WiMAX and Wi-Fi Services through Mobile Networks

Abstract

WIFI and WiMAX became popular worldwide due to simplicity of installation and cost reduction compared with traditional DSL cable. The key challenge of WiFi is the restricted mobility of the user whereas mobile WiMAX (IEEE 802.16m) provides ubiquitous environment to the user. The recent challenges of WiMAX is managing radio resources (both licensed and unlicensed) efficiently through different QoS service classes, implementing proper modulation and coding schemes at PHY, proper antenna selection in MIMO to achieve better QOS. User can avail the benefits of speed and mobility through an integrated architecture comprising WiFi and WiMAX. This chapter provides an in depth performance evaluation of Mobile WiMAX and WiFi under various Modulation and Coding Schemes (MCS), cyclic prefixes and different path-loss models under integrated environment. Moreover, we present an optimized adaptive modulation scheme that senses the SNR and adaptively switches to required MCS to achieve desired level of QoS and link stability.

An Efficient and Secure Initial Network Entry Protocol (ESINEP) for IEEE 802.16

“…This standard operates in 2-11 GHz frequency band [4]. Mobile WiMAX (IEEE 802.16 e) was available in 2005, it is a broadband wireless access that supports the connectivity of mobile station (MS) under the coverage of base station BS [5]. IEEE 802.16e operates in 2-11 GHz band under non line of sight conditions [6].…”

“…Recently, IEEE 802.16j, has also been approved as the official standard for Mesh WiMAX. In this system, the BS is connected within its coverage area with additional BS's with smaller coverage area to relay the connectivity signals between BS and a (MS) to augment the quality of the link to the end user [5].…”