Secrecy outage and diversity analysis of multiple cooperating source-destination pairs

We study the physical-layer security of multiple source-destination (SD) pairs communicating within a wireless network in the face of an eavesdropper attacking the SD pairs. In order to protect the wireless transmission against eavesdropping, we propose a cooperation framework relying on two stages. Specifically, an SD pair is selected to access the total allocated spectrum using an appropriately designed scheme at the beginning of the first stage. The other source nodes (SNs) simultaneously transmit their data to the SN of the above-mentioned SD pair relying on orthogonal resources during the first stage. Then, the SN of the chosen SD pair transmits the data packets containing its own messages and the other SNs' messages to its dedicated destination node (DN) in the second stage. Finally, this dedicated DN will forward all the other DNs' data to the application center via the core network. We conceive a specific SD pair selection scheme, termed as the transmit antenna selection aided source-destination pair selection (TAS-SDPS). We continue by deriving the secrecy outage probability (SOP) expressions of both the TAS-SDPS conceived, as well as of the conventional round-robin source-destination pair selection (RSDPS) and of the conventional non-cooperative (Non-coop) schemes for comparison. Furthermore, we carry out the secrecy diversity gain analysis in the high main-to-eavesdropper ratio (MER) region, showing that the TAS-SDPS scheme is capable of achieving the maximum attainable secrecy diversity order. Additionally, we show that increasing the number of transmitting pairs will reduce the SOP, whilst increasing the secrecy diversity order of the TAS-SDPS scheme. It is demonstrated that the SOP of the TAS-SDPS scheme is better than that of the RSDPS and of the conventional Non-coop schemes. We also demonstrate that the secrecy diversity gain of the proposed TAS-SDPS scheme is M times that of the RSDPS scheme in the high-MER region, where M is the number of the SD pairs.

Physical-layer security, secrecy diversity gain, secrecy outage probability, source-destination pair selection

10.1109/TVT.2020.2986193

0018-9545

7648-7662

DIng, Xiaojin

a863d8a9-f1b7-46b9-aa10-a4a2892b68c9

Zou, Yulong

0359c94b-b989-448a-8164-da4047c4823f

Chen, Xiaoshu

cf4525ee-7e09-4834-8018-4b86db23bbd2

Wang, Xiaojun

a206a118-306d-4934-a9e9-176cefaffd98

Hanzo, Lajos

66e7266f-3066-4fc0-8391-e000acce71a1

1 July 2020

DIng, Xiaojin

a863d8a9-f1b7-46b9-aa10-a4a2892b68c9

Zou, Yulong

0359c94b-b989-448a-8164-da4047c4823f

Chen, Xiaoshu

cf4525ee-7e09-4834-8018-4b86db23bbd2

Wang, Xiaojun

a206a118-306d-4934-a9e9-176cefaffd98

Hanzo, Lajos

66e7266f-3066-4fc0-8391-e000acce71a1

DIng, Xiaojin, Zou, Yulong, Chen, Xiaoshu, Wang, Xiaojun and Hanzo, Lajos (2020) Secrecy outage and diversity analysis of multiple cooperating source-destination pairs. IEEE Transactions on Vehicular Technology, 69 (7), 7648-7662, [9072402]. (doi:10.1109/TVT.2020.2986193).

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VT-2019-02257 - Accepted Manuscript

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Accepted/In Press date: 2 April 2020

e-pub ahead of print date: 20 April 2020

Published date: 1 July 2020

Additional Information: Funding Information: Manuscript received August 5, 2019; revised October 15, 2019; accepted April 2, 2020. Date of publication April 20, 2020; date of current version July 16, 2020. This work was supported in part by the National Science Foundation of China under Grants 91738201, 61701255, and 61772287, in part by the Jiangsu Province Basic Research under Grant BK20192002, in part by the Key University Science Research Project of Jiangsu Province under Grant 18KJA510004, in part by the China Postdoctoral Science Foundation under Grant 2018M632347, in part by the Natural Science Research of Higher Education Institutions of Jiangsu Province under Grant 18KJB510030, and in part by the Open Research Fund of Jiangsu Engineering Research Center of Communication and Network Technology, NJUPT. L. Hanzo acknowledges the financial support of the Engineering and Physical Sciences Research Council projects EP/N004558/1, EP/P034284/1, EP/P034284/1, EP/P003990/1 (COALESCE), of the Royal Society’s Global Challenges Research Fund Grant as well as of the European Research Council’s Advanced Fellow Grant QuantCom. The review of this article was coordinated by Dr. M. Elkashlan. (Corresponding authors: Yulong Zou; Lajos Hanzo.) Xiaojin Ding is with the Jiangsu Engineering Research Center of Communication and Network Technology, Nanjing University of Posts and Telecommunications, Nanjing 210003, China (e-mail: dxj@njupt.edu.cn). Publisher Copyright: © 2020 IEEE

Keywords: Physical-layer security, secrecy diversity gain, secrecy outage probability, source-destination pair selection