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Wireless routers for ITS
Important things to consider when purchasing a wireless router for Intelligent Transportation Systems
Is it a multi-function wireless router?
Currently, multi-function routers are very popular due to their space saving features and cost effectiveness. More and more functions are being integrated into a compact wireless router. For example, Lantech have launched a series of 7-in-1 routers in to the market, which include Wi-Fi, LTE, Storage, PoE, Gateway, VPN and Managed Switch. Reducing the number of devices within a network also reduces the operational and maintenance requirements.
For mobile connectivity, does it provide redundancy?
A router with two built-in 4G LTE modules (up to 4 sim card slots) provides further protection, this also provides a fast recovery time to the network compared to a router with only one 4G LTE module. It allows the possibility to choose different 4G service providers in order to reduce risk when a provider is down ensuring continuation of service.
Make sure it’s secure
Increased network attacks have become a critical issue, especially for ITS networks. Imagine if the ITS network is hacked and an anonymous person takes control of a public transportation system. This is why security is critically important in ITS applications. A firewall is essential and the VPN helps support this by creating an isolated and secure connection.
Input voltage and isolation protection are important
ITS applications cover a wide range of vehicles and services. They all come with different power supply voltages. An ideal wireless router for ITS should be able to work on a vehicle with a 12/24VDC power input and should also be able boost the voltage to 48VDC to supply power to PoE devices such as IP cameras. However, just being able to boost the voltage to the required level is not the full requirement, the router/switch needs to provide isolated power and have built-in surge protection. Without this the router may become damaged due to the unstable power supply from the vehicle system, especially during vehicle starting. Eventually this would cause a loss of service.
Which wireless standard does it support?
Some products are still using the old IEEE 802.11n Wi-Fi standard while IEEE 802.11ac provides faster and cleaner wireless thanks to its dual band ability. The 802.11ac standard has been around for several years already and is well established for industrial applications.
A few suitable switches in the market are listed below:
This multi-function 4G LTE and 802.11ac Wi-Fi router has 3 Giga RJ-45 Ethernet ports, VPN and a dual input range from 9VDC up to 60VDC.
A multi-function 4G LTE and 802.11ac Wi-Fi router with 2 Giga RJ-45 Ethernet ports, VPN and dual input range from 9VDC up to 60VDC.
A multi-function 4G LTE and 802.11ac Wi-Fi router with 6 Giga RJ-45 Ethernet ports, VPN and a built-in 6 Gigabit Ethernet switch.
A Multi-function 4G LTE router with four Giga PoE RJ-45 Ethernet ports and two LAN/WAN SFP fiber ports, VPN and dual input range from 9VDC up to 60VDC.
A Multi-function 4G LTE router with 2 Giga RJ-45 Ethernet ports, VPN and dual input voltage from 9VDC up to 60VDC (24V model) or single isolated power 90 to 305VAC/120 to 430 VDC (HV model).
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