Trigger Frame Resource Indication for Wi‑Fi 7 Channels Beyond 320 MHz
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Solution Overview
Problem
Existing communication protocols are limited in indicating resource units in channel bandwidths greater than 320 MHz, as trigger frames cannot accurately allocate resources in larger channel bandwidths.
Innovation Solution
Introduce a first field in the trigger frame to indicate the location of uplink resources on subchannels or unoccupied subcarriers, allowing for accurate allocation of resources in channel bandwidths exceeding 320 MHz by dividing channels into smaller segments and using puncturing techniques to simplify the indication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the trigger frame format is adapted to indicate resources in larger channel bandwidths (greater than 320 MHz), then the resource allocation capability is improved, but the device complexity increases due to the need for additional fields and more complex indication mechanisms
Solution Approach 1:
The patent segments the large channel bandwidth (greater than 320 MHz) into multiple subchannels, each with a manageable bandwidth (e.g., 320 MHz or 160 MHz). The trigger frame includes a first field that indicates which subchannel the uplink resource is located on, and another field that indicates the specific resource location within that subchannel. This segmentation approach enables the system to handle large bandwidths by breaking them down into smaller, more manageable units that can be indicated using existing trigger frame structures.
Solution Approach 2:
The patent introduces a hierarchical indication structure that adds a dimensional layer to resource indication. Instead of directly indicating the resource location in a single step, the system first indicates the subchannel dimension and then indicates the resource position within that subchannel. This two-dimensional indication approach (subchannel level + resource level within subchannel) allows the trigger frame to efficiently indicate resources in large bandwidths without requiring a complete redesign of the frame structure.
2Measurement precision
If the trigger frame includes detailed resource indication fields for larger bandwidths, then the measurement precision of resource location is improved, but the loss of information increases due to the larger number of bits required for indication
Solution Approach 1:
The patent divides the resource indication process into two segmented parts: first indicating the subchannel location (using a small number of bits to select from a limited number of subchannels), and then indicating the resource position within that subchannel (using existing indication fields designed for smaller bandwidths). This segmentation reduces the total bit count compared to directly indicating the resource position in the entire large bandwidth, while maintaining precise resource location specification.
Solution Approach 2:
The patent applies partial indication by only specifying the resource location within the relevant subchannel rather than providing complete information about the entire large bandwidth. The indication is partial in the sense that it focuses resources on the specific subchannel where the uplink resource is located, using the first field to identify the subchannel and then using standard indication fields for the resource position within that subchannel.
Data Source
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AI summary
This application relates to a communication method, apparatus, and system. An access point device sends a trigger frame, where a first uplink resource allocated to a first station device by using the trigger frame is located on a first channel, the first channel includes a primary 320 MHz channel and a secondary 320 MHz channel, and when a number of subcarriers occupied by the first uplink resource is less than or equal to 4×996, a first field included in the trigger frame indicates that the first uplink resource is located on the primary 320 MHz channel or the secondary 320 MHz channel. This application may be applied to a wireless local area network system that supports 802.11 series protocols such as a next-generation Wi-Fi protocol of IEEE 802.11ax like 802.11be, Wi-Fi 7, or EHT, a next generation of 802.1 The like Wi-Fi 8 or UHR, and Wi-Fi AI, and may be further applied to a UWB-based wireless personal area network system or a sensing system.