Multi-Cell SRS Resource Selection Using DCI Bit Mapping
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Solution Overview
Problem
Existing mobile communication systems face challenges in effectively determining SRS resources when multi-cell or multi-carrier scheduling is applied, which affects the efficiency and performance of wireless communication systems.
Innovation Solution
A method and device for determining SRS resources through higher layer signaling and downlink control information (DCI) that includes an SRS request field, allowing for the identification and transmission of SRS resources across multiple cells, with specific bit associations for different cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-cell scheduling is applied to improve wireless communication efficiency, then service coverage and data transmission capability are enhanced, but SRS resource determination complexity increases
Solution Approach 1:
The SRS resource determination is segmented by associating different bit fields in the DCI with different cells. Each cell has its own dedicated bit field (e.g., 2 bits per cell) that independently controls SRS resource selection for that specific cell, breaking down the complex multi-cell resource management into manageable cell-specific units
Solution Approach 2:
The patent introduces a new dimensional approach by using higher layer signaling to pre-configure multiple SRS resource sets and then using DCI bit fields to dynamically select among them. This adds a layer of abstraction that simplifies the control mechanism while maintaining multi-cell scheduling capability
2Measurement precision
If SRS resources are determined through higher layer signaling and DCI, then SRS transmission accuracy is improved, but signaling overhead increases
Solution Approach 1:
Different levels of signaling are used for different aspects of SRS resource determination. Higher layer signaling provides stable, semi-static configuration of SRS resource sets (local quality for resource pool definition), while DCI provides dynamic, cell-specific selection (local quality for immediate resource allocation), optimizing the balance between accuracy and overhead
3Adaptability or versatility
If multiple SRS resources are configured for multiple cells, then multi-cell service capability is enhanced, but resource management complexity increases
Solution Approach 1:
The DCI structure is designed with universal applicability across multiple cells. Each cell has its own bit field following a consistent pattern (e.g., 2 bits per cell), allowing the same resource determination mechanism to be universally applied to any number of cells. This multi-functional design enables the system to handle different cell configurations without requiring fundamentally different resource management approaches
Data Source
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AI summary
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a terminal in a communication system according to an embodiment may comprise the steps of: receiving information on sounding reference signal (SRS) resource configuration through higher layer signaling; receiving downlink control information (DCI) for scheduling a plurality of cells, wherein the DCI includes an SRS request field; identifying a plurality of SRS resources for the plurality of cells on the basis of the information on the SRS resource configuration and a code point of the SRS request field; and transmitting an SRS for the plurality of cells on the basis of the plurality of SRS resources.