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2001-01-26 Lucent Technologies - Proprietary slide 1 Untersuchung Adaptiver Multimedia-Anwendungen über UMTS Michael Link, Stefan Gruhl, Markus Bauer,

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Presentation on theme: "2001-01-26 Lucent Technologies - Proprietary slide 1 Untersuchung Adaptiver Multimedia-Anwendungen über UMTS Michael Link, Stefan Gruhl, Markus Bauer,"— Presentation transcript:

1 2001-01-26 Lucent Technologies - Proprietary slide 1 Untersuchung Adaptiver Multimedia-Anwendungen über UMTS Michael Link, Stefan Gruhl, Markus Bauer, Michael Söllner Global Wireless Systems Research Bell Labs, Nürnberg mlink@lucent.com ITG Workshop “IP in Telekommunikationsnetzen” 26.01.2001

2 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 2 3G Wireless Multimedia Multimedia Application Servers 3G Wireless Network IP Unified Messaging Video Streaming Content Access M-Commerce Multimedia Application Clients Personal Information Management UMTS Radio Link Emulator IP

3 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 3 Outline  UMTS QoS Framework  UMTS Demonstrator –Objectives and Concepts –Architecture –QoS Flows Concept –Radio Link Emulation –Configuration & Monitoring Tool  Application Example

4 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 4 UMTS QoS Framework Middleware UMTS Application TE MTUTRAN Service Provider Network / Internet CN Gateway CN EDGE Radio Bearer Service Iu Bearer Service UMTS Bearer Service: UMTS QoS Backbone Bearer Service Radio Access Bearer Service CN Bearer Service TE/MT Local Bearer Service External Bearer Service API UMTS ServerClient End-to-End Bearer Service GPRSHiperlan ….UMTS End-to-End Application: QoS requirements & adaptation

5 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 5 UMTS Demonstrator - Objectives  Joint evaluation and optimization of UMTS packet data services and multimedia applications  Real-time UMTS radio link emulation is required for the evaluation of –interactive applications, –control loop performance of adaptive applications.  Support of standard applications: –IP interface –QoS support for QoS-unaware IP applications

6 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 6 UMTS Demonstrator - Concepts  Real-time UMTS radio link emulation running on Linux PC, multimedia applications on Laptops, all connected by LAN  Layer 1/2 UMTS radio protocol stack emulation for user plane data traffic, including: –RLC segmentation & ARQ –MAC scheduling –PHY bit-error injection  QoS flow concept: individual QoS setting for each TCP or UDP data flow Application Server “UMTS Proxy” Application Client LAN WLAN

7 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 7 UMTS Demonstrator - Architecture LAN IP Address Translation & Checksum IP Dispatcher Configuration & Monitoring Tool Multimedia Data, Control & Signaling Application ClientApplication Server UMTS Proxy Configurator IP Kernel Module UMTS Radio Link Emulation UMTS Module UDP TCP IP Multimedia Data, Control & Signaling UMTS Proxy UDP TCP IP

8 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 8 QoS Flows Concept Problem: current applications do not support QoS procedures. Each TCP or UDP connection is treated as an individual flow:  Flows are distinguished by source/destination IP address and port numbers.  To each flow, an individual service is assigned: –A service is defined by UMTS Traffic Class and maximum bit-rate. –Services are mapped to UMTS radio link protocol parameters.  Example: differentiation between TCP call setup and UDP data streaming

9 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 9 Emulated UMTS Services Mapping of UMTS Traffic Class and bit-rate to radio protocol parameters:

10 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 10 UMTS Radio Link Emulation Database: Service parameters Frame error model parameters Error gap distributions UMTS Layers: RLC MAC PHY retransmission requests frame CRC flags IP packet from IP translationto IP Flow identification IP queues RLC segmentation on demand RLC error control & re-assembly PHY frame error model & bit error injection MAC scheduling

11 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 11 PHY Emulation Frame Error Model Bit Error Model if frame error Bit error pattern Error Model Database Scenarios Events Parameters  Real-time emulation required  Nested model for the output of the channel decoder  Error model parameters: –derived from link-level simulations –database for various scenarios

12 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 12 Configuration & Monitoring Tool

13 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 13 Example - Video Streaming IP-based streaming & videophone applications:  Some but limited delay  UDP transport  packet loss  Application specific control loops: –error control by buffering, retransmission, and slow bitrate adaptation –designed for Internet congestion –inefficient for wireless link  Standards & implementations: –RTP/RTCP, RTSP –Real Video Streaming –Windows Media Streaming –MS NetMeeting (H.323)

14 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 14 Example Session - Parameters Applications  Windows Media Streaming: –multiple bitrate stream: 26/40/60/80/120/200/300 kbps (audio: 8 kbps) –buffer:  3 seconds  Real Video Streaming: –multiple bitrate stream: 20/34/45/80/150/225/350/450 kbps (audio: 5-32 kbps) –buffer:  3 seconds UMTS Proxy  Frame error model: PB = 0.01, LB = 2,  Service:  Streaming 128 kbps, RLC ARQ off  Streaming 128 kbps, RLC ARQ on  Streaming 64 kbps, RLC ARQ on  buffer: 3 seconds (48 kB / 24 kB)

15 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 15 Example Session - Traces Windows Media StreamingReal Video Streaming

16 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 16 Conclusion The UMTS Demonstrator is an integrated, real-time UMTS radio link emulator + application monitoring tool. Application Server IP Application Client UMTS Radio Link Emulator IP Configuration & Monitoring Tool

17 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 17 Backup Slides  Ongoing Work  Protocol Context  IP Interface  UMTS Traffic Classes and QoS Attributes  Supported Applications  References

18 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 18  Physical layer simulations and measurements for the PHY database  UMTS shared channels and MAC scheduling  Signalling delay emulation  QoS API for wireless optimised applications UMTS Demonstrator - Ongoing Work

19 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 19 UMTS Demonstrator - Protocol Context MT UECNUTRAN Radio ProtocolsIu Protocols PDCP RLC MAC FP AAL ATM PHY RLC MAC Iub Uu (Radio) L1 L2 L3 Iu PHY CN Edge CN Gateway Node BRNCSGSN GGSN PDCP UMTS Bearer Service Radio Bearer Service Buffer emulated

20 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 20 IP Interface  IP Kernel Module: –Modification of Linux IP kernel –Table of Client/Server IP address pairs: IP packets arriving at the UMTS Proxy from these hosts are forwarded to the UMTS Module.  IP header address translation: –Uplink: Client  Proxy to Proxy  Server –Downlink: Server  Proxy to Proxy  Client –Client and Server both assume the corresponding peer is running on the Proxy host. –Optional: IP address translation within TCP payload (H.323, FTP)  Checksum re-calculation: –Before error-injection: injected bit-errors result in checksum errors at the receiver and TCP or UDP packet delay or loss, respectively. –After error-injection: forwarding of bit-errors into an error resilient application.

21 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 21 UMTS Traffic Classes

22 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 22 UMTS QoS Attributes  traffic class  max. bitrate  guaranteed bitrate  SDU delivery order  maximum SDU size  SDU format  SDU error ratio  residual BER  delivery of erroneous SDUs  SDU transfer delay  traffic handling priority  allocation/retention priority

23 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 23  Standard IP applications (ftp, telnet, etc.)  Web browsing  MS NetMeeting  Real Video Streaming  Windows Media Services  Video enhanced messaging (“miLife”)... most IP based multimedia application are configurable to run through the UMTS Proxy! Supported Applications

24 Michael Link - ITG Workshop “IP in Telekommunikationsnetzen” - 26.01.2001slide 24 References  S. Gruhl, A. Echihabi, T. Rachidi, M. Link, and M.Söllner, “A Demonstrator for Real- time Multimedia Sessions over 3 rd Generation Wireless Networks”, International Conference on Multimedia and Expo (ICME) 2000, New York, 30 Jul. - 2 Aug. 2000.  3GPP TS 23.107: “QoS Concept and Architecture”  3GPP TS 25.201: “Physical layer - general description”  3GPP TS 25.211: “Physical channels and mapping of transport channels onto physical channels (FDD)”  3GPP TS 25.212: “Multiplexing and channel coding (FDD)”  3GPP TS 25.214: “Physical layer procedures (FDD)”  3GPP TS 25.301: “Radio Interface Protocol Architecture”  3GPP TS 25.302: “Services Provided by the Physical Layer”  3GPP TS 25.401: “UTRAN Overall Description”  3GPP TR 25.944, “Channel coding and multiplexing examples,”  GSMA ISG RP-000304: “Typical Radio Parameter Sets Version 1.2”, TSG-RAN Meeting #8, Düsseldorf, Germany, 21 - 23 June 2000  ITU-T SG 16 Q15-F-45: “Common conditions for video performance evaluation in H.324/M error-prone systems”


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