Kai-Di Chang

Internet of Things and Cloud Computing for Future Internet

Currently, Internet of Things (IoT) and Cloud Computing are the hottest issues of Future Internet. The IoT is the most important concept of Future Internet for providing a common global IT Platform to combine seamless networks and networked things. Cloud Computing provides backend solution for processing huge data streams and computations while facing the challenges of everything will be connected with seamless networks in the future. However, there is a lack of common fabric for integrating IoT and Cloud. In telecommunications, the IMS (IP Multimedia Subsystem) based on the All-IP and Open Services Architecture has been regarded as the trend for Next Generation Network (NGN). We believe that the IMS communication platform is the most suitable fabric for integrating IoT and Cloud. In this study, we will provide the discussion of open challenges and possible solutions for Future Internet.

A Framework for IoT Objects Management Based on Future Internet IoT-IMS Communication Platform

In recent years, with the continuing growth and development in mobile communication technologies, the number of mobile devices and network connected equipment are increasing quickly. Objects/Things in daily life are given the capability to achieve environment sensing and network connectivity. Internet of Thing is the best usage and application of mobile computing and ubiquitous service. There are more and more possible applications while things can communicate with each other. However, there are lacks of rules or specifications for things naming. A framework for IoT object management and naming is proposed based on the future Internet IoT-IMS communication platform. The communications to Internet of Things (IoT) objects can be easily accomplished through the proposed IoT-IMS (IP Multimedia Subsystem) URI (Uniform Resource Identifier). The framework is implemented by integrating with previous future Internet IoT-IMS communication.

Advanced Path-Migration Mechanism for Enhancing Signaling Efficiency in IP Multimedia Subsystem

Since Internet Protocol (IP) is the most important protocol in Next Generation Networks (NGNs), 3rd Generation Partnership Project (3GPP) utilizes Session Initial Protocol (SIP) based on IP as the base protocol for negotiating sessions in IP Multimedia Subsystem (IMS). Different from traditional circuit-switched network, in IMS, the media traffic and signaling are delivered through IP transport. The media traffic may affect the signaling efficiency in core network, due to traffic collisions and best effort packets delivery. This paper proposes a novel path-migration mechanism for enhancing the traffic efficiency in integrated NGN-IMS. The simulation results show that the interference and traffic collision can be reduce by applying proposed path-migration mechanism and the signaling efficiency in core network can be improved with higher system capability and voice quality.

Towards Service-Oriented Cognitive Networks over IP Multimedia Subsystems

Cognitive Radio (CR) is an innovative wireless sensing technology which can improve efficiency of spectrum usage. Based on CR, Cognitive network (CN) further focus on end-to-end communications for the global optimization and policy enforcement. However, there is a lack of global control channel or middleware for cognitive optimization in CN environment. In this paper, we proposed a Cognitive IP Multimedia Subsystem framework called Cog IMS, which consists of benefits from CN and IP multimedia subsystem (IMS). In this framework, the cognitive optimization is modeled as a service over IMS architecture. By adopting the proposed service-oriented framework, the global optimization is simple to achieve under standardized architecture and the computation requirement is reduced from user to core network. Finally, we simulate wireless users who using services to compare Cog IMS with CN and IMS. The simulation results show that the proposed Cog IMS can achieve the optimization of wireless resource allocation with different network situations.

ScriptIoT: A Script Framework for and Internet-of-Things Applications

Following recent advances in sensing and wireless technologies, Internet-of-Things (IoT) applications are being exploited in various fields. The scale of IoT systems and the number of devices that they include has become huge, and the construction of IoT applications is, therefore, becoming increasingly challenging. This work proposes a script framework as a convenient development interface for service-oriented architecture (SOA) scheduling of web-based information of IoT applications, called ScriptIoT, which is composed of the IoT fundamental in case of all type of devices integration and a scriptable agent. Based on the IoT fundamental class, various IoT devices may be developed and the scriptable agent enables IoT applications to be configured using scripts. The proposed ScriptIoT framework, which offers both polling an event-driven mechanism for delegating IoT applications to the agent and reporting event of the specified device, contributes to large-scale applications. Experiments herein reveal that in the proposed ScriptIoT framework, the access time and CPU loading are slightly greater than those achieved using traditional C programming by 3% and 13%, respectively, but the proposed framework exhibits improved flexibility and scalability.

sPing: a user-centred debugging mechanism for software defined networks

Software defined networking (SDN) paradigm currently does not integrate with any debugging or diagnosing mechanism. Services through Internet connection may not work properly due to network problems, such as loop and black hole problems. The study introduces sPing, a user-centred debugging mechanism for users debugging and troubleshooting network problems in SDN. The sPing diagnoses problems in data plane by collecting and recording specific packets based on programmable capability. It not only detects network loop and black hole but also discovers the hidden information of data link layer. The discovery of layer 2 information is unachievable to existing SDN-based debuggers. The authors experiment the sPing on three different brands of SDN switches for verifying its proof of concept, and simulate it in the Mininet emulator for evaluating its performance. Results showed that the proposed sPing mechanism assists SDN users in debugging network problems and in maintaining network functionalities.

An efficient path-migration mechanism for IP Multimedia Subsystem

Due to Internet Protocol (IP) is the most important protocol in Next Generation Networks. 3GPP utilizes Session Initial Protocol (SIP) based on IP as the base protocol for negotiating sessions in IP Multimedia Subsystem (IMS). Different from traditional circuit-switched network, the media traffic and signaling are delivered through IP transport layer in IMS. The media traffic may affect the signaling efficiency in core network because the traffic collisions and delivery packets in best effort. This paper proposes a novel path-migration mechanism for enhancing the traffic efficiency in IMS. The simulation results show that by adopting proposed path-migration mechanism, the interference and traffic collision can be reduced and the signaling efficiency in core network can be improved.

Emergency service model analysis to heterogeneous network environment

In recent years, network communication has been a necessary part in daily life. However, there is a lake of emergency call or emergency process in current network communication environment. In order to overcome such situation, 3GPP proposes emergency communication system in Next Generation Networks, which is a part of service in IP Multimedia Subsystem. The queuing model is used to achieve the performance of emergency service in IMS. Finally, the delay time of our proposed model is analyzed.

Backup routing firewall mechanism in P2P environment

This paper will discuss the most important source in the peer-to-peer networking. The backup routing mechanism is used in the peer-to-peer networking to avoid the discontinue downloading file. Each node uses the single nose and the single connection as the downloading source in the peer-to-peer networking in current model. Any source disconnected would be replaced by others when there are multiple sources for requirement. One loses the connection and fails the downloading files one need. The new backup routing would improve the above condition.