Wireless Terminal Group Paging to Reduce Unnecessary Monitoring

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Solution Overview

Problem

In 5G mobile communication systems, user equipment (UE) in RRC idle or inactive mode wastes power due to unnecessary monitoring of physical downlink control channels (PDCCH) and physical downlink shared channels (PDSCH) when there are no paging messages, especially with low paging probability.

Innovation Solution

UEs are categorized into groups based on identification, paging probability, or higher layer signaling, and receive paging indication information to determine whether to monitor or not monitor paging occasions, using downlink control information with specific fields to indicate paging operations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UE monitors PDCCH in every paging cycle, then paging reliability is improved, but power consumption increases

Engineering Contradiction:

Improvepaging reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent divides UEs into multiple groups (first UE group and second UE group) based on paging probability. Different groups are assigned different monitoring strategies: high-probability UEs monitor PDCCH while low-probability UEs skip monitoring. This segmentation resolves the contradiction by allowing reliability to be maintained for critical UEs while reducing power consumption for less critical UEs.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different paging monitoring qualities to different UE groups. First UE group (higher paging probability) receives full monitoring service while second UE group (lower paging probability) receives reduced monitoring service. This local differentiation optimizes the balance between reliability and power consumption for each local group.

Inventive Principle:

Principle #3Local quality

2Reliability

If UE monitors PDSCH scheduled by PDCCH, then paging message reception is improved, but power consumption increases when paging message is for another UE

Engineering Contradiction:

Improvepaging message receptionVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network performs preliminary action by sending downlink control information (DCI) before the actual paging message transmission. This DCI indicates whether a paging message will be transmitted and for which UE group. UEs use this advance information to decide whether to wake up and receive the PDSCH, avoiding unnecessary power consumption when the scheduled message is for another UE or none at all.

Inventive Principle:

Principle #10Preliminary action

3Use of energy by moving object

If UE uses DRX cycle for paging monitoring, then power saving is improved, but paging message may be missed when no PDCCH monitoring occasion aligns

Engineering Contradiction:

Improvepower savingVSAvoidpaging message reception

Core Design Contradiction:

Use of energy by moving objectVSReliability

Solution Approach 1:

The patent introduces dynamic paging indication information that adapts to different UE groups and paging conditions. Instead of a static DRX cycle, the system dynamically adjusts monitoring behavior based on group-specific paging probability and network conditions, allowing UEs to optimize between power saving and reliability for their specific scenarios.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS12395965B2Method for paging wireless terminal groups

Publication Date: 2025.08.19 ZTE CORP

AI summary

A wireless communication method includes receiving, from a wireless network node, a paging indication information associated with a paging operation of at least one of a plurality of wireless terminal groups. The paging operation is performed based on the paging indication information.