Dynamic Response Deferral Counter in Wireless Networks

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Solution Overview

Problem

Conventional wireless communication protocols in WLANs set static response deferral times, leading to excessive response deferral times and reduced throughput efficiency due to mismatched delay and channel utilization requirements among devices with different QoS needs.

Innovation Solution

A method and apparatus for dynamically updating the response indication deferral counter based on the received PPDU, where the counter value is adjusted according to the same basic service set, allowing for more precise and adaptive response deferral times.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a predetermined static response indication deferral counter value is used, then data transmission collisions are avoided, but excessive response deferral times occur and throughput efficiency is reduced

Engineering Contradiction:

Improvedata transmission collision avoidanceVSAvoidthroughput efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent applies dynamics by transitioning from a static predetermined response indication deferral counter value to a dynamic value that is updated based on received PPDU information. The counter value is no longer fixed but adapts according to the actual transmission conditions and QoS requirements, allowing the system to optimize between collision avoidance and throughput efficiency in real-time.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes the parameter of the response indication deferral counter from a static predetermined value to a dynamic value that can be modified based on received PPDUs. The counter value is updated according to the RI field in received PPDUs, enabling the system to adjust the deferral time parameter to match actual network conditions and QoS requirements.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If a predetermined static response indication deferral counter value is used, then collision avoidance is maintained, but delay and channel utilization requirements for different QoS devices are not met

Engineering Contradiction:

Improvecollision avoidanceVSAvoidQoS requirement satisfaction

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies local quality by allowing different wireless stations to have different response indication deferral counter values based on their specific QoS requirements and the PPDUs they receive. Instead of a uniform static value for all devices, each station can independently update its counter based on local received information, enabling differentiated treatment for devices with different QoS needs.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent enables the system to adapt dynamically to different QoS requirements by allowing the response indication deferral counter value to be updated based on received PPDU information. This dynamic adjustment allows the system to meet varying delay and channel utilization requirements for different devices while maintaining collision avoidance.

Inventive Principle:

Principle #15Dynamics

3Productivity

If the response indication deferral counter is updated dynamically based on received PPDU, then throughput efficiency is enhanced and QoS requirements are aligned, but protocol complexity increases

Engineering Contradiction:

Improvethroughput efficiencyVSAvoidprotocol complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The patent implements feedback by using the RI field in received PPDUs to update the response indication deferral counter value. The system receives feedback information from the network through the PPDU and uses this feedback to adjust its transmission behavior, enabling dynamic optimization of throughput efficiency while managing protocol complexity through a structured feedback mechanism.

Inventive Principle:

Principle #23Feedback

4Reliability

If excessive response deferral times are used, then data transmission collisions are avoided, but channel utilization is reduced and throughput is decreased

Engineering Contradiction:

Improvedata transmission collision avoidanceVSAvoidchannel utilization efficiency

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent changes the response indication deferral counter parameter from a fixed excessive value to a dynamic value that is updated based on received PPDU information. This parameter change allows the system to reduce unnecessarily long deferral times while maintaining collision avoidance, thereby improving channel utilization efficiency and reducing energy loss.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9807794B2Systems, methods and devices for dynamically setting response indication deferral in wireless networks

Publication Date: 2017.10.31 QUALCOMM INC

AI summary

Methods and apparatuses for wireless communication are provided. A method for wireless communication comprises receiving a first physical layer protocol data unit. The method further comprises receiving a second PPDU. The method further comprises updating a value of a response indication deferral counter to a value indicated by the second PPDU when the second PPDU is associated with a same basic service set as the first PPDU. The method further comprises updating the response indication deferral counter to the value indicated by the second PPDU when the second PPDU is associated with a different basic service set than the first PPDU and the indicated value is not less than a current value of the response indication deferral counter. The current value of the response indication deferral corresponds to a value of the response indication deferral counter when the end of the second PPDU is received.