Random Access Preamble Segmentation for Multi-Modal Communication

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Solution Overview

Problem

Existing communication technologies struggle to efficiently distinguish and manage random access requests from single-modal and multi-modal communications, leading to increased failure rates and delays due to the complexity and resource inefficiencies in handling diverse input modalities.

Innovation Solution

Implementing distinct random access preambles for single-modal and multi-modal communications, along with corresponding identity and location information, to facilitate differentiated network responses and reduce resource waste and delays.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If distinct random access preambles are implemented for single-modal and multi-modal communications, then the ability to distinguish and manage different communication types is improved, but the device complexity and resource requirements increase

Engineering Contradiction:

Improvedistinguishing capabilityVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The random access preamble group is segmented into multiple subgroups, where each subgroup is assigned to specific communication modalities. This allows the system to distinguish between single-modal and multi-modal communications by identifying which subgroup the preamble belongs to, thereby improving distinguishing capability while maintaining manageable complexity through structured organization.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different preambles within the segmented groups are assigned different local qualities or characteristics that correspond to specific communication types. This enables the network to identify the communication modality based on the specific preamble properties without requiring complex analysis of the entire random access procedure.

Inventive Principle:

Principle #3Local quality

2Productivity

If separate random access preambles are used for different communication modalities, then resource allocation efficiency is improved, but the overhead and signaling requirements increase

Engineering Contradiction:

Improveresource allocation efficiencyVSAvoidpreamble overhead

Core Design Contradiction:

ProductivityVSQuantity of substance

Solution Approach 1:

The random access preamble structure is designed with multi-functionality, where a single preamble simultaneously serves multiple purposes: indicating the communication modality, initiating random access, and providing synchronization information. This universal design improves resource allocation efficiency without proportionally increasing overhead, as the same signal element performs multiple functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12543222B2Method for random access communication device, and storage medium

Publication Date: 2026.02.03 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A method for random access includes: selecting, by a user equipment, a random access preamble from a group of random access preambles corresponding to a multi-modal communication and performing, by the user equipment, a random access of the multi-modal communication. Another method for random access includes: receiving, by an access network device, a random access request; and determining, by the access network device, whether a random access is initiated based on a multi-modal communication, according to a random access preamble carried in the random access request.