Priority Channel Multiplexing for PUCCH–PUSCH Conflicts
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Solution Overview
Problem
Existing wireless communication technologies face challenges in efficiently resolving conflicts between uplink channels of different priorities, leading to impaired performance of low-priority services when high-priority channels are prioritized for transmission, particularly in scenarios involving Physical Uplink Shared Channel (PUSCH) and Physical Uplink Control Channels (PUCCH) with varying transmission priorities.
Innovation Solution
A multiplexing scheme is proposed to resolve conflicts by selecting or creating new PUCCH resources for transmitting multiplexed information, converting priority indicators, and mapping UCI to PUSCH resources, ensuring high-priority services are not delayed and low-priority services are minimally affected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-priority uplink channels are prioritized for transmission, then high-priority service reliability is improved, but low-priority service performance deteriorates
Solution Approach 1:
The patent merges multiple uplink channels (PUCCH and PUSCH) of different priorities into a single transmission resource. When a high-priority PUCCH and low-priority PUSCH overlap in time, the system combines their information and transmits them together on the PUSCH resource, ensuring both high-priority control information and low-priority data are delivered without complete exclusion of either service
Solution Approach 2:
The PUSCH resource is given multi-functionality to carry both its original low-priority data payload and multiplexed high-priority uplink control information (UCI) from conflicting PUCCH resources. This allows a single resource to serve multiple functions and priority levels simultaneously, resolving the conflict without completely sacrificing either service type
2Productivity
If multiple uplink channels with different priorities share the same time resources, then resource utilization is improved, but channel conflict and transmission reliability deteriorate
Solution Approach 1:
The patent applies different handling rules to different parts of the transmission based on priority. High-priority UCI information is multiplexed with specific prioritization rules that ensure its reliability, while low-priority data on PUSCH follows different rules. The system locally adapts the transmission strategy to the priority level of each information type within the same resource
Solution Approach 2:
The system changes transmission parameters (such as resource allocation, power distribution, and multiplexing schemes) based on the priority of the information being transmitted. When high-priority channels are detected, parameters are adjusted to favor their reliable transmission while minimizing impact on low-priority services, dynamically adapting to maintain overall reliability
3Loss of time
If low-priority services are completely dropped to prioritize high-priority channels, then high-priority service delay is reduced, but low-priority service loss increases
Solution Approach 1:
The patent converts the potential harm of resource conflict into benefit by using the overlapping time resources of high-priority PUCCH and low-priority PUSCH as an opportunity for multiplexing. Instead of treating the overlap as a problem requiring one service to yield, the system exploits this overlap to achieve efficient resource utilization through combined transmission, turning the conflict into a beneficial multiplexing opportunity
Data Source
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AI summary
Techniques are described to address scenarios involving physical uplink channel conflicts. For example, a method includes performing a combined transmission of a first information multiplexed with a second information on a first physical channel resource selected from the first physical channel resource and a second physical channel resource, where the first physical channel resource and the second physical channel resource have different transmission priorities, where the first physical channel resource is configured to have a last symbol that is earlier in time compared to a last symbol configured for the second physical channel resource, and where the combined transmission is performed in response to the first physical channel resource being configured to include the first information that conflicts within a time period with the second physical channel resource being configured to include the second information.