SRS Resource Set Selection for Carrier Switching in 5G
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the 5G mobile communications system, the selection of SRS resource sets for SRS carrier switching is uncertain, leading to improper resource allocation, reduced channel information acquisition, and decreased system transmission rates due to limited configuration flexibility and power control adjustments.
Innovation Solution
The method involves user equipment selecting SRS resource sets based on predefined rules configured by the network side device for SRS carrier switching scenarios, allowing for flexible and timely power control adjustments across multiple SRS resource sets, enhancing channel state information acquisition and system transmission rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple SRS resource sets are configured for Carrier Aggregation, then the system can support more carriers and functions, but the selection uncertainty leads to improper resource allocation and reduced transmission rate
Solution Approach 1:
The patent changes the parameter of SRS resource set selection by introducing a predefined selection rule based on usage types and carrier aggregation configurations. Instead of uncertain selection, the system now deterministically selects SRS resource sets according to specific criteria (e.g., selecting from beam management, codebook-based, or non-codebook-based transmission sets based on the activated uplink carrier), thereby resolving the contradiction between configuration flexibility and transmission rate.
2Adaptability or versatility
If SRS resource sets are configured without clear selection rules, then configuration flexibility is maintained, but channel information acquisition becomes incomplete and resource waste occurs
Solution Approach 1:
The patent applies preliminary action by pre-defining selection rules for SRS resource sets before actual transmission occurs. The network configures multiple SRS resource sets with different usage types in advance, and the UE is pre-instructed on how to select among them based on which uplink carrier is activated. This preliminary configuration ensures that the correct SRS resource set is always selected, preventing channel information loss while maintaining configuration flexibility.
3Adaptability or versatility
If SRS carrier switching is enabled without predefined selection rules, then adaptability across carriers is improved, but resource allocation becomes improper leading to resource waste
Solution Approach 1:
The patent resolves this contradiction by changing the selection parameter from uncertain to deterministic. When SRS carrier switching is enabled, the system now uses predefined rules that consider the usage type of SRS resource sets and which uplink carrier is activated to deterministically select the appropriate SRS resource set. This ensures proper resource allocation while maintaining carrier switching adaptability, preventing resource waste.
Data Source
AI summary
The present disclosure provides sounding reference signal transmission and configuration methods, user equipment, and a network side device. The method for sounding reference signal (SRS) transmission includes receiving uplink resources of at least one cell from a network side device, where the uplink resources of each of the at least one cell comprise one or more SRS resource sets. The method further includes selecting, according to a predefined rule, at least one SRS resource set of each of the at least one cell for sending, when in a scenario in which an SRS switches between carriers for sending, where the scenario is configured by the network side device.