Long Term Evolution - LTE. A short overview

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1 Long Term Evolution - LTE A short overview

2 LTE Architecture 2

3 Conformance Test Suite Specification 3 GPP and ETSI product 3GPP TS Evolved Universal Terrestrial Radio Access (E-UTRA) User Equipment (UE) Protocols Radio Resource Control Protocol (RRC) NAS security (UE <-> MME) S1-MME (E-UTRAN <-> MME) 3

4 LTE Architecture in Detail UE LTE-Uu 4

5 Test system architecture E-UTRAN/UE Test control, Logging TTCN-3 generated code Codec System Simulator HW System Adaptor (SA) Platform Adaptor (PA) Protocol layers internal interface Host-PC System dependent layers System dependent layers UE internal interface air interface LTE-Uu 5

6 Test Architecture (2) MTC: Synchronisation Upper Tester at/mmi commands at/mmi commands PTC: E-UTRAN Config data, status info Coordination messages PTC: UTRAN Config data, status info system interface Adaptation Layer UE Uu Config and Control Data PDUs Protocol Stack System Simulator 6

7 LTE Test Suite Features Full-featured tests for Radio Resource Control Protocol (RRC) TS v ( ) UE <-> E- UTRAN Ready for E UTRAN / UTRAN / GSM Exhaustive set of context parameters For flexible adaptation of LTE tests to the UE (implementation under test) PDCP/RLC/MAC configurations triggered by TTCN-3 7

8 LTE Test Suite Features (2) Fully automated test execution Platform-independent test execution Executable tests can be ported onto various test devices and test platforms Test tracing on different levels of detail Summary of test results Test definition and documentation In the standardized test notation TTCN-3 8

9 LTE Architecture 9

10 Additional Codec Plugin Support RRC (included in the test suite) UE <-> E- UTRAN ASN.1 Codec generation S1 Application Protocol E Note B <-> MME Mobility Management Entity TS v 810 ( ) Type System and ASN.1 Codec generation TA SCTP Plugin X2 Application Protocol E-UTRAN Note B <-> E-UTRAN Note B TS v 810 ( ) TA SCTP Plugin 10

11 Extending the LTE Test Suite Adding new test cases As easy as writing TTCN-3 Adding new test configurations Use TTCN-3 component and configuration features Extensibility Additional LTE Features New and all upcoming features for LTE 11

12 Abbreviation 3GPP: 3rd Generation Partnership Project ARQ: automatic repeat request enb: E-UTRAN NodeB base station EPC: evolved packet core E-UTRAN: evolved UMTS terrestrial radio access network LLAPI: low-level application programming interface LTE: long term evolution MAC: medium access control MLAPI: medium-level application programming interface MME: mobility management entity NAS: non-access stratum PDCP: packet data convergence protocol PDN: packet data network RLC: radio link control P-GW: PDN gateway RB: radio bearer RRC: radio resource control RRM :radio resource management S-GW: serving gateway UE: user equipment UMTS: Universal Mobile Telecommunications System 12

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