range of 802 11g wireless networks

Ngày tải lên: 18/10/2013, 12:15

... A-1 GUIDE TO SECURING LEGACY IEEE 802. 11 WIRELESS NETWORKS 2. Overview of IEEE 802. 11 Wireless Local Area Networks Wireless local area networks (WLAN) are groups of wireless networking nodes within ... commonly used forms of WLAN technologies: IEEE 802. 11a, 802. 11b, 802. 11g, and 802. 11n. In addition, a brief overview of the updated security standard for IEEE 802. 11 networks, IEEE 802. 11i, is provided. ... http://standards.ieee.org/getieee802/download /802. 11-2007.pdf D-1 GUIDE TO SECURING LEGACY IEEE 802. 11 WIRELESS NETWORKS Appendix A—Summary of IEEE 802. 11 Standards Table A-1 summarizes the various IEEE 802. 11 standards....

Ngày tải lên: 14/02/2014, 08:20

... Performance analysis of wireless networks with directional antennas. IEEE Transactions on Vehicular Technology 57, 5 (2008), 3187–3199. 16 Eavesdropping range Indoor noise floor Outdoor noise floor Boosted range Amplified noise ... speeds of automobiles raise questions about the feasibility of eavesdropping. In this section, we experimentally evaluate the range of TPMS communications and further evaluate the feasi- bility of ... we studied the reception range of stand-alone sensors in a hallway. In the outdoor environment, we drove one of the authors’ cars around to measure the reception range of the sensors mounted in...

Ngày tải lên: 23/03/2014, 10:20

... Chapter 13. 802. 11a and 802. 11j: 5-GHz OFDM PHY Orthogonal Frequency Division Multiplexing (OFDM) OFDM as Applied by 802. 11a OFDM PLCP OFDM PMD Characteristics of the OFDM PHY ... 2, Overview of 802. 11 Networks, describes the overall architecture of 802. 11 wireless LANs. 802. 11 is somewhat like Ethernet but with a number of new network components and a lot of new acronyms. ... working group, 802. 3. Wireless LANs were the eleventh working group formed, hence the name 802. 11. Chapter 2. Overview of 802. 11 Networks Before studying the details of anything, it often helps...

Ngày tải lên: 05/05/2014, 12:46

... hoc wireless networks. The first part of this chapter presents the taxonomy of single-hop wireless technologies. Specifically, we introduce the concept of Body, Personal, and Local wireless networks, ... of the backoff mechanism in IEEE 802. 11 networks, Computer Networks, 37, 33–44, [8] R. Bruno, M. Conti, and E. Gregori, Wireless Access to Internet via Bluetooth: Performance Evaluation of ... Hoc Wireless Networks Y u-Chee Tseng and Ting-Yu Lin 5 P erformance Analysis of Wireless Ad Hoc Networks A nurag Kumar and Aditya Karnik 6 C oding for the Wireless...

Ngày tải lên: 03/06/2014, 01:08

... for 802. 16 infrastructure is Table 1-1. Standards: 802. 11 vs. 802. 16 Feature 802. 11 802. 11b 802. 11a 802. 11g 802. 16 802. 16a Assigned spectrum 2.46GHz 2.4GHz 5.8GHz 2.4GHz 10GHz– 66GHz 2GHz– 11GHz Maximum ... versatile. Unlike the standards governing WLANs (namely, 802. 11 and its derivatives 802. 11b, 802. 11a, 802. 11g, 802. 11e, 802. 11n, 802. 11p, and 802. 11s), the 802. 16 standards do not state fixed throughput ... constructed of 802. 11 network elements will cost a fraction of the amount of money required to purchase 802. 16 equipment. If the network consists of nothing but short cell radius hotspots, 802. 11...

Ngày tải lên: 03/06/2014, 01:46

Ngày tải lên: 21/06/2014, 01:20

... of packets to various applica- tions. In wireless networks, packets are transmitting with the presence of wireless links. When TCP operates in wireless networks, t he end-to-end performance of TCP ... thereby increase the perfor- mance of TCP over wireless networks. List of Abbreviations ACL: accuracy of congestion loss; ARL: accuracy of random loss; APR: accuracy of packet reordering; BS: buffer ... number of contention of nodes. Moreover, in wireless networks, the interferences between neighboring nodes are much higher compared to local area networks. As a result, the bit error rates of wireless...

Ngày tải lên: 21/06/2014, 02:20

Ngày tải lên: 21/06/2014, 02:20

Ngày tải lên: 04/07/2014, 08:47

Ngày tải lên: 08/08/2014, 09:22

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

Ngày tải lên: 14/08/2014, 13:20

... Introduction 1.1 The Need for Third-Generation Wireless Technologies The first generation of wireless networks was primarily concerned with the provision of voice services, allowing users to transition ... One source of co- channel interference, de-correlated in time with 0 frequency offset. One source of adjacent channel interference, de-correlated in time with 200 kHz of frequency offset. One ... One source of co-channel interference, de-correlated in time with 0 frequency offset. One source of adjacent channel interference, de-correlated in time with 200 kHz of frequency offset. One...

Ngày tải lên: 26/04/2013, 11:15

... 269 IEEE 802. 11f, 269 IEEE 802. 11g, 268 IEEE 802. 11g, 269 IEEE 802. 11h, 269 IEEE 802. 11i, 269 IEEE 802. 15, 10 Working Group, 301 IEEE 802. 16, 235 IEEE 802. 3, 61 IEEE 802. 4 Working Group, 239 I-interface, ... 213 Index404 14 Economics of Wireless Networks 14.1 Introduction The field of mobile wireless communications is currently one of the fastest growing segments of the telecommunications industry. Wireless devices ... for wireless telecommunication companies. This chapter overviews several economic aspects of wireless networks, including economic benefits of wireless networks, facts that affect the economics of...

Ngày tải lên: 29/09/2013, 21:20

... of these measures actually thwarts the overall goals of the wireless provider – to deliver cost- effective, always available, high quality services. Operations: The Custodians of Evolving Networks Wireless ... meeting the needs of Operations by designing and implementing the physical layer with a foundation of connectivity. Designing for Profitability in the Physical Layer of Wireless Networks Introduction Growth ... maintenance and troubleshooting of a steadily growing network infrastructure. Clearly, the physical layer of the wireless network is getting larger and more complex. With more wireless data services...

Ngày tải lên: 21/12/2013, 08:17