Passive Packet Switched Domain Activation via DTMF
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Solution Overview
Problem
Current solutions for deploying packet switched (PS) domain services require all participating terminals to activate the PS domain upon powering on, which is not feasible for all users, leading to poor user experience and inefficient service deployment.
Innovation Solution
A method where a first terminal generates a dual tone multi-frequency message to instruct a second terminal to activate the PS domain, with the mobile switching center acting as an intermediary to encapsulate and send the activation request, allowing the second terminal to activate the PS domain passively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all terminals are required to activate the PS domain upon powering on, then PS domain based services can be deployed, but user experience deteriorates due to forced activation
Solution Approach 1:
The terminal automatically activates the PS domain based on service requirements without requiring user intervention. The system detects when PS services are needed and autonomously performs activation, combining forced activation reliability with user experience by making the process transparent to the user.
Solution Approach 2:
The terminal activates the PS domain in advance before the user actually needs the service. By proactively activating the PS domain when the terminal is powered on or when service conditions are met, the system ensures service availability while the user remains unaware of the activation process.
2Productivity
If the service initiator activates the PS domain on its own initiative, then the initiator can deploy services, but the opposite terminal cannot be ensured to have activated the PS domain
Solution Approach 1:
The system implements a feedback mechanism where the service initiator checks whether the opposite terminal has activated the PS domain. If not, the initiator sends a DTMF instruction to trigger activation at the opposite terminal, ensuring both ends are ready for service transmission.
Solution Approach 2:
The DTMF message acts as an intermediary signal between the service initiator and the opposite terminal. The mobile switching center mediates the transmission of the activation instruction, enabling coordinated activation without direct terminal-to-terminal communication.
3Ease of operation
If the terminal activates the PS domain passively through DTMF instruction, then user experience improves, but service deployment complexity increases
Solution Approach 1:
The mobile switching center is enhanced to perform multiple functions: traditional call switching plus PS domain activation management. By making the switching center multi-functional, the patent avoids adding complex activation logic to individual terminals while still enabling passive activation capability.
Solution Approach 2:
The mobile switching center serves as an intermediary that simplifies terminal complexity. Instead of making terminals complex with activation management logic, the switching center handles the complexity of coordinating activation instructions and responses, keeping terminals simple.
Data Source
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AI summary
The present invention provides a method, terminal and network devices for changing the status of a packet switched domain. The method includes: receiving an instruction, for changing the status of a packet switched domain, sent from a first terminal, wherein the changing of the status of the packet switched domain includes activating the packet switched domain or modifying a parameter of the packet switched domain where a second terminal is currently located; and changing the status of the packet switched domain according to the instruction. With the technical solution according to embodiments of the present invention, the terminal can activate the PS domain passively to deploy PS domain based service.