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GSC9/GRSC_017. Ad Hoc Networking  . GSC-9, Seoul. 1. Initial Architectures. - Low power sensors networks “surveillance” web - small, relatively static, embedded ad hoc networks `“bluetooth-type” networks - Small-to-medium sized, mobile ad hoc networks “802.11-style”. Terminlology .

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Ad hoc networking l.jpg

GSC9/GRSC_017

Ad Hoc Networking  

GSC-9, Seoul

1


Initial architectures l.jpg
Initial Architectures

- Low power sensors networks

“surveillance” web

- small, relatively static, embedded ad hoc networks

`“bluetooth-type” networks

- Small-to-medium sized, mobile ad hoc networks

“802.11-style”

GSC-9, Seoul


Terminlology l.jpg
Terminlology

Mobile Ad Hoc Networking =

= Mobile, Multi hop, Wireless Networking

= Mobile Mesh Networking

= Mobile Packet Networking

GSC-9, Seoul


Ad hoc network applicability l.jpg
Ad hoc network applicability

Scale

Small scale Large scale

Network type (few nodes) (many nodes)

Commercial home/office personal mobile cellular like

industrial local

networks

Government specific Public Safety Large-scale military

network

Community/urban “covert” networks local communications

networks

GSC-9, Seoul


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Hybrid Communication Networks

Satellite overlay

High speed

backbone

network

MANET

No fixed infrastructure Fixed/static infrastructure

GSC-9, Seoul


Ietf manet standardization l.jpg
IETF MANET standardization

  • MANET - established in 1997 chartered working group within Internet Engineering Task Force (IETF)

  • Focussed on studying routing specification with the goal of supporting network scaling up to hundreds of routers

    * Unicast routing protocol

    * Multicast routing protocol

  • Work on routing for large and small scale networks

  • Work relies on the existing IETF standards such as mobile-IP and IP addressing

  • For large-scale MANET the lack of interest have put this work in question

  • Flooding: work on requirements had started

GSC-9, Seoul


Mobile ad hoc networking manet l.jpg
Mobile Ad Hoc Networking (MANET)

  • Dynamic topologies

  • Bandwidth-constrained

  • Asymmetric links with variable capacity

  • Energy constrained

  • Multiple technologies can be used simultaneously

GSC-9, Seoul


Open issues l.jpg
Open issues

  • A optimisation network layer and radio layers for different systems (incl. 802.11, HiperLAN)

  • B QoS support

  • C secuirity

  • D mobility

  • B, C, D issues could be orthogonal, joint optimization is very difficult (system design choice)

  • tradeoff between centralized and distributed algorithms for B,C,D

GSC-9, Seoul


Relevant etsi activities l.jpg
Relevant ETSI activities

  • MESA Project - ad hoc network on future Public Safety communications

  • BRAN - HiperLAN-2, other

  • 3GPP - UTRA TDD

    Standardization challenges =>

    There is need for standard-based approach at the network layer.

GSC-9, Seoul


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