Many people are puzzled by the fact that some routes can sell thousands of routers. What is the difference between it and more than one hundred routers? Not long ago, I got a Netgear R7800 wireless router, according to the official: its maximum transmission up to 2600Mbps . So how is the AC 2600 of the R7800 netbook calculated? Â Â In fact, there are three main factors that determine the transmission rate of wireless routers: QAM , bandwidth, and MIMO ; now 802.11ac uses 256-QAM FM technology, 4 antenna support, plus MU-MIMO multi-user multitasking, we can simply The calculation is:
Under 256-QAM , the maximum transmission of an antenna of 2.4G band 40MHz bandwidth can reach 200Mbps , 4 is 200M 4=800Mbps; and 5G band is generally 80Mhz bandwidth, an antenna is 433Mbps transmission, 4 antennas transfer is 4334 = 1732Mbps (generally considered its maximum transmission of 1733), the maximum transmission dual calculated R7800 is 800 + 1733 = 2533Mbps, I believe that the network element in rounded, so called R7800 AC2600.
NETGEAR R7800 did not choose to continue to cooperate with Broadcom, and personally feel that it is a technical issue Broadcom, Broadcom and he gave up the network chip this market, Qualcomm technology in the new 802.11ac wave2 primary function is to MU-MIMO, It is also the need for the core technology of high-end routers in the future. A simple statement about MU-MIMO multi-user multitasking technology: It allows the router's antenna to communicate with different signal terminals and communicate with multiple devices at the same time, while the previous generation of MIMO is a single task signal connection, if multiple Equipment operation at the same time, you need to sort by the order of tasks, more tasks may also be blocked or lost, this point in the R7800 package behind the legend has been made very clear.
The development of high-end fever routers in these two years has been very fast, and the highlights of high-end routers have also continued to emerge. Before being accustomed to using Broadcom's processor netware , today's Netware R7800 is equipped with Qualcomm's IPQ8065 chip, clocked at 1.7GHz dual-core processor, with 128M memory and 512M flash memory. Using the latest MU-MIMO technology, it is also the first wireless router to support all 802.11ac Wave 2 functions. As such, four antennas are also basic requirements for MU-MIMO technology, which makes it connected to multiple terminal tasks. Faster and more stable.
Unlike in the past is NETGEAR R7800 of five network interfaces used in all Gigabit to the current situation gigabit LAN has basically been popularized, and WAN port will take some time to develop, and I was at home telecommunications fiber Is 20Mbps rate , plus the optical cat is also a hundred trillion output, feeling WAN port Gigabit design somewhat ahead of time. However, I am more fancy, its USB interface has entered the 3.0 era, while eSATA support, so that the R7800 is very powerful in external storage, but also according to its firmware system to build a simple and practical home NAS .
Maybe people will think that the netware firmware system is too simplistic. At the beginning, I also had this kind of idea. However, after a long period of use, I feel that the stability of the netware operation is not comparable to other routers. The firmware system operation involves the CPU. Algorithm and memory storage. The network management method of R7800 mainly includes WEB , PC management software, IOS/Android APP, and so on. For many wireless routers in the smart era, they are accustomed to the configuration and management of mobile phones. In fact, netware is earlier than other manufacturers in this block.
( PC Management Software)
( web management)
(Mobile APP )
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To play high-end routers, we must seize its focus. For the R7800 's Internet access configuration operation, I would not say more; several highlights are briefly described here:
1 , people who played high-end routers will say the signal is very general, if you turn its domain area into North America, it will be much stronger than before.
2, Qos high-end focus, because it is larger than with a machine, so the flow control certain aspects of the good relations.
3 , in the fever of netware products, there will be these offline download functions, due to different regions, the speed is not the same.
4, high-end router with media server, you can group a simple NAS function.
To be honest, I played a lot of high-end routers, and the signal was not really its focus. At the beginning, I did not report very high hopes on the signal of the R7800 . However, after testing, it gave me another look. One of my first test drawings: a dwelling room with more than 80 square meters.
Use laptops and smartphones to test the signal coverage of the R7800 . The notebook uses an external USB (net ac6200 ) wireless card and the phone is OPPO Android 5.1.1 .
Judging from the test results, the NETGEAR R7800 performs quite well. There are at least two walls separated by point C. The signal can also be within -70dBm . This has no impact on normal Internet access, video, and downloading . Within 70dBm to ensure signal quality problems. We find that the signal of 2.4G is always stronger than the signal of 5G . This is mainly because the signal wavelength of 2.4G is longer than that of 5G . However, in terms of signal quality, 2.4G is far worse than 5G , and the 5G interference source phase A lot less than 2.4 .
 I also said earlier that the focus of high-end routers is not the signal, but its maximum transmission rate, and the intelligent allocation of QoS control. If there is only one mobile phone and one computer at home, then using a high-end router is a waste, and 50 routes are enough to get. My home's smart devices may be a bit more, four phones, two tablets, a desktop computer, two notebooks, two televisions, a NAS , a chasing download artifact, wireless AP , smart empty net, home network There is also an Xbox game console that needs to be online . Although they will not be used at the same time, there are no less than 8 terminals that are online at the same time every day . This requires me to be on the same level as the fever router. R7800 of 2.4GHz and 5GHz signal chip actually uses the same QCA9984 chip, and 256-QAM technology also allows maximum transmission 2.4G reached 800Mbps, and 5G up to 1733Mbps. Then you according to my own home environment to test R7800 throughput.
(Photos from the Internet)
Client: PC desktop win7 64 bit
Software Version: IxChariot Endpoint 7.10
Control side: pen forgotten win7 64 bit
Software Version: IxChariot Console 6.7
Notebooks are tested with wired and wireless ( USB external Ac card)
In fact, there are many factors affecting the amount of transmission. The results of my own tests show that the NETGEAR R7800 is sufficient. This time it does not use tri-band mode like the R8000 or R8500 , but its transmission is sufficient to allow dozens of terminals to work simultaneously.
Simple test a small environment: three mobile phones a platform, two computers work and use the situation, see the video and live broadcast card is not a card (I am a 20Mbps telecommunications users), after the network parts R7800 wireless router Qos flow control management, Their use at the same time has no effect.
Looking at the transmission of a group of internal networks, other large speeds have reached 66.5MB/ sec, which is high enough for our single-line transmission rate. Of course, we must also consider the read/write speeds of computers and storage devices.
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Personal view of the R7800 router:
R7800 as a high-end network router element, although there is no tri-band wireless transmission, but the test results it can be seen that quite a force signal and a transmission performance. The maximum transmission of 2600Mbps brings great help to the future smart home life. For the purpose of home life, it will not be eliminated for at least 5 years. According to the official website of Yixun , the price of the R7800 is 2200. The personal feeling is somewhat high. It may be because it is a new product. Another is that it is the first wireless router that supports all 802.11ac Wave 2 functions. The highlights are also numerous, and perhaps wait for a while for it to drop slightly.