Service Flow Packet Handling for Failed Critical Packet Transmission

Solution Overview

Problem

In 5G and evolving 5G systems, high-bandwidth, interactive services like cloud gaming, VR, AR, MR, and XR generate large data packets that require low latency transmission. If one packet fails, retransmission often cannot meet the time delay requirements, and existing solutions are inadequate for ensuring timely recovery of associated packets.

Innovation Solution

A data transmission method that identifies critical packets affecting recovery of others and stops transmitting associated packets when a failure is detected, reducing the transmission of invalid packets to improve efficiency and resource utilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If data packets are transmitted in segments with retransmission capability, then transmission reliability is improved, but time delay requirement cannot be met when retransmission is needed

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtime delay

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-segmenting data into packets and pre-establishing their inter-dependent relationships before transmission. When a critical packet fails, the system has already identified which dependent packets would be invalid, allowing immediate cessation of their transmission without requiring post-failure analysis, thus reducing time delay while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of transmitting all segmented packets and then handling failures, the patent inverts the approach by proactively identifying critical packets and their dependencies beforehand. When a critical packet transmission fails, the system immediately stops transmitting dependent packets that would otherwise be wasted, thereby reducing unnecessary retransmission time and improving overall efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If all segmented data packets are transmitted, then complete data delivery is achieved, but wireless resource utilization deteriorates due to transmission of invalid packets

Engineering Contradiction:

Improvedata delivery completenessVSAvoidwireless resource utilization

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent extracts and identifies critical packets from the segmented data stream and establishes their dependency relationships. When a critical packet transmission fails, the system extracts and removes the identifiers of all dependent packets from the transmission queue, preventing their transmission. This selective removal of invalid packets from the transmission set improves wireless resource utilization while maintaining data delivery completeness for valid packets.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The patent applies discarding and recovering by identifying packets that would become invalid due to critical packet failure and proactively discarding their transmission. The system recovers wireless resources by stopping transmission of these invalid packets immediately upon detecting critical packet failure, rather than wasting resources transmitting them and then discarding them at the receiver端 after failure.

Inventive Principle:

Principle #34Discarding and recovering

3Reliability

If retransmission is performed for failed packets, then transmission reliability is improved, but time delay requirement cannot be met for strong interactive services

Engineering Contradiction:

Improvetransmission reliabilityVSAvoidtime delay for interactive services

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-segmenting data into packets and pre-establishing their inter-dependent relationships before transmission. When a critical packet fails, the system has already identified which dependent packets would be invalid, allowing immediate cessation of their transmission without requiring post-failure analysis, thus reducing time delay while maintaining reliability.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Instead of transmitting all segmented packets and then handling failures, the patent inverts the approach by proactively identifying critical packets and their dependencies beforehand. When a critical packet transmission fails, the system immediately stops transmitting dependent packets that would otherwise be wasted, thereby reducing unnecessary retransmission time and improving overall efficiency.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS12556307B2Reducing transmission of data packets in data trnasmission

Publication Date: 2026.02.17 TENCENT TECHNOLOGY (SHENZHEN) CO LTD

AI summary

In a method for data transmission, a plurality of data packets is received from a user plane function (UPF) entity of a core network. Each of the plurality of data packets is associated with a same service flow identifier. The received plurality of data packets is transmitted to user equipment (UE). When the transmission to the UE of one of the plurality of data packets fails and the one of the plurality of data packets is identified as a first data packet type that affects recovery of at least one other data packet in the plurality of packets, the transmission of the at least one other data packet in the plurality of data packets is stopped.