CSI Resource Allocation for Low-Latency Channel State Acquisition

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Solution Overview

Problem

Existing methods for Channel State Information (CSI) acquisition in wireless communication systems suffer from high latency and resource overhead due to multiple transmissions of requests and grants for CSI-RS and CSI reporting, leading to outdated CSI and inefficient link adaptation.

Innovation Solution

A method for allocating resources for CSI transmission that includes determining and transmitting both CSI-RS and CSI report resources simultaneously, reducing the need for explicit requests and grants, and utilizing periodic allocations to minimize latency and control overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple transmissions of requests and grants are used for CSI-RS and CSI reporting, then resource allocation is explicit and reliable, but latency increases and resource overhead increases

Engineering Contradiction:

Improveresource allocation reliabilityVSAvoidCSI acquisition latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent combines the CSI-RS transmission and CSI report transmission resource allocations into a single resource allocation message from the base station to the UE. This merging eliminates the need for separate request-grant exchanges for each transmission, thereby reducing latency while maintaining allocation reliability through the unified control mechanism.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The base station performs preliminary resource allocation for both CSI-RS and CSI report transmissions in advance, before the actual transmissions occur. This preliminary action eliminates the need for sequential request-grant exchanges during the critical timing window, reducing latency while ensuring reliable resource allocation through pre-configured parameters.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If multiple transmissions of requests and grants are used for CSI-RS and CSI reporting, then resource allocation is explicit and reliable, but control overhead increases

Engineering Contradiction:

Improveresource allocation reliabilityVSAvoidcontrol signal overhead

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple control signals (CSI-RS resource allocation and CSI report resource allocation) into a single control message transmitted from the base station. This consolidation reduces the total number of control signals that need to be processed, thereby reducing control overhead while maintaining allocation reliability through the integrated control structure.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The single resource allocation message serves multiple functions: it allocates resources for both CSI-RS transmission and CSI report transmission simultaneously. This multi-functionality eliminates the need for separate dedicated control messages for each transmission type, reducing overall control overhead while ensuring reliable allocation through comprehensive control parameters.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If traditional request-grant exchange is used for CSI reporting, then resource allocation is flexible, but processing burden increases

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidUE processing burden

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The base station performs preliminary determination of resource allocations for both CSI-RS and CSI report transmissions before the UE needs to process them. This preliminary action shifts the computational burden to the base station's scheduling process, reducing the real-time processing burden on the UE while maintaining allocation flexibility through pre-configured resource parameters.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent combines the resource allocation determination for CSI-RS and CSI report into a single processing operation at the base station. This merging consolidates the scheduling logic, reducing the number of separate processing steps that would otherwise increase UE processing burden, while maintaining flexibility through the unified allocation framework.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12432032B2Channel state information acquisition

Publication Date: 2025.09.30 JRD COMM (SHENZHEN) LTD

AI summary

Methods of allocating resources for Channel State Information, CSI, transmission, comprising the steps of receiving, from a transmitter User Equipment, a request for resources for transmission of a Channel State Information Reference Signal, CSI-RS; determining, in response to receiving the request for transmission of a CSI-RS, a first resource allocation for CSI-RS transmission; determining, in response to receiving the request for transmission of a CSI-RS, a second resource allocation for a CSI report transmission; and transmitting, to the transmitter User Equipment, the first resource allocation and the second resource allocation.