摘要
为提升FTTR场景下多接入点协同的系统容量,提出了一种基于集中式无线光接入网络(C-WAN)的下行协同传输方案。在中心控制器全局感知与统一调度下,结合EDCA机制与协同空间复用(C-SR),实现TDMA时隙分配与精细化功率控制,并将联合调度与功率分配以低复杂度方法近优求解。为评估方案性能,构建了符合该协同机制的MAC层模型。仿真结果显示,与RTS/CTS方案相比,所提方案在不同终端分布和部署密度下均显著提升了吞吐量,低干扰环境优势尤为突出;在高密度条件下虽时延增加,但容量优势依旧明显。
To enhance system capacity in FTTR scenarios with multi-AP coordination,a downlink cooperative transmission scheme based on a centralized wireless optical access network(C-WAN)was proposed.Under the global perception and unified scheduling of a central controller,the scheme integrated the EDCA mechanism with coordinated spatial reuse(C-SR)to achieve TDMA slot allocation and fine-grained power control.The joint scheduling and power allocation problem was solved near-optimally using a low-complexity method.To evaluate the scheme’s performance,a MAC-layer model consistent with the cooperative mechanism was constructed.Simulation results show that,compared with the RTS/CTS scheme,the proposed method significantly improves throughput across different terminal distributions and deployment densities,with particularly notable advantages in low-interference environments.Although delays increase under high-density conditions,the capacity advantage remains evident.
作者
曾宸
徐鹏举
刘奕晨
刘应状
ZENG Chen;XU Pengju;LIU Yichen;LIU Yingzhuang(School of Electronic Information and Communication,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《通信学报》
2025年第S1期34-46,共13页
Journal on Communications
基金
华为技术有限公司基金资助项目(No.TP20250612004)。
关键词
集中式无线光接入
协同空间复用
图模型
最大权重团
马尔可夫链
centralized wireless optical access
coordinated spatial reuse
graphical models
maximum weight clique
Markov chain
