Seade_8_5

mashpeemoveΚινητά – Ασύρματες Τεχνολογίες

24 Νοε 2013 (πριν από 3 χρόνια και 11 μήνες)

72 εμφανίσεις

1

Sideseadmed (IRT0040)

2.5 AP


Avo

LOENG
5

2

Mobile Computing: Why?

Streaming

Movies

E
-
learning

Home

Security

Gambling

Home

medical

care

Sports

Nokia E61

Military Response

3

Markets for IP Mobility

[Source:Cisco]

4

Mobile Wireless Devices

Laptop

Smartphone

Media Player

Palmtop

Personal Digital
Assistant

Notebook

Pager

Gaming Console

Digital Camera

Mobile Router

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

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

Tavalahendus

8

Lahendus
multihop


9

Unicast
-
Routing Protocol for
MANET (Topology
-
based)

Table
-
Driven/

Proactive

Hybrid

On
-
Demand
-
driven/Reactive

Clusterbased/

Hierarchical

Distance
-

Vector

Link
-

State

ZRP

DSR

AODV

TORA

LANMAR

CEDAR

DSDV

OLSR

TBRPF

FSR

STAR

MANET: Mobile Ad hoc Network


(IETF working group)

Routing Protocols for MANETS





CBRP

10

Proactive
v
s 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

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

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