Low-Latency Transmission and Caching of High Definition Map at a Crossroad

  • Yue GuEmail author
  • Jie Liu
  • Long Zhao
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 313)


High definition (HD) map attracts more and more attention of researchers and map operators in recent years and has become an indispensable part for autonomous or assistant driving. Different from existing navigation map, HD map has the features of high precision, large-volume data and real-time update. Therefore, the real-time HD map transmission to the vehicles becomes one main challenge in vehicular networks. This paper considers the scenario that a RSU at the crossroad caches and transmits HD maps to its covered vehicles in four directions. To reduce the average delay of HD map delivery, the transmission power allocation for vehicles and the cache allocation for HD maps of different road segments are optimized by leveraging the traffic density and vehicle positions. Simulation results indicate that the proposed scheme has lower latency than that of equal power allocation scheme based on real traffic data.


Vehicle networks High definition map Cache Delay 


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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2020

Authors and Affiliations

  1. 1.Wireless Signal Processing and Network (WSPN) Lab, Key Laboratory of Universal Wireless CommunicationMinistry of Education, Beijing University of Posts and Telecommunications (BUPT)BeijingChina

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