UL-DL Configuration Adaptation for Wireless Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically allocating radio resources, particularly in adapting to varying uplink and downlink load conditions, which affects the efficiency and flexibility of frequency band usage.
Innovation Solution
The method involves setting distinct Uplink-Downlink (UL-DL) configurations for different frequency bands, allowing for adaptive radio resource allocation based on load conditions, with specific subframes linked to control information transmission and reception, and utilizing a time offset to optimize UL and DL operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single UL-DL configuration is used for all frequency bands, then the system structure is simple, but the system cannot adapt to varying uplink and downlink load conditions
Solution Approach 1:
The patent divides the frequency band into multiple sub-bands (first frequency band and second frequency band) and assigns different UL-DL configurations to each sub-band. This segmentation allows each sub-band to be independently configured according to its specific uplink and downlink load requirements, thereby achieving adaptability without requiring complete reconfiguration of the entire system.
Solution Approach 2:
The patent enables dynamic adaptation by allowing the system to select different UL-DL configurations (first UL-DL configuration and second UL-DL configuration) for different frequency bands based on varying load conditions. This dynamic configuration approach allows the system to respond to changing traffic patterns while maintaining a manageable configuration structure through standardized configuration sets.
2Productivity
If different UL-DL configurations are set for different frequency bands, then the efficiency of frequency band usage is improved, but the complexity of resource allocation increases
Solution Approach 1:
The patent applies different UL-DL configurations to different frequency bands based on their specific load characteristics. Each frequency band can be optimized locally according to its uplink and downlink traffic demands, achieving high-frequency band usage efficiency while maintaining overall system coordination through centralized configuration management.
3Loss of energy
If uplink control information is received in downlink subframes, then the control signaling overhead is reduced, but the timing synchronization between uplink and downlink becomes more complex
Solution Approach 1:
The patent enables downlink subframes to serve dual purposes: both downlink data transmission and uplink control information reception. This multi-functionality reduces control signaling overhead by reusing existing downlink resources for uplink control purposes, while the use of standardized configuration patterns maintains timing synchronization manageability.
Data Source
AI summary
The present invention relates to a method and apparatus for transmitting uplink data using a hybrid automatic repeat request (HARQ) by a terminal in a wireless communication system. More particularly, the method disclosed in the present invention comprises the steps of: establishing a first uplink-downlink configuration for a first frequency band and establishing a second uplink-downlink configuration for a second frequency band; receiving uplink control information in a downlink subframe on the first frequency band; and transmitting uplink data corresponding to the uplink control information in a specific uplink subframe linked to the downlink subframe on the basis of the first uplink-downlink configuration and second uplink-downlink configuration.