1 Introduction to Mobile Broadband Wireless Access wireless local area network. There have been continued efforts to deliver ubiquitous broadband wireless access by developing and deploying advanced radio access technologies such as 3GPP UMTS and LTE, as well as mobile WiMAX systems. The broadband wireless access is also an attractive option to network operators in geographically remote areas with no or limited wired network. The advantages in terms of savings in speed of deployment and installation costs are further motivation for broadband wireless access technologies. There are various types of broadband wireless access technologies that are classified based on the coverage area and user mobility as follows: 1. Personal Area Network (PAN) is a wireless data network used for communication among data devices/peripherals around a user. The wireless PAN coverage area is typically limited to a few meters with no mobility. Examples of PAN technologies include Bluetooth or IEEE 802.15.1 [1] and Ultra Wideband (UWB) technology [2]. 2. Local Area Network (LAN) is a wireless or wireline data network used for communication among data/voice devices covering small areas such as home or office environments with no limited mobility. Examples include Ethernet (fixed wired LAN) [3] and Wi-Fi or IEEE 802.11 [4] (wireless LAN for fixed and nomadic users). 3. Metropolitan Area Network (MAN) is a data network that connects a number of LANs or a group of stationary/mobile users distributed in a relatively large geographical area. Wireless infrastructure or optical fiber connections are typically used to link the dispersed LANs. Examples include the IEEE 802.16-2004 (fixed WiMAX) [5] and Ethernet-based MAN [3]. 4. Wide Area Network (WAN) is a data network that connects geographically dispersed users via a set of inter-connected switching nodes, hosts, LANs, etc., and covers a wide geographical area. Examples of WAN include the Internet [3] and cellular networks such as 3GPP UMTS [6], 3GPP LTE [7], and mobile WiMAX or IEEE 802.16-200