SMUDE BSc NT 1 – Wireless and Mobile Communication Assignment
Bachelor of Science in Network Technology (B.Sc. NT) – Semester 5
BNT501 – Wireless and Mobile Communication – 4 Credits
(Book ID: B1485)
Q1. Brief the Fourth generation network. List its advantages and disadvantages?
Answer: - A 4G system is expected to provide a communication technology based on Internet Protocol. Internet protocol or IP is generally used in the computer networks for data communication among computers. All the devices are identified by a number called IP number. In 4G network this concept is extended to telephony with an intention to make data and voice communication integrated in the same architecture. The 4G network is supposed to facilitate a Gigabit speed i.e. a speed of 100+ Mega Bytes per second with a mobile node speed of up to 200km/hr. It will enable Internet access, IP telephony, gaming services, and streamed multimedia using the same infrastructure. This generation of wireless system is based on packet switched communication with wide coverage and high throughput. The 4g wireless uses Orthogonal Frequency Division Multiplexing (OFDM), Ultra Wide Radio Band (UWB) and Millimeter wireless. The frequency band used in 4G is 2-8 GHz.
Advantages of 4G network
4G will be based on packet switching only thus requiring low latency data transmission.
4G will have IPv6 to support a large number of wireless-enabled devices.
4G allow seamless mobility, thus a file transfer is not be interrupted incase a terminal moves from one cell (one base station coverage area) to another, but handover is carried out.
While maintaining seamless mobility, 4G will offer very high data rates with expectations of 100 Mbit/s wireless services.
Cars are also going to be impacted by 4G technologies in the future. As 4G networks expand, it is expected that the navigational devices that are in vehicles (GPS) will always be online and not contain simply uploaded pictures of maps. They will be able to correct themselves and notify the