Coexistence challenges for heterogeneous cognitive wireless networks in TV white spaces

Ghosh, Chandra Kanta; Roy, Sumit; Cavalcanti, Dave

doi:10.1109/mwc.2011.5999761

Cited by 131 publications

(74 citation statements)

References 14 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It can be noted that location is usually determined based on GPS connection, which may be available for certain types of secondary devices. Therefore, it is most likely that fixed devices will be used in rural areas where the conditions will change slowly, whereas portable devices will be more appropriate for use in metropolitan areas [20].…”

Section: The Cognitive Radio (Cr) Networkmentioning

confidence: 99%

See 1 more Smart Citation

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

With the advent of analog to digital transition in TV broadcasting, a substantial amount of spectrum has become available in TV bands. To take advantage of this, the idea for cognitive radios was introduced for two major reasons: better utilization of spectrum in urban areas and facilitation of wireless connectivity in rural areas. To achieve these two goals, however, many challenges have to be addressed first. Considering that these frequencies are commonly licensed, besides primary user detection, a serious challenge remains the detection and identification of other secondary devices and networks. The problems arising from this issue concern the coexistence problems happening from having several primary and secondary networks of different technologies cohabiting the same licensed spectrum simultaneously and from many secondary systems/users coexisting at the same place while using identical or different technologies. In this survey we provide a review of existing works and outline new challenges regarding coexistence and self-coexistence in heterogeneous wireless networks in TV White Spaces including a comparative analysis between selected coexistence mechanisms.

show abstract

Section: The Cognitive Radio (Cr) Networkmentioning

confidence: 99%

“…Therefore to enable a fair coexistence between heterogeneous wireless networks in TVWS, a coexistence mechanism must be implemented, that addresses these three main challenges: spectrum sharing, interference mitigation and spectrum detection [20], as further detailed in Table 3.…”

Section: Coexistence Challenges For Cr Network In Tvwsmentioning

confidence: 99%

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Maloku

Fazliu

Ibrani

2018

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

show abstract

“…[6] went further to explain that to state that interference can also occur amongst secondary users and among primary users when there is more than one primary or secondary user in the system. Increasing the power of nodes transmitting can help solve problems of hidden node and knowing the location and channel gain between the primary user and secondary users.…”

Section: Interference and Channel Modellingmentioning

confidence: 99%

“…The TV white space which is the unused spectrum allocated for television services until recently belongs to the lower frequency range and meet the demand of the recently published rules as published by FCC [5]. The rule is aimed at regulating unlicensed secondary operation in the TV white space where the devices are divided into two categories: fixed and personal/portable as shown by Ghosh et al, [6]. The fixed devices can transmit up to 4 W Equivalent Isotropically Radiated Power (EIRP) with a Power Spectral Density (PSD) of 16.7 mW/100 kHz.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Фарук¹,

Gumel²,

Oloyode³

et al. 2013

IJCNS

View full text Add to dashboard Cite

The rapid growth in demand for broadband wireless services coupled with the recent developmental work on wireless communications technology and the static allocation of the spectrum have led to the artificial scarcity of the radio spectrum. The traditional command and control model (Static allocation) of spectrum allocation policy allows for severe spectrum underutilization. Spectrum allocated to TV operators can potentially be shared by wireless data services, either when the primary service is switched off or by exploiting spatial reuse opportunities. This paper describes a hybrid access scheme based on CSMA/CA and TDMA MAC protocols for use in the TV bands. The approach allows secondary users (SU) to operate in the presence of the primary users (PU) and the OPNET simulation and modelling software has been used to model the performance of the scheme. An analysis of the results shows that, the proposed schemes protect the primary user from harmful Interference from the secondary user. In terms of delay, it was found that packet arrival rates, data rates and the number of secondary users have significant effects on delay.

show abstract

“…Cognitive Radio (CR) is an auspicious technology for solving the problem of the coexisting of spectrum paucity for new applications [2]. Ultimately, CR is an intellectual transceiver, which can dynamically sense the network environment.…”

Section: Introductionmentioning

confidence: 99%

Traffic Adaptive Synchronized Cluster Based MAC Protocol for Cognitive Radio Ad Hoc Network

et al. 2017

View full text Add to dashboard Cite

Abstract. In wireless communication, Cognitive Radio Network (CRN) is the contemporary research area to improve efficiency and spectrum utilization. It is structured with both licensed users and unlicensed users. In CRN, unlicensed users also called Cognitive Radio (CR) users are permitted to utilize the free/idle of licensed channels without harmful interference to licensed users. However, accessing idle channels is the big challenging issue due to licensed users' activities. A large number of cluster based MAC protocol have been proposed to solve this issue. In this paper, we have come up with a Traffic Adaptive Synchronized Cluster Based MAC Protocol for Cognitive Radio Ad Hoc Network, with the target of creating cluster structure more vigorous to the licensed users' channel re-occupancy actions, maximize throughput, and minimize switching delay, so that CR users be able to use the idle spectrum more efficiently. In our protocol, clusters are formed according to Cluster Identification Channel (CIC) and inter-communication is completed without gateway nodes. Finally, we have analysed and implemented our protocol through simulation and it provides better performance in terms of different performance metrics.

show abstract

Coexistence challenges for heterogeneous cognitive wireless networks in TV white spaces

Cited by 131 publications

References 14 publications

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

A Survey on Coexistence in Heterogeneous Wireless Networks in TV White Spaces

Performance Analysis of Hybrid MAC Protocol for Cognitive Radio Networks

Traffic Adaptive Synchronized Cluster Based MAC Protocol for Cognitive Radio Ad Hoc Network

Contact Info

Product

Resources

About