VoIP Gateway and IEEE 802.16 Interface for Single Number Service
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Solution Overview
Problem
Existing converged voice services between heterogeneous networks, such as cordless and cellular networks, face challenges in charging and service delivery due to their circuit-switched nature and requirement of multiple telephone numbers.
Innovation Solution
A method and apparatus for providing Voice over Internet Protocol (VoIP) service based on an IP multimedia subsystem (IMS) that interfaces with both a VoIP gateway for indoor operations and an IEEE 802.16 system for outdoor operations, using a cordless phone signal processor and Session Initiation Protocol (SIP) message processor to manage communication and registration across different environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If circuit switched based service is provided over different networks (PSTN and cellular), then voice service coverage is extended, but service complexity and charging difficulty increase due to multiple telephone numbers and heterogeneous networks
Solution Approach 1:
The patent implements a universal service access mechanism where a single telephone number can route calls through multiple networks (PSTN, cellular, VoIP) based on terminal location and network availability. The MS (mobile station) automatically selects the appropriate network interface (cordless phone signal processor for indoor, IEEE 802.16 for outdoor) without requiring separate numbers for each network, achieving multi-network functionality through a unified access point.
Solution Approach 2:
The patent introduces a VoIP gateway as an intermediary component that bridges the cordless phone network and the IMS (IP Multimedia Subsystem). This gateway handles protocol conversion and signal transformation between different network types, enabling seamless interworking without requiring complex multi-number configurations. The gateway acts as a mediator that simplifies the interaction between heterogeneous networks.
2Reliability
If multiple telephone numbers are allocated for different networks, then network-specific service delivery is enabled, but charging efficiency and service management deteriorate
Solution Approach 1:
The patent enables a single telephone number to function across multiple networks (PSTN, cellular, VoIP) by implementing intelligent network selection at the MS level. The system maintains network-specific service delivery through protocol-specific processors (cordless phone signal processor, SIP message processor, IEEE 802.16 system processor) while presenting a unified numbering plan to users, thereby simplifying charging management and service accounting.
Solution Approach 2:
The patent dynamically changes network access parameters based on terminal location (indoor/outdoor detection) and network availability. The MS automatically switches between cordless phone interface and IEEE 802.16 interface depending on environmental conditions, maintaining service continuity while enabling unified charging based on a single telephone number rather than multiple network-specific numbers.
3Ease of operation
If cordless phone interface is used for indoor VoIP service, then indoor coverage is improved, but seamless transition to outdoor service requires additional complexity
Solution Approach 1:
The patent implements dynamic network interface selection based on terminal location detection. The MS automatically switches between cordless phone signal processing (for indoor environments) and IEEE 802.16 system processing (for outdoor environments) based on real-time conditions. This dynamic adaptation enables seamless transitions without requiring manual user intervention or complex configuration, as the system autonomously adjusts its operational mode according to environmental context.
Data Source
AI summary
Provided are an apparatus and method for providing VoIP service based on an IP multimedia subsystem (IMS). When a MS is located indoors, it accesses the IMS through a VoIP gateway. When the MS is located outdoors, it accesses the IMS through an IEEE 802.16 system. Therefore, the VoIP service can be provided over one telephone number allocated to the MS.