Trigger Frame Configuration for WLAN Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional trigger frame techniques in wireless local area networks (WLANs) suffer from high overhead due to redundant data and inefficient information signaling, leading to increased power consumption and resource wastage in STAs, particularly when dealing with multiple user resource unit allocations and punctured channels.
Innovation Solution
The proposed solution involves configuring a single per-user information field to carry redundant information only once across multiple random access resource units and signaling whether resources are single user or multi-user allocations, while also including BSS color information in trigger frames to prevent unnecessary decoding and resource wastage, and utilizing punctured channels for efficient bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional trigger frame techniques are used to schedule uplink traffic from multiple STAs, then traffic collisions are reduced, but overhead increases due to redundant information for each STA separately
Solution Approach 1:
The patent merges the per-user information fields for multiple STAs into a single shared field. Instead of repeating STA-specific information (such as resource unit allocation, modulation and coding scheme, and spatial reuse parameters) for each individual STA, the invention uses one unified field that contains information applicable to all STAs. This significantly reduces the trigger frame overhead while maintaining the ability to schedule uplink traffic from multiple STAs efficiently.
Solution Approach 2:
The per-user information field is designed to serve multiple STAs simultaneously rather than being dedicated to a single STA. The field contains universal parameters (resource unit allocation, MCS, spatial reuse) that can be applied across multiple STAs, making the trigger frame structure more versatile and efficient for multi-user scenarios without requiring separate dedicated fields for each user.
2Loss of information
If STAs decode the entire trigger frame to determine resource allocation, then complete information is obtained, but power consumption increases due to inefficient decoding
Solution Approach 1:
The trigger frame is segmented into distinct fields with different levels of detail: a common information field that contains STA-specific identifiers (AID) and a shared per-user information field that contains universal parameters. STAs can first quickly identify relevant entries in the common field and then only decode the necessary portions of the per-user field, rather than processing the entire frame. This segmentation enables more efficient energy-aware decoding.
Solution Approach 2:
Different portions of the trigger frame have different levels of detail tailored to their function. The common information field provides minimal identifying information for each STA, while the per-user information field provides detailed parameters only when needed. This local quality differentiation allows STAs to process only the essential information required for their specific resource allocation, reducing unnecessary power consumption.
Data Source
Figure 1
Figure 2
Figure 3A
AI summary
The present disclosure provides various aspects related to techniques for generating trigger frames, at an access point (AP), that reduce the overhead associated with triggering an uplink transmission from the wireless station (STA). Features of the present disclosure achieve this by, for example, utilizing a single per-user information field of the trigger to signal a plurality of random access resource units that may be allocated to the one or more STAs in the network. Such a technique is an improvement over the conventional system that require each random access resource unit to be signaled separately in a separate per-user information field (thus increasing the overhead). Additionally, aspects of the present disclosure allow the AP to effectively signal to the STA whether the one or more resources allocated to the at least one STA are a single user resource unit allocation or a multi-user resource unit allocation.