802 11 wireless networks

... the IEEE 802. 11 radio transmission standards and modulation techniques, such as IEEE 802. 11a, 802. 11b, and 802. 11g; any future IEEE 802. 11 standard will also be compatible with IEEE 802. 11i. 4 Table ... 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. ... 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...

Ngày tải lên: 14/02/2014, 08:20

... and cannot touch an 802. 11 hot spot. This is a book about 802. 11 networks. 802. 11 goes by a variety of names, depending on who is talking about it. Some people call 802. 11 wireless Ethernet, to ... incorporate changes made by 802. 11a, 802. 11b, and 802. 11d, as well as changes made by TGc into the main 802. 11 specification. (Think "m" for maintenance.) TGn (future 802. 11n) Task group founded ... "faster, better, and cheaper," the data rate of most 802. 11 interfaces has shot from 2 or 11 Mbps with 802. 11b to 54 Mbps with 802. 11a and 802. 11g. Increased speed with backwards compatibility has...

Ngày tải lên: 05/05/2014, 12:46

Ngày tải lên: 21/06/2014, 01:20

... [http://www.wifly.com.tw/]. doi:10 .118 6/1687-1499-2 011- 30 Cite this article as: Hsieh and Kao: Handoff optimization in 802. 11 wireless networks. EURASIP Journal on Wireless Communications and Networking 2 011 2 011: 30. Submit ... RESEARCH Open Access Handoff optimization in 802. 11 wireless networks IP Hsieh and Shang-Juh Kao * Abstract In 802. 11 wireless networks, a complete handoff procedure for a mobile node ... metropolitan area networks specific requirements–Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE Std 802. 11- 2007 (Revision of IEEE Std 802. 11- 1999), June...

Ngày tải lên: 21/06/2014, 02:20

... CF-Ack (no data transmitted) 0110 CF-Poll (no data transmitted) 0111 Data+CF-Ack+CF-Poll (Frame type 11 is reserved) [a] Management subtypes 0110 - 0111 and 110 1 -111 1 are reserved and not currently ... and 802. 11 Chapter 10. The ISM PHYs: FH, DS, and HR/DS Section 10.1. 802. 11 FH PHY Section 10.2. 802. 11 DS PHY Section 10.3. 802. 11b: HR/DSSS PHY Chapter 11. 802. 11a: ... contemplating rolling out 802. 11 equipment onto networks or building networks based on 802. 11 ã Network administrators responsible for building and maintaining 802. 11 networks ã Security professionals...

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

... 10.1.2.1 s5 10.1.1.5 10.1.1.1 s1 10.1.1.2 s2 s4 10.1.1.4 s3 10.1.1.3 nAP 10.1.1.100 Windows PCs (XP) Gigabit Ethernet AP 802. 11b channel #1 Windows laptop (Vista) 802. 11b NIC Windows laptops (XP) 802. 11b NIC AP 802. 11b channel #11 Wireless network monitor (NetMon) 10.1.1.10 n1 10.1.2.10 n0 10.1.1.20 n2 10.1.1.30 n3 10.1.1.40 n4 10.1.1.50 n5 Figure ... denotes that 802. 11b APs are saturated, STAs in LLF mechanism are likely to select 802. 11b APs since the loaded traffic on the 802. 11b APs ( 11 Mbps) is less than that on the 802. 11a APs ( ≤54 ... equipping Netgear JWAG 511 WLAN NIC and is associated with an 802. 11b AP (cAP) on channel number 1. On the other hand, there exists a neighbor 802. 11b AP (nAP) on channel number 11 which is orthogonal...

Ngày tải lên: 21/06/2014, 23:20

... comfortable with 802. 11. The shared heritage is deep enough that 802. 11 is sometimes referred to as " ;wireless Ethernet." The core elements present in Ethernet are present in 802. 11. Stations ... the same wireless medium. Stations may obtain access to the medium only by using the rules specified in the 802. 11 MAC; these rules were carefully designed to enable multiple 802. 11 networks ... grassroots community networks. With the rapid price erosion of 802. 11 equipment, bands of volunteers are setting up shared wireless networks open to visitors. Community networks are also extending...

Ngày tải lên: 25/03/2014, 10:39

... Devices 802. 11 MAC Layer Operations Summary Chapter 3. 802. 11 Physical Layer Technologies Wireless Physical Layer Concepts 802. 11 Wireless LANs 802. 11b WLANs 802. 11a WLANs ... 2. 802. 11 Wireless LANs This chapter covers the following topics: Overview of wireless LAN (WLAN) topologies 802. 11 medium access mechanisms 802. 11 MAC layer operations 802. 11 frame formats 802. 11 ... 802. 11a WLANs 802. 11g WLANs CCA Summary Chapter 4. 802. 11 Wireless LAN Security Wireless Security Overview of Encryption Encryption in the 802. 11 Standard Authentication...

Ngày tải lên: 18/04/2014, 12:28

... 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 ... 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 ... 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 will...

Ngày tải lên: 03/06/2014, 01:46

... of the IEEE 802. 11 wireless networks. Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2 011, Article ID 105675, 16 pages doi:10 .115 5/2 011/ 105675 Research ... time synchronization in the access point and wireless stations is included in the 8021 1MgmtAP-STSF and 8021 1MgmtSTA- STSF sublayers, respectively. The structure of the 8021 1-ACFNC-NIC for the access point ... Therefore, we created a new wireless host which is named 8021 1DoS-Host with the 8021 1DoS-NIC. This new node is considered as the attacker and includes a new MAC layer to conduct the wireless DoS attacks....

Ngày tải lên: 21/06/2014, 05:20

... with the peak rate 54 Mbps of IEEE 802. 11a wireless LANs. When the multicast and uplink user payloads of 88 bits or 1000 bits are transmitted in IEEE 802. 11a wireless LANs, we present the results ... IEEE 802. 11 wireless LANs,” EURASIP Journal on Wireless Communications and Networking, vol. 2008, Article ID 598038, 10 pages, 2008. [11] K. Xu, M. Gerla, and S. Bae, “How effective is the IEEE 802. 11 RTS/CTS ... L. Huang, S. Wang, A. Arora, and T H. Lai, “Reli- able MAC layer multicast in IEEE 802. 11 wireless networks, ” Wireless Communications and Mobile Computing, vol. 3, no. 4, pp. 439–453, 2003. [4]...

Ngày tải lên: 21/06/2014, 23:20

... IEEE 802. 11a, IEEE 802. 11b, and IEEE 802. 11g technologies support the max- imum PHY data rates of 54 Mbps, 11 Mbps, and 54 Mbps, respectively [2–4]. All these PHY variants of IEEE 802. 11 wireless ... 9 microseconds in IEEE 802. 11a wireless LANs. In Figures 4, 5, 6, 7, 8, 9, 10, 11, and12, we present the simulation results of the maximum delay bounds of IEEE 802. 11a wireless LAN with the conventional PCF ... on IEEE 802. 11a wireless LAN with 20 STAs. 200 220 240 260 280 300 320 340 Mean delay bound (ms) r 1.3r 1.5r 1.8r Infinity R PCF (B = 11) Simultaneous polling (B = 11) Hybrid polling (B = 11) Figure...

Ngày tải lên: 21/06/2014, 23:20

... quality of service in IEEE 802. 11 networks, ” IEEE Wireless Communications, vol. 11, no. 4, pp. 6–14, 2004. [13] J. Deng and R S. Chang, “A priority scheme for IEEE 802. 11 DCF access method,” IEICE ... EEE 802. 11e for QoS support in wireless LANs,” IEEE Wireless Communications, vol. 10, no. 6, pp. 40–50, 2003. [3] J. W. Robinson and T. S. Randhawa, “Saturation throughput analysis of IEEE 802. 11e ... EEE Std. 802. 11, 1999. [6] Medium Access Control (MAC) Enhancements for Quality of Service (QoS), D4.4, IEEE Draft Std 802. 11e, 2003. [7] F. Cali, M. Conti, and E. Gregori, “IEEE 802. 11 protocol:...

Ngày tải lên: 22/06/2014, 22:20