Circuit Bearer Multimedia Service Delivery via SIP Signaling
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Solution Overview
Problem
Telecommunications systems, such as UMTS wireless networks, face challenges in providing quality of service (QoS) for IP-based, real-time multimedia services due to the need for substantial upgrades in access and packet core subsystems, which is time-consuming and costly.
Innovation Solution
Establishing a packet signaling connection and a circuit bearer connection between a terminal and the network, allowing signaling information to be transferred via packet signaling and data via circuit bearer, even if the network does not support the required QoS, ensuring efficient delivery of multimedia services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If packet-based network is used to deliver multimedia services, then service delivery framework is provided, but quality of service mechanisms require substantial network upgrades
Solution Approach 1:
The patent segments the service delivery into two independent parts: packet-based signaling for control and circuit-based bearer for data transport. This allows the signaling framework to be upgraded to packet-based standards while the data transport can remain on the existing circuit-based infrastructure, avoiding comprehensive network upgrades.
Solution Approach 2:
The patent introduces a gateway as an intermediary that bridges the packet-based signaling domain and the circuit-based data domain. The gateway performs protocol conversion and coordination, enabling multimedia services to be delivered using packet signaling while data flows through circuit bearers, thus avoiding the need to upgrade the entire network to packet-based QoS mechanisms.
2Reliability
If circuit bearer is used to carry multimedia data, then quality of service is ensured, but network efficiency is reduced compared to packet switching
Solution Approach 1:
The patent applies different transmission qualities to different parts of the service delivery: packet-based signaling for control plane and circuit-based bearer for user plane data. This local differentiation allows QoS to be ensured where needed (data transport) while maintaining efficiency in the control plane, optimizing the overall system performance.
3Adaptability or versatility
If packet signaling connection is established for IMS services, then standard compliance is achieved, but network QoS functionality is insufficient
Solution Approach 1:
The patent separates the signaling plane from the data plane, allowing the signaling plane to be upgraded to packet-based IMS standards while the data plane continues to use circuit-based bearers with proven QoS capabilities. This segmentation enables standard compliance without sacrificing QoS functionality.
Solution Approach 2:
The gateway acts as an intermediary that connects the packet-based IMS signaling infrastructure with the circuit-based data infrastructure. It enables standard-compliant packet signaling while ensuring reliable QoS through circuit bearers, resolving the contradiction between standard compliance and QoS functionality.
Data Source
AI summary
A packet-based multimedia service is provided to a terminal in a network. A packet signaling connection is established between the terminal and the network. Signaling information for the multimedia service is transferred via the packet signaling connection using Session Initiation Protocol (SIP) or a similar protocol. A circuit bearer connection is also established with the terminal. Data for the multimedia service is transferred via the circuit bearer connection. This allows the data to be carried across networks which do not support the required QoS functionality for the packet-based service, or which cannot efficiently carry packet-based data. The circuit bearer connection can be established by a network entity or by the terminal. The circuit bearer can be interworked to a packet-switched bearer at some point in the network, such as at a gateway, so as to provide a remote party with the appearance that a fully packet-switched connection is being used.