WiFi expansion interference problems wait to be solved

A few big operators are Shanghai lifted a stream of wireless network set up a hot, WiFi for smart phones and tablet computer users, can from anywhere online natural is a good news, but some doubt, the main fear is that signal a crash, interference other communication. Remind: insight in meet the WiFi omnipresent era before, supervision must be synchronous follow-up.

Recently, a few big operators accelerate WiFi enclosure, preempted wireless Internet market intention has very clear. Moved and unicom all have large scale expansion plan, and WiFi Shanghai telecom is revealed, three years in Shanghai, the WiFi hot spots (equivalent to the total base station) will reach 20000, is now a 4.5 times. Taken together, in the next few years, the city most of the city center area will be WiFi signal coverage, become "wisdom" a sign of the city.

But anonymous experts told reporters, use WiFi radio spectrum and many other equipment overlap. Has not been popular in, because WiFi low power, the scope affected small, temporary impact won't test; Once the broad cover, interference is cannot ignore.

WiFi is is the interference of history. It's the job of the band is 2.4 G Hertz, precise, is 2.4 G to 2.4835 G. The international telecommunication union regulation, worldwide, this is an open frequency band. Open to popularity. 2.4 G band on light regulation gave birth to the atmosphere, such as wireless router, cordless telephone, wireless mouse, bluetooth headset a large number of consumer electronic products. But at the same time, many scientific research, medical treatment and industrial control equipment also choose the 2.4 G, for example, sports timing system, subway signal control, medical care equipment, etc.

Before, in some important occasions, regulators to 2.4 G band will exert special control: Beijing during the Olympic Games in a field of severely WiFi Internet; To ensure safety, the subway aspects issued a radio regulations; And in the hospital ward, the phone is already common sense.

Experts told reporters that this "case type" regulation, maybe it is difficult to face the situation. Mass spread out WiFi Overall, the domestic to the lack of standardized management, WiFi. To do is loose, open, and precise and effective regulatory challenges, not small.

Precise supervision, must want to master large amounts of data. WiFi popularity could probably make the electromagnetic environment of the city qualitative change happen, but what exactly how to change, to be scientific revealed. According to information, at present, WiFi and other equipment room is not fully the electromagnetic compatibility of the evaluation, interference distance, interference degree, which devices will be affected, deserves further study.

Regulation is not merely to limit WiFi. In fact, WiFi deployment, not only harm if disorder ", "will" harm ". Usually, a few WiFi base station if too close, have to fine-tune frequency, each let step; But like peak subway crush hard to turn, when WiFi, especially as different operators of WiFi signal together in frequency "move STH" space is very limited. In fact, had ambitious plan to build the city of Taipei "wireless", because can't solve WiFi self interference, the network quality is not high. And as we have learned, in Shanghai city, and there are some families appeared on WiFi and deploy operators mutual interference.

The personage inside course of study expresses, the long term, the government should come forward to cross the coordination for frequency, operators will rule the distribution. At the same time, to explore the operators to share a WiFi transmitting equipment, it can reduce redundant construction, avoid interference, the more can reduce the probability of influence other radio system. Technically, sharing completely feasible, to solve is the operators of the model between into.

Relative to character, WiFi the effects of radiation on health is not outstanding, because the signal power usually less than 1/10 of the mobile phones than some cordless phones, even lower. But also have experts point out that, considering the past there have been a few units violate compasses deployment of high-power WiFi base station, therefore, in this round of "WiFi hot" approaching, relevant departments should also make strict eia system operators, let common people using at ease, and relieved.