On September 11, 802.11n standard already been passed, has become Wi-Fi standard of 100Mbps and higher speed. Whether you hail or send out to this ” Why use for such a long time ” Sigh with deep feeling,have while suring you by reason that is one’s own.
After all, IEEE has finished this standard finally in seven years. A what is called one ” Before the standard ” The products have already gone on the market as far back as 2007. In fact, some wireless manufacturer’s reports claim, its one that sells products at present is for the most part 802.11n apparatus before the standards.
Special topic: 802.11n wireless network chooses and disposes the complete attack strategy
This surprising achievement is unquestionable. This standard will probably become the leading network technique in enterprises in the wireless technical field.
First of all, as to participating in several hundred experts of wireless trade and other trade that have made the details of various fields of this standard over the past five years, we should express thanks.
In this course, the formulation work of the standard is not light frequently. The final edition is that have totally written the final wireless standard of 1997 version again, have introduced a lot of technology of lower floor, has established the technological foundation in foreseeable future for hundreds of millions of wireless users and the whole wireless LAN trade.
Though some other wireless technology is at developing stage at present, but no technology can replace the position of 802.11n in the near future. While 802.11n replaces 802.11b and g progressively, it can still offer with early and standard downward compatibility.
Under many kinds of possible dispositions, 802.11n can offer higher throughput, coverage and dependability, therefore has reduced cost and price effectively.
Implement very much simple course – launches the end and receives the end and place a wireless device respectively, can offer and is up to 150Mbps transfer rate, and the transfer rate of 802.11g can only reach 54Mbps at most. And some more complicated disposition ways, namely 2×2 and 2×3 usually disposed dispose, the transfer rate of this kind of disposition can reach 300Mbps at most, and 4×4 disposes the transfer rate of the way and can be up to 600Mbps all these data are the peak value .
The price of 802.11n products drops by a wide margin, this relates to manufacturing cost of VLSI chip to a great extent, the price level of 802.11n products at present already and the cost of 802.11g has been very nearly the same two years ago.
At present, have already built the adapter of 802.11n in installation in most note-books and a lot of Net surfing one, and the manufacturers of every enterprise layer Wi-Fi system begin to offer 802.11n products.
It is Wi-Fi
The reason why can make such success, the key lies in Wi-Fi alliance sanctioned a 802.11n temporary interoperability specification based on second draft of this standard in 2007.
This specification has been influenced by a kind of idea to a great extent, namely 802.11n had already finalized a text a long time ago, but what we want to buy finally is Wi-Fi, but not any 802.11 or something like that. As to 802.11, no consistency, according with or compatible test, the work will be undertaken by Wi-Fi alliance, and this organization relies on one’s own efforts to already become the most successful employer’s organization since the dawn of human civilization.
In fact, after going through 802.11n early long torment, manufacturer’s groups such as MitMot, TGnSync and WWiSE,etc. have carried on a large amount of politics include technology The internal conflict of the field, the involvement of Wi-Fi alliance is very necessary, the trouble course that can be established to the standard at least brings some quiet and orders.
The one that is similar to this is, 802.11 initial standards finalize a text finally in seven years, so, the temporary specification that Wi-Fi alliance sanctions makes the key factor of success of market as this technology.
In establishing and finishing the time that 802.11n standard needs, developing course in standard of IEEE is to limit the standard throughput, thus realize the best result.
The standard which this kind of standard organization sets up basically has legal effect as IEEE. IEEE has been making great efforts to guarantee the development course of the standard accords with ” Rational course, opening, common understanding are and balanced ” Principle,and be kept at every step yes, ” the appeal right ” .
Certainly, produce standard of result, complain, really is very little really, because time that course need this dawdle, blow by everyone. The majority conflicts internally and is resulted from technological position, namely hope one’s own intellectual property right can be incorporated in the standard, or in order to keep the technological leading position of oneself in the market.
Wi-Fi alliance already declared, the authentication course after revising according to the standard will ” keep interoperability with the present specification ” ,And this specification is still based on second standard draft. Because existing investment has got very good protection, we expect to accelerate 802.11n and make the sure process of dominating the status in the world in this.
Certainly, the reason which causes this result is that almost there is not any substantive modification between the second draft and final edition. The most important problem that the standard solves is the coexistent ability to strengthen standardized product and 802.11 existing products and some other products.
Tags: wireless users, wireless lan, attack strategy