Multimedia CLI Server Using SIP MESSAGE for Rich Caller ID
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Solution Overview
Problem
The existing Calling Line Identification (CLI) service in mobile networks is limited, only providing text-based caller information, failing to leverage the capabilities of IP Multimedia Subsystem (IMS) platforms for delivering multimedia content during call setups, which limits user experience and service potential.
Innovation Solution
A method and architecture that utilizes SIP MESSAGE requests to send and receive multimedia content, such as pictures, audio, and video, associated with caller identities, enabling pre-customized business cards to be displayed on callee devices during call setups, enhancing the CLI service with multimedia capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional CLI service is used, then network complexity is low, but information richness is limited to text only
Solution Approach 1:
The patent combines the traditional CLI service with IMS multimedia capabilities by integrating SIP MESSAGE requests into the existing CLI framework. This merging allows text-based caller identification to be enriched with multimedia content (business cards) while leveraging the existing IMS infrastructure, thus increasing information richness without proportionally increasing network complexity
Solution Approach 2:
The SIP MESSAGE mechanism is used for multiple purposes: it carries both traditional CLI text information and multimedia business card content. This multi-functionality allows a single protocol to handle both simple text identification and rich multimedia delivery, reducing the need for separate dedicated systems
2Ease of operation
If multimedia content is delivered during call setup, then user experience is improved, but data transmission requirements increase
Solution Approach 1:
Business cards are pre-customized and stored on the network server before call setup. When a call is initiated, the caller's business card is immediately retrieved and delivered to the callee without requiring real-time generation or processing, thus improving user experience while minimizing data transmission requirements
Solution Approach 2:
Instead of transmitting large multimedia files during each call setup, the system transmits a lightweight SIP MESSAGE containing caller identification information and business card data. The actual multimedia content is referenced or delivered efficiently through the IMS data bearer, reducing the data transmission burden during call establishment
Data Source
AI summary
An improved Calling Line Identification (CLI) service is implemented inside a cellular telephony network connected to the IMS platform for delivering IP-based multimedia services to the end users. The new architecture is based on a multimedia CLI-dedicated server (MM-CLI) connected to the IMS and the packet switched (PS) domain of the core network. The MM-CLI comprises: a Control server, media storage, and a web interface. The control server is devoted to handle the SIP signalizing flow including a SIP element called MESSAGE carrying in its body either the multimedia contents of the so-called business card or HTTP address link to retrieve the components of said multimedia contents. The media storage stores multimedia contents of the business cards and/or said HTTP address links according to respective user's profiles. The web interface web allows the end users to download the multimedia components of the business cards through the addressed HTTP links. The handsets include a client application for monitoring the line status of the caller and transmitting the SIP MESSAGE at the very initial instant of the call setup. The client further monitors both the line status of the callee and the incoming SIP stack for synchronizing the CLI information and either get or retrieve the multimedia components of the business card. A player internal to the user phone renders and plays the business cards.