WLAN Router LDPC Negotiation for Legacy Device Access
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Solution Overview
Problem
Smart devices without Low Density Parity Check Code (LDPC) coding capability face challenges in accessing Wireless Local Area Networks (WLANs) due to their inability to recognize and decode LDPC-coded broadcast messages, leading to connectivity failures.
Innovation Solution
A method and device that detect whether a smart device would communicate with a router through an LDPC coding-decoding scheme and negotiate to switch to a non-LDPC scheme, such as 802.11n to 802.11b/g, allowing the device to establish a connection and receive WLAN information broadcasted in a non-LDPC format, enabling access to the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the router uses LDPC coding scheme for communication, then wireless transmission efficiency is improved, but smart devices without LDPC capability cannot access the WLAN
Solution Approach 1:
The router dynamically switches between LDPC and non-LDPC coding schemes based on the capabilities of connecting devices. When a smart device without LDPC capability connects, the router negotiates and switches to a non-LDPC scheme, ensuring compatibility while maintaining high efficiency for LDPC-capable devices
Solution Approach 2:
The coding scheme parameter is changed from LDPC to non-LDPC based on device capability detection. The system detects whether the smart device supports LDPC and adjusts the coding parameter accordingly, enabling both LDPC-capable and non-LDPC devices to access the network
2Speed
If the router broadcasts WLAN information through LDPC coding scheme, then transmission rate is enhanced, but smart devices cannot recognize and decode the broadcast messages
Solution Approach 1:
The coding scheme parameter for broadcast messages is changed from LDPC to non-LDPC when smart devices are detected. This ensures that broadcast messages can be recognized and decoded by devices without LDPC capability while maintaining high transmission rates for LDPC-capable devices
Data Source
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AI summary
The present disclosure relates to a method and a device for controlling access, which belongs to the field of wireless communication. The method includes: detecting (S11, S31, S51) whether the terminal would communicate with a router through a Low Density Parity Check Code LDPC coding-decoding scheme when access to a Wireless Local Area Network WLAN is requested; upon determining that the terminal would communicate with the router through the LDPC coding-decoding scheme, establishing (S12, S52) connection with the router; and notifying (S13, S34, S53) the router to broadcast information about the WLAN through a non-LDPC coding-decoding scheme, the information about the WLAN being used for a smart device to access the WLAN via the router. The device includes a detecting module (121), a connecting module (122) and a notifying module (123).