SRS Resource Configuration for Antenna Switching
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Solution Overview
Problem
Current SRS resource configuration for antenna switching and carrier switching in wireless communications is not flexible, leading to significant signaling overhead, especially in multi-TRP operations, where RRC reconfiguration is necessary for power control parameters and beam management.
Innovation Solution
The proposed solution involves extending the number of aperiodic and periodic/semi-persistent SRS resource sets, configuring power control parameters separately for each TRP, and using MAC-CE to activate/deactivate SRS resource sets dynamically, allowing for flexible triggering and reduced signaling overhead by associating power control parameters with specific TRPs and enabling interlaced or sequential SRS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of SRS resource sets is extended to support multi-TRP operations, then the flexibility and adaptability of the system is improved, but the device complexity and signaling overhead increase
Solution Approach 1:
The patent segments the SRS resource configuration by introducing separate parameter sets for different TRPs. Each SRS resource set is associated with a specific TRP through separate power control parameter configurations, allowing independent management of SRS resources for each transmission-reception point without requiring complete reconfiguration for multi-TRP operations
Solution Approach 2:
The patent creates a universal SRS resource set configuration that can function for both single-TRP and multi-TRP operations. By introducing a TRP-specific parameter association mechanism, the same SRS resource set framework can be universally applied across different TRP scenarios, eliminating the need for separate configuration systems
2Reliability
If RRC reconfiguration is used to update power control parameters for antenna switching, then the reliability of power control is improved, but the loss of time and signaling overhead increase
Solution Approach 1:
The patent enables dynamic switching between different power control parameter sets associated with different TRPs. The UE can dynamically select and apply the appropriate parameter set based on the active TRP without requiring time-consuming RRC reconfiguration, making the power control system adaptive and responsive to changing transmission conditions
Solution Approach 2:
The patent pre-configures multiple power control parameter sets associated with different TRPs before antenna switching occurs. When switching between TRPs, the UE can immediately apply the pre-configured parameter set for the target TRP, eliminating the need for real-time RRC reconfiguration and reducing time loss
3Adaptability or versatility
If separate power control parameters are configured for each TRP, then the adaptability to multi-TRP operations is improved, but the device complexity and configuration overhead increase
Solution Approach 1:
The patent merges the management of multiple TRP-specific parameter sets into a unified SRS resource set configuration framework. Multiple power control parameter sets are combined and managed through a single configuration structure that associates each parameter set with a specific TRP identifier, simplifying the overall configuration management while maintaining multi-TRP adaptability
Data Source
AI summary
Systems, apparatuses, methods, and computer-readable media are provided for SRS configuration for antenna switching and/or carrier switching. The described techniques may be used in multi-TRP and/or single TRP communication. Also described are techniques for beam configuration for SRS with antenna switching. For example, embodiments provide techniques for beam configuration/update for SRS antenna switching considering the beam change signaling received during the antenna switching procedure. Other embodiments may be described and claimed.