According to the CTIA-The Wireless AssociaTIon, the United States has about 321 million Wi-Fi-enabled devices such as smartphones, laptops and tablets, which is more than the current population of about 315 million in the United States; It does not include about millions of Bluetooth and ZigBee devices that also use the 2.4 GHz band.
Therefore, this may create a general problem - signal collisions between various devices, causing the application of wireless devices to slow down. However, through a new software technology called GapSense, it is expected to avoid wireless device signal transmission conflicts and overcome signal interference problems in the same frequency band.
At the 2013 IEEE International Conference held in Italy this week, Kang Shin, a professor of electrical engineering at the University of Michigan in the United States, presented a general agreement in his paper entitled "GapSense: Lightweight CoordinaTIon of Heterogeneous Wireless Devices". Pulse energy and gaps in the 2.4 GHz band can be monitored to reduce signal interference by 88%.
"There is no direct communication between the various wireless devices because they use different protocols," Kang Shin said. This may be why the increasingly diverse world of wireless devices has become confusing.
Even among 2.4GHz wireless devices that already use the Carrier Sense Multiple Access (CSMA) protocol, signal collisions are still common when listening to radio silence before transmission. The problem is that there are so many devices in progress that each device has a different time delay between listening and transmitting. Therefore, even though they use the CSMA protocol, interference is unavoidable because there are different time delays before being transmitted to a clear channel.
In fact, even in terms of general Wi-Fi traffic, the researchers estimate that it may cause about 45% of wireless data transmission interference. However, according to the test results released by the researchers, this wireless transmission data interference can be reduced to less than 8% by using the GaapSense method.
Kang Shin, a professor of electrical engineering at the University of Michigan, developed the new GapSense software to solve the problem of signal interference between different wireless devices operating in the same frequency band.
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