On the feasibility of synchronous, retransmission-based cognitive networks

Name: On the feasibility of synchronous, retransmission-based cognitive networks
Author: Ercan, Ali Özer, Sunay, Mehmet Oğuz

İsim	On the feasibility of synchronous, retransmission-based cognitive networks
Yazar	Ercan, Ali Özer, Sunay, Mehmet Oğuz
Basım Tarihi:	2016-01
Basım Yeri	- Elsevier
Konu	Cognitive radio, Multiaccess communication, Opportunistic multiple access
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1570-8705
Kayıt Numarası	a18c2662-6d50-4673-bf54-8dba22481e4e
Lokasyon	Electrical & Electronics Engineering, Computer Science
Tarih	2016-01
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	This paper presents a new, joint Markov chain model for the primary and secondary traffic in a cognitive radio network to assess the feasibility of opportunistic spectrum access for different operational scenarios, validated by extensive realistic Monte-Carlo simulations. Enhancing on the current literature, the generalized model allows for the consideration of a retransmission-based traffic as well as the presence of transmission queues for the primary user. The generalized model also allows for the investigation of the system behavior in the presence of imperfect sensing at the secondary users. The presented model is applicable for all primary user traffic models that use discrete-time Markov chains. An infinitely backlogged secondary user network is considered to investigate the maximum possible network utilization. The paper concludes that a percentile channel occupation of the primary user on its own is not always a sufficient metric to assess whether secondary transmission is feasible. It is shown that the interplay between primary network traffic characteristics, as well as the sensing frequency and probabilities of missed detection and false alarm for the secondary network detector are of primal importance for such feasibility claims. The results reveal that the preferred sensing frequency for the secondary users is a function of the primary user traffic pattern and that the commonly used frequency of sensing every transmission slot is not always optimal. The results also show that when sensing frequency is low, secondary utilization decreases with more bursty primary traffic, whereas the impact on primary utilization becomes less.
DOI	10.1016/j.adhoc.2015.08.012
Cilt	36

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On the feasibility of synchronous, retransmission-based cognitive networks

Yazar Ercan, Ali Özer, Sunay, Mehmet Oğuz

Basım Tarihi 2016-01

Basım Yeri - Elsevier

Konu Cognitive radio, Multiaccess communication, Opportunistic multiple access

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1570-8705

Kayıt Numarası a18c2662-6d50-4673-bf54-8dba22481e4e

Lokasyon Electrical & Electronics Engineering, Computer Science

Tarih 2016-01

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin This paper presents a new, joint Markov chain model for the primary and secondary traffic in a cognitive radio network to assess the feasibility of opportunistic spectrum access for different operational scenarios, validated by extensive realistic Monte-Carlo simulations. Enhancing on the current literature, the generalized model allows for the consideration of a retransmission-based traffic as well as the presence of transmission queues for the primary user. The generalized model also allows for the investigation of the system behavior in the presence of imperfect sensing at the secondary users. The presented model is applicable for all primary user traffic models that use discrete-time Markov chains. An infinitely backlogged secondary user network is considered to investigate the maximum possible network utilization. The paper concludes that a percentile channel occupation of the primary user on its own is not always a sufficient metric to assess whether secondary transmission is feasible. It is shown that the interplay between primary network traffic characteristics, as well as the sensing frequency and probabilities of missed detection and false alarm for the secondary network detector are of primal importance for such feasibility claims. The results reveal that the preferred sensing frequency for the secondary users is a function of the primary user traffic pattern and that the commonly used frequency of sensing every transmission slot is not always optimal. The results also show that when sensing frequency is low, secondary utilization decreases with more bursty primary traffic, whereas the impact on primary utilization becomes less.

DOI 10.1016/j.adhoc.2015.08.012

Cilt 36