Not polite to say, wi-fi has become now the mass of the necessities of life, you must be experienced in go out to play, go shopping or participating in large meetings, use wi-fi connection network collapse of experience, "slow even without frequency drops," has become the norm, in fact, along with the increase in use wi-fi scene, people are just more and more strict with the experience of wireless network, cable network, after all, already from the previous "wool net" upgrade is now high speed optical fiber network, person, have inertial thinking is understandable,



Wireless network experience poor investigate its reason, or the performance of the wireless network bottleneck still cannot break! So, we hope for the next generation of wi-fi network is more and more high, so, affect the wi-fi performance improvement is the key to what? We think the first is related to network protocols,

Since 802.11 n protocol (2009) was born, to mark the WLAN entered the era of high speed, the bandwidth of the VHT40 configuration, 1 the space flow 150 Mbps, and four largest space relative flow rate of 600 Mbps physical connection had 11 a/g of 54 Mbps have greatly ascend, subsequent release 802.11 ac (2013) is further enhance connection rate, the first is the bandwidth from VHT40 to VHT80 (Wave1) even VHT160/VHT80 + 80 (Wave2), MCS is from 7 to 9 is the highest, which corresponds to 256 qam, therefore the corresponding physical connection rate is raised to 1 the space flow 433 Mbps, and eight largest space flow of 6.97 Gbps in theory, at present the common general practical scenario for 2 space flow of 866.5 Mbps, three dimensional flow 1300 Mbps and four space flow 1733 Mbps, arguably in physical connection level has reached the level of Gbps,

So the question comes, who will be the successor of the 802.11 ac?

Will be 802.11 AD? While 802.11 AD can provide high rate is as high as 7 GBPS, environmental interference are relatively small, but because of its use is 60 GHZ frequency band, the transmission loss is very large, coverage is quite limited, so it is more as a supplement with 802.11 ac product coexistence, according to the development of the IEEE planning route, 802.11 protocol crown prince, the family will be 802.11 ax,

802.11 ax is after 802.11 ac, the further extension of the wireless local area network (LAN) protocol itself, can be as ac after a direct version, named after its initial code for HEW (High Efficiency WLAN), which began in 2013,

802.11 ax design scenario of the initial focus is dense environment, in other words, the initial design will and traditional 802.11 there is a difference, and the design of 802.11 ax is not in the current of ac 802.11 above 160 m bandwidth, new greater bandwidth (is under 2.4 G and 5 G spectrum resources, unable to find a larger bandwidth channel), so named after the agreement HEW, its focus on efficiency, also hope that more effective use of the current spectrum resources, so as to provide a higher rate of actual network,



802.11 if the ax is to solve the wi-fi network related bottleneck "savior", then what does he have a characteristic, able to complete this mission? We simply summarized, mainly because of the following:

1. Excellent anti-interference ability,
802.11 ax puts forward a new space multiplexing technique, can quickly identify anything conflict and retreat through dynamic idle channel assessment and dynamic power control at the same time, more effectively to identify and reduce the mutual interference signal noise, thus improved the at the station, the airport, parks, sports venues, such as high density scenarios wireless experience, it is said that the average throughput can reach 802.11 ac standard 4 times,

2. A higher transmission rate,
802.11 ax the introduction of higher order 1024 qam modulation encoding scheme, compared with 802.11 among the highest in the ac 256 qam, code modulation is more efficient, each 80 m bandwidth connection space flow rate from 433 Mbps to 600.4 megabits per second, the theory of maximum correlation rate (160 m bandwidth, eight space flow) from 6.9 Gbps ascend to 9.6 Gbps, close to 40%, the highest correlation rate

3. More powerful ability of concurrent,
TDD ax TDD by has 802.11 MU - MIMO and has OFDMA technology, with more space flow and fertility carrier to carry the multi-user concurrent transmission, increase the efficiency of the hollow, reduced the application of delay, but also reduce the conflict of the user's retreat, multiple user scenarios provides a better transmission security,

4. The transmission properties of more robust,
802.11 ax support more than 802.11 ac FFT points (4 times the 802.11 ac), narrower sub-carrier spacing (1/4) is only 802.11 ac, longer time 802.11 ac (4 times), is more advantageous to channel estimation and equalization, especially in the resistance to multipath fading and scenarios, such as outdoor environment can play a better performance and stronger robustness,

5. More efficient resource scheduling,
802.11 ax TWT (Target Wakeup Time, Target wake up Time) function, allows devices to mutually agreed between the awakening Time and activity duration, reduce the channel competition, more sleep, reducing power consumption, improve battery life,

6. Good agreement of compatibility,
Ax support both 2.4 802.11 G/5 G Hz two frequencies, lead frame structure is almost the same, can be forward compatible with 802.11 a/b/G/n/ac, completely don't have to worry about massive stock of wi-fi terminal in the age of 802.11 ax elimination,

Faced with such a perfect "savior", you will certainly ask when can I come? Some disappointment, August 16, Broadcom to announce the industry's first 802.11 ax wireless chips, the first 802.11 ax wireless devices have to wait until 2018 to be commercially available... Ah, is you can't eat hot bean curd!

Don't really want to lay down and die, let the disastrous wireless network we suffer from the experience? Actually otherwise, the domestic existing vendors and some key technology will be commercially available, our wireless innovation has always advocated scene, hope that through technology innovation, create a wireless experience to the extreme, at present, we have the most remarkable in 802.11 ax anti-interference characteristics, the import of the current commercial equipment, sharp Czech called Pre - ax technology, and successfully applied in large amounts in high-density deployment scenarios, has been widely recognition and affirmation, in March this year that China and South Korea war, when the audience he long stadium sun exciting sun sun happiness, joy actually 802.11 ax core technology, has been silent and work around them, recently, we have released the 802.11 ax platform based on new product RG - AP860 -i, interested friends can watch, it adopts the 1024 qam modulation TDD coding scheme and has much higher levels of OFDMA technology, through higher transmission rate, the more powerful the concurrent ability and the ability of more efficient resource scheduling, showed a single AP carry 10 GBPS network access rate, no doubt this is the seventh generation of wireless technology, through the large-scale application of commercial road,

Expectation, 802.11 ax is to solve the public wi-fi experience poor "savior",