Mobile Computing - Wireless Networking, Study notes of Mobile Computing

Download Mobile Computing - Wireless Networking and more Study notes Mobile Computing in PDF only on Docsity! 1 MOBILE COMPUTING 2 Wireless Networking  While the term wireless network may technically be used to refer to any type of network that is wireless, the term is most commonly used to refer to a telecommunications network whose interconnections between nodes is implemented without the use of wires, such as a computer network (which is a type of communications network).  Wireless telecommunications networks are generally implemented with some type of remote information transmission system that uses electromagnetic waves, such as radio waves, for the carrier and this implementation usually takes place at the physical level or "layer" of the network.  Types of Wireless Networking  Wireless LAN : Similar to other wireless devices, it uses radio instead of wires to transmit data back and forth between computers on the same network. .  Wi-Fi: Wi-Fi is a commonly used wireless network in computer systems which enable connection to the internet or other machines that have Wi-Fi functionalities. Wi-Fi networks broadcast radio waves that can be picked up by Wi-Fi receivers that are attached to different computers or mobile phones.  Fixed Wireless Data: Fixed wireless data is a type of wireless data network that can be used to connect two or more buildings together in order to extend or share the network bandwidth without physically wiring the buildings together. 5 IEEE 802 Standards  IEEE 802.1 Bridging (networking) and Network Management  IEEE 802.2 Logical link control (inactive)  IEEE 802.3 Ethernet  IEEE 802.4 Token bus (disbanded)  IEEE 802.5 Defines the MAC layer for a Token Ring (inactive)  IEEE 802.6 Metropolitan Area Networks (disbanded)  IEEE 802.7 Broadband LAN using Coaxial Cable (disbanded)  IEEE 802.8 Fiber Optic TAG (disbanded)  IEEE 802.9 Integrated Services LAN (disbanded)  IEEE 802.10 Interoperable LAN Security (disbanded)  IEEE 802.11 Wireless LAN & Mesh (Wi-Fi certification)  IEEE 802.12 demand priority (disbanded)  IEEE 802.13 Not used (officially)  IEEE 802.13ah:-Defines "Copper for the first mile" for Metro Area Networks (proposed)  IEEE 802.14 Cable modems (disbanded)  IEEE 802.15 Wireless PAN  IEEE 802.15.1 (Bluetooth certification)  IEEE 802.15.4 (ZigBee certification)  IEEE 802.16 Broadband Wireless Access (WiMAX certification)  IEEE 802.16e (Mobile) Broadband Wireless Access  IEEE 802.16.1 Local Multipoint Distribution Service  IEEE 802.17 Resilient packet ring  IEEE 802.18 Radio Regulatory TAG  IEEE 802.19 Coexistence TAG  IEEE 802.20 Mobile Broadband Wireless Access  IEEE 802.21 Media Independent Handoff  IEEE 802.22 Wireless Regional Area Network 6 Design Goals for Wireless LANs Global, seamless operation  Low power for battery use  No special permissions or licenses needed to use the LAN  Robust transmission technology  Simplified spontaneous cooperation at meetings  Easy to use for everyone, simple management  Protection of investment in wired networks  Security (no one should be able to read my data)  Privacy (no one should be able to collect user profiles)  Safety (low radiation)  Transparency concerning applications and higher layer protocols,  Location awareness if necessary