Reverse Link Superframe Synchronization and Noise Measurement

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Solution Overview

Problem

Current wireless communication systems face inefficiencies in reverse link transmission due to the lack of a preamble in reverse link physical frames, leading to desynchronization with forward link transmissions and suboptimal resource utilization.

Innovation Solution

The method involves modifying the superframe structure by elongating or repeating the first reverse link physical frame to align with the forward link preamble, allowing for synchronization and efficient resource allocation, including a silent period for noise variance measurement to enhance load control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If reverse link physical frames transmit data continuously without preamble, then resource utilization is high, but desynchronization with forward link transmissions occurs and resource allocation becomes suboptimal

Engineering Contradiction:

Improveresource utilizationVSAvoidsynchronization

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by inserting a preamble before reverse link data transmission. This preamble is transmitted in advance to establish synchronization between forward and reverse links, enabling the access node to properly align and allocate resources for subsequent data frames, thus resolving the desynchronization issue while maintaining efficient resource utilization

Inventive Principle:

Principle #10Preliminary action

2Duration of action of moving object

If reverse link transmission lacks preamble structure, then transmission continuity is maintained, but synchronization with forward link preamble is lost

Engineering Contradiction:

Improvetransmission continuityVSAvoidsynchronization alignment

Core Design Contradiction:

Duration of action of moving objectVSLoss of time

Solution Approach 1:

The patent implements periodic action by structuring reverse link transmissions into periodic frames, each beginning with a preamble. This periodic preamble structure occurs at regular intervals (each frame), maintaining transmission continuity while ensuring periodic synchronization alignment with forward link transmissions, preventing loss of synchronization over time

Inventive Principle:

Principle #19Periodic action

3Measurement precision

If access node measures noise variance during ongoing transmissions, then measurement can be performed continuously, but measurement accuracy is reduced due to interference

Engineering Contradiction:

Improvenoise variance measurement accuracyVSAvoidtransmission interruption

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies the extraction principle by separating the noise variance measurement function from ongoing data transmissions. A dedicated silent period is extracted from the frame structure, during which all access terminals cease transmission. This isolated measurement window eliminates interference from other transmissions, enabling accurate noise variance measurement without significantly impacting overall transmission time

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP2039020B1A method of utilizing resources efficiently in a reverse link transmission

Publication Date: 2019.02.27 LG ELECTRONICS INC

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AI summary

A method of transmitting data by at least one access terminal (AT) in a wireless communication system is disclosed. More specifically, the method includes ceasing all transmissions by the at least one AT during a duration corresponding to a duration used by an access node (AN) to transmit a superframe preamble, wherein the superframe comprises a plurality of physical frames.