23-04-19

Ad Hoc Networking  Ad Hoc Networking  

1 GSC-9, Seoul

SOURCE: ETSI (Project MESA)

TITLE: Ad hoc networking

AGENDA ITEM: GRSC#2 Item 5.3

CONTACT: Adrian Boukalov (adrian.boukalov@hut.fi)

GSC9/GRSC_017

GSC-9, Seoul

Initial ArchitecturesInitial 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 Terminlology

Mobile Ad Hoc Networking =

= Mobile, Multi hop, Wireless Networking

= Mobile Mesh Networking

= Mobile Packet Networking

GSC-9, Seoul

Ad hoc network applicability 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 networkCommunity/urban “covert” networks local communicationsnetworks

GSC-9, Seoul

Hybrid Communication NetworksHybrid Communication Networks

No fixed infrastructure Fixed/static infrastructure

MANETHigh speedbackbonenetwork

Satellite overlay

GSC-9, Seoul

IETF MANET standardization 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)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 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 activitiesRelevant 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.