IEEE 802.16 MAC and PHY Specifications for Broadband WMAN 國立中興大學資工系 曾學文 Tel : (04)22840497 ext. 908 E-mail:
[email protected] NCHU CSE WMAN - 1 Resources Part Source : Roger B. Marks, National Institute of Standards and Technology Boulder, Colorado, USA Chair, IEEE 802.16 Working Group http://WirelessMAN.org http://www.intel.com/idf NCHU CSE WMAN - 2 Broadband Access to Buildings • Wireless Metro Ethernet – 802.11 Wireless Ethernet • First/Last mile access – Fast local connection to network » 30%-40% Radio/TV pervasion » 5% internet access – Target Applications (similar as DSL and CableModem) » Data » Voice / Audio » Video distribution » Real-time videoconferencing • High-capacity cable/fiber to every user is expensive – Network operators demand it – Business and residential customers demand it NCHU CSE WMAN - 3 Comparisons of Wireless Standards Bandwidth Assumptions Bandwidth (MHz) 2G/2.5G 1.25 802.20 1xEV-DO, 1xEVDV, 1.25 802.20 Mobile HSDPA 5 (Vehicular) 802.16 <= 20 802.16e Bluetooth 79 x 1 MHz WWAN UWB > 100 2G/2.5G (IMT-2000) Pedestrian ® Cellularcdma2000 1xEV-DO, 802.16a (Nomadic) cdma2000® 1xEV-DV (WiMAX) Mobility WCDMA HSDPA 802.11 (WLAN) Fixed 802.15.1 802.15.3a (Stationary) (Bluetooth) (UWB) 0.1 1.0 3.1 10 100 Peak Data Rate per User (Mbits/second) Commercial Proposed Source: International Telecommunications Union and WiMAX Forum NCHU CSE WMAN - 4 Current Status • More Than 350 Operator Trials and Deployments in 65+ countries! • List of operators – http://en.wikipedia.org/wiki/List_of_Deployed_WiMAX_networks Source: Intel, the WiMAX Forum NCHU CSE WMAN - 5 4G (beyond 3G) / IMT Advanced • 4G, a term used to describe the next complete evolution in wireless communications, – is being developed to accommodate the quality of service (QoS) and rate requirements set by forthcoming applications for "anytime-anywhere".