The effects of real-time traffic information system(RTTIS)on traffic performance under parallel,grid and ring networks were investigated.The simulation results show that the effects of the proportion of RTTIS usage de...The effects of real-time traffic information system(RTTIS)on traffic performance under parallel,grid and ring networks were investigated.The simulation results show that the effects of the proportion of RTTIS usage depend on the road network structures.For traffic on a parallel network,the performance of groups with and without RTTIS level is improved when the proportion of vehicles using RTTIS is greater than 0 and less than 30%,and a proportion of RTTIS usage higher than 90%would actually deteriorate the performance.For both grid and ring networks,a higher proportion of RTTIS usage always improves the performance of groups with and without RTTIS.For all three network structures,vehicles without RTTIS benefit from some proportion of RTTIS usage in a system.展开更多
随着不限流量套餐的推广和4G用户的增长,大话务场景下上行同频干扰问题日益突出.提出一种上行干扰抑制方法,用于大话务场景下上行信道干扰优化.一方面打破PUCCH在频域位置固定的传统观念,兼顾每RB和邻区PUCCH的干扰程度,通过“MRO数据+...随着不限流量套餐的推广和4G用户的增长,大话务场景下上行同频干扰问题日益突出.提出一种上行干扰抑制方法,用于大话务场景下上行信道干扰优化.一方面打破PUCCH在频域位置固定的传统观念,兼顾每RB和邻区PUCCH的干扰程度,通过“MRO数据+遗传算法”规划PUCCH位置,实现PUCCH频率位置灵活配置,最大程度降低PUCCH的干扰.另一方面,通过PCI mod 3的PUSCH RB起始位置分配方案,使相邻的不同小区的上行频率起始分配位置错开,降低用户间的同频干扰问题.该方案在不新增资源的前提下,优化了PUCCH和PUSCH的干扰,提升了用户的感知,具有较高的推广价值.展开更多
文摘The effects of real-time traffic information system(RTTIS)on traffic performance under parallel,grid and ring networks were investigated.The simulation results show that the effects of the proportion of RTTIS usage depend on the road network structures.For traffic on a parallel network,the performance of groups with and without RTTIS level is improved when the proportion of vehicles using RTTIS is greater than 0 and less than 30%,and a proportion of RTTIS usage higher than 90%would actually deteriorate the performance.For both grid and ring networks,a higher proportion of RTTIS usage always improves the performance of groups with and without RTTIS.For all three network structures,vehicles without RTTIS benefit from some proportion of RTTIS usage in a system.
文摘随着不限流量套餐的推广和4G用户的增长,大话务场景下上行同频干扰问题日益突出.提出一种上行干扰抑制方法,用于大话务场景下上行信道干扰优化.一方面打破PUCCH在频域位置固定的传统观念,兼顾每RB和邻区PUCCH的干扰程度,通过“MRO数据+遗传算法”规划PUCCH位置,实现PUCCH频率位置灵活配置,最大程度降低PUCCH的干扰.另一方面,通过PCI mod 3的PUSCH RB起始位置分配方案,使相邻的不同小区的上行频率起始分配位置错开,降低用户间的同频干扰问题.该方案在不新增资源的前提下,优化了PUCCH和PUSCH的干扰,提升了用户的感知,具有较高的推广价值.
