Measured along the route. Reviewed by people.
RV organizes waterway segments and carrier strategies.
The Hub Terminal evaluates and executes them locally.
Turn differences along the route into useful evidence
Give different carriers a useful role
01 / WHY A NETWORK ENGINE
As a vessel moves, network conditions change. Choosing a SIM involves considering its plan. On a particular stretch of river, the question becomes which carrier works better there.
We want to consider both together: use different carriers to complement coverage, a suitable plan for everyday data, and route experience to inform the device's choices.
Signal strength, signal quality and connectivity describe the conditions the device is experiencing now.
Link test locations, carriers and actual transfer performance to build experience specific to the route.
Route strategies provide a reference. The terminal considers its current state before adjusting the network.
02 / FROM TESTS TO STRATEGY
Performance can vary between locations on the same route. Beyond a single signal reading, we measure downloads, uploads, latency and jitter, and keep the location of each test.
Tests are grouped by waterway segment and carrier, reviewed by people, then organized into strategies the device can read. This is how the Network Engine builds experience.
EXISTING FIELD RECORDS / 2025291 records in the public reportFirst-generation device · China Mobile 5G onboard tests↗These records come from the existing Yangtze field-test whitepaper. Differentiated route strategies for multiple carriers still require further measurement and review.
Record position, carrier and actual transfer performance.
Assess differences in context to establish a basis for strategies.
Store them in RV by SIM slot and actual carrier.
After matching the segment, use the valid strategy and local device state.
03 / COVERAGE & COST TOGETHER
Plans shape long-term cost; coverage shapes the experience on a particular stretch. Combining two carriers lets a preferred plan handle everyday usage while another SIM complements coverage where appropriate.
Consider cost when choosing plans. Let route strategies guide SIM selection in operation. Each has its role, helping the combination suit your own route.
Suppose SIM A is your everyday plan and has a higher strategy rating on this segment. The terminal continues to use SIM A.
For you: choose plans with your own routes in mind.
Suppose SIM B has a higher strategy rating on the next segment. With valid positioning, confirmed SIM information and the required operating conditions, the terminal switches to SIM B according to the strategy.
For you: a second SIM can help address differences along the route.
Suppose both SIMs have the same strategy rating on the current segment and SIM B is active. The terminal stays on SIM B instead of making an extra switch back to SIM A.
For you: fewer unnecessary network changes.
Operating principle only. A and B are example combinations, not specific carriers or measured coverage. The device does not automatically compare plan prices. Switching SIMs can briefly interrupt the connection.
04 / DATABASE × TERMINAL CODE
RV organizes strategies by location. The Hub Terminal knows where the vessel is, which carriers its SIMs use and the current network state.
Together, they turn a segment's connection strategy into a device operation with prerequisites and result checks.
Associate SIM slots and actual carriers with 100 m mileage references. The same location can hold different network strategies.
The structure supports China Mobile, China Unicom and China Telecom. This describes the data model, not completed field testing of all three carriers.
Explore the RV waterway databaseMatch a valid GNSS position to a segment in the database.
Use confirmed carrier information to find the corresponding strategies.
Compare strategy ratings and apply automatic, 4G or 5G mode as specified by the selected strategy.
Confirm SIM identity, network mode, registration and the data connection in sequence.
No SIM choice is invented when the position is unmatched, the carrier is unconfirmed or no valid strategy is available.
Equal ratings retain the current SIM. If the slot and mode already match the strategy, no repeated adjustment is made.
SIM and mode changes run in sequence, with timeout, failure and recovery handling. Issuing a command is not treated as a completed connection.
05 / BEFORE YOU USE IT
The Network Engine evolves with route experience and data releases.
The database structure and Hub Terminal execution mechanism are in place. The connected RV Yangtze v1.8 database currently uses default automatic policies. Differentiated field-derived route strategies are still being developed.
This page describes the operating approach and development direction. Available segments and strategies depend on the device version and subsequent release notes.
Rules vary by product. Common conditions include signal metrics such as RSSI, connection failures, roaming and data limits. Signal strength is one possible input.
The Network Engine adds location-specific route experience: measured, manually organized carrier strategies become another input to the decision.
Reference: Teltonika RUTX50 official SIM switching documentation ↗Cost is balanced when selecting plans and combining carriers. The device uses valid route strategies to choose a SIM slot and network mode; it does not compare live unit prices or bills.
Two SIMs offer value as a combination. Consider your usual routes, everyday usage and each carrier's coverage when choosing them.
The Hub Terminal supports two SIMs with one active at a time. The Network Engine selects from eligible SIMs; it does not combine bandwidth. A SIM switch reconnects to the network and can cause a brief interruption.
Actual performance still depends on local coverage, network load, antenna installation and plan conditions.
Position matching, strategy lookup, evaluation and execution happen locally on the Hub Terminal using its installed database. Later data releases can add updated route experience.
A locally stored strategy does not guarantee carrier availability. Valid positioning, SIM information and actual network conditions are still required.
Make onboard network choices fit your own route.