Performance of cognitive hybrid automatic repeat reQuest:
stop-and-wait
Performance of cognitive hybrid automatic repeat reQuest:
stop-and-wait
Detecting spectrum holes and efficiently accessing them are the two basic functions that enable a cognitive radio (CR) to make use of the licensed spectrums of a primary radio (PR). In this paper, we consider a CR scheme, which opportunistically accesses a PR channel for communication between a pair of nodes based on the stop-and-wait hybrid automatic repeat request (SW-HARQ). Hence, it is referred to as the cognitive SW-HARQ (CSW-HARQ) arrangement. In our CSW-HARQ system, the PR channel is modelled as a two-state Markov chain having 'On' and 'Off' states. The CR may only access the PR channel in its 'Off' state. In this paper, we analyze both the throughput and delay performance of the CSW-HARQ system, for which a range of closed-form formulas are derived that are also validated by simulation results. Our performance results show that both the activities of PR users and the reliability of the CR channel have a substantial impact on the achievable performance of the CR system.
1-5
Rehman, Ateeq
e5f10d6d-7fc7-45f2-a731-ad97c94ef3ee
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
11 May 2015
Rehman, Ateeq
e5f10d6d-7fc7-45f2-a731-ad97c94ef3ee
Yang, Lieliang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Rehman, Ateeq, Yang, Lieliang and Hanzo, Lajos
(2015)
Performance of cognitive hybrid automatic repeat reQuest:
stop-and-wait.
IEEE Vehicular Technology Conference, .
(doi:10.1109/VTCSpring.2015.7146009).
Abstract
Detecting spectrum holes and efficiently accessing them are the two basic functions that enable a cognitive radio (CR) to make use of the licensed spectrums of a primary radio (PR). In this paper, we consider a CR scheme, which opportunistically accesses a PR channel for communication between a pair of nodes based on the stop-and-wait hybrid automatic repeat request (SW-HARQ). Hence, it is referred to as the cognitive SW-HARQ (CSW-HARQ) arrangement. In our CSW-HARQ system, the PR channel is modelled as a two-state Markov chain having 'On' and 'Off' states. The CR may only access the PR channel in its 'Off' state. In this paper, we analyze both the throughput and delay performance of the CSW-HARQ system, for which a range of closed-form formulas are derived that are also validated by simulation results. Our performance results show that both the activities of PR users and the reliability of the CR channel have a substantial impact on the achievable performance of the CR system.
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07146009.pdf
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Published date: 11 May 2015
Organisations:
Comms, Signal Processing & Control
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Local EPrints ID: 382069
URI: http://eprints.soton.ac.uk/id/eprint/382069
PURE UUID: 0d7b2366-d16c-4ecc-a1da-f3ab99f6e851
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Date deposited: 23 Oct 2015 10:16
Last modified: 18 Mar 2024 02:49
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Author:
Ateeq Rehman
Author:
Lieliang Yang
Author:
Lajos Hanzo
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