Dynamic Time Domain Resource Allocation for 5G Cross-Link Interference
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Solution Overview
Problem
Current 5G technologies face challenges in implementing flexible duplex and dynamic time division duplexing (TDD) to adapt to varying traffic loads, leading to cross-link interference and difficulties in dynamic uplink and downlink data transmission, which hinders efficient data transmission performance.
Innovation Solution
A method and device for determining a time domain resource for data transmission based on preset information, including indication information from a base station, channel sensing results, and interference measurement results, allowing for dynamic adjustment of uplink and downlink configurations to optimize data transmission according to traffic requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If each cell changes the frame structure according to traffic load dynamic adaptation or performs flexible duplex according to uplink and downlink configuration, then traffic load requirements are met and traffic load changes are matched, but cross link interference (CLI) problem occurs between adjacent cells and data transmission performance is influenced
Solution Approach 1:
The patent implements a sensing mechanism where user equipment measures channel occupancy in candidate time domain resources and feeds back sensing results to the network. The network uses this feedback information to determine whether to adjust the time domain resource configuration, creating a closed-loop system that adapts to interference conditions while maintaining traffic flexibility.
Solution Approach 2:
The patent performs channel sensing and interference measurement in advance before finalizing time domain resource allocation. By evaluating channel occupancy and interference levels in candidate resources beforehand, the system can proactively select resources that minimize cross-link interference while satisfying traffic adaptation requirements.
2Adaptability or versatility
If dynamic uplink and downlink configuration is implemented to meet traffic requirements, then traffic adaptation is achieved, but scheduling and hybrid automatic repeat request (HARQ) processes become complex
Solution Approach 1:
The patent enables dynamic adjustment of time domain resource configurations including slot formats, periodicities, and offsets based on traffic conditions and interference measurements. This dynamic capability allows the system to adapt scheduling parameters in real-time while maintaining manageable complexity through structured adjustment mechanisms.
Solution Approach 2:
The patent divides the time domain resources into configurable slots, mini-slots, and symbols with distinct functions. By segmenting the transmission timeline into manageable units with specific roles (data transmission, reference signals, feedback), the system simplifies scheduling and HARQ process management while maintaining dynamic adaptability.
3Productivity
If flexible duplex is implemented to support traffic adaptation, then uplink and downlink traffic requirements are met, but original scheduled data transmission becomes problematic under severe cross link interference
Solution Approach 1:
The patent uses sensing feedback from user equipment about channel occupancy and interference conditions to determine whether to maintain or adjust scheduled data transmission. This feedback mechanism enables the system to preserve reliable transmission by avoiding resources with severe cross-link interference while maintaining flexible duplex operation.
Solution Approach 2:
The patent converts the harmful effect of cross-link interference into useful information by using sensing measurements of interference levels to guide resource allocation decisions. Resources that would otherwise be problematic are identified through sensing, and the system adapts by selecting alternative resources or adjusting transmission parameters, turning the interference detection capability into a protective mechanism.
Data Source
AI summary
Provided are a data transmission method and device and a storage medium. The method includes: determining a first time domain resource for transmitting data according to first preset information, where the first preset information includes at least one of: indication information from a base station, a sensing result for a channel, or a measurement result for interference; and transmitting the data by using the determined first time domain resource.