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TSL:20190604 5G will augment Wi-Fi, not replace it.md
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[#]: collector: (lujun9972)
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[#]: translator: (GraveAccent)
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[#]: reviewer: ( )
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[#]: subject: (5G will augment Wi-Fi, not replace it)
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[#]: via: (https://www.networkworld.com/article/3399978/5g-will-augment-wi-fi-not-replace-it.html)
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[#]: author: (Zeus Kerravala https://www.networkworld.com/author/Zeus-Kerravala/)
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5G will augment Wi-Fi, not replace it
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======
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Jeff Lipton, vice president of strategy and corporate development at Aruba, adds a dose of reality to the 5G hype, discussing how it and Wi-Fi will work together and how to maximize the value of both.
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![Thinkstock][1]
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There’s arguably no technology topic that’s currently hotter than [5G][2]. It was a major theme of the most recent [Mobile World Congress][3] show and has reared its head in other events such as Enterprise Connect and almost every vendor event I attend.
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Some vendors have positioned 5G as a panacea to all network problems and predict it will eradicate all other forms of networking. Views like that are obviously extreme, but I do believe that 5G will have an impact on the networking industry and is something that network engineers should be aware of.
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To help bring some realism to the 5G hype, I recently interviewed Jeff Lipton, vice president of strategy and corporate development at Aruba, a Hewlett Packard company, as I know HPE has been deeply involved in the evolution of both 5G and Wi-Fi.
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**[ Also read:[The time of 5G is almost here][3] ]**
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### Zeus Kerravala: 5G is being touted as the "next big thing." Do you see it that way?
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**Jeff Lipton:** The next big thing is connecting "things" and generating actionable insights and context from those things. 5G is one of the technologies that serve this trend. Wi-Fi 6 is another — so are edge compute, Bluetooth Low Energy (BLE), artificial intelligence (AI) and machine learning (ML). These all are important, and they each have a place.
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### Do you see 5G eclipsing Wi-Fi in the enterprise?
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![Jeff Lipton, VP of strategy and corporate development, Aruba][4]
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**Lipton:** No. 5G, like all cellular access, is appropriate if you need macro area coverage and high-speed handoffs. But it’s not ideal for most enterprise applications, where you generally don’t need these capabilities. From a performance standpoint, [Wi-Fi 6][5] and 5G are roughly equal on most metrics, including throughput, latency, reliability, and connection density. Where they aren’t close is economics, where Wi-Fi is far better. I don’t think many customers would be willing to trade Wi-Fi for 5G unless they need macro coverage or high-speed handoffs.
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### Can Wi-Fi and 5G coexist? How would an enterprise use 5G and Wi-Fi together?
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**Lipton:** Wi-Fi and 5G can and should be complementary. The 5G architecture decouples the cellular core and Radio Access Network (RAN). Consequently, Wi-Fi can be the enterprise radio front end and connect tightly with a 5G core. Since the economics of Wi-Fi — especially Wi-Fi 6 — are favorable and performance is extremely good, we envision many service providers using Wi-Fi as the radio front end for their 5G systems where it makes sense, as an alternative to Distributed Antenna (DAS) and small-cell systems.
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Wi-Fi and 5G can and should be complementary." — Jeff Lipton
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### If a business were considering moving to 5G only, how would this be done and how practical is it?
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**Lipton:** To use 5G for primary in-building access, a customer would need to upgrade their network and virtually all of their devices. 5G provides good coverage outdoors, but cellular signals can’t reliably penetrate buildings. And this problem will become worse with 5G, which partially relies on higher frequency radios. So service providers will need a way to provide indoor coverage. To provide this coverage, they propose deploying DAS or small-cell systems — paid for by the end customer. The customers would then connect their devices directly to these cellular systems and pay a service component for each device.
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**[[Take this mobile device management course from PluralSight and learn how to secure devices in your company without degrading the user experience.][6] ]**
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There are several problems with this approach. First, DAS and small-cell systems are significantly more expensive than Wi-Fi networks. And the cost doesn’t stop with the network. Every device would need to have a 5G cellular modem, which costs tens of dollars wholesale and usually over a hundred dollars to an end user. Since few, if any MacBooks, PCs, printers or AppleTVs today have 5G modems, these devices would need to be upgraded. I don’t believe many enterprises would be willing to pay this additional cost and upgrade most of their equipment for an unclear benefit.
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### Are economics a factor in the 5G versus Wi-Fi debate?
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**Lipton:** Economics is always a factor. Let’s focus the conversation on in-building enterprise applications, since this is the use case some carriers intend to target with 5G. We’ve already mentioned that upgrading to 5G would require enterprises to deploy expensive DAS or small-cell systems for in-building coverage, upgrade virtually all of their equipment to contain 5G modems, and pay service contracts for each of these devices. It’s also important to understand 5G cellular networks and DAS systems operate over licensed spectrum, which is analogous to a private highway. Service providers paid billions of dollars for this spectrum, and this expense needs to be monetized and embedded in service costs. So, from both deployment and lifecycle perspectives, Wi-Fi economics are favorable to 5G.
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### Are there any security implications of 5G versus Wi-Fi?
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**Lipton:** Cellular technologies are perceived by some to be more secure than Wi-Fi, but that’s not true. LTE is relatively secure, but it also has weak points. For example, LTE is vulnerable to a range of attacks, including data interception and device tracking, according to researchers at Purdue and the University of Iowa. 5G improves upon LTE security with multiple authentication methods and better key management.
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Wi-Fi security isn’t standing still either and continues to advance. Of course, Wi-Fi implementations that do not follow best practices, such as those without even basic password protection, are not optimal. But those configured with proper access controls and passwords are highly secure. With new standards — specifically, WPA3 and Enhanced Open — Wi-Fi network security has improved even further.
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It’s also important to keep in mind that enterprises have made enormous investments in security and compliance solutions tailored to their specific needs. With cellular networks, including 5G, enterprises lose the ability to deploy their chosen security and compliance solutions, as well as most visibility into traffic flows. While future versions of 5G will offer high-levels of customization with a feature called network slicing, enterprises would still lose the level of security and compliance customization they currently need and have.
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### Any parting thoughts to add to the discussion around 5G versus Wi-Fi?
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**Lipton:** The debate around Wi-Fi versus 5G misses the point. They each have their place, and they are in many ways complementary. The Wi-Fi and 5G markets both will grow, driven by the need to connect and analyze a growing number of things. If a customer needs macro coverage or high-speed handoffs and can pay the additional cost for these capabilities, 5G makes sense.
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5G also could be a fit for certain industrial use cases where customers require physical network segmentation. But for the vast majority of enterprise customers, Wi-Fi will continue to prove its value as a reliable, secure, and cost-effective wireless access technology, as it does today.
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**More about 802.11ax (Wi-Fi 6):**
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* [Why 802.11ax is the next big thing in wireless][7]
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* [FAQ: 802.11ax Wi-Fi][8]
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* [Wi-Fi 6 (802.11ax) is coming to a router near you][9]
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* [Wi-Fi 6 with OFDMA opens a world of new wireless possibilities][10]
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* [802.11ax preview: Access points and routers that support Wi-Fi 6 are on tap][11]
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Join the Network World communities on [Facebook][12] and [LinkedIn][13] to comment on topics that are top of mind.
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--------------------------------------------------------------------------------
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via: https://www.networkworld.com/article/3399978/5g-will-augment-wi-fi-not-replace-it.html
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作者：[Zeus Kerravala][a]
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选题：[lujun9972][b]
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.networkworld.com/author/Zeus-Kerravala/
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[b]: https://github.com/lujun9972
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[1]: https://images.idgesg.net/images/article/2019/05/wireless_connection_speed_connectivity_bars_cell_tower_5g_by_thinkstock-100796921-large.jpg
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[2]: https://www.networkworld.com/article/3203489/what-is-5g-how-is-it-better-than-4g.html
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[3]: https://www.networkworld.com/article/3354477/mobile-world-congress-the-time-of-5g-is-almost-here.html
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[4]: https://images.idgesg.net/images/article/2019/06/headshot_jlipton_aruba-100798360-small.jpg
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[5]: https://www.networkworld.com/article/3215907/why-80211ax-is-the-next-big-thing-in-wi-fi.html
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[6]: https://pluralsight.pxf.io/c/321564/424552/7490?u=https%3A%2F%2Fwww.pluralsight.com%2Fcourses%2Fmobile-device-management-big-picture
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[7]: https://www.networkworld.com/article/3215907/mobile-wireless/why-80211ax-is-the-next-big-thing-in-wi-fi.html
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[8]: https://%20https//www.networkworld.com/article/3048196/mobile-wireless/faq-802-11ax-wi-fi.html
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[9]: https://www.networkworld.com/article/3311921/mobile-wireless/wi-fi-6-is-coming-to-a-router-near-you.html
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[10]: https://www.networkworld.com/article/3332018/wi-fi/wi-fi-6-with-ofdma-opens-a-world-of-new-wireless-possibilities.html
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[11]: https://www.networkworld.com/article/3309439/mobile-wireless/80211ax-preview-access-points-and-routers-that-support-the-wi-fi-6-protocol-on-tap.html
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[12]: https://www.facebook.com/NetworkWorld/
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[13]: https://www.linkedin.com/company/network-world
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@ -0,0 +1,103 @@
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[#]: collector: (lujun9972)
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[#]: translator: (GraveAccent)
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[#]: reviewer: ( )
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[#]: publisher: ( )
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[#]: url: ( )
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[#]: subject: (5G will augment Wi-Fi, not replace it)
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[#]: via: (https://www.networkworld.com/article/3399978/5g-will-augment-wi-fi-not-replace-it.html)
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[#]: author: (Zeus Kerravala https://www.networkworld.com/author/Zeus-Kerravala/)
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5G 会增强 Wi-Fi，而不是取代它
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======
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Aruba 战略和企业发展副总裁 Jeff Lipton 为 5G 炒作增添了一些干货，讨论了它和 Wi-Fi 如何协同工作以及如何最大化两者的价值。
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![Thinkstock][1]
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可以说没有技术主题比 [5G][2] 更热。 这是最近 [移动世界大会][3] 节目的一个主题，并且已经在其他活动中占据了主导地位，例如 Enterprise Connect 和我参加的几乎所有供应商活动。
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一些供应商将 5G 定位为解决所有网络问题的灵丹妙药，并预测它将消除所有其他形式的网络。 像这样的观点显然是极端的，但我相信 5G 会对网络行业产生影响，网络工程师应该意识到这一点。
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为了帮助为5G炒作带来一些现实感，我最近采访了一家惠普公司 Aruba 的战略和企业发展副总裁 Jeff Lipton，因为我知道惠普已经深入参与了 5G 和 Wi-Fi 的发展。
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**[ 另见：[5G 时代几乎已经来了][3] ]**
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### Zeus Kerravala: 5G 被吹捧为“下一件大事”。你是这样看的吗？
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**Jeff Lipton:** 接下来的重点是连接“事物”并从这些事物中产生可操作的见解和背景。5G 是服务于这一趋势的技术之一。Wi-Fi 6 是另一个，还有边缘计算，蓝牙低功耗（BLE），人工智能（AI）和机器学习（ML）。这一切都很重要，全都有自己的用武之地。
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### 你是否在企业中看到 5G 的风头盖过 Wi-Fi？
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![Jeff Lipton, VP of strategy and corporate development, Aruba][4]
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**Lipton:** 与所有蜂窝接入一样，如果你需要宏观区域覆盖和高速切换，使用 5G 是合适的。但对于大多数企业级应用程序而言，它通常不需要这些功能。从性能角度来看，[Wi-Fi 6][5] 和 5G 在大多数指标上大致相等，包括吞吐量，延迟，可靠性和连接密度。它们并不相似的地方在经济方面，Wi-Fi要好得多。我不认为很多客户愿意用 Wi-Fi 交换 5G，除非他们需要宏观覆盖或高速切换。
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### Wi-Fi 和 5G 可以共存吗？ 企业如何一起使用 5G 和 Wi-Fi？
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**Lipton:** Wi-Fi 和 5G 可以并且应该是互补的。 5G 架构将蜂窝核心和无线接入网络（RAN）分离。 因此，Wi-Fi 可以是企业无线电前端，并与 5G 核心紧密连接。 由于 Wi-Fi 的经济性 - 特别是 Wi-Fi 6 - 是有利的并且性能非常好，我们设想许多服务提供商在有可行的地方使用 Wi-Fi 作为其 5G 系统的无线电前端，充当分布式天线（DAS）和小型蜂窝系统的替代。
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“Wi-Fi 和 5G 可以并且应该是互补的。” — Jeff Lipton
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### 如果一个企业打算完全转向 5G，那将如何实现以及它的实用性如何？
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**Lipton:** 为了将 5G 用于主要的室内访问，客户需要升级其网络和几乎所有设备。 5G 在室外提供良好的覆盖，但蜂窝信号不能可靠地穿透建筑物。 5G 会使这个问题变得更糟，因为它部分依赖于更高频率的无线电。因此，服务提供商需要一种提供室内覆盖的方法。为了提供这种覆盖，他们会部署 DAS 或小型蜂窝系统 - 由终端客户支付。然后，客户将他们的设备直连到这些蜂窝系统，并为每个设备支付服务合同。
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**[[上 PluralSight 学习移动设备管理课程，了解如何在不降低用户体验的情况下保护公司中的设备。][6]]**
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这种方法存在一些问题。首先，DAS 和小型蜂窝系统比 Wi-Fi 网络贵得多。 并且成本不会因网络而停止。 每台设备都需要一台 5G 蜂窝调制解调器，批发价格高达数十美元，而终端用户通常需要花费一百多美元。 由于目前很少或者没有 MacBook、PC、打印机、AppleTV 有 5G 调制解调器，因此需要对这些设备进行升级。我不相信很多企业会愿意支付这笔额外费用并升级他们的大部分设备以获得不明确的好处。
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### 经济是 5G 与 Wi-Fi 之争的一个要素吗？
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**Lipton:** 经济始终是一个要素。让我们将对话集中在室内企业级应用程序上，因为这是一些运营商打算用 5G 定位的用例。 我们已经提到升级到 5G 将要求企业部署昂贵的 DAS 或小型蜂窝系统用于室内覆盖，几乎将所有设备升级到包含 5G 调制解调器，并为每个设备支付服务合同。理解 5G 蜂窝网络和 DAS 系统在许可频谱上运行也很重要，这类似于私人高速公路。 服务提供商为此频谱支付了数十亿美元，这笔费用需要货币化并嵌入服务成本中。 因此，从部署和生命周期的角度来看，Wi-Fi 在经济上比 5G 有利。
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### 5G 与 Wi-Fi 有任何安全隐患吗？
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**Lipton:** 一些人认为蜂窝技术比Wi-Fi更安全，但事实并非如此。LTE 相对安全，但也有弱点。例如，普渡大学和爱荷华大学的研究人员表示，LTE 容易受到一系列攻击，包括数据拦截和设备跟踪。5G 通过多种认证方法和更好的密钥管理改进了 LTE 安全性。
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Wi-Fi 的安全性也没有停滞不前而是继续发展。当然，不遵循最佳实践的 Wi-Fi 实现，例如那些甚至没有基本密码保护的实现，并不是最佳的。但那些配置了适当的访问控制和密码的人是非常安全的。 随着新标准 - 特别是 WPA3 和增强开放（Enhanced Open） - Wi-Fi网络安全性进一步提高。
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同样重要的是要记住，企业已根据其特定需求对安全性和合规性解决方案进行了大量投资。对于包括 5G 在内的蜂窝网络，企业将失去部署所选安全性和合规性解决方案的能力，以及对流量流的大多数可见性。 虽然 5G 的未来版本将通过称为网络切片的功能提供高级别的自定义，但企业仍将失去他们目前需要和拥有的安全性和合规性定制级别。
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### 关于 5G 与 Wi-Fi 之间的讨论有什么最后的想法？
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**Lipton:** 围绕 Wi-Fi 与 5G 的争论忽略了这一点。它们都有自己的用武之地，而且它们在很多方面都是互补的。由于需要连接和分析越来越多的东西，Wi-Fi 和 5G 市场都将增长。如果客户需要宏覆盖或高速切换，并且可以为这些功能支付额外成本，那么 5G 是可行的。
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5G 也适用于客户需要物理网络分段的某些工业用例。但对于绝大多数企业客户而言，Wi-Fi 将继续像现在一样证明自己作为可靠，安全且经济高效的无线接入技术的价值。
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**更多关于 802.11ax (Wi-Fi 6):**
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* [为什么 802.11ax 是无线网络的下一件大事][7]
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* [FAQ: 802.11ax Wi-Fi][8]
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* [Wi-Fi 6 (802.11ax) 正在来到你附件的路由器][9]
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* [带有 OFDMA 的 Wi-Fi 6 打开了一个全新的无线可能性世界][10]
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* [802.11ax 预览：支持 Wi-Fi 6 的接入点和路由器随时可用][11]
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加入 [Facebook][12] 和 [LinkedIn][13] 上的 network world 社区，评论你认为最重要的话题。
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--------------------------------------------------------------------------------
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via: https://www.networkworld.com/article/3399978/5g-will-augment-wi-fi-not-replace-it.html
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作者：[Zeus Kerravala][a]
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选题：[lujun9972][b]
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译者：[GraveAccent](https://github.com/graveaccent)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.networkworld.com/author/Zeus-Kerravala/
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[b]: https://github.com/lujun9972
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[1]: https://images.idgesg.net/images/article/2019/05/wireless_connection_speed_connectivity_bars_cell_tower_5g_by_thinkstock-100796921-large.jpg
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[2]: https://www.networkworld.com/article/3203489/what-is-5g-how-is-it-better-than-4g.html
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[3]: https://www.networkworld.com/article/3354477/mobile-world-congress-the-time-of-5g-is-almost-here.html
|
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[4]: https://images.idgesg.net/images/article/2019/06/headshot_jlipton_aruba-100798360-small.jpg
|
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[5]: https://www.networkworld.com/article/3215907/why-80211ax-is-the-next-big-thing-in-wi-fi.html
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[6]: https://pluralsight.pxf.io/c/321564/424552/7490?u=https%3A%2F%2Fwww.pluralsight.com%2Fcourses%2Fmobile-device-management-big-picture
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[7]: https://www.networkworld.com/article/3215907/mobile-wireless/why-80211ax-is-the-next-big-thing-in-wi-fi.html
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[8]: https://%20https//www.networkworld.com/article/3048196/mobile-wireless/faq-802-11ax-wi-fi.html
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[9]: https://www.networkworld.com/article/3311921/mobile-wireless/wi-fi-6-is-coming-to-a-router-near-you.html
|
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[10]: https://www.networkworld.com/article/3332018/wi-fi/wi-fi-6-with-ofdma-opens-a-world-of-new-wireless-possibilities.html
|
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[11]: https://www.networkworld.com/article/3309439/mobile-wireless/80211ax-preview-access-points-and-routers-that-support-the-wi-fi-6-protocol-on-tap.html
|
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[12]: https://www.facebook.com/NetworkWorld/
|
||||
[13]: https://www.linkedin.com/company/network-world
|
||||
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Reference in New Issue
Block a user