Performance analysis of IEEE 802.22 wireless regional area network in the presence of digital video broadcasting – second generation terrestrial broadcasting services

Popescu, Vlad; Fadda, Mauro; Murroni, Maurizio

doi:10.1049/iet-com.2015.1117

Cited by 26 publications

(5 citation statements)

References 23 publications

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“…Conversely, one or more CPEs associated to it are not hidden from the incumbent as shown in Figure 2. This problem is said to be the hidden incumbent problem [24], [25], [26]. In this case, the CPE can identify the incumbent transmission by performing periodic in-band channel sensing, however the BS cannot.…”

Section: The Hidden Incumbent Problemmentioning

confidence: 99%

A framework for dynamic selection of backoff stages during initial ranging process in wireless networks

Mufti

Afzal

Awan

et al. 2017

Journal of Systems and Software

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Following are the answers to the comments of reviewers. The answers are in blue text. All queries have been addressed and author(s) have tried their best to make modifications as suggested. Reviewer #1: The work provides an innovative mathematical methodology regarding the selection process and association process for IEEE 802.22 networks. The approach is largely evaluated for several cases and is robust enough to serve as a knowledge base for the Base Station. Since the discussed environment is related to TV white spaces I would suggest to add to the introduction a well established review work on the topic, namely,

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Section: The Hidden Incumbent Problemmentioning

confidence: 99%

A framework for dynamic selection of backoff stages during initial ranging process in wireless networks

Mufti

Afzal

Awan

et al. 2017

Journal of Systems and Software

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“…This combination of large coverage area and fixed frequency planning offers a unique opportunity for secondary access in TV bands, as the primary usage can be easily identified and stored in a geo-location database. Spectrum sensing as a detection mechanism could be employed to complement the geolocation database for improved detection accuracy (Popescu et al, 2016a;Popescu et al, 2016b;Sendrei et al, 2015).…”

Section: Protection Of Dvb-t Receiversmentioning

confidence: 99%

Coexistence and interference analysis in TV white spaces

Kimani

2017

Int. j. adv. appl. sci.

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The demand for wireless connectivity is increasing exponentially resulting in an unprecedented demand on the limited radio spectrum. Due to the current fixed spectrum licensing scheme, it is becoming increasingly arduous to find extra spectrum resulting in a paradigm shift towards efficient utilization of radio spectrum in order to address the spectrum scarcity. The transition from analogue to digital terrestrial television has freed-up some spectrum thereby creating unique opportunities for exploitation of locally underused portions of the TV bands referred to as TV white spaces (TVWS) and their exploitation offers an attractive way of making efficient use of radio spectrum as long as the secondary users do not interfere with the primary users. This is enabled by employing cognitive radio technology that allows for dynamic spectrum access. This paper investigates the aspect of interference in TV White spaces and the possibility of mutual coexistence between primary users and secondary users operating in TV White spaces. The impact of interfering signals is undertaken to show the probability of interference in both same channel and different adjacent channels scenarios. The interference analysis is carried out using the SEAMCAT simulation software. Simulation results show that in a power limited secondary network, vacation of cognitive users from active spectrum bands is crucial for ensuring coexistence. The various interference mitigation mechanisms employed by CR networks are also reviewed. In TV white spaces, mitigating interference is vital not only for primary user protection, but also for ensuring the quality of service of the secondary users.

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“…The directional antenna is used for transmitting or receiving data, whereas the omnidirectional antenna is capable of sensing whether the operating channel is busy or not. To avoid causing harmful interference to the PUs, the listen-before-talk access scheme in the IEEE 802.22 standard [ 36 ] is adopted. In this scheme, the SU must perform spectrum sensing at the beginning of each time slot and then transmits its data transmission in the rest of the slot only when the operating channel is detected to be idle.…”

Section: System Model Descriptionmentioning

confidence: 99%

Spectrum Handoffs Based on Preemptive Repeat Priority Queue in Cognitive Radio Networks

Yang

Tan

Liang

et al. 2016

Sensors

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Cognitive radio can significantly improve the spectrum efficiency, and spectrum handoff is considered as an important functionality to guarantee the quality of service (QoS) of primary users (PUs) and the continuity of data transmission of secondary users (SUs). In this paper, we propose an analytical framework based on a preemptive repeat identical (PRI) M/G/1 queuing network model to characterize spectrum handoff behaviors with general service time distribution of both primary and secondary connections, multiple interruptions and transmission delay resulting from the appearance of primary connections. Then, we derive the close-expression of the extended data delivery and the system sojourn time in both staying and changing scenarios. In addition, based on analysis of spectrum handoff behaviors resulting from multiple interruptions caused by the appearance of the primary connections, we investigate the traffic-adaptive policy, by which the considered SU will optimally adjust its handoff spectrum policy. Moreover, we investigate the admissible region and provide the reference for designing the admission control rule for the arriving secondary connection requests. Finally, simulation results verify that our proposed analytical framework is reasonable and can provide the reference for executing the optimal spectrum handoff strategy and designing the admission control rule for the SU in cognitive radio networks.

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Performance analysis of IEEE 802.22 wireless regional area network in the presence of digital video broadcasting – second generation terrestrial broadcasting services

Cited by 26 publications

References 23 publications

A framework for dynamic selection of backoff stages during initial ranging process in wireless networks

A framework for dynamic selection of backoff stages during initial ranging process in wireless networks

Coexistence and interference analysis in TV white spaces

Spectrum Handoffs Based on Preemptive Repeat Priority Queue in Cognitive Radio Networks

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