Wireless MAC Layer Throughput via Reduced Interframe Spacing
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Solution Overview
Problem
Wireless networks face limitations in data throughput due to the need for acknowledgement packets in multi-access channel environments, where noise and hidden station issues lead to inefficiencies, and existing burst acknowledgement techniques have plateaued, making further improvements difficult.
Innovation Solution
Implementing a method that sends a plurality of MAC data packets with a reduced interframe spacing less than the standard SIFS, allowing for a single acknowledgement packet to identify the first and last successfully received packets, which can be dynamically adjusted based on receiver capabilities and operational modes, using an 802.11-based physical layer protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard SIFS interframe spacing is used between data packets, then receiver processing reliability is maintained, but data throughput is limited
Solution Approach 1:
The patent changes the interframe spacing parameter from the standard SIFS value to a reduced value (e.g., half of SIFS). This parameter modification allows data packets to be transmitted more frequently, increasing data throughput while maintaining receiver processing reliability through the single acknowledgement mechanism.
2Reliability
If acknowledgement packets are sent for each data packet, then transmission reliability is improved, but protocol complexity and processing burden increase
Solution Approach 1:
The patent merges multiple individual acknowledgement packets into a single acknowledgement packet that confirms receipt of multiple data packets. This consolidation reduces protocol complexity and processing burden while maintaining transmission reliability by providing comprehensive acknowledgment for all received packets in the sequence.
Solution Approach 2:
The single acknowledgement packet serves multiple functions: it acknowledges receipt of multiple data packets, maintains transmission reliability, and reduces protocol overhead. This multi-functional approach eliminates the need for separate acknowledgement packets for each data packet while preserving essential reliability mechanisms.
3Productivity
If reduced interframe spacing is used, then data throughput increases, but receiver processing difficulty increases
Solution Approach 1:
The receiver uses its own transmission buffer to temporarily store and process multiple incoming data packets during the reduced interframe spacing interval. This self-service approach allows the receiver to handle the increased processing demand by utilizing its existing buffer resources, thereby managing the processing difficulty while benefiting from the increased throughput.
Data Source
AI summary
Methods, apparatuses, and systems are presented for transmitting data packets in a wireless network over a multi-access channel involving sequentially sending a plurality of medium access control (MAC) data packets from a transmitter over the multi-access channel, using a physical layer protocol based on a standard physical layer protocol having a short interframe spacing (SIFS), wherein the plurality of MAC data packets includes at least a first data packet and a second data packet separated by a reduced interframe spacing that is less than SIFS, attempting to receive the plurality of MAC data packets at a receiver using the physical layer protocol, including the first data packet and the second data packet separated by the reduced interframe spacing, and sending from the receiver a single acknowledgement packet associated with attempting to receive the plurality of MAC data packets.