• Delay sensitive multimedia applications are booming over a variety of time-varying networks (e.g. sensor networks, WiMax, Wireless LAN, etc.) • Existing dynamic distributed network environments cannot provide adequate support for delay-sensitive multimedia applications • This problem has been investigated for a decade, but we still do not have efficient solutions for it.

We propose a new optical Local Area Network (LAN) that exhibits high total capacity and enables the connection of a great number of nodes. It is based on the combined advantages of coherent techniques and Frequency Division Multiplexing (FDM). The network topology is a passive star with a shared local oscillator that allows simple emission and detection schemes.

Wireless local area network (WLAN) technology is one of the fastest growing areas in the information technology sphere, and with good reason. The benefits of using wireless include reduced move/add/change costs, the elimination of wire plant requirements in new workspace or older structures that pose challenges for traditional wiring, mobility of workers and data, and many others. While this gr...

This paper looks at infrastructure security for future mobile communications. The technology considered is Third Generation Partnership Project (3GPP) based mobile network with Internet Protocol (IP) stack and its interworking with Wireless Local Area Network (WLAN). Infrastructure security definition and requirements for a Mobile Network Operator (MNO) are presented in the paper and extent of ...

This paper analyzes the transmission of voice and data over an 802.11 Wireless Local Area Network (WLAN). The data is transmitted in a contention based access period, while the voice samples are transmitted during a contention free period, based on a polling scheme. Because statistical multiplexing can be utilized, speech may be outdated when a poll arrives. The portion of outdated speech is th...

The Control System for Linear IFMIF Prototype Accelerator (LIPAc) consists of six subsystems; Central Control System (CCS), Local Area Network (LAN), Personnel Protection System (PPS), Machine Protection System (MPS), Timing System (TS) and Local Control Systems (LCS). The LIPAc provides deuteron beam with beam power more than 1 MW, and this control system is required the high reliability and u...

Wireless local area network (WLAN) has been widely used in many sectors. The popularity gained is due to many reasons, such as ease of installation, installation flexibility, mobility, reduced cost-of-ownership, and scalability. However, regardless of the benefits, WLAN have some security threats. This paper begins by introducing the concept of WLAN. The introductory section gives brief informa...

This paper presents a new medium access method for a wireless inhouse local area network (LAN). Several existing (draft) standards for wireless communication (e.g. IEEE 802.11, HIPERLAN or Magic WAND) cannot full ll quality of service demands for typical inhouse applications (e.g. video, audio, phone and computer) or they set up the need for a central hub. We show that quality of service demand...