IETF D. Kutscher
Internet-Draft F. Mir
Intended status: Informational R. Winter
Expires: September 13, 2012 NEC
S. Krishnan
Ericsson
C. Cano
Universidad Carlos III de Madrid
March 12, 2012
Mobile Communication Congestion Exposure Scenario
draft-kutscher-conex-mobile-03
Abstract
This memo describes a mobile communications use case for congestion
exposure (CONEX) with a particular focus on mobile communication
networks such as 3GPP EPS. The draft describes the architecture of
these networks (access and core networks), current QoS mechanisms and
then discusses how congestion exposure concepts could be applied.
Based on this, this memo suggests a set of requirements for CONEX
mechanisms that particularly apply to mobile networks.
Status of this Memo
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This Internet-Draft will expire on September 13, 2012.
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Copyright (c) 2012 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Internet-Draft CONEX Mobile Scenario March 2012
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Overview of 3GPP's Evolved Packet System (EPS) . . . . . . . . 3
3. CONEX Use Cases in the Mobile Communication Scenario . . . . . 5
3.1. CONEX as a Basis for Traffic Management . . . . . . . . . 6
3.2. CONEX to Incentivize Scavenger Transports . . . . . . . . 7
3.3. Accounting for Congestion Volume . . . . . . . . . . . . . 8
3.4. CONEX as a Form of Differential QoS . . . . . . . . . . . 8
3.5. Partial vs. Full Deployment . . . . . . . . . . . . . . . 9
3.6. Summary . . . . . . . . . . . . . . . . . . . . . . . . . 10
4. CONEX in the EPS . . . . . . . . . . . . . . . . . . . . . . . 10
4.1. Possible Deployment Scenarios . . . . . . . . . . . . . . 11
4.2. Implementing CONEX Functions in the EPS . . . . . . . . . 14
4.2.1. CONEX Protocol Mechanisms . . . . . . . . . . . . . . 15
4.2.2. CONEX Functions in the Mobile Network . . . . . . . . 16
5. Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 19
7. Security Considerations . . . . . . . . . . . . . . . . . . . 19
8. Informative References . . . . . . . . . . . . . . . . . . . . 19
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 21
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 21
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1. Introduction
Mobile data traffic continues to grow rapidly. The challenge
wireless operators face is to support more subscribers with higher
bandwidth requirements. To meet the bandwidth demand, operators need
to seek for new technologies to efficiently utilize the available
network resources, in particular, this concerns resource allocation
and flow management. Ample statistics for network traffic from
cellular networks are available, stating that many short flows exist,
but that a few large flows constitute a large part of the overall
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