HMD Main Beam Direction Determination via Posture-Based Sector Selection

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Solution Overview

Problem

Existing head-mounted display (HMD) systems face challenges in quickly determining the main beam direction due to frequent changes in user head orientation, leading to prolonged time requirements for adjusting the antenna direction during wireless communication.

Innovation Solution

A method is introduced that utilizes a head-mounted display with a sensor system to specify the posture and select secondary candidate sectors based on the user's head orientation, reducing the number of sectors requiring communication quality negotiation, thereby shortening the time to determine the main beam direction.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If sector level sweep is used to determine main beam direction from all candidate sectors, then communication quality is ensured, but time required for determination increases

Engineering Contradiction:

Improvecommunication qualityVSAvoidtime required for determining main beam direction

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The system performs preliminary action by specifying candidate sectors based on antenna direction before conducting sector level sweep. This pre-filtering reduces the number of sectors that need to be evaluated, thereby shortening the determination time while maintaining communication quality through the remaining candidate sectors.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The sector level sweep process is segmented into two stages: first, candidate sectors are specified based on antenna direction information; second, sector level sweep is performed only on these specified candidates. This segmentation divides the originally comprehensive search into a focused evaluation phase, reducing overall processing time.

Inventive Principle:

Principle #1Segmentation

2Loss of time

If the number of candidate sectors is reduced based on antenna direction, then determination time is shortened, but measurement precision may deteriorate

Engineering Contradiction:

Improvetime required for determining main beam directionVSAvoidaccuracy of main beam direction determination

Core Design Contradiction:

Loss of timeVSMeasurement precision

Solution Approach 1:

The system uses feedback from antenna direction information to dynamically specify candidate sectors. The antenna direction serves as feedback that guides the selection of promising sectors, ensuring that the reduced set of candidates still includes the optimal main beam direction while minimizing determination time.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP3343799B1Main beam direction determination device, head-mounted display, method for determining main beam direction, and program

Publication Date: 2023.12.27 SONY INTERACTIVE ENTERTAINMENT LLC

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AI summary

There are provided a main beam direction determining device, a main beam direction determining method, and a program each of which is capable of shortening a time required for determination of a main beam direction of a head-mounted display. A secondary candidate sector selecting portion (56) selects a part of a plurality of primary candidates as secondary candidates in response to a posture of an HMD (12). A sector level sweep processing executing portion (58) determines a main beam direction of the HMD (12) based on communication qualities when communications by the respective secondary candidates are performed from the secondary candidates.