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Cooperative sensor solution to enhancing the performance of spectrum sensing 协同传感器解决方案，提高频谱感知性能
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.42
H. Zhuang, Zezhou Luo, Jietao Zhang, Yun Li
{"title":"Cooperative sensor solution to enhancing the performance of spectrum sensing","authors":"H. Zhuang, Zezhou Luo, Jietao Zhang, Yun Li","doi":"10.4108/CHINACOM.2010.42","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.42","url":null,"abstract":"Cognitive radio (CR) is a promising technology for future wireless networks. In order to reduce the interference to primary system, CR users have to detect the spectra with low overhead and reliably in sensing slots, which has to occupy part of the available resources. In this paper, we propose a novel spectrum sensing solution that is based on cooperative wireless sensors to detect and collect available channels information and then establish a regional database managing regional spectrum information. We classify wireless sensors into relay wireless sensors (RWSs) and ordinary wireless sensors (OWSs), considering the diversity of multi-sensors and Cooperative Amplify-and-Forward (CAF) spectrum detection and CRC-based Decode-and-Forward (CDF) cooperative result reporting. Soften hard combination mechanism is proposed to further enhance the performance of spectrum sensing with one-bit overhead. If observed signals in OWSs fall in uncertain energy region, OWSs relay the signals to RWSs by CAF, otherwise, OWSs report the detection results to RWSs and then RWSs relay to Cognitive Radio Bastion (CR-BS) by CDF. Simulations show that spectrum sensing performance is improved by means of the two-layer sensing mechanism.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129568352","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
CRAT: A novel routing algorithm for wireless sensor networks based on cooperative MIMO CRAT:一种基于协同MIMO的无线传感器网络路由算法
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.128
Pingyuan Liang, Xingcheng Liu
{"title":"CRAT: A novel routing algorithm for wireless sensor networks based on cooperative MIMO","authors":"Pingyuan Liang, Xingcheng Liu","doi":"10.4108/CHINACOM.2010.128","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.128","url":null,"abstract":"Cooperative MIMO technology can be used to reduce the total energy consumption compared with traditional SISO technology under condition that the transmission distances surpass a threshold in wireless sensor networks. In order to solve the routing optimization problem of multi-hop extensible wireless sensor networks based on cooperative MIMO, a novel cost-based routing algorithm with thresholds (CRAT) is proposed. In the algorithm, the routing paths stretch out unboundedly from monitor node and reach the base station ultimately fixed on thresholds, and the routing structure of the CRAT algorithm is different from other cost-based routing algorithms. The energy consumption and thresholds of the algorithm have been analyzed. After that, we define the cost function of CRAT algorithm according to relevant parameters including energy consumption, residual energy, hops and antennas. Finally, the experiments verify the effectiveness of the CRAT algorithm in saving energy, and the reasonableness of the cost function.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130573520","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
A noncooperative game-theoretic vertical handoff in 4G heterogeneous wireless networks 4G异构无线网络中的非合作博弈论垂直切换
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.32
Qianbin Chen, Wei-Guang Zhou, Rong Chai, Lun Tang, Ya-Lai Zhao
{"title":"A noncooperative game-theoretic vertical handoff in 4G heterogeneous wireless networks","authors":"Qianbin Chen, Wei-Guang Zhou, Rong Chai, Lun Tang, Ya-Lai Zhao","doi":"10.4108/CHINACOM.2010.32","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.32","url":null,"abstract":"Proactive handoff is expected to be one of the distinct feature of 4G heterogeneous wireless systems, which is obviously different from the passive handoff commonly existed in traditional cellular systems. Users with multi-network interface terminals can actively and easily handoff to access network for better QoS satisfaction at a minimum expense, on the other hand, service providers (SPs) will have to face more intense competition for attracting more users to maximize their profits. In this paper, the relationship between competitive SPs and users is modeled as a noncooperative game, and the Nash equilibrium solutions corresponding to the best response price offered by SP are obtained. Based on the optimal prices, a novel vertical handoff algorithm for maximizing user performance-price-ratio is proposed. Numerical results demonstrate that all SPs can attain maximal profits from the Nash equilibrium results, and both of the network utilization efficiency and user QoS can be guaranteed.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126410000","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: 7
Combined turbo coding and non-coherent space-time modulation in rapid Rayleigh fading channels 快速瑞利衰落信道中turbo编码与非相干空时调制的组合
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.76
Xuefeng Ding, Dapeng Zhang
{"title":"Combined turbo coding and non-coherent space-time modulation in rapid Rayleigh fading channels","authors":"Xuefeng Ding, Dapeng Zhang","doi":"10.4108/CHINACOM.2010.76","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.76","url":null,"abstract":"Unitary space-time modulation (USTM) can perform well without channel state information (CSI) in fast fading channels when signal-to-noise ratio (SNR) is large enough. However, it loses its advantages at low SNR or the channel coherence interval is T = 1. In this condition, the information should be carried by multilevel structured constellations with a single transmit antenna. Even though, the bit error rate (BER) of this kind of signalling scheme is still too high to accept. In this paper, we propose a simple non-coherent space-time modulation scheme, combine it with turbo coding, and derive the corresponding decoding algorithm. Simulation results show that it can greatly improve the system performance. With multiple receive antennas, the BER can be further decreased.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121161143","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
Alternative path-based congestion control in many-to-one sensor networks 多对一传感器网络中基于备选路径的拥塞控制
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/IWIOT.2010.2
Kun Zhao, Weidong Liu, Ming Sze Angela Wong, Jiaxing Song
{"title":"Alternative path-based congestion control in many-to-one sensor networks","authors":"Kun Zhao, Weidong Liu, Ming Sze Angela Wong, Jiaxing Song","doi":"10.4108/IWIOT.2010.2","DOIUrl":"https://doi.org/10.4108/IWIOT.2010.2","url":null,"abstract":"Compared with traditional wireless networks, the congestion control design of Wireless Sensor Networks (WSN) is more significant to the network performance due to its own characteristics. In this paper, we design a mechanism using spare resources to mitigate congestion in a many to one network. We classify the node congestion into two categories according to the reasons and propose two distributed algorithms which can find an alternative path using the neighbor table efficiently. At the end of this paper, we simulate the drop rate of WSN to evaluate our mechanism. The simulation shows that using our mechanism improves network transmission quality significantly.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121719641","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
Fast reservation list-to-send MAC protocol in wireless networks 无线网络中快速预约列表发送MAC协议
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.10
Yayan Li, Kai Liu
{"title":"Fast reservation list-to-send MAC protocol in wireless networks","authors":"Yayan Li, Kai Liu","doi":"10.4108/CHINACOM.2010.10","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.10","url":null,"abstract":"Fast reservation list-to-send (FRLS) medium access control (MAC) protocol is proposed to apply to wireless networks with long propagation delay. In the protocol, a central control node (CCN) is applied to allocate the channel resources of two channels, and all the nodes transmit packets over the two channels without collision. Packet train transmission mechanism ensures that a number of packets are transmitted continuously with small guard interval and just a one-way propagation delay. Once a node successfully reserves the channel resources for a communication session, it can transmit the whole message without the need of any other reservations, which gain high utilization of the channels. Moreover, CCN can provide uniform time benchmark to make the network working in an asynchronous fashion. Simulation results show that FRLS protocol outperforms centralized scheduling-based MAC (CSMAC) protocol in terms of throughput, average packet access delay and average packet dropping rate, and effectively resolves low channel utilization problem due to long propagation delay.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114056300","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
Adaptive joint multi-cell reception with uplink power control and beamforming 具有上行功率控制和波束形成的自适应联合多小区接收
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.123
W. Li, M. Juntti, Xiaojia Lu, A. Tolli, E. Kunnari, O. Piirainen
{"title":"Adaptive joint multi-cell reception with uplink power control and beamforming","authors":"W. Li, M. Juntti, Xiaojia Lu, A. Tolli, E. Kunnari, O. Piirainen","doi":"10.4108/CHINACOM.2010.123","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.123","url":null,"abstract":"Assuming that multiple base stations (BSs) are coordinated for the joint reception of each user's transmitted signal in the uplink, we study the sum power minimization (SP-MIN) problem for the cellular systems. As BSs may have multiple antennas, power control and receive beamforming are jointly optimized with the adaptive multi BS set (MBS) selection for each user. By doing optimization iteratively, an algorithm is proposed to find the minimum transmit power. Although the SP-Min problem is non-convex in general, it is proven that the proposed algorithm using the optimal MBS selection can converge to the optimal solution as long as it is feasible. To improve the computational efficiency of the algorithm, two simplified MBS selection schemes have been presented as well as the optimal scheme. Using the proposed algorithm with either the optimal or the simplified MBS selection schemes, a significant power efficiency improvement is obtained which is verified by the system level simulations.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"86 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131593150","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
Dynamic load balancing in 3GPP LTE multi-cell networks with heterogenous services 具有异构业务的3GPP LTE多蜂窝网络的动态负载平衡
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.141
Hao Wang, Lianghui Ding, Ping Wu, Zhiwen Pan, Nan Liu, X. You
{"title":"Dynamic load balancing in 3GPP LTE multi-cell networks with heterogenous services","authors":"Hao Wang, Lianghui Ding, Ping Wu, Zhiwen Pan, Nan Liu, X. You","doi":"10.4108/CHINACOM.2010.141","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.141","url":null,"abstract":"Load balancing among multi-cells in 3GPP Long Term Evolution (LTE) networks with heterogeneous services is investigated. It is formulated as a multi-objective optimization problem, the objectives of which are load balancing index of services with QoS requirements and network utility of other services. The constraints are physical resource limits and QoS demands. Then the property and complexity of the problem are analyzed, and sequential optimization method is employed to solve it. After that, a practical algorithm for load balancing is developed which includes QoS-guaranteed hybrid scheduling, handover of users with and without QoS requirements, and call admission control. Simulation is made extensively and the results show that the proposed load balancing algorithm can significantly enhance the performance of LTE networks with heterogeneous services, decreasing call block probability of users with QoS requirements, and increasing throughput of boundary users with only a bit degradation of total throughput.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127757777","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: 32
Heterogeneous multi-layer access and RRM for the internet of things 面向物联网的异构多层接入和RRM
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/IWIOT.2010.4
Shen Jia, X. Lu, L. Huafei, Xu Fei
{"title":"Heterogeneous multi-layer access and RRM for the internet of things","authors":"Shen Jia, X. Lu, L. Huafei, Xu Fei","doi":"10.4108/IWIOT.2010.4","DOIUrl":"https://doi.org/10.4108/IWIOT.2010.4","url":null,"abstract":"This paper first introduces a heterogeneous IoT access network architecture for the Internet of Things (IoT). In the network, an IoT terminal can adaptively access to a wireless sensor network (WSN) gateway or a cellular base station (BS) according to the channel conditions. The heterogeneous IoT access network schedules the IoT terminal to access to either the WSN or the cellular network (CN) via a joint scheduling RRM algorithm. The simulations show that the heterogeneous IoT system provides a capacity gain over the simple combination of WSN and CN.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"104 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134355706","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
Throughput maximization for opportunistic spectrum access via transmission probability scheduling scheme 基于传输概率调度的机会频谱接入吞吐量最大化
2010 5th International ICST Conference on Communications and Networking in China Pub Date : 2010-08-01 DOI: 10.4108/CHINACOM.2010.15
Yang Cao, Daiming Qu, Guohui Zhong, Tao Jiang
{"title":"Throughput maximization for opportunistic spectrum access via transmission probability scheduling scheme","authors":"Yang Cao, Daiming Qu, Guohui Zhong, Tao Jiang","doi":"10.4108/CHINACOM.2010.15","DOIUrl":"https://doi.org/10.4108/CHINACOM.2010.15","url":null,"abstract":"In this paper, we propose a novel transmission probability scheduling scheme for opportunistic spectrum access in cognitive radio networks. With the proposed scheme, the secondary user's throughput over a single channel is maximized while collision probability perceived by the primary user is constrained under a required threshold since the secondary user optimally schedules its transmission probabilities during the primary user's idle period. Moreover, we deeply study the maximum achievable throughput of the secondary user when the idle period of the primary user is different distribution to analyze the performance of the proposed transmission probability scheduling scheme. In a practical communication systems, where primary user's traffic pattern and parameters are unknown and the secondary user's spectrum sensing is imperfect, a novel predictor, which is based on hidden Markov model, is also proposed to predict the future channel states and to enable the transmission probability scheduling for the secondary user. Conducted simulations show that the proposed transmission probability scheduling scheme and predictor are effective and can offer good system performances.","PeriodicalId":422191,"journal":{"name":"2010 5th International ICST Conference on Communications and Networking in China","volume":"105 1-3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114026450","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
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