Network Slice Registration Back-Off for Resource Limit Control

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Solution Overview

Problem

Existing wireless communication systems face challenges in efficiently managing network slices due to resource allocation limits, leading to rejected or pending registration requests, which can overload networks and hinder efficient service provision.

Innovation Solution

A method and apparatus for user equipment (UE) and network entities to handle registration requests by including network slice assistance information (NSSAI), determining resource allocation limits, and implementing back-off timers or fallback strategies to manage network slice registration efficiently.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If network slice registration requests are continuously transmitted when resource allocation reaches upper limit, then service availability is improved, but network overload increases

Engineering Contradiction:

Improveservice availabilityVSAvoidnetwork overload

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by implementing back-off timers that prevent UE from transmitting registration requests during periods when network resources are exhausted. The timer creates a preemptive pause in registration attempts, counteracting potential network overload before it occurs, while still allowing service restoration when resources become available.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent implements dynamics by making the registration request transmission behavior adaptive based on network conditions. The back-off timer duration and registration suspension decisions are dynamically adjusted according to resource allocation status, allowing the system to flexibly respond to changing network capacity rather than following a fixed transmission pattern.

Inventive Principle:

Principle #15Dynamics

2Stability of the object's composition

If back-off timer is implemented to prevent network overload, then network stability is improved, but registration delay increases

Engineering Contradiction:

Improvenetwork stabilityVSAvoidregistration delay

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The patent applies feedback by continuously monitoring network resource allocation status and using this information to adjust registration request transmission timing. The network entity provides feedback through rejection causes and resource status information, enabling UE to adapt its registration strategy and minimize delays when resources become available while maintaining stability during constrained periods.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent implements preliminary action by having UE prepare registration requests with appropriate back-off timer values in advance, based on current network conditions. This allows the system to proactively manage registration timing rather than reactively handling rejections, reducing overall registration delay while maintaining network stability.

Inventive Principle:

Principle #10Preliminary action

3Productivity

If network slice resource allocation is strictly controlled, then resource efficiency is improved, but service flexibility deteriorates

Engineering Contradiction:

Improveresource efficiencyVSAvoidservice flexibility

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamics by making resource allocation and registration acceptance behavior adaptive rather than static. Network entities can dynamically adjust which network slices accept registration requests based on current resource availability, allowing strict control during constrained periods while maintaining flexibility when resources are abundant. This enables the system to switch between efficiency-oriented and flexibility-oriented modes as conditions change.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by modifying registration request handling parameters (such as back-off timer values, rejection causes, and slice-specific acceptance criteria) based on resource allocation status. These parameter adjustments allow the system to maintain efficient resource utilization while preserving service flexibility through configurable policy parameters that can be changed without altering the fundamental system architecture.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS12550094B2Method and apparatus for controlling network slice in wireless communication system

Publication Date: 2026.02.10 SAMSUNG ELECTRONICS CO LTD

AI summary

A method, performed by a user equipment (UE), in a wireless communication system, includes: transmitting, to a network entity, a registration request message including network slice assistance information (NSSAI) corresponding to a slice; receiving a response message including rejection information on a registration for the slice in case that resource allocation has reached an upper limit; and determining to suspend a registration request for the slice, based on the response message, wherein the rejection information on the registration for the slice includes information on a back-off timer or information on a rejection cause.