Multi-Carrier D2D Control Information for V2X Data Rate
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently configuring and controlling carriers for device-to-device direct communication, particularly in achieving high data rates and reliability, especially in scenarios like Vehicle-to-Everything (V2X) communications where single-carrier data transmission may not meet target data rate demands.
Innovation Solution
The method involves using a multi-carrier communication system where a transmission User Equipment (UE) transmits data and control information through multiple carriers, with the first control information including indicators for multi-carrier transmission, transmission UE identifier, and synchronized transmission timings, and the reception UE receives and decodes data across these carriers, optimizing resource allocation and transmission efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If single-carrier data transmission is used in D2D communication, then system complexity is reduced and ease of operation is improved, but data rate performance deteriorates and cannot meet target data rate demands in V2X scenarios
Solution Approach 1:
The patent segments the data transmission across multiple carriers (first carrier and second carrier) instead of using a single carrier. The transmission UE divides data into multiple parts and transmits them simultaneously over different carriers, thereby increasing the overall data rate while maintaining operational simplicity through standardized multi-carrier protocols.
Solution Approach 2:
The patent transitions from single-carrier (one-dimensional) to multi-carrier (multi-dimensional) transmission by utilizing multiple frequency resources simultaneously. This dimensional expansion allows the system to achieve higher data rates by parallel transmission across multiple carriers without proportionally increasing system complexity.
2Productivity
If multi-carrier transmission is implemented to improve data rate performance, then productivity is improved, but device complexity increases due to multiple carriers and control information management
Solution Approach 1:
The patent merges the control information for multiple carriers into a unified first control information structure transmitted on the first carrier. This control information includes resource allocation for both first data (first carrier) and second data (second carrier), thereby reducing the number of separate control messages and simplifying the overall system complexity despite using multiple carriers.
Solution Approach 2:
The first control information serves multiple functions simultaneously: it provides resource allocation for the first carrier, resource allocation for the second carrier, and coordination information for synchronized transmission. This multi-functionality reduces the need for separate control mechanisms and minimizes device complexity.
3Reliability
If synchronized transmission timings are used across multiple carriers, then reliability is improved through coordinated transmission, but device complexity increases due to timing synchronization requirements
Solution Approach 1:
The patent establishes synchronized transmission timings in advance through the first control information, which includes timing coordination parameters for multi-carrier transmission. By pre-configuring the timing relationships between carriers, the system achieves reliable coordinated transmission without requiring complex real-time synchronization mechanisms during actual data transmission.
Data Source
AI summary
The present application discloses a method for transmitting a signal by a transmission terminal using direct device-to-device communication in a multicarrier communication system. Specifically, the method comprises the steps of: transmitting first data and first control information for the first data to a reception terminal via a first carrier; and transmitting second data and second control information for the second data to the reception terminal via a second carrier, wherein the first control information includes multicarrier-related information indicating at least one among an indicator indicating whether transmission is multicarrier transmission via the first carrier and the second carrier, an identifier of the transmission terminal, and an indicator indicating whether transmission timing of the first carrier and transmission timing of the second carrier coincide.