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基于Wi-Fi的固定无线接入方案

由  ON Semiconductor 发布  - 04-07-2020 

Wi-Fi最近庆祝诞生20周年。现代数字生活方式非常依赖Wi-Fi,很难想象在它诞生之前或没有它时的生活会是怎样。Wi-Fi的使用遍布生活的各个方面,如工作、与朋友和家人联系、做家庭作业、串流媒体节目等等。到2022年,将有48亿互联网用户和285亿联接的设备。据思科的可视化网络指数(VNI)预测,每位用户有5.9台设备。我们每天使用所有联接的设备和服务,因此对更高速宽带服务的需求猛增。

根据美国联邦通信委员会(FCC)的 2019年宽带部署报告》,美国城市地区98.3%的人拥有至少25 Mbps(下载速度)/ 3 Mbps(上传速度)服务的联接。但是,这是FCC截至2017年底的当前速度基准。大多数互联网运营商通常将此速度视为基本套餐。视频和数据密集型应用仍然是当今家庭的巨大需求,因为到2022年,全球互联网视频总流量预计将增长到所有互联网流量的82%。这增长将推动对超越基本速度的更高宽带服务的需求不断增长。此外,美国农村地区仍有26%的人不在速度基准测试的覆盖范围。考虑到国家的规模以及传统光纤网络部署的成本和复杂性,在美国提供高速互联网一直是个挑战。固定无线接入(FWA)最近在运营商中获得了发展势头,这是在城市和农村地区提供高速宽带服务以及缩小数字鸿沟的一种方法。

使用无线技术的FWA可以提供类似光纤的宽带接入,以尽可能扩大客户所在地的覆盖范围。 FWA基站经由毫米波和/或免授权的无线介质将数据传输到接收器单元,这些接收器单元安装在建筑物屋顶或单户住宅中。然后,数据从接收器传输到家庭内部的路由器。 FWA是一种理想的方案,将宽带联接带到城市和农村地区,并提供适合该地区的不同级别的宽带服务,而省去固定线路安装的麻烦和成本。

基于Wi-Fi的方案已用于FWA,使用大众市场芯片组。安森美半导体的QSR10G-AX(Wi-Fi 6)和QSR10G(Wi-Fi 5)方案支持高达10Gbps的速度、8x8多输入和多输出(MIMO)和先进的多用户MIMO,从而提供最大的容量,在密集环境中表现极佳。使用新的Wi-Fi 6增强功能,例如正交频分多址(OFDMA)、160MHz信道和1024-正交调幅(QAM),可以实现更大的网络容量和更好的性能。

为了满足消费者对跨区域更高带宽的不断增长的需求,基于Wi-Fi的FWA已成为对运营商极具吸引力的选择,提供升级或完善现有固定线路基础设施的增值服务以扩展其宽带网络。基于Wi-Fi的方案更灵活且成本经优化,因为FWA基站和家庭网关可采用相同的Wi-Fi芯片组类型。 OEM可以节省对用于这两种产品的通用Wi-Fi平台的研发投资。类似光纤的能力可以使用毫米波频段和/或免授权频段来解决密集的城市市场和农村地区的需求。在Wi-Fi 6技术进步和市场规模的浪潮下,FWA网络可以提供显著的性价比优势和上市时间。在无服务或服务不足地区的最终消费者将能够以更合理的价格获得更快的互联网速度,以在家中享受串流高清视频、在线游戏和其他互联网服务。

马上了解有关安森美半导体Wi-Fi方案的更多信息,以及这些方案可如何满足您的设计需求。

标签:Networking and Telecommunications, Portable and Wireless, Internet of Things, IoT
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