Radio Node Initial Access Period Optimization

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Solution Overview

Problem

Insufficient studies have been conducted on the initial connection procedure for the backhaul link of radio nodes like IAB nodes, necessitating an optimized connection method.

Innovation Solution

A radio node with a reception section for receiving information used in initial access to another radio node and a control section that manages this access, controlling the reception based on periods equal to or longer than those defined for user terminals in secondary cells.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the initial connection procedure for backhaul link uses the same transmission period as user terminals, then the connection establishment is simpler, but the signal overhead increases and frequency use efficiency decreases

Engineering Contradiction:

Improveinitial connection procedureVSAvoidsignal overhead

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent changes the transmission period parameter for backhaul link initial access to be longer than or equal to the period defined for user terminals. This parameter modification reduces the frequency of transmissions, thereby reducing signal overhead and improving frequency use efficiency while still enabling proper initial connection establishment

Inventive Principle:

Principle #35Parameter changes

2Productivity

If the transmission period for backhaul link initial access is extended, then the frequency use efficiency improves, but the connection establishment time increases

Engineering Contradiction:

Improvefrequency use efficiencyVSAvoidconnection establishment time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having the radio node prepare and store information for initial access in advance. The reception section receives and stores necessary access information before it is needed, allowing the control section to quickly initiate access procedures when required, thus reducing the actual connection establishment time despite the extended transmission period

Inventive Principle:

Principle #10Preliminary action

3Reliability

If the radio node receives information more frequently, then the initial access reliability improves, but the resource consumption increases

Engineering Contradiction:

Improveinitial access reliabilityVSAvoidresource consumption

Core Design Contradiction:

ReliabilityVSQuantity of substance

Solution Approach 1:

The patent applies partial action by having the radio node receive and process only the essential information needed for initial access at the optimized, longer transmission period. Rather than continuously receiving all possible access information, the system receives the minimum necessary information at appropriate intervals, reducing resource consumption while maintaining sufficient access reliability

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS11902987B2Radio node and radio communication method

Publication Date: 2024.02.13 NTT DOCOMO INC

AI summary

A radio node includes: a reception section that receives information used for initial access to another radio node in a first cell; and a control section that controls the initial access based on the information. The control section controls reception of the information based on a period equal to or longer than a period defined for a user terminal in a second cell with respect to transmission of the information.