UCI Multiplexing for Multi-TRP Systems
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Solution Overview
Problem
In next-generation wireless communication systems, the lack of tight scheduling coordination between multiple transmit and receive points (TRPs) leads to overlapping uplink control information (UCI) transmissions, causing inefficiencies and difficulties in multiplexing UCI for multi-TRP operations, especially when there is no or loose coordination between TRPs.
Innovation Solution
Implementing a UCI multiplexing enhancement for multi-TRP operations by prioritizing UCI transmissions based on priority rules and using joint UCI reports, with explicit or implicit TRP index indication to ensure proper decoding, allowing for efficient resource utilization and handling of overlapping UCI from different TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TRPs operate independently without tight scheduling coordination, then each TRP can autonomously manage its resources and operations, but UCI transmissions from different TRPs overlap in time causing multiplexing difficulties and resource contention
Solution Approach 1:
The patent introduces a priority-based UCI selection mechanism as an intermediary layer between multiple TRPs and the uplink transmission channel. This mechanism mediates conflicts by selecting which UCI to transmit based on priority rules when resources overlap, enabling autonomous TRP operation while maintaining reliable UCI delivery through structured conflict resolution
2Productivity
If UCI from different TRPs is transmitted simultaneously without priority rules, then resource utilization is maximized, but UCI multiplexing becomes difficult and decoding reliability deteriorates
Solution Approach 1:
The patent segments the UCI transmission process by introducing priority levels and selection rules that divide the transmission decision into distinct stages: identifying overlapping UCIs, applying priority rules to select which to transmit, and dropping lower-priority UCIs. This segmentation maintains high resource utilization while ensuring decoding reliability through systematic conflict management
Solution Approach 2:
The patent changes the parameter of UCI transmission by introducing dynamic priority-based selection. Instead of treating all UCI equally, the system adjusts which UCI is transmitted based on priority parameters assigned to different TRPs and UCI types, enabling simultaneous operation of multiple TRPs while maintaining reliable decoding through parameter-driven discrimination
3Ease of operation
If tight scheduling coordination is implemented between multiple TRPs, then UCI multiplexing becomes easier and resource contention is reduced, but system complexity and coordination overhead increase
Solution Approach 1:
The patent enables TRPs to self-manage UCI transmission conflicts through autonomous priority-based selection rules. Each TRP independently determines whether to transmit or drop UCI based on pre-configured priority rules, eliminating the need for complex real-time coordination between TRPs while maintaining ease of UCI multiplexing through self-service conflict resolution
Data Source
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AI summary
Technology for a user equipment (UE) operable to encode uplink control information (UCI) for transmission to a Next Generation NodeB (gNB) is disclosed. The 5 UE can identify first UCI for a first transmit and receive point (TRP). The UE can identify second UCI for a second TRP. The UE can determine that a first physical uplink channel resource associated with the first UCI overlaps in time in a slot with a second physical uplink channel resource associated with the second UCI within a physical uplink control channel (PUCCH) group. The UE can apply a priority based UCI selection rule to 10 produce a priority based UCI communication of one or more UCI. The UE can encode the one or more UCI for transmission to the gNB using one or more of the first physical uplink channel resource or the second physical uplink channel resource.