IoT TWT Grouping for Uplink Transmission Efficiency
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Solution Overview
Problem
Current IoT network standards, such as IEEE 802.11ah and 802.11ax, lack detailed implementation guidelines for Target Wake Time (TWT) and STA grouping, particularly in uplink modes like OFDMA and UL-MUMIMO, which are crucial for optimizing IoT device transmissions in diverse environmental conditions and emergency scenarios.
Innovation Solution
A target wake time and grouping scheme that determines behavioral profiles of IoT devices to assign them to specific uplink transmission windows based on their transmission needs, predictability, and emergency levels, optimizing the allocation of UL-MUMIMO or OFDMA frame slots and dynamically adjusting these allocations in response to environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If TWT is used to allow IoT devices to sleep longer and reduce energy consumption, then energy efficiency is improved, but transmission collisions and contention risks increase when devices wake up simultaneously
Solution Approach 1:
The patent segments the large population of IoT clients into multiple groups that contend at different times. Each group is assigned specific TWT values, dividing the cell into quadrants where clients transmit in turns. This segmentation reduces contention and collision risks within each group while maintaining energy efficiency benefits.
Solution Approach 2:
The patent dynamically adjusts TWT values based on device behavior profiles. Devices are classified as occasional transmitters or periodic transmitters, and TWT assignments are optimized accordingly. This dynamic approach allows the system to adapt to changing transmission patterns while minimizing collisions and maintaining low energy consumption.
2Use of energy by moving object
If TWT assigns fixed transmission times to IoT devices, then energy efficiency is improved, but adaptability to diverse environmental conditions and emergency scenarios deteriorates
Solution Approach 1:
The patent implements dynamic TWT adjustment based on behavioral profiles. Devices are classified as occasional transmitters or periodic transmitters, and the system adapts TWT assignments to match their specific patterns. This allows the system to maintain energy efficiency while adapting to diverse transmission needs and environmental conditions.
Solution Approach 2:
The patent changes TWT parameters based on device behavior classification. By identifying whether devices are occasional or periodic transmitters, the system adjusts TWT values to optimize for each behavior type, enabling adaptability to diverse environmental conditions while preserving energy efficiency.
3Productivity
If behavioral profiling and grouping of IoT devices is implemented, then transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where devices automatically classify themselves as occasional or periodic transmitters based on their behavior patterns. This reduces the complexity burden on the central system while maintaining the benefits of behavioral-based grouping and optimized TWT assignments.
Solution Approach 2:
The patent uses parameter changes in behavioral profiles to manage complexity. By defining clear classification parameters (occasional vs. periodic transmitter), the system simplifies the grouping process while achieving efficient transmission scheduling through targeted TWT assignments for each category.
Data Source
AI summary
In one embodiment, a device in a network determines behavioral profiles of a plurality of nodes in the network. The behavioral profile for a particular node indicates whether the node is an occasional transmitter or a periodic transmitter. The device identifies similarly behaving nodes based on their behavioral profiles. The device assigns groups of the nodes to uplink transmission windows based on their behavioral profiles. The similarly behaving nodes that are periodic transmitters are assigned to the same uplink transmission windows and similarly behaving nodes that are occasional transmitters are assigned to different uplink transmission windows. The device controls the plurality of nodes to use their assigned uplink transmission windows via target wake time values sent to the plurality of nodes.