SRS Resource Configuration with Downlink Reference Signal Association
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Solution Overview
Problem
In 5G systems, terminal devices cannot learn beam information related to cells receiving sounding reference signals (SRS), affecting SRS transmission efficiency.
Innovation Solution
Configuring SRS resources for terminal devices to be associated with downlink reference signals of cells, allowing terminal devices to determine beam information for efficient SRS transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the serving cell configures an SRS resource for the terminal device without associating it with a downlink reference signal, then the configuration process is simple, but the terminal device cannot learn beam information related to the receiving cell, which reduces SRS transmission efficiency
Solution Approach 1:
The patent applies preliminary action by pre-associating the SRS resource with a downlink reference signal during the configuration phase. The location management device includes information about the downlink reference signal in the SRS resource configuration, so that when the terminal device receives the configuration, it already has the beam information needed for efficient SRS transmission. This eliminates the need for separate beam information acquisition steps.
Solution Approach 2:
The downlink reference signal serves as an intermediary that carries beam information from the network to the terminal device. By associating the SRS resource with this reference signal, the terminal device can derive the beam information needed for uplink transmission without direct configuration of beam parameters, thus improving efficiency while maintaining configuration simplicity.
2Productivity
If the terminal device sends SRS without beam information, then the transmission process is straightforward, but the cell cannot effectively receive the SRS, reducing overall transmission efficiency
Solution Approach 1:
The patent implements feedback by using the downlink reference signal as a carrier of beam information that flows back to the terminal device from the network. The location management device determines the appropriate downlink reference signal based on network conditions and includes it in the SRS configuration, enabling the terminal device to send SRS with proper beam alignment information.
Solution Approach 2:
The downlink reference signal acts as an intermediary that transfers beam information from the network side to the terminal device. This reference signal contains or indicates the beam parameters needed for the terminal device to effectively transmit SRS, ensuring that the cell can receive the SRS efficiently without complex direct beam configuration.
Data Source
AI summary
A signal transmission method and an apparatus. The method includes: a location management device receives first SRS resource configuration information from a serving cell and/or a neighboring cell. The location management device sends second SRS resource configuration information to a terminal device, where the second SRS resource configuration information includes third SRS resource configuration information and a downlink reference signal associated with an SRS resource indicated by the third SRS resource configuration information, and the third SRS resource configuration information is a part or all of the first SRS resource configuration information. The location management device configures the SRS resource for the terminal device, so that the SRS resource can be associated with the downlink reference signal. This helps the terminal device obtain information about a transmission beam for sending an SRS, and therefore SRS receiving efficiency of the cell can be improved to some extent.