Location Estimation and Tracking System for Mobile Devices in Project 802.16m SDD Document Number: S802.16m-07/202 Date Submitted: November 12, 2007 Source:

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Location Estimation and Tracking System for Mobile Devices in Project m SDD Document Number: S802.16m-07/202 Date Submitted: November 12, 2007 Source: Chung-Hsien Hsu Kai-Ten Feng Yuan-Pin Lin, Chun-Fang Fan-Shuo Tseng, Chieh-Yuan Ho, Yu-Ted Su, Wen-Rong Wu NCTU/MediaTek Inc., 1001 Ta Hsueh Road, Hsinchu, Taiwan 300, ROC I-Kang Fu Pei-Kai Liao and Paul Cheng MediaTek Inc. No. 1 Dusing Rd. 1 Hsinchu Science Park Hsinchu City 300 Taiwan. Venue: Atlanta, GA Base Contribution: IEEE C802.16m-07/202 Purpose: Propose TGm SDD to have a section “Mobile Station Location Estimation and Tracking”. Notice: This document does not represent the agreed views of the IEEE 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 Patent Policy: The contributor is familiar with the IEEE-SA Patent Policy and Procedures: and. Further information is located at and. S802.16m-07/202

2 Introduction Motivation –Different types of location-based services (LBSs) have been proposed and studied The emergency 911 (E-911) subscriber safety services –Due to the emergent interests in LBSs, it is required to provide enhanced precision in the location estimation of mobile device under different environments. The performance of the GPS based and network-assisted MS location systems vary under different environments. –In section 6.8 of m SRD, “IEEE m shall provide support for high resolution location determination” Purpose –Introduce a hybrid MS location estimation and tracking structure to achieve better accuracy for location estimation and to support location- based services. An simple example is given in the following –Propose to enable this functionality in IEEE m system

3 System Model Hybrid MS location estimation and tracking structure –GPS: TOA –BS to MS (Downlink): TDOA –MS to BS (Uplink): AOA

4 Performance Comparisons Performance comparisons between the GPS, the cellular, and the hybrid system in urban (top), suburban (middle), and rural (bottom) areas

55 Proposed Text for the ToC of TGm SDD x.y Mobile Station Location Estimation and Tracking [Although the GPS technology is widely used in position, not all of the MSs will be equipped with it. In order to support this functionality in IEEE m system, therefore, three location estimation and tracking schemes are proposed to provide location-based service.] x.y.1 GPS based MS Location Estimation and Tracking x.y.2 Network-assisted MS Location Estimation and Tracking x.y.3 Hybrid MS Location Estimation and Tracking [It has been known that the performance of the GPS based and network- assisted MS location systems vary under different environments. As a result, a hybrid location scheme, which combining the outcomes from both the network- based and the satellite-based techniques, is proposed to adaptation to various scenarios for location estimation.