direction, with no extra burden of training, full multiplexing gain of the multiple-access channel (MAC) can be achieved. Thus the given strategy makes the system fully scalable for the data transmission in both directions.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126650473","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
Opportunistic Two-Hop Relays for OFDMA Cellular Networks OFDMA蜂窝网络的机会两跳中继
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.91
G. Calcev, J. Bonta
{"title":"Opportunistic Two-Hop Relays for OFDMA Cellular Networks","authors":"G. Calcev, J. Bonta","doi":"10.1109/GLOCOMW.2008.ECP.91","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.91","url":null,"abstract":"In this paper, we investigate the benefits of two-hop opportunistic relay in time division duplex (TDD) OFDMA cellular network configurations. The paper starts with a short analytical model for the two-hop opportunistic relay. The model expresses the probability of finding a suitable relay node in the presence of lognormal fading and it allows the computation of the expected number of out-of-coverage nodes, as well as the end- to-end spectrum efficiency increase due to opportunistic relaying. The paper then presents results for Monte Carlo simulations of opportunistic relay in some realistic scenarios. Specifically, the simulations consider two scenarios. The first scenario uses the propagation model and a wide-area 19-cell configuration specified in 802.16 OFDMA cellular standard evaluation methodologies. In the second scenario, a Manhattan-like 19 cell topology is used. Our results evaluate the benefits of the opportunistic relay in both scenarios in terms of coverage extension and throughput increase.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133219024","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
Spatial Diversity with LDPC Codes LDPC码的空间分异
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.11
S. Sharma, R. Khanna
{"title":"Spatial Diversity with LDPC Codes","authors":"S. Sharma, R. Khanna","doi":"10.1109/GLOCOMW.2008.ECP.11","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.11","url":null,"abstract":"Wireless links are impaired by random fluctuations in signal level across space, time and frequency known as fading. Spatial diversity is an attractive solution to improve system capacity as well as system performance by providing array gain or increased SNR. Satellites (GEO,MEO) and High Altitude platform stations(HAPS) also exploit spatial diversity in LOS/NLOS envirornment. Exact nature of the diversity system depends on satellite antenna configuration. One of such configuration is SIMO diversity system that realizes receive diversity. LDPC codes have outstanding performance in some cases than that of turbo codes, with iterative decoding algorithm which is easy to implement and parallelizable in hardware. LDPC codes when implemented along with SIMO system with Maximum Ratio Combining (MRC) under the combination of AWGN and multipath fading is optimum from the standpoint of maximising SNR at combiner output. In addition when operating in interference scenario optimum combining can be employed that maximizes the output SINR. In this paper it is shown that LDPC codes with optimum combining (LDPC-OC) system improves SINR by 1.98 dB and 2.62 dB with 3 and 4 receive antennas respectively in multipath fading channel in the presence of a single interferer.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132922111","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
GMSK Modulation over Weibull Fading Channels and its Impact on the Effective Transport Capacity of Ad Hoc Wireless Networks Weibull衰落信道上的GMSK调制及其对Ad Hoc无线网络有效传输容量的影响
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.86
I. Ghareeb, A. Abu Al Haija
{"title":"GMSK Modulation over Weibull Fading Channels and its Impact on the Effective Transport Capacity of Ad Hoc Wireless Networks","authors":"I. Ghareeb, A. Abu Al Haija","doi":"10.1109/GLOCOMW.2008.ECP.86","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.86","url":null,"abstract":"This paper derives a bit-error probability expression for the differential detection of Gaussian minimum shift keying (GMSK) signals with post-detection equal gain combining (EGC) in additive white Gaussian noise and slow frequency-nonselective independent not necessary identical Weibull fading channels, in which the diversity branches can have unequal signal-to-noise ratios (SNRs) as well as different severity parameters beta. Also, this paper studies the impact of this communication system on the effective transport capacity of wireless ad hoc networks when the nodes in the networks are distributed hexagonally. The derived expressions can be easily computed via numerical integration routines.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133612609","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: 3
Resource Sharing Principles for Vehicular Communications 车载通信资源共享原则
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.65
A. Kovács
{"title":"Resource Sharing Principles for Vehicular Communications","authors":"A. Kovács","doi":"10.1109/GLOCOMW.2008.ECP.65","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.65","url":null,"abstract":"Specific congestion control mechanisms for wireless vehicular communications have been studied extensively in previous research. Various mechanisms with important functionality for a scalable vehicular communications system design have been identified, and their applicability for certain communications scenarios has been studied in the past. Definition of overall resource utilization principles for guiding functional specification and complementary design of congestion control tools has been a missing aspect of previous research. This paper proposes a suitable scalability principle for each major vehicular communication scenario: periodic safety broadcasts, event-driven safety broadcasts, and unicast message forwarding. Each scenario section investigates an appropriate design of individual congestion control tools for the implementation of related scalability principle. It is then described how individual tools shall complement one another.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133790032","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: 6
Modeling Roadside Attacker Behavior in VANETs 在VANETs中模拟路边攻击者行为
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.63
T. Leinmuller, R. Schmidt, E. Schoch, A. Held, G. Schafer
{"title":"Modeling Roadside Attacker Behavior in VANETs","authors":"T. Leinmuller, R. Schmidt, E. Schoch, A. Held, G. Schafer","doi":"10.1109/GLOCOMW.2008.ECP.63","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.63","url":null,"abstract":"Communication using VANETs is commonly seen as the next milestone for improving traffic safety. Vehicles will be enabled to exchange any kind of information that helps to detect and mitigate dangerous situations. Security research in the past years has shown that VANETs are endangered by a plethora of severe security risk. Subject of this work is the modeling of attackers that target active safety applications in VANETs. Through a risk analysis, this work identifies assets, threats and potential attacks in inter-vehicle communication. The risk analysis shows that the most serious threat arises from a quasi-stationary (road-side) attacker that distributed forged warning messages. This attacker is discussed more deeply. We show the degrees of freedom that are available for position forging and find thereby two attacks that demand attention: single position forging having low effort compared to sophisticated movement path forging having a potentially high influence on road traffic safety.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"61 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113977971","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: 58
Evaluation of Various Interference Models for Joint Routing and Scheduling in Wireless Mesh Networks 无线Mesh网络联合路由调度中各种干扰模型的评估
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.84
Leonardo Badia, Alessio Botta
{"title":"Evaluation of Various Interference Models for Joint Routing and Scheduling in Wireless Mesh Networks","authors":"Leonardo Badia, Alessio Botta","doi":"10.1109/GLOCOMW.2008.ECP.84","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.84","url":null,"abstract":"We explore radio resource allocation in wireless mesh networks, namely we study how to determine a space- and time-division pattern of transmissions, to deliver traffic to gateway nodes. We highlight link scheduling and routing issues, which we investigate in a cross-layer framework. To this end, an integer linear program is presented, where diverse constraints affect resource allocation; in particular, we focus in this paper on the key role played by the characterization of radio interference. Finally, we obtain numerical results through a genetic algorithm, and we are able to show that the wireless interference model adopted strongly affects the performance of the radio resource allocation; thus, an accurate representation of the wireless channel is necessary to obtain meaningful results.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"31 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114103186","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
Resource Allocation in OFDMA Based Cooperative Relay Networks 基于OFDMA的协作中继网络资源分配
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.95
D. Zhang, Youzheng Wang, Jianhua Lu
{"title":"Resource Allocation in OFDMA Based Cooperative Relay Networks","authors":"D. Zhang, Youzheng Wang, Jianhua Lu","doi":"10.1109/GLOCOMW.2008.ECP.95","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.95","url":null,"abstract":"In this paper, we focus on resource allocation in OFDMA based cooperative cellular networks with multiple sources, multiple relays and a single destination. Four typical relay schemes are discussed, namely, Amplify-and-Forward (AF) and Decode-and-Forward (DF) both with or without diversity. We formulate two general optimization problems incorporating single-carrier allocation and multi-carrier allocation respectively. Since the formulated problem is a Binary Integer Problem (BIP), an innovative evolutional based algorithm is proposed for solving the relay selection and subcarrier allocation problem. The new algorithm is low in complexity, efficient in performance illustrated by both analytical and numerical results.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122413508","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: 11
A Millimeter Wave Radar for Planetary Missions 用于行星任务的毫米波雷达
2008 IEEE Globecom Workshops Pub Date : 2008-11-01 DOI: 10.1109/GLOCOMW.2008.ECP.4
C. Dionisio, V. Dainelli, M. Lucente, M. Noce
{"title":"A Millimeter Wave Radar for Planetary Missions","authors":"C. Dionisio, V. Dainelli, M. Lucente, M. Noce","doi":"10.1109/GLOCOMW.2008.ECP.4","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2008.ECP.4","url":null,"abstract":"Italy, with the main objectives to collect the science data of the Moon and Mars, through the Italian Space Agency has recently funded a study for Moon exploration whose results have been summarized in the report - \"The Moon: an unavoidable step in the exploration of the Solar System\" by A. Coradini, et alia. Moreover, a new study is in progress named MAGIA, (kalian acronym standing for Mission for Lunar Altimetry, Gravimetry and Geochemistry) where microwave and optical payloads are embarked to fuse data for Moon exploration. The mission foresees the use of several payloads for Moon and planetary measurement, including an innovative radar operating at millimeter wavelenghts. This paper reports radar design RHI is proposing to cope with planetary exploration challenging requirement in terms of topography and surface composition measurements and physical constraints in terms of mass and power consumption.","PeriodicalId":410930,"journal":{"name":"2008 IEEE Globecom Workshops","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121359568","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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