Transcript Document
WiMAX and its impact on wireless communication Presented by Zhen-Yu Fang What is WiMAX? • WiMAX: Worldwide Interoperability for Microwave Access • It is a telecommunications technology • It is based on IEEE 802.16 standard, which is called Wireless MAN (metropolitan area networks) • The last mile that can be used as alternative of cable and DSL internet access The Architecture of WiMAX The Architecture of WiMAX • WiMAX Mobility Subscriber Station Mobile subscribers (MS) use mobile subscriber stations (MSS)— generalized mobile equipment that provides connectivity between subscriber equipment and base station equipment • WiMAX Access Service Network Access Service Network (ASN) is defined as a complete set of network functions that provide radio access to a WiMAX subscriber, including a proxy AAA server, DHCP addressing function, and other IP-based resources, including network management • WiMAX Connectivity Service Network Connectivity Service Network (CSN) is defined as a set of network functions that provide IP connectivity services to the WiMAX subscribers through the ASN The Architecture of WiMAX • Network Access Provider (NAP) Owns the network and operates • Network Service Provider (NSP) Owns the subscriber and provides service. NSPs shares the NAP or a NSP uses multiple NAPs • Application Service Provider (ASP) provides application services. The Features of WiMAX • Long Rang Connectivity from long range is much highlighted feature of WiMAX. Theoretically, it can provides range up to 30 miles. • Mobility Another significant feature of WiMAX technology is connectivity on move. • Interfacing Since one Base station covers limited range so connecting multiple base stations to each other increase that much range for connectivity. • Accessibility Accessing WiMAX base station is not a difficult task, its long range capability provides connectivity at home from base stations within the range. Compare with WiFi and WiMAX • WiFi: 1. 3. Used for developing wireless LAN to access high speed Internet or access just a network for file sharing and software services. Mostly connected to network in certain area which may not be connect to Internet. Shows that quality of service (QoS) is relative to packet flow. • WiMAX: 1. Refer as Wireless broadband access, which can transfer not only data but also voice data, video data etc and at much higher rates. There are multiple standards of 802.16 a, b etc, so they are used for different types of access from mobile connectivity to fixed location connections. Shows that quality of service (QoS) parameters can be guaranteed for each flow. 2. 2. 3. Security Issues and Risks Conclusion WiMAX is a powerful wireless services access platform that will increasingly support a wide range of revenue-generating voice and data applications for network service provides around the globe. Reference 1. 2. 3. 4. Mustafa Ergen, The Access Service Network in WiMAX: The Role of ASN-GW, WiChorus Inc.. Mahmoud Nasreldin, Heba Aslan, Magdy EL-Hennawy, and Adel El-Hennawy, WiMAX Security, 22nd International Conference on Advanced Information Networking and Applications, pp. 1335-1340, 2008. WiMAX WiFi And Wireless Network, online article on <http://www.wifinotes.com/wimax/index.html> WiMAX Security for Real-World Network Service Provider Deployments, Motorola Inc., 2007