TABLE OF CONTENTS
CHAPTER CONTENTS PAGES
TITLE DECLARATION
DEDICATION ACKNOWLEDGEMENT
ABSTRAK ABSTRACT
i iii
viii ix
x viii
TABLE OF CONTENTS xii
LIST OF TABLES xiv
LIST OF FIGURES
xv
LIST OF ABBREVIATIONS
xvii
I INTRODUCTION
1
1.0 INTRODUCTION 1
1.1 PROBLEM STATEMENTS 2
1.2 OBJECTIVES 3
1.3 SIGNIFICANT 3
1.4 THESIS ORGANIZATION 4
II LITERATURE REVIEW
5
2.0 INTRODUCTION 5
2.1 WIRELESS LAN 5
2.2 WIRELESS MESH NETWORK 7
2.3 ELECTROMAGNETIC INTERFERENCE EMI 8
2.3.1 Source of CCI
2.3.2 Source of ACI 9
10 2.4 CCI AND ACI IN WLAN
11 2.5 CCI AND ACI IN WMN
11 2.6 CARRIER SENSING MECHANISM
12 2.7 SUMMARY
13
III RESEARCH METHODOLOGY
3.0 INTRODUCTION 14
14 3.1 EXPERIMENTAL SETUP
14 3.2 UNDERSTANDING RSSI MEASUREMENT
METHOD 16
3.3 UNDERSTANDING THROUGHPUT MESUREMENT METHOD
3.3.1 Non-Streaming Protocols 3.3.2 Streaming Protocols
17
17 18
3.4 SUMMARY 18
IV RESULT AND ANALYSIS
19
4.0 INTRODUCTION 19
4.1 MEASURED RSSI 19
4.2 MEASURED NON-STREAMING THROUGHPUT 22
4.3 MEASURED STREAMING THROUGHPUT 30
4.4 SUMMARY 38
V CONCLUSION AND RECOMMENDATION
39 5.0 CONCLUSION
5.1 RECOMMENDATION AND FUTURE WORK
REFERENCES
39 40
41
LIST OF TABLES
TABLE NO.
TITLE PAGES
4.1 RSSI S1 and S2 at R1
20 4.2
RSSI S1 and S2 at R2 21
4.3 Total Non Streaming Protocols Goodput
28 4.4
Total Streaming Protocols Goodput 34
4.5 Total Streaming Protocols Losses
36
LIST OF FIGURES
FIGURE NO.
TITLE PAGES
2.1 Ad hoc mode [3]
6 2.2
Infrastructure mode [3] 7
2.3 Wireless Mesh Network
8 2.4
Co Channel Interference [4] 9
2.5 Adjacent Channel Interference [5]
10 3.1
Network Model 15
4.1 RSSI S1 and S2 at R1
19 4.2
RSSI S1 and S2 at R2 21
4.3 HTTPtext Script
22 4.4
HTTPgif Script 23
4.5 HTTPS Script
23 4.6
FTPget Script 24
4.7 FTPput Script
24 4.8
POP3 Script 25
4.9 SMTP Script
25 4.10
Non Streaming Protocols sending DATA Behavior 26
4.11 Timing record
27 4.12
Non Streaming Goodput 28
4.13 Realaud Script
30 4.14
Realmed Script 30
4.15 iptva Script
31 4.16
iptvv Script 31
4.17 netmtga Script
32 4.18
netmtgv Script 32
4.19 netshowu Script
33 4.20
Streaming S1 and S2 34
4.21 S1 and S2 Streaming Protocols Losses
35
LIST OF ABBREVIATIONS
ACI Adjacent-Channel Interference
CSI Carrier Sensing Interference
CCI Co-Channel Interference
EMI Electromagnetic Interference
RSSI Received Signal Strength Indicator
SIR Signal to Interference Ratio
WLAN Wireless LAN
WMN Wireless Mesh Network
CHAPTER 1
INTRODUCTION
1.0 INTRODUCTION
Wireless mesh network WMN was believed to be one of the ways to extend wireless coverage. Other than that, it also used to provide good Internet connectivity
by using only one channel. By doing this, it actually reduce the cost of maintaining and deployment. Besides that, it also has the ability to heal the connection as when
the connection is broken or loss, it can find other route to stay connected [2]. However, there are some disadvantages in WMN. Since it uses only one channel to
connect with other routers, it can accidentally bring interference into the network. The interference can cause the performance of WMN to be decreased.
Carrier sensing is one of the network protocols that actually prevents the data from collision. The mechanism is to allow other nodes to transmit first rather than
transmitting at the same time. The carrier sensing method can be seen occurred in wireless mesh network where in this topology; the nodes must in range with each
other to make the connection. In this thesis, the analysis of how carrier sensing interference affecting the wireless mesh network is presented.
The thesis proposed that carrier sensing may affects wireless mesh network when there are more than one link involved. When talking about two links, there are
two senders that will transmit data and two receivers that will receive the data send
by the senders. However, these links are independent and supposedly the goodput received at the receivers should not be affected. This is where the mechanism of
carrier sensing can be seen. By analyzing the possibilities, it can form sixteen cases. The sixteen cases are actually been done with two bits of binary of carrier sensing
where 11 consist of both senders node are in range and can sense each other [1]. These bits followed by 10, 01 and 00. Other than that, these method also used to
highlight the Co-Channel Interference CCI occurred where 11 shows that the two receiver node are interfered by both senders and vice versa [1].
1.1 PROBLEM STATEMENT
