Vehicle TCU Server Data Rate Beam Selection
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Solution Overview
Problem
In next-generation 5G mobile communication systems, particularly for autonomous driving, there is a challenge in achieving quick and efficient data transmission between the Multi-access Edge Computing (MEC) server and the Telematics Communication Unit (TCU) mounted on vehicles, due to insufficient time resources allocated for uplink transmission and the inability to effectively transmit high-capacity camera and sensor data simultaneously.
Innovation Solution
A server and TCU configuration that determines available data rates and transmission beams based on channel state information and buffer sizes, prioritizing uplink data transmission to ensure timely receipt and processing of control data, utilizing multiple transceivers (LTE, 5G, WiFi) to manage downlink and uplink data efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the TCU transmits high-capacity camera data and sensor data simultaneously, then the data rate increases, but the transmission time exceeds the acceptable latency for autonomous driving control
Solution Approach 1:
The patent segments the data transmission into priority levels: control data (ultra-reliable low-latency communication) and other data (enhanced mobile broadband). The TCU separates uplink control data from other uplink data, allocating specific time resources for each type. This segmentation allows control data to be transmitted with guaranteed low latency while other data utilizes remaining capacity, resolving the contradiction between high data rate and low latency requirements.
Solution Approach 2:
The patent dynamically changes transmission parameters including data rate, modulation scheme, and time resource allocation based on channel conditions and data priority. For control data, the system adjusts parameters to ensure ultra-reliable delivery within strict latency bounds, while for other data, parameters are optimized for throughput. This dynamic parameter adjustment enables the system to meet both high data rate and low latency requirements for different data types simultaneously.
2Reliability
If sufficient time resources are allocated for uplink transmission from TCU to MEC server, then control data can be transmitted reliably, but downlink service data transmission is delayed
Solution Approach 1:
The patent implements dynamic time resource allocation where the proportion of resources dedicated to uplink control data varies based on current channel conditions, data arrival patterns, and service requirements. The base station and TCU continuously adjust the uplink time resource allocation ratio, increasing it when control data priority is high and decreasing it when downlink service data needs are urgent. This dynamic adjustment maintains control data reliability while optimizing overall system productivity.
Solution Approach 2:
The system employs feedback mechanisms where the TCU reports channel state information, buffer status, and data arrival patterns to the base station. The base station uses this feedback to adjust uplink time resource allocation in subsequent transmission opportunities. This closed-loop feedback ensures that control data transmission reliability is maintained while adapting resource allocation to current system conditions, thereby preserving downlink service data transmission efficiency.
3Device complexity
If the TCU uses a single transceiver for both uplink and downlink, then device complexity is reduced, but the ability to transmit high-capacity data simultaneously in both directions is limited
Solution Approach 1:
The patent configures the TCU with multiple transceivers that can operate simultaneously for uplink and downlink communications. Each transceiver is multi-functional, capable of handling different data types and communication modes. This multi-transceiver architecture enables the TCU to maintain high simultaneous data transmission capability while keeping each individual transceiver relatively simple, resolving the contradiction between device complexity and transmission productivity.
Data Source
AI summary
A disclosure of the present specification provides a server for controlling a TCU mounted in a vehicle in a next generation mobile communication system. The server may comprise a transceiver and a processor, wherein the processor configured to perform: determining an available data rate for a combination of a plurality of transmission beams of a base station and a plurality of reception beams of the TCU; receiving, from the TCU, information on an available buffer size of the TCU and information on a downlink service requirement of one or more electronic devices in the vehicle; determining a data rate of downlink data and a first transmission beam of the base station.