WLAN Preamble Multiplexing for Mixed Capability Stations
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless local area network (WLAN) systems face challenges in efficiently multiplexing clients with different capabilities, as resource allocation conventions for one station may not be interpretable by another station with different capabilities, leading to malfunctions, especially when stations support different bandwidths.
Innovation Solution
The system employs a method where an access point transmits a preamble with indications of multiple channel bandwidths, allowing stations to determine the location of WLAN signaling fields and allocate resources accordingly, using high efficiency signaling fields to indicate available bandwidths and schedule data transmissions without interfering with stations of different capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the access point uses a single resource allocation convention for all stations, then the system is simple to operate, but stations with different capabilities cannot be properly supported
Solution Approach 1:
The patent segments the resource allocation by creating separate resource allocation fields for different station types (HE stations and EHT stations) within the same preamble. This allows each station type to have its own dedicated resource allocation conventions while maintaining a unified transmission structure, resolving the contradiction between supporting diverse capabilities and maintaining system simplicity
Solution Approach 2:
The patent implements a universal preamble structure that serves multiple functions: it can allocate resources for both HE and EHT stations simultaneously, and can adapt to different bandwidth configurations (80 MHz, 160 MHz, 320 MHz). The single preamble format achieves multi-functionality by incorporating multiple resource allocation fields that different station types can interpret according to their capabilities
2Productivity
If the access point allocates resources for wider bandwidth stations, then throughput is improved, but stations with narrower bandwidth capabilities experience malfunctions
Solution Approach 1:
The patent applies local quality by providing different resource allocation information in different parts of the preamble针对不同站点类型。HE stations read resource allocation from HE-specific fields appropriate for their 80/160 MHz capabilities, while EHT stations read from EHT-specific fields optimized for 320 MHz operations. This localized information delivery ensures each station type receives appropriate allocation data without interference from incompatible conventions
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of multiple parallel resource allocation fields within the preamble. These intermediary fields act as translators, converting the single transmission into multiple interpretable formats that different station types can process according to their capabilities, preventing malfunctions while enabling high throughput for capable stations
3Adaptability or versatility
If the system uses different resource allocation conventions for different station types, then compatibility is improved, but the signaling overhead increases
Solution Approach 1:
The patent merges multiple resource allocation fields into a single unified preamble structure. Instead of transmitting separate preambles for HE and EHT stations, the system combines HE resource allocation fields and EHT resource allocation fields into one integrated preamble transmission, achieving compatibility across station types while minimizing redundant transmissions and optimizing signaling efficiency
Data Source
AI summary
This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for multiplexing clients in a wireless communication network. In one aspect, a wireless station (STA) receives a preamble including a first wireless local area network (WLAN) signaling field from an access point (AP). The first WLAN signaling field includes first and second indications of first and second channel bandwidths. The first channel bandwidth includes a first set of subchannels and used by the AP to communicate with a first set of stations. The second channel bandwidth may include the first set of subchannels and a second set of subchannels and used by the AP to communicate with a second set of stations. The STA may identify a location of at least one second WLAN signaling field for the STA based on the first and second indications of the first and second channel bandwidths.