Data Transmission Scheduling for Dynamic TDD Interference Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of cross-link interference and dynamic scheduling in 5G NR communication systems, particularly in managing traffic adaptation and hybrid automatic repeat request (HARQ) processes, has not been effectively addressed in existing technologies, especially in scenarios requiring flexible duplexing and dynamic time division duplexing (TDD) configurations.
Innovation Solution
A data transmission method involving semi-persistent configuration and dynamic signaling of transmission direction and content for each time unit, using a combination of group common physical downlink control channels and dynamic TDD to manage interference and adjust transmission resources dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamic TDD configuration is implemented to achieve traffic adaptation, then system adaptability to varying traffic demands is improved, but cross-link interference increases due to frequent transmission direction changes
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple TDD patterns (first TDD pattern and second TDD pattern) before dynamic switching occurs. The network device prepares these patterns in advance and notifies the terminal of the current pattern index, so when dynamic TDD switching is needed, the terminal already has the alternative pattern ready to use, enabling rapid adaptation without interference coordination delays
Solution Approach 2:
The patent introduces an intermediary mechanism through the TDD pattern index notification system. The network device acts as an intermediary that coordinates between different transmission directions by selecting and notifying the appropriate TDD pattern index to terminals. This intermediary control enables dynamic TDD switching while the network can coordinate to avoid cross-link interference through intelligent pattern selection and notification
2Adaptability or versatility
If transmission direction is changed dynamically to meet traffic requirements, then traffic load matching capability is improved, but HARQ process complexity increases due to scheduling conflicts
Solution Approach 1:
The patent applies dynamics by enabling the TDD pattern index to change dynamically based on traffic conditions. The network device can switch between different TDD patterns (e.g., from a pattern with more downlink slots to one with more uplink slots) according to real-time traffic demands. This dynamic reconfiguration allows the system to adapt traffic load matching while the network coordinates HARQ processes to manage the complexity of frequent direction changes
3Device complexity
If fixed TDD configuration is used to simplify scheduling, then system complexity is reduced, but traffic adaptation capability deteriorates
Solution Approach 1:
The patent applies periodic action through the use of predefined TDD patterns that can be periodically switched. Instead of continuous complex dynamic reconfiguration, the system uses a set of predetermined TDD patterns (first TDD pattern, second TDD pattern, etc.) that can be activated periodically based on traffic conditions. This periodic switching mechanism reduces scheduling complexity compared to fully dynamic configuration while still providing traffic adaptation capability through pattern selection
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Provided are a data transmission method and apparatus. The method includes that a first node configures configuration information of each time unit within a transmission period, where the configuration information includes a transmission direction and transmission content in each time unit, that the first node notifies the configuration information to a second node, and that the first node performs data transceiving with the second node according to the configuration information. According to the present disclosure, the problem of cross-link interference in the related art is solved.