基于QoS决策的异构VLC/WiFi网络联合收发端需求的接入点选择
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摘要
针对可见光通信(VLC)下行链路存在多接入点(AP)重叠覆盖、VLC AP光路易被遮挡和干扰的问题,提出了一种基于服务质量(QoS)决策的异构VLC/无线保真(WiFi)网络联合收发端需求的接入点选择算法。该算法在收端为用户建立面向QoS的加权信息矩阵,为用户偏好提供高信干噪比、高接收功率、低负载、低历史中断概率的VLC AP;在发端为VLC AP偏好选择抗干扰性强的用户服务。基于引力理论改进收发端选择权重值,优化用户的AP接入决策。仿真结果表明:该算法在方形均匀布局和混合圆方形布局中比现有算法的吞吐量分别增大了77.3%和11.4%,业务公平性分别减小了53.1%和41.1%。
Visible light communication(VLC) is prone to overlap coverage of the adjacent VLC access points(APs), receiver occlusion, and light path interference. This study develops an AP selection algorithm for heterogeneous VLC/wireless fidelity(WiFi) networks. By considering the joint demands of transmitting and receiving, the algorithm employs a quality-of-service(QoS)-based decision-making to satisfy the differentiated resource demands of the receiving end and the transmitting equipment. First, it designs a QoS-oriented weighted information matrix for each receiver and guides the user to select the VLC AP with high received signal-to-interference-and-noise ratio, high received power, low traffic load, and low historical interruption probability. Guided by the same algorithm, the selected VLC AP preferentially serves users with strong anti-interference. Finally, to optimize the AP access, we improve the weights of the APs and users based on gravitation theory. In simulations on a uniform square layout and a mixed circular-square layout, the proposed algorithm delivers 77.3% and 11.4% more throughput respectively than the existing algorithms, and reduces the service fairness index by 53.1% and 41.1%, respectively.
Visible light communication(VLC) is prone to overlap coverage of the adjacent VLC access points(APs), receiver occlusion, and light path interference. This study develops an AP selection algorithm for heterogeneous VLC/wireless fidelity(WiFi) networks. By considering the joint demands of transmitting and receiving, the algorithm employs a quality-of-service(QoS)-based decision-making to satisfy the differentiated resource demands of the receiving end and the transmitting equipment. First, it designs a QoS-oriented weighted information matrix for each receiver and guides the user to select the VLC AP with high received signal-to-interference-and-noise ratio, high received power, low traffic load, and low historical interruption probability. Guided by the same algorithm, the selected VLC AP preferentially serves users with strong anti-interference. Finally, to optimize the AP access, we improve the weights of the APs and users based on gravitation theory. In simulations on a uniform square layout and a mixed circular-square layout, the proposed algorithm delivers 77.3% and 11.4% more throughput respectively than the existing algorithms, and reduces the service fairness index by 53.1% and 41.1%, respectively.
引文
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[16] Zhao G Q,Xu Z Q,Ye Z L,et al.A load balancing algorithm based on key-link and resources contribution degree for virtual optical networks mapping[C]//International Conference on Computer,Information and Telecommunication Systems,July 21-23,2017,Dalian,China.New York:IEEE,2017:63-67.
[17] Dong J M,Zhang Y Y,Zhu Y J.Convex relaxation for illumination control of multi-color multiple-input-multiple-output visible light communications with linear minimum mean square error detection[J].Applied Optics,2017,56(23):6587-6595.
[18] Kazemi H,Haas H.Downlink cooperation with fractional frequency reuse in DCO-OFDMA optical attocell networks[C]//IEEE International Conference on Communications,May 22-27,2016,Kuala Lumpur,Malaysia.New York:IEEE,2016,978:1-6.
[19] Amanor D N,Edmonson W W,Afghah F.Link performance improvement via design variables optimization in LED-based VLC system for inter-satellite communication[C]//IEEE International Conference on Wireless for Space & Extreme Environments,October 10-12,2017,Montreal,QC,Canada.New York:IEEE,2017,978:7-12.
[20] Wang Z X,Yu C Y,Zhong W D,et al.Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems[J].Optics Express,2012,20(4):4564-4573.
[21] Chen Y,Shen Q X,Liu H L.Optimization algorithm of receiver optical power uniformity in indoor visible light communication[J].Chinese Journal of Lasers,2018,45(5):0506003.陈勇,沈奇翔,刘焕淋.室内可见光通信中接收光功率均匀性优化方法[J].中国激光.2018,45(5):0506003.
[22] Li X,Zhang R,Hanzo L.Cooperative load balancing in hybrid visible light communications and WiFi[J].IEEE Transactions on Communications,2015,63(4):1319-1329.
[2] Yin H H,Dong Y Q,Zou Q,et al.Design and implementation of a visible light communication system based on the mobile scenario[J].Journal of Chongqing University of Posts and Telecommunications (Natural Science Edition),2017,29(4):487-493.尹浩浩,董雨晴,邹倩,等.移动场景下一种可见光通信系统的设计与实现[J].重庆邮电大学学报(自然科学版),2017,29(4):487-493.
[3] Chi N,Lu X Y,Wang C,et al.High-speed visible light communication based on LED[J].Chinese Journal of Lasers,2017,44(3):0300001.迟楠,卢星宇,王灿,等.基于LED的高速可见光通信[J].中国激光,2017,44(3):0300001.
[4] Wang C X,Jian C X,Liu L K,et al.QoE-based handover scheme for indoor VLC-WiFi heterogeneous systems[J].Journal of Signal Processing,2017,33(9):1191-1198.王春喜,菅春晓,刘洛琨,等.基于用户体验的VLC/WiFi异构网络切换算法[J].信号处理,2017,33(9):1191-1198.
[5] Basnayaka D A,Haas H.Design and analysis of a hybrid radio frequency and visible light communication system[J].IEEE Transactions on Communications,2017,65(10):4334-4347.
[6] Hammouda M,Akin S,Vegni A M,et al.Link selection in hybrid RF/VLC systems under statistical queueing constraints[J].IEEE Transactions on Wireless Communications,2018,17(4):2738-2754.
[7] Wang J J.Hybrid communication method combining RF system and multiple VLC[J].Journal of China Academy of Electronics and Information Technology,2018,13(2):115-120.王俊珺.结合射频系统和多个VLC的混合通信方法[J].中国电子科学研究院学报,2018,13(2):115-120.
[8] Tan C H,Choong F C M,Teo Y C,et al.Power optimization in hybrid visible light communication for indoor applications[C]//2016 Progress in Electromagnetic Research Symposium (PIERS),August 8-11,2016,Shanghai,China.New York:IEEE,2016:3434-3437.
[9] Wu X P,Safari M,Haas H.Access point selection for hybrid Li-Fi and Wi-Fi networks[J].IEEE Transactions on Communications,2017,65(12):5375-5385.
[10] Zheng H T,Ji X S,Huang K Z,et al.Novel vertical handoff algorithm based on equivalent SINR between VLC and WiFi[J].Application Research of Computers,2016,33(3):832-835,839.郑浩天,季新生,黄开枝,等.基于等效SINR的VLC与WiFi垂直切换算法[J].计算机应用研究,2016,33(3):832-835,839.
[11] Roughan M.Simplifying the synthesis of internet traffic matrices[J].ACM SIGCOMM Computer Communication Review,2005,35(3):93-96.
[12] Zhang Y,Roughan M,Lund C,et al.Estimating point-to-point and point-to-multipoint traffic matrices:an information-theoretic approach[J].IEEE/ACM Transactions on Networking,2005,13(5):947-960.
[13] Wu Y S,Guo B,Shen Y,et al.A cross-layer optimization and design approach under QoS constraints for green IP over WDM networks[J].Computer Networks,2015,76:177-190.
[14] Tune P,Roughan M.Controlled synthesis of traffic matrices[J].IEEE/ACM Transactions on Networking,2017,25(3):1582-1592.
[15] Perovic B D,Tasic D S,Klimenta D O,et al.Optimising the thermal environment and the ampacity of underground power cables using the gravitational search algorithm[J].IET Generation,Transmission & Distribution,2018,12(2):423-430.
[16] Zhao G Q,Xu Z Q,Ye Z L,et al.A load balancing algorithm based on key-link and resources contribution degree for virtual optical networks mapping[C]//International Conference on Computer,Information and Telecommunication Systems,July 21-23,2017,Dalian,China.New York:IEEE,2017:63-67.
[17] Dong J M,Zhang Y Y,Zhu Y J.Convex relaxation for illumination control of multi-color multiple-input-multiple-output visible light communications with linear minimum mean square error detection[J].Applied Optics,2017,56(23):6587-6595.
[18] Kazemi H,Haas H.Downlink cooperation with fractional frequency reuse in DCO-OFDMA optical attocell networks[C]//IEEE International Conference on Communications,May 22-27,2016,Kuala Lumpur,Malaysia.New York:IEEE,2016,978:1-6.
[19] Amanor D N,Edmonson W W,Afghah F.Link performance improvement via design variables optimization in LED-based VLC system for inter-satellite communication[C]//IEEE International Conference on Wireless for Space & Extreme Environments,October 10-12,2017,Montreal,QC,Canada.New York:IEEE,2017,978:7-12.
[20] Wang Z X,Yu C Y,Zhong W D,et al.Performance of a novel LED lamp arrangement to reduce SNR fluctuation for multi-user visible light communication systems[J].Optics Express,2012,20(4):4564-4573.
[21] Chen Y,Shen Q X,Liu H L.Optimization algorithm of receiver optical power uniformity in indoor visible light communication[J].Chinese Journal of Lasers,2018,45(5):0506003.陈勇,沈奇翔,刘焕淋.室内可见光通信中接收光功率均匀性优化方法[J].中国激光.2018,45(5):0506003.
[22] Li X,Zhang R,Hanzo L.Cooperative load balancing in hybrid visible light communications and WiFi[J].IEEE Transactions on Communications,2015,63(4):1319-1329.
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