With the increasing popularity of multimedia applications, quality of services (QoS) support in wireless communication networks has become important. Along with the enhanced distributed channel access (EDCA) proposed in IEEE 802.e MAC protocol, admission control is a very important component for provision of guaranteed QoS parameters in wireless local area networks (WLANs). Based on the characteristics of real-time application, this study proposes a new adaptive QoS admission control in which quality access point (QAP) dynamically adjusts the QoS level of existing flows so as to provide new data flows acceptable QoS when sufficient resources are not available. The analysis shows that this enhancement admits significantly more voice/video flows into the WLANs than existing admission control mechanism.
随着多媒体应用的日益普及，无线通信网络对服务质量(QoS)的支持变得越来越重要。随着IEEE 802中提出的增强型分布式信道接入(EDCA)。在无线局域网(wlan)的MAC协议中，准入控制是提供有保证的QoS参数的重要组成部分。本文根据实时应用的特点，提出了一种新的自适应QoS接纳控制方法，即质量接入点(quality access point, QAP)动态调整现有流的QoS水平，以便在资源不足的情况下为新的数据流提供可接受的QoS。分析表明，与现有的允许控制机制相比，这种增强允许更多的语音/视频流进入wlan。
{"title":"Adaptive QoS Admission Control for IEEE 802.11e Network","authors":"Hua Qing, K. Yoshigoe","doi":"10.1109/CCNC08.2007.137","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.137","url":null,"abstract":"With the increasing popularity of multimedia applications, quality of services (QoS) support in wireless communication networks has become important. Along with the enhanced distributed channel access (EDCA) proposed in IEEE 802.e MAC protocol, admission control is a very important component for provision of guaranteed QoS parameters in wireless local area networks (WLANs). Based on the characteristics of real-time application, this study proposes a new adaptive QoS admission control in which quality access point (QAP) dynamically adjusts the QoS level of existing flows so as to provide new data flows acceptable QoS when sufficient resources are not available. The analysis shows that this enhancement admits significantly more voice/video flows into the WLANs than existing admission control mechanism.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130190389","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}
To improve mobile security and preserve the scarce resources of power and processor capabilities of these clients, this research presents a unique design and proof-of-concept implementation of a hardware-based intrusion protection system module that provides external deep packet inspection server-like security. As a result, the detection and prevention of application-layer-attacks as well as a wide variety of others do not reach the user's mobile device (or desktop) without an appreciable degradation in performance.
{"title":"Mobile Security Using Separated Deep Packet Inspection","authors":"G. A. Jacoby, Shawn Mosley","doi":"10.1109/CCNC08.2007.113","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.113","url":null,"abstract":"To improve mobile security and preserve the scarce resources of power and processor capabilities of these clients, this research presents a unique design and proof-of-concept implementation of a hardware-based intrusion protection system module that provides external deep packet inspection server-like security. As a result, the detection and prevention of application-layer-attacks as well as a wide variety of others do not reach the user's mobile device (or desktop) without an appreciable degradation in performance.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133999049","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}
We demonstrate broadcatching in ad-hoc WLAN with mobile devices. Broadcatching is a combination of RSS (Really Simple Syndication) and BitTorrent peer-to-peer file sharing. RSS allows the users to subscribe to content channels creating a push-type user experience. The BitTorrent distributes the content load of the server to the participating end user devices. For the service provider the demonstrated technology enables a web based distribution channel to deliver media to a large group of end users. The infrastructure costs for a service provider are low due to BitTorrent file sharing even when large media files are distributed with the system. As the processing and communication capabilities of a mobile device are limited compared to a fixed server, the efficiency in the distribution makes broadcatching ideal for mobile devices.
{"title":"Ad-Hoc WLAN Broadcatching","authors":"Janne Nöyränen, H. Kokkinen","doi":"10.1109/CCNC08.2007.272","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.272","url":null,"abstract":"We demonstrate broadcatching in ad-hoc WLAN with mobile devices. Broadcatching is a combination of RSS (Really Simple Syndication) and BitTorrent peer-to-peer file sharing. RSS allows the users to subscribe to content channels creating a push-type user experience. The BitTorrent distributes the content load of the server to the participating end user devices. For the service provider the demonstrated technology enables a web based distribution channel to deliver media to a large group of end users. The infrastructure costs for a service provider are low due to BitTorrent file sharing even when large media files are distributed with the system. As the processing and communication capabilities of a mobile device are limited compared to a fixed server, the efficiency in the distribution makes broadcatching ideal for mobile devices.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134253052","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}
M.S. Al-Shoukairi, K. Qaraqe, Mohamed-Slim Alouini, E. Serpedin
We analyze the performance of the hard handoff algorithm used in the 1xEV-DO Rev. A systems. A theoretical approach is presented to calculate the slot error probability (SEP). The approach enables us to evaluate the effects of filtering, hysteresis as well as the system introduced delay of handoff execution. Unlike previous work the model used considers multiple base stations (BS) and accounts for correlation of shadow fading affecting different signal powers received from different BS's. The theoretical results are verified over ranges of parameters of practical interest using simulations which are also used to evaluate the packet error rate (PER) and the number of handoffs.
{"title":"Performance of Hard Handoff in 1xEV-DO REV A. Systems with the Presence of Rayleigh and Correlated Lognormal Components","authors":"M.S. Al-Shoukairi, K. Qaraqe, Mohamed-Slim Alouini, E. Serpedin","doi":"10.1109/CCNC08.2007.14","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.14","url":null,"abstract":"We analyze the performance of the hard handoff algorithm used in the 1xEV-DO Rev. A systems. A theoretical approach is presented to calculate the slot error probability (SEP). The approach enables us to evaluate the effects of filtering, hysteresis as well as the system introduced delay of handoff execution. Unlike previous work the model used considers multiple base stations (BS) and accounts for correlation of shadow fading affecting different signal powers received from different BS's. The theoretical results are verified over ranges of parameters of practical interest using simulations which are also used to evaluate the packet error rate (PER) and the number of handoffs.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115081559","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}
This short paper outlines the innovative and promising work that we are undertaking to improve the quality of mobile services. We are investigating algorithms and system architectures that will allow mobile service providers to implement services and operational support systems - both in the infrastructure and on the mobile device - that improve efficiency, reduce complexity, and increase customer experience in a multitude of ways. Typical one-off solutions for mobile services - though effective in isolation - tend to focus on single "verticals", such as automotive, or healthcare. Our work focuses upon challenges of creating middleware that offers rich context-aware event logic to address a spectrum of issues across many verticals. When successfully implemented, the benefits will include: more efficient operations for service providers and more interesting, seamless, context-aware services for mobile customers.
{"title":"Seamless Mobile Context - Towards High Speed Context-Aware Event-Based Middleware","authors":"B. Falchuk, S. Loeb, E. Panagos","doi":"10.1109/CCNC08.2007.26","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.26","url":null,"abstract":"This short paper outlines the innovative and promising work that we are undertaking to improve the quality of mobile services. We are investigating algorithms and system architectures that will allow mobile service providers to implement services and operational support systems - both in the infrastructure and on the mobile device - that improve efficiency, reduce complexity, and increase customer experience in a multitude of ways. Typical one-off solutions for mobile services - though effective in isolation - tend to focus on single \"verticals\", such as automotive, or healthcare. Our work focuses upon challenges of creating middleware that offers rich context-aware event logic to address a spectrum of issues across many verticals. When successfully implemented, the benefits will include: more efficient operations for service providers and more interesting, seamless, context-aware services for mobile customers.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114292411","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}
The new generation vehicles will have many sophisticated systems such as drive-by-wire, navigation, traffic congestion control, road guidance, and advance crash warning. Already, dozens of onboard computers control complex vehicle functions. From time to time, an onboard computer needs reprogramming. Currently, dealers manually reprogram software in onboard computers via a wire based electrical connection. Updating software wirelessly is a preferred alternative to the manual method because the vehicle need not be physically present at a repair facility to perform the update. Wireless software reprogramming will save customers' and technicians' time and money. In this paper, we present a wireless download algorithm for reprogramming of vehicles' electronic control units, using current wireless technologies. Our algorithm proposes a hybrid infrastructure that combines wireless unicasting and multicasting data delivery.
{"title":"Wireless Reprogramming of Vehicle Electronic Control Units","authors":"Radovan Miucic, S. Mahmud","doi":"10.1109/CCNC08.2007.173","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.173","url":null,"abstract":"The new generation vehicles will have many sophisticated systems such as drive-by-wire, navigation, traffic congestion control, road guidance, and advance crash warning. Already, dozens of onboard computers control complex vehicle functions. From time to time, an onboard computer needs reprogramming. Currently, dealers manually reprogram software in onboard computers via a wire based electrical connection. Updating software wirelessly is a preferred alternative to the manual method because the vehicle need not be physically present at a repair facility to perform the update. Wireless software reprogramming will save customers' and technicians' time and money. In this paper, we present a wireless download algorithm for reprogramming of vehicles' electronic control units, using current wireless technologies. Our algorithm proposes a hybrid infrastructure that combines wireless unicasting and multicasting data delivery.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117162003","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}
This paper presents an approach to describe dynamic sensor-based applications using a declarative language called WADL. Dynamic sensor-based applications are characterized by the fact that measurement producers (sensors) and consumers are introduced or removed from an execution environment at run-time. Supporting this degree of dynamism is usually done programmatically, and the WADL intends to simplify this task and to provide developers with an explicit view of the system architecture, while supporting its dynamic evolution. The paper describes the WADL, its implementation on top of the OSGi WireAdmin Service, and some experimentation results.
{"title":"An Architecture Description Language for Dynamic Sensor-Based Applications","authors":"H. Cervantes, D. Donsez, Lionel Touseau","doi":"10.1109/CCNC08.2007.40","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.40","url":null,"abstract":"This paper presents an approach to describe dynamic sensor-based applications using a declarative language called WADL. Dynamic sensor-based applications are characterized by the fact that measurement producers (sensors) and consumers are introduced or removed from an execution environment at run-time. Supporting this degree of dynamism is usually done programmatically, and the WADL intends to simplify this task and to provide developers with an explicit view of the system architecture, while supporting its dynamic evolution. The paper describes the WADL, its implementation on top of the OSGi WireAdmin Service, and some experimentation results.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"364 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115273772","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}
We study OFDM symbol interleaver design for gigabit per second (Gbps) wireless communications over the millimeter-wave (mmWave) frequency band. A bit-reversal symbol interleaver is proposed, which significantly outperforms conventional block interleaver design. It is demonstrated that the new interleaver design can be naturally combined with FFT operation and simplifies the hardware implementation complexity, which is especially important for several Gbps throughput applications. Simple design parameters are also proposed which serve as new and effective metrics for interleaver designs.
{"title":"Symbol Interleaver Design in Gigabit Wireless Communications Systems","authors":"Huaning Niu, Pengfei Xia, Jisung Oh, C. Ngo","doi":"10.1109/CCNC08.2007.171","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.171","url":null,"abstract":"We study OFDM symbol interleaver design for gigabit per second (Gbps) wireless communications over the millimeter-wave (mmWave) frequency band. A bit-reversal symbol interleaver is proposed, which significantly outperforms conventional block interleaver design. It is demonstrated that the new interleaver design can be naturally combined with FFT operation and simplifies the hardware implementation complexity, which is especially important for several Gbps throughput applications. Simple design parameters are also proposed which serve as new and effective metrics for interleaver designs.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"181 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121687850","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}
X. Costa, Paolo Favaro, A. Zubow, D. Camps-Mur, J. Aráuz
WiMAX is one of the most promising technologies to provide broadband wireless access in the near future. In this paper we identify a key element for the performance of a WiMAX network, the DL-MAP packing algorithm, which mainly determines the usage efficiency of the available radio resources and investigate potential differences that could appear between WiMAX equipment vendors in the maximum capacity of the system due to the packing approach used. Our results show that the performance of simple DL-MAP packing algorithms might be significantly outperformed by more complex ones resulting in a clear differentiation factor among manufacturers.
{"title":"On the Challenges for the Maximization of Radio Resources Usage in WiMAX Networks","authors":"X. Costa, Paolo Favaro, A. Zubow, D. Camps-Mur, J. Aráuz","doi":"10.1109/CCNC08.2007.208","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.208","url":null,"abstract":"WiMAX is one of the most promising technologies to provide broadband wireless access in the near future. In this paper we identify a key element for the performance of a WiMAX network, the DL-MAP packing algorithm, which mainly determines the usage efficiency of the available radio resources and investigate potential differences that could appear between WiMAX equipment vendors in the maximum capacity of the system due to the packing approach used. Our results show that the performance of simple DL-MAP packing algorithms might be significantly outperformed by more complex ones resulting in a clear differentiation factor among manufacturers.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"92 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122721478","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}
In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect with wireless access points (APs). However, the speed of vehicles is so fast that the channel condition between the terminals and the APs constantly changes because of changing path-loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce relative speed between user terminals and APs by using an inter-vehicle packet relay technique. If a terminal can send or receive data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and path-loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Moreover, we evaluate interference in the overlapped zone between two AP areas. From the evaluation, we show that our packet relays do not cause a problem in interference between areas.
{"title":"Performance Evaluation of Inter-Vehicle Packet Relay for Fast Mobile Road-Vehicle Communication","authors":"Takayuki Yamada, R. Shinkuma, Tatsuro Takahashi","doi":"10.1109/CCNC08.2007.54","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.54","url":null,"abstract":"In conventional road-vehicle communication systems, user terminals in the vehicles have to directly connect with wireless access points (APs). However, the speed of vehicles is so fast that the channel condition between the terminals and the APs constantly changes because of changing path-loss and time-varying fading. In this paper, to compensate for such deterioration, we propose to reduce relative speed between user terminals and APs by using an inter-vehicle packet relay technique. If a terminal can send or receive data via other vehicles running at lower speeds, the relative speed will decrease, which suppresses the dynamic range of path loss and deterioration by fading. We evaluate our method by computer simulations using a geometric propagation model. In the simulations, phase difference between multiple paths and path-loss fluctuation within one frame duration affect the performance. From the results of the simulations, we validate our method. Moreover, we evaluate interference in the overlapped zone between two AP areas. From the evaluation, we show that our packet relays do not cause a problem in interference between areas.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124221921","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：