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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
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
Introduction To III• The Institute for Information Industry (III) was established in 1979 as a no
n-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
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
Networks and Multimedia Institute
PAO-CHUNG HOVice President andGeneral Director
CHIA-HSIANG CHANGGeneral Director
Operation SupportDepartment
Information SecurityTechnology Center
Mobile MultimediaTechnology Center
WiMAX TechnologyCenter
Environment Sensing and Control
Technology Center
Mobile CommunicationTechnology Center
Market and Business Promotion Department
Technology Plan Department
CHUN-DER WUAdvisor
6
III Plays a Key Role in Taiwan WiMAX
Ubiquitous Society,National
Competitiveness
M-TaiwanM-Taiwan
WiMAXTest Lab
WiMAXOperator
WiMAXChipsetVendor
WiMAXProductVendor
WiMAXTest Capability
WiMAXStandard
Contribution
WiMAX BSSW Core Tech
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 int
egration 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 syste
m 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 wi
n WFDCL (WiMAX Forum Designated Certification Laboratory) • Direct links to the local/global academia
– Co-operate with Universities and do research in WiMAX field
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.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
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
RS
RS
RS
RS
RS
Problems:1. Shadow of buildings2. Valley between buildings3. Coverage extension at cell edge
Problems:1. Shadow of buildings2. Valley between buildings3. Coverage extension at cell edge
11
802.16j Multi-hop Relay• Aiming at developing relay mode based on IEEE 802.16e, to gain:
– Coverage extension, and– Throughput enhancement
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
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 200
8• 170 1st-author contributions have been submitted
– Reference: 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 contributio
ns in total)
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 conferen
ce 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
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
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.
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
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
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
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.S Taipei Time, Taiwan
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
Tentative Schedule of 16j
Year Month 802.16 SessionActions2007 May #49 Interim 7th TG meeting
July #50 Plenary8th TG meeting, Comment ResolutionsPreparation for the Initial WG Letter Ballot
Initial Draft Completion, 1st WG Letter Ballot
September #51 Interim9th TG meeting, Comment ResolutionsPreparation for the 2nd WG Letter Ballot
2nd WG Letter Ballot
November #52 Plenary10th TG meeting, Comment ResolutionsPreparation for the 1st Sponsor Ballot
1st Sponsor Ballot
2008 January #53 Interim11th TG meeting,Sponsor Ballot Comment Resolutions
Sponsor Recirculation
March #54 Plenary12th TG meeting,Sponsor Ballot Comment ResolutionsEC Approval to Submit to RevCom
RevCom Approval*SA Approval
*Submission for RevCom approval will come after REV2 completed.
Source: IEEE 802.16