wireless personal area networks powerpoint

... using SIR • Then they shift to FIR speed Wireless Communications Low Rate Wireless Personal Area Networks 2 Objectives • Describe a wireless personal area network (WPAN) • List the different ... work • Describe the security features of low-rate WPAN technology 3 What is a WPAN? • Wireless personal area network (WPAN) – Group of technologies that are designed for short- range communications – Eliminates ... standard – IrDA devices cannot send and receive at the same time – IrDA is easy to use • Bluetooth is a wireless technology that uses short- range radio frequency (RF) transmissions – Supported by over...

Ngày tải lên: 13/09/2012, 10:52

... Functionality (continued) Wireless Communications Chapter 6 High Rate Wireless Personal Area Networks Wireless# Guide to Wireless Communications 36 Competition Among WPAN Standards • IEEE 802.15.3 ... and storage Wireless# Guide to Wireless Communications 32 How UWB Works (continued) Wireless# Guide to Wireless Communications 18 Additional MAC Layer Functionality (continued) Wireless Communications Chapter ... superframes Wireless# Guide to Wireless Communications 22 Additional MAC Layer Functionality (continued) Wireless# Guide to Wireless Communications 24 Additional MAC Layer Functionality (continued) Wireless# ...

Ngày tải lên: 13/09/2012, 10:52

... WIRELESS PERSONAL AREA NETWORKS 1.4.2 IEEE 802.11 MAC The IEEE 802.11 protocol (O’Hara and Petrick 1999) is, strictly speaking, intended for wireless local area networks (LANs), rather than wireless ... θ 0 = ( γδ/P a ) π 0 , where we make use of the probability Part I WPANS and 802.15.4 Wireless Personal Area Networks: Performance, Interconnections and Security with IEEE 802.15.4 J. Mi ˇ si ... 6 PROLOGUE: WIRELESS PERSONAL AREA NETWORKS of periodic beacon transmissions facilitates the process of placing the reservation...

Ngày tải lên: 25/03/2014, 12:14

... of wireless clients and an AP • Extended Service Set (ESS) – Two or more BSS wireless networks installed in same area – Provides users with uninterrupted mobile access to the network • All wireless ... only communicate among themselves Wireless Communications Wireless Local Area Networks 4 WLAN Components • Minimal hardware needed for a WLAN – Computer – ISP – Wireless network interface card – Access ... a wireless NIC – Mounted directly on the motherboard 3 WLAN Applications • Wireless networks are increasing in popularity • Installing cabling is inconvenient and very expensive – Wireless networks...

Ngày tải lên: 13/09/2012, 10:52

... easily incorporate WiMAX networks 3 What is a WMAN? • Wireless metropolitan area networks (WMANs) – Provide wireless connectivity across a substantial geographical area such as a large city • WMANs ... Wireless Communications Wireless Metropolitan Area Networks 14 Multichannel Multipoint Distribution Service (MMDS) • Multichannel multipoint distribution service (MMDS) – Fixed broadband wireless ... to an entire area with only a few radio transmitters – MMDS cell size can have a radius of up to 35 miles (56 kilometers) 2 Objectives • Explain why wireless metropolitan area networks (WMANs)...

Ngày tải lên: 13/09/2012, 10:52

... 1xEVDO • For 2.5G CDMA2000 1xRTT networks 25 Binary Runtime Environment for Wireless (BREW) • BREW is a thin software environment – Very small program that resides on a wireless device • Capable ... frequency channels • Supports 144 Kbps packet data transmission 2 Objectives • Describe wireless wide area networks (WWANs) and how they are used • Describe the applications that can be used on ... 24-hour period 30 Satellite Transmissions (continued) 26 Satellite Broadband Wireless • Use of satellites for personal wireless communication is fairly recent • Satellite use falls into three broad...

Ngày tải lên: 13/09/2012, 10:52

... and Heile R. F. Paving the Way for Personal Area Network Standards: an Overview of the IEEE P802.15 Working Group for Wireless Personal Area Networks, IEEE Personal Commu- nications, February, ... A-nodes are mobile personal computers and Personal Digital Assistants (PDAs). Wireless Networks3 16 Figure 11.14 Main differences between HomeRF versions 1.2 and 2.0 11 Personal Area Networks (PANs) 11.1 ... B., Gifford I. and Siep T. IEEE 802 Perspectives, The IEEE P802.15 Working Group for Wireless Personal Area Networks, IEEE Network, July, 1999. [6] AU-system, Bluetooth Whitepaper 1.1, January,...

Ngày tải lên: 29/09/2013, 21:20

... improve- ments. 9.7 Summary In this chapter we cover the area of Wireless Local Area Networks by focusing on a number of issues: † WLAN topologies. The two types of wireless LAN topologies used today are the ... Control Protocol for Wireless Data Networks, in Proceedings of IEEE GLOBECOM, 1993, pp. 1713–1717. [9] Chen K C. and Lee C H. Group Randomly Access Polling for Wireless Data Networks, in Proceedings ... Stallings W. Local and Metropolitan Area Networks, Fifth Edition, Upper Saddle River, NJ. [13] Obaidat M. S. and Ahmed C. B. Schemes for Mobility Management of Wireless ATM Networks, International Journal...

Ngày tải lên: 29/09/2013, 21:20

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... /?Issue=34&IssueDate=04-01-2001&CP= 11/06/01 Date of Issue: 04-01-2001 CCNA Layer 2 Switching - Virtual Local Area Networks Lab Scenario by Leigh Anne Chisholm Introduction Preparing Your Switches Section 1...

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