Random Access Response Framing to Avoid Wireless Collisions

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Solution Overview

Problem

Random access procedures in wireless communications can lead to interference and undesirable outcomes such as unsuccessful or delayed communications due to collisions between multiple devices initiating access procedures.

Innovation Solution

Incorporating system frame numbers in downlink control signals to differentiate between random access procedures, allowing wireless devices to distinguish messages and avoid collisions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If multiple wireless devices transmit random access preambles simultaneously to establish communication, then communication establishment speed is improved, but interference and collisions between procedures increase

Engineering Contradiction:

Improvecommunication establishment speedVSAvoidinterference between random access procedures

Core Design Contradiction:

SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent segments the random access procedure by introducing system frame number indications in downlink control signals. Each random access procedure is associated with a specific system frame number, allowing wireless devices to distinguish between different procedures and avoid collisions. This segmentation enables multiple devices to initiate random access simultaneously without interference by providing unique identifiers for each procedure.

Inventive Principle:

Principle #1Segmentation

2Reliability

If system frame numbers are included in downlink control signals to distinguish random access procedures, then collision avoidance is improved, but signal structure complexity increases

Engineering Contradiction:

Improverandom access procedure distinction accuracyVSAvoiddownlink control signal structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies universality by reusing the existing system frame number field in downlink control signals for a dual purpose: maintaining the original timing indication function while simultaneously serving as an identifier to distinguish different random access procedures. This approach avoids adding entirely new signal structures, instead leveraging the existing multi-functional capability of the system frame number field to achieve procedure distinction without proportionally increasing complexity.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS12588055B2Random access response reception

Publication Date: 2026.03.24 COMCAST CABLE COMM LLC

AI summary

Wireless communications for random access procedures are described. One or more downlink control messages may indicate a system frame number corresponding to a random access preamble. The one or more downlink control messages may indicate the system frame number in a field and/or using a radio network identifier.