5G Paging BWP Selection Across Multiple Initial BWPs

Solution Overview

Problem

In a 5G mobile communication system, when there are multiple initial bandwidth parts (BWPs) with different bandwidths, the access network device cannot determine the appropriate BWP for sending paging messages to terminal devices, particularly for Machine Type Communication (MTC) devices that do not support broader bandwidths like 10M and 20M.

Innovation Solution

The terminal device receives first indication information from the access network, allowing it to determine a target BWP from among multiple initial BWPs, and monitors paging messages in that BWP, while the access network sends paging messages to the determined target BWP.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple initial BWPs are configured to support different bandwidth requirements, then the adaptability to terminal devices is improved, but the complexity of determining the correct BWP for paging increases

Engineering Contradiction:

Improveadaptability to terminal devicesVSAvoidcomplexity of determining correct BWP

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The access network device performs preliminary action by sending first indication information to the terminal device before the terminal device needs to camp on an initial BWP. This indication information pre-configures which BWP the terminal device should use, eliminating the need for complex real-time determination processes and ensuring the terminal device camps on the correct BWP without ambiguity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system establishes a feedback mechanism where the access network device sends indication information about the target BWP to the terminal device. This feedback loop ensures that the terminal device receives explicit guidance on which BWP to use for camping and paging, resolving the complexity of determining the correct BWP among multiple options.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If multiple initial BWPs are configured with different bandwidths, then the flexibility of the system is improved, but the reliability of paging message delivery decreases

Engineering Contradiction:

Improveflexibility of the systemVSAvoidreliability of paging message delivery

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The access network device performs preliminary action by sending first indication information to the terminal device before the terminal device needs to camp on an initial BWP. This indication information pre-configures which BWP the terminal device should use, eliminating the need for complex real-time determination processes and ensuring the terminal device camps on the correct BWP without ambiguity.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system establishes a feedback mechanism where the access network device sends indication information about the target BWP to the terminal device. This feedback loop ensures that the terminal device receives explicit guidance on which BWP to use for camping and paging, resolving the complexity of determining the correct BWP among multiple options.

Inventive Principle:

Principle #23Feedback

3Use of energy by moving object

If a narrower BWP is used for MTC terminal devices, then the energy consumption is reduced, but the bandwidth availability for paging is limited

Engineering Contradiction:

Improveenergy consumptionVSAvoidbandwidth availability

Core Design Contradiction:

Use of energy by moving objectVSQuantity of substance

Solution Approach 1:

The system applies local quality by configuring different BWPs with different bandwidth characteristics for different purposes. A narrower BWP is allocated specifically for MTC terminal devices that require energy efficiency, while wider BWPs are available for other terminal types. The access network device sends indication information to ensure MTC devices use the appropriate narrower BWP, optimizing energy consumption while maintaining sufficient bandwidth availability through proper BWP selection.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12408146B2Communication method and apparatus

Publication Date: 2025.09.02 HUAWEI TECH CO LTD

AI summary

A communication method includes receiving, by a terminal device, first indication information from an access network device, determining a target bandwidth part (BWP) from a plurality of initial BWPs based on the first indication information, and monitoring a paging message in the target BWP. The plurality of initial BWPs are useable to page the terminal device that has not established a radio resource control (RRC) connection to the access network device.