Uplink Control Channel Overlap Handling in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting uplink control information when uplink channels overlap, leading to potential data loss and decoding issues due to overlapping transmissions of short and long PUCCH channels.
Innovation Solution
A method is proposed where the UE identifies resource regions for overlapping uplink control channels, prioritizes one channel over the other, and uses specific modulation symbols and resources to transmit information, ensuring that all data is transmitted without dropping channels, even when they overlap, by configuring the uplink resources and modulation symbols based on priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits both short PUCCH and long PUCCH channels simultaneously, then the uplink control information coverage is improved, but the overlapping transmissions cause decoding issues and data loss
Solution Approach 1:
The base station pre-configures multiple PUCCH resource sets and the UE determines which resources to use based on the overlap situation before transmission, preventing the overlapping conflict from occurring in the first place
Solution Approach 2:
The UE dynamically selects between different PUCCH transmission formats (short PUCCH, long PUCCH, or multiplexed transmission) based on the detected overlap condition, adapting the transmission strategy in real-time to avoid information loss
2Measurement precision
If the UE prioritizes one uplink control channel over another during overlap, then the decoding probability of high-priority information is improved, but the low-priority channel transmission is compromised
Solution Approach 1:
Different priority levels are assigned to different PUCCH channels (e.g., HARQ-ACK vs. CSI), and during overlap the UE selectively transmits based on priority, ensuring high-priority information is preserved while low-priority transmission may be sacrificed
Solution Approach 2:
The base station acts as an intermediary by configuring resource sets that enable the UE to differentiate between high-priority and low-priority channels, allowing selective transmission during overlap conditions
3Quantity of substance
If the UE transmits uplink control information using multiple overlapping channels, then the information coverage is improved, but the system complexity increases
Solution Approach 1:
The PUCCH resources are segmented into multiple sets with different characteristics (short/long format, different priorities), allowing the UE to select appropriate segments based on the transmission situation, managing complexity through structured organization
Solution Approach 2:
The configured PUCCH resource sets serve multiple functions - they can be used for short PUCCH transmission, long PUCCH transmission, or multiplexed transmission depending on the overlap condition, reducing the need for separate dedicated resources for each scenario
Data Source
AI summary
Disclosed are a method for transmitting an uplink channel in a wireless communication system, and an apparatus therefor. Specifically, a method by which a terminal transmits uplink control information comprises the steps of: identifying a resource region allocated to a first uplink control channel for transmitting first uplink control information, and a resource region allocated to a second uplink control channel for transmitting second uplink control information; and transmitting a specific modulation symbol to a base station using a specific uplink resource, if the transmission of the first uplink control channel and the transmission of the second uplink control channel overlap.