Edge Server TCU Latency Reduction for URLLC
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Solution Overview
Problem
Current 4G mobile communication networks face inadequate latency for applications requiring Ultra-Reliable Low-Latency Communication (URLLC), such as autonomous driving, due to high latency in existing core network designs, and struggle to accommodate high-speed services in ultra-wide bands, necessitating a redesign for 5G mobile communication.
Innovation Solution
A server and Telematics Communication Unit (TCU) system with a processor and transceiver are implemented in vehicles, capable of receiving channel state information, generating data rate tables, identifying bottleneck periods, and adjusting data rates to optimize communication between the TCU, base stations, and in-vehicle devices, using multiple communication standards like LTE, 5G, and WLAN.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional cloud server-based network structure is used, then data transmission between base station and server can be established, but latency is too high (30-40 msec) to support URLLC requirements (1 msec or less)
Solution Approach 1:
The patent introduces a multi-access edge computing server as an intermediary between the base station and the cloud server. This edge server processes data locally at the network edge, eliminating the need for data to travel to distant cloud servers and back. The edge server acts as a mediator that handles time-critical processing while maintaining connection to both the base station and cloud infrastructure, thus reducing latency while preserving reliability.
Solution Approach 2:
The patent segments the network architecture into distinct functional layers: edge computing layer (for low-latency processing), core network layer (for management and control), and cloud layer (for heavy computing resources). By dividing the network into these segments with different functions, the system can handle time-critical operations at the edge while maintaining overall system reliability through proper segmentation of concerns.
2Adaptability or versatility
If 4G LTE core network is used, then existing infrastructure can be maintained, but it cannot accommodate high-speed services in ultra-wide bands required for 5G eMBB
Solution Approach 1:
The patent implements a multi-access edge computing server that can handle multiple communication standards (4G LTE, 5G NR, Wi-Fi) and multiple service types (eMBB, URLLC, mMTC) through a single unified platform. This universal server architecture provides multi-functionality, allowing the network to accommodate diverse 5G services including ultra-wide band communications while maintaining compatibility with existing 4G infrastructure, thus enhancing adaptability without proportionally increasing complexity.
3Speed
If data transmission rate is increased to support high-speed services, then service performance improves, but latency and reliability for critical communications may deteriorate
Solution Approach 1:
The patent applies local quality by providing different service quality levels at different network locations and for different service types. The edge computing server prioritizes and optimizes resources for time-critical URLLC services (high reliability requirement) separately from enhanced mobile broadband services (high speed requirement). This localized quality differentiation ensures that high-speed data transmission for eMBB does not compromise the reliability and low latency required for critical communications.
Data Source
AI summary
A disclosure of the present specification provides a server for controlling a telematics communication unit (TCU) mounted in a vehicle in a next generation mobile communication system. The server may comprise: a transceiver unit; and a processor for controlling the transceiver unit. The processor may perform the steps of: receiving information of a first channel state between the TCU and a base station and information of a second channel state between the TCU and an electronic device in the vehicle; on the basis of the first and second channel state information, generating a first table based on data rates of downlink sections among the base station, the TCU, and the electronic device in the vehicle; and transmitting downlink data to the TCU through the base station on the basis of the first table.