Qualcomm's second-generation VIVE launches support for MU-MIMO technology

Qualcomm's second-generation VIVE released to support MU-MIMO technology

At the QCT technology summit held in the United States last week, Qualcomm had a new move in the smart home networking sector - the second-generation VIVE wireless network technology was introduced. The second generation of VIVE stands for VIVE with MU-MIMO, which adds MU-MIMO technology support to the first generation 802.11ac solution. MU-MIMO helps greatly in improving the data transmission rate of the wireless network and the number of bearers on the access device.

Speaking from 802.11

To truly understand Qualcomm VIVE, we must also start with the Wi-Fi technology standards. As early as 1997, the International Electrotechnical Engineering Society (IEEE) developed the IEEE 802.11 standard for wireless LANs. The standard defines the MAC access layer (MAC layer) and physical layer of wireless LANs, and specifies the use of the 2.4 GHz band. The rate is 2MBPs. In general, 802.11 is the original standard for wireless LANs.

Over time, the standard has been continuously updated and more than 20 versions have been evolved to date. The common standards are the following: 802.11a operating in the 5GHz band, the most basic 802.11b and 802.11g, the most mainstream 802.11n, and the latest 802.11ac.

Among them, 802.11n was adopted as the standard for mainstream wireless routing and was approved in September 2009. The standard supports use in the 2.4GHz band and the 5GHz band, supports 20/40MHz bandwidth, uses the MIMO technology for the first time, and uses the 64-QAM modulation mode. The maximum theoretical rate is 600Mbps.

There is a term involved here, that is, MIMO. The English full name of this 802.11n core technology is more easily understood, that is, Multiple-Input Multiple-Output, that is, multiple input multiple output technology. This technology allows multiple spatial channels to transmit and receive data while allowing bandwidth to be increased, thereby significantly increasing the transmission rate of wireless networks. That is, MIMO can be decomposed at the transmitting end and transmit data independently by multiple antennas, and then these data can be received and restored by multiple antennas at the receiving end.

Let's talk about the working frequency band of wireless networks. From the date of establishment of the 802.11 standard, 2.4 GHz has been the main working frequency band of wireless networks. However, as more and more devices access the wireless network, the 2.4 GHz band becomes more and more crowded and the network carrying capacity is stretched.

The 5GHz is considered to be a relatively clean wireless network band, and its scope is undoubtedly wider and wider than 2.4GHz. The 2.4GHz has 11 or 13 (depending on national regulations) available channels, while the 5GHz channel has as many as 160 channels. In addition, there are not many devices supporting the 5GHz band at this stage, so there is almost no mutual interference between devices in this band.

Speaking of this, we want to lead 802.11ac. This standard is based on 802.11n and is the main development direction of wireless LAN. 802.11ac no longer uses the 2.4GHz band and is fully operational in the 5GHz band, so we also refer to it as 5GHz Wi-Fi.

802.11ac adds 80/160MHz to the bandwidth of 20/40MHz, adopts a higher-level 256-QAM modulation mode and supports 8x8 MIMO technology, and has a maximum single-stream rate of 867Mbps and a theoretical maximum speed of 6.9Gbps. . At present, mainstream home 802.11ac routing adopts 3x3 MIMO design and can support 20/40/80MHz bandwidth. The theoretical maximum speed of the 5GHz band is 1.3Gbps, which is why many people control 802.11ac products called Gigabit routing.

What is Qualcomm VIVE?

The wireless network standard says so much, but in fact it is to explain what Qualcomm VIVE is. VIVE is Qualcomm's wireless network solution based on the 802.11ac standard. It can provide a complete set of optimized designs for wireless networks. For example, in VIVE, Qualcomm applied StreamBoost technology, which can intelligently identify and prioritize the types of data transmitted in all wireless LANs. For example, online video data streams have the highest priority, and file downloads take precedence. The level is lower. With such intelligent identification and traffic distribution, StreamBoost can greatly optimize the home unlimited network experience.

At present, in the high-end home wireless router market, there are already excellent products equipped with Qualcomm's VIVE solution. I personally yearned for D-LINK's Gaming Router DGL- which was called "the world's fastest domestic router" at the time. 5500.

Second-generation VIVE solution

Qualcomm's second-generation VIVE is the most important addition to the support of MU-MIMO technology. The initial MIMO has made a great leap in improving the transmission rate, but it is only for one transmitting end and one receiving end. In other words, it is a single user with multiple inputs and multiple outputs. Wireless routing can only serve one access device at a time. The MU-MIMO MU is an abbreviation for Multiple User. MUBF (Multi-user Beamforming) uses multiple access devices at a time.

In the face of more and more devices and terminals accessing wireless LANs, MU-MIMO technology can effectively improve the number of devices and transmission rate of wireless networks in homes, small offices, and other environments. Reduce client-side time for "one-to-one (single-user)" situations.

MU-MIMO technology allows wireless routing and client group conversations, each group can accommodate 3 devices. In the same way that three devices transmit data, SU-MIMO technology can only allow wireless routers to serve three devices in turn, while MU-MIMO can use these three devices as a group and serve simultaneously. As a result, the output of the user data protocol can be increased by 2-3 times.

Talk about ecological environment again

The successful application of MU-MIMO multi-user multiple-input multiple-output requires both the transmitter and the receiver of the data to support this technology, that is, not only the home gateway, wireless routing, etc. need to support MU-MIMO, mobile phones, tablet computers, smart TVs. Even the future of the car networking vehicles also have to support MU-MIMO.

Therefore, it is particularly important to build a corresponding ecological environment, which is one of the goals of Qualcomm VIVE solutions. It is reported that Qualcomm will launch VIVE solutions for home routing and wireless gateways, enterprise APs, mobile computing, consumer electronics, and automotive.

For example, the top products QCA9980 and QCA9990 in the field of home routing and wireless gateways and enterprise APs can already support the highest transmission rate of 1.733Gbps; QCA6174 integrated in Opteron processors and QCA9387 used in consumer electronics products are mainly for the Vehicular Network. QCA6574, can carry the highest transmission rate of 867Mbps, while also integrating Bluetooth 4.1 support.

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