SRS Bandwidth Configuration for Collision-Free Uplink Channel Estimation
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Solution Overview
Problem
The increasing demand for faster and more efficient wireless communication systems faces challenges in managing explosive data traffic, high transmission rates, and low latency, particularly in configuring and indicating the transmission bandwidth of sounding reference signals (SRS) and uplink demodulation reference signals (DMRS) to enhance channel estimation accuracy and prevent resource collisions.
Innovation Solution
A method and apparatus for dynamically configuring frequency domain resource allocation for SRS, allowing for flexible and low-latency channel estimation, reusing frequency resources with good channel quality, and applying time domain bundling with DMRS to maintain estimation accuracy even with fewer allocated resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the transmission bandwidth of SRS is dynamically configured based on frequency resource allocation information for PUSCH, then channel estimation accuracy and resource utilization are improved, but system complexity increases
Solution Approach 1:
The patent applies dynamics by making the SRS transmission bandwidth configurable and adaptable based on PUSCH frequency resource allocation. The system dynamically adjusts SRS bandwidth to match actual channel conditions and resource needs, allowing the bandwidth parameter to change flexibly according to traffic demands and channel states, thereby improving measurement precision without requiring complete system redesign
Solution Approach 2:
The patent changes the bandwidth parameter of SRS from a fixed value to a dynamically adjustable parameter. By modifying the bandwidth parameter based on PUSCH frequency resource allocation information, the system optimizes channel estimation accuracy for different resource scenarios while managing complexity through parameter control rather than structural changes
2Measurement precision
If time domain bundling is applied between SRS and uplink demodulation reference signal, then channel estimation accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent merges SRS and uplink demodulation reference signal in the time domain by applying time domain bundling. This combining approach allows the system to leverage multiple reference signals for channel estimation, improving accuracy through aggregated measurements while managing processing complexity through unified time-domain handling of the bundled signals
3Productivity
If SRS transmission bandwidth is dynamically adjusted, then resource utilization efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring bandwidth part information and SRS frequency resource allocation parameters. The base station prepares and signals the terminal with possible bandwidth configurations and resource allocation rules in advance, enabling dynamic bandwidth adjustment without requiring extensive real-time signaling for each change, thus improving resource utilization while controlling signaling overhead
Data Source
AI summary
Disclosed are a method and a device for transmitting or receiving a sounding reference signal (SRS) in a wireless communication system. A method for transmitting a sounding reference signal (SRS) according to an embodiment of the present disclosure may comprise the steps of: receiving, from a base station, downlink control information (DCI) for scheduling a physical uplink shared channel (PUSCH) and triggering transmission of the SRS; and transmitting the PUSCH and the SRS to the base station on the basis of the DCI. A transmission bandwidth of the SRS may be determined on the basis of frequency resource allocation information for transmission of the PUSCH.