Transcript Performance Management

Wireless Network Management
SANDEEP
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.
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Configuration Management
Performance Management
Fault Management
Accounting Management
Security Management
Network Management Architecture
Network Management
Configuration Management
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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
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SNMP software
Version 3.1
Performance Management
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Measures various aspects and make them available so
that the inter network performance can be maintained.
Network Management
Fault Management
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Detects network problems log them and automatically fix
them to keep the network running safely.
Accounting Management
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Measures Network Utilization parameters.
Security Management
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Controls unauthorized access to the network resources so
that the network is not sabotaged.
Wireless Network
A wireless network is a computer network in which
communication between machines occurs over a
wireless link.
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Cellular networks
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Satellite networks
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Iridium, Inmarsat, etc.
Battlefield networks
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Verizon, DoCoMo, etc.
Communication between tanks, soldiers, etc.
Wireless Local Area Networks (LAN)
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IEEE 802.11
IEEE 802.11 Overview
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Adopted in 1997.
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The Connectionless IEEE 802.11 local networks
define 2 topologies
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Infrastructure Network – connected through AP’s
Ad-Hoc Network – peer-to-peer communication
Overview, 802.11 Architecture
Infrastructure Network
Overview, 802.11 Architecture
Ad-Hoc Network
Setting Up a New Wireless
Network
Access Point
1.
2.
Discovery
Transfer of PIN
Registration
Securely
Protocol
New
AP
Connected
Settings
Registrar
3.
4.
Steps
Discovery of New
Access Point
Transfer of PIN
Registration Protocol
runs as EAP (Authentication)
method
New AP Settings sent
Setting Up a New Member Device
Access Point
Registration
Protocol Continues
Securely Connected
DiscoveryStart
(Authentic
ation) EAP
UPnP
Event UPnP
Reads PIN from
Enrollee
New
Enrollee
Notification
Registrar
Enrollee
Signal Monitoring System for
managing the wireless Network
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To Manage the wireless networks system a signal
monitoring system can be used.
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This system does not interfere with the regular
network operations.
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Listens
Measures
Sends alarms
System Architecture
NETWORK
MANAGEMENT CENTER
Cellular Network
PERFORMANCE
MANAGER
Scanning Receivers
Implementation of the
Management System
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There 2 high level versions of implementation
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Centralized Performance Manager
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Distributed Performance Manager
FAULT MANAGEMENT
SYSYTEM
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THE PERFORMANCE MANAGER
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THE NETWORK MANAGEMENT CENTER
The Performance Manager
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The Scanner Interface
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The Measurement Database
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The Alarms Generator
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The NMC Interface
Performance Manager
Structure
MEASUREMENT
DATABASE
SCANNER
INTERFACE
ALARM
GENERATOR
NMC
INTERFACE
The Performance Manager
The Scanner Interface
 Two Modes
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Transmit Mode – Downloads list of scanning channel
identifiers and sends them to the associated scanner for
measurements.
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Receive Mode – collects the measured data from the
scanners according to the list of channel identifiers
previously sent for measurement.
The Performance Manager
The Measurement Database
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It is a Relational Database that stores the
received data in the scanner interface
(receive mode)
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It consists of tables
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
The Performance Manager
The Alarm Generator
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If correlated results indicate poor coverage,
the alarm generator generates an alarm to
NMC and sends via NMC interface in
performance manager structure.
The Performance Manager
The Alarm Generator
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Alarm contains the following information
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BSC identifier
BST identifier
Faulty channel identifier
Alarm code
Alarm description
Scanner identifier
Scanner location
Timestamp
Alarm severity
The Performance Manager
The NMC Interface
 It enables communication between the
performance manager and the Network
Management center
 It has two modes
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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
The Network Management
Center
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The Performance Manager Interface
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The Management Information Base
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The Graphical User Interface
The Network Management Center
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The Performance Manager Interface
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Two modes
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Transmit mode- Transmits the list of channels
that are allocated for each BTS to NMC interface
in Performance Manager
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Receive mode – Receives alarm from the
performance manager and stores them into MIB
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
Operater1
Operater2
SUPERVISOR2
Operater1
Operater2
SUPERVISOR3
Operater1
Operater2
The MIB Organization
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
The Graphical User Interface
Some advanced GUI interfaces in
network management systems have
the following features
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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
The Graphical user interface
Conclusion
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The signal Monitoring system improves the
reliability and the quality of service of a
wireless network by efficient failure detection
and location.
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It also improves the Overall network coverage
and availability of network resources.
References
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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
Questions
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What are the Advantages of the Fault Management system?
Ans: improves the reliability and the quality of service of a wireless
network.
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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.
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How does this fault management system improve reliability and
Network coverage?
Ans: Efficient failure detection and also the location of the failure.