Call Control Node New Call Leg Association
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Solution Overview
Problem
The complexity of user experience in transitioning between services in packet-based telephony networks, such as VoLTE and 5G technologies, leads to difficulties in maintaining call continuity and quality, especially when merging or switching call legs, which is not user-friendly and often results in lower call quality compared to traditional telephony networks.
Innovation Solution
A method of operating a call control node and communications server that allows for the establishment of a new call leg to uplift an in-progress telephony call, maintaining call continuity and quality by associating the communications server with the call, thereby eliminating the need for specific call control actions from users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional methods are used to convert a two-way circuit-switched call into a three-way circuit-switched call, then the call functionality is achieved, but the user experience becomes overly complex and the process is not user-friendly
Solution Approach 1:
The patent introduces a communications server as an intermediary component that automatically manages the call leg association process. The server receives call control instructions from the call control node and handles the complex operations of establishing new call legs and associating them with existing telephony calls, thereby shielding users from complexity while achieving versatile call functionality
Solution Approach 2:
The patent segments the call control functionality into distinct components: the call control node that receives user instructions, the communications server that processes the instructions, and the call leg management subsystem that executes the actual call transformations. This segmentation allows each component to specialize in specific tasks, improving overall system efficiency and user experience
2Adaptability or versatility
If packet-based telephony technologies such as VoLTE and 5G are used, then service convergence and additional communications services are provided, but call quality may be lower than traditional telephony networks
Solution Approach 1:
The patent merges the advantages of both circuit-switched and packet-based networks by establishing a hybrid architecture. New call legs are established over packet-based networks (VoLTE/5G) for versatility, while the call control mechanism ensures that critical voice traffic maintains quality standards through proper association with telephony-optimized paths
Solution Approach 2:
The patent dynamically changes network parameters by selecting different transmission paths for different call legs. The system can adjust quality parameters such as bandwidth allocation, error correction levels, and routing preferences based on the specific requirements of each call leg and the current network conditions
3Adaptability or versatility
If specific call control actions are required in the correct order to merge or switch call legs, then the call transformation is achieved, but the process becomes complex and not simple or user-friendly
Solution Approach 1:
The communications server implements self-service automation by automatically sequencing and executing the required call control actions in the correct order. When the server receives a call control instruction, it autonomously manages the entire process of establishing new call legs, associating them with existing calls, and tearing down old legs, without requiring user intervention or complex control logic from the user device
Data Source
AI summary
A method of operating a call control node in a telecommunications network, the method comprising the steps of: establishing a telephony call between a first user and a second user; receiving a call control instruction, the call control instruction being for associating a to-be-established new call leg, between the call control node and a communications server, with the telephony call; establishing the new call leg between the call control node and the communications server; connecting the new call leg to the telephony call on the basis of the call control instruction, to make the communications server a party to the telephony call.