Random Access Response Scheduling for NR System Information Requests

Solution Overview

Problem

In wireless communication systems, particularly in New Radio (NR) systems, the process of requesting other system information is inefficient due to the need for terminals to monitor and decode random access responses, leading to high implementation complexity, especially in low-cost and low-complexity devices like NR-lite terminals.

Innovation Solution

A method and apparatus for requesting other system information that involves sending a random access preamble, acquiring scheduling information for a random access response, and receiving the response based on predefined or broadcasted time-frequency resources, thereby reducing the need for monitoring and decoding of the random access response.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If terminals monitor and decode random access responses to request other system information, then system information can be obtained, but implementation complexity increases

Engineering Contradiction:

Improvesystem information acquisitionVSAvoidterminal implementation complexity

Core Design Contradiction:

Loss of informationVSDevice complexity

Solution Approach 1:

The network device pre-configures and broadcasts time-frequency resource information for random access responses before terminals need to request other system information. This preliminary provision of resource allocation information allows terminals to directly receive responses without complex monitoring and decoding procedures, thereby reducing terminal implementation complexity while ensuring system information can be obtained.

Inventive Principle:

Principle #10Preliminary action

2Loss of information

If terminals monitor and decode random access responses, then system information can be requested, but power consumption increases

Engineering Contradiction:

Improvesystem information acquisitionVSAvoidterminal power consumption

Core Design Contradiction:

Loss of informationVSUse of energy by moving object

Solution Approach 1:

The network device pre-configures and broadcasts time-frequency resource information for random access responses before terminals need to request other system information. This preliminary provision of resource allocation information allows terminals to directly receive responses without complex monitoring and decoding procedures, thereby reducing terminal implementation complexity while ensuring system information can be obtained.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12526845B2Method and apparatus for requesting other system information, and device medium

Publication Date: 2026.01.13 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for requesting other system information includes: sending by a terminal, a random access preamble to a network device, with the random access preamble being used for requesting other system information; acquiring scheduling information for a random access response; and receiving the random access response according to the scheduling information of the random access response, with the random access response carrying response information associated with the other system information.