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}
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}
Jaewoon Kim, Sekwon Kim, Youngjin Park, Soonwoo Lee, Y. Shin
We propose a selective detection scheme based on pulse repetition considering Bit Error Rate (BER) performance and complexity of noncoherent Ultra Wide Band (UWB) systems. To consider system complexity, the proposed scheme transmits the UWB signals by pulse repetition at the transmitter, like the conventional Pulse Repetition Coding (PRC). However, to effectively improve BER performance of the system, the proposed scheme performs selective detection by estimating the Signal-to-Noise Ratio (SNR) of the received pulse-repeated signal at the UWB receiver. Hence, the proposed scheme effectively improves BER performance of the noncoherent UWB systems without increase of the system complexity, as compared to the conventional PRC algorithm.
{"title":"A Selective Detection Scheme Based on Pulse Repetition for Noncoherent UWB Systems","authors":"Jaewoon Kim, Sekwon Kim, Youngjin Park, Soonwoo Lee, Y. Shin","doi":"10.1109/CCNC08.2007.27","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.27","url":null,"abstract":"We propose a selective detection scheme based on pulse repetition considering Bit Error Rate (BER) performance and complexity of noncoherent Ultra Wide Band (UWB) systems. To consider system complexity, the proposed scheme transmits the UWB signals by pulse repetition at the transmitter, like the conventional Pulse Repetition Coding (PRC). However, to effectively improve BER performance of the system, the proposed scheme performs selective detection by estimating the Signal-to-Noise Ratio (SNR) of the received pulse-repeated signal at the UWB receiver. Hence, the proposed scheme effectively improves BER performance of the noncoherent UWB systems without increase of the system complexity, as compared to the conventional PRC algorithm.","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":"129074535","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}
J. Wikman, J. Nurminen, H. Kokkinen, P. Muilu, M. Heikela
We will demonstrate how a common mainstream web application development stack, the so-called AMP stack, can be installed on a mobile phone and used for creating a mobile website that utilize the unique characteristics of a mobile personal device. By providing a widely used web application development environment also on the mobile phone, we foresee that the threshold for developing mobile Web sites effectively can be removed.
{"title":"Mobile Web Application Development Stack","authors":"J. Wikman, J. Nurminen, H. Kokkinen, P. Muilu, M. Heikela","doi":"10.1109/CCNC08.2007.291","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.291","url":null,"abstract":"We will demonstrate how a common mainstream web application development stack, the so-called AMP stack, can be installed on a mobile phone and used for creating a mobile website that utilize the unique characteristics of a mobile personal device. By providing a widely used web application development environment also on the mobile phone, we foresee that the threshold for developing mobile Web sites effectively can be removed.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"71 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":"132300052","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}
Minimizing energy consumption is an important challenge in wireless sensor networks. The proposal of reactive on-demand philosophy where routes are established only when required is a major step. But it still needs to keep information about routes. The constantly changing topology, however, makes the routing state upkeep difficult. Thus multi-path routing is usually used for robust data delivery. But it is inefficient in terms of energy and bandwidth consumption especially for the slightly larger data packets such as in image/video dissemination. In this paper, we present a gradient-based routing protocol which works without knowledge of the existence of any neighboring nodes hence manifests the property of robust performance and eliminates the latency as well as the overhead of state upkeep. The data forwarding is based on the gradient -a cost field which provides each sensor node the minimum energy cost path to forward sensing data hence the energy consumption is further improved. Simulation studies show that our protocol is more energy-efficient than comparable work like GRAB and is as robust as its multi-path delivery.
{"title":"A Robust and Energy-Efficient Approach for Image/Video Dissemination in WSNs","authors":"Pei Huang, Xi Yang, Yongdong Tan","doi":"10.1109/CCNC08.2007.153","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.153","url":null,"abstract":"Minimizing energy consumption is an important challenge in wireless sensor networks. The proposal of reactive on-demand philosophy where routes are established only when required is a major step. But it still needs to keep information about routes. The constantly changing topology, however, makes the routing state upkeep difficult. Thus multi-path routing is usually used for robust data delivery. But it is inefficient in terms of energy and bandwidth consumption especially for the slightly larger data packets such as in image/video dissemination. In this paper, we present a gradient-based routing protocol which works without knowledge of the existence of any neighboring nodes hence manifests the property of robust performance and eliminates the latency as well as the overhead of state upkeep. The data forwarding is based on the gradient -a cost field which provides each sensor node the minimum energy cost path to forward sensing data hence the energy consumption is further improved. Simulation studies show that our protocol is more energy-efficient than comparable work like GRAB and is as robust as its multi-path delivery.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"52 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":"133094646","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}
The digitalization of home multimedia brings with it increased numbers of different kind of new devices. Although adding new user experiences, this will significantly increase energy consumption at home and globally. In this article we present one potential solution to enable more aggressive power management in networked home devices. This solution is based on UPnP Low power which allows devices in power save modes to be discovered and waken up. It is also shown based on implemented prototype that efficient power management system can be built on top of UPnP low power, particularly if home router manufacturers support the UPnP low power proxy service in their devices.
{"title":"Networked Power Management for Home Multimedia","authors":"Antti Virolainen, M. Saaranen","doi":"10.1109/CCNC08.2007.80","DOIUrl":"https://doi.org/10.1109/CCNC08.2007.80","url":null,"abstract":"The digitalization of home multimedia brings with it increased numbers of different kind of new devices. Although adding new user experiences, this will significantly increase energy consumption at home and globally. In this article we present one potential solution to enable more aggressive power management in networked home devices. This solution is based on UPnP Low power which allows devices in power save modes to be discovered and waken up. It is also shown based on implemented prototype that efficient power management system can be built on top of UPnP low power, particularly if home router manufacturers support the UPnP low power proxy service in their devices.","PeriodicalId":183858,"journal":{"name":"2008 5th IEEE Consumer Communications and Networking Conference","volume":"59 3 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":"117221219","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}
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