Service Migration Mechanism and Data Aggregation Schemes for Enhanced Mobility Service in Wireless Sensor Networks
- 주제(키워드) Service Migration , Data Aggregation , Mobility Service , Wireless Sensor Network
- 발행기관 고려대학교 대학원
- 지도교수 안순신
- 발행년도 2010
- 학위수여년월 2010. 8
- 학위구분 박사
- 학과 일반대학원 전자컴퓨터공학과
- 세부전공 컴퓨터 및 정보처리네트워크
- 원문페이지 112 p
- 실제URI http://www.dcollection.net/handler/korea/000000023582
- 본문언어 영어
- 제출원본 000045609972
초록/요약
A wireless sensor network consists of many micro-sensor nodes distributed throughout an area of interest. Each node has a limited energy supply and generates information that needs to be communicated to a sink node. The basic operation in such a network is the systematic gathering and transmission of sensed data to a sink node for further processing. During the data gathering process, sensors have the ability to perform in-network aggregation of the routes the data packets take to the sink node. The lifetime of such a sensor system can be defined as the time during which the sensor information is gathered from all of the sensors and combined at the sink node. Given the location of the sensors, the sink node and the available energy at each sensor, the main interest is to find an efficient manner in which the data can be collected from the sensors and transmitted to the sink node, so as to maximize the system lifetime. We describe a zone based data transmission and data aggregation scheduling scheme for the purpose of maximizing the network lifetime. Also, we propose an emergent data processing scheme to improve the reliability of the sensing data. The experimental results demonstrate that the proposed protocol significantly outperforms the other data aggregation protocols in terms of the energy saving and system lifetime. And Ubiquitous Sensor Networks(USN) have a different architecture from previous wired and wireless networks. Also, services in USN must be provided in a discriminate manner. In order to support service migration in USN, it is necessary to make a new architecture. In this paper, we present a service framework for user and service mobility in USN whose goal is to create a different service providing method. Therefore, we propose two new concepts. One is the ubiquitous sensor networks service gateway architecture for effective service management in ubiquitous sensor networks. This is located on an access node to offer transparently stable and efficient service to the user. The other is a new mechanism designed to support service migration and user mobility effectively based on ubiquitous sensor networks. Service migration in ubiquitous environments involves the mobility of a tagged user moving from one location to another. The VHE+ framework is proposed to support such service mobility.
more목차
Chapter 1. Introduction 1
1.1 Zone based Data Transmission & Aggregation Scheme 1
1.2 Service Migration Scheme 3
1.3 Organization of the dissertation 5
Chapter 2. Related Work 6
2.1 Service Oriented Architecture & Migration Scheme 6
2.1.1 Service Oriented Architecture 6
2.1.2 Service Migration using Mobile IP Scheme 12
Chapter 3. Data Aggregation and Transmission Scheme 18
3.1 System Model 18
3.1.1 Network Model 19
3.1.2 Self-Organization of Zone 20
3.1.3 Energy Consumption Model 23
3.2 Data Aggregation Scheduling Scheme 26
3.2.1 Zone based Data Transmission Scheduling Algorithm 27
3.2.2 Zone based Data Aggregation Scheduling Algorithm 35
3.2.3 Emergent Data Processing 39
3.3 Performance Evaluation 45
3.3.1 Experimental Results 46
Chapter 4. Service Migration Mechanism 49
4.1 Definition 49
4.1.1 Ubiquitous Computing/Network Environments 49
4.1.2 Service Migration under Ubiquitous Environments 50
4.1.3 Service Categories in Ubiquitous Sensor Networks 52
4.2 Inter-Working Function 54
4.2.1 Network Architecture 54
4.2.2 Sensor Network Service Gateway 56
4.2.3 Core Service Part 58
4.3 Virtual Home Environment 63
4.3.1 Virtual Home Environment(VHE+) 63
4.4 Security Policies 67
4.4.1 Overview of Security considerations for Service Mobility under Ubiquitous Sensor Network Environment 67
4.4.2 Security Policy 68
Chapter 5. Service Scenario and Implementation 71
5.1 Service Mobility Scenario 73
5.1.1 Simple Monitoring 73
5.1.2 Personal Picture Board 74
5.1.3 Personalization TV 75
5.2 Implementation of Test-bed 76
5.2.1 Network Architecture 76
5.2.2 Sensor Network Middleware 77
5.2.3 H/W Specification 84
Chapter 6. Conclusion 88
Bibliography 90
