This memo describes a framework for supporting IETF Integrated Services on shared and switched LAN infrastructure. It includes background material on the capabilities of IEEE 802 like networks with regard to parameters that affect Integrated Services such as access latency, delay variation and queueing support in LAN switches. It discusses aspects of IETF’s Integrated Services model that cannot...

The aim of this paper is to identify the functions of social co`nition in a communication context[ It is ar`ued that social co`nition is for the re`ulation of adaptive action and makes use of external devices "e[`[ lan`ua`e# to implement action[ First\ the complexity of communication as a social achievement is discussed to prepare the `round for examinin` the link between lan`ua`e\ co`nition an...

To allow a seamless integration between wireless LANs and Wireless WANs, we developed a full stack adaptation model and a simple subnet architecture that superimposes Mobile-IP on cellular-type wireless LANs. The idea is to use Mobile IP as an integrative layer atop different LAN/WAN networks. While Mobile-IP is widely used in wireless WANs, it is not known how well it performs under a wireless...

This thesis is devoted to improve the service performance for the multimedia traffics in wireless LAN networks. Review of TCP/IP model and Wireless LAN are conducted. An abstract model of network mobility framework is achieved based on investigating the state of art of mobility support. By the analysis of this model, we propose a new Xcast based scheme (X&M) to improve the deficiencies of Mobil...

Voice over Internet Protocol (VoIP) is a form of voice communication that uses audio data to transmit voice signals to the end user. VoIP is one of the most important technologies in the World of communication. Around, 20 years of research on VoIP, some problems of VoIP are still remaining. During the past decade and with growing of wireless technologies, we have seen that many papers turn thei...

In this paper an overview of the wireless local area network (LAN) area is provided. The two types of wireless LAN topologies used today, infrastructure and ad hoc, are presented. The requirements that a wireless LAN is expected to meet are discussed. These requirements impact on the implementation of both the Physical and MAC layer of a wireless LAN. The unique characteristics of wireless phys...

To overcome the partial visibility problem that Mobile Ad-Hoc Networks (MANET) exhibit [1] data link-level (level 2 OSI) routing protocols must be considered. Examples of protocols in use are the Ad Hoc On-Demand Distance Vector (AODV) [2] routing protocol -reactiveand the Destination-Sequenced Distance Vector (DSDV) [3] routing protocol -proactive-, and reviews of other routing protocols are a...

PURPOSE The purpose of this study is to link both numeric and structural chromosomal aberrations to the effectiveness of radiotherapy in chemotherapy refractory tumor cells. MATERIALS AND METHODS Neuroblastoma (LAN-1) and 79HF6 glioblastoma cells derived from patients and their chemoresistant sublines were artificially cultured as neurospheres and irradiated by X-rays and heavy ions sources. ...

mobility and portability with high-bandwidth data, voice, and video access. This has led to the introduction of wireless LAN technologies, which attempt to provide exactly that. In the 2.4 GHz frequency band, IEEE 802.11b is “the” wireless LAN solution in the market. However the 5 GHz frequency has two possible contending technologies — IEEE 802.11a and HiperLAN2. This white paper explains the ...

In recent years, position estimation systems using wireless LAN have been actively studied, along with the publication of many contributions. However, most of these location estimation methods require prior knowledge of wireless LAN access point locations. To deploy a location estimation system widely in the real world, it is crucial to develop an efficient pre-acquisition method of wireless LA...