Sidelink Parameter Propagation Across Carrier Aggregation
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Solution Overview
Problem
Wireless networks face challenges in efficiently managing resources and providing bandwidth and response times due to multiple devices sharing resources, with limitations from communication protocols and hardware bandwidth, especially when operating with both new and legacy protocols.
Innovation Solution
The implementation of carrier aggregation in sidelink communication, allowing user equipment (UE) to select component carriers for transmitting sidelink synchronization signals and physical sidelink broadcast channels, enabling parameter propagation across multiple carriers for synchronization and shared channel transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple devices share the same wireless resources, then resource utilization efficiency is improved, but resource management complexity and response times deteriorate
Solution Approach 1:
The patent segments wireless resources by introducing carrier aggregation with multiple component carriers (CCs), dividing the resource pool into separate carriers that can be independently managed. Each CC handles specific traffic types or QoS requirements, reducing overall resource management complexity while maintaining high utilization efficiency through parallel resource allocation across multiple carriers.
Solution Approach 2:
The patent adds the frequency dimension by aggregating multiple component carriers across different frequency bands. This dimensional expansion allows the system to manage multiple devices and traffic types simultaneously across different frequency resources, improving resource utilization while organizing complexity along the frequency axis rather than managing all devices on a single carrier.
2Area of stationary object
If carrier aggregation is implemented for sidelink communication, then bandwidth utilization is improved, but device complexity and protocol requirements worsen
Solution Approach 1:
The patent implements universal parameter propagation mechanisms that work across all component carriers and sidelink communication modes. The same synchronization parameters, QoS configurations, and resource allocation rules are propagated universally to all CCs, allowing the system to achieve high bandwidth utilization through carrier aggregation while using a single set of protocol rules rather than requiring separate complex protocols for each carrier.
Solution Approach 2:
The patent changes key operational parameters (such as synchronization timing, resource allocation patterns, and QoS parameters) from being carrier-specific to being propagated across all component carriers. This parameter propagation approach allows bandwidth to scale with the number of aggregated carriers while keeping device complexity manageable through consistent parameter application across all CCs.
3Measurement precision
If synchronization parameters are propagated across all component carriers, then synchronization accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent applies discarding and recovering by transmitting synchronization parameters on selected component carriers and recovering/applying them to all other aggregated carriers. Instead of redundantly transmitting the same synchronization information on every CC (which would create excessive signaling overhead), the system transmits once and recovers the synchronization state across all carriers, achieving high synchronization accuracy with minimal signaling overhead.
4Adaptability or versatility
If multiple protocols need to be supported simultaneously, then adaptability is improved, but resource management complexity worsens
Solution Approach 1:
The patent applies local quality by allowing different component carriers to be configured with different protocol parameters and QoS settings tailored to specific traffic types or protocol requirements. Each CC can be optimized for particular protocols (e.g., V2X, broadband, narrowband IoT) while using the unified carrier aggregation framework, enabling multi-protocol support without requiring completely separate resource management systems for each protocol.
Data Source
AI summary
Embodiments of a User Equipment (UE) and methods of communication are generally described herein. The UE may select one or more of the component carriers (CCs) of a carrier aggregation, and may transmit a sidelink synchronization signal (SLSS) and a physical sidelink broadcast channel (PSBCH) on the one or more selected CCs. The UE may encode the PSBCH to include a plurality of parameters related to the sidelink operation, wherein the plurality of parameters are to be propagated across all of the CCs of the plurality of CCs for the sidelink operation. The UE may transmit one or more physical sidelink shared channels (PSSCHs) in accordance with the carrier aggregation, and further in accordance with the plurality of parameters propagated across the plurality of CCs.