DMRS Time Domain Position Configuration in Special Slots
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Solution Overview
Problem
In communication systems, determining the time domain position of a demodulation reference signal (DMRS) in a special slot is challenging, especially when uplink slot resources are insufficient, leading to communication delays and inefficient coding.
Innovation Solution
A method and apparatus for configuring the time domain position of a DMRS, where a user equipment (UE) determines an available symbol in a special slot and acquires parameters from a base station to determine a symbol resource and DMRS symbol offset values, ensuring the DMRS position is always available, avoiding resource waste, and improving encoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink slot resources are insufficient and special slot is used for uplink TBoMS communication, then communication delay is reduced and coding efficiency is improved, but determining the time domain position of DMRS becomes challenging and may lead to resource waste
Solution Approach 1:
The patent changes the parameter of DMRS position determination from fixed to dynamic by introducing offset values (a0, a1, a2) that can be flexibly configured based on available symbols in the special slot. This allows the system to adapt to different slot configurations while maintaining efficient resource utilization and avoiding complexity from multiple determination methods.
2Reliability
If DMRS position is not properly configured in special slot, then resource waste occurs and communication reliability decreases, but flexible configuration increases system complexity
Solution Approach 1:
The patent applies preliminary action by pre-configuring offset values (a0, a1, a2) through higher layer signaling before actual DMRS transmission. This allows the UE to quickly determine valid DMRS positions without real-time complex calculations, ensuring reliable communication while keeping the configuration process simple and efficient.
3Loss of substance
If traditional DMRS position determination method is used in special slot, then resource waste occurs due to unavailable symbols, but new determination method increases processing complexity
Solution Approach 1:
The patent implements feedback by using higher layer signaling to provide offset values that reflect the actual available symbol configuration in special slots. This feedback mechanism ensures that DMRS positions are accurately determined based on real resource availability, preventing resource waste while simplifying the detection process through pre-calculated offset values.
Data Source
AI summary
A method for configuring a time domain position of a reference signal is performed by a user equipment (UE), and includes: determining an available symbol in a special slot, and acquiring a parameter configured and/or indicated by a base station; determining a symbol resource for data communication in the special slot and at least one first demodulation reference signal (DMRS) symbol offset value based on the parameter; and determining a first time domain position of a DMRS based on a first available symbol in the symbol resource and the at least one first DMRS symbol offset value.