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Pragmatic distributed algorithm for spectral access in cooperative cognitive radio networks

Pragmatic distributed algorithm for spectral access in cooperative cognitive radio networks
Pragmatic distributed algorithm for spectral access in cooperative cognitive radio networks
A pragmatic distributed algorithm (PDA) is proposed for supporting the efficient spectral access of multiple Primary Users (PUs) and Cognitive Users (CUs) in cooperative Cognitive Radio (CR) networks. The novelty of our PDA is that the PUs negotiate with the CUs concerning the specific amount of relaying and transmission time, the CU is granted, which the CU will either accept or decline. The CUs may serve as relay nodes for relaying the signal received from the PUs to their destinations, while both the PUs' and the CUs' minimum rate requirements are satisfied. This will reduce the required transmission power and/or increase the transmission rate of the PU. Our results show that the proposed scheme performs better than the benchmarker, despite its significantly lower overhead and complexity. Moreover, we show that the cooperative spectral access based on our PDA reaches an equilibrium, when it is repeated for a sufficiently long duration. These benefits are achieved, because the PUs are motivated to cooperate by the incentive of achieving a higher PU rate, whilst non-cooperation can be discouraged with the aid of a limited-duration punishment. Furthermore, we invoke an attractive practical adaptive Turbo Trellis Coded Modulation (ATTCM) scheme, which appropriately adjusts the code rate and the modulation mode according to the near-instantaneous channel conditions. It was found that the joint design of coding, modulation and user-cooperation may lead to significant mutual benefits for all the PUs and the CUs.
1188-1200
Liang, Wei
d2bdc110-48a3-41e9-90e7-4edd4e050cff
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Feng, Jiao
30326d06-a668-43f4-a41a-f2bf2ae65442
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liang, Wei
d2bdc110-48a3-41e9-90e7-4edd4e050cff
Ng, S.X.
e19a63b0-0f12-4591-ab5f-554820d5f78c
Feng, Jiao
30326d06-a668-43f4-a41a-f2bf2ae65442
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liang, Wei, Ng, S.X., Feng, Jiao and Hanzo, Lajos (2014) Pragmatic distributed algorithm for spectral access in cooperative cognitive radio networks. IEEE Transactions on Communications, 62 (4), 1188-1200.

Record type: Article

Abstract

A pragmatic distributed algorithm (PDA) is proposed for supporting the efficient spectral access of multiple Primary Users (PUs) and Cognitive Users (CUs) in cooperative Cognitive Radio (CR) networks. The novelty of our PDA is that the PUs negotiate with the CUs concerning the specific amount of relaying and transmission time, the CU is granted, which the CU will either accept or decline. The CUs may serve as relay nodes for relaying the signal received from the PUs to their destinations, while both the PUs' and the CUs' minimum rate requirements are satisfied. This will reduce the required transmission power and/or increase the transmission rate of the PU. Our results show that the proposed scheme performs better than the benchmarker, despite its significantly lower overhead and complexity. Moreover, we show that the cooperative spectral access based on our PDA reaches an equilibrium, when it is repeated for a sufficiently long duration. These benefits are achieved, because the PUs are motivated to cooperate by the incentive of achieving a higher PU rate, whilst non-cooperation can be discouraged with the aid of a limited-duration punishment. Furthermore, we invoke an attractive practical adaptive Turbo Trellis Coded Modulation (ATTCM) scheme, which appropriately adjusts the code rate and the modulation mode according to the near-instantaneous channel conditions. It was found that the joint design of coding, modulation and user-cooperation may lead to significant mutual benefits for all the PUs and the CUs.

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More information

e-pub ahead of print date: 18 March 2014
Published date: April 2014
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 362677
URI: https://eprints.soton.ac.uk/id/eprint/362677
PURE UUID: 97a52073-792c-4a4f-9c28-5609eaec779e
ORCID for S.X. Ng: ORCID iD orcid.org/0000-0002-0930-7194
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 04 Mar 2014 15:25
Last modified: 06 Jun 2018 13:15

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