Terminal HARQ-ACK Timing Shortening via TTI Adaptation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional transmit power control methods in communication systems, such as those using LTE technology, often fail to achieve efficient communication due to inefficiencies in timing and formatting of Hybrid Auto Repeat request-acknowledgements (HARQ-ACK) transmissions.
Innovation Solution
A terminal apparatus and method that shorten the timing for transmitting HARQ-ACK based on a prescribed Transmission Time Interval (TTI) length, with the PUCCH format determined by the TTI lengths of both the PDSCH and PUCCH, to enhance communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional transmit power control methods are used, then communication can be maintained with standard timing, but transmission efficiency deteriorates due to suboptimal HARQ-ACK timing and formatting
Solution Approach 1:
The patent applies dynamics by making the HARQ-ACK transmission timing flexible rather than fixed. The terminal apparatus dynamically adjusts the timing based on the TTI length of the PDSCH, allowing the system to adapt to different transmission conditions and optimize efficiency for each specific case rather than using a one-size-fits-all timing approach
Solution Approach 2:
The patent changes the timing parameter of HARQ-ACK transmission based on the TTI length parameter. By varying the transmission timing according to the configured TTI length of the PDSCH, the system optimizes the round-trip time for different data transmission scenarios, thereby improving overall transmission efficiency
2Productivity
If conventional PUCCH formatting is used, then compatibility with existing systems is maintained, but communication efficiency deteriorates due to non-optimized PUCCH format selection
Solution Approach 1:
The patent changes the PUCCH format parameter based on the TTI length parameter. By selecting different PUCCH formats according to the configured TTI length, the system optimizes the control channel formatting for different transmission scenarios, improving communication efficiency while maintaining a systematic approach to format selection
Data Source
AI summary
Provided is a terminal apparatus including a receiver that can receive a PSDCH and a transmitter that can transmit an HARQ-ACK for the PDSCH by use of a PUCCH. In the terminal apparatus, the transmitter shortens a timing for transmitting the HARQ-ACK for the PDSCH based on a prescribed TTI length configured for the PDSCH, and a PUCCH format to transmit the HARQ-ACK is determined based on the TTI length of the PDSCH and the TTI length of the PUCCH.