New OFDMA Feature for 802.11ax (WiFi 6) Routers
Higher Transmission Efficiency with OFDMA
OFDMA has been used in LTE for many years, and is now available in 802.11ax for multi-user mode.
With legacy OFDM, each frame is transmitted across the entire channel width. When the transmission rate is low, this causes more latency and jitters and lower the overall efficiency.
OFDMA splits a single frame into groups of subcarriers, and each subcarrier can be sent simultaneously. With multiple access mode, it allows multiple users to transmit at the same time thus improving efficiency and enhancing user experiences in high density environments.
OFDM
OFDMA
802.11ax (WiFi 6) BSS Colouring
In traditional 802.11 Wi-Fi networks, access points are designed to wait and take turns if other signals of the same frequency are detected from adjacent access points. This sharing of a resource, in this case radio frequencies, is called a basic service set (BSS). 802.11ax adds Colouring to the BSS information being broadcast so that APs can use the same channel at the same time without having to take turns. This increases Wi-Fi efficiency, particularly in high density environments.
In the diagram here, AP1 and AP4 are using Channel 1 simultaneously, which normally means they would have to take turns if transmitting information at the same time. However, using BSS Colouring, the 2 APs can now transmit simultaneously without waiting.
An 802.11ax AP using BSS Colouring has the ability to change its BSS Colour if it detects another AP using the same BSS Colour on the same frequency.
802.11ax (WiFi 6) Downlink & Uplink MU-MIMO
Hardware Acceleration
Without sacrificing traffic control features such as QoS, Bandwidth Limit, WAN Budget, Traffic Graph and Data Flow Monitor, Hardware Acceleration enhances performance for:
- NAT & routing connections
- QoS
- IPsec VPN
Hardware NAT & Routing
With Hardware Acceleration and Hardware QoS enabled, the router supports up to 8k NAT and routing connections, and firewall performance reaching 940Mbps on single WAN and 1.3Gbps combined performance on multi-WANs.
Dual WAN (Ethernet + xDSL)
1.6x Faster NAT Performance
with Hardware NAT & Routing
without Hardware NAT & Routing
Single Ethernet WAN
1.3x Faster NAT Performance
with Hardware NAT & Routing
without Hardware NAT & Routing
Hardware QoS
Hardware QoS allows prioritization of applications and services on DrayTek routers, to improve performance of critical applications such as VoIP, conferencing and video streaming, etc. Furthermore, it allows flexible bandwidth allocation to suit business requirements.
Dual WAN (Ethernet + xDSL)
1.6x Faster QoS Performance
with Hardware QoS
with Software QoS
Single Ethernet WAN
1.3x Faster QoS Performance
with Hardware QoS
with Software QoS
Hardware IPsec
While the Vigor2865 series already has improved IPsec performance over the previous Vigor2862 series, with Hardware Acceleration enabled, IPsec performance can now reach 800 Mbps. The first 16 tunnels are automatically accelerated on a first come first serve basis. If any drops out, a new tunnel will be put into the accelerator automatically to top off 16 accelerated tunnels.
2.8x Faster IPsec Performance
with Hardware IPsec
with Software IPsec
802.11ax (WiFi 6) VPN Security Routers
802.11ax (WiFi 6) Access Points
