The Experts below are selected from a list of 12555 Experts worldwide ranked by ideXlab platform
Chunsheng Xin - One of the best experts on this subject based on the ideXlab platform.
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Efficient Virtual Backbone Construction without a Common Control Channel in Cognitive Radio Networks
IEEE Transactions on Parallel and Distributed Systems, 2014Co-Authors: Ying Dai, Chunsheng XinAbstract:Virtual backbones have brought about many benefits for routing and data transmission in traditional wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role, and would increase the efficiency of routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks due to opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We analyze the capacity between an active node and a passive node in a single area. Our approach is testified through evaluation of the cost, and also through comparison with other models.
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virtual backbone construction for cognitive radio networks without Common Control Channel
International Conference on Computer Communications, 2013Co-Authors: Ying Dai, Chunsheng XinAbstract:The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks because of the opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We evaluate our approach through extensive simulations.
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INFOCOM - Virtual backbone construction for cognitive radio networks without Common Control Channel
2013 Proceedings IEEE INFOCOM, 2013Co-Authors: Ying Dai, Chunsheng XinAbstract:The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks because of the opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We evaluate our approach through extensive simulations.
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GLOBECOM - An Approximately Optimal Rendezvous Scheme for Dynamic Spectrum Access Networks
2011 IEEE Global Telecommunications Conference - GLOBECOM 2011, 2011Co-Authors: Chunsheng Xin, Min Song, Chien-chung ShenAbstract:In this paper, we present a rendezvous scheme for dynamic spectrum access (DSA) networks that can achieve approximately optimal throughput while not relying on a Common Control Channel. Compared with existing rendezvous schemes for DSA networks that use a Common Control Channel, the proposed scheme avoids congestion and jamming of the Control Channel, and also reduces Control complexity and overhead in DSA. We prove that the proposed rendezvous scheme achieves approximately optimal throughput, and analyze the convergence time of this scheme to obtain the approximately optimal throughput.
Jiang Xie - One of the best experts on this subject based on the ideXlab platform.
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prospect a proactive spectrum handoff framework for cognitive radio ad hoc networks without Common Control Channel
IEEE Transactions on Mobile Computing, 2012Co-Authors: Yi Song, Jiang XieAbstract:Cognitive Radio (CR) technology is a promising solution to enhance the spectrum utilization by enabling unlicensed users to exploit the spectrum in an opportunistic manner. Since unlicensed users are temporary visitors to the licensed spectrum, they are required to vacate the spectrum when a licensed user reclaims it. Due to the randomness of the appearance of licensed users, disruptions to both licensed and unlicensed communications are often difficult to prevent, which may lead to low throughput of both licensed and unlicensed communications. In this paper, a proactive spectrum handoff framework for CR ad hoc networks, ProSpect, is proposed to address these concerns. In the proposed framework, Channel-Switching (CW) policies and a proactive spectrum handoff protocol are proposed to let unlicensed users vacate a Channel before a licensed user utilizes it to avoid unwanted interference. Network coordination schemes for unlicensed users are also incorporated into the spectrum handoff protocol design. Moreover, a distributed Channel selection scheme to eliminate collisions among unlicensed users in a multiuser spectrum handoff scenario is proposed. In our proposed framework, unlicensed users coordinate with each other without using a Common Control Channel (CCC), which is highly adaptable in a spectrum-varying environment. We compare our proposed proactive spectrum handoff protocol with a reactive spectrum handoff protocol, under which unlicensed users switch Channels after collisions with licensed transmissions occur. Simulation results show that our proactive spectrum handoff outperforms the reactive spectrum handoff approach in terms of higher throughput and fewer collisions to licensed users. Furthermore, our distributed Channel selection can achieve higher packet delivery rate in a multiuser spectrum handoff scenario, compared with existing Channel selection schemes.
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INFOCOM - A distributed broadcast protocol in multi-hop cognitive radio ad hoc networks without a Common Control Channel
2012 Proceedings IEEE INFOCOM, 2012Co-Authors: Yi Song, Jiang XieAbstract:Broadcast is an important operation in wireless ad hoc networks where Control information is usually propagated as broadcasts for the realization of most networking protocols. In traditional ad hoc networks, since the spectrum availability is uniform, broadcasts are delivered via a Common Channel which can be heard by all users in a network. However, in cognitive radio (CR) ad hoc networks, different unlicensed users may acquire different available Channel sets. This non-uniform spectrum availability imposes special design challenges for broadcasting in CR ad hoc networks. In this paper, a fully-distributed broadcast protocol in multi-hop CR ad hoc networks without a Common Control Channel is proposed. In our design, we consider practical scenarios that each unlicensed user is not assumed to be aware of the global network topology, the spectrum availability information of other users, and time synchronization information. By intelligently downsizing the original available Channel set and designing the broadcasting sequences and scheduling schemes, our proposed broadcast protocol can provide very high successful broadcast ratio while achieving the shortest average broadcast delay. It can also eliminate broadcast collisions. To the best of our knowledge, this is the first work that addresses the broadcasting challenges specifically in multi-hop CR ad hoc networks under practical scenarios.
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On the Spectrum Handoff for Cognitive Radio Ad Hoc Networks Without Common Control Channel
Cognitive Radio Mobile Ad Hoc Networks, 2011Co-Authors: Yi Song, Jiang XieAbstract:Cognitive radio (CR) technology is a promising solution to enhance the spectrum utilization by enabling unlicensed users to exploit the spectrum in an opportunistic manner. Since unlicensed users are considered as temporary visitors to the licensed spectrum, they are required to vacate the spectrum when a licensed user reclaims it. Due to the randomness of the appearance of licensed users, disruptions to both licensed and unlicensed communications are often difficult to prevent, which may lead to low throughput of both licensed and unlicensed communications. In this chapter, a proactive spectrum handoff framework for CR ad hoc networks is proposed to address these concerns. In the proposed framework, Channel switching policies and a proactive spectrum handoff protocol are proposed to let unlicensed users vacate a Channel before a licensed user utilizes it to avoid unwanted interference. Network coordination schemes for unlicensed users are also incorporated into the spectrum handoff protocol design to realize Channel rendezvous. Moreover, a distributed Channel selection scheme to eliminate collisions among unlicensed users in a multi-user spectrum handoff scenario is proposed. In our proposed framework, unlicensed users coordinate with each other without using a Common Control Channel, which is highly adaptable in a spectrum-varying environment. We compare our proposed proactive spectrum handoff protocol with a reactive spectrum handoff protocol, under which unlicensed users switch Channels after collisions with licensed transmissions occur under different Channel coordination schemes. Simulation results show that our proactive spectrum handoff outperforms the reactive spectrum handoff approach in terms of higher throughput and fewer collisions to licensed users. Furthermore, our distributed Channel selection can achieve substantially higher packet delivery rate in a multi-user spectrum handoff scenario, compared with existing Channel selection schemes. In addition, we propose a novel three-dimensional discrete-time Markov chain to characterize the process of reactive spectrum handoffs and analyze the performance of unlicensed users. We validate the numerical results obtained from our proposed Markov model against simulation and investigate other parameters of interest in the spectrum handoff scenario. Our proposed analytical model can be applied to various practical network scenarios.
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Performance Analysis of Spectrum Handoff for Cognitive Radio Ad Hoc Networks without Common Control Channel under Homogeneous Primary Traffic
arXiv: Information Theory, 2011Co-Authors: Yi Song, Jiang XieAbstract:Cognitive radio (CR) technology is regarded as a promising solution to the spectrum scarcity problem. Due to the spectrum varying nature of CR networks, unlicensed users are required to perform spectrum handoffs when licensed users reuse the spectrum. In this paper, we study the performance of the spectrum handoff process in a CR ad hoc network under homogeneous primary traffic. We propose a novel three dimensional discrete-time Markov chain to characterize the process of spectrum handoffs and analyze the performance of unlicensed users. Since in real CR networks, a dedicated Common Control Channel is not practical, in our model, we implement a network coordination scheme where no dedicated Common Control Channel is needed. Moreover, in wireless communications, collisions among simultaneous transmissions cannot be immediately detected and the whole collided packets need to be retransmitted, which greatly affects the network performance. With this observation, we also consider the retransmissions of the collided packets in our proposed discrete-time Markov chain. In addition, besides the random Channel selection scheme, we study the impact of different Channel selection schemes on the performance of the spectrum handoff process. Furthermore, we also consider the spectrum sensing delay in our proposed Markov model and investigate its effect on the network performance. We validate the numerical results obtained from our proposed Markov model against simulation and investigate other parameters of interest in the spectrum handoff scenario. Our proposed analytical model can be applied to various practical network scenarios. It also provides new insights on the process of spectrum handoffs. Currently, no existing analysis has considered the comprehensive aspects of spectrum handoff as what we consider in this paper.
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INFOCOM - Performance analysis of spectrum handoff for cognitive radio ad hoc networks without Common Control Channel under homogeneous primary traffic
2011 Proceedings IEEE INFOCOM, 2011Co-Authors: Yi Song, Jiang XieAbstract:Cognitive radio (CR) technology is regarded as a promising solution to the spectrum scarcity problem. Due to the spectrum varying nature of CR networks, unlicensed users are required to perform spectrum handoffs when licensed users reuse the spectrum. In this paper, we study the performance of the spectrum handoff process in a CR ad hoc network under homogeneous primary traffic. We propose a novel three dimensional discrete-time Markov chain to characterize the process of spectrum handoffs and analyze the performance of unlicensed users. Since in real CR networks, a dedicated Common Control Channel is not practical, in our model, we implement a network coordination scheme where no dedicated Common Control Channel is needed. Moreover, in wireless communications, collisions among simultaneous transmissions cannot be immediately detected and the whole collided packets need to be retransmitted, which greatly affects the network performance. With this observation, we also consider the retransmissions of the collided packets in our proposed discrete-time Markov chain. In addition, besides the random Channel selection scheme, we study the impact of different Channel selection schemes on the performance of the spectrum handoff process. Furthermore, we also consider the spectrum sensing delay in our proposed Markov model and investigate its effect on the network performance. We validate the numerical results obtained from our proposed Markov model against simulation and investigate other parameters of interest in the spectrum handoff scenario. Our proposed analytical model can be applied to various practical network scenarios. It also provides new insights on the process of spectrum handoffs. Currently, no existing analysis has considered the comprehensive aspects of spectrum handoff as what we consider in this paper.
Yi Song - One of the best experts on this subject based on the ideXlab platform.
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prospect a proactive spectrum handoff framework for cognitive radio ad hoc networks without Common Control Channel
IEEE Transactions on Mobile Computing, 2012Co-Authors: Yi Song, Jiang XieAbstract:Cognitive Radio (CR) technology is a promising solution to enhance the spectrum utilization by enabling unlicensed users to exploit the spectrum in an opportunistic manner. Since unlicensed users are temporary visitors to the licensed spectrum, they are required to vacate the spectrum when a licensed user reclaims it. Due to the randomness of the appearance of licensed users, disruptions to both licensed and unlicensed communications are often difficult to prevent, which may lead to low throughput of both licensed and unlicensed communications. In this paper, a proactive spectrum handoff framework for CR ad hoc networks, ProSpect, is proposed to address these concerns. In the proposed framework, Channel-Switching (CW) policies and a proactive spectrum handoff protocol are proposed to let unlicensed users vacate a Channel before a licensed user utilizes it to avoid unwanted interference. Network coordination schemes for unlicensed users are also incorporated into the spectrum handoff protocol design. Moreover, a distributed Channel selection scheme to eliminate collisions among unlicensed users in a multiuser spectrum handoff scenario is proposed. In our proposed framework, unlicensed users coordinate with each other without using a Common Control Channel (CCC), which is highly adaptable in a spectrum-varying environment. We compare our proposed proactive spectrum handoff protocol with a reactive spectrum handoff protocol, under which unlicensed users switch Channels after collisions with licensed transmissions occur. Simulation results show that our proactive spectrum handoff outperforms the reactive spectrum handoff approach in terms of higher throughput and fewer collisions to licensed users. Furthermore, our distributed Channel selection can achieve higher packet delivery rate in a multiuser spectrum handoff scenario, compared with existing Channel selection schemes.
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A distributed broadcast protocol in multi-hop cognitive radio ad hoc networks without a Common Control Channel
2012 Proceedings IEEE INFOCOM, 2012Co-Authors: Yi SongAbstract:Broadcast is an important operation in wireless ad hoc networks where Control information is usually propagated as broadcasts for the realization of most networking protocols. In traditional ad hoc networks, since the spectrum availability is uniform, broadcasts are delivered via a Common Channel which can be heard by all users in a network. However, in cognitive radio (CR) ad hoc networks, different unlicensed users may acquire different available Channel sets. This non-uniform spectrum availability imposes special design challenges for broadcasting in CR ad hoc networks. In this paper, a fully-distributed broadcast protocol in multi-hop CR ad hoc networks without a Common Control Channel is proposed. In our design, we consider practical scenarios that each unlicensed user is not assumed to be aware of the global network topology, the spectrum availability information of other users, and time synchronization information. By intelligently downsizing the original available Channel set and designing the broadcasting sequences and scheduling schemes, our proposed broadcast protocol can provide very high successful broadcast ratio while achieving the shortest average broadcast delay. It can also eliminate broadcast collisions. To the best of our knowledge, this is the first work that addresses the broadcasting challenges specifically in multi-hop CR ad hoc networks under practical scenarios.
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INFOCOM - A distributed broadcast protocol in multi-hop cognitive radio ad hoc networks without a Common Control Channel
2012 Proceedings IEEE INFOCOM, 2012Co-Authors: Yi Song, Jiang XieAbstract:Broadcast is an important operation in wireless ad hoc networks where Control information is usually propagated as broadcasts for the realization of most networking protocols. In traditional ad hoc networks, since the spectrum availability is uniform, broadcasts are delivered via a Common Channel which can be heard by all users in a network. However, in cognitive radio (CR) ad hoc networks, different unlicensed users may acquire different available Channel sets. This non-uniform spectrum availability imposes special design challenges for broadcasting in CR ad hoc networks. In this paper, a fully-distributed broadcast protocol in multi-hop CR ad hoc networks without a Common Control Channel is proposed. In our design, we consider practical scenarios that each unlicensed user is not assumed to be aware of the global network topology, the spectrum availability information of other users, and time synchronization information. By intelligently downsizing the original available Channel set and designing the broadcasting sequences and scheduling schemes, our proposed broadcast protocol can provide very high successful broadcast ratio while achieving the shortest average broadcast delay. It can also eliminate broadcast collisions. To the best of our knowledge, this is the first work that addresses the broadcasting challenges specifically in multi-hop CR ad hoc networks under practical scenarios.
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On the Spectrum Handoff for Cognitive Radio Ad Hoc Networks Without Common Control Channel
Cognitive Radio Mobile Ad Hoc Networks, 2011Co-Authors: Yi Song, Jiang XieAbstract:Cognitive radio (CR) technology is a promising solution to enhance the spectrum utilization by enabling unlicensed users to exploit the spectrum in an opportunistic manner. Since unlicensed users are considered as temporary visitors to the licensed spectrum, they are required to vacate the spectrum when a licensed user reclaims it. Due to the randomness of the appearance of licensed users, disruptions to both licensed and unlicensed communications are often difficult to prevent, which may lead to low throughput of both licensed and unlicensed communications. In this chapter, a proactive spectrum handoff framework for CR ad hoc networks is proposed to address these concerns. In the proposed framework, Channel switching policies and a proactive spectrum handoff protocol are proposed to let unlicensed users vacate a Channel before a licensed user utilizes it to avoid unwanted interference. Network coordination schemes for unlicensed users are also incorporated into the spectrum handoff protocol design to realize Channel rendezvous. Moreover, a distributed Channel selection scheme to eliminate collisions among unlicensed users in a multi-user spectrum handoff scenario is proposed. In our proposed framework, unlicensed users coordinate with each other without using a Common Control Channel, which is highly adaptable in a spectrum-varying environment. We compare our proposed proactive spectrum handoff protocol with a reactive spectrum handoff protocol, under which unlicensed users switch Channels after collisions with licensed transmissions occur under different Channel coordination schemes. Simulation results show that our proactive spectrum handoff outperforms the reactive spectrum handoff approach in terms of higher throughput and fewer collisions to licensed users. Furthermore, our distributed Channel selection can achieve substantially higher packet delivery rate in a multi-user spectrum handoff scenario, compared with existing Channel selection schemes. In addition, we propose a novel three-dimensional discrete-time Markov chain to characterize the process of reactive spectrum handoffs and analyze the performance of unlicensed users. We validate the numerical results obtained from our proposed Markov model against simulation and investigate other parameters of interest in the spectrum handoff scenario. Our proposed analytical model can be applied to various practical network scenarios.
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Performance Analysis of Spectrum Handoff for Cognitive Radio Ad Hoc Networks without Common Control Channel under Homogeneous Primary Traffic
arXiv: Information Theory, 2011Co-Authors: Yi Song, Jiang XieAbstract:Cognitive radio (CR) technology is regarded as a promising solution to the spectrum scarcity problem. Due to the spectrum varying nature of CR networks, unlicensed users are required to perform spectrum handoffs when licensed users reuse the spectrum. In this paper, we study the performance of the spectrum handoff process in a CR ad hoc network under homogeneous primary traffic. We propose a novel three dimensional discrete-time Markov chain to characterize the process of spectrum handoffs and analyze the performance of unlicensed users. Since in real CR networks, a dedicated Common Control Channel is not practical, in our model, we implement a network coordination scheme where no dedicated Common Control Channel is needed. Moreover, in wireless communications, collisions among simultaneous transmissions cannot be immediately detected and the whole collided packets need to be retransmitted, which greatly affects the network performance. With this observation, we also consider the retransmissions of the collided packets in our proposed discrete-time Markov chain. In addition, besides the random Channel selection scheme, we study the impact of different Channel selection schemes on the performance of the spectrum handoff process. Furthermore, we also consider the spectrum sensing delay in our proposed Markov model and investigate its effect on the network performance. We validate the numerical results obtained from our proposed Markov model against simulation and investigate other parameters of interest in the spectrum handoff scenario. Our proposed analytical model can be applied to various practical network scenarios. It also provides new insights on the process of spectrum handoffs. Currently, no existing analysis has considered the comprehensive aspects of spectrum handoff as what we consider in this paper.
Ying Dai - One of the best experts on this subject based on the ideXlab platform.
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Efficient Virtual Backbone Construction without a Common Control Channel in Cognitive Radio Networks
IEEE Transactions on Parallel and Distributed Systems, 2014Co-Authors: Ying Dai, Chunsheng XinAbstract:Virtual backbones have brought about many benefits for routing and data transmission in traditional wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role, and would increase the efficiency of routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks due to opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We analyze the capacity between an active node and a passive node in a single area. Our approach is testified through evaluation of the cost, and also through comparison with other models.
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virtual backbone construction for cognitive radio networks without Common Control Channel
International Conference on Computer Communications, 2013Co-Authors: Ying Dai, Chunsheng XinAbstract:The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks because of the opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We evaluate our approach through extensive simulations.
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INFOCOM - Virtual backbone construction for cognitive radio networks without Common Control Channel
2013 Proceedings IEEE INFOCOM, 2013Co-Authors: Ying Dai, Chunsheng XinAbstract:The advantages of virtual backbones have been proven in wireless networks. In cognitive radio networks (CRNs), virtual backbones can also play a critical role in both routing and data transport. However, the virtual backbone construction for CRNs is more challenging than for traditional wireless networks because of the opportunistic spectrum access. Moreover, when no Common Control Channel is available to exchange the Control information, this problem is even more difficult. In this paper, we propose a novel approach for constructing virtual backbones in CRNs, without relying on a Common Control Channel. Our approach first utilizes the geographical information to let the nodes of a CRN self-organize into cells. Next, the nodes in each cell form into clusters, and a virtual backbone is established over the cluster heads. The virtual backbone is then applied to carry out the end-to-end data transmission. The proposed virtual backbone construction approach requires only limited exchange of Control messages. It is efficient and highly adaptable under the opportunistic spectrum access. We evaluate our approach through extensive simulations.
Sang-jo Yoo - One of the best experts on this subject based on the ideXlab platform.
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Attack Detection Scheme Against Cooperative Spectrum Sensing Data Falsification on Common Control Channel in Cognitive Radio Networks
Wireless Personal Communications, 2016Co-Authors: Yongxu Zou, Sang-jo YooAbstract:Cognitive radio is an intelligent technology designed to help secondary users (SUs) increase their opportunity to access unused spectrum Channels while avoiding interference with the primary users. In cognitive radio networks (CRNs), to find the available Channels, SUs execute cooperative spectrum sensing and exchange Channels-related Control information, namely an available Channels list (ACL), on a Common Control Channel (CCC) before determining which Channels they may transmit. However, some SUs, defined as attackers, could create a security issue by sharing false ACL information with other SUs to increase their own utilization of the available Channels, which significantly decreases the performance of CRNs. In this paper, we propose an efficient detection scheme for CCC security to identify any attacker among the cooperating SUs. In the proposed scheme, all SUs share their ACL information on the CCC, with an associated reputation, which is updated according to its own behavior in each cooperation round, to cooperatively identify attackers. An attacker will be excluded from cooperating group with the result that its updated reputation value exceeds a certain threshold. Simulation results show how to further improve the performance of the proposed scheme by choosing optimized thresholds. In addition, we also illustrate that the proposed scheme can achieve considerable performance improvement compared with a attack detection technique COOPON for secure ACL information exchange.
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a cooperative attack detection scheme for Common Control Channel security in cognitive radio networks
International Conference on Ubiquitous and Future Networks, 2015Co-Authors: Yongxu Zou, Sang-jo YooAbstract:Cognitive radio (CR) is an intelligent technology designed to help secondary users (SUs) increase access opportunity for unused licensed spectrum Channel while avoiding interference to the primary users (PUs). In cognitive radio networks (CRNs), SUs execute cooperative spectrum sensing to find available spectrum Channels and exchange those sensed Channels-related Control information, namely available Channels list (ACL) information, on Common Control Channel (CCC) before determining when and in which data Channels they may communicate. However, some SUs, defined as attackers, could cause security issue on the CCC by sharing false ACL information with other SUs benefit for their own utilization of the available spectrum Channels, which significantly decreases the performance of the CRNs. In this paper, we propose an efficient detection scheme to identify attackers by cooperated SUs for CCC security. In the proposed scheme, all SUs exchange and share their Control information on CCC with a reputation cooperate to identify attackers. The reputation of each SU is updated according to its own historical and recent behavior. Simulation results show that how to further improve the performance of the proposed scheme by choosing optimized thresholds. In addition, we also illustrate the proposed scheme can achieve a considerable performance improvement compared with a selfish attack detection technique (COOPON) for secure ACL information exchange on CCC.
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ICUFN - A cooperative attack detection scheme for Common Control Channel security in cognitive radio networks
2015 Seventh International Conference on Ubiquitous and Future Networks, 2015Co-Authors: Yongxu Zou, Sang-jo YooAbstract:Cognitive radio (CR) is an intelligent technology designed to help secondary users (SUs) increase access opportunity for unused licensed spectrum Channel while avoiding interference to the primary users (PUs). In cognitive radio networks (CRNs), SUs execute cooperative spectrum sensing to find available spectrum Channels and exchange those sensed Channels-related Control information, namely available Channels list (ACL) information, on Common Control Channel (CCC) before determining when and in which data Channels they may communicate. However, some SUs, defined as attackers, could cause security issue on the CCC by sharing false ACL information with other SUs benefit for their own utilization of the available spectrum Channels, which significantly decreases the performance of the CRNs. In this paper, we propose an efficient detection scheme to identify attackers by cooperated SUs for CCC security. In the proposed scheme, all SUs exchange and share their Control information on CCC with a reputation cooperate to identify attackers. The reputation of each SU is updated according to its own historical and recent behavior. Simulation results show that how to further improve the performance of the proposed scheme by choosing optimized thresholds. In addition, we also illustrate the proposed scheme can achieve a considerable performance improvement compared with a selfish attack detection technique (COOPON) for secure ACL information exchange on CCC.
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TDMA based Multi-Channel MAC Protocol for Improving Channel Efficiency in Wireless Ad Hoc Networks
The Journal of Korean Institute of Communications and Information Sciences, 2010Co-Authors: Jun-ho Kim, Jae-kark Choi, Sang-jo YooAbstract:In this paper, we propose a multi-Channel MAC protocol to improve the Channel efficiency and network performance in wireless ad hoc networks. There are two main problems encountered in designing multi-Channel MAC protocols. The first problem is the rendezvous problem and the second is multi-Channel hidden node problem. In order to solve these problems, most of previous researches that have considered multi-Channel MAC protocols use a Common Control Channel to exchange Control packets. However, they have a bottleneck problem at Common Control Channel as increasing the number of data Channels. The proposed MAC protocol solves the multi-Channel hidden node problem using a TDMA scheme and increases the network throughput because transmitting and receiving data at the same time is possible. Also, since there is no Common Control Channel, the network does not suffer from the Common Control Channel saturation problem. Moreover, it achieves energy savings by allowing nodes that are not involved in communication to go into sleep mode. Simulation results show that the proposed MAC protocol improves the network throughput and Channel efficiency and provides energy savings.
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Distributed Coordination Protocol for Common Control Channel Selection in MultiChannel Ad-Hoc Cognitive Radio Networks
IEEE International Conference on Wireless and Mobile Computing Networking and Communications, 2009Co-Authors: Mi-ryeong Kim, Sang-jo YooAbstract:The exponential growth in wireless services has resulted in an overly crowded spectrum. The current state of spectrum allocation indicates that almost all usable frequencies have already been occupied. This makes one pessimistic about the feasibility of integrating emerging wireless services such as large-scale sensor networks into the existing communication infrastructure. Cognitive radio is the emerging dynamic spectrum access technology to achieve open spectrum sharing flexibly and efficiently. It is an intelligent wireless communication system that is aware of its radio environment and is capable of adapting its operation to statistical variations of the radio frequency. Ad-hoc networks in terms of cognitive radio rely on a Common Control Channel (CCC) for operation. Control signals are used to enable cooperation communicate through a Common Control Channel. However, Common Control Channel may not be always available in an open spectrum allocation scheme due to interference and coexistence with primary systems (PS) of the spectrum. In this paper, we propose a novel Common Control Channel selection protocol (DCP-CCC) in a distributed way based on appearance patterns of PS and connectivity among nodes. Using simulation results, we evaluate the performance of the proposed CCC selection scheme.