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A Distributed Multi-channel Cognitive MAC Protocol for IEEE 802.11s Wireless Mesh Networks 面向IEEE 802.11s无线Mesh网络的分布式多通道认知MAC协议
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562477
K. Ghaboosi, M. Latva-aho, Yang Xiao
{"title":"A Distributed Multi-channel Cognitive MAC Protocol for IEEE 802.11s Wireless Mesh Networks","authors":"K. Ghaboosi, M. Latva-aho, Yang Xiao","doi":"10.1109/CROWNCOM.2008.4562477","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562477","url":null,"abstract":"In this paper, we propose a novel distributed frequency agile medium access control (MAC) extension to the IEEE 802.11s amendment for the next generation wireless mesh networks (WMNs). The proposed scheme has complete backward compatibility with the legacy IEEE 802.11 and the emerging 802.11s while, it is perfectly capable of multi-channel deployment of available frequency opportunities in order to coordinate concurrent multiple data transmissions. The root concept of the proposed enhancement is mainly based on the deployment of well-known ISM frequency bands, where the existing 802.11-based wireless equipments nowadays operate, as the common control channel in order to establish concurrent data transmissions. Here, we apply the aforementioned key concept to the IEEE 802.11s common channel framework (CCF) to attain two important goals: on one hand, the proposed scheme improves the channel utilization and capacity using the concept of cognitive radio and on the other hand, using the same concept it leads to lower access delay due to smarter decision making procedures exploited for link layer connection establishment. Through extensive simulations, which also take into account primary user (PU) appearance in non-ISM frequency opportunities, performance of the proposed medium access control (MAC) enhancement is evaluated showing its remarkable efficiency and better wireless medium access management.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116103395","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: 35
A Set Cover-Based Density Control Algorithm for Sensing Coverage Problems in Wireless Sensor Networks 无线传感器网络感知覆盖问题的一种基于集合覆盖的密度控制算法
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562515
Saran Jenjaturong, C. Intanagonwiwat
{"title":"A Set Cover-Based Density Control Algorithm for Sensing Coverage Problems in Wireless Sensor Networks","authors":"Saran Jenjaturong, C. Intanagonwiwat","doi":"10.1109/CROWNCOM.2008.4562515","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562515","url":null,"abstract":"Wireless sensor networks consist of a large number of sensor nodes with limited power and resource. To prolong network lifetime, the energy consumption must be somehow reduced. In this paper, we propose a localized density control algorithm for energy savings. The goals are to maintain a minimal number of active sensor nodes and to reduce radio-traffic intensity while conserving the sensing coverage of the network. Our localized algorithm is based on a greedy solution of a weighted set-cover problem. Each node locally computes whether to sleep or to stay active. Given that the local decision might worsen the sensing coverage, we also introduce a voting scheme for selecting active nodes to assure that a node can sleep if and only if its sensing area is completely covered by its active neighbors. We have implemented our localized algorithm and voting scheme on Tiny OS and evaluated on TOSSIM. The result indicates that our algorithm is efficient and viable for practical use.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126923852","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 Nyquist Window for OFDM-based Cognitive Radio Systems 基于ofdm的认知无线电系统的新颖Nyquist窗口
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562495
Ziyuan Yang, Haixia Zhang, D. Yuan, Zhiquan Bai, K. Kwak
{"title":"A Novel Nyquist Window for OFDM-based Cognitive Radio Systems","authors":"Ziyuan Yang, Haixia Zhang, D. Yuan, Zhiquan Bai, K. Kwak","doi":"10.1109/CROWNCOM.2008.4562495","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562495","url":null,"abstract":"Cognitive radio (CR) is one of the important paradigms proposed by FCC for improving the spectrum utilization. To make agile spectrum resources allocation between the primary users (PUs) and the secondary users (SUs), Orthogonal Frequency Division Multiplexing (OFDM) has been taken as one of the potential modulation candidates in the physical layer in CR. This paper presents a mathematical model for measuring the interference in the windowed OFDM systems. Additionally, we introduce a novel optimized Nyquist window approach to decrease the out-of-band radiation, such that the interference to the adjacent non-orthogonal users can be avoided. Both theoretical analysis and numerical results show the performance enhancement of the proposed scheme.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125798522","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
Harmful Coexistence Between 802.15.4 and 802.11: A Measurement-based Study 802.15.4和802.11的有害共存:基于测量的研究
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562460
S. Pollin, Ian L. Tan, Bill Hodge, Carl Chun, A. Bahai
{"title":"Harmful Coexistence Between 802.15.4 and 802.11: A Measurement-based Study","authors":"S. Pollin, Ian L. Tan, Bill Hodge, Carl Chun, A. Bahai","doi":"10.1109/CROWNCOM.2008.4562460","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562460","url":null,"abstract":"Due to recent advances in wireless technology, a broad range of standards catering to a diverse set of users are currently emerging. Interoperability and coexistence between these heterogeneous networks are becoming key issues, and proper mitigation of these issues requires a good understanding of how and why heterogeneous networks may harm each other's p.erformance. In this paper, we focus on the coexistence of 802.11 (wireless LAN) and 802.15.4 (sensor networks) in the ISM band. These networks have very different transmission characteristics that result in asymmetric interaction patterns. Consequently, many studies assume that the impact of 802.15.4 on 802.11 is negligible. In this paper, we examine this assumption in detail and show that, in many cases, 802.15.4 significantly impacts 802.11 performance. Even when 802.15.4 is executing a listen-before-send, which should theoretically prevent interference, a significant 802.11 performance degradation frequently occurs due to disparate slot sizes between the two protocols. This is one of the first papers studying the listen-before-send performance for heterogeneous networks with substantial measured data. The results raise important coexistence issues for 802.15.4 and 802.11 in particular, but even more so for dynamic spectrum sharing between heterogeneous devices in general.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131183438","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: 160
Cognitive Radio Software Testbed using Dual Optimization in Genetic Algorithm 基于遗传算法对偶优化的认知无线电软件试验台
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562484
J. Kim, Sunghwan Sohn, Ning Han, Hantong Zheng, Young Min Kim, Joo-Kwan Lee
{"title":"Cognitive Radio Software Testbed using Dual Optimization in Genetic Algorithm","authors":"J. Kim, Sunghwan Sohn, Ning Han, Hantong Zheng, Young Min Kim, Joo-Kwan Lee","doi":"10.1109/CROWNCOM.2008.4562484","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562484","url":null,"abstract":"Cognitive Radio is considered as a potential solution to improve spectrum utilization via opportunistic spectrum sharing. In this paper, we present a software testbed which is developed to implement the cognitive radio system. The basic functions of cognitive radio are explored and implemented, including spectrum sensing and dynamic spectrum management. The testbed is able to verify the overall performance of cognitive radio technology. Furthermore, it provides an important system model to verify the effectiveness of the new algorithms in future study. The simulation on the testbed demonstrates that primary and secondary users can coexist. This is able to convince regulatory authorities as well as primary users to enable the implementation of cognitive radio technology.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132565787","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: 20
Primary user detection in OFDM based MIMO Cognitive Radio 基于OFDM的MIMO认知无线电主用户检测
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562561
V. Kuppusamy, R. Mahapatra
{"title":"Primary user detection in OFDM based MIMO Cognitive Radio","authors":"V. Kuppusamy, R. Mahapatra","doi":"10.1109/CROWNCOM.2008.4562561","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562561","url":null,"abstract":"In order to detect the presence of the primary user signal with high probability, spectrum sensing is a fundamental requirement to achieve the goal of cognitive radio (CR). This ensures efficient utilization of the spectrum. Energy detection is one of the technique to detect the primary users that are receiving data within the communication range of a CR user. In this work, detection performance of the primary user (PU) signal on CR receiver is investigated. In particularly, the OFDM based CR receiver detect the primary user OFDM signal, where CR receiver is equipped with multiple antennas based energy detector. We observe significant improvement in primary user detection with SLC based energy detection at the MIMO CRs in comparison to single antenna CRs.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"53-54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116145553","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: 48
A MAC Protocol that can Support Multimedia Traffic in Mesh and Ad-Hoc Networks 在网状和自组织网络中支持多媒体流量的MAC协议
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562492
C. P. Lokuge, A. Coulson
{"title":"A MAC Protocol that can Support Multimedia Traffic in Mesh and Ad-Hoc Networks","authors":"C. P. Lokuge, A. Coulson","doi":"10.1109/CROWNCOM.2008.4562492","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562492","url":null,"abstract":"This paper examines the end-to-end (source to destination) link performance characteristics when a novel media access control (MAC) protocol is used to support multimedia traffic in ad-hoc and mesh networks. The performance analysis was performed by a Monte Carlo simulator, the accuracy of which was verified by an analytical Markov model analysis. An overlaid cell structure was considered for the Monte Carlo simulation where the terminals can be mobile within this environment. The system model includes Rice fading, log-normal shadowing and distance dependent pathloss. The system model also considers preferential channel access based on the capture effect. The MAC protocol proposed in this study indicated satisfactory performance characteristics in the presence of multimedia traffic. The results further shows performance benefits of mesh networks over ad-hoc systems. The paper also shows how network density affects the network performance.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121280105","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
The Constraints Satisfied to Suppress the Interferences Caused by MB-OFDM UWB Based Cognitive Radio Systems; One Type of Low Density Parity Check(LDPC)-like Modulation Scheme 基于MB-OFDM的超宽带认知无线电系统抑制干扰的满足约束一种类似低密度奇偶校验(LDPC)的调制方案
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562473
Cheng Yang, Zheng Zhou, Y. Ye
{"title":"The Constraints Satisfied to Suppress the Interferences Caused by MB-OFDM UWB Based Cognitive Radio Systems; One Type of Low Density Parity Check(LDPC)-like Modulation Scheme","authors":"Cheng Yang, Zheng Zhou, Y. Ye","doi":"10.1109/CROWNCOM.2008.4562473","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562473","url":null,"abstract":"A mathematical expression of side-band interferences caused by sub-carriers of multi-band (MB)-OFDM UWB based cognitive radio is derived. Based on this expression, the constraint relationship among transmitted symbols, which is satisfied to suppress the interferences, is obtained. Combined with this constraint, the design process of a type of LDPC-like modulation scheme is described. With modulation schemes of this type, the bit rate error (BER) performance of MB-OFDM UWB based cognitive radio systems is improved, and simultaneously, the side-band signals decrease more quickly. As a result, by the only measure of tuning off the sub-carriers at the corresponding position a deeper spectral notch can be generated. The interferences to other protected services are suppressed sufficiently and finally the coexistence is achieved between MB-OFDM UWB based cognitive radio system and other narrow band radio systems.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"55 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124569427","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
Cognitive Decision Making Process Supervising the Radio Dynamic Reconfiguration 监督无线电动态重构的认知决策过程
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562503
N. Colson, A. Kountouris, A. Wautier, L. Husson
{"title":"Cognitive Decision Making Process Supervising the Radio Dynamic Reconfiguration","authors":"N. Colson, A. Kountouris, A. Wautier, L. Husson","doi":"10.1109/CROWNCOM.2008.4562503","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562503","url":null,"abstract":"Cognitive radio is a technological concept pushing for the introduction of intelligent radio operation going beyond system adaptation and reconfiguration on the basis of simple criteria and rules. Insofar, a rather limited amount of work has been published on the cognitive mechanisms that should be embedded into the communicating equipments to achieve such an intelligent behavior. Towards filling this gap, this paper presents an innovative optimization algorithm driving the decision making process supervising the cognitive radio reconfiguration. This cognitive algorithm, called RALFE for \"Reason And Learn From Experience\", presents interesting features since it allows to perform autonomous decision making with regard to multiple, possibly conflicting, operational objectives in the face of an uncertain environment. The proposed approach is illustrated for a case of cognitive waveform design.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128146427","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
Design and Verification of IEEE 802.22 WRAN Physical Layer IEEE 802.22 WRAN物理层的设计与验证
2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008) Pub Date : 2008-05-15 DOI: 10.1109/CROWNCOM.2008.4562542
Sunghyun Hwang, Jungsun Um, M. Song, Chang-Joo Kim, Hyung-Rae Park, Y. Kim
{"title":"Design and Verification of IEEE 802.22 WRAN Physical Layer","authors":"Sunghyun Hwang, Jungsun Um, M. Song, Chang-Joo Kim, Hyung-Rae Park, Y. Kim","doi":"10.1109/CROWNCOM.2008.4562542","DOIUrl":"https://doi.org/10.1109/CROWNCOM.2008.4562542","url":null,"abstract":"This paper describes the design and verification of IEEE 802.22 WRAN physical layer. The WRAN physical layer is fundamentally based on the IEEE 802.16e system, but the OFDMA parameters including preamble structure and pilot pattern are newly designed by considering the WRAN channel environments. In this paper, we present the simulation models and results by using appropriate synchronization and channel estimation algorithms. From the results of those simulations, we can obtain 90% preamble detection probability at SNR more than -5 dB, and we can synchronize the CPE to the BS within 2 % of sub-carrier spacing at SNR more than about 1 dB. Moreover, by using the LMMSE algorithm to estimate the channel, we can reduce the performance degradation of 0.2~0.5 dB compared to ideal channel estimation. In conclusion, we have found that the proposed receiver meets the functional requirement document (FRD) for WRAN physical layer.","PeriodicalId":409408,"journal":{"name":"2008 3rd International Conference on Cognitive Radio Oriented Wireless Networks and Communications (CrownCom 2008)","volume":"55 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130408219","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: 29
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