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| 1 | 一种基于D2D的VANET中时延最小化的资源分配方案显示文摘在VANET(Vehicular Ad-hoc Network)中,现用于车辆和基础设施之间通信的标准化协议为IEEE 802. 11p,然而,由于其通信范围有限以及具有CSMA/CA(Carrier Sense Multiple Access with Collision Avoidance)机制,会产生SAC(Store-and-Catch-up)延迟和信道接入竞争延迟。文中通过引入D2D(Device-to-Device)技术,不仅消除了争用延迟,并且由于增大了通信范围,SAC延迟也相应减小。文中还提出了一种D2D频谱分配策略以降低时延,通过仿真验证,该方法不仅提高了频谱利用率,还很大程度降低了端到端通信时延。 | 赵银泽 江凌云 | 2018 | 南京邮电大学学报(自然科学版)2018，38，5： | 1 |
| 2 | A Caching Strategy Based on Many-to-Many Matching Game in D2D Networks显示文摘Wireless edge caching has been proposed to reduce data traffic congestion in backhaul links, and it is being envisioned as one of the key components of next-generation wireless networks. This paper focuses on the influences of different caching strategies in Device-to-Device(D2D) networks. We model the D2D User Equipments(DUEs) as the Gauss determinantal point process considering the repulsion between DUEs, as well as the caching replacement process as a many-to-many matching game. By analyzing existing caching placement strategies, a new caching strategy is proposed, which represents the preference list of DUEs as the ratio of content popularity to cached probability. There are two distinct features in the proposed caching strategy.(1) It can cache other contents besides high popularity contents.(2) It can improve the cache hit ratio and reduce the latency compared with three caching placement strategies: Least Recently Used(LRU), Equal Probability Random Cache(EPRC), and the Most Popular Content Cache(MPC). Meanwhile, we analyze the effect of caching on the system performance in terms of different content popularity factors and cache capacity. Simulation results show that our proposed caching strategy is superior to the three other comparison strategies and can significantly improve the cache hit ratio and reduce the latency. | Kaihang Yu Zhonggui Ma Runyu Ni Tao Zhang | 2021 | Tsinghua Science and Technology2021，26，6： | 1 |
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