Flexible Cell Carrier Selection for Paging

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Solution Overview

Problem

Current wireless communication systems, particularly in 5G NR, face challenges in efficiently managing carrier selection for paging messages in flexible cells, which can lead to increased signaling overhead and complex cell management, affecting power consumption and user equipment (UE) operation.

Innovation Solution

The system provides a method for a UE and a base station to receive and transmit indications to monitor specific carriers within a flexible cell, comprising an anchor carrier and non-anchor carriers, for paging messages associated with a physical downlink control channel (PDCCH) that schedules a physical downlink shared channel (PDSCH, allowing for optimized carrier selection and reduced signaling overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE monitors multiple carriers in a flexible cell for paging messages, then the reliability of paging reception is improved, but the power consumption and device complexity increase

Engineering Contradiction:

Improvepaging reception reliabilityVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The flexible cell is segmented into anchor carriers and non-anchor carriers. The UE is configured to monitor paging messages on anchor carriers, which are specifically designated for this purpose, rather than monitoring all carriers. This segmentation allows reliable paging reception while reducing power consumption by limiting monitoring to essential carriers only.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Anchor carriers serve as intermediary carriers that specifically handle paging message transmission. By introducing this intermediary layer, the system enables reliable paging delivery without requiring the UE to monitor all non-anchor carriers, thus reducing power consumption while maintaining paging reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If the system uses flexible cells with multiple carriers for paging, then the adaptability of the network is improved, but the signaling overhead and cell management complexity increase

Engineering Contradiction:

Improvenetwork adaptabilityVSAvoidcell management complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The cell structure is segmented into anchor carriers and non-anchor carriers with clearly defined roles. Anchor carriers are specifically configured for paging and system information, while non-anchor carriers handle data traffic. This segmentation simplifies cell management by establishing clear functional boundaries, reducing the complexity of managing flexible cells with multiple carriers.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of having all carriers potentially handle paging messages, the system inverts the approach by designating specific anchor carriers exclusively for paging and system information. This inversion simplifies the management logic by clearly separating paging-related functions from data transmission functions, reducing signaling overhead and management complexity.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS20240397481A1Carrier selection for paging on flexible cell

Publication Date: 2024.11.28 QUALCOMM INC

AI summary

Method and apparatus for carrier selection for paging on a flexible cell. The apparatus receives an indication to monitor at least one carrier from a flexible cell for a paging message. The flexible cell comprising an anchor carrier and one or more non-anchor carriers. The apparatus monitors a first carrier from the flexible cell for the paging message based on the indication, the paging message associated with a PDCCH that schedules a PDSCH. The apparatus may receive, from the flexible cell, a downlink BWP configuration for the anchor carrier and the one or more non-anchor carriers.