Tutorials

Tutorials will be held on Monday, March 4, 2013. Participation on tutorials are free of charge for registered DRCN participants.

Tutorial 1
9:00 am - 1:00 pm

Reliable Operation of Heterogeneous Wireless Networks with SON (Self-Organizing Networks)

Dr. Henning Sanneck, Szabolcs Nováczki



Objectives

  • Providing a comprehensive introduction to Self-Organizing Networks (SON) applied to 3GPP mobile radio networks
  • Addressing network operation (configuration, troubleshooting, optimization, coordination) processes and how they can be automated with SON functions
  • Giving the latest state-of-the-art in applying SON concepts to “Heterogeneous Networks” (multi-RAT, multi-cell layer, multi-vendor) contributing to address the “traffic explosion” challenge in mobile networks

Intended Audience

  • Researchers in mobile network management automation, fault management / network reliability, autonomic networking, cognitive radio / cognitive networks
  • Engineers working in network operation and optimization at operators and network equipment manufacturers
  • PhD and master students in the area of communication networks

Why the proposed topic is interesting and timely:

Self-Organizing Networks represent a paradigm shift in the Operation, Administration and Management of large mobile radio networks. While the classical OAM approach incorporates configuration, performance and fault management with the human operator “in-the-loop”, SON aims at closed control loops for these management processes. This leads to changes in the way how a mobile network is operated: from a manual (potentially error prone), rather long-term analysis of network status and performance (and the subsequent determination of corresponding configuration changes) towards the definition of how the individual closed control loops and their aggregation shall operate reliably together. This allows, on the one hand, to reflect the current network setup and status as well as the operators’ requirements on network performance and reduces the operational costs. On the other hand, this implies new challenges like the reliable operation of the automated features themselves (e.g., automatic fallback to earlier configurations, automatic resolution of feature interactions / assuring consistency of configurations).

Prerequisite Knowledge of Audience

Basic knowledge on mobile networks, in particular 3GPP, and network management concepts.

Abstract

Due to the decreasing revenue per user, mobile network operators are keen to reduce operational expenses in network deployment and operation. However, at the same time the dramatic increase of traffic in their networks requires new radio access technologies (RAT) like LTE to be deployed, in addition to existing 2G and 3G networks. To extend capacity as well as coverage (incl. indoor), traditional macro networks are complemented by smaller cell layers (micro, pico) down to femto cells, where basestations are even deployed to user's premises.

All these measures result in on one hand efficiently addressing the bandwidth challenge and improving service availability, while on the other hand increasing network complexity counter-acting the initial desire to cut costs. Management complexity comes simply from the increased number of network elements, but also from the requirement to efficiently combine different networks (2G/3G/LTE, femto), including legacy ones.

Self-Organizing Networks (SON) concepts have been proposed already for 3G and LTE macro networks to facilitate deployment (self-configuration), optimization and troubleshooting (self-healing). To cope with the effects of the "Heterogeneous Networks" (HetNet) scenario described above, SON mechanisms are required to automate the network operation.

After introducing some basics on HetNet and SON respectively, the tutorial describes SON functions for network implementation and ongoing automatic configuration. While often discussion of SON is limited to optimization concepts and its OPEX impact, this tutorial specifically focuses on operational reliability like SON-supported troubleshooting and coordinating different SON function instances in a system to achieve a high degree automation while assuring service reliability and availability.

Outline

  • LTE / HetNet / Network Management Basics
  • Introduction to Self-Organizing Networks
  • Self-Configuration: secure auto-connectivity and –commissioning, robust Dynamic Radio Configuration (PCI, ANR)
  • Self-Healing: Cell Anomaly Detection and Diagnosis (incl. demo)
  • Self-Optimization: Mobility Robustness Optimization (MRO)
  • SON Coordination (concurrency control to avoid feature interaction)
  • Integrated SON demo: LTE radio network simulation, centralized self-optimization, SON coordination



Tutorial 2
1:30 - 4:30 pm

Resilience in Modern Transport Networks

Geoff Bennett



This workshop will explain how resilience protocols operate in modern transport networks. The format is specifically designed to focus on aspects of a given technology that affect its ability to provide rapid service protection and restoration.

Who should attend?

Attendees with IP experience will find the IP and MPLS sections to be a useful refresher, while the optical transport sections will contain useful new information. Likewise, experts in optical transport will find the sections on IP and MPLS useful, while discovering the latest developments in optical transmission resilience protocols.

Introduction (15 mins)

  • The Drivers for Efficient Service Protection
  • Transport Network Functional Layers
  • Protection vs Restoration
  • Why 50ms became the “magic number”
  • Scalability Issues in Resilience Protocols
  • Scalability Issues in Transmission Technologies

Topic: Resilience in Traditional Optical Transport Networks (45 mins)

  • SONET/SDH Resilience Mechanisms
  • Shared protection: MS-SPRING
  • Digital vs Optical Operation
  • Rediscovering Digital Optical Networks

Topic: Resilience in Connectionless IP Networks (30 mins)

  • A Quick Review of IP Routing Protocols
  • How Rerouting Works in a Connectionless Architecture
    • Failure Detection
    • Shortest Path Calculation
    • Traffic Rerouting
  • Optimizing Rerouting

Topic: Resilience in MPLS Networks (30 mins)

  • A Quick Review of MPLS
  • Basic MPLS Resilience
  • MPLS Fast Reroute

Topic: New Developments in OTN Resilience (30 mins)

  • The Evolution of G.SMP
  • How G.SMP Works
  • What Features Are Needed for Transport Networks?
  • Scaling Issues in G.SMP

Geoff Bennett is the Director of Solutions & Technology for Infinera, a manufacturer of Digital ROADM next generation transport network switches. He has over 20 years of experience in the data communications industry, including IP routing with Proteon and Wellfleet; ATM and MPLS experience with FORE Systems; and optical transmission and switching experience with Marconi, where he held the position of Distinguished Engineer in the CTO Office. Geoff is a frequent conference speaker, and is the author of “Designing TCP/IP Internetworks”, published by VNR.




Tutorial 3
5:00 - 6:30 pm

Is All-Optical Restoration Possible?

Pin-Han Ho, János Tapolcai, Lajos Rónyai



Failure restoration is a critical functional block in the control and management plane of the Internet. The tutorial talks about the state-of-the-art for monitoring, failure localization, and restoration in an all-optical mesh network. We will firstly discuss the protection and restoration defined in Generalized Multi-Protocol Label Switching (GMPLS), and revisit signaling protocols required to restore a failure. To countermeasure the long restoration time and after-failure multi-hop electronic signaling mechanism in the restoration process, monitoring trails (m-trails) is reviewed and positioned, and the approach that can waive the after-failure signaling while achieving all-optical restoration will be discussed. We will introduce algorithms and construction in achieving optimal deployment of m-trails, and talk about their limitation and applicability.