Transmit Queue Suspension for Unavailable WLAN Receivers
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Solution Overview
Problem
Communication networks face issues when receiving stations become temporarily unavailable, such as during scans in IEEE 802.11 WLAN standards, leading to incomplete data transfers as applications cannot complete due to unavailability of target stations.
Innovation Solution
Implementing a process that determines the availability of target stations by setting a suspension period for transmit queues, allowing for reattempting transmission once the station becomes available, and managing queues to handle temporary unavailability without reestablishing communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a transmitting station continues to transmit data to a receiving station that becomes unavailable (e.g., during background scans), then the application can attempt data transfer, but the transmission cannot complete successfully and data integrity is compromised
Solution Approach 1:
The patent implements dynamic suspension and resumption of transmit queues based on receiver availability. The system dynamically adjusts the state of transmission queues by suspending them when receivers become unavailable and resuming them when receivers become available again, allowing the system to adapt to changing network conditions without requiring link reestablishment
Solution Approach 2:
The patent employs feedback mechanisms where the transmitting station monitors the availability status of receiving stations and adjusts transmission behavior accordingly. When a receiver is detected as unavailable, the system suspends the transmit queue and attempts to resume it later, creating a closed-loop control system that responds to receiver status changes
2Reliability
If a transmitting station suspends transmission to an unavailable receiving station, then data integrity is maintained, but transmission time is delayed until the receiver becomes available
Solution Approach 1:
The patent implements preliminary suspension of transmit queues when receiver unavailability is detected, rather than allowing failed transmission attempts. This preliminary action prevents wasted transmission time on unavailable receivers and prepares the system for quick resumption when the receiver becomes available, reducing overall transmission delay
3Productivity
If communication links are reestablished when receivers become available, then data transmission can resume, but overhead is increased due to link reestablishment procedures
Solution Approach 1:
The patent extracts the link reestablishment overhead by maintaining the communication link in a suspended state rather than completely tearing it down and reestablishing it. The transmit queue suspension mechanism separates the data transmission state from the link state, allowing quick resumption without full link reestablishment procedures
Data Source
AI summary
Transmissions may be scheduled in communication networks to accommodate the possibilities that target receivers are unavailable to receive.