Journal ArticleDOI
CPC-based backward-compatible network access for LTE cognitive radio cellular networks
TLDR
It is shown that the blocking ratio of LTE-CR can be reduced notably compared to that of conventional LTE without CR, and the average user throughput of LTE can be improved with near-zero blocking ratio by offloading users to complementary cognitive spectra.Abstract:
Network access plays an important role in LTE cognitive radio (LTE-CR) cellular networks in determining users’ experiences. An overview is first carried out on network access schemes in existing cognitive cellular networks such as IEEE 802.22 and IEEE 1900.4, based on which it can be seen that cognitive pilot channel (CPC)-based network access is a promising scheme for LTECR, which may provide fast network access and put no stringent requirements on terminals. Next, considering the implementation issues of CPC in practical systems, a CPC-based backward- compatible network access scheme should be designed for LTE-CR to facilitate the application of CR in LTE networks, which could exploit existing LTE structures and technologies to carry CPC information. To achieve this, a new system information block (SIB) should be designed to carry CPC on a current physical downlink shared channel with little standards effort. Moreover, load awareness is introduced so that LTE-CR is activated only when the system load is high. The complete process of this SIB-CPC-based backward-compatible and loadaware network access is described, and its performance is evaluated via simulations. It is shown that the blocking ratio of LTE-CR can be reduced notably compared to that of conventional LTE without CR. Moreover, by selecting an appropriate load threshold to activate LTE-CR, the average user throughput of LTE can be improved with near-zero blocking ratio by offloading users to complementary cognitive spectra.read more
Citations
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Opportunistic Two-Way Full-Duplex Relay Selection in Underlay Cognitive Networks
Bin Zhong,Zhongshan Zhang +1 more
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Joint optimization of spectrum and energy efficiency in cognitive radio networks
Shaowei Wang,Chonggang Wang +1 more
TL;DR: Simulation results validate the effectiveness and efficiency of the proposed algorithms, which can produce the unique globally optimal solution of the original multi-objective optimization problem.
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Signal Detection and Optimal Antenna Selection for Ambient Backscatter Communications With Multi-Antenna Tags
Chen Chen,Gongpu Wang,Panagiotis D. Diamantoulakis,Ruisi He,George K. Karagiannidis,Chintha Tellambura +5 more
TL;DR: This paper designs a blind detector based on the generalized likelihood ratio test (GLRT) without using channel state information (CSI), signal power and noise variance, and develops the optimal backscatter antenna selection scheme.
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Survey on NOMA and Spectrum Sharing Techniques in 5G
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References
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Proceedings ArticleDOI
A novel on-demand cognitive pilot channel enabling dynamic spectrum allocation
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Journal ArticleDOI
Self-organization paradigms and optimization approaches for cognitive radio technologies: a survey
TL;DR: In this article, a survey of cognitive radio functionalities with self-organization features is presented, including critical functionalities of MAC and network-layer operations, including common control channel management, cooperative spectrum sensing, bioinspired spectrum sharing, network scalability and adaptive routing.
Journal ArticleDOI
Architecture and enablers for optimized radio resource usage in heterogeneous wireless access networks: The IEEE 1900.4 Working Group
Soodesh Buljore,Hiroshi Harada,Stanislav Filin,P. Houze,Kostas Tsagkaris,Oliver Holland,Klaus Nolte,Tim Farnham,Vladimir Ivanov +8 more
TL;DR: IEEE P1900.4 facilitates the distributed dynamic optimization of the usage of spectrum offered by the heterogeneous wireless network, relying on a collaborative information exchange between networks and mobile devices, thereby acting as a common means to improve overall composite capacity and quality of service for the served networks.