Uplink Precoding for Repeated Transmission in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink data channels and performing simultaneous channel estimation, particularly in 5G and beyond systems, where multiple precoders and timing considerations complicate data transmission and reception.
Innovation Solution
A method and device for determining and applying multiple precoders for repetitive uplink data channel transmission, based on configuration information received from a base station, allowing for flexible application of different precoders based on timing and period considerations, and simultaneously performing channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple precoders are applied for repetitive uplink data channel transmission, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic precoder selection where the terminal device determines multiple precoders based on timing information and periodically switches between them during repetitive transmissions. This dynamic adaptation allows the system to optimize transmission reliability by selecting appropriate precoders for different time instances while managing complexity through structured selection rules rather than exhaustive optimization
Solution Approach 2:
The patent changes the precoder parameter over time by applying different precoders in different transmission repetitions. The terminal device determines a first precoder for initial transmissions and a second precoder for subsequent transmissions based on timing conditions, thereby varying the transmission parameters to improve reliability without requiring complex real-time optimization algorithms
2Productivity
If different precoders are applied based on timing and period, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent employs periodic precoder application where a first precoder is used for initial uplink data channel transmissions and a second precoder is applied periodically for subsequent repetitions. This periodic structure improves transmission efficiency by systematically varying precoders to adapt to channel changes while maintaining manageable system complexity through regular, predictable switching patterns rather than complex adaptive algorithms
Solution Approach 2:
The terminal device determines multiple precoders in advance based on configuration information and timing relationships before actual transmissions occur. By pre-determining the first and second precoders based on known timing information and periodicity, the system prepares transmission parameters ahead of time, improving efficiency while avoiding the need for complex real-time decision-making during transmission
3Measurement precision
If simultaneous channel estimation is performed with repetitive transmission, then measurement precision is improved, but processing complexity increases
Solution Approach 1:
The patent performs channel estimation continuously across multiple repetitive uplink data channel transmissions using the same or different precoders. By accumulating channel estimation information over multiple transmissions rather than relying on a single measurement, the system improves channel estimation precision while managing processing complexity through incremental updates and reuse of previously estimated channel parameters
Data Source
AI summary
Provided are a method for applying precoding to an uplink data channel and a device for same. Specifically, the method performed by a terminal in a wireless communication system comprises the steps of: receiving configuration information about repeated transmission of an uplink data channel; confirming a plurality of precoders for the repeated transmission of the uplink data channel; and repeatedly transmitting the uplink data channel to a base station on the basis of the configuration information and the plurality of precoders, wherein a first precoder among the plurality of precoders may be applied to a first uplink data channel, and a second precoder may be applied to an uplink data channel determined on the basis of at least one of the times of transmission of the repeated transmissions of the uplink data channel or a period associated with the application of the second precoder.