Accsoon has been granted a US patent for its Dual-Band wireless video transmission technology. This technology was first introduced in the CineEye 2 Pro model in 2020 and has since been further developed in subsequent models.
The Dual-Band WiFi-based system is claimed to offer better range and superior interference rejection compared to competing products.
According to Accsoon, competitors have started using the term ‘Dual-band’ in their marketing when in fact they are referring to a system that switches between two incoming signals, not using both simultaneously and then recombining them. A tell-tale giveaway is if the transmitter and receiver lack the four antennas required for the Accsoon system. These four antennas are the foundation of a stable and interference-resilient Dual-Band WiFi wireless video solution. It also needs to be made clear to users that Accsoon’s patented Dual-Band technology has not been licensed to any of these competitors.
How does the Dual-Band Technology work?
Conventional WiFi systems suffer from excessive latency and are vulnerable to interference. No matter how well a conventional WiFi connection is implemented, in a complex wireless environment it will always be subject to interference – and this is where the Accsoon Dual-Band patented technology steps in to solve things.
There are two common frequencies WiFi operates in: 2.4GHz and 5GHz. The 2.4GHz frequency has a longer wavelength, giving it better reflection and penetration on surfaces and walls, but with a lower data rate. The 5GHz band has much more bandwidth due to the use of a much shorter wavelength, but these higher radio frequencies have a shorter range and are easier to obstruct. Domestic and office WiFi routers commonly use a ‘combine’ or ‘merge’ feature to optimise performance. When near the router a device automatically adopts the 5GHz connection, while at greater distances the connection might be better over 2.4GHz. The device will judge and switch to 2.4GHz for a better internet connection automatically. These techniques do improve wireless performance but still do not solve the problem of interference.
In 2019, Accsoon’s engineers were determined to solve this conundrum. Their solution was to send a simultaneous connection on both bands at the same time.
Essentially, the Accsoon Dual-Band system takes the same video frame and sends it on both 2.4GHz and 5GHz frequencies at the same time. The receiver is also set to receive both at the same time. Because of the physics of radio waves it is hard for any single interference source to influence two connections on different frequencies distributed quite far apart. By sending the same information on two bands simultaneously, the chances of both being over-crowded and subject to excessive interference becomes very low.
To make this all work requires four antennas – for the same reasons that advanced domestic and office MIMO routers now also have multiple antennas. MU-MIMO (Multiple User – Multiple Input Multiple Output) greatly improves the quality and channel capacity of the wireless connection. To leverage the benefits of MIMO a device will need at least two antennas for one band wireless connection, so to use MIMO on both 2.4GHz and 5GHz connections mandates the use of four antennas.
