A SideLink-assisted Joint Handover Scheme for Long Term Evolution -Vehicle to Everything System
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摘要:
在LTE-V2X系统中，针对车载用户切换过程中蜂窝链路及SideLink(SL)链路质量不高以及SL辅助切换过程中SL链路易中断的问题，该文提出一种基于SL的联合切换方案，主要包含：联合切换流程设计、联合切换信令流程设计以及联合切换判决算法设计。首先，在联合切换流程中利用SL技术实现联合切换，并对执行联合切换的SL链路质量进行筛选，以保证联合切换的可靠性；其次，对联合切换信令流程进行了完善，以优化SL辅助切换过程中SL链路易中断问题；最后，在联合切换判决算法中将车载用户的移动方向纳入切换判决条件，从而减少不必要的切换。仿真结果显示，该文所提方案能有效提升切换成功率，与此同时还能有效减少执行LTE切换的次数。
Abstract:For LTE-V2X(Long Term Evolution-Vehicle to Everything) system, the cellular link and the SideLink (SL) are usually unstable in the handover process, and the situation is even deteriorating when the SL is employed to assist the normal handover process. To solve these problems, an SL-assisted joint handover scheme is proposed for vehicles in the network, which mainly includes: joint handover procedure design, signaling design, and the joint handover decision algorithm. Firstly, the SL is established for the vehicles that are about to request for handover. The SL is set up between the pair of vehicles with the best channel quality to ensure the link reliability. Secondly, in order to tackle the perplexing problem of SL being vulnerable in the fast changing radio environment, the joint handover signaling procedure is optimized with respect to two different realistic circumstances. Finally, the vehicle’s moving direction is further included in making the handover decision, thus reducing unnecessary handover operations. Simulation results illustrate that the SL-assisted joint handover scheme can effectively ameliorate the handover success rate and reduce significantly the number of LTE handovers.
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LUOTO P, BENNIS M, PIRINEN P, et al. Vehicle clustering for improving enhanced LTE-V2X network performance[C]. 2017 European Conference on Networks and Communications, Oulu, Finland, 2017: 1–5. doi: 10.1109/EuCNC.2017.7980735. STRÖM E and SVENSSON T. EU FP7 INFSO-ICT-317669 METIS, D1.1: scenarios, requirements and KPIs for 5G mobile and wireless system[EB/OL]. https://research.chalmers.se/publication/213055, 2013. 卓文斌, 缪照浜, 高月红, 等. V2X技术发展历程及应用研究[J]. 电信工程技术与标准化, 2016, 29(2): 20–24. doi: 10.3969/j.ssn.1008-5599ZHUO Yibin, MIAO Zhaobang, GAO Yuehong, et al. Technology development and application research of V2X[J]. Telecom Enginnering Technics and Standardizatin, 2016, 29(2): 20–24. doi: 10.3969/j.ssn.1008-5599 Qualcomm. Study on LTE device to device proximity services[R]. 3GPP RP-12209, 2012. LIEN S Y, CHIEN C C, TSENG F M, et al. 3GPP device-to-device communications for beyond 4G cellular networks[J]. IEEE Communications Magazine, 2016, 54(3): 29–35. doi: 10.1109/MCOM.2016.7432168 CHAVVA A K R and SRIPADA K. Low-complexity LTE-D2D synchronization algorithms[C]. The 13th IEEE Annual Consumer Communications & Networking Conference, Las Vegas, USA, 2016: 156–163. doi: 10.1109/CCNC.2016.7444749. 3GPP. Evolved Universal Terrestrial Radio Access (E-UTRA); physical channels and modulation[R]. TS 36.211, 2017. ORSINO A, GAPEYENKO M, MILITANO L, et al. Assisted handover based on device-to-device communications in 3GPP LTE systems[C]. 2015 IEEE Globecom Workshops, San Diego, USA, 2015: 1–6. doi: 10.1109/GLOCOMW.2015.7414095. YILMAZ O N C, LI Zexian, VALKEALAHTI K, et al. Smart mobility management for D2D communications in 5G networks[C]. 2014 IEEE Wireless Communications and Networking Conference Workshops, Istanbul, Turkey, 2014: 219–223. doi: 10.1109/WCNCW.2014.6934889. YE Changlong, WANG Ping, WANG Chao, et al. Mobility management for LTE-based heterogeneous vehicular network in V2X scenario[C]. The 2nd IEEE International Conference on Computer and Communications, Chengdu, China, 2016: 2203–2207. doi: 10.1109/CompComm.2016.7925091 CHEN H Y, SHIH M J, and WEI H Y. Handover mechanism for device-to-device communication[C]. 2015 IEEE Conference on Standards for Communications and Networking, Tokyo, Japan, 2015: 72–77. doi: 10.1109/CSCN.2015.7390423. MANOLAKIS K and XU Wen. Sidelink-assisted handover for cellular network[C]. The 18th IEEE International Symposium on A World of Wireless, Mobile and Multimedia Networks, Macau, China, 2017: 1–5. doi: 10.1109/WoWMoM.2017.7974359. 王淡宜. 高速移动场景下蜂窝无线通信网络群切换策略研究[D]. [硕士论文], 西南交通大学, 2014.WANG Danyi. An investigation on group handover strategy of cellular wireless network under high mobility scenarios[D]. [Master dissertation], Southwest Jiaotong University, 2014. 马彬, 汪栋, 谢显中. 车辆异构网络中基于决策树的稳健垂直切换算法[J]. 电子与信息学报, 2017, 39(7): 1719–1726. doi: 10.11999/JEIT161182MA Bin, WANG Dong, and XIE Xianzhong. Robust vertical handoff algorithm based on decision tree in vehicle heterogeneous network[J]. Journal of Electronics &Information Technology, 2017, 39(7): 1719–1726. doi: 10.11999/JEIT161182 3GPP. Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); protocol specification[R]. TS 36.331, 2017. 栾林林. 支持高速切换的TD-LTE信令的设计及其优化的研究[D]. [博士论文], 北京邮电大学, 2013.LUAN Linlin. Research on designing and optimization of signalling of TD-LTE based on high-speed handover[D]. [Ph.D. dissertation], Beijing University of Posts and Telecommunications, 2013. 宁珍妮. 基于信号强度与车辆速度的切换判决算法[J]. 中国新通信, 2017, 19(4): 8–11. doi: 10.3969/j.issn.1673-4866.2017.04.007NING Zhenni. Handover decision algorithm based on signal strength and vehicle speed[J]. China New Telecommunications, 2017, 19(4): 8–11. doi: 10.3969/j.issn.1673-4866.2017.04.007 -
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