Initial BWP Bandwidth Signaling for Multicast Reception

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Solution Overview

Problem

The bandwidth of the bandwidth part (BWP) configured by the network device for UEs in certain states is insufficient to meet the requirements for multicast service reception.

Innovation Solution

A method for UEs to determine and utilize the bandwidth of an initial BWP configured in the MIB or SIB1 for multicast information reception, based on indication information received from the network device, allowing for flexible bandwidth configuration even in non-connected states.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If the network device configures a small bandwidth BWP for UE in non-connected states, then power consumption and costs of the UE are reduced, but the bandwidth is insufficient to meet multicast service reception requirements

Engineering Contradiction:

Improvepower consumptionVSAvoidmulticast service reception capability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic BWP configuration where the network device can flexibly adjust the bandwidth of the initial BWP based on UE state and service requirements. When UE is in non-connected state and multicast service is needed, the network configures a larger initial BWP bandwidth through indication information, allowing the system to adapt bandwidth dynamically rather than using a fixed small configuration, thus resolving the contradiction between power consumption and service capability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the bandwidth parameter of the initial BWP by introducing indication information that carries bandwidth configuration data. The network device modifies the initial BWP bandwidth parameter according to whether the UE is in connected or non-connected state and whether multicast service is required, enabling the system to optimize both power consumption and service reception capability through parameter adjustment rather than fixed configuration.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the network device configures a large bandwidth BWP for UE, then multicast service reception requirements are satisfied, but costs and power consumption of the UE increase

Engineering Contradiction:

Improvemulticast service reception capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The system uses dynamic BWP configuration where bandwidth is adjusted based on UE state. When UE is in non-connected state, a larger initial BWP is configured to support multicast services, but when UE transitions to connected state, the bandwidth can be reduced. This dynamic adjustment ensures multicast service capability when needed while minimizing power consumption during normal operation.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The network device performs preliminary configuration of the initial BWP with appropriate bandwidth before the UE needs to receive multicast services. By pre-configuring the bandwidth parameter in the non-connected state, the system ensures that when multicast services are initiated, the UE already has the necessary bandwidth capability without needing to switch to a larger BWP, thus avoiding increased power consumption.

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the initial BWP bandwidth is increased for multicast reception in non-connected states, then multicast service requirements are satisfied, but system complexity increases due to flexible bandwidth configuration

Engineering Contradiction:

Improvemulticast service reception capabilityVSAvoidbandwidth configuration complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The indication information mechanism serves multiple functions: it conveys bandwidth configuration for initial BWP, indicates UE state (connected or non-connected), and signals multicast service availability. By using a single multi-functional indication mechanism rather than separate signaling for each parameter, the system achieves flexible bandwidth configuration for multicast services while minimizing the increase in system complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12538333B2Multicast information receiving method, indication information sending/receiving method, and related apparatus

Publication Date: 2026.01.27 HUAWEI TECH CO LTD

AI summary

This application provides a multicast information receiving method, an indication information sending/receiving method, and a related apparatus. The method includes: A first terminal apparatus receives first indication information from a network device; determines a first bandwidth of a first bandwidth part BWP based on the first indication information, where the first BWP is for receiving first multicast information, and the first bandwidth is a bandwidth configured in a master information block MIB or a system information block SIB1; and receives the first multicast information on the first bandwidth.