wireless body area network ppt

Ngày tải lên: 19/06/2014, 08:20

Ngày tải lên: 19/06/2014, 10:20

Ngày tải lên: 01/09/2013, 10:30

Ngày tải lên: 20/06/2014, 22:20

Ngày tải lên: 21/06/2014, 01:20

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 21/06/2014, 23:20

Ngày tải lên: 01/08/2014, 07:21

... faceplate 6644 1 152-XX 2 outlet labeling areas and 2 individual port ID areas 4-port faceplate 6644 1 154-XX 2 outlet labeling areas and 4 individual port ID areas CopperTen ™ 4-port staggered ... TNSCSFPSO4-YY 2 Includes: 2 outlet labeling areas and 4 individual port ID areas. 6-port faceplate 6644 1 156-XX 2 outlet labeling areas and 6 individual port ID areas Dual-gang flush mount faceplates ... w . a d c . c o m • + 1 - 9 5 2 - 9 3 8 - 8 0 8 0 • 1 - 8 0 0 - 3 6 6 - 3 8 9 1 Work Area Solutions Work Area Solutions Category 6A Modular Jacks *Replace XX with: 01 = White 06 = Blue 02...

Ngày tải lên: 24/01/2014, 15:20

Ngày tải lên: 18/02/2014, 04:20

... can be implemented to increase network security. There are two primary types of IDS: network based and host-based. The network based system acts similarly to a network level firewall. It cannot ... information about the network con- figuration. Authentication, especially of exter- nal BACnet users. Network Layer Attacks I-Am-Router- To -Network The I-Am-Router-To -Network message can ... traffic across the untrusted network (LAN/Internet). • As a router, separates the trusted network from the untrusted and thus can act as a BACnet firewall, performing network layer or application...

Ngày tải lên: 14/03/2014, 22:20

Ngày tải lên: 21/06/2014, 17:20

Ngày tải lên: 21/06/2014, 23:20

... 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 WPAN ... 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 ... devices • Include – Bluetooth – 802.15.4 (ZigBee) 12 Bluetooth Protocol Stack (continued) 14 Bluetooth Protocol Stack (continued) • Network topologies (continued) – Scatternet • Group of piconets in which connections exist between...

Ngày tải lên: 13/09/2012, 10:52

... corrected – Also called error correction (FEC) Wireless# Guide to Wireless Communications 26 Mesh Networking (802.15.5) (continued) Wireless# Guide to Wireless Communications 28 How UWB Works • UWB ... are present in the same order in every frame Wireless# Guide to Wireless Communications 15 802.15.3 Network Topology (continued) Wireless# Guide to Wireless Communications 27 Ultra Wide Band (UWB) • Allows ... 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...

Ngày tải lên: 13/09/2012, 10:52

... wired network interface port • AP functions – Wireless communications base station – Bridge between the wireless and wired networks 6 Wireless Network Interface Card (continued) 5 Wireless Network ... 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 ... 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...

Ngày tải lên: 13/09/2012, 10:52

... WMAN? • Wireless metropolitan area networks (WMANs) – Provide wireless connectivity across a substantial geographical area such as a large city • WMANs primary goals – Extend wired networks ... Wireless Communications Wireless Metropolitan Area Networks 14 Multichannel Multipoint Distribution Service (MMDS) • Multichannel multipoint distribution service (MMDS) – Fixed broadband wireless ... same network • WiMAX MAC layer makes it easy for carriers to deploy the network • Range of a WiMAX network is measured in miles • Cellular phone operators can easily incorporate WiMAX networks 3 What...

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 ... technologies 16 2.5 Generation Cellular Telephony (continued) • 2.5G network technologies – General Packet Radio Service (GPRS) • For TDMA or GSM 2G networks • Uses eight time slots in a 200 KHz spectrum and...

Ngày tải lên: 13/09/2012, 10:52