Most of the IP mobility management schemes based on the IETF's MIPv6 may not be suitable for delay-sensitive vehicular applications since there will be frequent service disruptions as the moving vehicles frequently change their points of wireless network attachment. This paper presents a fast IP mobility management scheme for vehicular networks where multiple wireless network interfaces are used to perform fast handovers without handover latency or packet loss. In order to do this, the IETF standard HMIPv6 has been extended, where multiple simultaneous tunnels between the HMIPv6 mobility anchor point (MAP) and the mobile gateway are dynamically constructed. We have designed the architecture for a mobile gateway for supporting multiple tunnels, the structure of the extension MAP (E-MAP), and the signaling procedure to achieve fast IP handover in vehicular networks. Both mathematical analysis and simulation have been done for performance evaluation. The results show that the proposed scheme is superior to HMIPv6 and MIPv6 with regard to handover latency and packet loss as the vehicle moves between different wireless network cells at high speed.

Precise localization of the Wi-Fi Access Point (AP) is becoming increasingly important with the rise of diverse location-based and smart phone-based services. In this article, we propose a new method for precise Wi-Fi AP localization using GPS information of a smart phone. The idea is that the possible area of Wi-Fi AP location, termed AP_Area, is first determined by measuring GPS information and the received signal strength of smart phones. As the number of measurements from users' smart phones increases, the AP_Area is successively narrowed down to the true AP location. Simulation shows the proposed algorithm can detect the Wi-Fi AP's localization within 5 m (probability exceeds 90%).

This paper describes a CMOS transponder IC for RFID applications. A full-wave rectifier implemented using NMOS transistors supplies the transponder with a dc supply voltage. A 64-bit ROM has been designed for a data memory. Front-end impedance modulation and Manchester coding are used for transmitting the data from the transponder memory to the reader. A new damping circuit has been proposed and employed for impedance modulation. The designed circuit has been fabricated using a 0.65 µm 2-poly, 2-metal CMOS process. Measurement results show that it has a constant damping rate of around 20-25% and a data transmission rate of 3.9 kbps at a 125 kHz RF carrier. Die area is 0.9 mm0.4 mm. The measured reading distance is up to 7 cm.

In this paper, we design and implement a Web-based Internet/Intranet service management system which can support Quality of Service (QoS) contracted by users and service providers, using Service Level Agreement (SLA) concept. We have analyzed the requirements and management information for Internet/Intranet service management. Based on this analysis, we have defined the suitable QoS parameters for the management of Internet/Intranet services, and developed new WWW service Management Information Bases (MIBs) for QoS management by extending the existing IETF's MIBs. The support of QoS management is done by incorporating the SLA concept, which is measured, monitored and controlled systematically in a multi-domain environment. Finally, we have built a prototype system, and evaluated its performance. The prototype system utilizes Java and CORBA technologies, so that various benefits of these technologies such as platform independence and scalability can be obtained.

Up to now, a lot of efforts have been made for the management of telecommunication networks and equipment, but less effort has been made for the realization of higher-layer service and business management. Common Object Request Broker Architecture (CORBA) provides the infrastructure for interoperability of various object-oriented management applications in a distributed environment, and being widely used to develop distributed systems in many areas of information processing technologies. There are recently worldwide growing interests for applying CORBA technology for the realization of higher layer Telecommunication Management Network (TMN) management functions. In this paper, we propose a platform architecture for the efficient integration of CORBA technology within TMN framework, where CORBA-based management functions as well as TMN-based management functions can be realized efficiently. GDMO/ASN. 1 to IDL translator has been designed and implemented for translating TMN management information into OMG CORBA IDL interface. The CORBA/CMIP gateway has also been designed for realization of the interaction translation specification of JIDM task force with some additional extensions. Finally, we evaluate the performance of the CORBA-based network management system, and analyze the code reusability for the construction of the CORBA-based management system, in order to show the efficiency of the architecture.

This letter introduces a cost-effective chrominance compensation scheme. The proposed method is applied to both 'INTER 1616' and 'SKIP' modes in only anchor P-pictures. By testing using JVT common test condition, simulation results show that proposed method can obtain average BD-PSNR gains for U and V as 0.14 dB and 0.13 dB, respectively while maintaining almost the same BD-PSNR's for Y. For the range of low bit-rate, it is observed that average BD-PSNR gains for Y, U and V are 0.14 dB, 0.49 dB and 0.53 dB, respectively. Necessary computational complexity is very marginal because the number of anchor P-pictures is very small in comparison with whole coded video sequences. However it can be found that the proposed method can significantly improve the coding efficiencies of color components.

As enterprises use ATM networks for their private networks and as these private networks use public ATM networks for wide area communication, the need for the customers to be able to manage both private and public networks is increasing. Currently, some standardization work is being done towards providing this capability to customers. In this paper, we propose a new customer network management (CNM) system architecture for the management of both private and public ATM networks in a uniform way. The particular features of the proposed architecture lies in the efficient support of the complex hierarchical TMN manager-agent relationships at M3 and M4 interfaces, and the support of SNMP and CMIP integration. The TMN hierarchical many-to-many manager-agent relationships are realized by the utilization of a CORBA-based Shared Management Knowledge (SMK) system. We have implemented a prototype of ATM CNM system, and measured the performance for the demonstration of the suitability of the proposed architecture.