LTE Multi-UE Simulator Bus Traffic Congestion Prevention
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Solution Overview
Problem
LTE multi-user equipment simulators experience traffic congestion and data corruption due to bus collisions when multiple modules within the simulator node simultaneously transmit data over a shared bus, leading to reduced throughput and corrupted signals.
Innovation Solution
A method is implemented where a first module transmits LTE subframe signal portions at the beginning of a transmission interval, sends a trigger signal upon completion, and the third module forwards decoded control information during an idle time period defined by the receipt of the trigger signal and the start of a second transmission interval, coordinating signal traffic to prevent collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple modules within the simulator node simultaneously transmit data over the shared bus, then the data transmission capacity is improved, but bus collisions occur causing traffic congestion and data corruption
Solution Approach 1:
The data transmission is segmented into distinct time intervals (first transmission interval, idle time period, second transmission interval) with clear boundaries marked by trigger signals. This segmentation allows multiple modules to transmit data in an organized sequence rather than simultaneously, preventing bus collisions while maintaining high data transmission capacity.
Solution Approach 2:
The first module sends a trigger signal indicating the completion of data transmission before the second module begins its transmission. This preliminary action allows the second module to prepare for transmission during the idle time period without causing collisions, as the bus is already clear of the first module's data.
2Productivity
If multiple modules transmit data over the shared bus at the same time, then the throughput is increased, but traffic congestion occurs reducing overall efficiency
Solution Approach 1:
The system uses periodic transmission intervals separated by idle time periods. Each transmission interval is followed by a trigger signal and an idle period, creating a rhythmic pattern of data transmission. This periodic structure allows the bus to be fully utilized during transmission intervals while providing necessary pause periods to prevent congestion.
3Device complexity
If the system uses a shared bus for inter-module communication, then the device complexity is reduced, but bus collisions cause data corruption
Solution Approach 1:
The trigger signal acts as an intermediary between the first module and the second module. It mediates the communication by signaling when the first module has completed transmission, allowing the second module to safely begin its transmission without causing collisions. This intermediary mechanism maintains signal integrity while using a simple shared bus architecture.
Data Source
AI summary
Methods, systems, and computer readable media for preventing traffic congestion in a long term evolution (LTE) multi-user equipment (multi-UE) simulator device are disclosed. In one example, a method includes transmitting, from a first module to a second module over a shared bus, one of a plurality of LTE subframe signal portions at the beginning of a first transmission interval. The method further includes sending, from the first module to a third module over the shared bus, a trigger signal upon completing the transmission of the LTE signal portion. The method also includes forwarding, from the third module to the second module over the shared bus, decoded control information associated with at least one of the plurality of LTE subframe signal portions during an idle time period defined by the receipt of the trigger signal and the beginning of a second transmission interval.