无线互联科技最新文献

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Enhancement of cell-based decentralized Key Management in vehicular communication networks 车载通信网络中基于小区的分散密钥管理的改进
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940900
M. Park, Gi-Poong Gwon, S. Seo
{"title":"Enhancement of cell-based decentralized Key Management in vehicular communication networks","authors":"M. Park, Gi-Poong Gwon, S. Seo","doi":"10.1109/WIRELESSVITAE.2011.5940900","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940900","url":null,"abstract":"Cell-based Decentralized Key Management (CDKM) was proposed to manage a group key for secure multicast in mobile cellular networks efficiently. It achieves better performance with less management overhead than other currently available schemes by dividing a group into the cell-based multiple subgroups and delegating key management functions to each base station governing each subgroup. However, room for improvement still remains in the subgroup size affecting the rekeying overhead directly. This paper proposes the enhanced CDKM which improves the rekeying performance through the reduction of the size of the subgroup, and adopts this scheme to group key management in vehicular communication networks. The proposed scheme further splits the cell-based subgroups into several segments, which is simple but very efficient way to reduce the rekeying overhead. We prove mathematically that the additional split enhances the performance, and show the proposed scheme can improve the rekeying performance by up to 15% over the original CDKM and by at least 80% over the existing schemes.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"57 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86475394","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
FPGA based FFT algorithm implementation in WiMAX communications system 基于FPGA的FFT算法在WiMAX通信系统中的实现
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940865
K. Harikrishna, T. Rao
{"title":"FPGA based FFT algorithm implementation in WiMAX communications system","authors":"K. Harikrishna, T. Rao","doi":"10.1109/WIRELESSVITAE.2011.5940865","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940865","url":null,"abstract":"Increasing the performance is the best criterion for developing any communication system. The work presented here is aimed at increasing the speed & performance of the OFDMA (Orthogonal Frequency-Division Multiple Access) modulator and demodulator. This paper presents a high level implementation of a high performance FFT for OFDM Modulator and Demodulator. The design has been coded in Verilog and targeted into Xilinx Spartan 3 FPGAs. The developed OFDMA communication structure is then targeted to the OFDMA based WiMAX communication modules, for increasing their efficiency by utilizing FPGA based FFT algorithm.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"16 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75490898","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
Context-aware reconfigurable interoperability for vertical handover in wireless communications 无线通信中垂直切换的上下文感知可重构互操作性
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940879
Mihai Gavrilescu, Valentin Andrei, E. Popovici, Tiberius P. Beganu, R. Nastase, O. Fratu, S. Halunga
{"title":"Context-aware reconfigurable interoperability for vertical handover in wireless communications","authors":"Mihai Gavrilescu, Valentin Andrei, E. Popovici, Tiberius P. Beganu, R. Nastase, O. Fratu, S. Halunga","doi":"10.1109/WIRELESSVITAE.2011.5940879","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940879","url":null,"abstract":"In this paper we describe a context-aware reconfigurable system, which implements the IEEE 802.21 Media Independent Handover (MIH) standard for interoperability between wireless hybrid access networks. The proposed approach uses vertical handover prediction algorithms to improve the resource management decisions, through access to our Web Service implementation of the Media Independent Information Service (MIIS), which stores previously acquired information about surrounding hybrid access networks. Various prediction alternatives are discussed, and two proposed algorithms are evaluated, on our prototype implementation of the system.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"27 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87267832","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: 8
Delivery of eHealth and eInclusion services for elderly people with mild dementia 为患有轻度痴呆症的老年人提供电子保健和电子包容服务
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940882
S. Kyriazakos, N. Prasad
{"title":"Delivery of eHealth and eInclusion services for elderly people with mild dementia","authors":"S. Kyriazakos, N. Prasad","doi":"10.1109/WIRELESSVITAE.2011.5940882","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940882","url":null,"abstract":"Delivery of eHealth and eInclusion services is a topic that has already been addressed the last decades. The evolution of Internet and technology in general, enable the deployment of reliable infrastructures to even run life critical services, while inclusion of people who live in remote places is achieved through different channels available. Nevertheless systems and services for elderly people with mild dementia, which is a population that is rapidly increasing, is not tackled yet in a holistic way. There are services available that can serve some of the user requirements, but there is a clear lack of integrated solutions focusing on the elderly. Obviously this is a technological and social challenge and has triggered the initiative of ISISEMD project, which is described in this paper.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"15 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87781704","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
Cognitive Radio and the Frequency Resource Protocol (FRP) 认知无线电和频率资源协议(FRP)
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940891
T. Maseng, Magnus Skjegstad
{"title":"Cognitive Radio and the Frequency Resource Protocol (FRP)","authors":"T. Maseng, Magnus Skjegstad","doi":"10.1109/WIRELESSVITAE.2011.5940891","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940891","url":null,"abstract":"A distributed architecture for a commercial system for sharing the frequency spectrum is presented. This is obtained by running a new protocol called Frequency Resource Protocol. There are many challenges remaining, but none of these appear unrealistic to solve. Once a trial system has been demonstrated which is underway, the commercial incentives for launching this in terms of a realistic business model remains to be presented and will hopefully result in a standard used by many.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90235669","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
Towards a layer-less network architecture — A case from Wireless Sensor Networks 迈向无层网络架构——以无线传感器网络为例
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940895
Ram Kumar, F. Reichert
{"title":"Towards a layer-less network architecture — A case from Wireless Sensor Networks","authors":"Ram Kumar, F. Reichert","doi":"10.1109/WIRELESSVITAE.2011.5940895","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940895","url":null,"abstract":"Ad hoc and Wireless Sensor Networks (WSNs) form a challenging domain for existing network protocols and paradigms to fit into. The traditional models conceived for wired networking and adapted for wireless and mobile environments provide an inefficient and ungraceful outcome when exercised against highly dynamic and highly mobile nature of ad hoc wireless sensor networks. Efforts are being made to tweak existing (and sometimes create from scratch) principles and models that can provide a concrete framework for such newer paradigms. The momentum of the traditional layered architecture carried over from the wired networks to infrastructure based wireless networks pushes the same approaches as the de facto standard for the new ad hoc WSNs. We argue that such an approach conflicts with the long term prospects of the new paradigms. Using a network architecture designed for static nodes, albeit with tweaks (such as cross-layering), to address a completely different model of communications with modalities beyond the scope of both wired and infrastructure based wireless networks is not the right path to follow. We present a new way of thinking about the network abstractions, away from the hierarchical layers, towards network functionality as layer-less services. Further, we propose the approaches that can be utilized to standardize this approach in the long term.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"115 1","pages":"1-9"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78722953","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
Mutual information of block-faded MIMO multiple access channels with channel estimation error 带信道估计误差的块衰落MIMO多址信道互信息
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940893
E. Dall’Anese, S. Pupolin
{"title":"Mutual information of block-faded MIMO multiple access channels with channel estimation error","authors":"E. Dall’Anese, S. Pupolin","doi":"10.1109/WIRELESSVITAE.2011.5940893","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940893","url":null,"abstract":"In this paper, the effect of a training-based linear minimum mean squared error (LMMSE) channel estimator on the sum mutual information of the multiple-input multiple-output (MIMO) multiple access channel (MAC) is investigated. Adhering to the classical channel estimation philosophy, the overarching contribution of the present work consists in bridging pure information-theoretic bounds on the sum mutual information with practical system parameters that are inherent to the LMMSE channel estimator. The unboundness of the mutual information and conservation of the multiplexing gain is shown and, interestingly, the increase of the mutual information loss with respect of the perfect channel knowledge case with the increasing of the signal-to-noise-ratio (SNR) is revealed, with a close-form expression for the value bounding the loss for asymptotically high SNRs.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"29 24 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82936265","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
Regulatory aspects and opportunities of TV white spaces in India 印度电视空白空间的监管方面和机遇
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940875
P. Balamuralidhar
{"title":"Regulatory aspects and opportunities of TV white spaces in India","authors":"P. Balamuralidhar","doi":"10.1109/WIRELESSVITAE.2011.5940875","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940875","url":null,"abstract":"Ever increasing demand for communication bandwidth to meet the needs of population across various demography of India is is in the focus of government, operators and technology providers. Need for managing Spectrum as a scarce resource is well understood and explorations for efficient spectrum utilization is a national priority. Dynamic shared and opportunistic spectrum access and schemes for utilization of TV white spaces are of interest to the stake holders. An overview of the digital dividend with cognitive access and related opportunities in the context of India is discussed in this paper.1","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"73 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87372507","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
Advances in D2D communications: Energy efficient service and device discovery radio D2D通信的进展:节能服务和设备发现无线电
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940857
K. Doppler, C. Ribeiro, Jarkko Kneckt
{"title":"Advances in D2D communications: Energy efficient service and device discovery radio","authors":"K. Doppler, C. Ribeiro, Jarkko Kneckt","doi":"10.1109/WIRELESSVITAE.2011.5940857","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940857","url":null,"abstract":"Device-to-Device communications with automated connectivity to sensors, machines and other users is an important enabler for a multitude of use cases with local social networks as one example. In this paper we focus on the main challenges to build a seamless user experience. In particular, we present a novel device beaconing scheme to facilitate service and device discovery. Moreover, the mechanism enables the exchange of small data packets and facilitates the connection setup of a suitable transport radio. We discuss the energy efficiency of the proposed device discovery mechanism and evaluate the capability to form a network in a residential scenario with different device densities.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"8 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82188293","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: 109
TVWS regulation and QoSMOS requirements TVWS法规和QoSMOS要求
无线互联科技 Pub Date : 2011-07-05 DOI: 10.1109/WIRELESSVITAE.2011.5940859
D. Noguet, Rohit Datta, P. Lehne, M. Gautier, G. Fettweis
{"title":"TVWS regulation and QoSMOS requirements","authors":"D. Noguet, Rohit Datta, P. Lehne, M. Gautier, G. Fettweis","doi":"10.1109/WIRELESSVITAE.2011.5940859","DOIUrl":"https://doi.org/10.1109/WIRELESSVITAE.2011.5940859","url":null,"abstract":"Regulatory regimes for opportunistic usage is being discussed in many countries for the so called TV White Space channels. The key objective of the regulators is to ensure that opportunistic systems can coexist with incumbent systems without causing harmful interference. However, they do not specify how these opportunistic systems must be designed to guarantee these requirements and to exploit White Spaces in an optimal way. This paper gathers key regulatory rules for opportunistic usage in the TV bands, and illustrates how these rules are turned into technical requirements within the framework of the European FP7 QoSMOS project.","PeriodicalId":68078,"journal":{"name":"无线互联科技","volume":"39 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2011-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80716779","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: 9
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