蜂窝车联网(Cellular Vehicle-to-everything,C-V2X)通信可以有效地提高交通效率,改善道路安全。但由于大规模的车辆连接和快速变化的无线信道使得V2X网络需要提供高能效和高可靠性的通信服务。为了实现V2X网络中的大规模连接,同时保证...蜂窝车联网(Cellular Vehicle-to-everything,C-V2X)通信可以有效地提高交通效率,改善道路安全。但由于大规模的车辆连接和快速变化的无线信道使得V2X网络需要提供高能效和高可靠性的通信服务。为了实现V2X网络中的大规模连接,同时保证基于蜂窝通信的车辆用户(Cell User Equipments,CUEs)的最小通信速率和基于D2D技术的车辆用户(Vehicle User Equipments,VUEs)的最小通信可靠性,提出了一个基于非正交多址接入(Non-Orthogonal Multiple-Access,NOMA)技术的高能效无线资源分配问题。为解决该混合整数非凸问题,首先将其分解为VUE分组问题、功率分配问题和子信道分配问题,然后分别提出了基于最大割算法、拉格朗日对偶法和匹配算法的解决方案。仿真结果表明,对比具有高计算复杂度的穷举搜索算法,所提功率分配算法能够以较低的计算复杂度获得接近最佳能效的性能。展开更多
In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we pro...In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we propose a novel random access(RA) and resource allocation scheme for the coexistence of NOMA-based and OMAbased machine-to-machine(M2M) communications,which aims at improving the number of successful data packet transmissions and guaranteeing the quality of service(Qo S) (e.g.,the minimum data rate requirement) for M2 M communications.The algorithm of joint user equipment(UE) paring and power allocation is proposed for the coexisting RA(i.e.,the coexistence of NOMA-based RA and OMA-based RA) .The resource allocation for the coexisting RA is investigated,thus improving the number of successful data packet transmissions by more efficiently using the radio resources.Simulation results demonstrate that the proposed RA and resource allocation scheme outperforms the conventional RA in terms of the number of successful data packet transmissions,thus is a promising technology in future M2 M communications.展开更多
文摘蜂窝车联网(Cellular Vehicle-to-everything,C-V2X)通信可以有效地提高交通效率,改善道路安全。但由于大规模的车辆连接和快速变化的无线信道使得V2X网络需要提供高能效和高可靠性的通信服务。为了实现V2X网络中的大规模连接,同时保证基于蜂窝通信的车辆用户(Cell User Equipments,CUEs)的最小通信速率和基于D2D技术的车辆用户(Vehicle User Equipments,VUEs)的最小通信可靠性,提出了一个基于非正交多址接入(Non-Orthogonal Multiple-Access,NOMA)技术的高能效无线资源分配问题。为解决该混合整数非凸问题,首先将其分解为VUE分组问题、功率分配问题和子信道分配问题,然后分别提出了基于最大割算法、拉格朗日对偶法和匹配算法的解决方案。仿真结果表明,对比具有高计算复杂度的穷举搜索算法,所提功率分配算法能够以较低的计算复杂度获得接近最佳能效的性能。
基金supported by the National Natural Science Foundation of China(61501056)National Science and Technology Major Project of China(No.2016ZX03001012)the Research Fund of ZTE Corporation
文摘In the future fifth generation(5G) systems,non-orthogonal multiple access(NOMA) is a promising technology that can greatly enhance the network capacity compared to orthogonal multiple access(OMA) .In this paper,we propose a novel random access(RA) and resource allocation scheme for the coexistence of NOMA-based and OMAbased machine-to-machine(M2M) communications,which aims at improving the number of successful data packet transmissions and guaranteeing the quality of service(Qo S) (e.g.,the minimum data rate requirement) for M2 M communications.The algorithm of joint user equipment(UE) paring and power allocation is proposed for the coexisting RA(i.e.,the coexistence of NOMA-based RA and OMA-based RA) .The resource allocation for the coexisting RA is investigated,thus improving the number of successful data packet transmissions by more efficiently using the radio resources.Simulation results demonstrate that the proposed RA and resource allocation scheme outperforms the conventional RA in terms of the number of successful data packet transmissions,thus is a promising technology in future M2 M communications.
