Mobile ad hoc networking with a view of 4G wireless: Imperatives and challenges

1. Mobile ad hoc networking with a view of 4G wireless: Imperatives and challenges Myungchul Kim mckim@icu.ac.kr Tel: 042-866-6127

2. by J. Liu and Imrich Chlamtac, Ch 1 of Mobile Ad Hoc Networking, Wiley-Interscience, 2004. • Introduction • Mobile devices • The worldwide number of cellular users has been doubling every 11/2 years. • The number of mobile connections and the number of shipments of mobile and Internet terminals will grow by another 20-50%. -> the total number of mobile Internet users soon to exceed that of fixed-line Internet users. • Situations in which user-required infrastructure is not available, cannot be installed, or cannot be installed in time in a given geographic area. -> mobile ad hoc network. • Ad hoc networking: the 4G network architecture.

3. Review of wireless network evolution • Wireless communication characteristics

4. Review of wireless network evolution • Wireless communication characteristics

5. Types of wireless networks • By network formation and architecture: infrastructure-based network, Infrastructureless (ad hoc) network. • By communication coverage area: • wireless wide area networks (Wireless WANs) e.g., cellular networks • wireless metropolitan area networks (Wireless MANs) e.g., local multipoint distribution services (LMDS), multichannel multipoint distribution services (MMDS) and IEEE 802.16 • wireless LANs e.g., 802.11 (Wi-Fi) and Hiperlan2 • wireless personal area networks (Wireless PANs): 10 meter range, e.g., Bluetooth and infrared light. • By access technology • GSM, TDMA, CDMA, Sattellite, Wi-Fi, Hiperlan2, Bluetooth, Infrared. • By network applications • Enterprise, Home, Tactical, Sensor, Pervasive, Wearable Computing, Automated Vehicle Networks.

6. Table 1.1

7. Table 1.1 – cont’

8. Forces driving wireless technology evolution • The need to integrate various types of wirless networks • The need to integrate wireless platforms with fixed network backbone infrastructure • The need to support high-speed multimedia services • The need for convergence in network infrastructure • The need to support high mobility and device portability • The need to support noninfrastructure-based networks • The need to add location intelligence • The need to lower the cost of wireless services • The need for greater standard interoperability.

9. 4G wireless architecture and capabilities • ]integrating different types of wireless networks with wireline backbone networks seamlessly and the convergence of voice, multimedia, and data traffic over a single IP-based core network. • Network integration • All-IP networks, e.g., VoIP • Lower cost and higher efficiency • Ultrahigh speed and multimedia applications • Ubiquitous computing • Support of Ad Hoc networking (MANET) • Location intelligence

10. Fig 1.1

11. Mobile Ad Hoc Networks • Characteristics and advantages

12. Table 1.2

13. Table 1.2 – cont’

14. Design issues and constraints • They are infrastructureless: brings added difficulty in fault detection and management. • Dynamically changing network topologies • Physical layer limitation: hidden terminal problem, collisions, packet loss • Limited link bandwidth and quality • Variation in link and node capabilities • Energy constrained operation • Network robustness and reliability • Network security • Network scalability • Quality of Service