Dynamic Backoff Adjustment for Low Jitter Wireless Data Transmission
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Solution Overview
Problem
Current data transmission methods in wireless networks, such as those following the IEEE 802.11 protocol, face challenges in maintaining low latency and reducing latency jitter, leading to inefficiencies in services like real-time mobile games due to fixed backoff times and inflexible priority differentiation.
Innovation Solution
A method and apparatus that dynamically adjust the backoff value and tolerance of a low jitter access category by setting a first tolerance value and reducing it to a second value when zero, allowing for flexible backoff and improved data transmission efficiency by transmitting data frames when the backoff count reaches zero.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed backoff time is used in traditional wireless networks, then device complexity is reduced and operation is simplified, but data transmission efficiency deteriorates and latency jitter increases
Solution Approach 1:
The patent implements dynamic backoff adjustment by introducing a tolerance parameter that is dynamically reduced when latency requirements are met. The backoff value is adjusted from a first backoff value to a second backoff value (which is smaller) when the tolerance decreases to zero, enabling the system to adapt transmission behavior to real-time network conditions and service requirements, thereby improving data transmission efficiency while maintaining manageable complexity through structured parameter control.
2Reliability
If traditional priority differentiation is used, then implementation is simple, but service quality differentiation deteriorates and latency requirements cannot be met
Solution Approach 1:
The patent applies local quality by creating a specialized Low Jitter (LJ) access category with distinct characteristics from traditional access categories. The LJ access category implements unique tolerance parameters and dynamic backoff adjustment mechanisms specifically tailored for latency-sensitive services, while other access categories maintain traditional behavior. This localized enhancement provides targeted service quality differentiation without requiring complete system redesign.
Solution Approach 2:
The patent utilizes parameter changes by introducing and manipulating the tolerance parameter within the LJ access category. When the tolerance decreases to zero, the system changes the backoff value from a first backoff value to a second backoff value, and resets the tolerance to a second tolerance value (less than or equal to the first). These parameter transformations enable precise control over transmission timing to meet latency requirements while maintaining systematic management.
3Ease of operation
If dynamic backoff adjustment is implemented, then data transmission efficiency is improved and latency jitter is reduced, but control complexity increases
Solution Approach 1:
The patent implements feedback mechanisms by continuously monitoring the tolerance parameter and using its state to drive backoff adjustments. When the tolerance decreases to zero, the system receives feedback that latency requirements have been satisfied, triggering the transition from the first backoff value to the second backoff value and resetting the tolerance. This closed-loop control automates the adjustment process, improving ease of operation and user experience while managing control complexity through rule-based decision making.
Data Source
AI summary
Embodiments of this disclosure include a method and an apparatus for transmitting data. The method may include, in response to a data frame entering a low jitter (LJ) access category, setting an LJ tolerance of the LJ access category to a first tolerance value. The method may further include, in response to a value of the LJ tolerance decreasing to zero, setting the LJ tolerance to a second tolerance value and setting a backoff count of the LJ access category from a first backoff value to a second backoff value. The second tolerance value may be less than or equal to the first tolerance value. The second backoff value may be less than the first backoff value. The method may further include transmitting the data frame to a target station using the LJ access category in response to the backoff count decreasing to zero.