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Transcript Customer Presentation 

UMass Update
Meeting
01/07/2016
Simulation Scenario
Category
Application layer
In-network caching
Access
Node layout
Consumer application
Transport layer
Parameter
Content size
Data payload
CS size
Propagation model
Protocol
Channel capacity
Rx sensitivity
Tx power
Line
Mobility
Constant bit rate
UDP, NDN
TCP
Value
1000 packets
1040 bytes
No caching
Friis
IEEE 802.11b DSSS
1 Mbps
- 80 dBm
5 dBm
5 nodes
Fixed (no mobility)
10 request per second
OnOff application
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Comparison between NDN, OLSR-UDP,
and OLSR-TCP
*
See next slide
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π‘Ÿπ‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘π‘ 
(See comment on
the bottom left
for details)
*
FlowMonitor metrics:
delaySUM: metric that sums up all delay values
rxPackets: number of received packets
Reference: http://telecom.inesctec.pt/~gjc/flowmon-presentation.pdf
*
*
* packet loss
3
TCP throughput for 12-node case
4
NS-3 Flow Monitor Module
β€’ Measure the performance of network protocols
β€’ Probes are installed in network nodes to track packet
exchange
β€’ Packets are divided according to the flow they belong to,
where each flow is defined according to the probe’s
characteristics (e.g., for IP, a flow is defined as the packets
with the same protocol, source and destination IP addresses
and Ports)
Reference: https://www.nsnam.org/docs/models/html/flow-monitor.html
5
Graphing TCP flows
For two nodes case
π‘‡β„Žπ‘Ÿπ‘œπ‘’π‘”β„Žπ‘π‘’π‘‘ 𝑏𝑝𝑠 =
8 × π‘‘π‘₯𝐡𝑦𝑑𝑒𝑠
π‘‘π‘–π‘šπ‘’πΏπ‘Žπ‘ π‘‘π‘‡π‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘ βˆ’ π‘‘π‘–π‘šπ‘’πΉπ‘–π‘Ÿπ‘ π‘‘π‘‡π‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘
Reference: http://telecom.inesctec.pt/~gjc/flowmon-presentation.pdf
π·π‘’π‘™π‘Žπ‘¦ = π‘‘π‘–π‘šπ‘’πΏπ‘Žπ‘ π‘‘π‘…π‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘ βˆ’ π‘‘π‘–π‘šπ‘’πΏπ‘Žπ‘ π‘‘π‘‡π‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘
6
[Updated from last meeting]
Comparison between NDN and OLSR-UDP
* Number of lost packets
296
*
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π‘‘π‘’π‘™π‘Žπ‘¦π‘†π‘ˆπ‘€
π‘Ÿπ‘₯π‘ƒπ‘Žπ‘π‘˜π‘’π‘‘π‘ 
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