Wireless Packet Synchronization via Early Delivery and Margin Adjustment
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Solution Overview
Problem
Current communication systems fail to ensure synchronized delivery of different type media streams in multimedia services, leading to unacceptable edge-to-edge delays and skew between media types, which can exceed latency requirements for more time-sensitive streams.
Innovation Solution
The implementation of systems and methods that assist wireless devices and networks in synchronizing packet delivery for downlink and uplink transmissions by determining early delivery opportunities, adjusting synchronization margins, and allocating resources based on buffer status reports and latency budgets, ensuring that packets are delivered within end-to-end latency targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packets are delivered according to standard latency budgets, then delivery timing is predictable, but synchronized delivery of different media streams cannot be achieved
Solution Approach 1:
The base station determines early delivery opportunities for packets before the standard latency budget expires and sends packets earlier than scheduled. This preliminary action allows time-sensitive media streams to be delivered ahead of time, enabling synchronization across different media types while meeting latency requirements.
Solution Approach 2:
The system uses feedback mechanisms where the base station monitors packet delivery status and sends early delivery indications to wireless devices. This feedback loop enables dynamic adjustment of delivery timing to achieve synchronization while managing latency budgets effectively.
2Loss of time
If early delivery is implemented for time-sensitive streams, then latency requirements are met, but synchronization with other media streams is lost
Solution Approach 1:
The system applies different delivery strategies to different media streams based on their specific requirements. Time-sensitive streams receive early delivery treatment while other streams follow standard scheduling, with synchronization margins adjusted locally for each stream to maintain overall synchronization.
Solution Approach 2:
The base station dynamically adjusts synchronization margins and latency budgets as parameters for different media streams. By changing these parameters based on early delivery opportunities and stream priorities, the system maintains synchronization while meeting latency requirements for time-sensitive content.
3Reliability
If synchronization margins are adjusted for early delivery, then synchronized delivery is achieved, but system complexity increases
Solution Approach 1:
Wireless devices autonomously adjust their buffer status and reporting based on received early delivery indications. The devices self-manage synchronization by adjusting buffer status reports and uplink transmissions according to the indications received, reducing the need for complex base station control.
4Manufacturing precision
If buffer status reports are sent frequently for each media stream, then resource allocation accuracy is improved, but uplink overhead increases
Solution Approach 1:
The buffer status report mechanism serves multiple functions: it provides resource allocation information, indicates synchronization status, and triggers early delivery opportunities. This multi-functionality reduces the need for separate signaling messages, decreasing uplink overhead while maintaining allocation accuracy.
Data Source
AI summary
Various embodiments provide systems and methods for supporting synchronized delivery of packets of different type media streams of a service. Various embodiments enable wireless device and/or network assistance of packet synchronization in downlink (DL) and/or uplink (UL) transmissions.