1. 1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 9/2008 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee

2. 2 Mobile Computing: Why? Streaming Movies E-learning Home Security Gambling Home medical care Sports Nokia E61 Military Response

3. 3 Markets for IP Mobility [Source:Cisco]

4. 4 Mobile Wireless Devices Laptop SmartphoneMedia PlayerPalmtop Personal Digital Assistant Notebook Pager Gaming Console Digital Camera Mobile Router

5. 5 No mobility High mobility mobile wireless user, using same access point mobile user, passing through multiple access point while maintaining ongoing connections (like cell phone) mobile user, connecting/ disconnecting from network using DHCP. Moderate mobility Mobility Classification Protocols

6. 6 Mobility Micro Macro Global Intra-subnet Intra-domain Inter-domain Cellular IP (1998) TMIP (2001) TeleMIP (2000) Hierarchical MIP (1996) Hawaii (1999) Dynamic Mobility Agent (2000) HMIPv6 (2001) MIP (1996) MIPv6 (2001) Time (evolutionary path) Mobility Classification Protocols

7. 7 Tavalahendus

8. 8 Lahendus multihop

9. 9 Unicast-Routing Protocol for MANET (Topology-based) Table-Driven/ Proactive HybridOn-Demand- driven/Reactive Clusterbased/ Hierarchical Distance- Vector Link- State ZRPDSR AODV TORA LANMAR CEDAR DSDVOLSR TBRPF FSR STAR MANET: Mobile Ad hoc Network (IETF working group) Routing Protocols for MANETS CBRP

10. 10 Proactive vs Reactive Routing  Proactive Routing Protocols (DSDV, OLSR) + Routes to all reachable nodes in the network available. + Minimal initial delay for application. - Larger signalling traffic and power consumption.  Reactive Routing Protocols (DSR, CBR etc) + Smaller signalling traffic and power consumption. - A long delay for application when no route to the destination available

11. 11 Routing Protocols: Overview Proactive protocols –Determine routes independent of traffic pattern –Traditional link-state and distance-vector routing protocols are proactive –Examples: DSDV (Dynamic sequenced distance-vector) OLSR (Optimized Link State Routing) Reactive protocols –Maintain routes only if needed –Examples: DSR (Dynamic source routing) AODV (on-demand distance vector) Hybrid protocols –Example: Zone Routing Protocol (intra-zone: proactive; inter-zone: on- demand)

12. 12 Lingid (1) http://en.wikipedia.org/wiki/Ad_hoc_routing_proto col_list http://www.cs.cmu.edu/~dmaltz/dsr.html http://en.wikipedia.org/wiki/AODV http://www.olsr.org/?q=about http://www.ietf.org/rfc/rfc3626.txt www.cs.binghamton.edu/~nael/cs527/notes/ad hoc-routing1.pp