Wireless Device Discovery Frame Transmission Interval Adjustment

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Solution Overview

Problem

In wireless communication networks, discovery frames often face congestion during discovery windows, leading to transmission failures and increased power consumption due to high contention among stations attempting to transmit during short windows.

Innovation Solution

A wireless communication device adjusts its transmission interval for discovery frames based on the observed congestion during discovery windows, increasing the interval if the medium is busy and decreasing it if it is not, to mitigate congestion and ensure successful frame transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple stations transmit discovery frames during short discovery windows using contention mechanism, then device discovery capability is enabled, but network congestion increases and transmission failure rate increases

Engineering Contradiction:

Improvedevice discovery capabilityVSAvoidtransmission success rate

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary actions by determining device density and estimating congestion levels before the discovery window occurs. Based on these preliminary assessments, stations pre-calculate their transmission intervals and backoff counters, allowing them to transmit at optimal times without causing congestion during the actual discovery window.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The transmission interval is made dynamic rather than fixed. Stations adjust their transmission intervals based on real-time congestion levels and device density estimates. The backoff counter mechanism allows stations to dynamically select transmission timing within the discovery window, adapting to current network conditions to avoid collisions and congestion.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple stations transmit discovery frames during short discovery windows using contention mechanism, then device discovery capability is enabled, but power consumption increases due to repeated transmission attempts

Engineering Contradiction:

Improvedevice discovery capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

Stations independently determine their transmission parameters based on local observations of congestion and device density. Each station autonomously calculates its own backoff counter and transmission interval without requiring centralized coordination, reducing overall system complexity and energy consumption while maintaining effective discovery capability.

Inventive Principle:

Principle #25Self-service

3Device complexity

If transmission interval is fixed, then system complexity is reduced, but congestion cannot be effectively mitigated and transmission reliability decreases

Engineering Contradiction:

Improvesystem complexityVSAvoidtransmission success rate

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The system changes the transmission interval parameter dynamically based on network conditions. Instead of using a fixed interval, stations adjust their intervals according to congestion levels and device density. The backoff counter mechanism provides a structured way to vary transmission timing while maintaining system manageability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The system implements feedback mechanisms where stations monitor congestion levels during discovery windows and use this information to adjust their transmission intervals for subsequent windows. This feedback loop allows the system to adapt to changing network conditions and improve transmission reliability over time.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP2995132B1Apparatus, system and method of adjusting transmission intervals for discovery frames

Publication Date: 2019.11.06 INTEL CORP

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AI summary

Some demonstrative embodiments include apparatuses, systems and/or methods of adjusting transmission intervals for discovery frames. For example, an apparatus may include a wireless communication unit to communicate over a wireless communication medium according to a discovery scheme including a plurality of contention-based discovery windows, the wireless communication unit is to select a discovery window according to a transmission interval, to schedule transmission of a discovery frame for the discovery window, and to adjust the transmission interval based on whether or not the wireless communication medium is observed to be busy during a predefined time period of the discovery window.