SIP Message Priority QoS Mechanism for Wireless UE

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Solution Overview

Problem

Wireless Priority Service (WPS) devices face challenges in maintaining high-priority Quality-of-Service (QoS) during network overloads due to potential attacks from malicious devices that can illegitimately obtain WPS QoS, compromising the quality for legitimate devices.

Innovation Solution

Implementing a high-priority Quality-of-Service (QoS) mechanism within wireless communication networks that uses specific Establishment Causes and prefixes, such as *272, to ensure priority access and message delivery for critical communications, distinguishing between legitimate and malicious messages through Session Initiation Protocol (SIP) messages and Internet Protocol Short Messaging (IPSM).

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If WPS QoS is provided to all devices requesting it, then priority message delivery is improved, but network security deteriorates due to malicious device attacks

Engineering Contradiction:

Improvemessage delivery reliabilityVSAvoidmalicious device attacks

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an intermediary verification mechanism where the network validates whether a device is legitimately authorized for WPS QoS before granting priority treatment. This intermediary step (authentication/authorization check) prevents malicious devices from obtaining WPS QoS while ensuring legitimate devices receive priority message delivery, thus resolving the contradiction between reliability and security

Inventive Principle:

Principle #24Intermediary (Mediator)

2Speed

If priority QoS is granted during network overloads, then message delivery speed is improved, but network resource fairness deteriorates

Engineering Contradiction:

Improvemessage delivery speedVSAvoidnetwork resource fairness

Core Design Contradiction:

SpeedVSEase of operation

Solution Approach 1:

The patent applies local quality by providing differentiated QoS treatment based on message priority and device authorization. High-priority messages from authorized WPS devices receive expedited handling with guaranteed delivery, while standard-priority messages from non-WPS devices receive normal best-effort service. This localized quality differentiation ensures fast delivery for critical messages while maintaining overall network resource fairness

Inventive Principle:

Principle #3Local quality

3Loss of time

If WPS access class is used for priority access, then access delay is reduced, but vulnerability to attacks increases

Engineering Contradiction:

Improveaccess delayVSAvoidillegitimate WPS QoS acquisition

Core Design Contradiction:

Loss of timeVSObject-affected harmful factors

Solution Approach 1:

The patent implements preliminary action by performing authentication and authorization checks before a device can access WPS QoS resources. The network verifies device credentials and WPS entitlements in advance, establishing a trusted relationship before allowing priority access. This preliminary verification prevents malicious devices from acquiring WPS QoS while ensuring legitimate devices experience minimal access delay

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11736432B2Wireless messaging with high-priority quality-of-service

Publication Date: 2023.08.22 T MOBILE INNOVATIONS LLC

AI summary

A wireless User Equipment (UE) generate a Session Initiation Protocol (SIP) message that comprises a SIP header and a user message. The SIP header indicates a priority QoS and the user message indicates a message destination. The wireless UE wirelessly transfers the SIP message to a wireless network and the wireless network transfers the SIP message to a message network. In response to the priority QoS indicated in the SIP header, the message network generates and transfers another SIP message using the priority QoS. The other SIP message comprises another SIP header and the user message.