SRS Start RB Hopping for Full Partial Frequency Sounding
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Solution Overview
Problem
Existing partial frequency sounding methods in wireless communications, particularly in NR Release 16, suffer from deteriorated channel estimation accuracy due to power boosting in narrow bands, especially with large partial frequency sounding factors, leading to incomplete coverage of allocated frequency resources.
Innovation Solution
Implementing start RB location hopping patterns for SRS resources, where the start RB location is determined by a configured pattern or hopping pattern ID, allowing SRS transmission on partial frequency bands across multiple hops, ensuring comprehensive coverage of allocated frequency resources while maintaining power boosting gains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If partial frequency sounding is used to improve SRS capacity, then SRS capacity is improved, but channel estimation accuracy deteriorates due to power boosting in narrow bands
Solution Approach 1:
The frequency band is segmented into multiple subbands, and the SRS transmission is divided into multiple hops, each covering a different subband. This segmentation allows the system to sound the entire frequency band while maintaining power boosting in each subband, thus improving SRS capacity without sacrificing channel estimation accuracy.
Solution Approach 2:
The patent implements periodic frequency hopping across multiple SRS transmissions. Each SRS transmission sounds a different subband, and over a period of multiple transmissions, all subbands are covered. This periodic action ensures comprehensive frequency coverage while maintaining power boosting in each individual transmission, resolving the contradiction between SRS capacity and channel estimation accuracy.
2Reliability
If power boosting is applied in narrow bands to improve signal quality, then signal quality is improved, but frequency resource coverage becomes incomplete
Solution Approach 1:
The patent introduces dynamic frequency hopping where the SRS transmission frequency location changes periodically across different transmissions. This dynamic approach allows the system to concentrate power in narrow bands for each transmission (improving signal quality) while ensuring that over time, all frequency resources are covered (improving frequency resource coverage).
Solution Approach 2:
By implementing periodic frequency hopping, the system alternates between different subbands in a systematic manner. Each periodic transmission boosts power in a specific narrow band for reliable signal quality, while the periodic progression across all subbands ensures complete frequency resource coverage over time.
Data Source
AI summary
Methods and apparatuses for partial frequency sounding with start RB location hopping are disclosed. A method comprises receiving a configuration on start RB location hopping pattern for an SRS resource configured with partial frequency sounding and with hops in each frequency hopping (FH) period, wherein the start RB location hopping pattern for partial frequency sounding factor PF has PF elements, and each element in the start RB location hopping pattern is selected from a set of values {0, 1, . . . , PF−1}; and determining the start RB location for each hop in each frequency hopping (FH) period according to the start RB location hopping pattern.