NR Sidelink Terminal Uplink Channel Selection for HARQ Overlap
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Solution Overview
Problem
The operation of a terminal in a wireless communication system is unclear when a Physical Uplink Control Channel carrying Hybrid Automatic Repeat Request (SL-HARQ-ACK) overlaps with a Physical Uplink Shared Channel in the time domain, particularly in NR Sidelink communication.
Innovation Solution
A terminal is equipped with a transmitting unit to handle overlapping channels by determining a process for transmitting either the first uplink control channel or the uplink shared channel, based on priority conditions and predefined parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal transmits both the first uplink control channel and the uplink shared channel simultaneously, then the SL-HARQ-ACK feedback and data transmission are maintained, but channel overlap and interference occur in the time domain
Solution Approach 1:
The terminal determines in advance whether the first uplink control channel and uplink shared channel overlap in the time domain before transmission. Based on this preliminary determination, the terminal proactively selects the appropriate transmission channel (either PUCCH or PUSCH) to avoid overlap interference, ensuring reliable SL-HARQ-ACK feedback transmission without channel conflict
Solution Approach 2:
The patent introduces an intermediary mechanism (the controlling unit) that mediates between the SL-HARQ-ACK feedback transmission requirement and the uplink shared channel transmission. This intermediary determines the appropriate channel selection based on overlap detection, resolving the conflict between maintaining feedback reliability and avoiding channel interference
2Object-affected harmful factors
If the terminal drops one of the overlapping channels to avoid interference, then channel overlap interference is eliminated, but transmission efficiency and resource utilization decrease
Solution Approach 1:
The terminal dynamically adjusts its transmission strategy based on the detected overlap condition. When overlap is detected, the terminal flexibly switches between PUCCH and PUSCH channels according to priority rules and configuration parameters, optimizing transmission efficiency while eliminating interference. This dynamic adaptation prevents fixed inefficiency and maximizes resource utilization
Solution Approach 2:
The patent changes transmission parameters (channel selection, priority levels, resource allocation) based on the overlap detection result. By adjusting these parameters dynamically, the system eliminates channel interference while maintaining high transmission efficiency through optimal resource usage, rather than simply dropping channels
3Productivity
If the terminal multiplexes the SL-HARQ-ACK with the uplink shared channel, then channel resource utilization improves, but multiplexing errors and processing complexity increase
Solution Approach 1:
The terminal performs preliminary determination of whether multiplexing is appropriate based on overlap detection and configuration parameters. Only when conditions are favorable does the terminal proceed with multiplexing SL-HARQ-ACK with PUSCH, avoiding unnecessary multiplexing complexity while maximizing resource utilization when beneficial
Solution Approach 2:
The controlling unit acts as an intermediary that manages the multiplexing process between SL-HARQ-ACK and PUSCH. It handles the complex processing by determining multiplexing conditions, managing resource allocation, and coordinating the combined transmission, thereby reducing overall system complexity through centralized control
4Object-affected harmful factors
If the terminal follows predefined priority rules for channel selection, then channel overlap interference is resolved, but operational flexibility and adaptability decrease
Solution Approach 1:
The terminal employs dynamic channel selection that adapts to different scenarios. While predefined priority rules provide a baseline for resolving overlaps, the terminal can flexibly adjust its behavior based on real-time conditions, configuration parameters, and traffic requirements, maintaining both interference resolution and operational flexibility
Solution Approach 2:
The patent allows dynamic adjustment of transmission parameters including channel selection, priority levels, and resource allocation based on detected conditions and configuration. This parameter flexibility enables the terminal to resolve channel overlaps while adapting to diverse operational scenarios, maintaining versatility rather than rigid adherence to fixed rules
Data Source
AI summary
Provided is a terminal having: a transmitting unit configured to transmit to a base station a first uplink control channel including a HARQ (Hybrid Automatic Repeat Request) response related to a sidelink and an uplink shared channel; and a controlling unit configured to determine a process to be applied in a case where the first uplink control channel overlaps with the uplink shared channel at least in a time domain; wherein the transmitting unit transmits to the base station the first uplink control channel or the uplink shared channel, by applying the process.