UCI Multiplexing on PUSCH with Fallback DCI Overlap Handling
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing multiplexing of uplink control information (UCI) on physical uplink shared channels (PUSCH) due to the absence of clear indicators in fallback DCI, leading to uncertainty in UCI multiplexing and potential inefficiencies in resource usage and interference.
Innovation Solution
A method is introduced where user equipment (UE) processes PUSCHs scheduled by both non-fallback and fallback DCIs, implementing a multi-step procedure to multiplex UCI on PUSCH when indicated by non-fallback DCI and handling overlaps or dropping UCI when necessary, thereby optimizing resource use and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fallback DCI is used for scheduling PUSCH, then device complexity is reduced and compatibility is improved, but UCI multiplexing clarity deteriorates and resource efficiency worsens
Solution Approach 1:
The patent introduces a multi-step processing procedure as an intermediary mechanism between the fallback DCI and UCI multiplexing decision. When fallback DCI is detected, the system applies specific rules (Step 1) that act as intermediaries to determine UCI multiplexing behavior, allowing the system to recover multiplexing clarity without requiring explicit indicators in the fallback DCI itself.
Solution Approach 2:
The patent establishes preliminary processing steps (Step 0, Step 1, Step 2) that are executed before final UCI multiplexing decisions are made. These preliminary actions include checking DCI type, evaluating overlap conditions, and applying specific rules in advance, which enables the system to handle fallback DCI efficiently while maintaining clear UCI multiplexing control.
2Productivity
If UCI multiplexing is always enabled on PUSCH, then resource efficiency improves, but interference increases and reliability deteriorates
Solution Approach 1:
The patent implements dynamic UCI multiplexing control where the multiplexing behavior changes based on real-time conditions. The system dynamically evaluates whether PUSCH and PUCCH overlap in time (Step 1), and adjusts multiplexing decisions accordingly - enabling multiplexing when efficient and disabling it when interference would occur, thus optimizing both resource efficiency and interference management.
Solution Approach 2:
The patent changes the multiplexing parameter based on detected conditions. When fallback DCI schedules PUSCH that overlaps with PUCCH in time, the system changes the multiplexing parameter from 'enabled' to 'disabled' according to Step 1 rules, thereby adapting resource efficiency to actual interference conditions rather than maintaining a fixed multiplexing state.
3Productivity
If multi-step UCI multiplexing procedure is implemented, then resource efficiency and interference management improve, but processing time increases
Solution Approach 1:
The patent segments the UCI multiplexing decision process into distinct steps (Step 0, Step 1, Step 2) that can be executed sequentially. This segmentation allows the system to process only relevant conditions at each step - quickly checking DCI type first, then evaluating overlap only when necessary, and applying rules in a structured manner, which optimizes processing time while maintaining comprehensive resource efficiency control.
Data Source
AI summary
Certain aspects of the present disclosure provide a method for wireless communications at a user equipment (UE). The UE may receive a first downlink control information (DCI) of a first type scheduling one or more first physical uplink shared channels (PUSCHs) and a second DCI of a second type scheduling one or more second PUSCHs. The UE may process at least one of the one or more first PUSCHs scheduled by the first DCI or the one or more second PUSCHs scheduled by the second DCI. The processing of the one or more first PUSCHs may include multiplexing at least one uplink control information (UCI) on a PUSCH of the one or more first PUSCHs and transmitting the PUSCH of the one or more first PUSCHs.