基于下一代广播电视无线网(NGB-w)技术需求分析,文章给出了两种广播与双向通信融合的网络架构,讨论了下行广播传输、广播与通信融合数据推送、双向无线接入、频谱感知等方面涉及的关键技术,并探讨了NGB-W的应用前景.文章认为采用广播与双向通信融合网络,NGB-W系统可以充分利用超高频(UHF)频谱资源,根据各种信息业务的不同特点,有针对性地分配网络资源和频谱资源,选择最优传输方式,从而提高系统整体无线频谱利用率.%This paper proposes two network architectures in which broadcast and bidirectional communications are converged. These architectures are based on the next-generation broadcast wireless network (NGB-W). This paper discusses the application prospects of NGB-W and key technologies such as downlink broadcast transmission, data push of converged broadcast and communications, bidirectional wireless access, and spectrum sensing. It suggests that by using a converged broadcast and bidirectional communication network, the NGB-W system can make better use of ultrahigh frequency (UHF) spectrum resources, distribute network and spectrum resources more efficiently, choose suitable transmission schemes for various services, and improve efficiency in wireless spectrum use.
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