Paging Message Segmentation for UE Power Reduction

Solution Overview

Problem

In 5G wireless communication, user equipment (UE) in a connected state wastes power and increases complexity by constantly decoding paging physical downlink control channels (PDCCH) to check for system broadcast changes, even when no changes are present.

Innovation Solution

A wireless communication method where a network device sends first indication information to the UE about the presence of system broadcast change indication information in the paging message, allowing the UE to determine whether to receive and decode the paging message, thereby reducing unnecessary decoding and power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the UE in connected state decodes the paging PDSCH to obtain change indication information of system broadcast, then the UE can acquire updated system broadcast information, but the power consumption and complexity of the UE increases

Engineering Contradiction:

Improvesystem broadcast information acquisitionVSAvoidUE power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent extracts the change indication information from the paging message structure, placing it in a separate short message (paging PDCCH) that can be decoded independently. This allows the UE to obtain change indication information without decoding the entire long paging message (paging PDSCH), thereby reducing power consumption while maintaining reliability of system broadcast information acquisition.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent implements partial decoding by allowing the UE to decode only the essential short message portion of the paging message that contains change indication information, rather than decoding the complete paging message. This partial action approach reduces the computational burden and power consumption while still achieving the necessary function of detecting system broadcast changes.

Inventive Principle:

Principle #16Partial or excessive action

2Reliability

If the UE always decodes the paging PDSCH to verify change indication information, then the UE ensures it has the latest system broadcast information, but the complexity of the UE increases

Engineering Contradiction:

Improvesystem broadcast information verificationVSAvoidUE decoding complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the paging message into two distinct parts: a short message (paging PDCCH) containing change indication information and a long message (paging PDSCH) containing full paging content. The UE only needs to decode the short message to verify system broadcast changes, significantly reducing decoding complexity while maintaining verification reliability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts the change indication information from the paging message structure, placing it in a separate short message (paging PDCCH) that can be decoded independently. This allows the UE to obtain change indication information without decoding the entire long paging message (paging PDSCH), thereby reducing power consumption while maintaining reliability of system broadcast information acquisition.

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If the paging message includes change indication information of system broadcast, then the UE can detect system broadcast changes, but the paging message length increases

Engineering Contradiction:

Improvesystem broadcast change detectionVSAvoidpaging message length

Core Design Contradiction:

ReliabilityVSLength of moving object

Solution Approach 1:

The patent extracts the change indication information from the paging message structure, placing it in a separate short message (paging PDCCH) that can be decoded independently. This allows the UE to obtain change indication information without decoding the entire long paging message (paging PDSCH), thereby reducing power consumption while maintaining reliability of system broadcast information acquisition.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS11064456B2Wireless communication method, device, chip and system

Publication Date: 2021.07.13 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

Provided are a wireless communication method, a device, a chip and a system. The method is applied to a terminal device in a connected state; the method includes: the terminal device receives first indication information sent by a network device, the first indication information being used to indicate whether change indication information of a system broadcast exists in a paging message; and the terminal device determines whether to receive the paging message sent by the network device according to the first indication information. The first indication information is sent by the network device, in the case where the change indication information of the system broadcast is not included in the current paging message, preventing the terminal device from acquiring and decoding the paging message to verify if there is the change indication information of the system broadcast, thereby reducing the complexity and the power consumption of the UE.