Uplink Channel Overlap Resolution in Multi-TRP Wireless Systems
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Solution Overview
Problem
In wireless communication systems with multiple transmit receive points (TRPs), existing technologies face challenges in efficiently resolving overlapping uplink channels, particularly in non-ideal backhaul scenarios where TRPs lack information sharing for scheduling decisions.
Innovation Solution
A method implemented in user equipment (UE) to determine association information mapping multiple TRPs to uplink channels, where overlapping channels are multiplexed or dropped based on priority rules and penalty values, ensuring non-overlapping transmissions to multiple TRPs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If uplink channels are transmitted to multiple TRPs simultaneously, then communication reliability is improved, but resource conflict and overlapping channels occur
Solution Approach 1:
The patent segments uplink channels into different types (first uplink channel and second uplink channel) based on their mapping relationships with TRPs. First uplink channels are mapped to single TRPs while second uplink channels are mapped to multiple TRPs. This segmentation allows independent handling and resolution of overlapping channels, reducing resource conflicts while maintaining communication reliability through diverse transmission paths.
Solution Approach 2:
The patent changes the mapping parameter of uplink channels from traditional single-TRP mapping to multi-TRP mapping for second uplink channels. By adjusting this mapping relationship parameter, the system enables simultaneous transmissions to multiple TRPs, improving reliability while the patent concurrently provides mechanisms to resolve overlapping conflicts through priority-based multiplexing or dropping strategies.
2Device complexity
If overlapping uplink channels are resolved by dropping channels, then resource conflict is reduced, but spectral efficiency deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the network device provides downlink control information to the terminal device, indicating whether to multiplex or drop overlapping uplink channels. This feedback enables dynamic resolution of resource conflicts based on current network conditions, allowing the system to optimize spectral efficiency by preserving necessary transmissions while resolving conflicts through informed decision-making rather than arbitrary dropping.
Solution Approach 2:
The patent introduces dynamic resolution strategies for overlapping channels through priority levels and multiplexing options. Instead of static dropping rules, the system dynamically determines whether to multiplex overlapping channels based on their priority relationships and current resource availability. This dynamic approach maintains spectral efficiency by preserving high-priority transmissions while resolving conflicts adaptively.
3Productivity
If priority-based multiplexing is implemented for overlapping channels, then spectral efficiency is improved, but processing complexity increases
Solution Approach 1:
The patent segments uplink channels into distinct types with predefined mapping relationships, which simplifies the priority-based multiplexing process. By categorizing channels into first uplink channels (single-TRP mapped) and second uplink channels (multi-TRP mapped), the system reduces processing complexity compared to evaluating all possible channel combinations, while still enabling spectral efficiency improvements through priority-based resolution of overlapping channels.
Data Source
AI summary
This disclosure provides systems, methods and apparatuses for uplink channel transmission for multiple transmit receive points (TRPs). In one aspect, a user equipment (UE) resolves overlapping physical uplink control channels (PUCCHs) in a slot or overlapping PUCCH(s) and PUSCH(s) that are mapped to a same TRP in a multi-TRP scenario and that are mapped to two or more different TRPs in the multi-TRP scenario. For example, in a multi-TRP scenario that includes two TRPs, the UE may eliminate overlap of these uplink channels for each of the two TRPs individually and may additionally eliminate overlap of these uplink channels between the two TRPs.