IMS SIP Indication for Data Channel Resource Allocation

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Solution Overview

Problem

Existing communication networks lack the ability to provide UEs with information about available data channel content, leading to unnecessary signaling overhead and resource allocation before determining actual content availability, especially in IMS sessions.

Innovation Solution

An IMS network node provides an indication in a SIP message to UEs regarding available data channel content, allowing UEs to establish data channels only when content is available, thereby optimizing resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If UEs establish data channels without prior indication of content availability, then data channel setup is simplified, but unnecessary signaling overhead and resource allocation occur

Engineering Contradiction:

Improvedata channel setup simplicityVSAvoidsignaling overhead and resource allocation

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The network node performs preliminary action by providing an indication of data channel content availability before the UE establishes data channels. This allows the UE to make informed decisions about whether to set up data channels, avoiding unnecessary signaling overhead and resource allocation when content is not available, while still maintaining simple channel setup procedures when content is present.

Inventive Principle:

Principle #10Preliminary action

2Device complexity

If network nodes do not provide indication of DC content availability, then network complexity is reduced, but UE cannot optimize resource allocation

Engineering Contradiction:

Improvenetwork node functionalityVSAvoidresource allocation efficiency

Core Design Contradiction:

Device complexityVSProductivity

Solution Approach 1:

The network node provides feedback information to the UE in the form of an indication about data channel content availability. This feedback mechanism enables the UE to optimize its resource allocation decisions without requiring complex network node functionality, achieving efficient resource utilization while maintaining relatively simple network architecture.

Inventive Principle:

Principle #23Feedback

3Adaptability or versatility

If data channels are established without content availability information, then UE can proactively setup channels, but network resources are allocated unnecessarily

Engineering Contradiction:

ImproveUE proactive channel setupVSAvoidnetwork resource allocation

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The network node provides preliminary indication of content availability before the UE establishes data channels. This allows the UE to maintain proactive channel setup capability while avoiding unnecessary resource allocation by using the indication information to determine whether to establish channels, thus optimizing the balance between adaptability and resource efficiency.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP4520030B1Methods, user equipment and internet protocol multimedia subsystem network node for handling communication in a communication network

Publication Date: 2026.03.25 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

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AI summary

Embodiments herein may relate to a method performed by an IMS network node (12) for handling an IMS session of one or more UEs in a communication network 1. The IMS network node provides to a UE (100) an indication in a SIP message, indicating available data channel content or not for an IMS session.