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Presentation on behalf of the TETRA + Critical Communications Association 1
Softswitch – the ultimate
TETRA system architecture
Andreas Bode
Rohill
Presentation on behalf of the TETRA + Critical Communications Association
Contents
• History of TETRA switching
• Definition of soft switching architecture
• IP integration opportunities
• Analysis of Total Cost of Ownership
• Technical benefits of soft switching
Presentation on behalf of the TETRA + Critical Communications Association
History of TETRA switching
• Comparison of four common TETRA system architectures
2010
Switchboard Hierarchical circuit switched networks
Hierarchical proprietary IP-based networks
Fully distributed open IP-based networks
Soft switch open IP-based networks
2012 2008 2006 2004 2002 2000 1998
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Overview of hardware & software layers
Hardware Layer 1
Operating System Layer 2
Transport Layer 3
Application Layer 4
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Layer 1 - Hardware Layer 1
Layer 2
Layer 3
Layer 4
PC Server Platform “Network Equipment Building System”
(NEBS) certified Telecom Platform Micro or Advanced TCA
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Layer 2 - Operating system Layer 1
Layer 2
Layer 3
Layer 4
Microsoft / Oracle Open (Carrier Grade) Linux
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Layer 3 - Transport layer Layer 1
Layer 2
Layer 3
Layer 4
Proprietary Open IP
XML UDP IP
TCP HTTP
SSL
SNMP SMB
IPSEC
PPTP
SSH
FTP
T1 / E1
Proprietary IP
Frame Relay
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Layer 4 - Application layer
TETRA on top of dedicated hardware & operating systems
TETRA as Application
Layer 1
Layer 2
Layer 3
Layer 4
Presentation on behalf of the TETRA + Critical Communications Association
Soft switch architecture
• Summary of Benefits
COTS Redundancy
Hardware NEBS platform
Layer 1
Stability Real-time operation
Operating System Linux
Layer 2
Standards-based No vendor lock-in
Transport IP / MPLS
Layer 3
Flexibility Simplicity
Application TETRA
Layer 4
Presentation on behalf of the TETRA + Critical Communications Association
IP integration opportunities
Application Server Dispatch
IP Wireless Broadband network
Network Management
• Transport of TETRA voice, data and signalling
• Exchange of Voice, Status, SDS and Packet Data
• Interfaces for Network Management (SNMP, HTTP)
• Migration to TEDS and Wireless Broadband
TETRA Base Stations
TETRA System (SwMI)
IP backbone
/TEDS
Presentation on behalf of the TETRA + Critical Communications Association
IP integration opportunities
• Future proof
– Based on pure COTS equipment
– Unifying communications (Voice, Data, Video)
– Supports migration to wideband & broadband data (TEDS, LTE)
Presentation on behalf of the TETRA + Critical Communications Association
IP integration opportunities
• Lower cost
– Competitive market for equipment & services
– Lower cost of leased-line interconnection
– One networks versus many dedicated networks
• Flexibility
– Virtual access through whole network
Presentation on behalf of the TETRA + Critical Communications Association
IP integration opportunities
• Benefits of Multi Protocol Label Switching – MPLS is an open IP standard, defined by the IETF
– Offers very fast rerouting - no service interruption
– Opportunity for No-single-point-of-failure
Main SwMI
Standby SwMI
BS2 BS4 BS6
BS3 BS5 BS7 BS1
Ethernet
E1, SDH, Fiber, ...
Main path to BS4
Standby path to BS4
Presentation on behalf of the TETRA + Critical Communications Association
Total Cost of Ownership
• CAPEX – Capital Expenditure
– Equipment cost
• IMPEX – Implementation Expenditure
– Project management, Training, System integration, Installation, Configuration
• OPEX – Operational Expenditure
– Site cost, Link cost, Energy, Maintenance, Support
Presentation on behalf of the TETRA + Critical Communications Association
Analysis of TCO
Aspect Soft switch advantages
CAPEX Fewer hardware components less equipment cost Commercial Off The Shelf (COTS) hardware lower cost of equipment sourcing Simplicity of architecture less development and maintenance effort for supplier
IMPEX
Based on Open IP standards easy integration with IP backhaul networks Fewer hardware and software components less configuration effort Simple configuration and troubleshooting less training cost Simplicity in design and deployment lower project management cost
OPEX
Simplified hardware architecture lower maintenance cost Fewer hardware components lower energy consumption Opportunities for No-single-point-of-failure relaxed service terms Based on Open IP standards shared use of IP backhaul facilities Commercial Off The Shelf (COTS) hardware fewer component obsolescense issues Open standards based equipment less vendor lock-in issues, more competition
Presentation on behalf of the TETRA + Critical Communications Association
Technical benefits
Aspect Soft switch advantages
Functionality All functionality resides in software ultimate flexibility Same software can run in site fallback mode all functionality available in fallback
Performance Single TETRA software application appraches theoretical throughput of TETRA High performance of current CPUs high number of calls / second
Scalability Distributed switching capacity can grow as needed Availability of scalable IP bandwidth opportunity to increase traffic
Availability Fewer hardware components higher inherent system reliability Carrier-class hardware and software high stability and availability No-single-point-of-failure 5-times-9 availability
Security Open IP based encryption and autentication high level of security TETRA encryption in soft switch encrypted communication over IP backhaul
Presentation on behalf of the TETRA + Critical Communications Association
Further reading
• Read white paper “Reliable and Scalable TETRA networks”
• Download from www.rohill.com, Downloads White papers
Presentation on behalf of the TETRA + Critical Communications Association
Summary
• Soft switch technology is truly the ultimate TETRA system architecture
• Minimized vendor lock-in when combined with IP / MPLS
• Results in lowest Total Cost of Ownership
Presentation on behalf of the TETRA + Critical Communications Association
Thank you
www.Rohill.com