Modem Cell Barring for Network Recovery

The patent applies preliminary anti-action by proactively barring the current cell before the modem can repeatedly attempt connections. When abnormality is detected, the system sets the current cell as a barred cell with a configured barring duration, preventing further connection attempts to the faulty cell. This anticipatory measure stops the harmful repeated connection behavior before it can consume additional power, while still allowing the modem to search for and connect to alternative cells.

The patent implements self-service by enabling the modem to automatically detect its own abnormality state and trigger the cell barring mechanism without requiring user intervention. The system autonomously identifies when network communication fails, bars the current cell, and initiates searches for alternative cells. This automatic self-diagnosis and self-correction capability restores network communication while eliminating the need for users to manually reboot the device, significantly improving ease of operation.

The patent applies parameter changes by modifying the cell status parameter from 'accessible' to 'barred' when abnormality is detected. This simple parameter transformation fundamentally changes the cell's behavior - the barred cell is automatically excluded from search results and connection attempts. The system leverages existing cell parameters (barring duration, cell identity) and reconfigures them to control the search behavior, rather than introducing complex new management mechanisms. This approach improves network availability while keeping the implementation relatively simple.