Wireless Timing Determination via Blind Msg3 Detection

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Solution Overview

Problem

High-frequency wireless communication systems, particularly those using millimeter waves around 52.6 GHz and above, face challenges in random access and timing due to the ubiquity of beamforming with small beams, leading to complications in determining accurate transmission timing for wireless devices.

Innovation Solution

A method and apparatus for determining transmission timing for wireless devices in wireless communication networks, utilizing blind detection of random access messages and reference signaling to improve timing accuracy, especially in 5G and future generation networks, by using techniques such as blind detection of msg3 and reference signaling associated with msg3, allowing for precise timing indications to be transmitted to wireless devices.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If beamforming with small beams is used at high frequencies, then communication bandwidth and data rate are improved, but timing determination accuracy deteriorates

Engineering Contradiction:

Improvecommunication bandwidthVSAvoidtiming determination accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent applies preliminary action by having the wireless device transmit a random access message (msg3) before the network node determines the final timing. The msg3 transmission serves as a preliminary timing reference that the network node can use to calculate and communicate back a timing adjustment indication, enabling accurate timing synchronization before actual data transmission begins.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent implements feedback by having the network node determine timing based on the received msg3, calculate a timing adjustment, and communicate this timing indication back to the wireless device. This closed-loop feedback mechanism allows the network node to correct timing offsets and maintain accurate synchronization despite beamforming challenges at high frequencies.

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If blind detection of msg3 is used, then timing determination can be achieved without prior scheduling information, but detection complexity and error rate increase

Engineering Contradiction:

Improvetiming determination capabilityVSAvoiddetection complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies the color changes principle by using different reference signal sequences (analogous to different colors) that are orthogonal or nearly orthogonal to each other. The network node can detect which specific sequence was transmitted in msg3, enabling identification of the timing information without complex blind detection of the entire message content.

Inventive Principle:

Principle #32Color changes

Solution Approach 2:

The patent uses reference signals as an intermediary element between the msg3 transmission and timing determination. Instead of directly analyzing the complex msg3 content for timing information, the network node detects the simpler reference signal sequences, which serve as mediators that carry timing information in a more detectable form.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS20230379965A1Random access timing

Publication Date: 2023.11.23 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

There is disclosed a method of a signaling radio node for a wireless communication network. The method includes determining a transmission timing for a wireless device based on a random access message 3 received from the wireless device. The disclosure also pertains to related devices and methods.