IWS 2005 Tuesday

Home Networking: Sudhir Dixit, Research Fellow, Nokia Research Center
Home Networking; the next frontier (not the final frontier, coz thats been reserved for space)

DLNA consortium
DLNA Vision, promote interoperaability between home networked devices.

Media Exchange protocols for home networks, Edwin Heredia, Microsoft

Location based services, Paul Wisner, Nokia
Based on Nokia 6630, uses Discovery Protocols: Bluetooth SDP and UPnP
Others: SLP and JINI
Nokia Approach: Everything is aware of its own location, proximity is determined by comparisn
Map location to position, position determined from GPS, WLAN triangulation etc.
Desktop on mobile device shows reachable services

Usable Security in Smart Homes, Saad Shakshir, Nokia Research

Hot Topics: MIMO
What is MIMO?
Definition: MIMO

IWS2005 Tues Afternoon

Duplicate Address Detection in OLSR networks, Thomas Clausen, Inria

MANETS: Mobile Adhoc Networks, do not comply with traditional internet hypothesis
Networks split and re-combine and may cause address conflicts.
DHCP is statefull , server based and sensitive to partitioning
IPV6 also has similar problems
Pro-active protocol
Inspired by NOA OLSR and PACMAN
The proposed solution is to use link state messages to determine the occurance of duplicate addresses and initiate self address change in case of detection

AD-hoc network applcations and technical issues, Dude from Hitachi
3 uses for ad-hoc:
specialized, e.g miltary, emergency, disaster
enterprise e.g. office, home
consumer e.g. community
Town security System with wireless cameras, Tracking, Cellular phones using ad-hoc networking to bypass network
ITS service systems
3 test systems
Security system with 8 olsr nodes, cameras and pda
Car mobile network with auto handover between wilan and cellular, using olsr and mobile IPv6

Future of Wireless

Future of Wireless
Cognitive Radio, implemented using software radio, to improve freq utilization
Ubiquitous networking, networking everything (man and machine)
RFID, sensor networks

IWS 2005 Monday Afternoon notes

MOCCA: Summary of think-tank
Focus is on Asian developing market, particularly India and China.
Debate between whether investment into existing technology in rural sector of mobile market will have better returns than further urban investment into new technology.
Debate on whether voice or data services are more important in rural areas.
Debate on what a rural area is? Low density population?

Mobile Handover Strategies, A. Slingerland
Mobility management scheme supports multiple strategies and smartly selects best strategy which will improve QoS
Application requirements; latency, loss, re-ordering
Context issues; link layer hints, network support nodes, load
Hierarchical Mobile IP
Static handover is sub-optimal

Distributed QoS control Arch for latency sensitive applications, Mahbubul Alam
QoS, multi-layer challenge
Basic Challengers: BW, Delay and Jitter
Arch challenges: Scalabity, Resource management, Robustness against traffic fluctuations, Billing, Security
Seamless security needs to be included in design along with QoS.
Security can provide QoS, e.g. ipsec, however not scalable
QoS routing policy

M. Canales ([email protected])
Shortest path not necessarily QoS, resource utilisation at MAC layer more important
New QoS metric based on Mac resources
Basis: AOMDV
ADHOC MAC protocol
Destination selects best path after receiving multipath info / metric
Simulation: Event driven simulator in c++ ( Adhoc MAC + modified aomdv+path bandwidth calc algorithm)
Best effort strategy: AODV
QoS metric based strategy QoS Routing, AOMDV

Distributed Admission Control Algorithm
IEEE 802.11e EDCA QoS Concept

QoS relate to RT and non-Rt services, which may have contrasting delays and reliability requirements, flexible QoS management required.
Proposed system based on ITU-R
Vertical and horizontal handover

Notes taken: Exec Round Table Discussion

Dude from Siemens:
Performance increase by 100X every 5 yrs
Experimentation currently at 1Gbs

Higher frequencies aimed at for 4g have less coverage.

Dude from board of every 4 letter acronym known to man:
(KDDI R&D) Dr. Yasuo Hirate

Japan uses W-CDMA (90 mil users)

Aimed at 100Mbs by 2010

Fixes mobile convergence
Seamless network of mobile and wireless lan
Integration, Seamless, Barrier Free
Convergence of Fixed, Wireless, Cellular and Digital Broadcast

Dude from Qualcomm, formerly AT&T Bell Labs:
Anil Kripalani
Ubiquitous Search and Discovery

Coming soon: Phones with hard-disks and 7.1 Mega pixel camera

Dude from Nokia:
Dr. Jan Bosch
“Lifepod” – Record everything

Dude from Saumsung:
Dr. Young Kyun Kim
Telecoms and Broadcasting convergence
4g : IP Ubiquitous Network
Mobile terminal as gateway to WiLan, BT, RFID, IrDA and IP Network
IPv6 based network
2 paths to 4G, 1 is the cellular path 1G, 2G, 3G ( , 2nd path is the “nomadic” path, wlan, BT, Zigbee, RFID ( 4G
WiBro (Mobile WiMax), ubiquitous networks in Korea
Apec summit in Nusan Korea will demo large volume VoD, MoD

Dude from Intel:
Dan Dahle
3g for WAN
WiMax for MAN
WiFi for LAN
UWB and BT fot PAN
Wireless Requirement
Throughput, Latency, tolerance for loss, mobility, interference, capacity, bandwidth, throughput, power consumption, complexity

Dudette from Alcatel:
Simplicity, continuum of service
Heterogeneous Access Management required for multiple radio systems.
Multi-radio terminal, transparent to user and power-wise
IMS architecture enabler of new applications

4G is a network of networks, it is a solution looking for a problem.
Terminal has to accommodate converged radio networks.
“The user wants to google cnn anytime, anywhere at the right cost having all security considered…”

International Wireless Summit 2005

International Wireless Summit 2005, Aalborg, Denmark

The international wireless summit has just kicked off and I have the privilege of being amongst some of the greatest think-tanks in the wireless arena.

The aim of the IWS is to offer a platform for establishing exchanges of information between universities, industry and science parks. The next summit will be in 2008 in Helsinki, Finland.

International Wireless Symposium aims to exchange research information. 450 papers to be presented on “hot topics”.

Prof. Ramjee Prasad giving introductory speech.

Prof. Ramjee Prasad predicts that the future of wireless comms will be based on single layer technology, not quite sure what is meant by this though.

“Personal Networks are going to be of major importance in future business…”

The next Big thing….

Mobile companies have spotted it a while ago and its already filtered through to service providers in the form of “look-for-me” type services. But one company has just launched location based services and perhaps the Internet to a whole new level; Hello Google Earth. Its been a while since anything in the pc/cyber world has slapped a wow at me and it was worth the wait! The uses are already incredible and the possibilities are amazing. Imagine browsing the net by finding pages based on where they’re physically kept, like spinning the globe to Google headquartes to launch a google search?

Have to interrupt this transmission, but will resume later…

Its ALIVE!!!!

In just a few weeks the mesh has grown considerably and will hopefully continue to do so. Viva le revolution!!!


One of the projects that are being undertaken at work that has caught my personal interest is the “Community Owned Information Networks” project(See Project Website and COIN Blog). The aim of the project is to research the use of wireless communication technology, usually used in typical 1st world environments such as offices or neighbourhood networks, in a 3rd world, African context. Networks have been set up in rural villages, linking clinics to hospitals and encouraging rural communities to connect themselves to the networks, by demonstrating the use of alternative, cheaper equipment such as cantenna’s. As part of the research an outdoor mesh network was setup in Pretoria and findings form this network are continuously passed back to the rural implementations. Furthermore, a 50 node, indoor network is being setup to further encourage research into mesh networking, including protocol level research.

Although I’m not currently active in the project, I have been keeping up with developments and while scanning the activity around Mesh networking in South Africa, came accross the Johannesburg Areas Wireless users Group, JAWUG.I thus saw an opportunity to experiment with the technology and join the revolution by setting up my own node as well as an opportunity to contribute findings between the CSIR and JAWUG networks. Its a real pity that there isnt any communication/collaboration between the two groups, because of somewhat irresponsible/ childish? ramblings of a core JAWUG member, all of whose critisms are not totally unfounded, but are mostly uninformed. The fact is that the Meraka insitute is only a few months old, taking its name from the CSIR’s Open Source Center, which was merged into the new institute. Meraka’s interests incorporate ICT’s in general, of which connectivity is one theme in pool of many including Human Language Technology, Advanced Computing and Accessibilty. The research into mesh networking is one sub-project within the Wireless Africa project, which itself falls into the connectivty theme.

Afer communicating with nearby interested parties, which I found through the JAWUG and NodeDB websites , buying and setting up equipment, I finally found myself connected…

The following is a network diagram, generated by a routing protocol (OLSR) used on my mesh node.