Paging PDCCH Repeat Transmission Across SSB Beams

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Solution Overview

Problem

The challenge of implementing repeat transmission for the paging Physical Downlink Control Channel (PDCCH) in low-capability NR terminals has not been addressed in existing technologies, which is crucial for improving coverage performance in 5G networks.

Innovation Solution

A method is provided for determining PDCCH monitoring occasions based on the product of the number of SSB beams and the maximum number of retransmissions, allowing both terminal and network devices to implement repeat transmissions of the paging PDCCH, enhancing reception performance through multiple transmissions and combining them at the receiving end.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If repeat transmission of paging PDCCH is implemented for low-capability terminals, then reception performance and coverage are improved, but device complexity and processing overhead increase

Engineering Contradiction:

Improvereception performanceVSAvoidterminal complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent segments the PDCCH monitoring process by defining specific monitoring occasions tied to SSB beams. Low-capability terminals only need to monitor PDCCH on specific SSB beams rather than all beams, dividing the monitoring task into manageable segments that match terminal capabilities while maintaining reliable paging reception through targeted monitoring.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by configuring different PDCCH monitoring parameters for different terminal capabilities. Low-capability terminals receive simplified configurations with fewer monitoring occasions and reduced processing requirements, while full-capability terminals can utilize complete monitoring schemes, optimizing performance for each device type without compromising overall system reliability.

Inventive Principle:

Principle #3Local quality

2Reliability

If maximum number of PDCCH monitoring occasions is increased to support repeat transmissions, then coverage performance is improved, but terminal power consumption and processing load increase

Engineering Contradiction:

Improvecoverage performanceVSAvoidterminal power consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements periodic action by scheduling PDCCH monitoring occasions at specific intervals tied to SSB transmission periods. Terminals monitor paging PDCCH only at these predetermined monitoring occasions rather than continuously, enabling repeat transmissions to occur periodically while significantly reducing terminal power consumption compared to continuous monitoring schemes.

Inventive Principle:

Principle #19Periodic action

Solution Approach 2:

The patent applies preliminary action by pre-configuring terminals with knowledge of upcoming PDCCH monitoring occasions and SSB beam configurations. Terminals can prepare for monitoring in advance and enter low-power states between monitoring occasions, reducing overall power consumption while ensuring timely reception of repeated paging transmissions.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12520277B2Repeat transmission paging method, electronic device, and storage medium

Publication Date: 2026.01.06 GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD

AI summary

A repeat transmission paging method comprises: a terminal device determines a physical downlink control channel (PDCCH) monitoring occasion on at least one synchronization signal block (SSB) beam. The maximum number of the PDCCH monitoring occasion is a product of the number of SSB beams on which a network device transmits a paging PDCCH and the maximum number of retransmissions of the paging PDCCH on each SSB beam.