Addressing the control channel design problem: OFDM-based transform domain communication system in cognitive radio

Han, Chuan; Wang, Jun; Yang, Yaling; Li, Shaoqian

doi:10.1016/j.comnet.2007.11.001

Cited by 37 publications

(23 citation statements)

References 15 publications

(25 reference statements)

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“…Additionally, other topics are presented to facilitate basic spectrum management functionalities in cognitive radio networks, involving common control channel [75], interference management [76], and power control [77], amongst others. As the performance of CR networking functionalities directly depends on the properties of the spectrum band in use, a comprehensive solution, jointly considering beamforming, scheduling and power allocation, has been proposed for CR network downlinks to achieve high sum-rate throughput with tolerable interference [78].…”

Section: Cognitive Radiomentioning

confidence: 99%

A survey of next generation mobile communications research in China

Tian

Zheng

et al. 2011

Chin. Sci. Bull.

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With the rapid development of wireless communication networks, the fourth generation (4G) has emerged to move beyond the limitations of the third generation (3G), with increased bandwidth, enhanced quality of services, and reduced costs of resources. In this paper, we discuss the key technologies of 4G and focus on surveying the ongoing research in 4G communications in China. The 4G technologies under investigation include multicarrier transmission, multiple antenna techniques, carrier aggregation, relays, cognitive radio, distributed antenna systems, network convergence, and network self-optimization. These technologies are the building blocks of 4G and contribute largely to the requirements of International Mobile Telecommunications Advanced (IMT-Advanced). For each technology, its benefits, research topics, and some existing approaches are examined. Finally, we briefly discuss the challenges and future research issues in 4G systems. multicarrier transmission, multiple antenna techniques, carrier aggregation, relay, cognitive radio, distributed antenna system, network convergence, network self-optimization Citation:The limitations of the third generation (3G) and the rapid growth in user demands has called for more advanced and efficient technologies for new generation systems. The upcoming fourth generation (4G) mobile communication systems are expected to solve the still-remaining problems of 3G systems and to provide a wide variety of adaptable services for mobile and nomadic users by using integrated heterogeneous network infrastructure. Based on a comprehensive and secure internet protocol (IP) solution, various services, such as voice, video, broadcasting media, and Internet, will be provided to users with high data rates anytime and anywhere. This is also known as the always best connected concept stating that a user can have the best service connection regardless of time and location.According to the steadily increasing demands and technology developments, wireless communication evolution can be grouped into different generations of networks. Each new generation has brought advances that revolutionized the field of mobile communication. The first generation (1G), initiating commercial mobile voice services with analog techniques, built the basic structure of mobile communications and solved many fundamental problems such as the multiplexing frequency band, roaming across domains, non-interrupted communication in mobile circumstances, and so on. The second generation (2G) of wireless technology, which marked the switching of mobile communication technology from analog to digital, offered higher capacity and lower costs for network operators as well as messages and low-rate data services for users, by using a circuit switch infrastructure. Working under 2G's framework, 2.5G brought the internet into mobile personal communications based on a packet switched radio connection technique. 3G systems, a mixture of packet and circuit-switched networks, are committed to achieving greater network capacity

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Section: Cognitive Radiomentioning

confidence: 99%

A survey of next generation mobile communications research in China

Tian

Zheng

et al. 2011

Chin. Sci. Bull.

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“…In our proposal we assume that there is a spectrum manager whose rules are abided by SUs, and there is a control channel dedicated to the communication between manager and SUs [21,22]. Every time a white space appears, the SUs detect it and estimate their B i s. These estimates are made by each SU based on local information and are not available to the manager.…”

Section: Spectrum Sharing Modelmentioning

confidence: 99%

Dynamic spectrum sharing in cognitive radio networks using truthful mechanisms and virtual currency

et al. 2013

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In cognitive radio networks, there are scenarios where secondary users (SUs) utilize opportunistically the spectrum originally allocated to primary users (PUs). The spectrum resources available to SUs fluctuates over time due to PUs activity, SUs mobility and competition between SUs. In order to utilize these resources efficiently spectrum sharing techniques need to be implemented. In this paper we present an approach based on game-theoretical mechanism design for dynamic spectrum sharing. Each time a channel is not been used by any PU, it is allocated to SUs by a central spectrum manager based on the valuations of the channel reported by all SUs willing to use it. When an SU detects a free channel, it estimates its capacity according to local information and sends the valuation of it to the spectrum manager. The manager calculates a conflict-free allocation by implementing a truthful mechanism. The SUs have to pay for the allocation an amount which depends on the set of valuations. The objective is not to trade with the spectrum, but to share it according to certain criteria. For this, a virtual currency is defined and therefore monetary payments are not necessary. The spectrum manager records the credit of each SU and redistributes the payments to them after each spectrum allocation. The mechanism restricts the chances of each SU to be granted the channel depending on its credit availability. This credit restriction provides an incentive to SUs to behave as benefit maximizers. If the mechanism is truthful, their best strategy is to communicate the true valuation of the channel to the manager, what makes possible to implement the desired spectrum sharing criteria. We propose and evaluate an implementation of this idea by using two simple mechanisms which are proved to be truthful, and that are tractable and approximately efficient. We show the flexibility of these approach by illustrating how these mechanisms can be modified to achieve different sharing objectives which are trade-offs between efficiency and fairness. We also investigate how the credit restriction and * Corresponding author Email addresses: jrvidal@dcom.upv.es (José R. Vidal), vpla@dcom.upv (Vicent Pla), lguijar@dcom.upv (Luis Guijarro), jmartinez@dcom.upv.es (Jorge Martinez-Bauset)1 Telephone: +34 96 3879765, Fax: +34 96 3877309

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“…In our proposal we assume that there is a spectrum manager whose rules are abided by SUs, and there is a control channel dedicated to the communication between manager and SUs [5]. Every time that a white space appears, the SUs detect it and estimate B i .…”

Section: Spectrum Sharing Modelmentioning

confidence: 99%

Flexible Dynamic Spectrum Allocation in Cognitive Radio Networks Based on Game-Theoretical Mechanism Design

et al. 2011

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Abstract. In this paper we present an approach based on game-theoretical mechanism design for dynamic spectrum allocation in cognitive radio networks. Secondary users (SU) detect when channels can be used without disrupting any primary user and try to use them opportunistically. When an SU detects a free channel, it estimates its capacity and sends the valuation of it to a central manager. The manager calculates a conflict-free allocation by implementing a truthful mechanism. The SUs have to pay for the allocation an amount which depends on the set of valuations, and they behave as benefit maximizers. We present and test two mechanisms implementing this idea which are proved to be truthful, and that are tractable and approximately efficient. We show the flexibility of these mechanisms by illustrating how they can be modified to achieve other objectives such as fairness and also how they can operate without really charging the SUs.

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Addressing the control channel design problem: OFDM-based transform domain communication system in cognitive radio

Cited by 37 publications

References 15 publications

A survey of next generation mobile communications research in China

A survey of next generation mobile communications research in China

Dynamic spectrum sharing in cognitive radio networks using truthful mechanisms and virtual currency

Flexible Dynamic Spectrum Allocation in Cognitive Radio Networks Based on Game-Theoretical Mechanism Design

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