Control and data signaling decoupled architecture for railway wireless networks
Control and data signaling decoupled architecture for railway wireless networks
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DOI：
10.1109/mwc.2015.7054725
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发表时间：
2015-02
影响因子：
12.9
通讯作者：
Li Yan;X. Fang;Yuguang Fang
中科院分区：
文献类型：
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作者：
Li Yan;X. Fang;Yuguang Fang
目前铁路系统窄带全球移动通信系统的实施在满足客运服务新出现的大规模容量需求方面面临着巨大的挑战。为了扩展容量，本文提出了一种控制和数据信令解耦的架构，即铁路无线网络的C/U平面解耦架构，其中相对重要的客运业务的C平面保持在高质量的较低频段上以处理移动性，而相应的U平面则移动到较高的频段以获得更宽的频谱。在这种C/U面解耦合架构的铁路无线网络中，U面和C面切换也在物理上解耦。为了实现无缝软U面切换，提出了一种基于多点协调收发和双播的切换方案。此外，还重新设计了通道映射和物理层帧，以便于设计。我们的研究表明，通过解耦C/U平面，网络性能大大提高，从而为铁路系统提供了一种更有效的高速通信方式。
Current implementations of narrowband Global System for Mobile Communications for railway systems are facing significant challenges in meeting the emerging massive capacity demands of passenger services. To extend the capacity, this article presents a control and data signaling decoupled architecture, namely, C/U-plane decoupled architecture for railway wireless networks, in which the relatively important C-plane of passenger services is kept on high-quality lower frequency bands to handle mobility, while the corresponding U-plane is moved to higher frequency bands to gain broader spectra. In this railway wireless network with C/U-plane decoupled architecture, the U-plane and C-plane handovers are also physically decoupled. To achieve the seamless and soft U-plane handover, we introduce a handover scheme based on coordinated multi-point transmission and reception and bi-casting. In addition, channel mappings and physical layer frames are redesigned to facilitate the design. Our study has demonstrated that by decoupling the C/U planes, the network performance is greatly enhanced, leading to a more effective way to provide high speed communications for railway systems.