Multi-Beam SRS Transmission via Spatial Domain Filters
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Solution Overview
Problem
Existing wireless communication systems face limitations in communication flexibility and efficiency, particularly in the transmission of sounding reference signals (SRS) which are crucial for channel sounding and beam management.
Innovation Solution
The proposed solution involves a user equipment (UE) and a base station apparatus that transmit and receive sounding reference signals (SRS) based on multiple reference signal resource indices. In cases where one reference signal index is provided, a single SRS is transmitted or received, associated with a specific spatial domain transmission filter. When two reference signal indices are provided, two SRSs are transmitted or received, each associated with a different spatial domain transmission filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-beam SRS transmission is used, then the system structure is simple, but the communication flexibility and beam management capability are limited
Solution Approach 1:
The patent segments the SRS transmission into multiple beam instances, where each beam can be independently configured and transmitted. This allows the system to handle multiple beams simultaneously while maintaining manageable complexity through structured organization of beam parameters and resources.
Solution Approach 2:
The patent introduces a spatial dimension to SRS transmission by enabling multiple beams to operate concurrently in different spatial directions. This dimensional expansion from single-beam to multi-beam transmission significantly enhances communication flexibility and beam management capability without proportionally increasing system complexity.
2Measurement precision
If single SRS transmission is used, then the signaling overhead is low, but the channel sounding capability is insufficient
Solution Approach 1:
The patent merges multiple SRS transmissions across different beams into a unified resource allocation framework. By combining multiple beam configurations within a single resource block and using compact indexing mechanisms, the system achieves enhanced channel sounding capability while minimizing signaling overhead through efficient information packing.
3Adaptability or versatility
If multiple SRS transmissions are implemented, then the beam management capability is improved, but the resource allocation complexity increases
Solution Approach 1:
The patent employs parameter changes through the use of reference signal resource indices to dynamically indicate which beams should be transmitted. Instead of explicitly configuring each beam parameter individually, the system changes the indexing parameters to select from pre-configured beam sets, thereby improving beam management capability while reducing resource allocation complexity.
Data Source
AI summary
A user equipment (UE) is described. Receiving circuitry receives first information including one reference signal resource index or two reference signal resource indices; and second information including a sounding reference signal (SRS) resource. Transmitting circuitry transmits sounding reference signals. In a case that the first information includes one reference signal index, a first SRS is transmitted in a slot, the first SRS being associated with a spatial domain transmission filter corresponding to the reference signal index indicated in the first information. In a case that the first information includes two reference signal indices, a first SRS and a second SRS are transmitted. The first SRS is associated with a spatial domain transmission filter corresponding to a first reference signal index indicated in the first information. The second SRS is associated with a spatial domain transmission filter corresponding to a second reference signal index indicated in the first information.