Download EMP: A Network Management Protocol for IP

EMP: A Network Management Protocol
for IP-Based Wireless Sensor Networks
2010 International Conference on
Communication in Wireless Environments and
Ubiquitous Systems: New Challenges (ICWUS)
Author : Shafique Ahmad Chaudhry, George
Boyle, Weiping Song, Cormac Sreenan
Speaker : Ya-Ling, Wang
Date : 2012/5/8
Outline
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Introduction
Related Work
System Model and Architecture
EmNetS Management Protocol(EMP)
SNMP Compliance and Lightweight MIB
Implementation
Preliminary Results
Conclusion
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Introduction
• Network management system
– Standard network management<->WSN applications
• The management of IP-WSN is different from just
WSNs as well as just from IP networks.
– IP-based WSN
• IP-like solutions but lighter weight
• Variety of services making it further complicated
• EmNetS Network Management Protocol
– SNMP-compliant IP-based WSN and Lightweight MIB
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Related Work
• Simple Network Management Protocol
– It can’t be deployed directly on the sensor
networks
• SNMP message overhead
• The problem of node-failure
• Requires huge Management Information Base (MIB)
• Sensor Network Management System
– Provides query based network health data
collection and event logging
• High memory usage
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System Model and Architecture
• The 6LoWPAN entities
• Network Discovery
– The device discovery is performed by the
coordinators
Gateway
– Hierarchy Transmit
– Only changes will Update
E
• ↓communication overhead
E
• ↑Network lifetime
– Network-wide snapshot
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C
E
C
C: Coordinator
E: End Device
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EmNetS Management Protocol(EMP)
• Network wide snapshot
– Manage the resources
• Get the network state from nodes
– Active probing, Periodic reports
• The accuracy of the state data
– Reporting interval, Network latency
Nowof network state
14:30 : EmpObjExpiry
14:30time
• Cache
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Expiry Time
5 min
– empObjExpiryTable
Last Update
14:15
– empObjUpdateTable
What to do
Get new
5 min
14:28
Get from Cache
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SNMP Compliance and Lightweight MIB
※OID: Object IDentifier
• Monitor devices within the WSNs
– It is impractical to transport SNMP over WSNs
• Inherent bandwidth limitations
• Management Information Base
– SNMP MIB is huge
– Designed a light-weight and simpler MIB for WSN
• Network : general and constant information
• Application : provides statistics
• Mote groups : deals with information specific to WSN
nodes
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Implementation
• The management station
– Runs on the gateway node
• Communication between IP and WSN networks
• Net-SNMP agent
– The EMP framework written in Java
• The agent component
– Tmote Sky sensor nodes with MSP430
microcontroller
– 10KB RAM and 48KB flash memory
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Query - Response Delay
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Management Traffic Overhead
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Query - Response Success
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Conclusion
• This paper present
– EMP, SNMP interoperable network
management framework for IP-WSNs
– Reduction of communication cost
– Implemented on real test
• Future work
– Optimization of network life
– Aggregation mechanics of EMP traffic
– Inference mechanisms
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