Real-Time Exchange Architecture for Wireless Voice Services
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Solution Overview
Problem
Current wireless communication systems face challenges in providing advanced voice services that comply with both existing and emerging standards, offering superior user experiences while minimizing handset upgrades and avoiding the costs and limitations of dedicated private networks or Voice over IP solutions.
Innovation Solution
An architectural framework for advanced voice services that interfaces with wireless networks to provide group call setup and messaging, utilizing a Real-Time Exchange (RTX) that communicates directly with the Mobile Switching Center via the Mobile Application Part (MAP) interface, bypassing the Short Message Service Center (SMSC) for presence messages, and pre-provisions handsets to reduce customer interaction during activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated private network is installed to provide group-based voice services, then service reliability is improved, but device complexity and installation cost increase
Solution Approach 1:
The patent merges group-based voice services with the existing public wireless network infrastructure. The real-time exchange integrates with the mobile switching center and uses existing SMS infrastructure (SMSC, SMS gateway) to provide P2T services, eliminating the need for a separate dedicated private network while maintaining service reliability
Solution Approach 2:
The real-time exchange is designed to provide multiple functions including call setup, presence messaging, and group management within a single network element that interfaces with existing public network infrastructure. The system can handle both individual and group calls, and supports multiple wireless standards (CDMA, GSM, UMTS) through a universal architecture
2Adaptability or versatility
If Voice over IP technology is used to provide group-based voice services, then adaptability to emerging standards is improved, but call setup time increases and service reliability deteriorates
Solution Approach 1:
The real-time exchange acts as an intermediary between the public network infrastructure and the P2T services. It receives presence messages through the SMS infrastructure and manages group calls using traditional circuit-switched voice channels, ensuring reliable service delivery while complying with emerging wireless standards through standardized interfaces
Solution Approach 2:
The patent replaces the packet-switched VoIP mechanism with a circuit-switched voice channel mechanism for actual P2T calls. Presence messaging uses SMS protocols, but the voice communication itself uses dedicated circuit-switched channels, providing more reliable service compared to packet-switched approaches while maintaining standard compliance
3Reliability
If presence messages are routed through the SMSC gateway, then message delivery reliability is improved, but message transmission time increases
Solution Approach 1:
The real-time exchange establishes direct MAP interface connections with the mobile switching center in advance, enabling presence messages to be routed directly without passing through the SMSC gateway. This preliminary setup of direct communication paths reduces transmission time while maintaining reliability through pre-established trusted connections
Solution Approach 2:
The patent extracts the presence message routing function from the traditional SMSC gateway path and creates a dedicated direct routing path between the real-time exchange and mobile switching center using MAP interfaces. This separates the presence messaging function from general SMS routing, reducing transmission time for presence-specific messages
4Adaptability or versatility
If handsets are activated with full customer interaction required, then service customization is improved, but activation time and customer service cost increase
Solution Approach 1:
The system performs preliminary provisioning of handsets with P2T service capabilities before customer activation. Service parameters, group memberships, and user profiles are pre-configured in the real-time exchange and HLR, allowing customers to activate service immediately with minimal interaction, reducing activation time while maintaining customization through pre-configured profiles
Data Source
AI summary
Advanced voice services, such as Push-to-Talk (P2T), Push-to-Conference (P2C), Upgrade to Conference (upgrade from P2T to P2C), Push-to-Message (P2M) and group SMS (Short Message Service), are provided for wireless networks. These services are provided by an architectural framework that interfaces into the wireless network in order to provide group call setup and messaging. Handset pre-provisioning reduces customer interaction in the process of activating handsets for use in the network. Presence messages are communicated between handsets and a real-time exchange using the Short Message Service (SMS), but without having to transmit the messages through a Short Message Service Center (SMSC) gateway, but instead the messages are transmitted using Mobile Application Part (MAP) interface connecting the real-time exchange directly to a mobile switching center.