Nominal Time Domain Window Configuration for Wireless Uplink Signals
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently joint channel estimation due to differences in channel environments between sub-band full duplex (SBFD) and half duplex (HD) time durations.
Innovation Solution
A method and device for transmitting uplink signals by configuring a nominal time domain window (TDW) based on resource allocation information and channel environment differences, allowing for bundling of demodulation reference signals (DMRS) to enhance joint channel estimation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If DMRS bundling is performed across SBFD and HD time durations without distinction, then resource utilization is simplified, but joint channel estimation efficiency deteriorates due to different channel environments
Solution Approach 1:
The patent segments the time domain window into multiple separate TDWs based on the boundary between SBFD and HD time durations. Instead of using a single unified TDW for DMRS bundling across both duplex modes, the system configures distinct TDWs for SBFD periods and HD periods. This segmentation allows channel estimation to be performed separately for each duplex mode, accounting for their different channel characteristics, thereby improving joint channel estimation efficiency while managing complexity through structured configuration.
2Measurement precision
If a single TDW is used for all UL time resources, then configuration overhead is reduced, but channel estimation accuracy worsens due to varying channel environments in SBFD and HD periods
Solution Approach 1:
The patent applies local quality by configuring TDW parameters differently for different time domain regions. Specifically, the TDW configuration is adapted to match the local channel characteristics of either SBFD or HD periods. This allows the system to optimize channel estimation accuracy for each specific duplex mode by using appropriate TDW settings tailored to their respective channel environments, rather than applying a uniform configuration across all time resources.
3Reliability
If DMRS bundling is performed without considering SBFD/HD boundaries, then transmission continuity is maintained, but channel estimation reliability deteriorates due to environmental differences
Solution Approach 1:
The patent implements preliminary action by pre-configuring the TDW boundaries corresponding to SBFD and HD time duration transitions. The UE is provided with configuration information that defines where these boundaries occur in advance, allowing the device to proactively adjust its DMRS bundling behavior at the appropriate boundaries. This preliminary configuration enables reliable channel estimation by ensuring that bundling operations respect the environmental transitions between duplex modes, while avoiding the need for complex real-time boundary detection during transmission.
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AI summary
Disclosed are a method for a terminal to transmit an uplink signal and a device for same in a wireless communication system according to various embodiments. Disclosed are a method and a device for same, the method comprising the steps of: receiving resource allocation information about a plurality of uplink time resources from a base station; receiving configuration information about a nominal time domain window (TDM); and transmitting demodulation reference signal (DMRS)-bundled uplink signals in the plurality of uplink signal resources on the basis of the nominal TDW, wherein the plurality of uplink time resources include a first uplink time resource and a second uplink time resource differentiated on the basis of whether there is overlap with a downlink time resource, and the nominal TDW is set on the basis of the boundary between the first uplink time resource and the second uplink time resource.