Data Unit Receiver Reordering Detection Gap Response

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Solution Overview

Problem

Existing data unit communication methods inadequately distinguish between data unit loss and reordering, leading to inefficient gap detection and response procedures, as they primarily assume data unit loss without accounting for reordering phenomena.

Innovation Solution

Implementing an explicit reordering detection procedure in data unit receivers and senders to identify reordering indications, which adapts the gap detection and response procedures to differentiate between reordering and loss, thereby improving communication performance by adjusting responses based on the most probable cause of gaps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If gap detection and response procedures assume data unit loss, then data unit loss can be detected and responded to, but unnecessary retransmissions occur when reordering is the actual cause

Engineering Contradiction:

Improvegap detection accuracyVSAvoidretransmission efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The gap detection and response procedure dynamically adapts its behavior based on detected reordering indications. When reordering is detected, the procedure modifies its gap detection thresholds and response actions to account for the reordered sequence, preventing unnecessary retransmissions while maintaining reliable gap detection for actual losses.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system implements feedback mechanisms where the detected reordering indication feeds back into the gap detection and response procedure. This feedback loop allows the system to adjust its gap detection sensitivity and response strategy based on the current network condition (reordering vs. loss), optimizing both detection accuracy and retransmission efficiency.

Inventive Principle:

Principle #23Feedback

2Measurement precision

If reordering detection procedure is implemented, then reordering events can be identified, but system complexity increases

Engineering Contradiction:

Improvereordering detection accuracyVSAvoidprocedure complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The overall data unit processing procedure is segmented into distinct functional components: a reordering detection procedure that independently identifies reordering indications, and a gap detection and response procedure that receives input from the reordering detection. This segmentation allows each component to be optimized independently while reducing overall system complexity through modular design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reordering detection procedure performs preliminary analysis of data unit sequences to detect reordering indications before the gap detection and response procedure executes. By performing this detection in advance, the system prepares the gap response mechanism with accurate context information, simplifying the subsequent gap handling logic and reducing overall procedural complexity.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS8712336B2Data unit receiver and sender control method

Publication Date: 2014.04.29 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A method is described for controlling a data unit receiver or a data unit sender. The data unit receiver or sender comprise a gap response procedure for responding to gaps in the sequence of data units received at the receiver. A reordering detection procedure S12 is provided for detecting a reordering indication indicative of a potential re-ordering of data units in the course of a transmission from sender to receiver, and the gap response procedure is adapted in response to detecting a re-ordering indication.