Tài liệu Mobile & wireless networking - lecture 11 3gpp telecommunication systems - geert heijenk

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3GPP Telecommunication Systems Today & Tomorrow Gert-Jan van Lieshout Samsung Electronics Research Institute Deventer, The Netherlands Gert.vanLieshout@samsung.com Mobile and Wireless; 25-3-2010 Global Standard & Strategy Outline Outline   3rd Generation Partnership Project (3GPP) [3]   UMTS Release-99   Introduction [4-6]   UMTS Radio Interface Protocol Architecture / UMTS Network Architecture   Universal Terrestrial Radio Access Network (UTRAN) [7-13]   Access Stratum <-> Non Access Stratum [14-22]   UMTS evolution   UMTS radio in Rel-5,6,7,8….. [23-25]   PS CN evolution: IP Multimedia Core Network System (IMS) [25-34]   Rel-5 reference architecture [35]   Changing Telecom landscape [36]   Long Term Evolution (LTE) / Enhanced Packet Core(EPC) [37–46]         Design goals UMTS <-> LTE radio comparison LTE/EPC Architecture LTE-advanced   Summary [47] Mobile and Wireless; 25-3-2010 Global Standard & Strategy 2 3GPP 3GPP structure (Europe) (USA) (China) (Japan) (Korea) (Japan) WWW.3GPP.ORG Mobile and Wireless; 25-3-2010 Global Standard & Strategy 3 UMTS Rel-99: Introduction Reminder Radio Interface Protocol Architecture L3 Radio Bearers Control PDCP control control control control RRC RLC RLC PDCP L2/PDCP RLC RLC RLC RLC RLC BMC L2/BMC RLC L2/RLC Logical Channels MAC L2/MAC Transport Channels PHY Medium Access Control protocol Packet Data Convergence Protocol Mobile and Wireless; 25-3-2010 L1 Radio Link Control protocol Radio Resource Control Protocol Global Standard & Strategy Source: 25.301 4 UMTS Rel-99: Introduction Data flow example - loading a web page Reminder Application ~ 2 kByte Application object HTTP segment ~ 2 kByte HTTP Header TCP segment 492+20 Byte IP packet 512+20 Byte MAC PDU 42+1 Byte L1 43+2 Byte Mobile and Wireless; 25-3-2010 RLC Header MAC SDU RLC SDU MAC Header TB Global Standard & Strategy TCP Header PDCP Header PDCP SDU RLC SDU TCP payload IP Header IP payload PDCP PDU 492+2 Byte RLC PDU 40+2 Byte TCP Header TCP payload RLC Header MAC SDU CRC TB MAC Header CRC 5 UMTS Rel-99: Introduction UMTS network architecture BSS A MSC CS-domain PSTN/ ISDN Gb HLR Iu Uu UTRAN Iu GSN PS-domain Gi IP CN Two CN domains: - Circuit-Switched (CS) domain - Packet-Switched (PS) domain Mobile and Wireless; 25-3-2010 Global Standard & Strategy 6 UMTS Rel-99: UTRAN The CRNC role Core Network Iu Iu UTRAN RNS RNS Iur CRNC Iub Node B Iub CRNC Iub Node B Node B Iub Node B •  Each RNC acts as Controlling RNC (CRNC) for the directly connected Node Bs and cells Mobile and Wireless; 25-3-2010 Global Standard & Strategy 7 UMTS Rel-99: UTRAN UTRAN Architecture Core Network Iu Iu UTRAN RNS RNS Iur RNC Iub Node B RNC Iub Iub Node B Node B Iub Node B Uu (the “radio interface”) UTRAN: RNS: RNC: Node B: UE: UTRA Network Radio Network Subsystem Radio Network Controller “Base station” User Equipment Mobile and Wireless; 25-3-2010 UE Source: 25.401 Global Standard & Strategy 8 UMTS Rel-99: UTRAN The SRNC role Core Network Iu Iu UTRAN RNS SRNS Iur RNC Iub Node B SRNC Iub Iub Node B Node B Iub Node B UE •  Each connected mode UE is controlled by a Serving RNC (SRNC) •  The SRNC terminates Iu towards the CN Mobile and Wireless; 25-3-2010 Global Standard & Strategy 9 UMTS Rel-99: UTRAN The DRNC role Core Network Iu Iu UTRAN DRNS Macro Diversity Combining splitting function SRNS Iur DRNC Iub Node B SRNC Iub Iub Node B Node B Iub Node B UE •  WCDMA requires soft handover (macro diversity) •  An RNC lending resources to an SRNC for a specific UE acts as a Drift RNC (DRNC). Mobile and Wireless; 25-3-2010 Global Standard & Strategy 10 UMTS Rel-99: UTRAN Functionality split between nodes   Serving RNC   Overall control of the radio connection to a UE in connected mode   Drift RNC   Lending resources to SRNC for specific UE   Controlling RNC   Overall control of the radio resources of a cell: codes, power, interferen ce   Node B   Radio transmission & reception   UE   Connected mode: acts under the control of the SRNC   Idle mode: procedures specified in 25.304 (UE Idle Mode behaviour) Mobile and Wireless; 25-3-2010 Global Standard & Strategy 11 UMTS Rel-99: UTRAN Why Iur ? Core Network Iu Iu UTRAN DRNS SRNS Iur DRNC Iub Node B SRNC Iub Iub Node B Node B Iub Node B UE •  Enable inter-RNC Soft handover •  Hide radio network functions from CN •  Avoid ping-pong effects on CN Mobile and Wireless; 25-3-2010 Global Standard & Strategy 12 UMTS Rel-99: UTRAN Connected mode Inter-RNC mobility Core Network Core Network Iu DRNS Iu SRNS Iur SRNS RNS Cells Without SRNS Relocation UE UE With SRNS Relocation   When changing RNC area, there are two options:   immediate SRNS Relocation, i.e. move SRNC role to the new RNC   or use Iur and retain old SRNC (do SRNS Relocation later or never) Mobile and Wireless; 25-3-2010 Global Standard & Strategy 13 UMTS Rel-99: AS <-> NAS Uu (radio) interface: Terminal to Network UE Uu Mobile and Wireless; 25-3-2010 Network / “Infrastructure side” Global Standard & Strategy 14 UMTS Rel-99: AS <-> NAS Iu interface: Separates RAN from CN Non-Access Stratum functionality Access Stratum, Radio Network functionality - all WCDMA specific functionality - no user service specific functionality UE UTRAN Uu Mobile and Wireless; 25-3-2010 Iu Global Standard & Strategy CN 15 UMTS Rel-99: AS <-> NAS Connected vs. Idle mode UE1 -> Iu-Conn. Y Iu-connection Y Core Network Iu UE2 -> LA 403 Iu UTRAN = Data record UE1 -> Cell X RRC-connection X Cells LA 403 (Location Area) Uu (the “radio interface”) UE 1, Connected mode Mobile and Wireless; 25-3-2010 UE 2, Idle mode Global Standard & Strategy 16 UMTS Rel-99: AS <-> NAS Radio Access Bearers & Radio Bearers     NAS requests AS for Radio Access Bearer (RAB) A RAB consists of 1 or more RAB subflows         To give Unequal Error Protection to different bits, e.g. coded speech Each RAB subflow corresponds to one Radio Bearer The Radio Bearer is the service of L2 of the Radio Interface UTRAN selects WCDMA channel type and parameters based on:   QoS requirement of the Radio Access Bearer   Observed traffic pattern   Radio resources available RLC Mobile and Wireless; 25-3-2010 Global Standard & Strategy Radio Access Bearers -> Radio Bearers RLC RLC RLC Layer 2 RLC 17 UMTS Rel-99: AS <-> NAS UMTS Bearer Model UMTS TE MT UTRAN CN Gateway CN Iu EDGE NODE TE End-to-End Service TE/MT Local Bearer Service UMTS Bearer Service Radio Access Bearer Service Radio Bearer Service Iu Bearer Service UTRA FDD/ TDD Service Physical Bearer Service External Bearer Service CN Bearer Service Backbone Bearer Service Access Stratum Mobile and Wireless; 25-3-2010 Source: 23.107 Global Standard & Strategy 18 UMTS Rel-99: AS <-> NAS UMTS Bearer / RAB classes Source: 23.107 Mobile and Wireless; 25-3-2010 Global Standard & Strategy 19 UMTS Rel-99: AS <-> NAS RAB Attributes Source: 23.107 Mobile and Wireless; 25-3-2010 Global Standard & Strategy 20
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