Self-Organization Networks for Disaster Relief
IEEE 802.16 Presentation Submission Template (Rev. 9)
Document Number:
IEEE C802.16gman-10/0015
Date Submitted:
2010-05-05
Source:
Sungkyung Kim, Sungcheol Chang , Hyun Lee,
E-mail: {cyrano, scchang, csyoon}@etri.re.kr
Eunkyung Kim, Soojung Jung, Jaesun Cha, Chulsik Yoon
ETRI
Venue:
IEEE 802.16 Sesstion #67 Bangalore, India
Base Contribution:
None
Purpose:
To assist the 802.16 GRIDMAN SG to define system requirements for 802.16n standard
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Introduction
• According to the PAR [1],
“This amendment specifies protocol enhancements to the IEEE802.16 MAC
for enabling increased robustness and alternate radio path establishment
in degraded network conditions. Limited OFDMA PHY extensions are
included for enabling operation with radio path redundancy and direct
communication between subscriber stations. Also mobile base stations and
mobile relay stations are supported.”
• And, GRIDMAN SG has discussed some usage cases [2].
Among them, we focus on disaster recovery when the ground
based communication infrastructure suffers a local or widely
destruction.
Usage model
• A Disaster may destroy existing communication infrastructures.
And, it can bring about heavy congestion.
– Natural disaster: volcano, earthquake, tsunami, hurricane, etc.
– Man-made disaster: war, terror, big fire, building collapses, etc.
Disaster Relief
• After a disaster, we have to consider the capability and coverage of BS in a
disaster area for rescue and search within a short time.
– Establishing temporary BSs/RSs to resolve call-congestion and to recover a degraded
communication network.
– Utilizing enhanced relay stations and multimode stations to assist incomplete BS, to
support alternative paths, and to fill coverage holes in a disaster area , etc.
Key Requirements
•
•
•
•
Multi-mode station
Mobile Base station
Dynamic Self-Organization Network
Ability to operate without an attached
infrastructures
Multi-Mode Station
• 802.16n shall support a multi-mode station to operate as
another station temporarily.
– Type
• Multimode MS: supporting the functions of RS or BS.
• Multimode RS: supporting the functions of BS.
– Features (compared with normal infra-stations)
•
•
•
•
Compact sized-hardware
Limited transmission power
Limited functions
Data source/sink terminal (Multimode MS)
– Mode Change
•
•
•
•
Sensing network states/infra-stations
deciding a role
Dynamic re-configuration
With/without infrastructure
Mobile Base Station
• 802.16n shall support a mobile base station which is loaded
onto a vehicle to operate in a wide disaster area.
– Types
• Nomadic base station
• Full mobile base station
– Technical issues
•
•
•
•
•
•
•
Dynamic network configuration
Handoff with normal base station
Ability of BS to measure radio link
Interference mitigation
Frequency allocation
Wireless backhaul communication
detached from infrastructures
Others
• Stand-alone network
– 802.16n shall support a stand-alone network to operate without an
attached infrastructures.
• Protocol termination at stand-alone BS
• Local authentication & authorization
• Resource efficiency
– Direct communication between subscriber stations
• Link adaptation
• Synchronization
Summary
• Key technologies for disaster relief
– Multimode station
– Mobile base station
– Stand-alone network
– Self Organization Network
References
[1] IEEE 802.16gman-10/0018r2, “Draft PAR and Five Criteria from Greater
Reliability in Disrupted Metropolitan Area Networks (GRIDMAN) Study
Group,” March 2010.
[2] IEEE 802.16gman-10/0019r1, “NRR Draft Report,” March 2010.
[3] IEEE 802.16gman-10/0014, “Group Calls and Multicast Operation for
Public Safety and Public Protection”, May 2010.