Shared Random Access Response for Wireless System Information

Solution Overview

Problem

Current wireless communication systems face inefficiencies in random access procedures for system information requests, particularly in scenarios where multiple UEs need to access system information that is not periodically broadcast, leading to resource wastage and increased latency due to separate random access responses for each UE.

Innovation Solution

Implementing a method where UEs transmit a random access preamble and immediately monitor a control channel for a random access response, using a shared identity (RA-RNTI) for multiple UEs requesting the same system information, and providing an SI indication to stop unnecessary preamble transmissions once the request is acknowledged, allowing for coordinated system information provision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If separate random access responses are provided for each UE requesting system information, then each UE can receive its response reliably, but resource wastage increases and latency increases

Engineering Contradiction:

Improverandom access response deliveryVSAvoidnetwork resource wastage

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent merges multiple separate random access responses into a single shared random access response that can be received by multiple UEs simultaneously. The network node transmits one random access response message that contains system information applicable to multiple UEs that transmitted preamble sequences, thereby consolidating what would otherwise be multiple separate transmissions into a single efficient operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The random access response is designed to serve multiple UEs universally rather than being dedicated to a single UE. The response message contains information that can be utilized by any UE that transmitted a preamble during the same random access occasion, making the response multi-functional and applicable to multiple recipients simultaneously.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If separate random access responses are provided for each UE requesting system information, then each UE can receive its response reliably, but latency increases

Engineering Contradiction:

Improverandom access response deliveryVSAvoidsystem information acquisition latency

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent merges multiple separate random access responses into a single shared random access response that can be received by multiple UEs simultaneously. The network node transmits one random access response message that contains system information applicable to multiple UEs that transmitted preamble sequences, thereby consolidating what would otherwise be multiple separate transmissions into a single efficient operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent enables UEs to skip waiting for individual dedicated responses by allowing them to acquire system information from a shared random access response transmitted by the network. This rushing through the traditional multi-step individual response process reduces the overall time required for system information acquisition.

Inventive Principle:

Principle #21Skipping (Rushing through)

3Ease of operation

If UEs transmit random access preambles separately for system information requests, then each UE can initiate its request, but resource wastage increases

Engineering Contradiction:

ImproveUE request initiationVSAvoidrandom access resource wastage

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent merges multiple separate random access responses into a single shared random access response that can be received by multiple UEs simultaneously. The network node transmits one random access response message that contains system information applicable to multiple UEs that transmitted preamble sequences, thereby consolidating what would otherwise be multiple separate transmissions into a single efficient operation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system enables UEs to self-serve by allowing them to monitor for and acquire system information from shared random access responses transmitted by the network, reducing the need for dedicated individual responses and thereby reducing overall resource consumption while maintaining ease of request initiation.

Inventive Principle:

Principle #25Self-service

Data Source

PatentEP3474624B1Method and apparatus for random access procedure for system information request in a wireless communication system

Publication Date: 2020.08.26 ASUSTEK COMPUTER INC

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AI summary

Methods and apparatuses for random access procedures for a system information request in a wireless communication system are disclosed herein. In one method, a user equipment (UE) initiates a random access procedure to request a system information (2205). The UE transmits a random access preamble during the random access procedure (2210). The UE monitors a control channel for a random access response immediately after transmitting the random access preamble for a request of the system information (2215).