URLLC Search Space Switching for Uplink Cancellation Monitoring
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Solution Overview
Problem
In shared spectrum operation, frequent monitoring for uplink cancellation indications to support ultra-reliable low-latency communications incurs high resource and power costs, and existing configurations fail to efficiently manage resource requirements across search spaces with varying periodicities.
Innovation Solution
A method and apparatus for configuring different sets of search spaces with distinct uplink cancellation configurations, including varying reference time durations and monitoring periodicities, to selectively apply appropriate reference time durations based on the search space in which the cancellation indication is received.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequent monitoring for uplink cancellation indications is performed to support ultra-reliable low-latency communications, then reliability and latency performance is improved, but resource consumption and power usage increases
Solution Approach 1:
The patent applies dynamics by making the monitoring configuration adaptive rather than static. The network entity dynamically configures different monitoring periodicities and reference time durations based on the specific search space set and traffic conditions. This allows the system to adjust monitoring intensity in real-time, performing frequent monitoring when URLLC traffic requires it while reducing monitoring frequency during normal operation, thereby resolving the contradiction between reliability and power consumption.
Solution Approach 2:
The patent implements local quality by applying different monitoring configurations to different search space sets rather than using a uniform configuration across all search spaces. Each search space set can have its own monitoring periodicity and reference time duration tailored to its specific requirements. This localized approach ensures that frequent monitoring is applied only where necessary for URLLC support while other search spaces use less intensive monitoring, reducing overall power consumption while maintaining reliability where needed.
2Adaptability or versatility
If multiple search space sets are configured with different monitoring periodicities, then adaptability to different communication requirements is improved, but device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the search space monitoring function into multiple independent search space sets, each with its own configuration parameters. Instead of managing one complex monolithic configuration, the system segments monitoring into separate sets that can be independently configured and managed. Each search space set has its own monitoring periodicity and reference time duration, allowing the device to handle multiple configurations in a modular fashion, reducing the perceived complexity while maintaining high adaptability.
Solution Approach 2:
The patent implements universality by designing a unified configuration framework that can accommodate multiple search space sets with different parameters. The network entity provides a universal configuration mechanism that handles diverse monitoring requirements through a consistent interface. The user equipment uses a universal processing approach to manage multiple configurations, applying the same fundamental procedures across different search space sets regardless of their specific parameters, thereby reducing device complexity while maintaining versatility.
Data Source
AI summary
A first uplink cancellation configuration for a downlink bandwidth part is received (302). Based on the first uplink cancellation configuration, a first reference time duration associated with a first set of uplink cancellation indications detected in a first set of search spaces is determined (304). A second reference time duration associated with a second set of uplink cancellation indications detected in a second set of search spaces is determined (306). Receipt of an uplink cancellation indication is monitored for (308) in at least one of the search spaces. A particular one of the reference time durations is selectively used (310) in connection with a received uplink cancellation indication dependent upon which one of the first set of search spaces and the second set of search spaces, that is being monitored, is identified as including the uplink cancellation indication.


