Terminal Device HARQ Feedback Conflict Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, when a HARQ process conflict occurs due to deferred feedback information for a SPS PDSCH, existing protocols require terminal devices to discard this information, which can be impossible due to processing delays, leading to inefficiencies and potential data loss.
Innovation Solution
The method involves determining an operation for the first feedback information based on the time domain position associated with a second PDSCH, allowing the terminal device to either discard or transmit the first feedback information, thereby avoiding direct discarding and ensuring efficient uplink transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device discards the first feedback information according to existing protocols, then the HARQ process conflict is resolved, but the feedback information may be lost and transmission efficiency deteriorates
Solution Approach 1:
The patent introduces dynamic judgment mechanisms that allow the terminal device to adaptively determine whether to discard or transmit deferred feedback information based on real-time conditions. The terminal evaluates timing relationships between the first physical channel, second PDSCH, and processing capabilities to make intelligent decisions, transforming the static discard rule into a dynamic, context-aware process that balances reliability and efficiency.
Solution Approach 2:
The patent changes the decision parameter from a fixed protocol rule to a flexible judgment based on multiple parameters including time domain positions, processing capabilities, and scheduling conditions. By introducing conditional parameters (timing relationships, capability flags), the system can adjust the feedback handling strategy to optimize both reliability and transmission efficiency under different scenarios.
2Reliability
If the terminal device transmits the first feedback information, then the feedback reliability is improved, but the HARQ process conflict occurs and system complexity increases
Solution Approach 1:
The patent applies preliminary action by having the terminal device evaluate timing relationships and processing capabilities before making the transmission decision. The terminal pre-judges whether the first physical channel and second PDSCH timing allows for conflict-free transmission, and pre-assesses its own processing capability to handle potential conflicts. This advance evaluation simplifies the actual transmission decision and reduces runtime complexity.
Solution Approach 2:
The patent introduces an intermediary judgment mechanism that mediates between the conflicting requirements of feedback transmission and HARQ process management. The terminal device acts as an intermediary by evaluating multiple conditions (timing, capability, scheduling) and making an intelligent decision that balances both requirements, rather than following a rigid protocol rule.
3Loss of time
If the terminal device immediately discards the first feedback information, then the processing time is reduced, but the power consumption increases due to repeated transmissions
Solution Approach 1:
The patent enables continuity of useful action by allowing the terminal device to transmit deferred feedback information when conditions permit, rather than immediately discarding it. This continuous transmission approach avoids the need for repeated retransmissions of the same feedback information, thereby reducing overall processing time and power consumption associated with multiple transmission attempts.
4Productivity
If the terminal device evaluates timing relationships and makes intelligent decisions, then the transmission efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent segments the decision-making process into distinct evaluation stages: timing relationship evaluation, processing capability assessment, and final transmission decision. By dividing the complex judgment into modular segments with clear criteria, the terminal device can systematically evaluate conditions without overwhelming complexity, improving transmission efficiency through structured decision-making.
Data Source
AI summary
A wireless communication method, a terminal device, and a network device are provided. The method includes: determining, by a terminal device, a first physical channel or a first time unit in which a first physical channel is located, where the first physical channel is used to transmit first feedback information corresponding to a first PDSCH, the first time unit is later than a second time unit, and the second time unit is a time unit determined based on pre-configured information and used to transmit the first feedback information corresponding to the first PDSCH; receiving, by the terminal device, a second PDSCH, where HARQ process number carried in the second PDSCH is the same as HARQ process number carried in the first PDSCH; and determining, by the terminal device, an operation for the first feedback information based on a time domain position associated with the second PDSCH.