Multi-Level Pre-emption Indicator for 5G Resource Allocation
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Solution Overview
Problem
Current 5G mobile telecommunications systems face challenges in accurately pre-empting resources for Ultra Reliable & Low Latency Communications (URLLC) due to coarse granularity in pre-emption indicators, leading to ghost pre-emption issues where non-preempted resources are wrongly indicated as preempted, affecting decoding performance.
Innovation Solution
A multi-level pre-emption indicator system is introduced, where first level information provides coarse granularity and second level information offers finer granularity, allowing for more accurate resource allocation by projecting a second resource grid onto the first resource grid, reducing ghost pre-emption and improving resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single-level pre-emption indicator with coarse granularity is used, then the system complexity is reduced and ease of operation is improved, but measurement precision of resource allocation deteriorates causing ghost pre-emption
Solution Approach 1:
The pre-emption indicator is segmented into two distinct levels: first level information provides coarse granularity resource allocation indication, while second level information provides fine granularity resource allocation indication. This segmentation allows the system to achieve high measurement precision for resource allocation while managing complexity through hierarchical structure rather than a single complex indicator.
Solution Approach 2:
The patent introduces a hierarchical dimension to the pre-emption indicator structure by adding a second level of information that projects a second resource grid onto the first resource grid. This dimensional addition transforms the single-level coarse indicator into a multi-level structure, enabling precise resource allocation indication without proportionally increasing overall system complexity.
2Reliability
If coarse granularity pre-emption indicators are used, then device complexity is reduced, but decoding performance deteriorates due to ghost pre-emption of non-preempted resources
Solution Approach 1:
By segmenting the pre-emption indicator into first level and second level information, the patent enables reliable decoding through the second level's fine granularity indication. The segmentation allows the system to identify precisely which resources are preempted, preventing ghost pre-emption errors that would otherwise cause decoding failures, while keeping each level's complexity manageable.
Solution Approach 2:
The second level information acts as an intermediary that refines the coarse indication from the first level. This intermediary layer provides the additional precision needed to accurately identify preempted resources, thereby improving decoding reliability by eliminating false pre-emption indications without requiring a complete redesign of the indicator system.
3Measurement precision
If fine granularity resource indication is provided, then resource allocation accuracy is improved, but information overhead increases
Solution Approach 1:
The hierarchical segmentation of pre-emption information allows fine granularity resource indication to be achieved efficiently. The first level provides broad resource allocation context, while the second level provides detailed refinement only where needed. This segmentation reduces information overhead compared to providing fine granularity information uniformly across all resources, as the second level information is projected onto specific regions of the first resource grid.
Data Source
AI summary
A base station for a mobile telecommunications system has circuitry configured to communicate with at least one user equipment, wherein the circuitry is further configured to: transmit, to the at least one user equipment, a multi-level pre-emption indicator for indicating, as first level information, first information about resources used for at least one short-data transmission within a transmission region which may contain at least one long-data transmission of the at least one user equipment, and, as second level information, second information about the resources used for the short-data transmission, wherein the second information more accurately indicates the resources used than the first information.