Dynamic Uplink-Downlink Configuration Switching in 5G Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently allocating uplink and downlink resources in the time and frequency domains, particularly in extending coverage and managing latency, especially in 5G communication systems that require flexible resource allocation to support diverse services like eMBB, mMTC, and URLLC.
Innovation Solution
A method and device for dynamically changing the uplink-downlink configuration by transmitting configuration information and a change indicator to user equipment (UE), allowing for adjustments in frequency domain resources based on predetermined conditions, enabling flexible allocation of resources after a specified delay to optimize communication operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If uplink-downlink configuration is changed dynamically to support diverse 5G services, then adaptability and resource allocation flexibility are improved, but system complexity and potential for communication errors increase
Solution Approach 1:
The patent implements dynamic uplink-downlink configuration where the base station can change the configuration from a first configuration to a second configuration based on service requirements. The configuration change indicator enables flexible adaptation of time-frequency resources for different 5G services (eMBB, mMTC, URLLC) while maintaining systematic control through standardized signaling procedures
Solution Approach 2:
The patent segments the uplink-downlink configuration into distinct configurations (first configuration and second configuration) that can be independently selected and applied. Each configuration represents a specific time-frequency resource allocation pattern, allowing the system to switch between predefined configurations rather than managing continuous parameter adjustments
2Productivity
If configuration change is applied immediately to enhance resource utilization, then productivity is improved, but reliability deteriorates due to potential transmission errors during transition
Solution Approach 1:
The base station transmits the configuration change indicator to the UE in advance before actually applying the new configuration. This preliminary notification allows the UE to prepare for the configuration change, ensuring both entities are synchronized before the transition occurs, thereby preventing transmission errors during the configuration switch
Solution Approach 2:
The patent establishes a feedback mechanism where the base station monitors whether the UE has successfully applied the new configuration and can request re-application if necessary. This feedback loop ensures reliable configuration transitions by verifying successful application and providing correction opportunities if errors occur
3Speed
If latency is reduced by applying configuration changes quickly, then speed is improved, but reliability worsens due to insufficient processing time
Solution Approach 1:
The base station sends the configuration change indicator to the UE in advance, providing the UE with sufficient processing time to prepare for the configuration change. This preliminary action allows the UE to process the new configuration data before the actual application time, achieving both low latency and high reliability
Data Source
AI summary
Disclosed are a method and apparatus for changing uplink-downlink configuration in a wireless communication system. The method may comprise the steps of transmitting, to user equipment, uplink-downlink configuration information indicating first uplink-downlink configuration, transmitting, to the user equipment, a change indicator indicating second uplink-downlink configuration, determining whether or not an uplink-downlink direction is changed within a specific frequency domain resource based on a change from the first uplink-downlink configuration to the second uplink-downlink configuration, and, based on the uplink-downlink direction being changed, communicating with the user equipment on the frequency domain resource, according to the second uplink-downlink configuration after a predetermined change delay time from transmission of the change indicator.