摘要
由于车车通信(V2V)在基于终端直通技术(D2D)实现时对可靠性和时延要求更加严格,D2D的无线资源分配需要重新设计,因此,对一种基于竞争的资源池资源分配方式进行讨论和改进。设计了一种在授权频段下的信道检测机制,通过对不同检测窗口的设计与分析,实现了车载终端(V-UE)通过信道检测,尽可能避免在选择资源池资源时发生资源碰撞导致信道质量下降。同时通过对时延要求不同的业务设定不同窗口,实现了对信道资源不同优先级的占用。通过系统级仿真,证明了该机制在提高信道质量的同时,能够实现对不同业务占用信道的时延差异。
Since the vehicle-to-vehicle(V2V)communication based on devi-to-device(D2D)communication technology has higher requirement for reliability and time delay,it is necessary to redesign the wireless resource allocation of D2D.A resource allocation mode based on competition is discussed and improved.A channel detection mechanism at authorized frequency band was designed.The different detection windows are designed and analyzed to realize the channel detection of vehicle-user equipment(V-UE),and avoid the channel quality reduction caused by resource collision when the resource is selected in resource pool.The different windows are set for the time delay requirement according to different services to occupy the channel resource with different priorities.The result of system-level simulation shows that the mechanism can realize the time delay diffe-rence for channel occupation in different services while improving the channel quality.
作者
张刚
胡恒
陈婉
ZHANG Gang;HU Heng;CHEN Wan(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)
出处
《现代电子技术》
北大核心
2018年第7期140-146,共7页
Modern Electronics Technique
关键词
V2V
资源分配
资源池
信道检测机制
资源碰撞
时延
V2V
resource allocation
resource pool
channel detection mechanism
resource collision
time delay
