SRS Transmission for Multi-Panel UE with Panel Switching Delay
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting sounding reference signals (SRS) by multi-panel user equipment (UE) due to limitations in simultaneous transmission capabilities and panel switching delays, which affect the reliability and accuracy of downlink channel state information acquisition.
Innovation Solution
A method for transmitting SRS by UE, involving the transmission of UE capability information related to SRS transmission, configuration of SRS resource sets for each panel, and consideration of panel switching delays, allowing for reliable SRS transmission based on specific usage scenarios such as antenna switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multi-panel UE transmits SRS through multiple panels simultaneously, then downlink channel state information acquisition accuracy is improved, but device complexity and transmission reliability deteriorate due to panel switching delays and capability limitations
Solution Approach 1:
The patent segments the SRS transmission process by panel, where each panel has its own SRS resource set. The UE transmits SRS through multiple panels sequentially rather than simultaneously, dividing the complex multi-panel transmission into manageable panel-specific segments. This allows the base station to acquire channel state information for each panel separately while avoiding the complexity of simultaneous multi-panel transmission.
Solution Approach 2:
The patent applies preliminary action by having the UE report its panel switching capability and delay parameters to the base station before actual SRS transmission. The base station uses this advance information to configure appropriate SRS resource sets and timing, ensuring that panel switching delays are accounted for in the resource allocation, thereby maintaining transmission reliability.
2Reliability
If panel switching delay is considered in SRS resource configuration, then transmission reliability is improved, but resource configuration complexity increases
Solution Approach 1:
The patent changes the configuration parameters of SRS resource sets based on the UE's panel switching capability. Specifically, the base station configures the time offset between SRS transmissions of different panels to be greater than or equal to the panel switching delay parameter reported by the UE. This parameter adjustment ensures reliable transmission while maintaining straightforward configuration procedures.
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports its panel switching capability and delay parameters to the base station. The base station uses this feedback information to appropriately configure SRS resource sets, ensuring that the configuration accounts for the UE's specific capabilities without requiring complex manual adjustment.
3Measurement precision
If SRS resource sets are configured for each panel, then measurement precision is improved, but loss of time increases due to sequential transmission requirements
Solution Approach 1:
The patent applies dynamics by making the SRS resource configuration adaptive to the UE's panel switching capability. The base station configures the time offset between panels dynamically based on the reported switching delay, allowing the system to optimize the balance between measurement precision and time loss for each UE's specific capabilities.
Solution Approach 2:
The patent changes the time offset parameter of SRS resource sets to be equal to or greater than the panel switching delay. This parameter adjustment ensures that each panel has sufficient time to switch before transmitting SRS, maintaining measurement precision while minimizing the total time loss by using the minimum necessary offset.
Data Source
AI summary
A method for transmitting a sounding reference signal (SRS) by a terminal in a wireless communication system according to an embodiment of the present specification, comprises the steps of: transmitting UE capability information associated with transmission of a sounding reference signal (SRS) based on a specific usage; receiving configuration information associated with the transmission of the SRS; and transmitting the SRS.