RAN-Aware XR Packet Transmission for Adaptive Bitrate Control
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Solution Overview
Problem
Existing technologies for augmented, virtual, and mixed reality systems do not effectively utilize radio-access network (RAN) awareness information for optimizing quality of service (QoS) metrics, leading to potential network congestion and degraded user experience due to latency and bitrate adjustments based on outdated or indirect congestion indicators.
Innovation Solution
Wireless communication endpoints receive direct RAN awareness information through MAC CE or RRC signaling, allowing them to adjust packet generation and transmission based on real-time QoS metrics, such as data rate and traffic levels, to optimize bitrate and reduce network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If wireless communication endpoints use indirect or outdated congestion indicators to adjust bitrate, then network coverage is maintained, but latency increases and user experience degrades
Solution Approach 1:
The patent implements a feedback mechanism where the wireless communication node provides real-time RAN awareness information including QoS metrics (packet drop rate, time delay, data rate) to the wireless communication endpoint. This feedback loop enables the endpoint to continuously adjust its bitrate based on current network conditions, reducing latency and improving user experience by avoiding outdated or indirect congestion indicators.
Solution Approach 2:
The wireless communication node performs preliminary measurement and evaluation of QoS metrics before transmitting congestion information to the endpoint. By proactively monitoring and preparing RAN awareness information, the system can provide advance warnings about network conditions, allowing the endpoint to adjust bitrate in anticipation of congestion rather than reacting after degradation has occurred.
2Adaptability or versatility
If wireless communication nodes provide detailed real-time QoS metrics through signaling, then adaptive bitrate adjustment is enabled, but signaling overhead increases
Solution Approach 1:
The patent reuses existing multi-functional signaling mechanisms (MAC CE and RRC signaling) that are already part of the wireless communication standard for RAN awareness. Rather than creating dedicated new signaling channels, the system leverages existing infrastructure to convey QoS metrics, thereby enabling detailed real-time data transmission while avoiding additional signaling overhead.
Solution Approach 2:
The system dynamically adjusts the level of detail in QoS metric reporting based on network conditions and endpoint capabilities. The wireless communication node can selectively report different QoS parameters (packet drop rate, time delay, data rate) depending on current network state, providing detailed metrics only when necessary to enable effective adaptive bitrate adjustment.
3Productivity
If wireless communication endpoints transmit packets at high bitrate without real-time network awareness, then data transmission speed is maximized, but network congestion increases
Solution Approach 1:
The patent implements dynamic bitrate adjustment where the wireless communication endpoint continuously modifies its transmission bitrate based on real-time RAN awareness information. Instead of maintaining a fixed high bitrate, the system dynamically adapts to changing network conditions (packet drop rate, time delay, data rate) to optimize transmission speed while preventing congestion.
Solution Approach 2:
The wireless communication endpoint autonomously adjusts its own transmission parameters using received RAN awareness information without requiring explicit control commands from the network node. The endpoint self-regulates its bitrate based on the QoS metrics, enabling decentralized congestion management while maintaining high transmission efficiency.
Data Source
AI summary
Systems and methods for extended reality services by enabling radio-access network awareness may include an endpoint which receives, from a wireless communication node, signaling indicating radio-access network (RAN) awareness information including one or more quality of service (QoS) metrics for the wireless communication node. The endpoint may transmit one or more packets to the wireless communication node according to the QoS metrics from the RAN awareness information received from the wireless communication node.