Internet users expect to access WiFi any time everywhere, even when ‘on-the-move’ in buses, trains and ferries, for example. Proxim’s mobility technology – FastConnect, enables Tsunami® Point to Multipoint platforms to support a breadth of ‘on-the-move’ applications such as onboard WiFi, CCTV, connectivity for crew and message boards on trains, ferries and buses, to list a few.
When a Subscriber unit (SU) is traveling between wireless network coverage areas, the SU terminates the session with the current Base Station Unit (BSU) and registers with another BSU. The Fast Roaming feature continuously monitors the local SNR (Signal-to-Noise ratio) and Data rate on the SU for all the frames received from the connected BSU. As long as the local SNR and Data rate are greater than the set threshold values the SU does not scan for other BSUs. When the SNR and Data rate breach the lower threshold, the SU scans for a BSU with a better signal strength and when there are multiple BSU options, the SU connects to the BSU with the most robust signal.
Proxim FastConnect™ feature provides MAC level connectivity to the SU that roams from one BSU to another. Mobility takes place across a range of frequencies (2.4GHz, 5GHz) and channel bandwidths (5, 10, 20, 40 or 80 MHz) that are available per configuration. FastConnect supports session persistence through extremely fast handoffs, and the buffering of data during the actual hand off period. This means an application will experience zero packet loss during a hand over from one BSU to the next, a critical feature for applications such as onboard video security, or VoIP sessions.