Shared PPDU Frame Structure for Dense Wireless Throughput
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Solution Overview
Problem
Conventional communication systems face challenges in increasing data throughput in dense deployments of wireless communication devices, where significant control-based signaling is required to ensure proper data transmission and processing, competing with limited resources and failing to meet the demands of numerous operational devices and increasing data volumes.
Innovation Solution
The implementation of novel architectures and methods that allow for improved spatial reuse in next-generation WiFi and WLAN systems, utilizing processors to generate and process frames with integrated preambles and sub-preambles that specify coding parameters for multiple recipient devices, enabling efficient data transmission and reducing overhead through shared PPDU protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional communication systems use separate frames for each user with individual preambles, then each user can be properly addressed and controlled, but the signaling overhead increases and data throughput decreases in dense deployments
Solution Approach 1:
The patent merges multiple individual user frames into a single shared PPDU structure that can carry data for multiple users simultaneously. Multiple users share a common preamble and frame structure, eliminating the need for separate preambles and control signaling for each user. This combining approach directly reduces signaling overhead and increases data throughput in dense deployments.
Solution Approach 2:
The shared PPDU structure is designed to serve multiple functions: it can address multiple users, carry different data streams, and maintain individual user identification all within a single frame. The universal frame structure replaces multiple specialized individual frames, reducing overall signaling requirements while maintaining the ability to properly address and control each user.
2Ease of operation
If multiple users are served with individual frames, then user-specific control is maintained, but the number of frames increases leading to reduced efficiency in high-density environments
Solution Approach 1:
The patent combines multiple user data streams and their associated control information into a single shared PPDU transmission. By merging the frame structures, the system reduces the total transmission time required to serve multiple users while maintaining the ability to provide user-specific control through included user identification fields and individual data portions within the shared frame.
3Reliability
If separate preambles are used for each user frame, then coding parameters can be specified for each user, but the signaling overhead increases competing for limited resources
Solution Approach 1:
The patent merges the preamble functionality to serve multiple users simultaneously. A single shared preamble contains coding parameters that can be applied to multiple user data portions within the same PPDU. This approach maintains reliable data reception for each user while significantly reducing the quantity of signaling resources consumed compared to using separate preambles for each user.
Solution Approach 2:
The shared preamble is designed with universal functionality to specify coding parameters for multiple users within a single structure. The preamble serves all users in the PPDU, eliminating the need for redundant per-user preambles and freeing up transmission resources for actual data payload while maintaining proper data reception reliability.
Data Source
AI summary
A wireless communication device is configured to generate frames based on any of a number of different frame formats for transmission to one or more other recipient wireless communication devices. The frame may be implemented to include data intended for two or more recipient devices. The device encodes first data intended for a first recipient device using first one or more coding parameters and encodes second data intended for a second recipient device using second one or more coding parameters. The manner by which the first and second data have been encoded is indicated within one or more other fields within the frames based on the selected frame format. In one example, a single preamble specifies the first and second one or more coding parameters. In another example, an initial preamble and one or more respective sub-preambles specify the first and second one or more coding parameters.