Trigger Frame Spatial Reuse Signaling for HE and EHT Scheduling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The 802.11be standard faces challenges in designing a trigger frame to schedule both HE and EHT stations, as the existing methods fail to effectively address the challenges in implementing simultaneous transmission efficiency, as the existing methods fail to effectively address the challenges in implementing the existing methods fail to effectively address the challenges in effectively implement the existing methods effectively address the challenges in effectively implement the existing methods effectively address the existing methods effectively solve the existing technologies effectively solve the existing technologies effectively address the existing technologies effectively address the existing technologies.
Innovation Solution
The method involves setting a common information field in a trigger frame to indicate a spatial reuse parameter in a trigger frame to schedule an EHT station, or schedule both an HE station and an EHT station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a trigger frame is designed to schedule both HE and EHT stations using the same spatial reuse parameter field, then device complexity is reduced and backward compatibility is maintained, but the precision of spatial reuse parameter indication deteriorates because HE stations expect 4 SRP fields while EHT stations require a different structure with SRP1 and SRP2 fields
Solution Approach 1:
The patent applies dynamics by making the trigger frame structure adaptable based on the station type. The AP can dynamically select between two configurations: one with four UL SRP fields for HE stations, and another with UL SRP1/SRP2 fields for EHT stations. This dynamic structuring allows the same trigger frame format to serve multiple purposes with different precision requirements, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The patent applies local quality by providing different spatial reuse parameter structures in different contexts. Within the trigger frame, specific fields (UL SRP1, UL SRP2) are designed with EHT-specific characteristics when scheduling EHT stations, while maintaining compatibility with HE station requirements when needed. This localized adaptation of field structure allows precise parameter indication for each station type without increasing overall system complexity.
2Measurement precision
If separate trigger frame structures are designed for HE and EHT stations, then spatial reuse parameter indication precision is improved for each station type, but device complexity increases and backward compatibility is compromised
Solution Approach 1:
The patent applies universality by designing a trigger frame that can serve multiple functions: it can schedule both HE and EHT stations using the same basic structure. The frame includes fields that are universally applicable (common information field, user information fields) while allowing EHT-specific extensions (UL SRP1, UL SRP2 fields). This multi-functional design achieves precise parameter indication for different station types without requiring completely separate frame structures.
Solution Approach 2:
The patent applies the nested doll principle by embedding EHT-specific fields within the existing HE trigger frame structure. The UL SRP1 and UL SRP2 fields are nested within the user information field structure, allowing EHT stations to extract precise spatial reuse parameters while HE stations can ignore these additional fields and use the standard UL SRP fields. This nesting achieves precision for EHT without increasing overall complexity.
3Ease of operation
If a trigger frame uses a unified spatial reuse parameter field for both HE and EHT stations, then ease of operation is improved, but adaptability deteriorates because the frame cannot effectively support the different spatial reuse requirements of EHT stations
Solution Approach 1:
The patent applies segmentation by dividing the spatial reuse parameter fields into distinct segments: UL SRP fields for HE stations and UL SRP1/SRP2 fields for EHT stations. This segmentation allows each station type to access the specific parameter structure it requires while maintaining a unified trigger frame operation. The segmented field structure provides adaptability without complicating the overall scheduling operation.
Solution Approach 2:
The patent applies the intermediary principle by using the common information field and user information field structure as intermediaries between HE and EHT requirements. These intermediary fields can carry both HE-compatible UL SRP information and EHT-specific UL SRP1/SRP2 information, allowing the trigger frame to adapt to different station types while maintaining ease of operation through a unified scheduling mechanism.
Data Source
Figure 1~2b
Figure 3a~3b
Figure 4
AI summary
This application relates to the wireless communication field, and is applied to a wireless local area network that supports the 802.11be standard. In particular, this application relates to a method for indicating a spatial parameter in a trigger frame and a corresponding method for determining a spatial reuse parameter field in a PPDU, and a related apparatus. The method includes: An access point AP sends a trigger frame, where the trigger frame is used for triggering a station to send an extremely high throughput trigger based physical layer protocol data unit EHT TB PPDU. The station determines, based on one or two of a value indicated by an uplink EHT spatial reuse parameter UL EHT SRP and a value indicated by one or more uplink spatial reuse parameter UL SRP fields in a common information field of the trigger frame, a value indicated by a spatial reuse parameter SRP in a universal signal field U-SIG of the EHT TB PPDU. The STA sends the EHT TB PPDU to the AP. During implementation of this embodiment of this application, the spatial reuse parameter field of the EHT TB PPDU may be set without changing a frame structure of the U-SIG.