Dynamic MCS Configuration for XR Uplink Configured Grants
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Solution Overview
Problem
Current 5G NR systems face inefficiencies in transmitting XR data due to static or semi-static allocation of modulation coding scheme (MCS) and physical resource blocks, which limits spectral efficiency and user experience, especially in immersive technologies requiring variable data transmission.
Innovation Solution
Implementing dynamic configuration of MCS levels and transport block sizes across multiple CG PUSCH occasions within a single CG period, using explicit or implicit MCS indications, and rules for adjusting MCS based on remaining packet delay budget, allowing flexible resource allocation and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If static or semi-static allocation of MCS and physical resource blocks is used, then device complexity is reduced and ease of operation is improved, but spectral efficiency and adaptability deteriorate
Solution Approach 1:
The patent implements dynamic MCS indication mechanisms where the network entity can dynamically adjust MCS values for different CG PUSCH occasions within a CG period. This is achieved through DCI formats that carry MCS indications, allowing the system to adapt transmission parameters in real-time based on channel conditions and traffic requirements, thereby resolving the contradiction between operational simplicity and spectral efficiency
Solution Approach 2:
The patent changes the transmission parameter (MCS) from static to dynamic by introducing multiple MCS indication methods including explicit MCS values, MCS tables, and differential MCS indications. This allows the system to optimize spectral efficiency by adjusting MCS parameters according to varying channel conditions while maintaining manageable device complexity through standardized configuration procedures
2Adaptability or versatility
If dynamic configuration of MCS levels and transport block sizes is implemented, then spectral efficiency and adaptability are improved, but device complexity and configuration complexity increase
Solution Approach 1:
The patent applies preliminary action by pre-configuring MCS tables and transport block size relationships before actual data transmission. The network entity configures multiple MCS tables with different transport block size mappings in advance, and the UE stores these configurations for rapid selection during CG PUSCH transmissions, reducing real-time processing complexity while maintaining dynamic adaptability
Solution Approach 2:
The patent introduces MCS tables as an intermediary layer between the network entity's scheduling decisions and the UE's transmission parameters. These tables pre-establish the relationship between MCS indices and transport block sizes, allowing the system to handle dynamic parameter changes through table lookups rather than complex real-time calculations, thereby reducing device complexity while maintaining spectral efficiency
3Productivity
If multiple CG PUSCH occasions are used within a single CG period, then data transmission flexibility and spectral efficiency are improved, but the complexity of resource management increases
Solution Approach 1:
The patent segments the CG period into multiple CG PUSCH occasions, each potentially carrying different data packets with different QoS requirements. This segmentation allows independent resource allocation and MCS configuration for each occasion, enabling fine-grained control over resource management while improving overall data transmission efficiency through parallel transmission opportunities
Solution Approach 2:
The patent employs periodic CG PUSCH occasions within a configured CG period, creating a rhythmic transmission pattern that simplifies resource management through predictability. The periodic structure allows the network to pre-allocate resources and configure parameters in advance, reducing real-time management complexity while maintaining high data transmission efficiency through regular transmission opportunities
Data Source
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AI summary
Enhanced uplink configured grant for extended reality applications is provided. A method for enhanced uplink configured grant for extended reality applications may include configuring at least one first transmission of a plurality of transmissions by a user equipment with a transmission parameter having a first value. The method may also include configuring the user equipment with at least one rule configured to change the first value of the transmission parameter to a second value of the transmission parameter that is applied to at least one second transmission of the plurality of transmissions, which is used for a new data transmission.