CFR Determination for MBS in Non-RRC Connected Mode

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Solution Overview

Problem

The determination of common frequency resources (CFR) for multicast and broadcast services (MBS) in wireless communication systems is unclear, leading to low resource utilization and high terminal power consumption.

Innovation Solution

A method and apparatus for determining CFR in non-radio resource control (non-RRC) connected mode, where the frequency location corresponds to either a first frequency location based on a common control resource set (CORESET) or a second frequency location based on a downlink bandwidth part (BWP) configured for the terminal, improving resource utilization and reducing power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the CFR determination method is unclear in related technologies, then the system has flexibility in implementation, but resource utilization is low and terminal power consumption is high

Engineering Contradiction:

Improveresource utilizationVSAvoidterminal power consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent applies parameter changes by establishing specific determination rules for CFR based on terminal states (RRC connected vs. non-connected modes) and service types (MBS vs. other services). The frequency location parameters are dynamically adjusted according to these conditions, transforming the unclear CFR determination into a structured parameter-based decision process that improves resource utilization while reducing terminal power consumption through targeted frequency selection

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent implements dynamics by making the CFR frequency location adaptive to different terminal operational states. The system dynamically selects between first frequency location (based on CORESET) and second frequency location (based on downlink BWP) depending on whether the terminal is in RRC connected or non-connected mode, creating a flexible yet deterministic CFR determination mechanism that resolves the contradiction between resource utilization and power consumption

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the CFR frequency location is not clearly determined, then the system can adapt to different scenarios, but leads to frequent frequency location switching and high power consumption

Engineering Contradiction:

Improvescenario adaptabilityVSAvoidfrequency location switching

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The patent uses parameter changes to resolve the contradiction by defining distinct frequency location parameters for different terminal states. The first frequency location (CORESET-based) and second frequency location (BWP-based) are clearly differentiated, allowing the system to adapt to various scenarios through parameter selection rather than frequent switching, thereby reducing operational complexity and power consumption

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies preliminary action by pre-determining the CFR frequency location based on the terminal's current state before MBS transmission begins. By establishing the frequency location in advance according to whether the terminal is in RRC connected or non-connected mode, the system avoids frequent switching during operation, making the system both adaptable and easy to operate

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If the CFR determination is ambiguous, then implementation flexibility is maintained, but network resource utilization efficiency decreases

Engineering Contradiction:

ImproveCFR determination complexityVSAvoidnetwork resource utilization

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The patent resolves this contradiction through parameter changes by introducing a structured determination framework that selects between different frequency location parameters based on terminal state and service type. This transforms the ambiguous CFR determination into a clear parameter-based decision process, improving network resource utilization while maintaining manageable determination complexity through systematic parameter selection

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies segmentation by dividing the CFR determination process into distinct segments based on terminal operational modes. The first frequency location determination (for RRC connected mode) and second frequency location determination (for non-connected mode) are clearly segmented, allowing the network to efficiently allocate resources in each segment without confusion, thereby improving overall resource utilization while keeping the determination process organized and manageable

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS20240397532A1Methods for determining CFR, and communication device and storage medium

Publication Date: 2024.11.28 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

Provided in the embodiments of the present disclosure is a method for determining a CFR for receiving an MBS. The method is performed by a terminal, and includes: determining the CFR for receiving the MBS in a non-radio resource control (non-RRC) connected mode; where a frequency location of the CFR corresponds to at least one of: a first frequency location determined based on a common control resource set (CORESET); or a second frequency location determined based on a downlink bandwidth part (BWP) configured for the terminal.