Relay System Calibration for HMD Wireless Link Quality
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In virtual and augmented reality systems, the quality of wireless communication between a head-mounted display (HMD) and a console deteriorates when the HMD moves out of range, leading to a choppy user experience due to path loss, especially when high-quality links cannot be maintained over large areas.
Innovation Solution
A relay system is introduced that acts as an intermediary between the HMD and the console, using dual band or dual polarization to connect and communicate, with a calibration module to eliminate undesirable feedback between antenna arrays, allowing seamless switching of communication links to maintain high-quality wireless connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If beam forming is used to compensate for path loss, then link quality is maintained above threshold, but the range is limited and link quality degrades when HMD moves out of range
Solution Approach 1:
A relay device is introduced as an intermediary node between the base station and HMD. The relay receives signals from the base station, processes them, and retransmits to the HMD, enabling extended communication range while maintaining link quality through the relay's beam forming capabilities
2Reliability
If narrow beam communication is used, then link quality is improved, but the system is sensitive to HMD position changes
Solution Approach 1:
The relay device dynamically adjusts beam directions and communication paths based on real-time HMD position information. When HMD moves, the relay updates its beam forming parameters to maintain optimal link quality, providing both high reliability and position flexibility
3Reliability
If dual band or dual polarization is used for relay communication, then interference is reduced and link quality is maintained, but device complexity increases
Solution Approach 1:
The relay device utilizes dual band or dual polarization parameters to establish communication paths. By changing frequency bands or polarization states, the relay can avoid interference and maintain link quality without requiring complex hardware modifications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The relay system ensures continuous high-quality wireless communication by switching between direct and relay-mediated links, minimizing interference and maintaining link quality even as the HMD moves, thereby enhancing the user experience in VR, AR, and MR systems.
Implementation Method 1
A base station (e.g., console) that wirelessly communicates with a client (e.g., HMD) based on 60 GHz carrier frequency employs beam forming to compensate for a path loss and maintain a quality of wireless link above a predetermined threshold value
Implementation Method 2
The relay includes a radio-frequency (RF) circuit that enables bi-directional receive, amplify, and forward functionality of data packets being transmitted between the console and the HMD
Implementation Method 3
A calibration module in the relay iteratively adjusts a noise reduction parameter until the effects of the undesirable feedback are eliminated
Data Source
AI summary
A head-mounted display (HMD) is wirelessly coupled to a console or a relay depending on the relative positions of the HMD, the console, and the relay. The HMD communicates wirelessly with the console using a narrow beam that is oriented in a particular direction. As the position of the HMD changes, the quality of the communication link between the HMD and the console may degrades. In response to the degradation, the HMD forms a communication link with a relay, which operates as an intermediary between the HMD and the console. The relay communicates with the HMD over a dedicated communication channel that is isolated from the communication channel over which the relay communicates with the console. A calibration module in the relay iteratively adjusts a noise reduction parameter until the effects of the undesirable feedback are eliminated.