PC5 Carrier Aggregation for V2X Sidelink Data Split
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Solution Overview
Problem
Existing technologies lack effective solutions for data split and/or data duplication in PC5 Carrier Aggregation (CA) to support high reliability and high data rate in Vehicle-to-Everything (V2X) sidelink communications.
Innovation Solution
Implementing systems and methods for configuring, activating, and deactivating PC5 CA to facilitate data split and data duplication, utilizing multiple Component Carriers (CCs) for sidelink reception and transmission, and enhancing sidelink user plane setup and maintenance to achieve high-bandwidth transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PC5 Carrier Aggregation is implemented for V2X communications, then data rate and reliability are improved, but device complexity and protocol overhead increase
Solution Approach 1:
The patent segments the carrier aggregation functionality into distinct components: primary carrier and secondary carriers, with separate configuration procedures for each. This allows the system to achieve high data rates through multiple carriers while managing complexity by handling each carrier independently through structured configuration messages and separate activation/deactivation procedures.
Solution Approach 2:
The patent introduces a new dimension of carrier aggregation configuration by adding RRC signaling messages and MAC control elements that operate at a higher protocol layer. This dimensional addition allows the system to manage multiple carriers without fundamentally redesigning the existing single-carrier operation, thereby improving productivity while controlling the increase in device complexity through layered protocol design.
2Reliability
If data split and data duplication are implemented on multiple carriers, then reliability and data rate are enhanced, but protocol overhead and processing complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring data split and duplication parameters through RRC signaling before actual data transmission. The configuration includes pre-defining which carriers will be used for splitting or duplicating data, allowing the system to achieve high reliability through predetermined redundancy strategies while reducing real-time processing complexity by avoiding dynamic decision-making during data transmission.
Solution Approach 2:
The patent implements data duplication by creating copies of data packets and transmitting them on multiple carriers simultaneously. This copying mechanism enhances reliability through redundancy while the associated protocol overhead is managed through efficient MAC control elements that indicate duplication patterns, allowing receiving devices to identify and process duplicate packets without excessive complexity.
3Productivity
If multiple Component Carriers are aggregated for simultaneous transmission, then bandwidth and data rate increase, but system configuration and management complexity increase
Solution Approach 1:
The patent implements dynamic carrier aggregation where the system can flexibly activate and deactivate secondary carriers based on traffic conditions and channel quality. This dynamic approach allows the system to achieve high bandwidth when needed by activating multiple carriers, while reducing configuration complexity during low-traffic periods by deactivating secondary carriers, thus adapting the system complexity to actual operational needs.
Solution Approach 2:
The patent incorporates feedback mechanisms through MAC control elements that provide real-time information about carrier activation status, channel conditions, and data transmission performance. This feedback enables the system to automatically adjust carrier aggregation configuration, optimizing bandwidth utilization while managing complexity through automated control rather than manual configuration, allowing the system to maintain high productivity with reduced operational burden.
Data Source
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AI summary
Systems and methods for performing carrier aggregation in wireless sidelink communications are disclosed herein. In one embodiment, a method performed by a first node is disclosed. The method comprises: obtaining configuration information related to sidelink data transmission between the first node and at least one second node, wherein the configuration information comprises one or more rules related to carrier aggregation for the sidelink data transmission; and transmitting the sidelink data to the at least one second node on a plurality of carriers based on the configuration information.