1. Support for Location Based Services IEEE 802.16 Presentation Submission Template (Rev. 9) Document Number: IEEE S802.16m-08/324 Date Submitted: 2008-05-09 Source: Mei-Dai Chen, I-Kang Fu, Yih-Shen Chen, Kelvin Chou, and Paul Chengdora.chen@mediatek.comdora.chen@mediatek.com MediaTek Inc.IK.Fu@mediatek.com No.1, Dusing Rd. 1, HsinChu Science-Based Industrial Park, paul.cheng@mediatek.comIK.Fu@mediatek.compaul.cheng@mediatek.com HsinChu, Taiwan 300, R.O.C. Chung-Hsien Hsu, Chao-Lin Chen, and Kai-Ten Fengstanley.hsu@mediatek.comstanley.hsu@mediatek.com NCTU/MediaTek Inc. 1001 Ta Hsueh Road, Hsinchu, Taiwan 300, R.O.C. Venue: IEEE 802.16 Session #55, Macao, China Base Contribution: IEEE C802.16m-08/324 Purpose: To be discussed and adopted by TGm into the P802.16m SDD Notice: This document does not represent the agreed views of the IEEE 802.16 Working Group or any of its subgroups. It represents only the views of the participants listed in the “Source(s)” field above. It is offered as a basis for discussion. It is not binding on the contributor(s), who reserve(s) the right to add, amend or withdraw material contained herein. Release: 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 802.16. Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and.http://standards.ieee.org/guides/bylaws/sect6-7.html#6http://standards.ieee.org/guides/opman/sect6.html#6.3 Further information is located at and.http://standards.ieee.org/board/pat/pat-material.htmlhttp://standards.ieee.org/board/pat

2. LBS Applications Some popular LBS applications –Emergency 911 safety services E.g. disaster rescue –Information services E.g. guided tours –Location based billing services E.g. discount announcement –Tracking and management services E.g. postal packages tracking

3. Estimation of MS Location To enable the above-mentioned LBS applications, the BS should acquire MS location and track it Three categories of location estimation techniques –Network-based scheme –Terminal-based scheme –Hybrid scheme

4. Estimation of MS Location (cont.) Network-based Location Estimation Scheme –Angle of arrival (AOA) –Time difference of arrival (TDOA) 1. BS utilizes the AOA measurement or MS performs the TDOA measurement and reports its location to the BS 2. BS will acquire MS location

5. Estimation of MS Location (cont.) Terminal-based Location Estimation Scheme –Time of arrival (TOA): GPS 1. MS obtains TOA measurement and reports its location to the BS 2. BS will acquire MS location

6. Estimation of MS Location (cont.) Hybrid Location Estimation Scheme –Combines both the network-based and terminal-based schemes 1. MS obtains TOA measurements and reports it to the BS 2. MS conducts the TDOA measurements and reports it to the BS 3. BS performs the AOA measurements 4. BS estimates and acquires MS location

7. Simulation results and comparison

8. Conclusion To enable the LBS applications, the BS should acquire MS location and track it Different categories of location estimation and tracking schemes should be considered under different environments Three main issues should be considered for supporting LBS –Location estimation method –Location parameters to be updated –Parameters updating method

9. Proposed Text [Insert the following text after line#3, page#23 in 802.16m-08/003r1 (P802.16m SDD)] 14 Support for Location Based Services 14.1 Mobile Station Location Estimation and Tracking 14.1.1 Terminal-based MS Location Estimation and Tracking 14.1.2 Network-based MS Location Estimation and Tracking 14.1.3 Hybrid MS Location Estimation and Tracking