1. 21-09-0071-00-00001 IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-09-0120-00-0000 Title: Wireless Backhauls based on IEEE 802.21 Date Submitted: July 14, 2009 Presented at IEEE 802.21 session #33 in San Francisco Authors or Source(s): Johannes Lessmann (NEC) Burak Simsek, Christian Niephaus (Fraunhofer Institute) Abstract: Show first set of extensions needed for 802.21 to use it to run wireless (multi-hop) backhauls

2. 21-09-0071-00-00002 IEEE 802.21 presentation release statements This document has been prepared to assist the IEEE 802.21 Working Group. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE ’ s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE ’ s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21. The contributor is familiar with IEEE patent policy, as outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> Section 6.3 of the IEEE-SA Standards Board Operations Manualhttp://standards.ieee.org/guides/opman/sect6.html#6.3 http://standards.ieee.org/board/pat/guide.html

3. How it all began: EU Project CARMEN Network operators Equipment manufacturers Academia / research institutes

4. Goals heterogeneous carrier grade (multi-hop) wireless backhaul networks including mesh topologies Media independence layer (code once, run everywhere) Develop working testbed  Define media abstraction layer for higher-layer services  Provide additional information to higher layers for things like neighborhood information and radio configuration  Use existing IEEE 802.21 primitives and make minor enhancements Issues and solution approaches were presented in 3 previous meetings (first time in Nov 08)

5. 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

6. More Everyday-like Scenario PasoLink3GWiFi

7. 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 wireless backhaul which is reliable enough to provide affordable connection throughout the country

8. LinkNet Macha Project in Zambia Approach: Develop a satellite based backhaul and use dvb + wimax + wifi where appropriate Develop individual “sites” for each relatively dense population and connect sites again through wireless media Enable flexibility through mesh since There is no dedicated bandwidth, which costs a lot (€5500 pro 1Mb/s) There is no reliable power supply, hence none of the nodes are considered as reliable Few technicians to deal with any kind of network and hardware problems – Extend the coverage to the entire country and then to others Mozambique, Tanzania, Kenya, Zimbabwe, South Africa, Malawi…

9. An example “Site” in Macha The network is evolving as much as the financial and technical conditions let

10. So, … IEEE 802.21 offers many of the mechanisms required for the described scenarios However, there are still points missing to enable wireless backhauls  We have prepared a document about anticipated 802.21 extensions (see doc server) – Gives already a detailed first impression – Will probably need extensions and further study, so other companies should join discussions

11. Tentative Extension Areas Node and topology discovery Propagate mesh specific information Detect new backhaul neighbors Registration of new nodes Radio configuration Detect radios and capabilities, get/set current values Monitoring Resource constraints Per-flow granularity

12. Conclusion Extend 802.21 to wireless backhaul networks – Business demand (operators, vendors: DT, BT, ALU, NEC, FMCA [cf. Andy], Redline, StrixSystems) – Much already there, fairly limited extensions/effort – EU project dedicated to contribute (“free” man power, diverse input), follow-up project under discussion – Overlap with White Spaces, complements Emergency Services  We need a Study Group within 802.21