IEEE 802.21 MEDIA INDEPENDENT HANDOVER
DCN:
Title:
Date Submitted:
Authors or Source(s):
Johannes Lessmann (NEC)
Burak Şimşek, Christian Niephaus (Fraunhofer Institute)
Antonio de la Oliva (UC3M)
Abstract: Show first set of extensions needed for 802.21
to use it to run wireless (multi-hop) backhauls
21-09-0071-00-0000
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21-09-0071-00-0000
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How it all began: EU Project CARMEN
Network
operators
Academia /
research institutes
Equipment
manufacturers
Goals of CARMEN
• Enable heterogeneous (multi-hop) wireless backhaul
networks including mesh topologies for operator
deployments
• Media independence layer (code once, run anywhere)
• Develop working testbed
 Define media abstraction layer for higher-layer services
 Provide additional information to higher layers like
neighborhood information and radio configuration
 Use existing IEEE 802.21 primitives and make minimum
enhancements
• Issues and solution approaches were presented in 3
previous meetings to 802.21 WG (first time in Nov 08)
CARMEN Use Case Scenarios
“Stadium”
 low-cost, short-term provisioning of additional
wireless access capacity
 triple-play QoS requirements
Emergency Response Support
 severe capacity constraints
 intermittent connectivity to core network
 sub-optimal node placement
 focus on group-communication
Internet
More Everyday-like Scenario
Microwave
3G
WiFi
LinkNet Macha Project in Zambia
• Villages and the houses within
those villages are scattered
across a large land
• No wired communication
• No reliable power supply
• Limited hardware resources
• Limited budget
• Target: Deploy a heterogeneous wireless backhaul which is
reliable enough to provide affordable connection throughout
the country
• First devices have been deployed by Fraunhofer Institute in
September 2009
Why 802.21?
•
•
•
•
It offers media independence (very essential)
It specifies many of the needed primitives already
Its architecture suits backhaul O&M very well
However, there are still points missing to enable
wireless backhauls and some new primitives would be
needed
 We have prepared a discussion document about
anticipated 802.21 extensions (DCN: 21-09-0106-01-0000)
– Will probably need further extensions and study, so other
companies should join discussions
Tentative Extension Areas
• Node and topology discovery
• Propagate backhaul specific information (topology,
capabilities of individual nodes, actual/possible settings...)
• Detect new backhaul neighbors
• Registration of new nodes
• Radio configuration
• Detect radio interfaces and capabilities, get/set current values
• Monitoring
• Resource constraints
• Per-flow granularity for handovers
Increasing Interest
• More companies have indicated their interest in media
independence for heterogeneous wireless backhaul networks
in the meantime:
– France Telecom
– AT4 Wireless
– i2CAT
• We received an official support letter for our work from Andy
Haworth, FMCA Managing Director
• Several motions and strawpolls in previous meetings (since
Nov 08) have shown strong interest within the WG
– e.g. straw poll in July ‘09 meeting: 16 yes, 0 no, 2 abstain
Conclusion
Extend 802.21 to wireless backhaul networks
– Business interest (operators, vendors: DT, BT, FT, ALU,
NEC, FMCA, Redline, StrixSystems)
there is an industry interest
– Much already there, fairly limited extensions/effort
 802.21 is a very promising vehicle
– The WG has expressed positive interest for several
meetings
– Possible overlap with TVWS (e.g. radio configuration)
 Study Group within 802.21 should be created to
further elaborate and attract more stakeholders