TETRA Data Today and Tomorrow.ppt
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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
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