Uplink-Downlink Subframe Configuration Fallback for Wireless Communication
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Solution Overview
Problem
User equipment cannot communicate with the network normally if it fails to receive correct physical layer control signaling carrying uplink-downlink sub-frame configuration information, leading to a significant drop in user throughput.
Innovation Solution
The user equipment determines a specific uplink-downlink sub-frame configuration when the configuration information is not received, allowing it to communicate with the network during reconfiguration periods using previously successful configurations, alternative configurations, high-layer signaling, system broadcasting, or reference configurations, thereby ensuring continuous communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If physical layer control signaling is used to carry uplink-downlink sub-frame configuration information, then the configuration can be transmitted efficiently, but communication fails when the signaling is not received correctly
Solution Approach 1:
The user equipment stores the last successfully received uplink-downlink sub-frame configuration information in advance. When new configuration signaling is not received or cannot be decoded correctly during reconfiguration period, the equipment falls back to using the previously stored configuration, thereby maintaining communication continuity without interruption.
Solution Approach 2:
The system prepares multiple configuration options including the current configuration, the last successfully received configuration, and default configurations. This cushioning of pre-prepared alternatives ensures that if the primary configuration signaling fails, the user equipment can immediately switch to a backup configuration, preventing communication failure.
2Adaptability or versatility
If uplink-downlink sub-frame configuration is reconfigured dynamically, then the system can adapt to changing traffic demands, but communication interruption occurs during reconfiguration if signaling is lost
Solution Approach 1:
The system implements dynamic switching between different uplink-downlink sub-frame configurations based on reception status of configuration signaling. The user equipment can transition from a static configuration to a dynamically adjusted configuration while maintaining communication stability through fallback mechanisms when signaling is lost.
Solution Approach 2:
The user equipment monitors the reception status of physical layer control signaling carrying configuration information. Based on this feedback, the equipment automatically determines whether to apply new configuration or revert to the last successful configuration, enabling adaptive response to signaling reception conditions.
3Device complexity
If static uplink-downlink time slot division is used, then the system is simple and effective for large coverage, but it cannot adapt to varying service scales and traffic demands
Solution Approach 1:
The patent transforms the static time slot division into a dynamic system by introducing reconfigurable uplink-downlink sub-frame configurations. The network can send configuration signaling to adjust the time slot division ratio according to actual traffic demands, while the user equipment adapts by storing and applying the latest successful configuration, thus achieving both simplicity and adaptability.
Data Source
AI summary
The present disclosure discloses a method and a device for communication. The method includes: determining, by the user equipment, a specific uplink-downlink sub-frame configuration when the uplink-downlink sub-frame configuration information is not received by the user equipment during the period; and communicating with a network side equipment by the user equipment during the period based on the specific uplink-downlink sub-frame configuration. By the solution of the present disclosure, a probability of the situation that the user equipment cannot communicate with the network normally as the user equipment does not correctly receive the physical layer control signaling which carries the uplink-downlink sub-frame configuration information and is sent from the network side is reduced, and user throughput is improved.