In the previous article, the owner explained the wifi protocol, router rate, equipment-side wireless rate bottlenecks, mimo technology, as well as the common router's choice of pits, and below we look back in the most refined language, and the friends who read the last one can skip it。
(1) the wifi agreement was established by a commercial union of network equipment manufacturers (wifi alliance). So far it has reached the sixth generation, i. E. Wifi6. Their relationship is wifi4, wifi5, wifi6 for 802. 11n, 802. 11ac, and 802. 11ax. The wifi protocol standard is accepted in the selection of routers, the ac standard is generally used in mainstream purchases, and the wifi6 or ax words are accepted directly
(2) the wireless rate indicated by the router is the folding acceleration rate for each frequency segment and is not the maximum rate you can achieve by accessing the device. Take the example of huashuac66u. Its product page is marked 1750m, which was added by 450m of 2. 4g and 1,300m of 5g. That means you have a single device at a maximum speed of 1,300 m. It's the bigger the number, but it's not the stacking rate you think it's, so there's no need to be too big for numbers. That's enough. 1750m is enough
(3) the bottlenecks at the end of access: the bottlenecks at the maximum rate of wireless networks are often not in routers but at the end of access (cell phones, computers). Wireless network communications are a mutually compatible process between routers and access end. At the end of the mobile device, almost all mobile phones and laptops are equipped with wifi antennas of 2*2 mimo standard, i. E. The maximum connection rate is only 866 m。
(4) mimo is a multi antenna transmission technology that can double the rate. At present, 1,300 m under the ac standard is achieved through 3/3 mimo (433*3 = 1300 m). The mimo is also known as su-mimo (i. E., the single-user mimo), although it supports multi- antenna transmissions, only communicates with one terminal at the same time。
Su-mimo is like this, and it takes a pass
So there's the mu-mimo
The mu-mimo is a good thing, but the restrictions are too stringent and the receiving bottlenecks can cause the mu-mimo to become directly disabled. So there's no need to pursue mu-mimo under the wifi5 standard
(5) pipe 1: ggborg publicity, ggg net portal. More than $100 in products, watch out for parameters when buying, and prevent pitfalls
(6) pipe 2: exaggerated propaganda, through the wall king. ** there are national limits to the power of the wifi and there are no particularly wide coverage gaps for products that meet national requirements. So the fundamental means of addressing the coverage is the addition of multiple deployments
(7) pit 3: power cats are not as good as you. ** electric cats can be said to be extremely demanding if they want to have good experience. Therefore, use is strongly discouraged and user experience is very poor。
Ii. What else do we need to know before we can buy a router? The pit
We're going to continue with the parameters common to the routers and the pits hidden
1 overview of router chips
If the router is a super-micro computer, it's no big deal. What we often say about stability and availability depends on two parts, hardware on the one hand and systems on the other. First, hardware is similar to computers, with attachments such as cpu, memory and external storage, and these hardware indicators determine the performance and frequency of a router。
In general, low-cost routers usually use low-cost processors such as idbmtk, takatung, ruyen and heath, which are equipped with 64mb/128mb memory, while high-end routers use cartoon broadcomm, which has a higher frequency and stronger performance, often with more than 256mb configurations. But there's a lot of caloric heat going on in the processor。
So, in general, when high-end routers choose to purchase basic configurations, they do well in every aspect of the blog broadcomm's chip, and the late brushes are more supportive of the gods. Nothing special. The f. I. K. 3 is a cartoon broadcomm chip that's both fun and performance。
The focus is on low-end product shopping, and we need to pay more attention to chips for 50-300 dollar-grade products。
Icd mtk processor
The main recommended purchase of routers using the undgc mtk processor, in particular the mt76xx series of processors at mtk, is currently supported by strong third-party solids and has high funability, which is a very good value for money option. The largest feature of the united nations development programme (undp) is its cheapness, which leads to high market occupancy rates, which directly leads many great gods to develop mtk-based brush solids. At present, for example, the popular “destroy” k2p and newifi3 are processors using the mt76xx series。
The remaining three chips, which are to be bought by gotham, ribbons and heath, need to think twice。
First, there are high-intensity chips, which perform well, and there are also a number of high-end circuits using high-intensity chips. But it is still too small and the market share is low。
The owner of the swiss chip and the heath chip is not recommended for purchase, and can go straight through. These two chips are very low-performance, and there's hardly any solid thing to brush。
Recommendations based on mtk's mt76xx series of products: fiji k2p, newifi3, polar 3
2. Deployment elements of soft-routing
As mentioned above, routers are small computers, so it is entirely possible to change a router with a computer configuration, or with a master board of finished products, which is basically the same for the soft route of finished products. All that matters is the installation of different route systems, like computer-based systems。
The current mainstream soft-routing systems are: love speed, google, openwrt and lede, which is based on openwrt. Among them, the owner used love speed and lede to perform well (mainly or possibly the owner's high configuration, using i5 3570s cpu as a server, assigned 2 core 4g rams to the soft route)
Because we're a guide to avoiding pits, or are we going back to talking about soft roads
(1) soft circuits can be fully adapted to used computers, but you must consider the issues of power consumption and heat dispersion, after all, 24h. In fact, the use of used notebooks is a good option, and the normal notebooks are relatively low-cost, so they can be used with an extended web card, which can no longer be used on a single line。
(2) the soft route by which a finished product can be purchased on a treasure hunt is generally sufficient for j1900 cpu to have much of its performance left。
(3) the owner of the building is currently using version x64 of lede, which requires a 4g memory for the installation system, which needs to be noted, and which is less expensive。
(4) the normal product soft route for the cpu is not good for the fans, the noise is high, and it is best to change the silent fan to the other。
(5) talk about the choice of a soft route system:
The advantage of fast love lies in commercial applications such as flow control, authentication (micro-credit login), which allow for simple broadband multi-allocation, superloading, load balancing, etc. And it has a fast ac controller that can extend the wireless network directly. Remote login control networks can also be easily made available through fast cloud love. In short, fast experience is very simple and more business-friendly, allowing customers to authenticate their tweets and allowing them to access the internet with a focus. Or assign the tenant the password to the account number on the internet pppe, so that the dial-up can be placed online. Love is much more suited to the country's set-up needs, and more humane. The disadvantage is that some of the functions you can't say can't be achieved without an extension plugin。
The owner of the lede building is defined as a more suitable hottie, which can perform a variety of functions, but you can't imagine it without him. However, it is a little more difficult to do so, and sometimes it may be necessary to understand the code and programming. But its built-in software center is so powerful that it can perform the functions you want。
3. Large area coverage above 100 square and how to travel seamlessly
Now that everyone has a better quality of life and a bigger house, the wifi cover is getting less and less effective. In previous issues, it has been repeatedly emphasized that the best solution to large area coverage is multi-point ap-by-ap coverage。
That means that we need to deploy multiple wifi points at home to achieve strong signals and speed in every region. So there's a problem: when we move two wifi points, we need to switch the signal automatically and keep the mobile device always connected to the best wifi points. It's time to introduce the wifi roaming mechanism。
When the network environment has multiple aps of the same sid and their coverage overlaps with each other to a certain extent, wireless users move throughout the wlan-covered area. Wireless cards automatically detect the most powerful aps in the vicinity and, through this ap-receiving and sending data, maintain uninterrupted network connections, known as wireless roaming。
If you're a perfect web user, then it's time to introduce the wifi quick rover program, to further shorten the network break time through wifi quick wandering, to improve the web use experience, and to truly switch the wifi to cardon in the game
For the wifi network system with the ac controller, the roaming process can be divided into three simple phases: wandering triggers the selection of new aps for recertification. This is when 802. 11k/v/r agreements are required。
Wifi roaming, which is capable of applying the 802. 11k/v/r protocol, can be described as fast roaming, but this requires both ap and terminal support. In fact, there are not many terminals that can support the 802. 11k/v/r protocol, except for apples, all of which support 802. 11k/v/r。
Conclusion: wide-scale web experience necessitates the introduction of roaming mechanisms, so only two options for equipment selection are achievable: mesh or ac+ap
There are only two options for a good web experience
What's mesh
Mesh is a product designed specifically for large, unwired families, and he can successfully address the pain of the above-mentioned family network. Deployment is simple and can be facilitated with electricity. And the only weakness of such a good product is the price of good online experience and support for seamless and fast roaming
Mesh distributed circuits generate a web-based network in which different access points can be mixed in asterisks, trees, serials and bus lines. Not only is sid unified in this large network, but wireless devices are free to search for the best signal ap to connect to the transmission data, and the user handheld is seamlessly interconnected when travelling around different aps。
Mesh's rationale, while similar to wireless relays, is very different, better in terms of user experience and better in terms of roaming experience。
Mesh is not only a difference from the general wireless trunking model, but also a difference between network stability. When a mesh node fails, other mesh nodes automatically connect, complement the network and avoid the embarrassment of a network being paralysed。
5. What is the ac+ap model deployment
The initial ac+ap was primarily applied at the enterprise, commercial level, so stability and user experience have always been the direction pursued by the ac+ap programme. In recent years, with the expansion of residential space, ac+ap has become an option for high-demand household users。
The ac+ap model is one of the best in all programs in terms of web experience, not one! However, it is also birthrightly inferior to the need to deploy the grid ahead of time, and most aps are top aps and need to deploy the line to the roof of the shed. This hinders the pace of use by many household users, so a prerequisite for using the ac+ap programme is that the house is just ready for renovation and that the family network is planned in advance
Here are some of the highlights of ac+ap:
(1) the biggest pit of ac+ap is expensive, and the sum of the money on the wire is a significant expense
(2) don't consider the price of ap alone. Sometimes an ac price will drive you crazy, and g. O. P. E. Will cost you money
(3) ac+ap is only wireless coverage, and you need a main route to connect to broadband, preferably using soft route
(4) the use of ap usually uses poe power, so first you need a poe switch, and second you need to make sure that your ap-supported standard poe power supply is available
(5) use top aps as far as possible, so that top aps can also be attached to the wall sideways. Type 86 panel ap has a low signal coverage, a large heat flow, and a bad heat spread
(6) with regard to ap interface parameters, the owner of the building found a number of tps and fast-end low-end aps, wifis, and the wan mouths, which are so bad。
(7) ap can be controlled by soft ac and save an ac expense. (ps: avap can be controlled by soft route, tp also has an iac controller, ubnt direct computer software)
Iii. Selection of pit avoidance products
After the above attention, let's say the following:
1 based on chip route
We're talking about high-end products that basically use broadcomm's chips, mainstream valor, web, lInksys are basically brainless
Rt-ac66u b1, rt-ac68u b1, rt-ac1900p, ac86u, ac88u, rt-ac5300
Web-based netgear series: r7000p, r8000r8000p
LInks series: ea7500, ea8300, ea9300ah
Also, the owner recommends mt76xx series of mtk swipeables: fiji k2p, newifi3 and polar route 3
2. Soft route recommendations
Whether the owner of the soft-circuited building is recommending the purchase of the machine, the purchase of the j1900 or the d525 processor, or the memory of the 4g
3. Mesh product recommendations
So far, the three main mainstream producers have had a good experience of mesh products, namely, development, obir and amplifi
4. Ac+ap product recommendations
The owner of the ac+ap programme building mainly recommends the use of fast and ubnt products. Love speed is expensive and can play with soft routing. Ubnt users experience doing the best, are stable, and the disadvantage is too expensive. A common feature of both products is the fact that there is no need for an ac controller, which can save money。
Iv. Context
That's all i'm saying. I'm sure it'll help your wifi system
