SDAP Entity Configuration via PDCP Signaling in 5G

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Solution Overview

Problem

The existing configuration of Service Data Adaptation Protocol (SDAP) entities in 5G systems incurs significant overhead due to the need for explicit configuration signaling, which increases the burden on network resources.

Innovation Solution

A method is introduced to configure SDAP entities implicitly by using configuration information that includes a data radio bearer (DRB) identifier and an SDAP entity identifier, allowing the terminal device to establish or modify the corresponding relationships without explicit signaling for SDAP entity configuration, thereby reducing overhead.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If explicit configuration signaling is used to configure SDAP entities, then configuration reliability is improved, but signaling overhead increases

Engineering Contradiction:

Improveconfiguration reliabilityVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent uses PDCP configuration signaling as a template/copy to also configure SDAP entities. Instead of creating separate SDAP configuration signaling, the system reuses the existing PDCP configuration structure to implicitly configure SDAP entities, thereby reducing signaling overhead while maintaining configuration reliability.

Inventive Principle:

Principle #26Copying

Solution Approach 2:

The patent merges SDAP entity configuration with PDCP configuration into a single signaling process. By combining these two configuration functions into one unified signaling message, the system eliminates redundant signaling and reduces overall overhead while ensuring both PDCP and SDAP entities are properly configured.

Inventive Principle:

Principle #5Merging (Combining)

2Manufacturing precision

If separate configuration signaling is sent for SDAP entities, then configuration precision is improved, but network resource consumption increases

Engineering Contradiction:

Improveconfiguration precisionVSAvoidnetwork resource consumption

Core Design Contradiction:

Manufacturing precisionVSLoss of energy

Solution Approach 1:

The patent makes the PDCP configuration signaling multi-functional by enabling it to configure both PDCP entities and SDAP entities simultaneously. This universal approach allows a single signaling message to perform multiple configuration tasks, reducing network resource consumption while maintaining precise configuration control.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent performs SDAP entity configuration preliminarily through the PDCP configuration signaling that is already being sent. By embedding SDAP configuration instructions within the existing PDCP configuration process, the system avoids additional network resource consumption while ensuring precise configuration of SDAP entities before data transmission begins.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS11968728B2Method of configuring service data adaptation protocol entity and device

Publication Date: 2024.04.23 VIVO MOBILE COMM CO LTD

AI summary

A method of configuring a Service Data Adaptation Protocol (SDAP) entity and a terminal device are provided, and the method includes: receiving configuration information, where the configuration information includes an identifier of a DRB to be configured, and a PDU session identifier corresponding to the DRB to be configured; configuring, according to the configuration information, the DRB to be configured and a target SDAP entity corresponding to the PDU session identifier.