Seamless Half-Duplex to Full-Duplex Session Switching
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Solution Overview
Problem
Existing wireless communication systems require users to terminate half-duplex calls and initiate new full-duplex calls when users want to switch from half-duplex to full-duplex mode, disrupting ongoing communications.
Innovation Solution
A system and method that allow seamless switching from half-duplex to full-duplex mode by using a network with a dispatch call controller, VoIP server, and service broker to manage the transition, enabling users to switch between modes without terminating the current call, by receiving and processing requests for mode changes while ensuring subscribers have subscribed to the necessary service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If users terminate the current half-duplex call to initiate a new full-duplex call, then the communication mode can be changed, but the ongoing communication is disrupted and time is lost
Solution Approach 1:
The system performs preliminary actions by establishing the full-duplex call resources in advance while the half-duplex call is still active. The network controller sets up the full-duplex call parameters and resources before the mode switch occurs, so that when the user initiates a mode change, the full-duplex call is already prepared and can be activated immediately without termination and re-establishment delays
Solution Approach 2:
The invention maintains continuity of useful action by allowing the communication session to continue uninterrupted during the mode transition. The system overlays the full-duplex call parameters on the existing half-duplex session, ensuring that the communication flow continues without gaps, terminations, or re-establishment, thus eliminating time loss while changing communication modes
2Adaptability or versatility
If users terminate the current half-duplex call to initiate a new full-duplex call, then the communication mode can be changed, but the communication process becomes complex and inconvenient
Solution Approach 1:
The system implements self-service by automatically handling the entire mode switching process without requiring user intervention for manual termination and re-establishment. The network controller detects the mode change request, automatically sets up the full-duplex call parameters, manages the transition, and maintains the session continuity, making the complex switching process transparent and convenient for the user
Solution Approach 2:
The network controller is designed with multi-functionality to handle both half-duplex and full-duplex call modes within a single unified system. It can manage half-duplex calls, receive mode change requests, establish full-duplex calls, and perform the transition all through one controller interface, eliminating the need for separate processes and simplifying user operation
Data Source
AI summary
A communication system that is particularly suited to switch a half duplex session to a full duplex session. The system includes a dispatch call controller that sets up a half duplex session; and a VoIP server that receives a request to switch the half duplex session to a full duplex session; forwards the request to the target subscriber unit; receives an acceptance of the request; and sets up the full duplex session between the subscriber units. In another embodiment, the dispatch call controller receives the request to switch to the full duplex session; forwards the request to the target subscriber unit; receives an acceptance of the request; and instructs the VoIP server to set up the full duplex session. In yet another embodiment, a service broker receives the request, instructs the VoIP server to set up the full duplex session, and instructs the dispatch call controller to terminate the half duplex session.