scholarly journals Joint Channel Assignment and Power Allocation Based on Maximum Concurrent Multicommodity Flow in Cognitive Radio Networks

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Ahmed Salah ◽  
Heba M. Abdel-Atty ◽  
Rawya Y. Rizk
Keyword(s):  
Cognitive Radio ◽  
Cognitive Radio Network ◽  
Multipath Routing ◽  
Multicommodity Flow ◽  
Radio Network ◽  
Communication Paradigm ◽  
Multicommodity Flow Problem ◽  
Promising Solution ◽  
Joint Channel ◽  
Networking Technology

Emerging cognitive radio networking technology potentially provides a promising solution to the spectrum underutilization problem in wireless access. In this paper, a cross-layer routing for secondary multihop is studied in cognitive radio network operating in television white spaces. The framework considers a joint channel, power, and routing assignment under signal to interference noise ratio (SINR) constraints. The problem is formulated as a maximum concurrent multicommodity flow problem. The goal of conducting this research is to develop a new routing protocol for the secondary multihop cognitive radio network. Therefore, the objective of this paper focuses on maximizing a flow rate scaling factor. Moreover, the paper focuses on achieving multipath routing when it is possible under SINR constraints to utilize all possible unused channels efficiently. The numerical results proved the strength of the proposed algorithm in its routing ability under the physical model of SINR, in addition to the ability of using multipath routing if there are available free channels to be used in the cognitive communication paradigm.

scholarly journals Wireless Transport Protocol Variants for Cognitive Radio Networks

2018 ◽  
Vol 3 (3) ◽  
pp. 106-112
Author(s):  
G Shine Let ◽  
G Josemin Bala ◽  
W. Magdalene
Keyword(s):  
Cognitive Radio ◽  
Frequency Band ◽  
Cognitive Radio Networks ◽  
Cognitive Radio Network ◽  
Transmission Control Protocol ◽  
Radio Networks ◽  
Transport Protocol ◽  
Radio Network ◽  
Communication Paradigm ◽  
Wireless Transport

Scarce wireless resources, lead to development of cognitive radio network as a solution to unlicensed users communication in the licensed frequency band. In response to the behavior of licensed users communication, unlicensed users communication need to change from one frequency band to another band. In this communication paradigm, the performance of unlicensed users transmission control protocol gets degraded due to the features of cognitive radio network. To overcome this, several authors suggested quite a few modifications in the existing wireless transport protocol for cognitive radio network environment. This paper gives an overview of different transport protocols used for unlicensed users’ communication in cognitive radio networks

scholarly journals A research survey on scheduling techniques in lte-based network and its state of art

2020 ◽  
Vol 3 (2) ◽  
pp. 51-58
Author(s):  
Srinivasa R K ◽  
Hemantha Kumar A.R2
Keyword(s):  
Cognitive Radio ◽  
Frequency Band ◽  
Cognitive Radio Network ◽  
Transmission Control Protocol ◽  
Radio Networks ◽  
Transport Protocol ◽  
Radio Network ◽  
Research Survey ◽  
Communication Paradigm ◽  
Wireless Transport

Scarce wireless resources, lead to development of cognitive radio network as a solution to unlicensed users communication in the licensed frequency band. In response to the behavior of licensed users communication, unlicensed users communication need to change from one frequency band to another band. In this communication paradigm, the performance of unlicensed users transmission control protocol gets degraded due to the features of cognitive radio network. To overcome this, several authors suggested quite a few modifications in the existing wireless transport protocol for cognitive radio network environment. This paper gives an overview of different transport protocols used for unlicensed users’ communication in cognitive radio networks.

scholarly journals A Joint Channel Selection and Routing Protocol for Cognitive Radio Network

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Yuting Wang ◽  
Guoqiang Zheng ◽  
Huahong Ma ◽  
Yang Li ◽  
Jishun Li
Keyword(s):  
Cognitive Radio ◽  
Routing Protocol ◽  
Cognitive Radio Network ◽  
Great Influence ◽  
Channel Selection ◽  
Packet Transmission ◽  
Data Delivery ◽  
Radio Network ◽  
Channel Switching ◽  
Joint Channel

In cognitive radio network, the activities of primary users will cause great influence on the stability of multiple hops routes between cognitive users. In this regard, a joint channel selection and routing protocol, termed as CSRP, is proposed to ensure route stability and reduce route latency between cognitive users. The channel availability based on historical information and the channel switching delay are used as the channel selection criteria to choose the end-to-end shortest route which possesses high data delivery probabilities and low delays. Besides, simulation results show that the proposed protocol has a better performance in terms of packet transmission delay and data delivery rate compared with the routing protocols based on delay (TDRP) and based on joint routing and channel allocation (PUB-JRCA).

Basic Spectrum Sensing Techniques

2019 ◽  
pp. 70-84
Author(s):  
Bhuvaneswari P. T. V. ◽  
Bino J.
Keyword(s):  
Cognitive Radio ◽  
Spectrum Sensing ◽  
Spectrum Sharing ◽  
Cognitive Radio Network ◽  
Radio Spectrum ◽  
Spectrum Management ◽  
Radio Network ◽  
Spectrum Band ◽  
Radio Systems ◽  
Networking Technology

Cognitive radio network (CRN) is an upcoming networking technology that can utilize both radio spectrum and wireless resources efficiently based on the information gathered from the past experience. There are two types of users in CRN, namely primary and secondary. PUs (PU) have the license to operate in certain spectrum band while the secondary (SU) or cognitive radio (CR) users do not have the license to operate in the desired band. However, they can opportunistically utilize the unused frequency bands. Spectrum sensing, spectrum management, spectrum sharing, and spectrum mobility are the four major functions of cognitive radio systems. The main objective of spectrum sensing is to provide better spectrum access to CR users, without causing any harmful interference to PUs. Sensing accuracy is considered as the most important factor to determine the performance of cognitive radio network. In this chapter, the challenges and requirement involved in spectrum sensing are detailed. Further, various spectrum sensing basic techniques are also discussed in detail.

Architecture of Cognitive Radio Networks

2013 ◽  
pp. 125-152 ◽  
Author(s):  
Jyoti Sekhar Banerjee ◽  
Arpita Chakraborty ◽  
Koushik Karmakar
Keyword(s):  
Cognitive Radio ◽  
Network Architecture ◽  
Ad Hoc ◽  
Cognitive Radio Network ◽  
Cognitive Radios ◽  
Radio Link ◽  
Radio Network ◽  
Communication Paradigm ◽  
Hoc Networks

Today’s wireless networks are characterized by fixed spectrum assignment policy. The spectral scarcity and the inefficiency in the spectrum usage necessitate a new communication paradigm to exploit the existing wireless spectrum, opportunistically. Cognitive Radio (CR) is that very paradigm for wireless communication, in which either a network or a wireless node reconfigures its transmission or reception parameters to communicate efficiently avoiding interference with licensed or unlicensed users. CR adapts itself to the newer environment on the basis of its intelligent sensing and captures the best available spectrum to meet user communication requirements. When the radio link features are extended to the network layer, the cognitive radios form the cognitive radio network. This book chapter is focused on cognitive radio network, architecture of the CR, and its relevance in the wireless and mobile Ad Hoc networks.

scholarly journals Wireless transport protocol variants for cognitive radio networks

2020 ◽  
Vol 3 (3) ◽  
pp. 106-112
Author(s):  
G Shine Let ◽  
G Josemin Bala ◽  
W. Magdalene
Keyword(s):  
Cognitive Radio ◽  
Frequency Band ◽  
Cognitive Radio Networks ◽  
Cognitive Radio Network ◽  
Transmission Control Protocol ◽  
Radio Networks ◽  
Transport Protocol ◽  
Radio Network ◽  
Communication Paradigm ◽  
Wireless Transport

Scarce wireless resources, lead to development of cognitive radio network as a solution to unlicensed users communication in the licensed frequency band. In response to the behavior of licensed users communication, unlicensed users communication need to change from one frequency band to another band. In this communication paradigm, the performance of unlicensed users transmission control protocol gets degraded due to the features of cognitive radio network. To overcome this, several authors suggested quite a few modifications in the existing wireless transport protocol for cognitive radio network environment. This paper gives an overview of different transport protocols used for unlicensed users’ communication in cognitive radio networks.

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