Did you know that nearly 80% of cellular calls occur indoors? Despite cellular subscriber penetration rates that have exceeded 100% in many countries, indoor coverage still varies considerably. With the rise of #GenMobile, subpar coverage is no longer acceptable. More than ever, customers, students, and employees are demanding decent cellular coverage in their buildings. Complaints about spotty coverage can drag down customer satisfaction benchmarks like hospital HCACPS scores and can also launch spectacular Twitter wars.
约翰·莱格（John Legere）是Twitter现象，也是T-Mobile USA的首席执行官
So if indoor cellular coverage is so important, why aren't more venues doing something about it? Simply put, existing indoor coverage solutions are too expensive and complex, even for the largest organizations. Fortunately, Wi-Fi calling promises a revolutionary and cost-effective alternative for the masses.
上周,我们举行了一场well-anticipated网络两部分inar series on Wi-Fi calling. Customers from a broad set of industries including higher ED, general enterprise, and healthcare shared our enthusiasm for providing indoor cellular coverage through Wi-Fi technology. We discussed the technology disruption that Wi-Fi calling will create in the indoor coverage market, along with how organizations can prepare their Wi-Fi networks for this killer new app.
如果您错过了录制的会话，可以在这里找到它们：
Part 1: Downfall of Femtocells, Small Cells and Indoor DAS– A review of Wi-Fi calling compared to other legacy indoor coverage solutions.
Part 2: The Calm Before the Storm- 支持网络上强大的Wi-Fi呼叫体验所需的关键技术考虑。
对于那些对悬崖笔记感兴趣的人，这里有一些亮点。
- Since the introduction of the first iPhone, indoor mobile data has long defaulted to Wi-Fi. With Wi-Fi calling, voice will transition to Wi-Fi when a user is indoors. This essentially makes Wi-Fi access points the new affordable small cell. Do we still need expensive indoor coverage for the majority of indoor spaces? Can we stop discussing DAS (Distributed Antenna System), LTE small cells, or LAA/LTE-U as the only options for indoor coverage?
- Wi-Fi呼唤的历史是一个引人入胜的历史。它已经存在了一段时间（还记得UMA吗？），但是该功能在其时代还为时过早，各种业务动态抑制了早期采用。
- 有了新发现的运营商和制造商的支持，Wi-Fi Call将这次成功。运营商和场地终于有了可扩展且负担得起的承保范围，以保持客户忠诚度。客户将接受它，以改善覆盖范围，减少使用的时间以及漫游的回避。
- 将有一个与Wi-Fi呼叫相关的学习曲线，作为运营商，基础架构提供商（例如Aruba），并且客户随着时间的推移将其实施微调。
- 不要给Wi-Fi打个坏名字！良好的体验需要适当的网络设计。Wi-Fi管理员需要重新评估其覆盖范围，漫游，QoS和故障排除以确保成功。Aruba的功能诸如Asprf和ClientMatch之类的功能，以及802.11k，V，R等新标准是Wi-Fi Calling的新BFF。
- 即使您有DAS（并且是一个百分点：P），您仍然可能仍然关心Wi-Fi，要求您在DAS系统上不支持次级或第三级蜂窝服务提供商。
网络研讨会观众的问题在我们的直播期间迅速而激烈。这是一些值得注意的。
一般的
问：蜂窝提供商是否通常允许Wi-Fi在其服务区域之外致电？
A: Capabilities will vary based on the provider.
问：VoIP在Wi-Fi上是否需要更多带宽？
答：VoIP需要准确的分类，优先级和优化的漫游。在11AC世界中，带宽并不是真正的关注。
Q: You mentioned that DNS queries for the ePDG had a certain structure. Would you share that structure response? Does it contain 3GPP or some other key texts?
答：3GPP格式是这样的：ss.epdg.epc.mnc260.mcc310.pub.3gppnetwork.org。虽然我们看到一些操作员遵循此操作，但另一些则具有自己的格式。
配置
问：如果您知道您的Wi-Fi网络还没有准备好，是否有一种方法可以禁用/阻止Wi-Fi调用？
答：是的，即将到来的Applf功能将允许您根据流量和流量类型禁用。
问：典型的信标间隔为100毫秒。应该增加此或其他高级选项吗？
答：我们通常不会增加信标间隔。语音流量的详细建议在我们经过验证的参考设计文档中http://community.arubanetworks.com/t5/Validated-Reference-Design/tkb-p/Aruba-VRDs(try the "roaming devices" one first)
问：Wi-Fi致电或UCC功能是否需要单独的许可证？
答：不，他们不需要新的许可证，但是需要PEF许可。
Q: What is the recommended minimum AP density?
A: Approximately 50 feet of linear separation between APs (refer to the VRD).
Q: How many of these monitoring/optimization features will be supported with Aruba Instant? Will a controller become necessary as Wi-Fi calling is used more?
答：尽管控制器最终可能会呈现更丰富的UCC仪表板和功能，但Instant将在将来的版本中支持ALG进行检测和分类。此外，可以利用Airwave™进行监视。
问：什么版本的AOS支持802.11 K，V，R？
答：AOS 6.3及以后。
问：什么版本的AO将检测和分类Wi-Fi调用？
答：针对2HCY15的AOS释放。
寻找更多信息？如果您是技术历史爱好者，请阅读我关于Wi-Fi呼叫的文章没有抖动今天。
艾伦·尼（Alan Ni）是惠普（Hewlett Packard）企业公司Aruba的解决方案营销总监。
