Changpeng Fan

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Multimedia operating systems must have real-time features and other supporting features in order to meet the QoS requirements of distributed multimedia applications. It is not enough to simply give communication processing activities higher priorities, it is necessary to realize a soft real-time framework which controls all system activities. In addition,(More)
The Proxy Mobile IPv6 (PMIPv6) is a network based mobility management protocol standard that was ratified recently by the Network-based Localized Mobility Management (NetLMM) working group of the Internet Engineering Task Force (IETF). PMIPv6 is a protocol that uses the same concepts as used in Mobile IPv6 (MIPv6), but modified to operate in the network(More)
Quality of Service (QoS) mechanisms in networks supporting mobile Internet communications give rise to Denial of Service (DoS) threats: if the network cannot efficiently check the credibility of a QoS request during a handover process, malicious entities could flood the network with bogus QoS requests; if the authentication check is performed by means of an(More)
Mobile communication networks need an overall holistic concept for their charging and billing processes, independently of the kinds of services in use. All usage data of a single service should finally be summarized in a single service-oriented complete bill, which shows the individual components of a service separately. In the case of handover among(More)
Quality of Service (QoS) mechanisms in networks supporting mobile Internet communications give rise to new threats: these mechanisms could be abused by malicious entities launching so-called Denial of Service (DoS) attacks. If the network can not efficiently check the credibility of a QoS-request during a handover process, malicious entities could flood the(More)
CODOSO is a combinative distributed operating system family, which serves as an integrated environment for building various distributed operating systems according to different application requirements. The basis of the CODOSO project is CLUSTER 86, a newly developed object-oriented programming language. CODOSO is designed in an object model based on the(More)