CSI Report Field Prioritization for Wireless Security

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Solution Overview

Problem

Current wireless communication systems face challenges in securing Channel State Information (CSI) reports, particularly at the physical layer, due to limited bit availability and collisions during simultaneous transmissions, leading to potential drops in CSI reports.

Innovation Solution

Implementing a CSI report field priority-based security scheme that selectively secures higher priority fields while leaving others unsecured, based on bit availability and priority, to prevent drops and enhance security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If CSI reports are secured using secret key bits, then security against eavesdropping is improved, but the available bits for CSI report transmission are reduced

Engineering Contradiction:

ImprovesecurityVSAvoidbit availability

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The CSI report is divided into multiple fields with different priority levels. High-priority fields (e.g., CRI, LI, RI) are secured using secret key bits, while low-priority fields (e.g., PMI, CQI) are left unsecured. This segmentation allows selective application of security measures to different parts of the CSI report based on their importance

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different security treatments are applied to different fields within the CSI report based on their priority. Critical fields receive full security protection while less critical fields are transmitted without security overhead, creating local variations in security quality matched to the importance of each field

Inventive Principle:

Principle #3Local quality

2Loss of information

If multiple CSI reports are transmitted simultaneously, then reporting completeness is improved, but collision and payload size constraints cause reports to be dropped

Engineering Contradiction:

Improvereporting completenessVSAvoidreport transmission reliability

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The system dynamically determines which CSI reports to transmit based on priority levels and available resources. When resource constraints or collisions occur, high-priority CSI reports are guaranteed transmission while lower-priority reports may be dropped, creating a dynamic prioritization mechanism that adapts to current system conditions

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

When the total payload size exceeds available resources, the system transmits only the essential high-priority fields of high-priority CSI reports, ensuring that critical information is delivered even if complete reporting cannot be achieved. This partial transmission approach prioritizes essential data over completeness

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11659585B1Channel state information report field prioritization scheme

Publication Date: 2023.05.23 QUALCOMM INC

AI summary

Disclosed are techniques for wireless communication. In an aspect, BS determines a channel state information (CSI) report field priority-based security scheme, and transmits CSI report field priority-based security scheme to UE. UE determines bit availability in CI (e.g., UCI or SCI or MAC CE) for transmission of a CSI report. UE configures, based on the CSI report field priority-based security scheme and the CI bit availability, the CSI report with first field(s) (e.g., secured with key) being secured via a key and second field(s) being unsecured (e.g., not secured with any key or secured with weaker key below strength threshold). UE transmits the CSI report to BS.