Uplink Data Channel Scheduling Conflict Resolution in Wireless Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, inconsistencies in downlink control information can lead to ambiguity in user equipment operations, particularly regarding demodulation reference signal (DMRS) sharing and repetition, affecting data rate and channel transmission reliability.
Innovation Solution
A method where user equipment receives first and second downlink control information for scheduling uplink data channels, transmitting based on the first information even if it is inconsistent with the second, and discarding the second information, to clarify DMRS sharing and prevent data rate reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple downlink control information are transmitted for scheduling uplink data channels, then scheduling flexibility is improved, but inconsistency between control information causes ambiguity in user equipment operations
Solution Approach 1:
The patent establishes predetermined rules for handling inconsistent downlink control information before the inconsistency occurs. The user equipment is configured with priority rules that determine which control information to follow when conflicts arise, eliminating the need for real-time decision-making and ensuring consistent behavior.
Solution Approach 2:
The patent introduces a priority mechanism as an intermediary layer between multiple downlink control information and the user equipment execution. This intermediary resolves conflicts by assigning priorities to different control information sources, ensuring that the user equipment can deterministically select which instruction to follow.
2Device complexity
If demodulation reference signal sharing is not properly clarified, then device complexity is reduced, but data rate and transmission reliability deteriorate
Solution Approach 1:
The patent segments the demodulation reference signal handling into distinct cases based on control information consistency. When control information is consistent, reference signals are shared across multiple channels; when inconsistent, separate reference signals are used. This segmentation allows the system to optimize for data rate when conditions permit while maintaining simplicity when conditions are uncertain.
Solution Approach 2:
The patent implements dynamic demodulation reference signal allocation that adapts to the consistency of received control information. The system transitions between shared and separate reference signal modes based on real-time conditions, optimizing data transmission performance while maintaining clear operational rules.
3Loss of energy
If demodulation reference signal repetition is not properly managed, then resource efficiency is improved, but transmission reliability deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where the user equipment monitors the consistency of received downlink control information and adjusts demodulation reference signal repetition accordingly. When inconsistencies are detected, the system increases reference signal repetition to ensure reliable demodulation, while maintaining resource efficiency when conditions are stable.
Data Source
AI summary
The disclosure proposes a method for transmitting/receiving data in a wireless communication system and apparatus for supporting the same. Specifically, a method of transmitting an uplink data channel by a user equipment (UE) in a wireless communication system comprises receiving, from a base station, first downlink control information for scheduling an uplink data channel in an nth transmission time unit, receiving, from the base station, second downlink control information for scheduling an uplink data channel in an n+kth transmission time unit, and when information by the first downlink control information is inconsistent with information by the second downlink control information, transmitting an uplink data channel which is based on the first downlink control information to the base station, wherein the second downlink control information may be discarded by the UE.