Welotec TK800 Smart City LTE/Wi-Fi/GPS Router

Smart City
LTE router for the transportation sector

Communication solutions for public transport

This digitization megatrend is increasingly becoming a part of our cities. Especially public transport as part of a "smart" city needs to become more efficient through the use of modern communication systems. Our TK800 Router provides operators and system integrators in the transport sector with a mobile platform both on-track and off-track that is perfectly adapted to the needs of the individual applications.

In addition to the required certifications for the bus and rail industries, which underline the robustness and longevity of these LTE routers, our TK800 Router offers numerous additional features that open up completely new application areas and considerably simplify the use of communication solutions for our customers.

Together with you, we can create a complete tailor-made communication concepts for your desired application.

Smart City LTE Router Brochure

For more information on the Smart City LTE Router TK800, as well as useful information on matching antennas and industrial computers can be found in this brochure.

Application Examples in the Smart City Area

Bus and Train
In the future, public transport needs to play a bigger role if we want to take the protection of climate and residents more seriously. To do this, the existing structures must become more efficient and tailored to the passenger. Through infotainment solutions or mobile ticketing, the driving experience can be made considerably more comfortable while new user groups can be addressed and additional business potential can be raised. For all these advantages; however, not only a communication connection of buses themselves, but also of stops or charging infrastructure is necessary. We are always working to develop new applications for our routers. Here is a selection of those in which they have already been tested and proven effective.

Digital Signage
In public transport, the so-called infotainment is becoming increasingly common ̶ e.g. weather or latest news updates displayed on the screen. They are also popular as advertising space. In this application, larger amounts of data in the form of video and images must be transmitted over the cellular network. The routers of the TK800 series are connected to the displays via Ethernet. Through LTE, a VPN tunnel is established to the control center. From there, new content can be

The image content required for infotainment is transmitted and displayed via the mobile radio network and the router connected to the display devices in the transport. Since (moving) visuals are used, the transmission speed requirements are high. Therefore, some public transport companies are on their way to upload content to the individual systems at the bus depot. Therefore, the W-LAN chipset in the TK800 router is used and thus drastically reduces data consumption.

Welotec TK800 Smart City LTE Router - Bus Applications

Passenger Information Systems
A passenger information system is an electronic information system for both local and long-distance public transport passengers. It goes beyond the mere timetable information. The aim is to offer the passengers an information platform that enables them to obtain comprehensive information about local public Transport. Inside the vehicles, an information about bus routes as well as the following bus stops and the final destination is provided simultaneously through loudspeakers or displays.

LTE routers are also used at stops and stations to connect and allow communication between information points or digital timetable displays. Wi-Fi routers are also used as information systems for the drivers by enabling the drivers to use Wi-Fi at the bus stations and thus, for example, access their work schedules.

Video Surveillance
Video surveillance in public transport is designed to meet the needs of passengers for safety by preventing or quickly identifying the crime. For this application, a sufficiently fast communication link between the means of transport and the control room is required. Some of the footage needs to be transferred in real-time in response to critical situations. The TK800 series routers are connected to the IP cameras via Ethernet. Through LTE, a VPN tunnel is established to the control center. From there the images from the surveillance cameras can be viewed. Usually, a video server is used on board the bus or train equipped with camera systems. Here the images are stored for a certain period of time and can be accessed upon request. Often you will also find an alarm button close to the bus driver, which triggers the switch to the live image in the control room. The operator can thus see the situation at a glance and take action directly.

Welotec TK800 Smart City LTE Router - Equip bus fleets

People Counting
Data from a passenger counting sensor can be recorded via a serial interface and written with the position data of the GPS system in a file (CSV). Via LTE, this CSV file can be sent via FTP to a server. At the control center, this data can then be evaluated to adapt bus routes to the number of passengers in certain parts to offer customers an improved range of routes.

Traffic Control Systems
Private transport, such as cars and trucks, also needs to be managed more efficiently. For this purpose, digital display bridges at important junctions are used, which warn the drivers of current dangers, speed limits or overtaking bans. This avoids congestion and allows early warning of dangerous situations. One form of traffic control systems is e.g. parking guidance systems, which indicate free parking spaces in the parking lot in an urban area.

Our TK800 LTE routers are responsible for the transmission of control signals for the use in these traffic management systems. In order to make this important and critical application possible, large-temperature industrial routers and appropriately designed antenna systems, which we supply to various system integrators, are required.

But not only LTE routers are used in this application, in the past and by now, UHF radio systems are also used once again. This is because the mobile network is often not so fast during traffic jam due to many participants. Therefore, some system integrators also build their own UHF radio networks with our products for this application.

Charging Infrastructure
The charging infrastructure for electric vehicles is currently under construction all over Germany. For billing and monitoring purposes, each individual charging station must receive a communication connection. Since cabling is often very uneconomical, our customers use the LTE routers and (vandalism-proof) antennas.

Welotec TK800 Smart City LTE Router - Charging Infrastructure

Stationary Video Surveillance
In the era of anti-terrorism and increasing security needs for the people, video surveillance systems play an important role in clearing up any crime. When used correctly, it can be used to achieve deterrent effects and increase the level of awareness. Often, these video surveillance systems are set up at major transportation hubs, as there are often many people here. In this application, our LTE routers ensure a secure connection of the IP-based cameras to the monitoring center in which the images are stored or evaluated. There are also systems with their own stationary control center, which cache the images and provide them when needed. For this, we provide appropriately equipped industrial PCs (also available with PoE ports).

Stationary Ticket Machines
Ticket machines are available in many areas of public sphere. In addition to the obvious applications such as at bus stops or in the train stations, these are also used in multi-storey car parks or other restricted areas such as ski lifts or the like. In these cases, cable installation and connection to the fixed network are usually not the most economical solution. That's why many of our customers use TK800 series LTE routers in combination with vandal-proof antennas.

ID-based Ticketing
With ID-based ticketing, all ticketing processes are carried out invisibly in real time in a cloud for the customer. The data on e.g. passenger, ticket and tariff, is stored in the operator's background system when the passengers board and disembark, without the customer actively participating in the process. During this process, our routers transfer the data to the control center with secure encryption.

Welotec TK800 Smart City LTE Router - bus and rail certifications


Certifications, such as ECE certification, are the essential thing for operators and system integrators, especially for the on-track sector; i.e. within buses and trains. These certifications prove that the products are suitable for the challenging application in traffic vehicles. In addition to the vibration resistance of the individual components, the temperature range, the electromagnetic compatibility and other technical details are examined, which aim at the longevity and the robustness of the components.

With numerous customer applications both in buses and trains as well as in stationary applications, we have a broad portfolio of certified LTE routers and public transport antennas.

In addition to some "standard" certifications such as the CE mark or approvals for different countries and regions, there are two main test marks for the public transport sector: the ECE test mark and the EN 50155 standard. Our TK800 routers meet all the requirements for the challenging use in on-track applications, which we underline with the relevant certifications.

ECE Test
The ECE certification mark, also known as E-mark, agreed by the Economic Commission for Europe (ECE) is a certification of components and assemblies of motor vehicles. Controller and communication hardware must meet the specific needs of mobile applications. Strong and consistent vibrations, voltage fluctuations or extreme temperature fluctuations make the use of electronic components difficult. Only robust devices such as the TK800 Router can be used here. To ensure the suitability, the router received the ECE certification.

EN50121-3-2 & EN50155
In rail vehicles, the stresses of the individual components are even higher while fire protection regulations must also be complied with. In order to meet these requirements, equipment used in rail vehicles must comply, among others, with the EN 50155 standard. Some models of the TK800 series have therefore undergone extensive testing to prove their suitability for rolling stock.

Welotec TK800 Smart City LTE Router - Mobile Phone Features


LTE for Maximum Network Coverage
The TK800 series routers are available in both LTE and UMTS versions. With LTE, the fourth-generation mobile standard, you can achieve higher speeds and lower latencies. However, the more important thing is the better network coverage, especially in rural areas, by the providers. The use of diversity or MIMO antennas also ensures better reception and higher data throughput rates.

All routers are downward compatible to the mobile radio standard. Thus, the LTE / 4G variant supports 3G (HSPA +, HSUPA, HSDPA, UMTS) and 2G (EDGE, GPRS, GSM). If the network with the highest standard is not available or the reception is too weak, the system automatically switches to the next best network.

Higher Availability through Dual-SIM
With two SIM cards from different mobile service providers, you can increase the availability of your application. When a provider's network becomes unavailable, the router automatically switches to another network using the second SIM card. Vehicles that require a change from one cell to another (roaming), therefore benefit from dual-SIM. But even in rural areas with less network coverage, the use of a dual-SIM LTE router increases availability.

Dual APN - Separation of Data
Two virtual networks within the mobile network; each with its own IP address space can be a separation of different data. Dual-APN significantly increases security when communicating with multiple users via a router. For example, the operator of a passenger information system can access this system exclusively, even if further applications such as ticketing systems or video surveillance systems are connected to the router.

Welotec TK800 Smart City LTE Router - GPS and Wi-Fi Features


Positioning Systems
For some applications, a precise position of the vehicle is needed. For example, a self-sufficient passenger count requires the position data in order to allocate the number of passengers to or from the individual stops. The GPS signal can also be used to create an accurate timestamp. Some models of the TK800 series therefore have a GPS chipset.

In addition, the so-called dead reckoning can be used when the GPS reception fails, for example in tunnels or under roofs. An acceleration sensor on the GPS module and the last known GPS position are used to calculate the current location of the vehicle. This is a decisive advantage, especially in densely built-up large cities as it ensures precise determination of the coordinates of the vehicle. The two maps show the differences in a densely built-up city. In the picture on the left you can see the positioning via a normal GPS chipset without dead reckoning, while in the picture on the right, the positioning with dead reckoning is much more accurate, since not only the GPS signal is used.


Data Transfer at the Depot
The TK800 routers are LTE routers that are used in buses for different purposes. In addition to the LTE interface, the routers also have a WLAN access point, which allows maintenance personnel to access the connected IT devices. This means, a data transfer at the bus depot can be carried out. For example, the contents of the infotainment system can be uploaded at night at the bus depot via the WLAN interface without taking up the data volume of the SIM card.

IEEE 802.11b/g/n
The LTE WLAN routers support the WLAN standard IEEE 802.11b / g / n with WPA2 encryption and can be operated as a WLAN client or WLAN access point. In client mode, the router can dial into the internet via a WLAN access point, in which case the LTE mobile connection can be used as a backup link. Used as a WLAN access point, the router can be connected to the WAN network via LTE or wired.

LTE Router Virtual Private Network VPN

Virtual Private Network

Flexible VPN Options
Stable VPN connections are very high in the catalog of requirements of most public transport companies or similar. In the details, however, the requirements differ. The TK800 series has many VPN options and thus adapts perfectly to your IT concept.

OpenVPN is a free software for building a Virtual Private Network (VPN) via an encrypted TLS connection. For encryption, the library OpenSSL is used. OpenVPN uses either UDP or TCP for data transport.

The TK800 LTE routers support Internet Protocol Security (IPsec) site-to-site VPN and Internet Key Exchange (IKE) protocols in the IKEv1 & IKEv2 versions.

Dynamic Multipoint VPN (DMVPN)
With Dynamic Multipoint VPN (DMVPN), you can create scalable IPsec Virtual Private Networks (VPNs) with centralized architecture. In large networks, you can also significantly simplify the implementation and its administration.

Welotec TK800 Smart City LTE Router - Cyber Security


The TK800 series has a built-in firewall with high security requirements. In addition to Stateful packet inspection (SPI), the router also supports access control lists, intrusion protection IP / MAC binding and much more.

Authentication, Authorization and Accounting (AAA)
Highest security with intelligent AAA management. The device is able to use local and server-based AAA solutions such as TACACS +, RADIUS and more for authentication.

Next Generation Encryption (NGE)
Next Generation Encryption incorporates the best cryptographic algorithms in security and scalability that can be implemented today to ensure network security over the next few years. TLS1.2 with PFS, AES 256, AES 384, IKEv2, and SHA256 provide the LTE TK800 series Router with the strongest security standards for IT infrastructures.

Welotec TK800 Smart City LTE Router - Interfaces


Ethernet Connectivity
The Ethernet interfaces are used to connect different subsystems in buses. These can be; e.g. cameras, ticketing systems, on-board computers or infotainment solutions. In the future, Ethernet connectivity in buses will become more and more important due to EN 13149 and the resulting communication concepts like ITxPT or VDV 301.

The TK800 LTE Router is available in different hardware versions. For smaller applications, the version with two Ethernet ports is commonly sufficient. For applications that require higher connectivity, the version with integrated 5-port Ethernet switch is provided. In all versions, the ports are designed as Fast Ethernet RJ45.

Serial Interfaces
Older, existing components can be connected via the serial RS-232 or RS-485 interface. This allows existing devices to continue to use and increase the cost of retrofitting.

Digital Inputs and Outputs
Other interfaces include a digital input and a relay output. For example, with the relay output, the heating systems, air conditioners or other devices inside the bus can be turned on at the depot via a remote access even before operation. Therefore, the transport vehicles are ready before the route starts. Via SMS commands or integrated logic within the router, the digital output can be controlled accordingly. Sensors, such as a door sensor, can be connected via the digital input. The serial interface can also be used to integrate additional sensors or I/O.

Welotec TK800 Smart City LTE Router - Software Features


Connection and Application Monitoring
High availability of the connection and thus the reliability of the application is ensured by extended watchdog, connection and application monitoring functions:

  • Embedded Hardware Watchdog for automatic recovery of the system in case of errors
  • PPP Layer Detection - Check the mobile connection
  • Network Verification (ICMP) - Verify Internet and network connections
  • VPN tunnel verification for a reliable VPN connection
  • VPN tunnel end-to-end monitoring (ICMP) - For checking the data connection in the VPN tunnel
  • Shutdown of functions and interfaces to harden the system

Configuration via Web and CLI
An intuitive web interface is available to configure the TK800 routers. Network administrators, on the other hand, usually prefer the text file based configuration in the CLI (command-line interface). The TK800 Series CLI makes experienced network administrators feel right at home.

Fully IPv6 Compatible
Large projects must have investment security. In order to ensure future security, we have implemented the first complete IPv6 implementation in the field in cooperation with the major mobile network operators and a module manufacturer. The result of this effort is a router that controls IPv6 over LTE including SLAAC, DHCPv6 and DHCPv6-PD.

Private Python applications
The TK800 Router can store user-specific scripts that enable signal processing in the router. For example, data from a passenger count sensor can be collected via the serial interface, written together with the position data of the GPS system in a CSV file which then be sent via FTP via the LTE network to a server. With the development environment, you can thus easily implement the pre-processing of signals in the field, the so-called EDGE-computing, and thus enable simple stand-alone applications without the need for a controller or the like.

Welotec TK800 Smart City LTE Router - Hardware Features


Robust Metal Housing
According to the industrial requirements, the electronics are installed in high-quality metal housings in order to effectively protect the devices against external influences. The operating temperature range of -25 °C to +70 °C allows the use in demanding and harsh environments. In addition, there is a high electromagnetic compatibility according to EN 61000-4. The TK800 is ideal for the use in challenging industrial environments. The LTE router has a DIN rail mount on the back for installation in the control cabinet.

Specially selected components and effective thermal management enable high Mean Time Between Failures (MTBF) in the field and a long service life, thus guaranteeing higher reliability and lower maintenance costs.

Smart City Antennas

Radio technology is just as good as the antenna that receives or transmits the radio signals. In many cases, the antenna technology is neglected and would be considered at a later stage during the project planning.

Nowadays, public transport companies are faced with very specific challenges: they have to deal with a larger volume of passengers, improve the efficiency and safety of the system and reduce operating costs - all with fewer and fewer resources.

A reliable wireless network that supports data, voice and video transmission provides an effective solution. Robust antennas are essential components in this network architecture. Antenna technologies are designed to significantly increase the volume and speed at which data is transmitted while improving connections to the central network over LTE, WLAN and GPS / GNSS networks.

Welotec Smart City Industrial Computer

Smart City Industrial Computer

Smart cities promise people many benefits. From intelligent parking guidance systems via the networking of public transport to the energy-efficient control of private transport, many data are to be collected and processed here in order to make life in the city more pleasant.

Fast and reliable data processing therefore plays a central role in the city of the future in collecting, analyzing and using this information, often under adverse environmental conditions. Industrial computers are therefore also the ideal smart city computers for permanent use at stops, video surveillance or controlling charging stations for e-mobility.

Reliability at all levels of information processing is a key element to the success of livable cities and communities, and our Smart City computers provide the ideal platform for projects in the world of tomorrow.