Wireless Network Management SANDEEP

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Wireless Network Management SANDEEP
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Network Management

• Network management is a service that employs a
  variety of tools, applications, and devices to
  assist human network managers in monitoring and
  maintaining networks.
• Configuration Management
• Performance Management
• Fault Management
• Accounting Management
• Security Management

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Network Management Architecture
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Network Management

• Configuration Management
• Monitors the Network and system configuration
  information
• Each network device has a variety of version
  information associated with it
• TCP/IP software Version 2.0
• SNMP software Version 3.1
• Performance Management
• Measures various aspects and make them available
  so that the inter network performance can be
  maintained.

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Network Management

• Fault Management
• Detects network problems log them and
  automatically fix them to keep the network
  running safely.
• Accounting Management
• Measures Network Utilization parameters.
• Security Management
• Controls unauthorized access to the network
  resources so that the network is not sabotaged.

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Wireless Network

• A wireless network is a computer network in
  which communication between machines occurs over
  a wireless link.
• Cellular networks
• Verizon, DoCoMo, etc.
• Satellite networks
• Iridium, Inmarsat, etc.
• Battlefield networks
• Communication between tanks, soldiers, etc.
• Wireless Local Area Networks (LAN)
• IEEE 802.11

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IEEE 802.11 Overview

• Adopted in 1997.
• The Connectionless IEEE 802.11 local networks
  define 2 topologies
• Infrastructure Network connected through APs
• Ad-Hoc Network peer-to-peer communication

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Overview, 802.11 ArchitectureInfrastructure
Network
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Overview, 802.11 ArchitectureAd-Hoc Network
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Setting Up a New Wireless Network

• Steps
• Discovery of New Access Point
• Transfer of PIN
• Registration Protocol runs as EAP
  (Authentication) method
• New AP Settings sent

Access Point
Discovery
Transfer of PIN
Registration Protocol
Securely Connected
New AP Settings
Registrar
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Setting Up a New Member Device
Access Point
Registration Protocol Continues
Securely Connected
UPnP Event
Start (Authentication) EAP
Discovery
Reads PIN from Enrollee
New Enrollee Notification
Registrar
Enrollee
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Signal Monitoring System for managing the
wireless Network

• To Manage the wireless networks system a signal
  monitoring system can be used.
• This system does not interfere with the regular
  network operations.
• Listens
• Measures
• Sends alarms

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System Architecture
NETWORK MANAGEMENT CENTER
Cellular Network
PERFORMANCE MANAGER
Scanning Receivers
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Implementation of the Management System

• There 2 high level versions of implementation
• Centralized Performance Manager
• Distributed Performance Manager

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FAULT MANAGEMENT SYSYTEM

• THE PERFORMANCE MANAGER
• THE NETWORK MANAGEMENT CENTER

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The Performance Manager

• The Scanner Interface
• The Measurement Database
• The Alarms Generator
• The NMC Interface

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Performance Manager Structure
MEASUREMENT DATABASE
ALARM GENERATOR
SCANNER INTERFACE
NMC INTERFACE
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The Performance Manager

• The Scanner Interface
• Two Modes
• Transmit Mode Downloads list of scanning
  channel identifiers and sends them to the
  associated scanner for measurements.
• Receive Mode collects the measured data from
  the scanners according to the list of channel
  identifiers previously sent for measurement.

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The Performance Manager

• The Measurement Database
• It is a Relational Database that stores the
  received data in the scanner interface (receive
  mode)
• It consists of tables

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The Performance Manager

• The Alarm Generator
• Periodically reads the measurements for each
  controlled scanner and each controlled base
  stations.
• Evaluates if any measurement is exceeding or
  going below the predefined thresholds, then it
  correlates with the measuring signals of same BST
  as well as the corresponding BST

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The Performance Manager

• The Alarm Generator
• If correlated results indicate poor coverage, the
  alarm generator generates an alarm to NMC and
  sends via NMC interface in performance manager
  structure.

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The Performance Manager

• The Alarm Generator
• Alarm contains the following information
• BSC identifier
• BST identifier
• Faulty channel identifier
• Alarm code
• Alarm description
• Scanner identifier
• Scanner location
• Timestamp
• Alarm severity

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The Performance Manager

• The NMC Interface
• It enables communication between the performance
  manager and the Network Management center
• It has two modes
• Transmit sends alarm from alarm generator to
  NMC
• Receive It receives the channel identifiers for
  each base station and forwards the list via
  scanner interface

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The Network Management Center

• The Performance Manager Interface
• The Management Information Base
• The Graphical User Interface

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The Network Management Center

• The Performance Manager Interface
• Two modes
• Transmit mode- Transmits the list of channels
  that are allocated for each BTS to NMC interface
  in Performance Manager
• Receive mode Receives alarm from the
  performance manager and stores them into MIB

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The Network Management Center

• The Management Information Base(MIB)
• The Management Information Base is a Relational
  Database which stores all the information.
• Each area has an Operator and a team of
  technicians.
• Each region consists of many areas and each
  region is managed by supervisor and all
  supervisors report one super user

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The MIB Structure
SUPER USER
SUPERVISOR1
SUPERVISOR2
SUPERVISOR3
Operater2
Operater1
Operater2
Operater1
Operater2
Operater1
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The MIB Organization
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The Network Management Center

• The Graphical User Interface
• NMC includes a Graphical User Interface
  containing a Geographic map of the network
  coverage area, with an overlay graphical
  presentation of the managed network elements and
  their Interconnections

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The Graphical User Interface

• Some advanced GUI interfaces in network
  management systems have the following features
• Changing the color of the network element based
  on severity of the alarm
• Blinking occurs when the network element has some
  emergency
• Clicking on the network element gives the real
  time information about the element configuration
  and pending alarms

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The Graphical user interface
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Conclusion

• The signal Monitoring system improves the
  reliability and the quality of service of a
  wireless network by efficient failure detection
  and location.
• It also improves the Overall network coverage and
  availability of network resources.

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References

• Jelena Vucetic, paul Kline signal Monitoring
  system, IEEE Dynamic Telecommunications 1998
• S. M. Dauber Finding Fault, BYTE Magazine,
  McGraw-Hill, Inc. New York, NY, March 1991
• 0. Wolfson, S. Sengupta, Y. Yemini Managing
  Communication
• Networks by Monitoring Databases, IEEE
  Transactions on Software
• Engineering m Vol. 17, No. 9, September 1991
• L. Feldkhun Integrated Network Management
  Systems, Proceedings First International
  Symposium on Integrated Network Management, 1989

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Questions

• What are the Advantages of the Fault Management
  system?
• Ans improves the reliability and the quality of
  service of a wireless network.
• What are the system design Considerations to be
  considered to while designing the Monitoring
  management system?
• Ans No. of Scanners and the locations where
  they should be placed. For the cost to be minimum
  the no. of scanners should be less.
• How does this fault management system improve
  reliability and Network coverage?
• Ans Efficient failure detection and also the
  location of the failure.