Trigger Frame User Info Field for Multi-Standard Uplink Coordination
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently supporting trigger frames and wireless communication terminals, particularly in high-density environments where multiple standards and formats of physical layer protocol data units (PPDUs) are used.
Innovation Solution
The proposed solution involves an access point (AP) and a non-AP station that include transceivers and processors. The processor configures the transceiver to transmit a trigger frame with a User Info field addressing a non-AP station, and receives a trigger-based (TB) PPDU based on the User Info field. The AID12 subfield of the User Info field is used to indicate resource units (RUs) allocated or unallocated to non-AP stations, with specific configurations for high efficiency (HE) and extremely high throughput (EHT) variants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple wireless communication standards (802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad) are supported to provide diverse communication services, then communication speed and adaptability are improved, but system complexity and difficulty of managing multiple standards increase
Solution Approach 1:
The patent implements a universal trigger frame structure that can accommodate multiple wireless communication standards (802.11ax, 802.11ac, 802.11n, etc.) through a unified format. The trigger frame includes standardized fields such as Common Info, User Info List, and padding that can be interpreted by terminals supporting different standards, enabling one system to serve multiple functions across various wireless protocols without requiring separate trigger frame designs for each standard.
2Productivity
If trigger frames are used to enable uplink multi-user transmissions in high-density environments, then communication efficiency and throughput are improved, but the complexity of managing resource units and terminal responses increases
Solution Approach 1:
The patent segments the trigger frame into distinct functional fields: Common Info (containing RU allocation, UL bandwidth, MCS, etc.), User Info List (containing per-terminal information such as AID, RU allocation, power control), and padding. This segmentation allows the access point to manage resource units and terminal responses in an organized manner, reducing management complexity while maintaining high communication efficiency in dense environments.
Solution Approach 2:
The trigger frame acts as an intermediary mechanism between the access point and multiple terminals. It carries all necessary control information (resource unit allocation, modulation and coding scheme, power control commands) in a standardized format that terminals can interpret and respond to uniformly, simplifying the coordination of uplink multi-user transmissions without requiring complex direct terminal-to-terminal or terminal-to-AP negotiations.
3Productivity
If resource units are allocated to multiple non-AP stations for simultaneous uplink transmission, then throughput is improved, but the precision of resource allocation and conflict avoidance becomes more difficult
Solution Approach 1:
The patent applies local quality by providing differentiated resource unit allocations to different terminals within the User Info List. Each terminal receives specific parameters including its assigned RU, AID, MCS index, and power control commands tailored to its channel conditions and service requirements. This localized customization within the unified trigger frame structure enables precise resource allocation to multiple terminals simultaneously, maximizing throughput while avoiding conflicts through dedicated RU assignments for each terminal.
Data Source
AI summary
An access point (AP) which wirelessly communicates with a non-AP station is disclosed. The AP comprises a transceiver and a processor. The processor uses the transceiver to transmit a trigger frame including a User Info field indicating (addressing) the non-AP station and to receive a trigger-based (TB) physical layer protocol data unit (PPDU) from the non-AP station. The TB PPDU is transmitted on the basis of the User Info field of the trigger frame.