Configured Grant Segmentation for NR-U Interference Management
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Solution Overview
Problem
In the New Radio-Unlicensed (NR-U) frequency band, configuring Configured Grants (CGs) effectively in interference-controlled scenarios is challenging, particularly for ensuring communication quality and success rate, as existing methods fail to adequately manage interference and resource conflicts.
Innovation Solution
The method involves configuring multiple types of CGs, including a first type supporting high-reliability and low-latency services on licensed or unlicensed bands, and a second type optimized for NR-U, with enhanced parameters such as HARQ process offsets, retransmission timers, and autonomous transmission, to manage resource conflicts and ensure fair coexistence with other unlicensed spectrum users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple CGs are configured for NR-U with different parameters, then communication quality and success rate are improved, but device complexity and configuration management become more complex
Solution Approach 1:
The patent segments CG configuration into multiple distinct types (first type CG and second type CG), each with specific parameter sets optimized for different service requirements. This segmentation allows the system to provide specialized configurations for high-reliability low-latency services versus other services, improving communication success rate while maintaining manageable complexity through structured classification
Solution Approach 2:
The patent applies parameter changes by defining different parameter sets for different CG types. The first type CG uses parameters optimized for high-reliability low-latency services (such as specific HARQ process offsets, retransmission timers), while the second type CG uses parameters suitable for other services. This parameter differentiation resolves the contradiction by providing tailored configurations that improve reliability without requiring complete reconfiguration for each service type
2Reliability
If CG resources are allocated for high-reliability and low-latency services, then service quality is improved, but resource conflicts and interference with other unlicensed spectrum users increase
Solution Approach 1:
The patent applies local quality by assigning different CG types to different service requirements and frequency band types. Licensed band CGs use one configuration set optimized for reliability, while unlicensed band CGs use another configuration set that accounts for LBT requirements and coexistence needs. This localized optimization ensures high service quality for critical services while managing interference through appropriate local parameter selection
Solution Approach 2:
The patent changes parameters based on the service type and frequency band. For unlicensed band CGs, parameters are adjusted to account for LBT procedures, potential interruptions, and coexistence with other systems. This parameter adaptation reduces interference with other unlicensed spectrum users while maintaining service quality through compensated configuration parameters
3Adaptability or versatility
If LBT procedure is implemented in unlicensed band, then fair coexistence with other users is achieved, but transmission delays and communication reliability are reduced
Solution Approach 1:
The patent applies preliminary action by configuring specific parameters in advance for unlicensed band CGs that account for LBT delays and potential transmission interruptions. Retransmission timers and HARQ process offsets are pre-configured to compensate for expected LBT delays, ensuring that even though LBT is performed, the overall communication reliability is maintained through proactive parameter selection
Solution Approach 2:
The patent changes parameters specifically for unlicensed band operations to account for LBT requirements. Configuration parameters include adjusted timing values, retransmission settings, and HARQ process offsets that compensate for the delays introduced by LBT procedures. This parameter adaptation maintains communication reliability while preserving the ability to achieve fair coexistence through LBT
Data Source
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AI summary
Disclosed are a CG configuration method and apparatus, and a device and a storage medium, which relate to the field of communications. The method comprises: a network device configuring at least one CG for a terminal, wherein the at least one CG comprises at least one of a first-type CG and a second-type CG, and the first-type CG and/or the second-type CG is used for a shared spectrum access operation. By means of the present application, in an NR-U scenario, a breakthrough occurs in terms of the limitation that only a CG resource for an NR-U can be configured, and a network device configures at least one type of CG for the same UE, thereby improving the communication quality and success rate.