Radio Network Node Paging Policy Differentiation via PPI

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Solution Overview

Problem

Current wireless communication networks lack the ability to apply different paging policies for various services within the same Quality of Service (QoS) flow, leading to inefficient energy usage and performance, as they only allow distinct policies for different QoS flows.

Innovation Solution

Implementing Paging Policy Differentiation (PPD) by including a Paging Policy Indicator (PPI) in the Downlink (DL) Protocol Data Unit (PDU) within the same QoS flow, allowing the radio network node to extract and apply specific paging policies for each service, thereby enabling differentiated paging strategies for different services mapped on the same QoS flow.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single paging policy is applied to all services within the same QoS flow, then device complexity is reduced and ease of operation is improved, but adaptability deteriorates as different services cannot have differentiated paging policies

Engineering Contradiction:

Improvepaging policy differentiationVSAvoidnetwork node complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent segments the paging policy identification by introducing a Service Level Indicator (SLI) that distinguishes different services within the same QoS flow. The network node extracts the SLI from the downlink data packet and uses it to identify and apply the appropriate paging policy, enabling differentiated paging for different services while maintaining a unified QoS flow structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by allowing different paging policies to be associated with different services (local characteristics) within the same QoS flow. The SLI enables the network node to apply specific paging policies locally to each service based on its requirements, rather than applying a uniform policy globally to all services in the flow.

Inventive Principle:

Principle #3Local quality

2Adaptability or versatility

If paging policies are differentiated for each service within the same QoS flow, then adaptability is improved, but information processing complexity increases as the network node must extract and process additional service identification data

Engineering Contradiction:

Improvepaging policy differentiationVSAvoidservice identification complexity

Core Design Contradiction:

Adaptability or versatilityVSDifficulty of detecting and measuring

Solution Approach 1:

The patent extracts the Service Level Indicator (SLI) from the downlink data packet header or associated metadata. This extracted SLI is then used by the network node to identify the appropriate paging policy for the specific service, enabling differentiation without requiring complex analysis of the entire data packet or service characteristics.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The SLI acts as an intermediary element that bridges the downlink data packet and the paging policy selection mechanism. Instead of directly analyzing service characteristics or packet contents to determine paging policy, the network node uses the SLI as a mediator that directly maps to predefined paging policies, simplifying the detection and decision-making process.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If multiple paging policies are maintained for different services, then adaptability is improved, but loss of information increases due to the need to manage and track multiple policy parameters

Engineering Contradiction:

Improvepaging policy differentiationVSAvoidpolicy management overhead

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent implements a unified paging policy identification mechanism that handles multiple services and policies through a single SLI-based approach. The same extraction and matching process works for all services within the QoS flow, providing a universal solution that manages multiple paging policies without requiring separate tracking mechanisms for each service, thereby reducing information management overhead.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS11743861B2Radio network node, user plane function (UPF) and methods performed therein for paging policy differentiation

Publication Date: 2023.08.29 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A radio network node in a radio access network (RAN) and a method therein for Paging Policy Differentiation (PPD). The radio network node receives from a core network a Downlink (DL) Protocol Data Unit (PDU) associated with a wireless device. The DL PDU is comprised in a Quality of Service (QoS)-flow, is originated from a respective service, and comprises a Paging Policy Indicator (PPI) associated with the respective service. The radio network node extracts the PPI by means of a Central Unit User Plane (CU-UP). By means of the CU-UP, the radio network node informs a Central Unit Control Plane (CU-CP) about the PPI. Further, by means of the CU-CP, the radio network node triggers paging of the wireless device. Furthermore, the radio network node pages the wireless device according to the PPI associated with the respective service.