MAC Data Aggregation for Multi-Segment WLAN Throughput
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Solution Overview
Problem
Current wireless local area network (WLAN) standards, such as IEEE 802.11, face challenges in efficiently managing communication over multiple channel segments, particularly in ensuring proper receipt and acknowledgment of data units transmitted simultaneously across non-overlapping frequency segments.
Innovation Solution
The method involves selecting and aggregating medium access control (MAC) layer data units for transmission across multiple channel segments, generating aggregate MAC and physical layer data units, and transmitting these units in overlapping time frames across non-overlapping frequency segments, utilizing integrated circuit devices and multi-segment channel access controllers to manage channel contention and data selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple channel segments are used for transmission, then throughput is improved, but managing channel contention and data acknowledgment becomes more complex
Solution Approach 1:
The communication channel is divided into multiple non-overlapping frequency segments (first channel segment, second channel segment, etc.), each operating independently. This segmentation allows simultaneous transmissions on different segments without interference, increasing overall throughput while maintaining manageable complexity through modular channel handling
Solution Approach 2:
The patent introduces frequency dimensionality by utilizing multiple non-overlapping frequency segments simultaneously. Instead of time-division multiplexing (single dimension), the system transitions to frequency-division multiplexing (another dimension), allowing parallel transmissions across different frequency bands to enhance productivity
2Productivity
If data units are transmitted simultaneously across multiple channel segments, then transmission efficiency is improved, but ensuring proper receipt and acknowledgment becomes more difficult
Solution Approach 1:
The patent implements feedback mechanisms where receiving devices send acknowledgments back to transmitting devices for data units received on each channel segment. This feedback loop ensures proper receipt confirmation across multiple simultaneous transmissions, making acknowledgment detection manageable despite parallel transmissions
Solution Approach 2:
Data units are segmented and transmitted on different channel segments independently. Each segment's transmission and acknowledgment can be tracked separately, reducing the complexity of detecting and measuring acknowledgment status across the entire multi-segment transmission
Data Source
AI summary
A first communication device selects respective sets of medium access control (MAC) layer data units for transmission via respective channel segments of a communication channel, where the first channel segment and the second channel segment are non-overlapping frequency segments of the communication channel. The first communication device generates respective aggregate MAC layer data units to include the respective sets of MAC layer data units, generates respective physical (PHY) layer data units to include the respective aggregate MAC layer data units, and transmits the respective PHY layer data units in the respective channel segments to one or more second communication devices, where transmissions of the respective aggregate MAC layer data units in the respective channel segment overlap in time.