Wireless HD AV Packet Format for 60 GHz Interference
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Solution Overview
Problem
Current wireless communication technologies face challenges in securely and efficiently transmitting high-definition audio and video content over unlicensed millimeter-wave frequencies, particularly around 60 GHz, where interference and obstacle avoidance are significant issues.
Innovation Solution
A wireless communication system utilizing a media access controller (MAC) and physical device interface (PHY) with high and low rate physical layer circuits, coupled with a radio frequency transmitter, enables secure and adaptive beamforming antenna technology for obstacle avoidance and content protection, allowing for bi-directional communication channels to manage antenna steering and encryption key transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless communication is used to transmit HD content over 60 GHz unlicensed spectrum, then transmission flexibility and mobility are improved, but interference from obstacles and other sources increases
Solution Approach 1:
The patent implements dynamic beamforming that continuously adapts antenna patterns and transmission parameters based on real-time channel conditions, obstacle detection, and interference levels. The system adjusts beam directions, widths, and frequencies dynamically to maintain reliable HD content transmission despite the harmful effects of wireless interference at 60 GHz
Solution Approach 2:
The system changes multiple transmission parameters including frequency selection, modulation schemes, coding rates, and antenna beam characteristics based on channel quality indicators. When interference is detected, the system transitions between different parameter sets to maintain transmission reliability while preserving the flexibility advantage of wireless communication
2Reliability
If beamforming antenna technology is used for obstacle avoidance, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The patent divides the complex beamforming task into separate functional modules: channel estimation unit, beam selection unit, phase shifting control unit, and signal processing unit. Each module handles a specific aspect of beamforming, making the overall system more manageable and implementable while maintaining transmission reliability through coordinated operation of these segmented components
Solution Approach 2:
The patent introduces intermediary processing stages including channel quality indicators (CQI) and beam management protocols that mediate between the physical antenna array and the higher-layer transmission functions. These intermediaries simplify control by providing standardized interfaces and abstraction layers, reducing the apparent complexity while preserving transmission reliability
3Reliability
If re-authentication occurs every two seconds to maintain security, then content protection is improved, but transmission continuity may be interrupted
Solution Approach 1:
The patent implements periodic re-authentication at defined intervals (e.g., every two seconds) while using continuous encryption and buffered transmission to mask the periodic interruptions. The periodic security checks are synchronized with transmission frames, and buffering ensures that brief authentication pauses do not create perceptible gaps in HD content delivery, thus maintaining both security and perceived continuity
4Reliability
If encryption and authentication are implemented for content protection, then security is improved, but processing overhead increases
Solution Approach 1:
The patent combines multiple security functions including authentication, encryption key management, and content protection into integrated hardware security modules and unified protocol stacks. By merging these functions into cohesive units rather than separate processing stages, the system achieves strong content protection while reducing the cumulative processing overhead that would result from implementing each security function independently
Data Source
AI summary
An audio/video (AV) processor is coupled to a media access controller (MAC) to generate a composite packet having an optimized format for carrying audio, video, and data traffic with fields in a header of the composite packet specifying video-specific information. A physical device interface (PHY) is coupled to the MAC. The PHY encodes and decodes between a digital signal and a modulated analog signal. The PHY comprises a high rate physical layer circuit (HRP) and a low rate physical layer circuit (LRP). A radio frequency (RF) transmitter is coupled to the PHY to transmit data.