Thesis (M. Sc.)--University of Hong Kong, 2002. / Includes bibliographical references (leaves 86-90).

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

Wong Chung-Yu. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2002. / Includes bibliographical references (leaf 75). / Abstracts in English and Chinese. / Abstract --- p.ii / List of figures --- p.viii / List of tables --- p.ix / Chapter 1. --- BACKGROUND --- p.1 / Chapter 1.1 --- An analysis of manuals --- p.1 / Chapter 1.2 --- Existing practice --- p.5 / Chapter 1.3 --- New concept in dynamic manual --- p.7 / Chapter 1.3.1 --- Dynamic representation --- p.7 / Chapter 1.3.2 --- Machine-orientation --- p.8 / Chapter 2. --- DESIGN PHILOSOPHY --- p.10 / Chapter 2.1 --- Concept --- p.10 / Chapter 2.2 --- Data node --- p.12 / Chapter 2.3 --- Characteristic of function and operator --- p.14 / Chapter 2.4 --- Function hierarchy --- p.17 / Chapter 2.5 --- Manual-tree (conceptual and actual) --- p.18 / Chapter 2.6 --- Coding --- p.20 / Chapter 2.7 --- Operation sequence --- p.21 / Chapter 2.8 --- Parameter passing --- p.22 / Chapter 2.9 --- Manual-tree operation --- p.24 / Chapter 3. --- IMPLEMETATION OF DYNAMIC MANUAL SYSTEM --- p.25 / Chapter 3.1 --- Generator --- p.26 / Chapter 3.1.1 --- File format and generation --- p.26 / Chapter 3.2 --- Reader --- p.35 / Chapter 3.2.1 --- Guide service --- p.36 / Chapter 3.2.2 --- Button querying service --- p.37 / Chapter 3.2.3 --- Personal management service --- p.38 / Chapter 3.2.3.1 --- Insert --- p.38 / Chapter 3.2.3.2 --- Delete --- p.40 / Chapter 3.2.3.3 --- Swap --- p.40 / Chapter 3.3 --- The graphics --- p.42 / Chapter 4. --- EXPERIMENTS --- p.43 / Chapter 4.1 --- Experiment I (mobile phone) --- p.43 / Chapter 4.1.1 --- Data preparation --- p.43 / Chapter 4.1.2 --- Generating XML file --- p.46 / Chapter 4.1.3 --- Preparing multimedia material --- p.46 / Chapter 4.1.4 --- Design of Reader --- p.47 / Chapter 4.1.5 --- Testing --- p.51 / Chapter 4.1.5.1 --- Top-down search test --- p.51 / Chapter 4.1.5.2 --- Bottom-up search test --- p.52 / Chapter 4.1.5.3 --- function hierarchy modifying test --- p.53 / Chapter 4.2 --- Experiment II (pager) --- p.54 / Chapter 4.2.1 --- Data preparation --- p.54 / Chapter 4.2.2 --- Generating XML file --- p.54 / Chapter 4.2.3 --- Preparing multimedia material and the Reader --- p.56 / Chapter 4.2.4 --- Testing --- p.57 / Chapter 4.2.4.1 --- Top-down search test --- p.58 / Chapter 4.2.4.2 --- Bottom-up search test --- p.58 / Chapter 4.2.4.3 --- function hierarchy modifying test --- p.59 / Chapter 4.3 --- Control graphics constrain --- p.61 / Chapter 5. --- RESULTS --- p.65 / Chapter 5.1 --- Change of representation --- p.65 / Chapter 5.2 --- Storage and computation requirements --- p.70 / Chapter 6. --- CONCLUSION --- p.72 / References --- p.75 / Appendix A.1 input file of mobile phone (function part) --- p.76 / Appendix A.2 input file of mobile phone (operator part) --- p.96 / Appendix B.1 input file of pager (function part) --- p.105 / Appendix B.2 input file of pager (operator part) --- p.111 / Appendix C Function hierarchies and operator lists of the experiments --- p.113 / Appendix D Key words --- p.117

Next generation wireless systems have an IP-based infrastructure with the support of heterogeneous access technologies. One research challenge for next generation all-IP based wireless systems is to design intelligent mobility management techniques that take advantage of IP-based technologies to achieve global roaming between various access networks. To support global roaming, next generation wireless systems require the integration and interoperation of heterogeneous mobility management techniques. Mobility in a hierarchical structure or multilayered environment should be supported. The objective of this study is to develop new mobility management techniques for global roaming support in next generation all-IP based wireless systems. More specifically, new schemes for location management and paging in Mobile IP for network layer mobility support, and new schemes for location management and handoff management in heterogeneous overlay networks for link layer mobility support are proposed and evaluated. For network layer mobility support, a distributed and dynamic regional location management mechanism for Mobile IP is proposed. Under the proposed scheme, the signaling burden is evenly distributed and the regional network boundary is dynamically adjusted according to the up-to-date mobility and traffic load for each terminal. Next, a user independent paging scheme based on last-known location and mobility rate information for Mobile IP is proposed. The proposed scheme takes the aggregated behavior of all mobile users as the basis for paging. For link layer mobility support, an IP-based system architecture for the integration of heterogeneous mobility management techniques is proposed. Three location management schemes under this IP-based architecture are proposed. All the three schemes support user preference call delivery which is a very important feature of next generation wireless communications. A threshold-based enhancement method is also proposed to further improve the system performance. Finally, a hybrid resource allocation scheme for handoff management in wireless overlay networks is proposed. Under this scheme, the overall system resources can be optimally allocated when mobile users are covered by multiple overlay networks.