Terminal LDPC Detection for Smart Device WLAN Access
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Solution Overview
Problem
Smart devices without LDPC coding capability fail to access a WLAN when the router uses the LDPC coding scheme, as they cannot recognize the broadcast message coded in LDPC, leading to connection failures.
Innovation Solution
A method and device that detect whether a terminal can communicate with a router through an LDPC coding-decoding scheme and, if so, cease establishing connection and broadcast WLAN information through a non-LDPC coding-decoding scheme, such as IEEE 802.11b/g, to enable access via a router.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the router uses LDPC coding scheme for wireless transmission, then the wireless transmission rate is improved, but smart devices without LDPC coding capability fail to access the WLAN
Solution Approach 1:
The patent segments the user base into two groups: smart devices with LDPC coding capability and those without. The system then provides different coding schemes to different segments - LDPC for capable devices and non-LDPC for incapable devices, allowing both segments to access the network simultaneously with optimized performance for each group
Solution Approach 2:
The terminal acts as an intermediary device that detects whether smart devices support LDPC coding and mediates the communication by selecting appropriate coding schemes. When a smart device without LDPC capability is detected, the terminal intervenes to establish communication using non-LDPC coding, thus bridging the compatibility gap between the router's LDPC capability and the smart device's limitations
2Productivity
If the terminal establishes connection with the router through LDPC coding scheme, then the wireless transmission efficiency is enhanced, but smart devices cannot recognize the broadcast message and fail to access the WLAN
Solution Approach 1:
The patent implements dynamic coding scheme selection based on real-time detection of smart device capabilities. The terminal dynamically switches between LDPC and non-LDPC coding schemes depending on whether LDPC-capable devices or non-LDPC smart devices are detected, ensuring both high transmission efficiency for capable devices and reliable access for incapable devices
Solution Approach 2:
The patent changes the coding scheme parameter based on the detected smart device capabilities. When non-LDPC smart devices are detected, the system changes from using LDPC coding to non-LDPC coding for broadcasting WLAN information, thereby maintaining parameter compatibility and ensuring reliable access for all device types
Data Source
AI summary
The present disclosure relates to a method and a device for controlling access of a smart device, which belongs to the field of wireless communication. The method includes: determining, by a terminal device, whether the smart device is able to support a Low Density Parity Check Code (LDPC) coding-decoding scheme, broadcasting, by the terminal device, information about a Wireless Local Area Network (WLAN) to the smart device through a LDPC coding-decoding scheme if it is determined that the smart device is able to support the LDPC coding-decoding scheme, detecting whether the terminal device would communicate with a router through a LDPC coding-decoding scheme when accessing a WLAN if it is determined that the smart device is not able to support the LDPC coding-decoding scheme, ceasing establishing connection with the router, and broadcasting information about the WLAN through a non-LDPC coding-decoding scheme. The information about the WLAN is used for the smart device to access the WLAN via the router. The device includes: a detecting module, a controlling module and a broadcasting module.