The document proposes a new time synchronization scheme called Mobi-Sync for mobile underwater sensor networks. Existing schemes cannot account for long propagation delays and node mobility in underwater networks. Mobi-Sync estimates propagation delays more accurately by utilizing the spatial correlation between neighboring node mobility patterns. It involves three phases: delay estimation, linear regression, and calibration. Simulation results show Mobi-Sync has better accuracy and energy efficiency than existing approaches.

1. Mobi - Sync: Efficient TimeMobi - Sync: Efficient Time
synchronization For Mobile Underwatersynchronization For Mobile Underwater
Sensor Networks.Sensor Networks.
Anusha. Vardhineni

2. Mobi - Sync: Efficient TimeMobi - Sync: Efficient Time
synchronization For Mobile Underwater Sensorsynchronization For Mobile Underwater Sensor
Networks.Networks.
 ABSTRACT.
 EXISTING SYSTEM AND ITS LIMITATIONS.
 PROPOSED SYSTEM.
 ADVANTAGES OF PROPOSED SYSTEM.
 MODULES.
 SYSTEM REQUIREMENT SPECIFICATIONS.

3. ABSTRACT:ABSTRACT:
The main aim of the project Mobi-Sync is to achieve time
synchronization for mobile underwater sensor networks. Mobi-Sync
distinguishes itself from previous approaches for terrestrial WSN by
considering spatial correlation among the mobility patterns of neighboring
UWSNs nodes.
Time synchronization is an important requirement for the services
provided by distributed networks.
A lot of time synchronization protocols have been proposed for
terrestrial WSNs. However, none of them can be directly applied to
UWSNs.
A synchronization algorithm for UWSNs must consider additional
factors such as long propagation delays from the use of acoustic
communication and sensor node mobility.
Mobi-Sync accurately estimates the long dynamic propagation delays.
Simulation results show that Mobi-Sync outperforms existing schemes in
both accuracy and energy efficiency.

4. Limitations of existing system:Limitations of existing system:
In Existing system the time synchronization is a critical problem in any sensor
networks.
The most commonly used Medium Access Control protocols, often requires
nodes to be synchronized.
A lot of time synchronization protocols have been proposed for terrestrial
WSNs. However, none of them can be directly applied to UWSNs.
A synchronization algorithm for UWSNs must consider additional factors such
as long propagation delays from the use of acoustic communication and sensor
node mobility.
These unique challenges make the accuracy of synchronization procedures for
UWSNs even more critical.

5. Proposed systems:Proposed systems:
 To overcome the limitations of existing system Mobi-Sync
proposes a high energy efficient time synchronization
scheme specifically designed for mobile UWSNs.
 The distinguishing attribute of Mobi-Sync is how it utilizes
information about the spatial correlation of mobile sensor
nodes to estimate the long dynamic propagation delays
among nodes.
 The time synchronization procedure consists of three
phases:
Delay estimation
Linear regression, and
Calibration.

6. ADVANTAGESADVANTAGES::
Low communication bandwidth
Long propagation delays, and
Sensor node mobility.

7. SYSTEM REQUIREMENTS SPECIFICATION:SYSTEM REQUIREMENTS SPECIFICATION:
Hardware Requirements:Hardware Requirements:
•Processor : Intel Pentium
• RAM : 128MB
• ROM : 100MB Free Hard disk space
• Network interface card or Modem (For Remote Sources)
Software Requirements:Software Requirements:
•Operating system : WINDOWS XP
• Front end : ASP.net
• Tools : Visual Studio .Net 2008
(Visual Studio .Net Framework 2.0)
 Back end : SQL Server 2005 Edition