Wireless LAN Rate Control to Prevent Fixed Terminal Roaming
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless LAN terminals fixedly installed may perform unintended roaming due to uncontrollable radio wave intensity and communication retry status, leading to ineffective roaming control.
Innovation Solution
A communication system where wireless LAN terminals transmit information about their installation status, and access points select and transmit specific communication rates, including a maximum and minimum rate, for the terminals to use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the wireless LAN terminal uses automatic roaming control based on radio wave intensity and communication retry status, then mobile terminals can maintain stable connections, but fixed stations perform unintended roaming
Solution Approach 1:
The patent applies local quality by differentiating roaming control behavior based on terminal type. Fixed stations and mobile terminals use different roaming determination criteria - fixed stations rely primarily on communication retry status while mobile terminals use both radio wave intensity and retry status. This localized adaptation of control parameters prevents unintended roaming in fixed stations while maintaining stable connections for mobile terminals.
2Reliability
If the access point controls communication rates for all terminals, then communication stability improves, but the system complexity increases
Solution Approach 1:
The access point performs preliminary actions by proactively determining and notifying the terminal of appropriate communication rates before communication issues arise. Based on the terminal type (fixed station or mobile terminal), the access point pre-selects suitable rates from available options and notifies the terminal in advance, preventing communication instability rather than reacting to it.
3Productivity
If the wireless LAN terminal determines roaming based on radio wave intensity, then mobile terminals can switch to stronger signals, but fixed stations cannot control their roaming behavior
Solution Approach 1:
The patent implements dynamics by making the roaming determination mechanism adaptable to terminal type. The system dynamically adjusts which parameters (radio wave intensity, communication retry status) are used for roaming decisions based on whether the terminal is a fixed station or mobile terminal. This dynamic adaptation allows mobile terminals to exploit signal opportunities while preventing fixed stations from unintended roaming.
Data Source
AI summary
The present disclosure provides a communication system that prevents a wireless LAN terminal fixedly installed from performing roaming. A communication system (1) includes: a wireless LAN terminal (10) that transmits first information indicating whether or not the wireless LAN terminal is a fixed station fixedly installed; and an access point (20) that selects, when the first information indicates that the wireless LAN terminal is the fixed station, communication rates including a maximum communication rate and a minimum communication rate from among a plurality of communication rates that can be set in communication with the wireless LAN terminal (10) and transmit second information about the selected communication rates to the wireless LAN terminal (10). The wireless LAN terminal (10) attempts communication based on the communication rates included in the second information.