Abstract
The UMTS (Universal Mobile Telecommunication System) is the future network for mobile communication systems. The access network of UMTS is called UTRAN (Universal Terrestrial Radio Access Network). Many works focus on the quality of service (QoS) aspects within the UTRAN and the dimensioning aspects of the links between different nodes in the UTRAN. In Release 99 of the 3GPP standard, AAL2/ATM protocol is chosen as a transport protocol within the UTRAN. The Timer-CU is an important parameter for the AAL2 protocol. High Timer-CU values lead to high transfer delays for low bitrate applications, and low values lead to an efficiency loss in the ATM connections. To optimize the choice of this value, we focus our study on the impact of the Timer-CU on the QoS parameters for real time traffic and especially voice applications.
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ETSI TS 125.401 UTRAN Overall Description.
3G TS 23.107 QoS Concept and Architecture
3G TS 22.105 Services and Service Capabilities.
ETSI TR101.112 V3.2.0(1998–04) Selection Procedures for the choice of radio transmission technologies of the UMTS.
ETSI TS 126.101 AMR Speech Codec Frame Structure.
3G TS 25.301 Radio Interface Protocol Architecture.
3G TS 25.427 UTRAN Iub/Iur Interface User Plane Protocol.
3G TS 25.435 UTRAN Iub Interface User Plane Protocols for Common transport Channel Data Streams.
3G TS 25.322 RLC Protocol Specification.
3G TS 25.32 1 MAC Protocol Specification.
3G TS 26.071 AMR Speech Codec; General Description.
3GPP TSG-RAN WG3 Ad Hoc Meeting #2, Paris, France, 6th – 8th November 2000. Transport Network Bandwidth Utilization. Motorola.
ITU-T 1.363.2, B-ISDN ATM Adaptation Layer Specification: AAL Type2.
ITU-T 1.366. 1, Segmentation and Reassembly Service Specific Convergence Sublayer for the AAL type 2.
ITU-T 1.356 B-ISDN ATM Layer Cell Transfer Performance.
ITU-T 1.371 Traffic Control and Congestion Control in B-ISDN.
Minicel project, ENST-Paris, France Telecom-Research and Development (FTR&D), Mitsubishi Electric ITE.
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© 2002 IFIP International Federation for Information Processing
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Makké, R., Tohmé, S., Cochennec, JY., Pautonnier, S. (2002). Impact of the Timer-CU of the AAL2 Protocol on Traffic Performance within the UTRAN. In: Martikainen, O., Porras, J., Hyvärinen, J. (eds) Emerging Personal Wireless Communications. IFIP International Federation for Information Processing, vol 67. Springer, Boston, MA. https://doi.org/10.1007/0-306-47001-2_1
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DOI: https://doi.org/10.1007/0-306-47001-2_1
Publisher Name: Springer, Boston, MA
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