SRS Time Bundling for Phase-Coherent Partial Frequency Sounding
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Solution Overview
Problem
Existing wireless communication systems, particularly 5G NR, face challenges in reliably using SRS time bundling due to issues with phase coherence and channel estimation under high-speed and high-capacity network conditions, which affect the signal-to-noise ratio and overall cell coverage.
Innovation Solution
The method involves transmitting a plurality of SRS signals at different times using an identical center frequency and multiple frequency resource allocations to maintain phase coherence, ensuring accurate channel state information and improved signal quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If SRS time bundling is used to increase coverage and signal-to-noise ratio, then cell coverage and signal quality are improved, but phase coherence is lost under high-speed network conditions
Solution Approach 1:
The patent applies dynamics by making the center frequency configurable and adaptable between different SRS transmissions. The system dynamically adjusts the center frequency parameter based on network conditions and bundling configuration, allowing the system to maintain phase coherence while achieving time bundling benefits. This dynamic parameter adjustment resolves the contradiction between improving signal-to-noise ratio through time bundling and maintaining phase coherence under varying network conditions.
2Measurement precision
If multiple frequency resource allocations are used in SRS time bundling, then channel state information accuracy is improved, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by introducing configurable parameters such as center frequency, frequency resource allocation patterns, and bundling time span. These parameters can be adjusted to optimize the balance between measurement precision and system complexity. The system changes parameters like center frequency and frequency allocation based on network conditions, allowing flexible configuration that achieves accurate channel state information without excessive complexity.
Solution Approach 2:
The patent applies segmentation by dividing the frequency spectrum into multiple resource allocations and time periods for SRS transmissions. Instead of using a single broad frequency allocation, the system segments the frequency resources into multiple smaller allocations that can be transmitted at different times. This segmentation improves channel state information accuracy by providing more granular frequency measurements while managing complexity through structured organization of the segmented transmissions.
Data Source
AI summary
Aspects for time bundling an SRS resource over a plurality of instances are disclosed. The apparatus may include a user equipment (UE). The user equipment may receive a configuration from a base station for time-bundling at least one sounding reference signal (SRS) resource. The time-bundling may be performed by the UE transmitting a plurality of SRS signals at different times using an identical center frequency and at least two different frequency resource allocations. The UE may transmit the plurality of SRS signals based on the configuration.