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이종무선 네트워크 환경에서 서비스 품질 기반 다중연결 선택기법
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 김재현 | - |
| dc.contributor.author | Kang Shin-Hun | - |
| dc.date.accessioned | 2018-11-08T08:22:13Z | - |
| dc.date.available | 2018-11-08T08:22:13Z | - |
| dc.date.issued | 2015-02 | - |
| dc.identifier.other | 19476 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/13219 | - |
| dc.description | 학위논문(박사)--아주대학교 일반대학원 :전자공학과,2015. 2 | - |
| dc.description.tableofcontents | Abstract Contents List of Tables List of Figures List of Abbreviations Chapter 1. Introduction 1 1.1 Background and Motivation 1 1.2 Mobility Management Between a Macrocell and a Small Cell 3 1.3 Multi-connection Selection 5 1.4 Contributions 5 1.5 Overview 7 Chapter 2. RelatedWork 8 2.1 Scanning Overhead Reduction 8 2.2 Mobile Traffic Offload 9 2.3 Multi-connection Aggregation 10 2.4 Multi-connection Selection 11 2.5 Multi-connections in Specifications of 3GPP LTE 12 2.5.1 Access Network Discovery and Selection Function (ANDSF) 13 2.5.2 Inter-System Mobility Policy (ISMP) 14 2.5.3 Inter-System Routing Policy (ISRP) 18 2.5.4 Inter-APN Routing Policy (IARP) 21 2.5.5 WLAN Selection Policy (WLANSP) 21 2.5.6 Dual Connectivity in Small Cells 22 2.6 Network Architecture 25 2.6.1 Network Architecture for Interworking 25 2.6.2 Network Architecture for Tra_x000E_c Split 27 Chapter 3. Selective Scanning Scheme for Small Cells 28 3.1 Small Cell Scanning Overhead Problem 28 3.1.1 Femtocell scanning in IEEE 802.16 28 3.1.2 Inter-frequency small cell discovery in 3GPP LTE 32 3.2 Proposed Scanning Scheme for OSG Femtocells in IEEE 802.16 34 3.3 Proposed Scanning Scheme for Inter-Frequency Small Cells in 3GPP LTE 36 3.4 Performance Evaluation for IEEE 802.16 38 3.4.1 The Control Message Overhead 39 3.4.2 Scan Duration 40 3.5 Performance Evaluation for 3GPP LTE 46 3.5.1 Simulation Assumptions 46 3.5.2 Simulation Results 50 3.6 Summary 51 Chapter 4. Mobile Traffic Offload Decision 52 4.1 Background and Motivation 52 4.2 Three-Stage Offloading Algorithm 53 4.2.1 Stage 0 53 4.2.2 Stage 1 54 4.2.3 Stage 2 54 4.3 Performance Evaluation 58 4.4 Summary 66 Chapter 5. Multi-access Selection for a Single Service 67 5.1 Problem Statement 67 5.2 Multi-path Transmission 68 5.2.1 Diversity 68 5.2.2 Multiplexing 71 5.2.3 Hybrid 72 5.3 Proposed Multi-access Selection Scheme 73 5.3.1 Required Bandwidth 73 5.3.2 Multi-access Selection 77 5.4 Multi-access Selection Scheme for Multiple Services 79 5.5 Performance Evaluation 80 5.5.1 Simulation Environment 81 5.5.2 Simulation Scenarios 81 5.5.3 Packet Loss 84 5.5.4 Total Received Bytes 87 5.5.5 Cost and Energy Consumption 92 5.6 Summary 101 Chapter 6. Conclusion 102 References 104 Summary (in Korean) 115 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | 이종무선 네트워크 환경에서 서비스 품질 기반 다중연결 선택기법 | - |
| dc.title.alternative | Shin-Hun Kang | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | Shin-Hun Kang | - |
| dc.contributor.department | 일반대학원 전자공학과 | - |
| dc.date.awarded | 2015. 2 | - |
| dc.description.degree | Doctoral | - |
| dc.identifier.localId | 695798 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000019476 | - |
| dc.subject.keyword | 다중연결 | - |
| dc.description.alternativeAbstract | Heterogeneous wireless networks are deployed to handle growing mobile data traffic and to enhance the indoor service quality. Mobility management to improve quality of service (QoS) and user satisfaction in heterogeneous wireless networks is studied in this dissertation. Since there are many different radio access technologies (RATs) and small cells in heterogeneous wireless environments, efficient network discovery and seamless handover are essential for mobility management. Thus, efficient scanning and offloading schemes for small cells are proposed in this dissertation. Additionally, a multi-connection selection scheme is proposed to take advantage of multiple concurrent transmissions over different networks. Small cell is considered a promising solution for indoor service enhancement. However, the conventional scanning scheme is not suitable to be directly employed for scanning small cells in terms of efficiency and scan duration. Therefore, efficient scanning schemes for small cells are proposed. The proposed schemes can achieve a lower scanning overhead by reducing the number of small cells needed to be scanned. The evaluation results show that the proposed scanning schemes can reduce the control message overhead, scan duration, and energy consumption. Mobile network operators can reduce traffic traversing mobile core networks through offload technology. As a result, additional deployment of network elements to handle excessive traffic can be reduced. Meanwhile, users can obtain benefits from reduced propagation delay, which improves user experience. The three-stage offloading algorithm is proposed, and the simulation results show that the proposed scheme can select bearers to offload according to the utilization of networks and the user's preferences. Consequently, the cost of all bearers can be equalized, or delay can be reduced, or signaling overhead and complexity can be reduced in accordance with the user preferences. Mobile terminals equipped with multiple wireless interfaces can achieve better QoS by combining transmissions over several RATs. Network selection plays a key role in such a scenario. A multi-connection selection scheme that considers the characteristics of each RAT and the QoS requirements is presented. The required bandwidth is introduced as a new network selection criterion in the proposed scheme. User preferences are also considered, since each RAT has different properties such as access cost, energy consumption, and data rate. In addition, multi-connection selection schemes for multiple services are proposed and evaluated. The evaluation results show that the proposed scheme performs better than conventional signal strength-based selection schemes. | - |
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- Graduate School of Ajou University > Department of Electronic Engineering > 4. Theses(Ph.D)
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