UCI Resource Selection for Overlapping PUCCH Transmission
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Solution Overview
Problem
In the 5G NR system, the transmission resources of different UCI types overlap in the time domain, leading to inefficiencies and redundant transmissions, as user equipment can only transmit one PUCCH at a time.
Innovation Solution
A UCI combined transmission method where user equipment selects a transmission resource for multiple UCIs based on the start positions of overlapping resources, allowing simultaneous transmission of UCIs on a single resource.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transmission resources of different UCI types are independently configured, then each UCI can have its own dedicated resource, but transmission resources of different UCIs overlap in the time domain causing redundant transmissions
Solution Approach 1:
The patent combines multiple UCIs (first UCI and second UCI) into a single transmission resource. When the network device determines that transmission resources of different UCI types overlap in the time domain, it merges these UCIs and transmits them together on one resource, eliminating redundant transmissions while preserving independent configuration benefits
2Ease of operation
If user equipment transmits only one PUCCH at a time, then transmission timing is simplified, but UCIs cannot be transmitted simultaneously when resources overlap
Solution Approach 1:
The patent resolves the contradiction by merging multiple UCIs into a single PUCCH transmission. The network device combines the first UCI and second UCI when their resources overlap, allowing the UE to transmit all UCIs in one PUCCH, thus maintaining operational simplicity while improving transmission efficiency
3Adaptability or versatility
If transmission resources overlap in the time domain, then resource flexibility is increased, but synchronized understanding between user equipment and network on UCI transmission is lost
Solution Approach 1:
The patent establishes a feedback mechanism where the network device determines whether transmission resources overlap and actively manages the combination of UCIs. This feedback loop ensures both the network and UE have synchronized understanding of which UCIs to combine and transmit together, maintaining reliability while preserving resource flexibility
Data Source
AI summary
Disclosed are a UCI combined transmission method, a terminal, and a network device. The method comprises: when determining that a transmission resource of a first UCI overlaps transmission resources of a plurality of second UCIs in a time domain, a terminal selects the transmission resource of one second UCI from the transmission resources of the plurality of second UCIs according to an initial position of the transmission resource of the first UCI and the initial position of the transmission resources of the second UCIs, so as to simultaneously transmit the first UCI and the selected second UCI on the transmission resource of the selected second UCI. Accordingly, a network can also simultaneously receive the first UCI and the selected second UCI on the transmission resource of the selected second UCI with the same method.