>> Study Group 2 : Operational aspects of service provision, networks and performance
Question 6/2 – Traffic engieering for mobile communications
- Motivation
Interoperation of different generations of mobile networks, as well as smooth transition towards IMT-2000 systems will coexist with developing architecture concepts for supporting the new value chain in service creation and delivery. This results in the need for adequate dimensioning methods to cost-effectively engineer and manage the underlying infrastructure. Moreover, increased control of end-users on the relationship between cost and quality of accessed services via always more sophisticated negotiation mechanisms add complexity to network operation and, hence, to dimensioning methods. For these reasons, studies on traffic engineering for networks supporting terminal and personal mobility (Personal Communications) developed in the framework of the E-750 series not only need to consider the impact of radio transmission techniques and resource allocation strategies in advanced mobile systems, but also need to consider the advances in mobile-fixed convergence and NGN (Next Generation Networks).
- Question
Considering
- the continued penetration of mobile services, both transaction-based and positioning-based;
- the competitive environment in which mobile services are being offered;
- the trend in the increasing share of mobile-related traffic with respect to the overall traffic volume;
- the need to capitalize on investments in the infrastructure of mobile networks throughout the transition from present mobile systems (e.g. GSM) to more advanced ones (IMT-2000 family);
- the need to provide a seamless communication environment where the end-user is guaranteed extensive roaming possibilities and is shielded from the technicalities related to accessing and interacting with services supported by different system generations;
- that emerging customer/user applications on Next Generation Networks (NGN) have the need for high-quality and seamless interworking;
- the difficulty to provide a uniform and constant QoS to mobile services irrespective of the actual application type, operating environment and mobility behavior;
- the propensity of the customer base to trade-off, under given conditions, a reduced QoS against reduced tariffs;
- the increasing availability to the end-user of means for measuring, monitoring and negotiating QoS, even during the course of the same session;
- the inception of multimedia services supported in the mobile domain;
- the increasing role of signaling in supporting mobile services;
- the availability of means for personalizing the user service profile and maintaining a controlled communication environment (VHE, Virtual Home Environment);
- the increasing importance of IP-based networks;
- the identification of dedicated spectrum for providing the capacity needed by advanced mobile systems, both for the terrestrial and the satellite segment.
What:
- new or revised Recommendations are required to translate traffic demand into capacity expansion of the available radio spectrum? (For example, methods need to be described for cellular systems on how to modify the cellular layout/design and frequency reuse patterns to increase the overall channel capacity.)
- new Recommendations are required to accommodate the characteristics of multimedia services and the adaptive bandwidth techniques underlying the design of advanced mobile systems?
- new Recommendations should be started to assess and monitor the end-to-end service quality related to Personal Communications services, also considering aspects related to roaming and multi-operator domains?
- Recommendations may need to be revisited or started to account for the emerging Next Generation Networks (NGN)?
- existing Recommendations on traffic engineering methods for Personal Communications need revising or deleting because they are no longer useful?
- Tasks
New and revised Recommendations will be produced in the E.750-series, with particular emphasis on dimensioning methods considering the technical aspects characterizing current and advanced mobile systems. Also, the impact of emerging NGN will be considered both with respect to the reference architectures for traffic engineering purposes as well as the traffic processes for load characterization.
A detailed workplan will be maintained and updates will be recorded according to needs. Activity on the E-750 series and priority in progressing existing and new Recommendations are indicated below.
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Recommendation
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Comment
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Priority
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E.750:
“Introduction to the E.750 series of Recommendations on traffic engineering
aspects of networks supporting personal communications services”
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Updating
framework for and scope of the E-750 series.
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High
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E.751:
“Reference connections for traffic engineering of land mobile networks”
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Distinction
between terrestrial and satellite based networks, consideration of NGN
impact.
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High
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E.760:
“Terminal mobility traffic modeling “
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Inclusion
of re-attempt behavior; general revision.
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Low
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E.770:
“Land mobile and fixed network interconnection traffic grade of service
concept”
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Updating
to include typical interconnection arrangements between different (mobile and
fixed) operators.
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Medium
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E.771:
“Network grade of service parameters and target values for circuit-switched
public land mobile services”
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General
revision.
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Medium
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E.772:
“Network grade of service parameters and target values for packet-switched
public land mobile services”
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New
Recommendation capturing advances on wireless packet-switching (e.g. wireless
IP, GSM GPRS/EDGE, IMT-2000 radio interface specifications).
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High
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Draft New
Recommendation E.780: “Dimensioning methods for public land mobile systems”
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New
Recommendation dealing with both pre-IMT-2000 and IMT-2000 systems.
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Medium
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New
Recommendation E.790: “Traffic measurement requirements for networks
supporting Personal Communications services”
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New
Recommendation laying down principles and basic concepts for traffic
measurements with particular emphasis to terminal mobility support.
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Medium
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- Relationships
4.1 Within Study Group 2
A close liaison is required with the other Questions of WP 2/2 (Question 7/2) dealing directly with traffic engineering, as well as with those having activities closely related to traffic engineering, in particular those on Quality of Service (Question 4/2) and Network Management (Question 5/2).
4.2 Within ITU
Liaison activity is required with the following groups:
- ITU-T SG 11 on B-ISDN, signaling, switching and Intelligent Network;
- ITU-T SG 13 on B-ISDN, including B-ISDN network performance parameters
- ITU-T SSG on network aspects of IMT-2000, convergence of mobile and fixed networks, mobility management, interoperability
- ITU-R SG 8, WP 8A (Land mobile service excluding IMT-2000) and WP8F (IMT-2000 and systems beyond IMT-2000)
- ITU-D SG 2 on guidelines for smooth transition towards IMT-2000 systems in developing countries
4.3 With other groups
- International standardization and consensus building bodies (e.g. 3GPP, 3GPP2, ETSI, UMTS Forum, IETF, etc.);
List of Acronyms
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3GPP
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Third
Generation Partnership Project
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3GPP2
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Third
Generation Partnership Project 2
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EDGE
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Enhanced
Data rates for GSM Evolution
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ETSI
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European
Telecommunication Standards Institute
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GPRS
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General
Packet Radio Service
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GSM
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Global
System for Mobile communications
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IETF
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Internet
Engineering Task Force
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IMT-2000
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International
Mobile Telecommunication 2000
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NGN
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Next
Generation Networks
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QoS
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Quality
of Service
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UMTS
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Universal
Mobile Telecommunication System
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VHE
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Virtual
Home Environment
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