Multi-Band MAC Block Acknowledgment for Aggregated Wi-Fi Streams
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Solution Overview
Problem
Current IEEE 802.11 communication devices are limited to single-band operations, which hinder the full realization of throughput gains from multi-band aggregation, particularly in high-definition video streaming, and lack efficient multi-band Traffic Stream (TS) and Block Acknowledgment (BA) mechanisms.
Innovation Solution
Implementing multi-band TS and BA mechanisms that operate across multiple frequency bands, enabling simultaneous data transmission and acknowledgment across 2.4 GHz, 5 GHz, and 6 GHz bands, with unified MAC layers managing band selection and retransmissions for improved throughput.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-band operation is implemented to increase throughput, then data transmission capacity is improved, but device complexity increases due to the need for multiple transceivers and unified MAC layer management
Solution Approach 1:
The patent merges multiple single-band operations into a unified multi-band operation by implementing a unified MAC layer that manages traffic streams across 2.4 GHz, 5 GHz, and 6 GHz bands simultaneously. This consolidation allows the device to aggregate throughput from multiple bands while presenting a unified interface to the upper layers, effectively resolving the contradiction between increased capacity and complexity.
Solution Approach 2:
The unified MAC layer implemented in the patent serves multiple functions: it manages admission control, block acknowledgment, and traffic stream operations across different frequency bands. This multi-functional design eliminates the need for separate MAC layers for each band, reducing overall device complexity while maintaining high throughput capabilities.
2Productivity
If block acknowledgment is aggregated across multiple bands, then acknowledgment efficiency is improved, but the coordination complexity between bands increases
Solution Approach 1:
The unified MAC layer acts as an intermediary that coordinates block acknowledgment across multiple bands. It receives block acknowledgment requests on any band, aggregates the acknowledgment bitmaps from all active bands, and transmits the consolidated acknowledgment. This intermediary function simplifies the coordination complexity by centralizing the aggregation logic in the unified MAC layer.
3Reliability
If traffic stream setup is performed for each band separately, then band-specific optimization is achieved, but setup time and overhead increase
Solution Approach 1:
The unified MAC layer performs preliminary action by maintaining a centralized data structure that tracks active traffic streams across all bands before actual data transmission begins. When a traffic stream is established on one band, the unified MAC layer pre-configures the necessary parameters and bitmaps for all bands, enabling rapid activation of multi-band operations without repeated setup procedures.
Data Source
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AI summary
Communication devices and methods for multi-band traffic streams are provided. One exemplary embodiment provides a multi-band communication device which includes at least a plurality of transceivers and Media Access Control (MAC) circuitry. In operation, the transceivers each transmit signal frames on different ones of a plurality of frequency bands. The MAC circuitry is coupled to the transceivers and, in operation, receives a multi-band block acknowledgement frame on one of the plurality of frequency bands acknowledging the signal frames transmitted on the plurality of frequency bands. Another exemplary embodiment provides MAC circuitry which in operation generates and transmits a multi-band block acknowledgement frame on one of the plurality of frequency bands acknowledging the signal frames received on the plurality of frequency bands.