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Transcript of 1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 9/2008 Avo Ots telekommunikatsiooni õppetool, TTÜ...
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Kommunikatsiooniteenuste arendusIRT0080
Loeng 9/2008
Avo Otstelekommunikatsiooni õppetool,
TTÜ raadio- ja sidetehnika [email protected]
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Mobile Computing: Why?
Streaming Movies
E-learning
Home Security Gambling
Home medical
care
Sports
Nokia E61
Military Response
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Markets for IP Mobility
[Source:Cisco]
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Mobile Wireless Devices
Laptop Smartphone Media Player Palmtop
Personal Digital Assistant
Notebook PagerGaming Console
Digital Camera
Mobile Router
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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
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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
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Tavalahendus
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Lahendus multihop
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Unicast-Routing Protocol for MANET (Topology-based)
Table-Driven/Proactive
Hybrid On-Demand-driven/Reactive
Clusterbased/Hierarchical
Distance-Vector
Link-State
ZRP DSRAODVTORA
LANMARCEDAR
DSDV OLSRTBRPFFSRSTAR
MANET: Mobile Ad hoc Network
(IETF working group)
Routing Protocols for MANETS
CBRP
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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
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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)
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Lingid (1)http://en.wikipedia.org/wiki/Ad_hoc_routing_protocol_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/adhoc-routing1.pp