V2V Sidelink Carrier Aggregation with Common Carrier Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in enabling efficient sidelink communication, particularly in scenarios where mobile devices operate autonomously without network assistance, such as when out of coverage or transmitting large amounts of data, leading to capacity issues in terms of data rate and number of users.
Innovation Solution
The implementation of carrier aggregation techniques in wireless networks, allowing for the synchronization of multiple component carriers for vehicle-to-vehicle (V2V) sidelink communications, which includes the detection and transmission of sidelink synchronization signals to establish common time and frequency synchronization across aggregated carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If mobile devices perform sidelink communication autonomously without network assistance, then communication independence is improved, but system capacity and reliability deteriorate due to limited resources and capacity constraints
Solution Approach 1:
The patent combines multiple component carriers into a carrier aggregation framework for sidelink communication. This merging of multiple carriers increases the available bandwidth and system capacity, allowing autonomous devices to maintain reliable communication without network assistance by pooling resources across multiple frequency carriers.
Solution Approach 2:
The patent introduces time synchronization as an additional dimension for managing carrier aggregation in sidelink. By establishing common time references and synchronization signals across multiple carriers, the system adds a temporal coordination layer that enhances reliability while maintaining autonomous operation.
2Quantity of substance
If mobile devices transmit large amounts of data in sidelink resources, then data transmission volume is improved, but system capacity is reached and performance deteriorates
Solution Approach 1:
The patent merges multiple component carriers into a unified carrier aggregation resource pool for sidelink data transmission. This combination expands the total available bandwidth and system capacity, enabling devices to transmit large volumes of data without reaching the limitations of single-carrier systems.
Solution Approach 2:
The patent changes the system's frequency domain parameters by aggregating multiple carriers with different bandwidths and center frequencies. This parameter transformation allows the system to dynamically adjust total capacity based on data transmission requirements, preventing capacity saturation even when large data volumes are transmitted.
3Productivity
If multiple component carriers are aggregated for sidelink communication, then system capacity is improved, but synchronization complexity increases
Solution Approach 1:
The patent implements preliminary synchronization actions by establishing common time references and synchronization signals before data transmission begins. This pre-synchronization approach simplifies the overall system complexity by setting up coordination frameworks in advance, making it easier to manage multiple aggregated carriers during actual communication.
Solution Approach 2:
The patent introduces synchronization signals and common time references as intermediary elements that mediate between multiple component carriers. These intermediaries provide a unified coordination mechanism that reduces the complexity of directly managing multiple independent carriers, enabling scalable carrier aggregation.
4Speed
If carrier aggregation is implemented in sidelink, then data rate is improved, but resource allocation complexity increases
Solution Approach 1:
The patent creates a universal resource allocation framework that operates across all aggregated component carriers. This multi-functional resource management system handles scheduling, power control, and resource assignment uniformly across multiple carriers, simplifying the complexity that would otherwise arise from managing each carrier separately while enabling high data rates through aggregated bandwidth.
Data Source
AI summary
Embodiments of a User Equipment (UE) and methods for communication are generally described herein. The UE may be configured for carrier aggregation using a primary component carrier (CC) and a secondary CC. The UE may attempt to detect a sidelink synchronization signal (SLSS) from another UE on the primary CC. The UE may, if the SLSS from the other UE is detected: determine, based on the detected SLSS, a common time synchronization for the primary CC and the secondary CC for vehicle-to-vehicle (V2V) sidelink transmissions in accordance with the carrier aggregation. The UE may, if the SLSS from the other UE is not detected: transmit an SLSS to enable determination of the common time synchronization for the primary CC and the secondary CC by the other UE. The SLSS may be transmitted on the primary CC.