Signal Transmission Mode Selection for Overlapping Uplink Channels
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Solution Overview
Problem
In LTE and 5G mobile communication systems, simultaneous transmission of physical uplink control channels (PUCCH) and physical uplink shared channels (PUSCH) with varying traffic types and priorities is challenging, particularly in scenarios where channels overlap with different starting points and lengths, leading to inefficiencies in conventional multiplexing schemes.
Innovation Solution
A method for signal transmission in user equipment (UE) that determines a sending mode for overlapping uplink channels based on channel priorities, lengths, and resource availability, allowing for efficient multiplexing of uplink control information (UCI) on either PUCCH or PUSCH, or both, to improve latency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If conventional multiplexing rules are used for PUCCH and PUSCH, then existing transmission methods are maintained, but traffic of different priority levels cannot be effectively multiplexed and latency increases
Solution Approach 1:
The patent introduces dynamic determination of sending modes based on real-time channel overlap conditions. The user equipment dynamically selects between first sending mode (PUCCH transmitted separately) and second sending mode (UCI multiplexed on PUSCH) based on the specific overlap scenario, enabling adaptive handling of different priority traffic levels and reducing latency for high-priority URLLC traffic.
2Productivity
If PUCCH and PUSCH are transmitted simultaneously, then transmission efficiency is improved, but channel overlap with different starting points and lengths creates transmission conflicts
Solution Approach 1:
The patent changes the transmission parameter selection based on channel overlap conditions. When PUCCH and PUSCH overlap, the system determines whether to transmit PUCCH separately or multiplex UCI on PUSCH based on parameters such as the starting symbols and lengths of the channels, ensuring reliable transmission under varying overlap scenarios while maintaining high transmission efficiency.
3Quantity of substance
If UCI is multiplexed on PUSCH, then resource utilization is improved, but traditional mapping rules become inapplicable for different priority traffic types
Solution Approach 1:
The patent segments the UCI multiplexing process into distinct modes: first sending mode where PUCCH is transmitted separately for high-priority traffic, and second sending mode where UCI is multiplexed on PUSCH for resource-efficient transmission. This segmentation allows the system to handle different priority traffic types with appropriate rules, simplifying the overall complexity while improving resource utilization.
Data Source
Figure 1~2B
Figure 3~5A
Figure 5B~5D
AI summary
Provided are a method and apparatus for signal transmission and a terminal. The method includes determining the sending mode of multiple uplink channels by a user equipment (UE) in a case where overlapped symbols of the uplink channels exist in time domain; and sending uplink signals carried by the uplink channels according to the determined sending mode. The solution provides a multiplexing scheme for simultaneously sent traffic signal of different priority levels, thereby reducing the latency index of low-latency and high-reliability information and improving the reliability index of low-latency and high-reliability information.