Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.42
H. Zhuang, Zezhou Luo, Jietao Zhang, Yun Li
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.
认知无线电(CR)是未来无线网络发展的重要技术之一。为了减少对主系统的干扰，CR用户必须在传感槽中进行低开销、可靠的光谱检测，这就占用了部分可用资源。在本文中，我们提出了一种新的频谱感知解决方案，该方案基于协同无线传感器检测和收集可用信道信息，然后建立一个区域数据库来管理区域频谱信息。考虑到多传感器的多样性、协同放大转发(CAF)频谱检测和基于crc的解码转发(CDF)协同结果报告，将无线传感器分为中继无线传感器(RWSs)和普通无线传感器(OWSs)。为了进一步提高单比特开销的频谱感知性能，提出了软硬组合机制。如果OWSs中观测到的信号处于不确定能量区，OWSs通过CAF将信号转发给RWSs，否则OWSs将检测结果报告给RWSs, RWSs再通过CDF将信号转发给认知无线电堡垒(Cognitive Radio Bastion, CR-BS)。仿真结果表明，采用双层感知机制可以提高频谱感知性能。
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.128
Pingyuan Liang, Xingcheng Liu
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.
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.32
Qianbin Chen, Wei-Guang Zhou, Rong Chai, Lun Tang, Ya-Lai Zhao
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.
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.76
Xuefeng Ding, Dapeng Zhang
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.
{"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}
Kun Zhao, Weidong Liu, Ming Sze Angela Wong, Jiaxing Song
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.
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.10
Yayan Li, Kai Liu
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.
提出了一种适用于传输延迟较大的无线网络的快速保留列表发送(FRLS)介质访问控制(MAC)协议。该协议采用中央控制节点CCN (central control node)来分配两个通道的信道资源，所有节点在两个通道上传输数据包，互不冲突。包列传输机制保证了多个包以较小的保护间隔连续传输，并且只有单向传播延迟。一旦节点成功地为通信会话保留了信道资源，它就可以在不需要任何其他保留的情况下传输整个消息，从而获得了较高的信道利用率。此外，CCN可以提供统一的时间基准，使网络以异步方式工作。仿真结果表明，FRLS协议在吞吐量、平均分组访问延迟和平均分组丢包率等方面都优于集中式调度MAC (CSMAC)协议，有效解决了由于传播延迟长导致的信道利用率低的问题。
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.123
W. Li, M. Juntti, Xiaojia Lu, A. Tolli, E. Kunnari, O. Piirainen
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.
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.141
Hao Wang, Lianghui Ding, Ping Wu, Zhiwen Pan, Nan Liu, X. You
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.
{"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}
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.
{"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}
Pub Date : 2010-08-01DOI: 10.4108/CHINACOM.2010.15
Yang Cao, Daiming Qu, Guohui Zhong, Tao Jiang
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.
{"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}
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