Call Holding Mixed Media Types CS IP Segmentation
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Solution Overview
Problem
Existing call holding methods under IMS Centralized Service are limited to scenarios with two voice calls or two video calls, and cannot effectively manage calls of different media types, as they require different CS media connections.
Innovation Solution
A method and device that allow a UE to perform a first call with a second UE through a CS access call leg supporting a first media type, and initiate a second call with a third UE through a second CS access call leg supporting a second media type, using IMS CS Control Channel (ICCC) requests to change the media type and establish a new media connection, enabling the holding of calls with different media types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the existing call holding method under IMS Centralized Service is used, then two voice calls or two video calls can be held, but calls of different media types cannot be managed effectively
Solution Approach 1:
The patent segments the media connection management by introducing separate handling mechanisms for different media types. The CS media connection is separated from the IP media connection, allowing independent management of voice and video streams. This segmentation enables the system to handle mixed media types by treating each media connection type separately rather than as a unified resource.
Solution Approach 2:
The patent implements multi-functionality by enabling the CS access call leg to support multiple media types (voice and video) simultaneously. The system can now handle both CS domain media connections and IP domain media connections through the same call leg, making it universal enough to manage mixed media type calls without requiring separate dedicated paths for each type.
2Reliability
If different CS media connections are required for different media types, then calls of different media types can be distinguished, but the call holding process becomes complex and requires separate connection management
Solution Approach 1:
The patent merges the management of CS media connections and IP media connections into a unified call holding process. Instead of requiring separate connection management procedures for different media types, the system combines them under a single call leg framework, reducing management overhead while maintaining the ability to distinguish and handle different media types appropriately.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of the ICCF (IMS CS Control Function) that mediates between the UE and the media connections. The ICCF handles the complexity of managing different media types by acting as an intermediary that translates and coordinates between CS domain and IP domain requirements, simplifying the overall management process.
3Productivity
If the CS media connection is reused for different calls, then resource utilization improves, but the ability to support different media types is lost
Solution Approach 1:
The patent adds another dimension to media connection management by introducing the IP media connection layer alongside the traditional CS media connection. This dimensional addition allows the system to reuse CS media connections for resource efficiency while simultaneously supporting multiple media types through the IP connection layer, effectively resolving the trade-off between resource utilization and media type versatility.
Data Source
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AI summary
A method and a device for holding calls are provided herein. The method includes: The first UE performs the first call with the second UE through the first CS access call leg, holds the first call according to an ICCC request, sets up a second call with the third UE according to an ICCC request, and performs the second call with the third UE through the second CS access call leg. Through the method and the UE for holding calls in an embodiment of the present invention, while a first call is underway between the UE and a second UE through a first CS access call leg, the UE performs a second call with a third UE through a second CS access call leg, and the media type supported by the first CS access call leg is different from the media type supported by the second CS access call leg. In this way, two calls of different media types can be held.