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IEEE Micro 10/2004; 24(5):7- 9. · 1.78 Impact Factor
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ABSTRACT: As the telecommunications industry recovers from the severe downturn of recent years, data traffic continues to exhibit a rate of increase that outpaces advances in VLSI technology. Therefore, lowering overall system cost at network processing nodes and maximizing network utilization - hence revenues - remain extremely important objectives. To address these issues, new semiconductor devices called network processing units (NPUs) have emerged. They are optimized to provide programmable processing of protocol data units (PDUs) in networks with diverse requirements while efficiently supporting current and emerging protocols and services. NPUs promise to deliver an ASICs speed with a CPU's programmability, thus augmenting the capacity and features of network nodes that forward and manipulate data traffic. The Programmable Protocol Processor (PRO3) system reduces the overhead incurred by common "BRUTE-FORCE" architectures by using the least-required hardware resources for certain common well-defined tasks.
IEEE Micro 10/2004; · 1.78 Impact Factor
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IEEE Network 06/2003; 17(3):6- 7. · 2.24 Impact Factor
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ABSTRACT: Convergence, interoperability, and mobility are the major advances and factors of differentiation in 3G networks, while the inherent IP support will boost new personalized multimedia services. However, the deployment of a global all-IP wireless/mobile network is not a straightforward decision. A phased approach, focusing on "hot-spot" locations with complementary wireless technologies, seems to be one of the most realistic alternatives. This article discusses a new architecture called unified wireless access that focuses on public "hot-spots." The major algorithms of UniWA are analyzed and evaluated, while the gain is presented and illustrated in selected graphs.
IEEE Communications Letters 07/2002; · 0.98 Impact Factor
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ABSTRACT: Next-generation mobile/wireless networks are already under
preliminary deployment. Mobile/wireless all-IP networks are expected to
provide a substantially wider and enhanced range of services. However,
an evolutionary rather than revolutionary approach to the deployment of
a global all-IP wireless/mobile network is expected. To support global
roaming, next-generation networks will require the integration and
interoperation of mobility management processes under a worldwide
wireless communications infrastructure. In this article global roaming
is addressed as one of the main issues of next-generation mobile
networks. Apart from the physical layer connectivity and radio spectrum
allocation plans, mobility in a hierarchical structured scheme is
discussed. An all-IP wireless/mobile network combined with inherited
mobility schemes of each network layer and Mobile IP extensions is
proposed. In this respect the mobility management mechanisms in WLAN,
cellular, and satellite networks are analyzed, and an all-IP
architecture is described and an enhanced roaming scenario presented
IEEE Communications Magazine 03/2002; · 3.79 Impact Factor
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ABSTRACT: The rapid advancements in optical networking have increased the capacity of physical links. As an alternative to the ASIC or generic microprocessor-based approaches, new semiconductor devices have emerged, called network processors (NP), optimised to provide programmable processing of protocol data units in networks with diverse requirements for current and emerging protocols and services. In this paper we present a NP architecture that targets the tight coupling of software and hardware for the efficient execution of telecommunication protocols. The proposed architecture is based on a high-performance RISC core, which is extended with reconfigurable, pipelined hardware. Additionally, we discuss the application spectrum of the proposed NP and describe a statefull-inspection application for an IP-firewall system. To identify time-critical operations, CPU-consuming functions and the common execution path pertaining to the statefull-inspection application, extensive protocol profiling has been performed resulting in an efficient SW/HW partitioning of the application on the proposed NP platform. The analysis performed concludes that the described protocol processor can sustain demanding protocol processing up to the transport layer for multiple Gbits/sec of incoming network traffic.
Universal Multiservice Networks, 2002. ECUMN 2002. 2nd European Conference on; 02/2002
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ABSTRACT: Multimedia applications introduce new requirements in terms of network resources. Applications need to be capable of specifying and requesting network resources. Many protocols for quality of service (QoS) provision exist. Rendering an application independent from the underlying network reservation protocol constitutes the major motivation for this paper. A QoS middleware is required that will provide a generalised interface for reservations and, at the same time, will take the role of an umbrella, under which a number of different reservation mechanisms can be placed. This paper presents a layered QoS middleware architecture and gives details of the specification and implementation of this architecture in terminals supporting IP and ATM-based applications.
Multimedia Computing and Systems, 1999. IEEE International Conference on; 08/1999
