1. 1 An Introduction to Institute for Information Industry (III) and IEEE 802.16j simulation module WiMAX Technology Center Networks and Multimedia Institute Institute for Information Industry Howard Lin 2007/10/24

2. 2 Agenda Introduction to III and WiMAX Technology Center IEEE 802.16j WiMAX Relay Networks Overview III’s status of NS-2 Simulation Collaboration with AATG

3. 3 Introduction To III The Institute for Information Industry (III) was established in 1979 as a non-profit organization, for the purpose of growing and strengthening Taiwan's information industry development. –Jointly sponsored by the Taiwan government and dozens of prominent private enterprises III’s mission has evolved from IT to ICT (Information and Communications Technology) development, with coverage expanding from ICT industries to entire society. III employs approximately 1,500 personnel, and approximately 70% hold master's or doctoral degrees.

4. 4 Networks and Multimedia Institute Networks and Multimedia Institute (NMI) is the primary ICT technology research organization within III. Its current research areas include Wireless Access, Ubiquitous Networks, Content Sharing, Digital Home, Context-aware Service Platforms, Sensor Networks, and Smart Mobile Devices.

5. 5 Networks and Multimedia Institute PAO-CHUNG HO Vice President and General Director CHIA-HSIANG CHANG General Director Operation Support Department Information Security Technology Center Mobile Multimedia Technology Center WiMAX Technology Center Environment Sensing and Control Technology Center Mobile Communication Technology Center Market and Business Promotion Department Technology Plan Department CHUN-DER WU Advisor

6. 6 III Plays a Key Role in Taiwan WiMAX Ubiquitous Society, National Competitiveness M-Taiwan WiMAX Test Lab WiMAX Operator WiMAX Chipset Vendor WiMAX Product Vendor WiMAX Test Capability WiMAX Standard Contribution WiMAX BS SW Core Tech

7. 7 WiMAX Activities in III WiMAX Center WiMAX SS/BS Software Development –16d/e/j BS/RS system integration and R1/R6 interoperability –Real credit from international WiMAX plugfest (16d/e) –Help Taiwan manufacturers build WiMAX product development and integration capabilities Participate in IEEE 802.16j/m Standardization Activities –Co-propose key contributions with 1st-tier global companies –Focus in usage models, technical requirements, MAC layer, and system profile Establish “M-Taiwan WiMAX Testing Center” –Include WiMAX PCT, RCT, and IOT for 802.16d/e CPE and BS –Develop WiMAX test cases along with commercial test equipments –Help Taiwan WiMAX laboratories build WiMAX test capabilities and win WFDCL (WiMAX Forum Designated Certification Laboratory) Direct links to the local/global academia –Co-operate with Universities and do research in WiMAX field

8. 8 NS-2 WiMAX module project in III The NS-2 Project is a research-oriented project under WiMAX Center in III –It’s a small project to do research on academic issues. –Provide a good platform to verify the performance for advanced algorithms. Had been co-operating with Chang-Gung Univ. (CGU) since 2006 –CGU’s previous work : http://ndsl.csie.cgu.edu.tw/wimax_ns2.phphttp://ndsl.csie.cgu.edu.tw/wimax_ns2.php –It is another popular WiMAX module for NS-2. –The paper entitled “The Design and Implementation of WiMAX Module for ns-2 Simulator ” has been presented in Proc. ACM VALUETOOLS 2006 in Pisa, Italy. Starting from 2007 –Leverage past experience, based on NIST’s prereleased-041507 –Team Members : Frank Tsai, PhD. (Manager) Howard Lin (project lead) Cheng-Jung Lin Francis Lien Yeng-Chieh Cheng

9. 9 An overview of IEEE 802.16j

10. 10 Concept of Multihop Relay Lower CAPEX & OPEX approach to expand WiMAX infrastructure Coverage extension at cell edge Penetration into inside room Shadow of buildings Coverage hole Underground Valley between buildings Coverage extension to isolated area Multihop Relay Mobile Access BS RS Problems: 1. Shadow of buildings 2. Valley between buildings 3. Coverage extension at cell edge Problems: 1. Shadow of buildings 2. Valley between buildings 3. Coverage extension at cell edge

11. 11 802.16j Multi-hop Relay Aiming at developing relay mode based on IEEE 802.16e, to gain: –Coverage extension, and –Throughput enhancement

12. 12 16j Relaying Methods Non-transparent RS A non-transparent RS transmits preamble, FCH, DL-/UL-MAP, and DCD/UCD MS recognizes the non-transparent RS as a BS Centralized scheduling or distributed scheduling Capacity enhancement & range extension Transparent RS A transparent RS does not transmit preamble, FCH, DL-/UL-MAP, and DCD/UCD MS never recognizes the transparent RS as a BS Centralized scheduling at MR-BS Capacity enhancement only UL only RS or UL/DL RS Source: 16j TG, 80216j-06_132

13. 13 III’s Contribution in 16j Standardization of 802.16j is in final stage –1st draft have been official released by IEEE 802.16 in Aug 2007 –There are many major contributions and essential IPRs owned by III –802.16j standard will be finalized and approved by IEEE 802 in Q1 2008 170 1st-author contributions have been submitted –Reference: http://relay.wirelessman.org/http://relay.wirelessman.org/ 67 contributions have been approved as standard baselines –Approval rate: 39.41% (of III’s 170 contributions) –37.85% of total approved contributions in 16j (177 approved contributions in total)

14. 14 III’s status of NS-2 Simulation

15. 15 What we did and have done Studies NIST’s architecture and CGU’s –Our team decide to follow NIST’s, which integrate into AATG’s Enhanced code from NIST’s prereleased-041507 –Support sleep Mode –Partially 16j Relay Sleep mode –Finish Power saving class of type I –A paper about 16e power saving using sleep mode module was published in a Taiwan local conference WASN 2007. –Add TCL interfaces Initial-sleep window Final-sleep window base Listening window Final-sleep window exponent –Add Timers WimaxT43Timer WimaxSlpTimer –Add messages MOB_SLP-REQ MOB_SLP-RSP MOB_TRF-IND

16. 16 What we did and have done (con’t) IEEE 802.16j development –16j implementation base on IEEE-std 16j/D1 (Aug. 2007) –Transparent, UL-only, centralized scheduling Relay mode –Add a Relay component by modifying BS and MS –Finish partial 16j message exchange process AATG Release 2.1 package verification –We have installed the package and it works fine for us –Cost 231 model seems to be more realistic, but may have some issues in wireless-phy. –Continue to feedback

17. 17 RS Initial RNG RS initial ranging with MR-BS RS will start by sending a randomly selected CDMA-Initial Ranging Code. Then RS will finish ranging process by exchange RNG- REQ/RSP.

18. 18 RS Registration RS has to continue registration process followed by successful ranging.

19. 19 MS/SS initial RNG After MS launches, RS has to forward messages and act as a middle man to help communicating with MR-BS. MR-BS can send Downlink messages to MS directly, but MS can not reach MR-BS in Uplink direction due to Tx power limitation.

20. 20 MS/SS Registration MS will perform registration process assisted by RS. After the connections been established, the MS can transmit data to MR-BS without knowing the existence of RS.

21. 21 What III plan to Do Continue our efforts to develop WiMAX NS2 platform –In addition to 802.16j standard participation, we also plan to participate in 802.16m. (and see the need to have a simulator for system simulation for our product development) As NS2 is a shared, open resource, we do our development based on others work and also happy to contribute ours in returns. In addition to 802.16e, we plan to keep on the development of 802.16j MR MAC modules Spend time on verifying the preliminary Release 2.1; In the mean time, we will also consider the impact on porting 16j into the new structure. After the Release 2.1 verification, we can discuss about how we can contribute to next release version.

22. 22 Collaboration with AATG Collaboration –Share experiences with each other –Leverage the resources and capacity III’s mission –Focus on 16j module development based on 16e and OFDMA module –Supporting sleep mode (Type I) in 16e NS-2 weekly meeting by con calls –Time difference in Taipei Eastern Time, U.SPacific Time, U.STaipei Time, Taiwan

23. 23 Thank You! Any Questions ? E-mail : ihlin@nmi.iii.org.twihlin@nmi.iii.org.tw Howard Lin

24. 24 Tree Structures for Relay, not Mesh Requirements: –PMP mode compatible –16e mobile station (MS) Support –<- Those are not supported by current 16-mesh thus require new spec. Source: 16j SG Tutorial, 80216mmr-06_006 Source: 16j TG, 80216j-06_015

25. 25 Tentative Schedule of 16j Source: IEEE 802.16