Configured Grant Signaling for Unused XR Transmission Resources
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Solution Overview
Problem
The variable data size of XR applications results in inefficient resource utilization for configured grant (CG) transmissions, as not all CG occasions are utilized due to the varying size of XR data, leading to underutilization of resources.
Innovation Solution
A solution where a terminal device determines whether CG resources are needed and transmits an indication to a network device about the usage or cancellation of these resources, allowing the network to reallocate unused resources for other transmissions, thereby improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If configured grant resources are allocated for XR data transmission, then data transmission capability is improved, but resource utilization deteriorates due to variable data size causing unused CG occasions
Solution Approach 1:
The patent implements dynamic resource adjustment by allowing the terminal device to indicate whether upcoming CG resources are used or cancelled based on actual data transmission needs. The network device receives this indication and dynamically reallocates cancelled resources to other users or purposes, transforming the static CG resource allocation into a dynamic system that adapts to variable XR data sizes.
2Adaptability or versatility
If multiple CG occasions are allocated for variable size XR data, then transmission flexibility is improved, but resource waste increases as not all occasions are utilized
Solution Approach 1:
The patent enables the terminal device to discard (cancel) unused CG resources by sending a cancellation indication to the network device. The network device then recovers these cancelled resources and reallocates them to other users or transmission purposes, effectively converting wasted resources into usable resources for the network.
3Reliability
If CG resources are pre-configured for XR transmission, then transmission reliability is improved, but resource efficiency deteriorates due to over-allocation for variable data sizes
Solution Approach 1:
The patent implements a feedback mechanism where the terminal device monitors its actual data transmission needs and sends indications to the network device about whether upcoming CG resources will be used or cancelled. This feedback loop allows the network to adjust resource allocation in real-time, maintaining reliable transmission for needed data while improving overall resource efficiency through cancellation and reallocation of excess resources.
Data Source
AI summary
Example embodiments of the present disclosure relate to configured grant (CG) enhancements. An apparatus determines whether at least one resource in a predetermined duration is to be used for CG data transmission, the at least one resource following a target resource in time domain. The apparatus transmits, based on a determination result and to a network device, an indication on the target resource, the indication indicating if the at least one resource is used or cancelled. In this way, UE is capable of indicating the usage of CG occasions per period with little increase in signaling overhead. In some cases, a scheduling priority of the UE can be dynamically updated by the network based on such indication.