Wireless Network (EC-803 (A)) - Important Questions

Explain the advancement and migration from GSM to UMTS in terms of data rates, coverage and services.

Explain the protocol architecture of IEEE 802.11 WLAN, including the Physical (PHY) layer and MAC layer / MAC management.

Describe the E-UTRAN architecture and its components, roles in wireless communication, mobility management and resource allocation in LTE.

Differentiate between SISO and MIMO systems and discuss advantages of MIMO over SISO in terms of reliability, coverage and data rate.

Discuss security issues and challenges in Wireless Sensor Networks (WSN) and techniques for data confidentiality, integrity and authenticity.

Draw and explain the architecture of a Wireless Sensor Network with suitable diagram, including coverage and placement needs.

Explain the medium access problems in wireless networks and their impact on communication performance.

Compare IPv4 versus IPv6 protocols addressing and architecture. A wireless router forwards 12000 packets/hour where 8% packets are lost during transmission, calculate successfully delivered packets. Also compare TCP versus UDP for wireless delivery.

Describe, draw and explain the architecture of IoT with its key components with neat sketch/diagram.

Explain Bluetooth piconet, scatternet and protocol stack. Discuss the interface between IEEE 802.11 and Bluetooth.

Explain WiMAX PHY layer and MAC layer as per IEEE 802.16 fixed and mobile standards.

Introduce 3GPP and explain LTE and LTE-A standards, including LTE uplink and downlink communication with suitable architecture.

Explain technologies for sensor nodes and networks, operating environment and underwater WSN.

Explain and compare TCP variants for mobile/wireless networks: Indirect TCP, Tahoe, Reno, New-Reno and Vegas.

Write short notes on any two of the following: a) GAGAN system and its purpose/role in navigation and geolocation services b) Geolocation service techniques and standards c) GPS-aided GEO augmented navigation d) E.911 location service.