Location-Hopped SRS Subbands for Complete Frequency Coverage
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Solution Overview
Problem
The existing SRS design in Rel-15 and Rel-16 wireless communication systems is deficient in terms of frequency hopping, leading to inefficiencies and interference, particularly in unlicensed NR and NR positioning, which affects the quality of communication.
Innovation Solution
Implementing frequency hopping enhancement for RB-level partial frequency sounding by introducing a location hopping parameter for SRS transmission occasions, allowing UEs to perform partial sounding across multiple transmission occasions, thereby ensuring effective coverage of the entire frequency range and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If frequency hopping enhancement is implemented for SRS transmission, then anti-interference effect is improved, but device complexity increases due to location hopping parameter management
Solution Approach 1:
The patent applies parameter changes by introducing a location hopping parameter that dynamically adjusts the frequency location of SRS transmission across different transmission occasions. This parameter modification enables the system to hop between different frequency subbands, thereby achieving frequency diversity and improving anti-interference capability without requiring fundamental system restructuring
Solution Approach 2:
The patent implements dynamics by making the SRS frequency location dynamic rather than static. The location hopping parameter causes the SRS transmission frequency to change over time across different transmission occasions, allowing the system to adapt to varying interference conditions and achieve better reliability through temporal and spectral diversity
2Reliability
If partial frequency sounding is used to reduce interference, then communication quality is improved, but frequency range coverage is insufficient without frequency hopping
Solution Approach 1:
The patent applies segmentation by dividing the total frequency range into multiple subbands and using partial frequency sounding to sound only a subset of these subbands in each transmission occasion. The location hopping parameter determines which specific subband is sounded at each occasion, allowing the system to cover the entire frequency range progressively across multiple transmissions while maintaining reduced interference levels
Solution Approach 2:
The patent implements continuity of useful action by ensuring that across multiple SRS transmission occasions with different location hopping parameters, the cumulative coverage of sounded subbands progressively encompasses the entire frequency range. This continuous partial sounding approach maintains improved communication quality while achieving complete frequency coverage over time
Data Source
AI summary
Provided is a method for a base station, includes: generating, for transmission to at least one UE, control information associated with SRS transmission, wherein the control information indicates an SRS band including a plurality of RBs for the SRS transmission, the control information indicates a first subband for a first UE and a second subband for a second UE in a same SRS band for an SRS transmission occasion; receiving, from the at least one UE, SRS on a plurality of SRS transmission occasions according to the control information, wherein a location hopping parameter is applied to the plurality of SRS transmission occasions, wherein a first starting location of the first subband for the first UE on a first SRS transmission occasion and a second starting location of the first subband for the first UE on a second SRS transmission occasion are determined based on the location hopping parameter.