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1、November 2006,1,TETRA Data Today and Tomorrow,Mark EdwardsPrincipal Staff EngineerMotorola European System Design Centre,TETRA Evolution to Meet Market Needs,Today!,Available Data Capabilities,Shared PD Channels:Reduce Cost,Basic:(Dedicated)The police officer makes his query and waits for the result
2、Meanwhile,nobody else can make use of the PD channel until this transaction finishes.,Advanced:(Shared)At the same time the police officer is waiting for his database response,the police car can be sending its AVLMany users can share the PD channel simultaneously in this way,Simultaneous transaction
3、s over packet data channelPolice officer queries a database and waits for a resultPolice vehicle sends an AVL report to a location server,This could be a data base inquiry,This could be a response to the data base inquiry,shared access uses PD channel capacity more efficientlymore users can share th
4、e PD channelless spectrum and hardware,Shared Access,Multislot Packet Data(MSPD),Same functionality as single slot packet data but fasterPacket Data channel bandwidth is increased up to 4 timesCombining up to 4 single slots(i.e.timeslots)in one packet data channelDynamically change the number of slo
5、ts as voice load variesCo-existence of single and multi slot packet data in whole networkSeparate network resources for single and multi slot at each siteA multislot radio can operate on a single slot channel if necessaryHandover seamlessly between sites,even when the number of timeslots is differen
6、t,Enables sophisticated mission critical data applications,Multislot Packet Data Applications,Reports sent without delayEnquiry responses much sooner,Reports sent when traffic allowsEnquiry response when traffic allows,Simplified and faster information flow,Detailed images in an acceptable transfer
7、timeHighly detailed images download faster,Limited usefulness:It takes a long time to download a useable imageUseable if download time isnt critical,Patrol Officers can swiftly identify a suspect,Image database to verify a suspects ID,Report and text data base enquiries,Single Slot Packet Data,Multi
8、slot Packet Data,Slow Scan Video for surveillance,Good perception of incidents from field cameras,Real time video receptionGood image quality,Display freezes for long periods Low quality images,GPRS and TETRA data rates are similar,Peak=the peak bit rate on the IP channel.Users bit rate depends on a
9、pplication protocols,TETRA has mission critical features that GPRS lacks,i.e.enhanced security,availability,resilienceTETRA shares this bandwidth with less users than GPRS,Multislot Packet Data,Same interactions as single slot packet dataVoice priority over dataSDS messages can be carried in spare c
10、apacity on packet data channelsHigher data rate enables more advanced applications MSPD already defined within the TETRA standardTIP(TTR 001-05)is approvedenables multi-vendor terminal solution,TETRA 2 comparison with TETRA 1,Range(km),Modulation schemes64QAM16QAM4QAM,600 kb/s,500 kb/s,300 kb/s,200
11、kb/s,400 kb/s,100 kb/s,Framing Rate,150 kHz,100 kHz,50 kHz,25 kHz,TETRA 1,28.8 kb/s,Network Upgrade to TETRA 2,Users want to expand networks and support new services and applicationsProtect investmentEase of upgrade,TETRA2 standard was developed with upgrade in mindnew base stations are high speed d
12、ata readysoftware upgrade for base stations and core,TETRA fulfilling Mission Critical Needs,TETRA IP data TETRA single slot packet data provide basic data applicationsTETRA Now Present and future TETRA multi slot packet data provide sophisticated data applications TETRA In the Future Looking toward
13、s the horizonTETRA 2 innovation for new data applications,Spectrum for TETRA2,A challenge to be met by each countrySpectrum requirement for a nationwide TETRA 2 networkAt least 2 x 1 MHz,but 2 x 2 MHz would be betterClose to the TETRA 1 spectrum(350 MHz in China)ETSI analysis on requirements(TR 102
14、513)Now is a good time for operators and users to begin talking to regulators and the TETRA MoU,TETRA Roadmap for Data,TETRA V&D,IP Service,MSPD,Higher SpeedPacket Data,1995First TETRA contract,2000First IP delivered,Future,2005 MSPD delivered,standard,TIP,IOP,standard,TIP,IOP,standard,TIP,IOP,standard,TIP,IOP,Evolutionary stages,
