MCPTT Relay Architecture for Tactical WiFi Bubble Coverage
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Solution Overview
Problem
Existing mission-critical push-to-talk (MCPTT) systems face challenges in achieving nationwide coverage and economic viability due to the need for a large number of base stations, especially when transitioning from analog and digital communication systems to broadband systems like LTE/5G, and existing solutions fail to meet mission-critical communication requirements.
Innovation Solution
Extending LTE networks with a 'tactical WiFi bubble' around access points to facilitate group communication, allowing access points to relay messages and manage identities, even when only one access point has LTE connectivity, ensuring seamless communication within the WiFi bubble.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 3GPP-standardized terminals are used for broadband communication, then communication capability is improved, but infrastructure cost and complexity increase significantly due to requiring a large number of base stations
Solution Approach 1:
The patent introduces an access point as an intermediary device between LTE base stations and terminals. The access point creates a tactical WiFi bubble that mediates communication, allowing terminals to connect to the LTE network indirectly through the access point. This intermediary approach enables broadband communication capability while reducing the need for extensive LTE base station infrastructure.
2Area of stationary object
If base stations increase transmission power to achieve nationwide coverage, then coverage area is improved, but energy consumption and operational cost increase
Solution Approach 1:
The patent segments the coverage area into multiple tactical WiFi bubbles, each created by an access point with lower transmission power. Instead of relying on a few high-power base stations, the system uses multiple low-power access points that collectively provide nationwide coverage. This segmentation approach reduces energy consumption per device while achieving the same overall coverage area.
3Area of stationary object
If a large number of base stations are deployed to achieve nationwide coverage, then coverage area is improved, but economic viability deteriorates
Solution Approach 1:
The access point serves as a cost-effective intermediary that leverages existing WiFi technology and infrastructure. Rather than deploying expensive LTE base stations throughout the country, the system uses affordable access points that can be strategically placed. This intermediary approach maintains nationwide coverage while significantly improving economic viability by utilizing lower-cost hardware.
4Area of stationary object
If traditional PTT networks are extended remotely via intermediary networks, then network coverage is improved, but communication reliability deteriorates as mission-critical requirements are not met
Solution Approach 1:
The patent implements preliminary actions to ensure mission-critical reliability before communication occurs. The MCPTT server pre-establishes call sessions and manages speaker identification in advance. The access point pre-configures the tactical WiFi bubble with proper authentication and session management. These preliminary actions ensure that when communication is initiated, all mission-critical requirements are already satisfied, maintaining high reliability while extending coverage.
Data Source
AI summary
A system for providing communications services, comprising a first wireless communication network with a MCPTT infrastructure suitable for MC PTT communication and a relay which transmits the communication to a second wireless network in which terminals which participate in MCPTT communication are registered as MCPTT clients, characterized in that the relay takes over the data exchange necessary for setting up MCPTT voice communication, avoiding the MCPTT clients being involved in the data exchange with the MCPTT server.