Sidelink Carrier Aggregation QoS Mapping
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Solution Overview
Problem
Existing frequency mapping techniques in wireless communication networks are unable to guarantee that Quality of Service (QoS) flows are always delivered using appropriate sidelink carriers, due to limited visibility of QoS flow to carrier mappings at the MAC layer.
Innovation Solution
The implementation of a method where a user equipment (UE) determines the addition or modification of a PC5 QoS Flow, and subsequently provides a new or updated set of QoS Flow-to-frequency mappings from the V2X layer to the access stratum layer, ensuring that QoS flows are only mapped to allowed sidelink carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing frequency mapping techniques are used at the MAC layer, then the system structure remains simple, but the QoS flow to carrier mapping reliability is insufficient due to limited visibility of QoS flow mappings
Solution Approach 1:
The patent extends the frequency mapping mechanism from the MAC layer to the AS layer, adding a new dimensional level to the mapping architecture. This allows QoS flow to carrier mappings to be established and maintained at the AS layer, providing enhanced visibility and control while preserving the simplicity of the MAC layer operations.
Solution Approach 2:
The patent introduces the AS layer as an intermediary between the MAC layer and the QoS flow management. The AS layer receives QoS flow to carrier mappings from the V2X layer and provides frequency information to the MAC layer, serving as a mediator that enables reliable mapping without directly complicating the MAC layer architecture.
2Reliability
If QoS flow to carrier mappings are established at the AS layer, then mapping reliability is improved, but the complexity of the mapping mechanism increases
Solution Approach 1:
The patent segments the mapping mechanism into distinct functional components: the V2X layer manages QoS flow to carrier mappings, the AS layer handles frequency information and mapping provision, and the MAC layer executes the actual mapping. This segmentation allows each layer to focus on specific functions, improving overall reliability while keeping individual layer complexity manageable.
Solution Approach 2:
The AS layer performs preliminary actions by receiving and processing QoS flow to carrier mappings from the V2X layer before providing frequency information to the MAC layer. This preliminary processing ensures that all necessary mapping information is prepared and validated in advance, improving mapping consistency without adding real-time complexity at the MAC layer.
3Quantity of substance
If the V2X layer provides complete service to frequency mappings, then mapping completeness is improved, but the amount of information processing increases
Solution Approach 1:
The patent extracts only the necessary frequency mapping information from the complete V2X layer mappings and provides it to the AS layer. The AS layer then extracts and provides only the required frequency information to the MAC layer. This selective extraction approach maintains mapping completeness where needed while reducing unnecessary information processing at each layer.
Solution Approach 2:
The V2X layer provides complete service to frequency mappings to ensure mapping completeness, while the AS and MAC layers perform partial actions by processing only the necessary frequency information. This partial action approach at lower layers reduces processing time and resource consumption while maintaining the completeness of the overall mapping mechanism through the V2X layer's comprehensive provision.
Data Source
AI summary
In accordance with aspects of the present disclosure, a user equipment (UE) may receive a configuration for mapping PC5 quality of service (QoS) flows to frequencies. The UE may also receive a sidelink logical channel configuration message indicating that sidelink data associated with a logical channel can be mapped to one or more sidelink carriers on a list of allowed sidelink carriers. Accordingly, the UE may transmit the sidelink data associated with the logical channel via at least one sidelink carrier on the list of allowed sidelink carriers based at least in part on mapping the logical channel to the at least one sidelink carrier in accordance with the configuration for mapping and the sidelink logical channel configuration message.