隨著多元智慧型設備(如智慧型手機、筆記型電腦與平板電腦)的迅速普及，以及高效能行動網路之導入，行動寬頻市場之接受度持續快速提升中。已有越來越多的智慧型手機用戶，會在移動狀態中使用各式各樣應用及網際網路服務，預計未來十年內資訊流量將成長近百倍。 然而面對行動數據傳輸量的暴增，如何利用small-cell進行行動數據傳輸量的分流，是目前全球所有電信營運商及行動網路設備供應商所面臨的一大課題。若毫無篩選規劃的廣泛建置small-cell將耗費龐大的建置維護成本(包含設備、電路、人力及維運等支出)，卻無法得到與投入成本相對應的行動數據傳輸量分流效益。 於本研究中，我們將建立一個small-cell覓點模型來有效找出真正需要分流行動數據傳輸量的地點來建置small-cell。由2010年Informa的統計資料可知，行動數據來源有住家屋內、辦公場所、交通運輸據點及公眾開放空間等四大部分。因交通運輸據點及公眾開放空間有直接較明顯的目標地點，如何精準找出住家及辦公場所亟需分流的地點為本論文研究之重點。 最後我們透過實驗並以off-load、throughput、建置成本及選點準確率等指標，驗證本研究所建立之small-cell覓點模型確實可有效找出需要分流行動數據傳輸量的地點。

Abstract - Mobile devices in the near future will need to collaborate to fulfill their function. Collaboration will be done by communication. We use a real world example of robotic soccer to come up with the necessary structures required for robotic communication. A review of related work is done and it is found no examples come close to providing a RANET. The robotic ad hoc network (RANET) we suggest uses existing structures pulled from the areas of wireless networks, peer to peer and software life-cycle management. Gaps are found in the existing structures so we describe how to extend some structures to satisfy the design. The RANET design supports robot cooperation by exchanging messages, discovering needed skills that other robots on the network may possess and the transfer of these skills. The network is built on top of a Bluetooth wireless network and uses JXTA to communicate and transfer skills. OSGi bundles form the skills that can be transferred. To test the nal design a reference implementation is done. Deficiencies in some third party software is found, specifically JXTA and JamVM and GNU Classpath. Lastly we look at how to fix the deciencies by porting the JXTA C implementation to the target robotic platform and potentially eliminating the TCP/IP layer, using UDP instead of TCP or using an adaptive TCP/IP stack. We also propose a future areas of investigation; how to seed the configuration for the Personal area network (PAN) Bluetooth protocol extension so a Bluetooth TCP/IP link is more quickly formed and using the STP to allow multi-hop messaging and transfer of skills.

Ultra wideband (UWB) communications has been a subject of much discussion over the last decade. The method of UWB has had a hard time to establish itself among other methods such as Bluetooth and WiFi but as internet of things (IoT) gains a foothold in our daily lives, UWB has presented some new application areas. These application areas are, among other things, self driving cars, energy efficient data transfer, health care applications, sensor networks and real time location systems. This project aims to use UWB communications to real-world applications, specifically, electrocardiography (ECG) - an application in health care in this project, and develop a prototype for the application. The prototype consists of two Android smart phones and two UWB modules (EVK1000 evaluation kits from DecaWave, Inc). Each smartphone connects a UWB module so that the two smart phones, one as sender and the other as receiver, can communicate directly through UWB radios. This is intended to serve as a proof-of-concept that UWB devices are well suited for short range data transfer applications. The result achieved by the project is an android application along with sending and receiving programs for the development boards by Decawave and additional information regarding UWB and its uses. The results also include a comparison of UWB, Bluetooth and WiFi as of todays standard. The goal of the project is to learn how android applications are programmed, how UWB is used in todays technology and how to program and use development boards presented by companies. The prototype has been built and shown that 12-lead simulated ECGsignals from the sender can be transfered to the receiver through the UWB communications. The work includes programming (in C) the two UWB modules for UWB communications, and Java for the android applications (programs) on the smart phones. The Android application is handling transmission of ECG signals to the sending UWB module and then receiving them from the receiving UWB module as well as displaying them on the receiver. The future work to continue the present project is to replace the sending smart phone by an ECG device that sends real ECG signals.

The purpose of this work is to design and implement a device for collecting temperature and humidity from bee hive. The system consists of a measuring unit that contains digital sensors and actuators.The system transmits the measured values wirelessly to the parent unit, which displays the data in a suitable format to the user. The user can monitor the hive parameters and use the actuators to adjust the temperature inside the hive. The whole system then operates autonomously according to defined rules.

The object of this thesis is an analysis of the possibilities of a wireless communication and a sensor‘s equipment for a four legged walking robot. The thesis is divided into three parts. In the first part there is a particular sale’s exploration in the section of the wireless communication modules. It refers to the differences among technologies in the methods of signal transmission, the technical parameters but also in the communication protocols. The next part of this thesis is focused on sensor’s equipment with the accent on the possibility of use for a four legged walking robot. It contains a short listing of sensors, which are available in the Czech Republic with division based on the type of sensing magnitude. These two parts make a base for the last part where I have chosen suitable communication modules along with sensors and realization wireless data transfer including control and visualization. The result of this thesis is the complete communication block from the user to the robot.

This master's thesis deals with wireless networks, mainly about the WiFi. It deals with summary of individual security mechanism both theoretically and using them in real hardware. Mainly it is interested in the security of the individual mechanisms and their weaknesses, which cause rupture of security. At each chapter the ideas and methods, that the attackers are trying for infiltration of wireless networks and decrypt encryption WEP, WPA or WPA2, are outlined. The principle of the authentication of the WiFi by the authentication server and its options, which is connected with directory service LDAP, is also explained in this thesis. The penultimate chapter deals with the summary of security mechanisms and references that should be adhered by design of the WiFi for the provision of the high security. The ending of the master's thesis is devoted to social engineering and its most famous representatives.

This diploma thesis deals with the design of temperature sensor and display units, which communicate via a WLAN network. The theoretical part provides an overview of various methods of temperature measurement including several specific types of temperature sensors, and also introduces the WLAN standard as well as TCP and UDP protocols. The design solution is focuses first on the system architecture and design of the communication protocol, followed by the implementation of both types of equipment, starting with selection of components, through design diagrams and printed circuit board patterns, up to production and commissioning. The following parts of this thesis deal with the design of programs for the controlling microcontroller units of both units and the configuration application for PC.

My thesis will be aimed at problems of wireless networks WiFi and WiMAX. A modelling of network will be put into effect onto which the measurement will be implemented and the impacts of network load on the data transfer Quality of Service (QoS) will be examined with aiming at VoIP. On this network model a power failure will be simulated and the impacts of this failure after restoring the power supply will be monitored. The aim of this thesis is to check the rate of network throughput while preserving a providing service quality and to suggest an economica1ly acceptable solution of the problems relating to feeding tension outage of the access point (AP) for a practical usage in these networks.

Masters thessis deals with the problematics of wireless signal propagation modeling inside buildings. The theoretical part of this thessis describes principles and methods of electromagnetic waves spreading in open areas and in indoor deployment. There are also described methods used for calculating the path of signal propagation ray-launching and ray-tracing. This part also includes description of an algorithm and equations used for simulating 5GHz WiFi signal propagation inside the Department of telecommunications corridors. Second part of this thessis includes a description of a NS-3 module mmWave, which was used for simulations of IEEE 802.11ad (WiGig) standard. There are also results of these simulations and their detailed description. At the end of this thessis comparison of these results with values gained by real environment measurements can be found.

L’Internet a été initialement conçu pour servir des usages fixes et sédentaires, cependant les projections montrent que les futurs utilisateurs d'Internet seront de plus en plus mobiles. A l'heure actuelle, la rapidité avec laquelle cette évolution se déroule et la gestion souvent insuffisante des réseaux d'accès représentent un obstacle majeur au développement de services avancés. Afin de résoudre ces problèmes et répondre aux besoins de l'Internet mobile, les fournisseurs de services ont besoin de maîtriser l'expansion de la capacité nécessaire dans leurs réseaux de collecte, sinon le trafic de donnés va pouvoir boucher leurs réseaux dans le futur. Le déploiement des nouvelles générations de réseaux fournit des hautes bandes passantes et débits mais implique souvent des grandes dépenses en capital et en exploitation. Une alternative économiquement et techniquement viable est représentée par les solutions de déchargement du trafic mobile. Ces solutions peuvent réduire la surcharge sur le spectre radio et sur les stations de base et sur le réseau de collecte. Les solutions de déchargement les plus couramment utilisées sont le déchargement sur les réseaux de femtocellules et les réseaux Wi-Fi. Dans le même contexte, pour résoudre le problème de congestion dans le réseau cellulaire, une nouvelle solution est récemment apparue: Information Centric networking permettant la mise en cache des contenus dans le réseau ce qui minimise le temps d'accès aux contenus. L'objectif de cette thèse est donc d'étudier ces nouvelles solutions de déchargement de trafic et de contenu dans les réseaux cellulaires en prenant en considération les schémas de mobilité et les comportements humains. / The Internet was initially conceived to serve fix and sedentary usages, while current socio-technological trends clearly show that future Internet users will be increasingly mobile and nomadic. At present, the speed at which this evolution takes place and the inadequate management of access networks represent a major obstacle in the development of advanced services. To solve these problems and to meet the needs of mobile Internet, service providers need to master the needed capacity expansion in their backhauling network, otherwise the data traffic will clog their networks in the future. Next-generation network deployments promise to deliver higher bandwidth and speed, but they often imply high capital and operational expenditures. An alternative economically and technically viable way is represented by mobile data offloading solutions. These solutions can reduce the load on radio spectrum, on base stations and on backhauling network. The most commonly used offloading solutions are over small-networks and over Wi-Fi networks. In the same context, and in order to solve the problem of congestion in the cellular network, a new solution has emerged recently : Information Centric Networking for in-network caching that permits to minimize content access latency. The objective of this thesis is to study these new traffic and content offloading solutions in cellular networks while taking into account the mobility patterns and human behavior.