Configuring Channel Occupancy Time for Latency Management
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring channel occupancy time (COT) to manage uplink and downlink transmissions, particularly in unlicensed spectra, leading to inefficiencies and potential delays in meeting latency requirements for diverse applications like extended reality (XR) services.
Innovation Solution
Implementing enhanced configured grant uplink control information (CG-UCI) mechanisms that include multiple sets of offsets and durations for channel occupancy time, allowing devices to adjust transmission schedules based on remaining delay budgets and packet priorities, enabling more efficient sharing and utilization of COTs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional COT configuration methods are used, then system complexity is reduced, but latency performance deteriorates for diverse applications
Solution Approach 1:
The patent implements dynamic COT configuration where the network device adjusts COT parameters (duration, offset values) based on real-time QoS requirements and remaining delay budgets of different traffic types. This allows the system to adapt COT timing characteristics to match varying latency demands of XR, eMBB, and other services, resolving the contradiction between maintaining simple configuration and achieving low latency performance.
Solution Approach 2:
The patent changes key COT parameters including duration, offset values, and timing characteristics based on traffic type and QoS requirements. By dynamically adjusting these parameters rather than using fixed configurations, the system can optimize latency performance for different applications while managing the complexity through structured parameter management.
2Adaptability or versatility
If multiple COT configurations are implemented for different traffic types, then adaptability improves, but device complexity increases
Solution Approach 1:
The patent segments COT configurations into distinct types (first COT for initial transmission, second COT for retransmission) with specific parameters optimized for each traffic type (XR, eMBB, etc.). This segmentation allows the system to provide high adaptability for diverse services while managing complexity through modular, type-specific configuration structures rather than requiring complex multi-dimensional configuration management.
Solution Approach 2:
The patent creates a universal COT configuration framework that can serve multiple traffic types and QoS requirements through a standardized parameter structure. The same COT configuration mechanism handles different service types by adjusting parameters within a unified framework, providing multi-functionality without proportionally increasing system complexity.
3Reliability
If COT duration is extended to accommodate retransmissions, then reliability improves, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent performs preliminary actions by configuring the second COT in advance with predetermined parameters (duration, offset) that are optimized for retransmission scenarios. This allows the system to ensure transmission reliability through pre-planned retransmission opportunities while improving resource utilization by avoiding ad-hoc COT extensions that would waste resources. The preliminary configuration enables efficient use of channel resources for both initial transmissions and potential retransmissions.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring channel occupancy time. One method includes receiving, at a user equipment (“UE”), a first indication in a first channel occupancy time (“COT”). The first indication indicates information about a remaining delay budget for a downlink (“DL”) packet, application data unit (“ADU”), or a combination thereof. The method includes initiating a second COT by transmitting a configured grant (“CG”) uplink (“UL”) transmission. The second COT starts after an end of the first COT. The method includes determining whether to include a CG uplink control information (“UCI”) (“CG-UCI”) in the CG UL transmission based on the first indication. The CG-UCI indicates a first offset, a first duration, or a combination thereof.