Multi-User Frame Exchange Protocols for Simultaneous Block Acknowledgments
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing uplink multiple user (MU) frame exchanges, particularly in supporting high data throughputs and bandwidth requirements, as existing protocols do not allow for simultaneous multiple block acknowledgments (BAs) in uplink and downlink MU multiple-input multiple-output (MIMO) and frequency division multiple access (FDMA) systems.
Innovation Solution
The implementation of protocol rules and efficient frame exchange sequences that enable simultaneous multiple block acknowledgments (BAs) in uplink and/or downlink MU MIMO and FDMA systems, using special subframes and reverse direction grants (RDGs) to solicit immediate responses from multiple devices, and aggregating responses in MU packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing protocols are used for uplink MU frame exchanges, then device compatibility is maintained, but data throughput and bandwidth utilization are limited
Solution Approach 1:
The patent segments the acknowledgment process by introducing separate BA request frames and BA response frames, allowing multiple BAs to be transmitted simultaneously in uplink MU-MIMO and FDMA systems. This segmentation enables parallel acknowledgment exchanges without requiring complete protocol redesign, thus improving throughput while maintaining manageable complexity.
Solution Approach 2:
The patent adds a new dimension to the frame exchange protocol by incorporating reverse direction grants (RDGs) that enable uplink transmissions in response to downlink frames. This dimensional addition allows simultaneous downlink and uplink MU operations, effectively doubling the communication efficiency without fundamentally complicating the existing protocol structure.
2Productivity
If simultaneous multiple block acknowledgments are enabled, then bandwidth utilization improves, but protocol management complexity increases
Solution Approach 1:
The patent employs preliminary action by sending BA request frames before the actual data transmission, allowing receiving devices to prepare their acknowledgment responses in advance. This preliminary solicitation of BAs ensures that acknowledgments are ready when needed, enabling seamless simultaneous MU operations without increasing real-time protocol management complexity.
Solution Approach 2:
The patent introduces RDG frames as intermediaries that coordinate between downlink and uplink transmissions. These RDG frames carry grants for uplink MU transmissions and serve as mediators that manage the simultaneous BA exchanges, simplifying protocol management by providing a structured intermediary mechanism rather than requiring direct complex device-to-device coordination.
3Productivity
If immediate response solicitation is implemented for multiple devices, then communication efficiency improves, but device coordination difficulty increases
Solution Approach 1:
The patent implements periodic action through structured frame exchange sequences where BA requests and responses occur at regular, predetermined intervals. This periodic structure creates a rhythmic communication pattern that devices can easily synchronize to, improving communication efficiency while reducing coordination difficulty through predictable, repeating exchange cycles rather than ad-hoc coordination.
Data Source
AI summary
Certain aspects of the present disclosure provide methods and apparatus for multi user bar protocols and frames. According to certain aspects, an apparatus is provided for wireless communications. The apparatus generally includes a processing system configured to determine that a plurality of devices have a first capability and generate a multi-user (MU) packet that solicits an immediate response from a plurality of the devices, wherein the immediate response comprises an acknowledgment (ACK) or block ACK (BA) and an interface configured to output the MU packet for transmission.