Paging Procedure Network Slice Selection Wireless Communication

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Solution Overview

Problem

Current paging procedures in wireless communication systems face challenges with network slicing, including increased paging overhead, response delays, and mobility issues due to the lack of information about the network slice supported by the serving cell, especially when the UE is in RRC_IDLE or RRC_INACTIVE states.

Innovation Solution

A method where a wireless device receives a paging message and transmits a paging response message including Single-Network Slice Selection Assistance Information (S-NSSAI) for the MT service, allowing the network to determine if the UE needs to move to another cell supporting the assigned network slice, thereby reducing overhead and mobility delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If paging message includes S-NSSAI information, then network can identify supported network slice, but paging overhead increases

Engineering Contradiction:
Improvenetwork slice identification informationVSAvoidpaging overhead
Core Design Contradiction:
Loss of informationVSQuantity of substance

Solution Approach 1:

The network performs preliminary action by including S-NSSAI information in the paging message before the UE needs to make mobility decisions. This allows the UE to advance knowledge of which network slices are supported in the serving cell, enabling informed paging response without requiring subsequent context retrieval or delay.

Inventive Principle:
Principle #10Preliminary action

2Extent of automation

If UE includes S-NSSAI in paging response, then network can control mobility without UE context retrieval, but response time increases

Engineering Contradiction:
Improvenetwork controlled mobilityVSAvoidpaging response delay
Core Design Contradiction:
Extent of automationVSLoss of time

Solution Approach 1:

The UE provides feedback by including S-NSSAI information in the paging response message, enabling the network to automatically determine whether the UE needs to move to a different cell. This feedback mechanism eliminates the need for manual UE context retrieval while allowing rapid mobility decisions.

Inventive Principle:
Principle #23Feedback

3Reliability

If UE performs slice-aware cell reselection, then UE can access supported network slice, but mobility delays increase

Engineering Contradiction:
Improvenetwork slice accessVSAvoidmobility delay
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The network performs preliminary action by including S-NSSAI information in the paging message before the UE needs to make mobility decisions. This allows the UE to advance knowledge of which network slices are supported in the serving cell, enabling informed paging response without requiring subsequent context retrieval or delay.

Inventive Principle:
Principle #10Preliminary action

Data Source

PatentUS12170979B2Method and apparatus for paging procedure considering network slicing in a wireless communication system
Publication Date: 2024.12.17 LG ELECTRONICS INC
  • US12170979B2 patent drawing
  • US12170979B2 patent drawing
  • US12170979B2 patent drawing

AI summary

A method and apparatus for paging procedure considering network slicing in a wireless communication system is provided. A wireless device receives, from a network, a paging message including information related to a mobile terminated (MT) service. A wireless device transmits, to the network, a paging response message including information on Single-Network Slice Selection Assistance Information (S-NSSAI) for the MT service. A wireless device receives, from the network, the MT service from a cell related to the S-NSSAI. The cell is determined based on the paging response message.