Lead UE Random Access Configuration for Massive Initial Access

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Solution Overview

Problem

In remote areas, a large group of user equipment attempting simultaneous network access in non-terrestrial networks experiences significant random access collisions and increased energy consumption due to contention, which conventional terrestrial-based communications are insufficient to address.

Innovation Solution

A lead user equipment provides device-specific quality of service profiles and cell measurement reports to a serving cell, relaying random access configurations to group members to avoid collisions and optimize energy consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a large group of user equipment attempts simultaneous network access using conventional random access procedures, then network coverage and service availability are improved, but random access collisions and energy consumption increase significantly

Engineering Contradiction:

Improvenetwork access reliabilityVSAvoiduser equipment energy consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The network provides random access configurations to user equipment in advance, before the actual random access attempt. This preliminary configuration includes device-specific parameters that are prepared beforehand, allowing UEs to execute the access procedure more efficiently without repeated collisions and retransmissions, thereby reducing energy consumption while maintaining access reliability

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements device-specific random access configurations tailored to individual user equipment characteristics and conditions. Each UE receives customized parameters such as preamble assignments, power control settings, and timing adjustments specific to its location, device type, and channel conditions, optimizing access performance for each device while reducing overall network collisions

Inventive Principle:

Principle #3Local quality

2Reliability

If a large group of user equipment attempts simultaneous network access, then network coverage capability is improved, but random access collisions increase

Engineering Contradiction:

Improvenetwork access success rateVSAvoidrandom access collisions

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The network dynamically adjusts random access parameters including preamble sequences, power levels, and timing offsets based on current network conditions and device-specific characteristics. By changing these parameters adaptively for different UEs and network states, the system reduces collision probability while maintaining coverage for large user groups

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Device-specific random access configurations are provided to different user equipment based on their individual needs and network conditions. Each UE receives customized parameters tailored to its specific situation, such as location, device type, and channel quality, which minimizes collisions while maintaining successful access rates across the entire user group

Inventive Principle:

Principle #3Local quality

3Object-generated harmful factors

If device-specific random access configurations are provided to all user equipment, then random access collision probability is reduced, but network signaling overhead increases

Engineering Contradiction:

Improverandom access collisionsVSAvoidnetwork signaling overhead

Core Design Contradiction:

Object-generated harmful factorsVSQuantity of substance

Solution Approach 1:

The patent provides device-specific random access configurations through a unified RRC signaling mechanism that handles multiple functions simultaneously. The same RRC setup or reconfiguration messages that establish basic device parameters also convey the specialized random access configurations, thereby providing customized parameters without requiring separate dedicated signaling procedures for each device

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The random access configuration information is merged with other existing RRC signaling procedures rather than being transmitted separately. The configurations are incorporated into standard RRC setup, reconfiguration, or release messages that are already being exchanged between the network and user equipment, thus delivering device-specific parameters without increasing overall signaling overhead

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS20250380295A1Method and system for massive initial access management

Publication Date: 2025.12.11 CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH

AI summary

Improving random access and energy consumption of a large user equipment group in a cellular network by a lead user equipment relaying network measurements to a target network cell, receiving equipment specific random access configurations from the target network cell, and relaying the equipment specific random access configurations to the user equipment group for performing random access contention to the target network cell.