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新版WIFI有了新命名:WIFI 6

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新版WIFI有了新命名:WIFI 6
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Wi-Fi是现代人生活中必不可少的一个角色,现在去别人家做客人们一定会问一个问题:“你们家Wi-Fi密码是多少?”去年年底,Wi-Fi联盟宣布改变Wi-Fi的命名方式,复杂的命名方式已经不复存在,Wi-Fi 6(也就是原来的802.11.ax)将是下一代Wi-Fi标准的名称,从1999年使用至今的802.11a命名格式正式退出历史舞台。

WIFI命名

除了新的名字之外,Wi-Fi 6还带来了许多好处,并且不仅仅是简单的速度提升。Wi-Fi 6今年就将进入到人们的生活中,你的下一部手机或笔记本电脑就可能支持Wi-Fi 6,不妨先提前了解一下它。

Wi-Fi 6有多快?

简单的回答是:9.6 Gbps。作为对此,Wi-Fi 5的速度是3.5 Gbps,可见提升幅度还是不小的。

不过更现实的回答是:这个速度只是理论最大值,在现实生活中很难实现。即使可以实现,但估计你的网速也不达标。

但是,Wi-Fi 6的速度提升这一事实仍然很重要。因为9.6 Gbps的网速可能并非单一设备独享,可以分配给整个网络中的所有设备,这意味着每个设备的潜在速度会更快。

Wi-Fi 6最重要的不是速度提升

可以说,Wi-Fi 6的最重要改进是减少拥塞并允许更多设备连接到网络。Wi-Fi 6使用了名为MU-MIMO(多用户多入多出)的技术来实现这一点,该技术允许路由器同时与多个设备通信,而不是依次进行通信。目前,MU-MIMO允许路由器一次与四个设备通信,Wi-Fi 6将允许与多达8个设备通信。Wi-Fi 6还利用其他技术,如OFDMA(正交频分多址)和发射波束成形,两者的作用分别提高效率和网络容量。

总之,Wi-Fi 6允许路由器同时与更多的设备进行通信,还允许路由器将数据发送到同一广播中的多个设备。

所有这些技术的目的都是为了解决大量设备连接到网络导致的网络拥堵问题,解决这个问题对现代生活非常重要。有调查显示,当Wi-Fi 5刚问世时,美国家庭平均拥有大约五个Wi-Fi设备。现在,美国家庭平均拥有9个Wi-Fi设备,有公司预测这一数字将在几年内达到50个。

另外,Wi-Fi 6还会在有大量人群的地方提供更好的体验,Wi-Fi联盟特别提到了零售商,公寓楼,交通枢纽和体育场馆。

Wi-Fi 6还可以提高电池续航

Wi-Fi 6中的另一项新技术允许设备规划与路由器的通信,减少了保持天线通电以传输和搜索信号所需的时间,这就意味着减少电池消耗并改善电池续航表现。

这个技术名为Target Wake Time(目标唤醒时间),它允许路由器安排与设备的通信时间。但该技术并不是对所有设备都有帮助,例如你的笔记本电脑需要持续的互联网访问,因此不太可能过多地受益于此功能(或许进入睡眠状态时影响更大)。该技术对偶尔需要更新其状态的小型、低功耗设备更有益处,例如放置在家中监控煤气泄漏的传感器或智能家居等。

Wi-Fi 6也意味着更好的安全性

去年,Wi-Fi技术获得了十年来最大的一次安全更新,开始支持新的安全协议WPA3,WPA3使黑客更难以通过不断猜测的方式来破解密码,并且即使黑客设法获取密码,它也会使一些数据变得不那么有用。

目前的设备和路由器可以支持WPA3,但并非是强制性的。然而,Wi-Fi 6设备要想获得Wi-Fi联盟的认证,则必须使用WPA3,因此一旦认证计划启动,大多数Wi-Fi 6设备都会具有更强的安全性。

怎样才能使用Wi-Fi 6?

要想使用Wi-Fi 6,你必须购买新的设备。因为Wi-Fi技术更新依赖于新的硬件,而不仅仅是软件,因此你需要购买新手机、笔记本电脑等,当然还有支持Wi-Fi 6的路由器,才能使用新版本的Wi-Fi。

Wi-Fi 6何时到来?

支持Wi-Fi 6的设备目前还处于起步阶段,虽然现在已经可以购买支持Wi-Fi 6的路由器,但价格都十分昂贵。少数笔记本电脑也支持Wi-Fi 6,但显然还远没有达到普及的程度。

不过,今年高端旗舰智能手机将开始布局Wi-Fi 6。高通公司的旗舰处理器骁龙855已经支持Wi-Fi 6,不过搭载骁龙855并不保证手机就一定支持Wi-Fi 6,只是可能性会更大:例如三星的Galaxy S10就搭载了骁龙855,该机就支持Wi-Fi 6。

Wi-Fi联盟将于今年秋季推出其Wi-Fi 6认证计划,以保证Wi-Fi设备的兼容性。虽然设备并不是一定要通过该认证,但该认证的推出意味着行业已准备好迎接Wi-Fi 6的到来,估计明年会有更多的设备支持Wi-Fi 6。

你需要Wi-Fi 6吗?

升级到新的的Wi-Fi 6标准当然是一件好事,但显然并非所有人都需要。

如果你的网速还远没有达到千兆的话,那么Wi-Fi 6对你的意义可能不大。另外,即使在拥有大量联网设备的环境中,例如商场、办公室或公共建筑,要想充分利用Wi-Fi 6的优势,还必须保证网络上的所有设备都支持该标准。

如果你目前的路由器只支持Wi-Fi 4(802.11n)或更早的标准,不妨先将其升级到支持Wi-Fi 5,等Wi-Fi 6路由器降价时再做考虑可能是更好的选择。

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