Wi-Fi deployment challenges in high-density environments

Wi-Fi deployment challenges in high-density environments

Matching with mobile smart terminals, Wi-Fi seems to be an indispensable technology in people's lives. In fact, more and more devices access the wireless network, especially in the typical application scenarios such as the hotel's conference area, school hall, and lecture hall. The users are numerous and the density is high, which poses a challenge to the deployment of Wi-Fi. A single access point can handle very few concurrent connections, so if there are many users, many access points are needed. But adding too many access points can also cause problems. Wi-Fi is transmitted wirelessly and the available channels are limited. If two access points communicate on the same channel, interference will occur, reducing throughput. This is also the reason why people often cannot provide stable services when Wi-Fi networks are in attendance at large conferences.

Nico Xiaoyun, director of the Solution Division of Uco Wireless China, believes that to handle wireless transmission in dense environments, it is not to add more access points, but to provide more powerful access points. "Wi-Fi is a shared medium, which means that only one device can communicate on the same channel at a time. Imagine that in an environment with multiple clients, this can be difficult. The best high-density access point Multiple antennas and multiple spatial streams are used, allowing simultaneous transmission of multiple clients between the same frequency and different devices, namely MU-MIMO (multi-user multiple-input/multi-output), said Nie Xiaoyun.

In fact, MU-MIMO is one of the important features of the 802.11ac Wave 2 standard. In the market today, wireless devices based on the 802.11ac Wave 1 standard are quite mature. In order to solve the Wi-Fi deployment in high-density environments and further increase the transmission rate, some vendors have started to implement wireless products based on the 802.11ac Wave 2 standard. R&D.

According to Nie Xiaoyun, 802.11ac Wave 2 supports 4 spatial streams, and the access point can handle more concurrent clients for higher throughput. The supported mobile device density is twice that of 802.11ac Wave 1. Above, the converged data rate exceeds two gigabits per second, which is an ideal choice for high-density deployments and is more suitable for the deployment of wireless environments in enterprises.

The newly launched ZoneFlex R710 Wi-Fi Access Point (AP) from Unisys Wireless is a product based on the 802.11ac Wave 2 standard. Nie Xiaoyun told reporters that the ZoneFlex R710 can support up to four spatial streams and 500 concurrent users. In addition, each ZoneFlex R710 access point incorporates Eutel's patented BeamFlex+ adaptive antenna technology to optimize antenna coverage for each user and each transmission infrastructure, thereby enhancing its technical performance.

According to Nie Xiaoyun, the ZoneFlex R710 has four separate dual-band smart antenna arrays that can dynamically create more than 4,000 unique directional antenna patterns per RF, reducing 15dB of RF interference and reducing co-channel interference. Dual-polarized smart antennas also allow the R710 to automatically adapt to changes in the physical orientation of mobile client devices such as smartphones and tablets, thereby maximizing uplink performance and effectively receiving weak signals from mobile clients.

He told reporters that with BeamFlex+ adaptive antenna technology, the ZoneFlex R710 has significantly increased transmission performance and coverage, and provides up to 5dB of signal gain, and the aggregated data rate exceeds two gigabits per second (at 1733 Mbps in the 5GHz band). Up to 800 Mbps in the 2.4 GHz band). In addition, the ZoneFlex R710 is backwards compatible with existing Wi-Fi clients and can be used as a stand-alone Wi-Fi access point or as part of a centralized managed Eutel wireless Smart WLAN (Wireless Local Area Network). At the same time, ZoneFlex R710 is equipped with dual Gigabit Ethernet ports to maximize investment protection when peak throughput is achieved. The ZoneFlex R710 also uniquely supports spatial multiplexing, adaptive antenna switching and transmit beamforming. This means that Wi-Fi performance and reliability will never be compromised. The ZoneFlex R710 uses 802.3af Power over Ethernet (PoE) without the need to upgrade expensive and cumbersome wired switches.

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