Unified Missed Call Logging via IMS and Terminal Integration

The patent introduces network-based information management as an intermediary mechanism. When the terminal is out of operation, the PLMN acts as an intermediary to route calls to voice mailbox systems and store missed call information. The terminal later retrieves this stored information when it becomes operational again, enabling continuous service without requiring terminal presence for all operations.

The patent merges the logging functions of separate applications into a unified information management approach. Network-based information management consolidates both terminal-based call event logging and network message handling into a single integrated system. This unified approach enables consistent presentation of all missed call information regardless of whether the terminal was operational or not, while maintaining the functional independence of underlying systems.

The patent extends the information logging scope from a single dimension (terminal-based local logging) to multiple dimensions by incorporating network-based information management. This dimensional expansion allows the system to capture call events both when the terminal is operational (local logging) and when it is out of operation (network-based logging), achieving comprehensive call history coverage without overloading the terminal's processing capabilities.

The patent implements a universal information management framework that handles multiple types of information (call events, voice messages, terminal operational status) through a single integrated system. This multi-functional approach allows the terminal to uniformly present all types of information regardless of their source or the terminal's operational state, significantly improving user experience without requiring separate specialized handling mechanisms for each information type.