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802.11ac Wave 2标准正式推出,速度提升一倍,支持MU-MIMO技术
来源:WiFi Alliance | 发布时间:2016-7-10 12:41:26 | 浏览次数:

WiFi联盟推出新标准:速度提高一倍

 

[摘要]802.11ac Wave 2标准正式推出,速度提升一倍,支持MU-MIMO技术,几台设备同时上网不会受到太大影响。

 

 

20160710 80211acwave2.jpg

 

Engadget中文网 7月1日报道

你可能还在等待802.11ad标准的到来,因为它可以大幅提升WiFi的速度。WiFi联盟却告诉我们,它已经推出了802.11ac Wave 2标准,不需要改变硬件,就可以实现速度的飞跃。

在802.11ac Wave 2标准中,每个信道的带宽提高了一倍,如果条件良好,性能可以翻倍。

不只如此,新标准还支持空间串流技术,支持更宽的5GHz通道和MU-MIMO(多用户多入多出技术)。有了MU-MIMO技术,即使家中的其它人正在播放流媒体视频,你的网速也不会受到太大影响。MU-MIMO可以让更多设备同一时间在同一网络内运行,不会影响速度和性能。目前的无线接入点一次只能接收一台设备的数据,或者传输数据至一台设备,它需要在不同的设备之间快速切换。有了MU-MIMO,一个接入点或者路由器可以同时向多台设备发送数据,提高吞吐量、提升效率。

最吸引人的地方在哪里呢?现有的路由器也可以支持新标准。无数的802.11ac路由器已经支持Wave 2的某些功能,只要对固件升级,就可以使用完整的Wave 2功能。有了802.11ac Wave 2技术,网络最大信道带宽从80MHz提升到160MHz。另外,如果设备需要获得新标准的认证,必须拥有4个空间串流,之前只有3个,这一点相当重要,因为空间串流越多,速度提升越大。

新标准还扩大了对5GHz信道的支持。根据WiFi联盟的介绍,超过65%的WiFi设备支持双频段,可以用2.4GHz和5GHz运行,到了2020年,这一比重将会上升到96%。

WiFi联盟认为,一系列新功能将会对WiFi性能造成很大影响。设备如果拥有全部新功能,速度可以比802.11ac设备快3倍。在未来5年内,大部分的接入点都会支持新功能。

虽然市场上已经有许多的802.11ac Wave 2设备,但第一批获得WiFi联盟认证的设备只有如下几种:博通BCM94709R4366AC接取器、Marvell Avastar 88W8964 WiFi芯片组、联发科MT7615接收器参考设计和MT6632 STA参考设计、高通IPQ8065路由器、Quantenna QSR1000 WiFi芯片组。除此之外,HPE(惠普Enterprise)、思科、华为、Imagination Technologies的产品也会支持新功能。(原作者:Jon Fingas 编译:安安)

Wi-Fi CERTIFIED™ ac brings new advances in Wi-Fi® performance 

Expanded features bring higher performance, speed, and capacity to Wi-Fi networks

Austin, TX, June 29, 2016  Wi-Fi Alliance® is expanding Wi-Fi CERTIFIED™ ac to include new features that provide a higher-performance mobility experience. New “wave 2” features enable Wi-Fi® to more efficiently handle high-bandwidth applications from an increasing number of smartphones, tablets, TVs, and other consumer electronics devices simultaneously connected to Wi-Fi networks. Wi-Fi CERTIFIED ac delivers greater network capacity and multi-gigabit speeds to benefit consumers, service providers, and enterprises.

Multi-user Multiple Input Multiple Output (MU-MIMO) is among the most anticipated new features of Wi-Fi CERTIFIED ac, allowing more devices to operate simultaneously on the same network without sacrificing speed or performance. In addition to increased network capacity enabled with MU-MIMO, devices supporting the full set of new features are capable of achieving up to three times the speed of devices supporting only original Wi-Fi CERTIFIED ac features. The newly introduced features are:

·      MU-MIMO: Networks with MU-MIMO are capable of multitasking by sending data to multiple devices at once rather than one-at-a-time, improving overall network efficiency and throughput

·      160 MHz channels: Wi-Fi CERTIFIED ac increases the maximum channel bandwidth from 80 MHz channels to 160 MHz channels, potentially doubling transmission speeds

·      Four spatial streams: Device speeds are proportional to the number of spatial streams. Wi-Fi CERTIFIED ac now includes support for four spatial streams, up from three spatial streams.

·      Extended 5 GHz channel support: Wi-Fi CERTIFIED ac encourages device support for a greater number of available channels in 5 GHz. Support for additional channels makes more efficient use of available spectrum and reduces interference and congestion by minimizing the number of networks operating on overlapping channels.

“Wi-Fi CERTIFIED ac gives users a greater experience in dense environments by maximizing Wi-Fi network resources, providing a richer set of features, and enabling the full potential of the technology,” said Andrew Zignani, research analyst, ABI Research. “Wi-Fi Alliance assists in the proliferation of certified products into the market, and we expect an increasing number of data-intensive devices to support the new features for Wi-Fi CERTIFIED ac that will benefit device end users through this certification process.”  

Wi-Fi CERTIFIED ac was the first version of Wi-Fi to break the gigabit barrier, accelerating the shift to greater utilization of the 5 GHz band. Now, more than 65 percent of devices are dual-band, operating in both 2.4 and 5 GHz. The Wi-Fi CERTIFIED interoperability certification program will increase product support for newly supported features from a wide variety of mobile devices and access points, and 96 percent of devices will be dual-band by 2020. Access points supporting new features are expected to dominate the market within the next five years.

“In today’s world, people have more Wi-Fi devices per person and per household, and those devices require significantly more bandwidth,” said Edgar Figueroa, president and CEO of Wi-Fi Alliance. “Wi-Fi Alliance updated the Wi-Fi CERTIFIED ac program to meet increasing user demands and to stay ahead of emerging applications, while preserving interoperability.”

The first Wi-Fi CERTIFIED ac products to support new features and which comprise the test bed for interoperability certification are:

·         Broadcom BCM94709R4366AC

·         Marvell Avastar 88W8964

·         MediaTek MT7615 AP Reference Design and MT6632 STA Reference Design

·         Qualcomm IPQ8065 802.11ac 4-stream Dual-band, Dual-concurrent Router

·         Quantenna QSR1000 4x4 802.11ac Wave 2 Chipset Family

For more information and a list of Wi-Fi CERTIFIED ac products, please visit: www.wi-ficertifiedac.com.

Industry response to Wi-Fi CERTIFIED ac with wave 2 features:

“The Wi-Fi CERTIFIED ac program, based on the IEEE 802.11ac standard, has been an unmitigated success for billions of Wi-Fi users worldwide. The program delivered a combination of very high throughput, improved rate-vs-range, and interoperability, while continuing the well-established trend to higher capacity 5 GHz unlicensed spectrum. The next wave of 802.11ac technology is here, offering even higher network efficiency and up to twice the throughput. Broadcom is ecstatic our BCM94709R4366AC access point and station platform has been selected for the Wi-Fi CERTIFIED ac wave 2 test bed.” - Clint W. Brown, Broadcom Director, Wireless Combo Connectivity Group

“Cisco has always been proud to be among the industry leaders in wireless technology. That’s why it’s so important to have the backing of Wi-Fi Alliance to help spur the wireless community forward in adopting the 802.11ac Wave 2 features. Wi-Fi Alliance understands that 802.11ac Wave 2 products are an integral part of the next wave of connectivity and will ultimately make communication faster, easier and far more efficient for customers.” - John Apostolopoulos, VP/CTO for Enterprise Segment,Cisco Systems

"As one of the vendors shipping 802.11ac wave 1 access points that were certified in the original Wi-Fi CERTIFIED ac program in 2013, we are excited to support new wave 2 features in our Aruba 330/320/310 Series access points. HPE/Aruba believes in the importance of product interoperability to assure our customers' success. We are committed to submitting products to Wi-Fi Alliance for evaluation and certification under the second release of the Wi-Fi CERTIFIED ac program." - Christian Gilby, Director of Product Marketing at Aruba, a Hewlett Packard Enterprise company

“Wi-Fi CERTIFIED ac is an important certification program that enables Wi-Fi to bring gigabit access to users. The new Wave 2 features with Wi-Fi CERTIFIED ac will provide customers with a remarkable end user experience in a broad variety of applications." - Dr. Wen Tong, CTO, Huawei Wireless

“Imagination’s IP technologies are at the heart of many devices, including mobile handsets, tablets, TVs, set-top boxes, and connected cars, that support high-throughput applications such as Ultra HD and 4K video and multimedia streaming. We are already seeing strong demand for new Wi-Fi CERTIFIED ac wave 2 features in building the next wave of connected devices for such applications. We will support the new wave 2 features in our Ensigma RPUs, which provide highly scalable and flexible connectivity IP solutions.” - Richard Edgar, Director of Communications Technology, Imagination Technologies

“Intel is glad to see Wi-Fi Alliance continue to advance Wi-Fi technology with the launch of the second wave of the Wi-Fi CERTIFIED ac program, adding features such as downlink MU-MIMO to improve network data capacity in dense environments such as enterprise networks. Wi-Fi CERTIFIED solutions lead to broad industry adoption and pave the way for interoperability and improved user experience.” - Eric Mclaughlin, Connectivity Product Line Manager, Intel

“Today’s announcement marks another great milestone for Wi-Fi technology. As the demand for wireless connectivity continues to grow in our daily lives, the second wave of Wi-Fi CERTIFIED ac brings to the table another major step-up in terms of Wi-Fi speed, performance, and network capacity. Marvell is proud to be a leading provider of wireless technology by offering a full suite of MU-MIMO capable wave 2 chipsets, delivering best-in-class performance across multiple ecosystems. We look forward to continuing our collaboration with Wi-Fi Alliance to enhance today’s user experiences with cutting edge technology.” - Kevin Tang, AVP of Marketing, Wireless Connectivity Business Unit atMarvell Semiconductor, Inc.

“Consumers today expect to use multiple devices on a constant basis without any connectivity issues. At MediaTek, we’re committed to delivering great user experiences by empowering smartphones, tablets, televisions and other consumer electronics, enabling seamless, cross-device connections. We are proud to see our technology once again embraced by Wi-Fi Alliance for the latest interoperability testing based on the IEEE 802.11ac program. We have included the Wave 2 features in our products and are working with our OEM partners to bring enhanced network capability to markets.” - SR Tsai, General Manager of Home Smart Device Business Unit, MediaTek

“Qualcomm Technologies has led the industry on 802.11ac Wave 2 MU-MIMO with over 100 commercial devices available to date. Today’s announcement will further accelerate commercial adoption, delivering an enhanced Wi-Fi experience in our increasingly congested, connected world. We are proud of our engineering team’s accomplishments to have led this new program, be included in the interoperability test bed and are committed to continue leading innovation within Wi-Fi Alliance in the areas of network capacity improvement and superior user experience.” - Rahul Patel, senior vice president and general manager, connectivity, Qualcomm Technologies, Inc. 

“Thanks to Wi-Fi Alliance, the benchmark of Wi-Fi CERTIFIED ac ensures that Wi-Fi enabled products deliver the necessary features and benefits for the best consumer experience. We are grateful to be part of the Wi-Fi Alliance ecosystem and excited to be among one of the first vendors selected into the updated Wi-Fi CERTIFIED ac certification program with our QSR1000 4x4 802.11ac wave 2 chipset family. As the requirements and utilization of Wi-Fi networks grow much faster than ever, interoperable Wi-Fi CERTIFIED ac wave 2 features and capabilities will become even more important for future connectivity at home, at work, or in public places.” – Dr. Sam Heidari, CEO at Quantenna Communications

 


 
 
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