overview of tetra and its services & facilities ole arrhenius nokia 17.06.2002
TRANSCRIPT
Overview of TETRA and its
Services & Facilities
Ole Arrhenius
Nokia
17.06.2002
Agenda• TETRA and its objectives
• Standards, system architecture
• Interoperability
• TDMA technology
• Voice communication services
• Data communication services
• Future
Objectives behind TETRA standard
• Define a digital Professional Mobile Radio (PMR) standard to satisfy the current and future needs of especially Public Safety and other PMR users across Europe
• Unite fragmented PMR markets into one common market - harmonized use of spectrum
• Fulfill European authority co-operation requirements (Schengen Treaty) to enable European Integration – cross-border operation using common frequency spectrum
Goals during TETRA standard creation
Users:•desired features•choice•competition
Radio regulators:
• spectral efficiency
• harmonisationOperators:• desired features• data services• competition• cost effectiveness
Manufacturers:• open market volumes• to ensure open standards, the
ETSI IPR policy stipulates patented solutions to be made available at fair and reasonable terms
TETRA is no longer limited to only Europe • TETRA has been adapted by
many countries outside Europe, especially in Asia
• Latin America and Africa also emerging
• In early 2001 TETRA was awarded industry standard status in China
• Several TETRA contracts in China already now
Core TETRA standards and standard interfaces• Air Interface (AI)• Voice plus data (V+D)• Direct Mode Operation (DMO) • Conformance testing • TETRA Speech Codec• Packet Data Optimized (PDO) DMO
• Inter-System Interface (ISI)• Peripheral Equipment Interface (PEI)
AIISI
PEI
Network ANetwork B
Co-operationgroup 1
Authorised dispatcher can modify groups over the air
DWS
Ambulance group 1
Police group 1
Operational Management
• Organisations’ own dispatchers manage their own virtual private networks
• Co-operation when needed
Physical Radio Network
Technical Management
Network Management
-------------------------------------------
Technology developmentTechnology development
Interoper-abilitytests
Interoper-abilitytests
Road to interoperability
Use
rre
quir
em
ents
ETSI standardisation
process
ETSI standardisation
process
Use
r and
regula
tory
requir
em
ents
ManufacturersimplementationsManufacturers
implementations
Use
rre
quir
em
ents
Standard
MARKET
Products and feature
sInteroperabilityprofiles under
TETRA MoU
Interoperabilityprofiles under
TETRA MoU
Interoperability between products and features
Interoperability in practice
TETRA Interoperability ensures a multi vendor market with healthy price competition
Today we have wide participation in the interoperability work
Sepura Ltd
Sepura Ltd
TETRA TDMA principle • TDMA (Time Division Multiple Access)• 4 channels per 25 kHz carrier• 4 calls per 25 kHz carrier (data or voice)• Voice and Data can be transmitted
simultaneously
Four user channels multiplexedinto one 25 kHz carrier
SPECTRUMEFFICIENCYSPECTRUMEFFICIENCY
4 channels12
34
36 kbits/sgross bit
rate
Carrier
What makes TETRA unique
• Uncompromising security– authentication of radios (and networks)– air interface encryption, – end-to-end encryption support– disabling of stolen radios
• Access to data from the field with TETRA data services• TETRA radio interface is designed and optimized for circuit voice
and packet data
• Instant group communication• Fast call set-up time• Direct Mode (DMO)• Queuing • Pre-emptive priorities• Versatile dispatching and fleet management
possibilities
TETRA service classification
• TETRA is not only a radio access standard, it is also a standard defining the services and functionality
Bearer services = data transport:
- packet, circuit, single/multi-slot
Bearer services = data transport:
- packet, circuit, single/multi-slot
Teleservices = voice calls:
- one-to-one, group, broadcast
Teleservices = voice calls:
- one-to-one, group, broadcast
Nearly 30 supplementary services:- priorities, late entry, DGNA, …- fleet services- telephony supplementary services
Nearly 30 supplementary services:- priorities, late entry, DGNA, …- fleet services- telephony supplementary services
Voice communication services
• Excellent voice quality• Fast call set-up• Individual (one-to-one) calls• Express calls (push and talk)• Group communication
– group calls– scanning of groups– dynamic regrouping– group area– broadcast groups
• Emergency calls• Direct mode
Dispatcher functions
• Group monitoring & communication • Joining groups• Preemptive speech item• Group member list• Dynamic regrouping• Broadcast group.
Data communication services
• Status service
- efficient, real time
• Short Data Service, SDS
- text messaging + applications
• IP packet data
- opens the world of network connectivity
• Circuit mode data
- for specialized applications like video surveillance
Database
• Intra/Internet access, work orders, fleet management, reporting
• Database access, work orders, fleet management, reporting
End-to-end applications for end-user needs
Seamless Communications through TETRA• TETRA functionality provides officer safety and ultimate
reliable and secure access
Dispatchers
User organizations
Endusers
IT servers
WAP servers
TETRA base station
TETRA exchange
Network management
servicesplanning and deploying
TETRA terminals
Dispatching solution
Integrated commad and control
PSTNPABXISDN
Connectivity products
TETRA applications
LANWAN
IntranetInternet
Future with TETRA • ETSI board decided to initiate standardisation of TETRA Release 2
– fast packet data --> next generation for professional users
– improved 3G cellular interworking
– radio network performance improvement study project
– rural long range cells
• ETSI work continues under updated Terms of Reference
• Future-safe technology --> TETRA will take advantage of all available and coming mainstream technologies as GSM, WLAN, GPRS and 3G
Conclusions• TETRA is the global open standard for
digital professional radio communications
– mission critical voice and group dispatch
– mobile telephony
– advanced data transfer and applications
• Real and open multi-vendor supply
• TETRA brings Internet/Intranet access to mobile workforce
• TETRA is secure
TETRA is ready, TETRA is future-proof, TETRA is globalTETRA is ready, TETRA is future-proof, TETRA is global