TDD Uplink Signal Validation via Dynamic Subframe Configuration
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face challenges in efficiently managing dynamic changes in radio resources, leading to potential errors and inefficiencies in signal transmission and reception due to legacy UEs' inability to adapt to dynamically changed subframe configurations.
Innovation Solution
A method and apparatus for a user equipment (UE) in a TDD communication system that receives reference and operation subframe configuration information, determines the validity of uplink subframes based on HARQ-related information, and only transmits uplink signals if the subframes are valid, preventing errors by processing invalid subframes as reception errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dynamically changed subframe configurations are implemented in TDD communication systems, then radio resource flexibility and efficiency are improved, but legacy UEs experience transmission errors and cannot adapt to the changes
Solution Approach 1:
The patent implements dynamic subframe configuration where the eNodeB can change the direction (uplink/downlink) of subframes in real-time based on traffic conditions. The UE receives dynamic indication information to adapt its transmission behavior, allowing the system to flexibly adjust radio resource allocation while maintaining compatibility with legacy devices through proper error handling mechanisms.
Solution Approach 2:
The patent employs feedback mechanisms where the eNodeB provides dynamic indication information to the UE about subframe configurations. The UE uses this feedback to determine whether to transmit uplink signals in dynamically configured subframes, ensuring reliable operation by adapting to network conditions while maintaining system reliability through proper validation of transmission opportunities.
2Productivity
If dynamically changed subframe configurations are implemented, then resource distribution efficiency is improved, but UE complexity increases due to additional configuration processing requirements
Solution Approach 1:
The patent applies preliminary action by having the eNodeB provide dynamic indication information in advance before the actual transmission occurs. The UE uses this pre-provided information to pre-determine whether a subframe is valid for uplink transmission, avoiding complex real-time decisions during transmission and reducing processing complexity while maintaining efficient resource distribution.
3Adaptability or versatility
If dynamically changed subframe configurations are implemented, then adaptability to traffic conditions is improved, but HARQ timeline stability is compromised due to potential conflicts between dynamic config and HARQ timing
Solution Approach 1:
The patent uses feedback mechanisms where the eNodeB provides dynamic indication information that includes HARQ-related configuration details. The UE uses this feedback to validate whether dynamically configured subframes are appropriate for uplink transmission, ensuring that HARQ timing relationships are maintained while allowing flexible adaptation to traffic conditions.
Solution Approach 2:
The patent implements dynamic subframe configuration with built-in validation mechanisms that check HARQ timeline compatibility. The system can dynamically adjust subframe directions while maintaining HARQ stability by validating transmission opportunities against established timing relationships, thus achieving both adaptability and stability.
Data Source
AI summary
The present application discloses a method for enabling a terminal to transceive a signal with a base station in a TDD (Time Division Duplex) communications system. Specifically, the method includes the steps of: receiving reference sub-frame set information through the system information and active sub-frame set information through dynamic signaling; receiving an uplink grant for transmitting an uplink signal in a downlink sub-frame defined in the active sub-frame set information; judging the effectiveness of a particular uplink sub-frame for transmitting the uplink signal commanded by the uplink grant; and transmitting the uplink signal to the base station if the particular uplink sub-frame is effective.