Flash Caller ID for Roaming via Out-of-Band SMS
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Solution Overview
Problem
Mobile telecommunications subscribers do not receive caller identification (CLI) when roaming in a visited network, as existing solutions are costly, inefficient, or complicate the user experience, and current methods either fail to deliver CLI in a timely manner or require complex arrangements with visited networks.
Innovation Solution
The method involves delivering CLI as a flash SMS directly over SS7 without user interaction, allowing the mobile station to receive caller identification information out-of-band, ensuring it is displayed before the call is accepted, and is independent of the visited network's capabilities, using a flash SMS that mimics the caller's ID to trigger phone book entries and support enhanced features like call handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct link between HPMN and VPMN is established to guarantee CLI delivery, then CLI delivery reliability is improved, but implementation complexity and cost increase
Solution Approach 1:
The patent introduces an SMS message as an intermediary carrier to deliver CLI information. Instead of establishing complex direct links between HPMN and VPMN, the CLI is embedded in an SMS message that can be routed through standard SMS infrastructure, simplifying the network architecture while ensuring reliable delivery.
Solution Approach 2:
The patent extracts the CLI delivery function from the traditional signaling path and implements it through a separate SMS messaging channel. This separation allows CLI to be delivered independently of the voice call setup, avoiding the need for complex inter-network signaling arrangements.
2Device complexity
If CLI is sent after the call, then implementation simplicity is improved, but user decision-making time is lost
Solution Approach 1:
The patent delivers the CLI information in advance via SMS message before the actual call is established. This preliminary delivery of caller identification allows the user to see who is calling and make an informed decision about whether to accept the call, resolving the timing conflict between simple implementation and timely information delivery.
3Adaptability or versatility
If client application is implemented for call control, then call control functionality is improved, but user interface complexity and cost increase
Solution Approach 1:
The patent leverages the universal SMS messaging capability that already exists in mobile devices to deliver CLI information. Instead of implementing a specialized client application, the solution uses the existing SMS infrastructure that all mobile phones support, achieving broad functionality without adding device complexity.
Data Source
AI summary
The present invention relates to methods and apparati for presenting and displaying caller-identifying information to outbound roamers using means outside of the visited network's facility, or communications channels outside of the call path.