Caller Identity Presentation Across Packet and Circuit Switched Domains
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Solution Overview
Problem
Current systems fail to provide caller identification for voice calls initiated from data networks like the Internet to circuit-switched domains, as most terminals lack traditional E.164 identifiers, leading to inability to display the calling party's identity in mobile networks.
Innovation Solution
A method and system that associate a circuit-switched (CS) domain identifier with the calling party's identifier, allowing the targeted terminal to recognize and present the calling party's identity using a CS domain identifier, even if the calling party does not have a permanent E.164 identifier, by creating a temporary association for each voice call.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a permanent E.164 identifier is allocated to each user in packet-switched networks, then caller identification can be provided in circuit-switched domains, but network complexity and cost increase
Solution Approach 1:
The patent introduces a gateway as an intermediary component that bridges packet-switched and circuit-switched networks. The gateway translates packet-switched identifiers (such as IP addresses or URI) into circuit-switched identifiers (E.164 numbers) temporarily during call setup, without requiring permanent E.164 allocations for packet-switched users. This mediator approach resolves the contradiction by enabling caller ID transmission through identifier translation rather than direct identifier allocation.
Solution Approach 2:
The system performs preliminary identifier translation and mapping during call setup procedures. Before the actual voice call is established, the gateway pre-translates the packet-switched calling party identifier into a circuit-switched identifier format that can be transmitted through the circuit-switched network. This preliminary action ensures caller identification is available without requiring permanent identifier allocations.
2Adaptability or versatility
If Dual Transfer Mode (DTM) technology is implemented in terminals, then full support for both circuit-switched and packet-switched domains is achieved, but terminal complexity and cost increase
Solution Approach 1:
The gateway acts as a mediator that handles the complexity of domain interworking, allowing simple terminals to participate in cross-domain calls. Instead of requiring terminals to implement complex DTM functionality, the gateway performs the necessary identifier translation and protocol adaptation, enabling basic terminals to achieve cross-domain adaptability through network-side intelligence.
Solution Approach 2:
The patent replaces the need for complex terminal-side DTM implementation with a network-based translation mechanism. Rather than requiring terminals to have dual-mode capability, the system substitutes terminal complexity with gateway-based identifier translation, achieving the same functional result through a different architectural approach.
3Productivity
If VoIP services are used without traditional telephone numbers, then network flexibility and cost are reduced, but caller identification in mobile networks becomes impossible
Solution Approach 1:
The gateway serves as an intermediary that preserves caller identification information from VoIP services. It captures the packet-switched identifier from the VoIP call setup, translates it to a circuit-switched identifier format, and injects it into the circuit-switched network signaling. This maintains network efficiency by allowing VoIP usage without traditional numbers while preventing information loss by translating identifiers for mobile network compatibility.
Solution Approach 2:
The system changes the parameter format of caller identification from packet-switched domain parameters (IP addresses, URIs) to circuit-switched domain parameters (E.164 numbers). This parameter transformation occurs at the gateway during call setup, enabling VoIP services to maintain their flexibility while providing compatible caller ID information for mobile networks.
Data Source
Figure 1
Figure 2~3
Figure 4A
AI summary
Systems, apparatuses and methods for providing the identity of communication device users who initiate communications from data networks such as the Internet and that are targeted for users in circuit-switched domains. A calling party identifier (108) is received (200) from a calling terminal (104) initiating a voice call. A circuit-switched (CS) domain identifier is associated (202) with the calling party identifier. The association of CS domain identifier and calling party identifier (108) is provided (204) to a targeted terminal (106), which may store the associated information. The voice call and the CS domain identifier associated with the calling party identifier (108) are thereafter directed (206) from the calling terminal (104) to the targeted terminal (106). The targeted terminal (106) may then identify the calling party using the CS domain identifier to identify the associated calling party identifier.