Trigger Information Exchange in Wireless Systems
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Solution Overview
Problem
Current wireless data communication systems, particularly in IEEE 802.11 WLAN systems, face inefficiencies in the upstream direction due to overheads associated with trigger frames, which limit channel capacity and data throughput during high-bandwidth exchanges.
Innovation Solution
Integrating trigger information into downlink data units, allowing clients to synchronize and transmit uplink data units with overlapping timing, thereby reducing the need for separate trigger frames and associated overheads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate trigger frames are transmitted to enable upstream OFDMA transmissions, then clients can synchronize and transmit uplink data units with overlapping timing, but overhead increases and channel capacity decreases
Solution Approach 1:
The patent combines trigger information with downlink data units by embedding trigger fields within the downlink frame structure. This merging eliminates the need for separate trigger frames, reducing overhead while maintaining the ability to synchronize upstream OFDMA transmissions from multiple clients.
Solution Approach 2:
The downlink data units serve dual functions: delivering downlink data to clients and simultaneously conveying trigger information for upstream transmissions. This multi-functionality reduces the total number of frames required and improves channel utilization by eliminating dedicated trigger frame overhead.
2Productivity
If separate trigger frames are used for upstream transmissions, then clients receive synchronization information, but transmission delays increase due to additional frame exchanges
Solution Approach 1:
By merging trigger information into downlink data units, the patent eliminates the time required for separate trigger frame transmission and processing. Clients receive both downlink data and upstream transmission triggers in a single frame, reducing overall transmission delay and improving channel utilization.
Solution Approach 2:
The trigger information is embedded in advance within the downlink data units, allowing clients to prepare for upstream transmissions before receiving the actual trigger frame. This preliminary action reduces waiting time and enables faster upstream response.
3Productivity
If trigger frames are transmitted separately, then upstream OFDMA operations can be controlled, but device complexity increases due to additional frame processing
Solution Approach 1:
The patent merges trigger processing with existing downlink frame processing logic. By embedding trigger fields within standard downlink data units, the system leverages existing processing pipelines without requiring separate trigger frame handling, thus reducing device complexity while maintaining upstream control.
Solution Approach 2:
The downlink data unit processing mechanism is enhanced to simultaneously handle data delivery and trigger interpretation. This universal processing approach eliminates the need for separate trigger frame processing paths, reducing overall device complexity while preserving upstream OFDMA control capabilities.
Data Source
AI summary
Systems and methods are disclosed herein to provide efficient support for the exchange of trigger information between wireless data communication devices and systems, including Multi-User Multiple Input Multiple Output (MU-MIMO) devices and systems that may utilize Orthogonal Frequency Division Multiple Access (OFDMA). In accordance with one or more embodiments, a trigger information exchange mechanism is disclosed that transfers trigger data as part of a pre-existing data frame handshake. Such a system may offer improved capabilities such as a reduced channel overhead incurred due to the trigger information exchange.