Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network
The secure communication that multiple OFDMA-based cell-edge mobile stations (MS) can only transmit confidential messages to base station (BS) through an untrusted intermediate relay (UR) is discussed. Specifically, with the destination-based jamming (DBJ) scheme and fixed MS transmission power assu...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2015/530632 |
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| author | Weiheng Jiang Wenjiang Feng |
| author_facet | Weiheng Jiang Wenjiang Feng |
| author_sort | Weiheng Jiang |
| collection | DOAJ |
| description | The secure communication that multiple OFDMA-based cell-edge mobile stations (MS) can only transmit confidential messages to base station (BS) through an untrusted intermediate relay (UR) is discussed. Specifically, with the destination-based jamming (DBJ) scheme and fixed MS transmission power assumption, our focus is on the joint BS and US power allocation to maximize system sum secrecy rate. We
first analyze the challenges in solving this problem. The result indicates that our nonconvex joint power allocation is equivalent to a joint MS access control and power allocation. Then, by problem relaxation and the alternating optimization approach, two suboptimal joint MS access control and power allocation algorithms are proposed. These algorithms alternatively solve the subproblem of joint BS and UR power allocation and the subproblem of MS selection until system sum secrecy rate is nonincreasing. In addition, the convergence and computational complexity of the proposed algorithms are analyzed. Finally, simulations results are presented to demonstrate the performance of our proposed algorithms. |
| format | Article |
| id | doaj-art-531bf3724370409598084869ab774c77 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-531bf3724370409598084869ab774c772025-02-03T06:44:41ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772015-01-01201510.1155/2015/530632530632Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA NetworkWeiheng Jiang0Wenjiang Feng1College of Communication Engineering, Chongqing University, Chongqing 400044, ChinaCollege of Communication Engineering, Chongqing University, Chongqing 400044, ChinaThe secure communication that multiple OFDMA-based cell-edge mobile stations (MS) can only transmit confidential messages to base station (BS) through an untrusted intermediate relay (UR) is discussed. Specifically, with the destination-based jamming (DBJ) scheme and fixed MS transmission power assumption, our focus is on the joint BS and US power allocation to maximize system sum secrecy rate. We first analyze the challenges in solving this problem. The result indicates that our nonconvex joint power allocation is equivalent to a joint MS access control and power allocation. Then, by problem relaxation and the alternating optimization approach, two suboptimal joint MS access control and power allocation algorithms are proposed. These algorithms alternatively solve the subproblem of joint BS and UR power allocation and the subproblem of MS selection until system sum secrecy rate is nonincreasing. In addition, the convergence and computational complexity of the proposed algorithms are analyzed. Finally, simulations results are presented to demonstrate the performance of our proposed algorithms.http://dx.doi.org/10.1155/2015/530632 |
| spellingShingle | Weiheng Jiang Wenjiang Feng Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network International Journal of Antennas and Propagation |
| title | Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network |
| title_full | Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network |
| title_fullStr | Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network |
| title_full_unstemmed | Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network |
| title_short | Joint Power Allocation at the Base Station and the Relay for Untrusted Relay Cooperation OFDMA Network |
| title_sort | joint power allocation at the base station and the relay for untrusted relay cooperation ofdma network |
| url | http://dx.doi.org/10.1155/2015/530632 |
| work_keys_str_mv | AT weihengjiang jointpowerallocationatthebasestationandtherelayforuntrustedrelaycooperationofdmanetwork AT wenjiangfeng jointpowerallocationatthebasestationandtherelayforuntrustedrelaycooperationofdmanetwork |