Push-to-Talk Interworking via Synchronized PoC Servers

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Solution Overview

Problem

There is no standard mechanism for enabling Push-to-Talk services between subscribers of different communication network operators, hindering seamless communication across networks.

Innovation Solution

The implementation of Push-to-Talk interworking through synchronized Push-to-Talk over Communication (PoC) application servers, allowing connection and synchronization between members of PoC groups across different network operators, enabling communication without the need for dialing procedures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If dialing procedures are used to set up communication paths between subscribers of different networks, then communication can be established, but the communication process becomes complex and time-consuming

Engineering Contradiction:
Improvecommunication setup processVSAvoiddialing time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The patent applies preliminary action by pre-establishing Push-to-Talk groups and synchronizing application servers across different networks before communication is needed. Users are pre-registered in groups, and servers are pre-configured with routing information, eliminating the need for dialing procedures during actual communication.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent introduces PoC application servers as intermediaries that manage group communication and routing between different networks. These servers handle the complexity of inter-network communication, allowing users to simply press a button to communicate without dealing with network routing or dialing procedures.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Adaptability or versatility

If Push-to-Talk groups are organized across different network operators, then seamless communication is enabled, but system complexity increases due to lack of standard mechanisms

Engineering Contradiction:
Improvecross-network communication capabilityVSAvoidinterworking system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies universality by designing PoC application servers that can operate across multiple network operators and handle various address schemes (IP addresses, phone numbers, SIP-URIs, email addresses). The servers provide universal group management functionality that works independently of the underlying network or addressing method.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent uses parameter changes by allowing the system to adapt to different network parameters and addressing schemes. The application servers can handle various address formats and network configurations by changing their operational parameters, enabling cross-network communication without requiring complex interworking agreements between operators.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If PoC application servers are synchronized to enable interworking, then communication reliability improves, but synchronization overhead increases

Engineering Contradiction:
Improvecross-network communication reliabilityVSAvoidsynchronization overhead
Core Design Contradiction:
ReliabilityVSLoss of energy

Solution Approach 1:

The patent applies partial action by synchronizing only the necessary parameters between PoC application servers, such as group member lists and routing information, rather than synchronizing all system states. This reduces synchronization overhead while maintaining sufficient reliability for cross-network Push-to-Talk communication.

Inventive Principle:
Principle #16Partial or excessive action

Data Source

PatentUS8886242B2Push-to-talk interworking
Publication Date: 2014.11.11 TELEKOM DEUTSCHLAND GMBH
  • US8886242B2 patent drawing
  • US8886242B2 patent drawing
  • US8886242B2 patent drawing

AI summary

A method and system for operating a push-to-talk communication between a PoC-group consisting of at least of one member of a first communication network and a PoC-group consisting of at least of one member of a second communication network, using a PoC application server in each communication network. Members of the PoC-group of the first network operator are connected with the members of the PoC-group of the second network operator, and the PoC application servers are synchronized to each other.