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Rosario Giuseppe Garroppo Università degli Studi di Pisa

Qualità del Servizio nelle reti radiomobili di terza generazione. Rosario Giuseppe Garroppo Università degli Studi di Pisa Dipartimento di Ingegneria della Informazione: Elettronica, Informatica, Telecomunicazioni Gruppo di Ricerca in Reti di Telecomunicazioni wwwtlc.iet.unipi.it.

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Rosario Giuseppe Garroppo Università degli Studi di Pisa

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  1. Qualità del Servizio nelle reti radiomobili di terza generazione Rosario Giuseppe Garroppo Università degli Studi di Pisa Dipartimento di Ingegneria della Informazione: Elettronica, Informatica, Telecomunicazioni Gruppo di Ricerca in Reti di Telecomunicazioni wwwtlc.iet.unipi.it

  2. Applications Legacy mobile & Services signaling Network SCP Multimedia Alternative CSCF IP Networks R-SGW Access Ms Mh Network Mw Mm HSS CAP CSCF Cx Mg Mr Gi Gi Gr Gc MRF Gi TE MT ERAN MGCF T-SGW R Um Iu-ps' Mc SGSN GGSN Iu Gi Gn PSTN/ Gf TE MT UTRAN MGW Legacy/External Gp Gn R Uu EIR GGSN Other PLMN SGSN Signalling Interface Signalling and Data Transfer Interface UMTS Release 2000: All IP network ERAN: EDGE Radio Access Network GGSN: Gateway GPRS Support Node HSS: Home Subscriber Server SCP: Service Control Point SGSN: Serving GPRS Support Node UTRAN: UMTS Terrestrial Acc. Net. CSCF: Call State Control Function MGCF: Media Gateway Control Function MGW: Media GateWay MRF: Media Resource Function R-SGW: Roaming Signalling GateWay T-SGW: Transport Signalling GateWay

  3. Core Network IU IU IUR RNS RNC RNC RNS IUB IUB IUB IUB Site Control Site Control Site Control Site Control Node B Node B Node B BTS BTS BTS BTS BTS BTS BTS BTS BTS BTS MS Node B MS MS MS UTRAN logical architecture RNS: Radio Network System RNC: Radio Network Controller

  4. Application TCP/UDP IP IP GTP-U GTP-U GTP-U RLC RLC TCP/UDP TCP/UDP TCP/UDP GTP-U IP IP IP MAC MAC TCP/UDP L2 L2 L2 IP L1 L1 L1 L1 L1 L2 L1 Uu Gn 3G-GGSN Gi RNS Iu MT 3G-SGSN User plane protocol architecture

  5. CN Iu Edge Node TE MT UTRAN CN Gateway TE End-to-End Service External bearer service TE/MT bearer service UMTS Bearer service Radio access service CN bearer service Iu bearer service Radio bearer service Backbone bearer service UTRA FDD/TDD service Physical bearer service Framework for QoS in UMTS

  6. Adm. Contr . QoS functions for the UMTS bearer service Control plane TE MT UTRAN CN EDGE GATEWAY Ext. Net. Adm./Cap. Adm./Cap. Adm./Cap. Subscr. Adm./Cap. Transl. Transl. Control Control Control Control Control UMTS BS UMTS BS UMTS BS External Service Control Local Service Control Manager Manager Manager RAB Manager Local BS Radio BS Radio BS Iu BS CN BS Ext. BS Iu BS CN BS Manager Manager Manager Manager Manager Manager Manager Manager BB NS BB NS UTRA UTRA Iu NS Iu NS Manager Manager ph. BS M ph. BS M Manager Manager protocol interface service primitive interface • Service Manager • Translaction Function • Admission/Capability Control • Subscription Control

  7. Classif. Cond. Cond. Cond. QoS functions for the UMTS bearer service User plane UTRAN TE MT CN EDGE GATEWAY Ext. Net. Classif. Mapper Mapper Mapper Resource Resource Resource Resource Resource Resource External BS Local BS Manager Manager Manager Manager Manager Manager UTRA phys. BS Iu network service BB network service data flow with indication of direction • Mapping Function • Classification Function • Resource Manager • Traffic Conditioner

  8. UMTS QoS Classes Traffic class Conversational class Streaming class Interactive class Background conversational RT streaming RT Interactive best effort Background best effort - Preserve time Fundamental - Preserve time relation - Request response - Destination is characteristics (variation) between relation (variation) pattern not expecting information entities of between information the data within the stream entities of the - Preserve payload a certain time stream content - Conversational Preserve - pattern (stringent and payload content low delay ) - background Example of the - voice - streaming video - Web browsing download of application emails Transfer delay per UMTS Bearer Service Conversational: 100 ms, Streaming: 250 ms

  9. Wireline Wireless Link Characteristics Transmission Rate High Low Link Errors Rate Low High UNI fixed during the connection UNI changing during the con. Mobility QoS problems: Wireless vs. Wireline • QoS requirements: Bandwidth, Delay, Reliability

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