This paper examines the phenomenon of congestion in order to better understand the congestion management techniques that will be needed in high-speed, cell-based networks. The first step of this study is to use high time-resolution local area network (LAN) traffic data to explore the nature of LAN traffic variability. Then, we use the data for a trace-driven simulation of a connectionless servi...

This paper presents a process model of plan inference for use in natural language consultation systems. It includes a strategy that can both defer unwarranted decisions about the relationship of a new action to the user’s overall plan and sanction rational default inferences. The paper describes an implementation of this strategy using the Dempster-Shafer theory of evidential reasoning. Our pro...

In this case study we consider model-checking of some properties for IEEE 802.11 Wireless LAN [1]. Since stations in wireless LANs are not able to listen to their own transmission they cannot employ Carrier Sense Multiple Access with Collision Detection (CSMA/CD) as already investigated in one of our other case studies. Hence, other techniques need to be used to handle collisions. The IEEE 802....

The MAC (Medium Access Control) protocols can be roughly categorized into three broad classes [16]. The fixed assignment set will have schemes like TDMA, CDMA and FDMA. These protocols lack the flexibility in allocating resources and thus have problems with configuration changes. This makes them unsuitable for dynamic and bursty wireless packet data networks. The random assignment class consist...

Wireless LANs provide mobility. Who does not want to be able to carry their laptop to the conference room down the hall and still have complete network access without worrying about network cables? Manufacturing companies are even using wireless LANs (WLANs) to monitor shop-floor machinery that is not traditionally accessible by network cabling. Increased mobility and accessibility improves com...

Current evidence indicates that the abnormal expression of chemokines or their receptors, such as CXC chemokine receptor-4 (CXCR4), is positively correlated with the development, progression and metastasis of tumor cells. However, the role of CXCR4 in neuroblastoma and its response to chemotherapy remain largely unclear. In addition, forkhead box 3 (Foxp3), a transcription factor associated wit...

Q: What is a Wireless LAN (WLAN)? Q: What are the benefits of using a WLAN instead of a wired network connection? Q: Are Intel WLAN products interoperable with other product brands? Q: What is Wi-Fi*? Q: What is IEEE 802.11b, 802.11g, and 802.11a? Q: What is the transmission range of WLAN products? Q: What data rates are available with a WLAN network connection? Q: What is an Access Point? Q: W...

The sometimes-held position that the DoD Standard Transmission Control Protocol (TCP) and Internet Protocol (IP) are inappropriate for use "on" a Local Area Network (LAN) is shown to be fallacious. The paper is a companion piece to M82-47, M82-49, M82-50, and M82-51.

This paper describes air interface standards for wireless local area network (LAN), wireless metropolitan area network (MAN), and wireless personal area network (PAN) technology being developed within the IEEE 802 LAN MAN Standards Committee of the Institute of Electrical and Electronics Engineers, Inc. (IEEE). 1 U.S. Government work, not subject to U.S. Copyright. IEEE C802.16-03/03

Department of Computer Science, Ryerson University, Toronto, ON, Canada Department of Computing and Information Science, University of Guelph, Guelph, ON, Canada c School of Information Technology, Indian Institute of Technology, Kharagpur, West Bengal, India College of Electrical Engineering and Computer Science, National I-Lan University, I-Lan, Taiwan, ROC Department of Computer Science, Mon...