（上稿者按：由于大家Computex展时间都抓得很紧，再加上又是以产品为主，即便会写到，但以写作型态来讲，实际不是很合乎写WiMAX的事物，因为个人以为WiMAX的观望，恐怕比实际的出品还显得主要。所以个人极其请对WiMAX有确定水平观察的写手，来写较为深度的报纸发表，提须求读者。笔者是拗他写三篇，不过他独有交两篇。）继2018年5月严热上场的WiMAX Forum，结果二零一四年的WiMAX EXPO却不比二零一八年红极有时，其实并不诡异，毕竟2018年WiMAX获得国际邮电通讯团队核可，正式成为3G的一员，可是WiMAX广义来讲与3G并不一般，其它的3G通信协议都有隐含语音的部份，然则WiMAX却是以数量传输为主，独一的契机在于，由于得到料定，原来WiMAX一向未定案的频谱，终于得以与别的3G共享。也是因为此原因，二〇一八年WiMAX Forum声势大噪，各会员也将压箱宝拿出去体现。上海教室是体验巴士，说真的，不是体会巴士不想玩，而是没啥有趣的。
Most modern WLANs are based on IEEE 802.11 standards and are marketed under the Wi-Fi brand name.
Driven by Data Center Business, Silicon Photonics
[In depth report: Is WiMAX ready for us? ]WiMAX seems to be an awesome solution to on-the-go connectivity. Since the WiMAX Forum was launched in October last year, we have covered all kinds of products and many possible applications of WiMAX. However, the WiMAX EXPO this year didn't turn out to be as popular as last year. What happened to this rising star? We will try to discuss the past, present and future of WiMAX in a series of three reports. Click on the link to read more.
WLAN 工作在 OSI 的层一和层二，即 Physical layer （PHY)）and Data Link layer（MAC & LLC）。假如你熟习 wired network，如 Ethernet，对照了然就可以。
A wireless local area network (WLAN) is a wireless computer network that links two or more devices using a wireless distribution method (often spread-spectrum or OFDM radio) within a limited area such as a home, school, computer laboratory, or office building.
Industry Enters Early Explosive Stage
简轻便单地说，Wi-Fi 是 WLAN 的七个切实可行落实技巧，基于 802.11 标准，致力于业界产品互操作性的测验和验证，Wi-Fi 商标由 Wi-Fi 缔盟具有。追溯起来，Wi-Fi 不是怎么样缩写，正是选出的三个 名字。
Wi-Fi is a trademark of Wi-Fi Alliance. It is actually not a standard and only ensures that products using this trademark can interoperate with each other. As most Wi-Fi products use the IEEE 802.11b standard, Wi-Fi usually refers to 802.11b. Wi-Fi is a new technology that uses the WLAN protocol.
Wi-Fi can provide wireless coverage in an area with a radius of up to 90 m (300 inches), while the WLAN can provide wireless coverage in an area with a radius 5 km (with antennas used). The biggest advantage of Wi-Fi is its high transmission speed (up to 11 Mbit/s). Wi-Fi is a short-distance wireless transmission technology applicable to offices and households.
——In-depth report of optical communication industry
WiMAX was approved by ITU and became a member of the 3G family. However, in a broader sense, WiMAX is actually different from 3G. All the other 3G protocols include voice transmission, but WiMAX is solely based on data transmission. Nonetheless, the approval by ITU allows WiMAX to share the frequency with other 3G protocols. Therefore, WiMAX becomes the rising star of telecommunication, and the industrial partners of WiMAX Forum have unveiled all kinds of products.So what exactly can WiMAX do? In simple terms, WiMAX is a long-range wireless network that allows you to stay connected at up to 80 km/hr. What you usually do on your computer at work or at home can now be done in your car (that is, if you have daredevil driving skills). Most of its application was already demonstrated last year, so there is really nothing new to see this year. Also, system providers will determine what to offer on the WiMAX network, and the end-user device will follow, not the other way around. As a result, the WiMAX EXPO is kind of boring this year, unless the Forum comes up with new applications. 假设功耗难点能缓慢解决WiMAX手持上网装置才有搞头作者多少看了一晃，今年相比较新鲜的应用，独有大伙儿与保全业者联盟的WiMAX运输钞票系统，这些有线提款机就算了，大旨的股票总值在于运输钞票车选用WiMAX全程监视录制，那确实是WiMAX最大的卖点应用，如此一来，尽管被掠夺，远程也仍是能够具有全程的照相画面，不至于像带被拿走。其余，WiMAX会对导航图资业者形成一定大的打击，极其Google在United States际信托投资公司标700MHz频段，原来正是想用在WiMAX，如若WiMAX真的兑现，那很对不起，都会图资跟本不需花钱买怎么Papago或是汤姆汤姆，直接利用网络图资就足以了，当中等射程指标的120海里行动传输完结，只要不飚车，在高速度公路基本上也够用了。
A hotspot is a physical location where people may obtain Internet access, typically using Wi-Fi technology, via a wireless local area network (WLAN) using a router connected to an internet service provider.
Wi-Fi is the technology. You build a wireless network based on the Wi-Fi specifications and principles.
An Access Point is a physical device which is used to offer Wi-Fi service to a small area.
A Hotspot is the area served by an access point.
So, you go to a hotspot so you can connect with an access point using Wi-Fi.
Hotspot is the where, access point is the what, Wi-Fi is the how.
present, the silicon photonics market is not too big. It is estimated that
偶然在EXPO看到的口号 公然声称Wi-Fi已经不符合时机 囧
Wi-Fi and Internet
sales in 2015 will be less than 40 million US dollars. In fact, only a few
companies have begun to ship products in the open market. According to market
research company Yole Développements, the data center and several other new
applications will bring a multibillion-dollar market for silicon photonics
technology by 2025. Yole analysts pointed out that investment from venture
capitalists (VCs) and several start-up companies in these fields has increased,
showing that silicon photonics technology has reached the tipping point before
the forthcoming large-scale growth.
Silicon photonics technology is
still in its infancy in the country. Future optical communications vendors and
semiconductor manufacturers are likely to benefit from the industry outbreak.
It is recommended to pay attention to the optical device manufacturer Ascension
Technology, China International Equipment (to be acquired by Suzhou Xuchuang),
etc.; semiconductor manufacturers SMIC, Changjiang Electronics, and Tongfu
Microelectronics. ν Data center traffic growth pushes the internal chip level
of the data center into copper retreat: At present, the data center is mainly
based on 40G and 100G modules. Cisco data shows that data center traffic will
reach 5 times in 2020, and demand will drive data center to 200G and 400G. And
other high-speed transmission evolution. The 50Gb/s copper circuit is close to
the limit of transmission, and it is inevitable that the copper level at the
chip level falls into the copper.
Compared to III-V materials,
silicon photonics technology utilizes CMOS technology, which has cost
advantages and is very promising in the future. ν The difficulties in the
development of the industry are gradually being broken and may break out in the
next two years: In the case of silicon-based lasers, the hybrid products of
III-V materials and silicon optical circuits have been commercialized, and pure
silicon lasers have already achieved laboratory breakthroughs; The problem of
the power consumption of light instead of electricity was initially solved by
IBM; both laid the foundation for the commercial use of silicon photonics
technology. We are optimistic about the development of the industry. At
present, Acacia 2016Q3 revenue reached US$135 million, and SiFotonics silicon
PD/APD chip has shipped nearly 1 million units. Intel announced in August that