Call Connection State Verification in Communication Systems
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Solution Overview
Problem
In conventional communication systems, when terminals attempt to connect calls simultaneously or when a call is in progress, they often receive incorrect busy state information, leading to failed call connections and disruptions.
Innovation Solution
A method and apparatus that determine whether terminals are requesting call connections to each other, select one terminal, reject its call connection request, and connect the call through the other terminal, while also providing state information to third terminals about ongoing call connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If terminals transmit call connection request messages to each other simultaneously, then both terminals can attempt to establish calls, but they receive incorrect busy messages indicating call failure
Solution Approach 1:
The exchange performs preliminary actions by determining whether terminals are in a call connecting state before processing call connection requests. When simultaneous requests are detected, the exchange proactively selects one terminal and rejects the other's request, preventing the busy message error from occurring in the first place
Solution Approach 2:
The exchange implements feedback by monitoring the call connecting state of terminals and using this information to make intelligent decisions about call connection requests. The exchange feedback mechanism allows it to recognize simultaneous requests and adjust its handling accordingly, selecting one terminal and rejecting the other to avoid erroneous busy messages
2Speed
If the exchange processes all call connection requests without state verification, then call connection attempts are made quickly, but incorrect busy state information is transmitted to terminals
Solution Approach 1:
The exchange performs preliminary verification of terminal call connecting states before processing call connection requests. This preliminary check ensures that accurate state information is available before making connection decisions, preventing incorrect busy messages while maintaining efficient processing
Solution Approach 2:
The exchange uses feedback from terminal state monitoring to accurately determine whether terminals are in call connecting states. This feedback mechanism ensures that the exchange transmits correct state information to terminals, improving measurement precision without significantly impacting processing speed
Data Source
AI summary
A call connection method and apparatus in a communication system are provided, in which a call connection request message is received from each of first and second terminals, it is determined whether the first and second terminals are requesting a call connection to each other, one of the first and second terminals is selected if the first and second terminals are requesting a call connection to each other, the call connection request of the selected terminal is rejected, and a call is connected between the first and second terminals by performing a call connection to the selected terminal according to the call connection request of the non-selected terminal.