PDU Set Size Pre-compensation for Media Data Transport
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Solution Overview
Problem
Changes in IP address types, IP fragmentation, and segment routing can lead to inaccurate PDU Set sizes during media data transmission, resulting in resource wastage or insufficiency.
Innovation Solution
A sending device pre-compensates the calculated PDU Set size by multiplying it with a ratio value sent by the destination device, which represents the actual PDU Set size to the signaled PDU Set size, to account for IP address type differences and other network operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the PDU Set size is calculated based on initial IP address types, then resource allocation can be performed, but the PDU Set size becomes inaccurate due to IP address type changes, fragmentation, and segment routing
Solution Approach 1:
The patent applies preliminary action by having the receiving device calculate and send back a ratio value before the sending device performs resource allocation for subsequent PDU Sets. The receiving device measures the actual PDU Set size after network processing (IP address type changes, fragmentation, segment routing) and computes the ratio between actual and initial size. This pre-calculated ratio is then used by the sending device to adjust future resource allocations, eliminating the need for complex real-time monitoring of network transformations.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop communication where the receiving device sends the ratio value back to the sending device. This feedback mechanism allows the sending device to continuously refine its PDU Set size calculations based on actual network behavior observed at the receiving end. The feedback loop enables adaptive resource allocation that automatically compensates for IP address type changes, fragmentation, and segment routing effects without requiring the sending device to track these complex network transformations.
2Reliability
If the PDU Set size is adjusted to account for network transformations, then resource allocation accuracy improves, but the signaling and calculation overhead increases
Solution Approach 1:
The patent applies parameter changes by transforming the complex multi-factor network transformation problem into a single ratio parameter. Instead of tracking multiple independent factors (IP address type changes, fragmentation patterns, segment routing paths), the system consolidates all these effects into one composite ratio value that represents the total size transformation. This single parameter approach maintains high reliability in resource allocation while minimizing signaling overhead, as only one ratio value needs to be exchanged rather than multiple separate parameters.
3Productivity
If the PDU Set size is calculated without compensation, then the calculation is simple, but resources are either wasted or insufficiently allocated
Solution Approach 1:
The patent applies self-service by enabling the receiving device to autonomously measure and characterize the network transformation effects experienced by PDU Sets. The receiving device independently calculates the ratio between actual and initial PDU Set sizes based on its local observations, without requiring the sending device to implement complex monitoring or prediction mechanisms. This self-service approach at the receiving end provides the sending device with accurate compensation factors, thereby eliminating resource wastage and ensuring efficient resource allocation through empirically derived correction values.
Data Source
AI summary
An example device for retrieving media data includes: a memory configured to store media data; and a processing system implemented in circuitry, the processing system being configured to: calculate a cumulative size of packets of a protocol data unit (PDU) Set received from a source device; determine a signaled size for the PDU Set; calculate a ratio between the cumulative size and the signaled size; and send data representative of the ratio to the source device.