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2007 4th International Symposium on Wireless Communication Systems最新文献

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Security and AAA Architecture for WiFi-WiMAX Mesh Network WiFi-WiMAX网状网络的安全性和AAA架构
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392408
A. Samhat, Miloud Abdi
{"title":"Security and AAA Architecture for WiFi-WiMAX Mesh Network","authors":"A. Samhat, Miloud Abdi","doi":"10.1109/ISWCS.2007.4392408","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392408","url":null,"abstract":"This paper presents a flexible architecture for hybrid wireless network where WiFi and WiMAX in mesh mode are deployed in a complementary way. The end user can access to high bit rate Internet services directly by WiMAX technology through the 802.16 base stations or by WiFi technology through a CPE/AP connected to the 802.16 base station. We provide a brief description of the different functional entities and we investigate several technical issues including infrastructure and aspects related to the AAA (authentication, authorization, accounting) procedures for users as well as the system security.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132691110","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: 18
Rate 2/3 Trellis-Coded 8-ary Elliptical Phase Shift Keying Modulation 速率2/3栅格编码8进制椭圆相移键控调制
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392322
Yantao Qiao, Chunyi Song, S. Shimamoto
{"title":"Rate 2/3 Trellis-Coded 8-ary Elliptical Phase Shift Keying Modulation","authors":"Yantao Qiao, Chunyi Song, S. Shimamoto","doi":"10.1109/ISWCS.2007.4392322","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392322","url":null,"abstract":"In this paper, 8-ary Elliptical Phase Shift Keying (8EPSK) Trellis-Coded Modulation and set partitioning based on the sum of soft metric distance are proposed and developed. The criterion to design and search for good TCM codes is also presented. The performance of 8EPSK-TCM has been evaluated through Matlab simulation in terms of BER. The results show that the performance of 8EPSK-TCM outperforms the conventional 8PSK-TCM and 8EPSK convolutional codes.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133458001","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
A Novel Low-Complexity Dynamic Frequency Selection Algorithm for Cognitive Radios 一种新的认知无线电低复杂度动态频率选择算法
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392402
Sara Bahramian, B. Khalaj
{"title":"A Novel Low-Complexity Dynamic Frequency Selection Algorithm for Cognitive Radios","authors":"Sara Bahramian, B. Khalaj","doi":"10.1109/ISWCS.2007.4392402","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392402","url":null,"abstract":"In this paper, a non-cooperative distributed frequency selection algorithm is proposed for cognitive radio networks in which in addition to interference minimization, the minimization of implementation complexity and probability of interruption of secondary users are also addressed. The convergence and interference reduction property of the algorithm is also demonstrated using game theoretic concepts. In order to evaluate the performance of the algorithm, the associated optimization problem is formulated into a variant of graph colouring problem, and a centralized algorithm is also proposed as an approximation of the optimal solution. Finally, simulation results demonstrate that the proposed distributed algorithm achieves acceptable performance in comparison with earlier schemes.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133526624","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
Error Rate Estimation for DS-IR and DS-UWB over Frequency Selective Channels 选频信道上DS-IR和DS-UWB的误码率估计
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392397
L. Piazzo, F. Nuzzolo
{"title":"Error Rate Estimation for DS-IR and DS-UWB over Frequency Selective Channels","authors":"L. Piazzo, F. Nuzzolo","doi":"10.1109/ISWCS.2007.4392397","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392397","url":null,"abstract":"We consider a single user direct sequence impulse radio (DS-IR) system operating with a QPSK constellation over a deterministic, frequency selective channel and affected by additive white Gaussian noise (AWGN). We present a method to obtain a fast and accurate estimation of the symbol error rate (SER) when the receiver is a correlation receiver with perfect synchronization and channel knowledge. The method is based on the estimation of the Inter Symbol Interference (ISI) distribution by means of the characteristic function (CF) approach. The results also apply to direct sequence ultra wideband (DS-UWB) modulation since it is a special case of DS-IR. The accuracy of the method is verified by comparing the SER prediction with that obtained by means of Monte Carlo (MC) simulation.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132000198","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
Evaluation of Perceived QoS with Multimedia Applications in a Heterogeneous Wireless Network 异构无线网络中多媒体应用感知QoS的评价
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392310
N. Vucevic, F. Bernardo, A. Umbert, L. Budzisz
{"title":"Evaluation of Perceived QoS with Multimedia Applications in a Heterogeneous Wireless Network","authors":"N. Vucevic, F. Bernardo, A. Umbert, L. Budzisz","doi":"10.1109/ISWCS.2007.4392310","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392310","url":null,"abstract":"This paper presents a study addressed to evaluate the variation in perceived QoS experienced by a user running multimedia applications in a heterogeneous wireless network. To perform this evaluation, a real-time testbed emulating an all-IP B3G network that includes UMTS Terrestrial Radio Access Network (UTRAN), GSM/EDGE Radio Access Network (GERAN), and Wireless Local Area Network (WLAN); and the corresponding common core network (CN) based on DiffServ technology and Multiprotocol Label Switching (MPLS) has been used. Results for videostreaming and video conference applications when running under interruptions due to a vertical handover (VHO) are included in this paper, pointing out the variations in behaviour of different applications.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133393907","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
Relay Strategies for High Rate Space-Time Code in Cooperative MIMO Networks 协同MIMO网络中高速率空时码的中继策略
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392430
M. Arti, R. Bose, M. Bhatnagar, A. Hjørungnes
{"title":"Relay Strategies for High Rate Space-Time Code in Cooperative MIMO Networks","authors":"M. Arti, R. Bose, M. Bhatnagar, A. Hjørungnes","doi":"10.1109/ISWCS.2007.4392430","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392430","url":null,"abstract":"In this paper, we combine the idea of high rate space-time codes with the cooperative MIMO wireless networks to reduce the overall delay incurred in relaying signals to more than one receiver. The relay structure is optimized in order to achieve maximum SNR at the receiver nodes. This combination provides a significant reduction in the delay required for the relaying and transmission of the signals to the multiple receivers with a minute loss in performance. We have also shown that this loss in the performance could be recovered by selecting more number of relays. We propose three different relaying strategies for high rate space-time codes, which are very useful in providing faster handoffs for wireless networks.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133835404","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
Scheduling Algorithms for Increased Throughput Guarantees in Wireless Networks 无线网络中提高吞吐量保证的调度算法
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392370
V. Hassel, S. D. L. K. D. Ryhove, G. Øien
{"title":"Scheduling Algorithms for Increased Throughput Guarantees in Wireless Networks","authors":"V. Hassel, S. D. L. K. D. Ryhove, G. Øien","doi":"10.1109/ISWCS.2007.4392370","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392370","url":null,"abstract":"For cellular wireless networks carrying real-time traffic, it is in the interest of both network operators and customers that throughput guarantees can be offered. In this paper, we formulate an optimization problem which aims at maximizing the throughput that can be guaranteed to the mobile users. By building on results obtained by Borst and Whiting and by assuming that the distributions of the users' carrier-to-noise ratios are known, we find the solution to this problem for users with different channel quality distributions, both for the scenario where all the users have the same throughput guarantee, and for the scenario where all the users have different throughput guarantees. Based on these solutions, we propose an adaptive scheduling algorithm that performs significantly better than other well-known scheduling algorithms.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123183266","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
User QoS-based Multi-Channel Assignment Schemes under Multimedia Traffic Conditions 多媒体业务条件下基于用户qos的多信道分配方案
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392312
J. Gozálvez, M. C. Lucas-Estañ, J. Sánchez-Soriano
{"title":"User QoS-based Multi-Channel Assignment Schemes under Multimedia Traffic Conditions","authors":"J. Gozálvez, M. C. Lucas-Estañ, J. Sánchez-Soriano","doi":"10.1109/ISWCS.2007.4392312","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392312","url":null,"abstract":"The implementation of multi-channel assignment policies can improve a mobile's network performance by increasing the user throughput and reducing transmission delays. However, to define efficient distribution policies, the varying service demands and the search for user QoS fairness should be considered under multimedia traffic scenarios. In this context, this paper proposes and evaluates novel bankruptcy and utility-based multi-channel distribution schemes aimed at maximising the resource's efficiency and guaranteeing user QoS fairness.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"148 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122768978","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: 18
On CBM-ICC Service Provision in UCWW UCWW中CBM-ICC服务提供研究
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392315
Ivan Ganchev, M. O'Droma, Ning Wang
{"title":"On CBM-ICC Service Provision in UCWW","authors":"Ivan Ganchev, M. O'Droma, Ning Wang","doi":"10.1109/ISWCS.2007.4392315","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392315","url":null,"abstract":"This paper proposes a consumer-oriented Incoming Call Connection (ICC) service established on the newly proposed Consumer-Based techno-business Model (CBM). The proposed CBM-ICC service is viewed as an integral element of the technical foundation for the future Ubiquitous Consumer Wireless World (UCWW). The CBM-ICC service will offer more flexibility and intelligence for the management of incoming calls in UCWW with regard to different users' personal requirements. This service will allow users to receive incoming calls via multiple access networks/providers, and thereby be Always Best Connected and Served (ABC&S). A CBM-ICC service architecture is described along with a classification of the main generic service scenarios. Signaling for one specific scenario is theoretically elaborated and experimentally tested. Some measurement results are given.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126447939","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
Performance Evaluation of IEEE 802.16 WiMAX Link With Respect to Higher Layer Protocols 基于高层协议的IEEE 802.16 WiMAX链路性能评估
2007 4th International Symposium on Wireless Communication Systems Pub Date : 2007-12-04 DOI: 10.1109/ISWCS.2007.4392326
F. Z. Yousaf, K. Daniel, C. Wietfeld
{"title":"Performance Evaluation of IEEE 802.16 WiMAX Link With Respect to Higher Layer Protocols","authors":"F. Z. Yousaf, K. Daniel, C. Wietfeld","doi":"10.1109/ISWCS.2007.4392326","DOIUrl":"https://doi.org/10.1109/ISWCS.2007.4392326","url":null,"abstract":"The WiMAX technology based on the IEEE802.16-d standard is a broadband wireless access (BWA) technology and considered to be an important ingredient of the composition of the next generation networks (NGN). Till date, due to lack of deployment, not enough data is available in terms of its operational capabilities and efficiencies. The main objective of this paper is to evaluate, analyze and compare the performance of a WiMAX link under different load and traffic conditions. For this purpose an experimental WiMAX test-bed has been deployed at the Communication Network Institute (CNI), University Dortmund and several experiments and stress tests are carried out over this CNI WiMAX test-bed in the uplink and downlink directions for various service and traffic types and at various distances from the base station. The results of these experiments are presented in this paper.","PeriodicalId":261480,"journal":{"name":"2007 4th International Symposium on Wireless Communication Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130596590","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: 36
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