Logical Channel Cell Restriction After Packet Duplication Deactivation

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Solution Overview

Problem

Current wireless communication systems face limitations in managing cell restrictions for logical channels after packet duplication is deactivated, leading to inefficiencies in resource allocation and flexibility.

Innovation Solution

The proposed solution involves associating logical channels with a radio bearer configured for packet duplication, determining cell restrictions, and restricting the remaining logical channel to an allowed set of cells based on pre-defined cell restrictions, allowing it to use any cell within that set without introducing new signaling or information elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If packet duplication is deactivated for a radio bearer, then resource allocation flexibility is improved, but cell restriction management for logical channels deteriorates

Engineering Contradiction:

Improveresource allocation flexibilityVSAvoidcell restriction management

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by pre-configuring cell restriction information for logical channels before packet duplication is deactivated. When duplication is deactivated, the previously determined cell restrictions are automatically applied to the remaining logical channel, ensuring continuous valid restriction management without requiring new signaling.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If new signaling or information elements are introduced to maintain cell restrictions after duplication deactivation, then cell restriction management is improved, but signaling overhead increases

Engineering Contradiction:

Improvecell restriction managementVSAvoidsignaling overhead

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies universality by making the existing cell restriction determination mechanism serve multiple functions: it manages cell restrictions both during packet duplication activation and after deactivation. The same determination logic and information elements are reused in both states, eliminating the need for separate signaling mechanisms.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system applies self-service by automatically maintaining valid cell restrictions for logical channels after duplication deactivation using the already-determined cell restriction information. The network device automatically applies the restrictions without requiring additional network signaling or manual configuration.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3857951B1Logical channel cell restriction

Publication Date: 2023.11.22 NOKIA TECHNOLOGIES OY

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AI summary

There is provided a method comprising: associating plurality of logical channels with a radio bearer that is configured for packet duplication; determining cell restrictions for the plurality of logical channels, the cell restrictions indicating allowable one or more cell for each of the plurality of logical channels during packet duplication for the radio bearer; detecting that the packet duplication for the radio bearer is deactivated; in response to the detecting, restricting a remaining logical channel of the plurality of logical channels to an allowed set of cells based on the determined cell restrictions for the plurality of logical channels.