SRS Resource Indicator for Uplink Data Transmission

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Solution Overview

Problem

In existing communication technologies, User Equipment (UE) cannot determine the specific implementation process for Uplink (UL) data transmission due to limitations in utilizing UL Sounding Reference Signal (SRS) resources, which affects the efficiency of UL data transmission.

Innovation Solution

A data transmission method that involves configuring and transmitting SRS resource configuration information, determining and indicating SRS Resource Indicators (SRI) and Transmission Rank Indicators (TRI) to optimize the use of SRS resources for each layer of UL data transmission, ensuring consistent beam forming matrices and resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If UL SRS resources are configured for beam forming training, then beam alignment capability is improved, but UE cannot determine specific UL data transmission implementation process

Engineering Contradiction:

Improvebeam alignment precisionVSAvoidUL data transmission implementation information

Core Design Contradiction:

Measurement precisionVSLoss of information

Solution Approach 1:

The network side device sends SRI (SRS Resource Indicator) to the UE based on measured SRS signals, providing feedback information that indicates which SRS resources should be used for UL data transmission. This feedback mechanism enables the UE to determine the specific transmission implementation process by receiving the SRI that maps to appropriate SRS resources and beam forming matrices.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The SRS Resource Indicator (SRI) acts as an intermediary that bridges the gap between SRS resource configuration and UL data transmission implementation. The SRI contains information that indirectly indicates the UL data transmission process by pointing to specific SRS resources, which in turn indicate the beam forming matrices to be used.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple SRS resources are configured for different layers, then UL MIMO capability is improved, but resource allocation complexity increases

Engineering Contradiction:

ImproveUL MIMO capabilityVSAvoidresource allocation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The SRS resources are segmented and associated with different layers of UL MIMO transmission. Each SRS resource can be independently configured and indicated through SRI, allowing the system to selectively activate specific resources for specific layers, thereby managing complexity through structured segmentation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The SRI mechanism serves multiple functions: it indicates SRS resources for beam forming, implies UL data transmission layer configuration, and guides beam forming matrix selection. This multi-functionality reduces the need for separate signaling mechanisms, thereby managing complexity while maintaining versatility.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If beam forming weights are adjusted for optimal transmission, then transmission quality is improved, but signaling overhead increases

Engineering Contradiction:

Improvetransmission qualityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

Instead of signaling explicit beam forming weight values, the patent extracts the essential information by using SRI to indicate pre-configured SRS resources. The beam forming weights are implicitly determined through the SRI-SRS resource-matrix chain, eliminating the need to transmit the actual weight values and reducing signaling overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

Beam forming weights are pre-configured and stored in both the network side device and UE before actual data transmission. The SRI points to these pre-configured SRS resources that contain the weight information, allowing the system to use optimal beam forming without real-time signaling of weight values.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3629510B1Data transmission method, device, network-side equipment and user equipment

Publication Date: 2022.05.04 DATANG MOBILE COMM EQUIP CO LTD

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AI summary

Embodiments of the present disclosure provide a data transmission method, a data transmission device, a network side device and UE. The data transmission method is applied to a first device and includes: transmitting Uplink (UL) Sounding Reference Signal (SRS) resource configuration information to a second device, where the SRS resource configuration information indicates K SRS resources; receiving an SRS signal transmitted from the second device according to the SRS resource configuration information; determining an SRS Resource Indicator (SRI), where the SRI indicates L SRS resources in the K SRS resources, L is an integer that is larger than or equals 1 and L is less than or equals K; and transmitting the SRI to the second device.