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基于SideLink的LTE-V2X聯合切換方案設計

申濱,  周曉勇,  徐浪,  黃曉舸

申濱, 周曉勇, 徐浪, 黃曉舸. 基于SideLink的LTE-V2X聯合切換方案設計[J]. 電子與信息學報, 2020, 42(2): 511-518. doi: 10.11999/JEIT190120
引用本文: 申濱, 周曉勇, 徐浪, 黃曉舸. 基于SideLink的LTE-V2X聯合切換方案設計[J]. 電子與信息學報, 2020, 42(2): 511-518. doi: 10.11999/JEIT190120
Bin SHEN, Xiaoyong ZHOU, Lang XU, Xiaoge HUANG. A SideLink-assisted Joint Handover Scheme for Long Term Evolution -Vehicle to Everything System[J]. Journal of Electronics & Information Technology, 2020, 42(2): 511-518. doi: 10.11999/JEIT190120
Citation: Bin SHEN, Xiaoyong ZHOU, Lang XU, Xiaoge HUANG. A SideLink-assisted Joint Handover Scheme for Long Term Evolution -Vehicle to Everything System[J]. Journal of Electronics & Information Technology, 2020, 42(2): 511-518. doi: 10.11999/JEIT190120

基于SideLink的LTE-V2X聯合切換方案設計

doi: 10.11999/JEIT190120

  • 重慶郵電大學通信與信息工程學院 重慶 400065

基金項目: 國家自然科學基金(61571073)
詳細信息
    作者簡介:

    申濱：男，1978年生，教授，研究方向為大規(guī)模MIMO系統(tǒng)、認知無線電等

    周曉勇：女，1994年生，碩士生，研究方向為LTE-V2X關鍵技術研究

    徐浪：男，1993年生，碩士生，研究方向為異構網絡融合

    黃曉舸：女，1982年生，副教授，主要研究方向為無線通信、移動通信系統(tǒng)5G前沿技術

    通訊作者:

    申濱　shenbin@cqupt.edu.cn

  • 中圖分類號: TN929.5

A SideLink-assisted Joint Handover Scheme for Long Term Evolution -Vehicle to Everything System

  • School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Nature Science Foundation of China (61571073)
  • 摘要:

    在LTE-V2X系統(tǒng)中，針對車載用戶切換過程中蜂窩鏈路及SideLink(SL)鏈路質量不高以及SL輔助切換過程中SL鏈路易中斷的問題，該文提出一種基于SL的聯合切換方案，主要包含：聯合切換流程設計、聯合切換信令流程設計以及聯合切換判決算法設計。首先，在聯合切換流程中利用SL技術實現聯合切換，并對執(zhí)行聯合切換的SL鏈路質量進行篩選，以保證聯合切換的可靠性；其次，對聯合切換信令流程進行了完善，以優(yōu)化SL輔助切換過程中SL鏈路易中斷問題；最后，在聯合切換判決算法中將車載用戶的移動方向納入切換判決條件，從而減少不必要的切換。仿真結果顯示，該文所提方案能有效提升切換成功率，與此同時還能有效減少執(zhí)行LTE切換的次數。

    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.

    • HTML全文

  • 圖  1  SL與蜂窩鏈接相互干擾場景

    圖  2  SL輔助切換場景

    圖  3  車載用戶移動模型

    圖  4  第1類信令流程

    圖  5  第2類信令流程

    圖  6  仿真場景

    圖  7  切換成功率

    圖  8  SL聯合切換方案之切換成功率

    圖  9  執(zhí)行LTE切換次數(500車載用戶場景)

    圖  10  執(zhí)行LTE切換次數(100車載用戶場景)

    圖  11  RLF性能

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出版歷程
  • 收稿日期:  2019-02-27
  • 修回日期:  2019-12-08
  • 網絡出版日期:  2019-12-10
  • 刊出日期:  2020-02-19

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