SOURCE: Du Yunqi ABSTRACT: This contribution provides some information of Galileo system to clarify some questions based on the contribution C (C.S0022-B Backward Compatibility Changes) at last meeting. TITLE: Galileo System Information inputs TSG-C RECOMMENDATION: FYI RITT grants a free, irrevocable license to 3GPP2 and its Organizational Partners to incorporate text or other copyrightable material contained in the contribution and any modifications thereof in the creation of 3GPP2 publications; to copyright and sell in Organizational Partner's name any Organizational Partner's standards publication even though it may include all or portions of this contribution; and at the Organizational Partner's sole discretion to permit others to reproduce in whole or in part such contribution or the resulting Organizational Partner's standards publication. RITT are also willing to grant licenses under such contributor copyrights to third parties on reasonable, non- discriminatory terms and conditions for purpose of practicing an Organizational Partner’s standard which incorporates this contribution. This document has been prepared by RITT to assist the development of specifications by 3GPP2. It is proposed to the Committee as a basis for discussion and is not to be construed as a binding proposal on RITT. RITT specifically reserves the right to amend or modify the material contained herein and to any intellectual property of RITT other than provided in the copyright statement above. C RITT

RITT 2 Outline  Development Status of Galileo System  Galileo ICD Specification  Feasibility Study of Galileo in LBS  RITT Work Plan

RITT 3 Development Status of Galileo System  Galileo system is the European satellite navigation system. The Galileo Space Segment will comprise a constellation of a total of 30 Medium Earth Orbit (MEO) satellites, of which 3 are spares. So far only one test satellite is in orbit.  It’s estimated that the full operational capability of Galileo system might be achieved in  The EU and US have officially announced that new GPS and Galileo satellites will jointly employ an improved design for their civil navigation signals, ensuring their interoperability. The resulting GPS L1C signal and Galileo L1F signal have been optimized to use a multiplexed binary offset carrier (MBOC) waveform. Future receivers using the MBOC signal should be able to track the GPS and/or Galileo signals with higher accuracy in challenging environments that include multipath, noise, and interference.  For more information about the development statues of Galileo system, please refer to the following web site:

RITT 4 Galileo ICD specification  The Galileo Open Service Interface Control Document (ICD specification) is the basis of all the modifications made in C.S0022-B.  This specification （ Galileo OS Signal in Space ICD (OS SIS ICD), Draft 0, Galileo Joint Undertaking, May 23rd, ） is fully available on the following Galileo Joint Undertaking web Site:  Within the section OS SIS ICD, it can be downloaded for free.  For any question or remarks please contact: Du Yunqi, RITT Michel Monnerat,Alcatel Tel: Tel: +33 (0)

RITT 5 Feasibility Study of Galileo in LBS  Feasibility study for Galileo in LBS have been done in 3GPP. For detail analyses, please refer to 3GPP v1.0.0 “Study into Applicability of GALILEO in LCS”. Note: The Galileo standardization work in 3GPP have been started since So far the stage 3 spec RRLP(Rel-7) in GERAN( equal to the C.S0022 in 3GPP2) have been finished to support Galileo positioning method. The stage 3 spec RLC (Rel-7) in RAN will also be finished soon.  The highlight of this technical report is the performance analyses of Galileo system on LBS based on some simulations hypotheses and results.  It is concluded from the technical report that the use of GALILEO either alone or in association with GPS greatly improves the availability and the accuracy of the LBS Services in difficult situations such as urban or indoors environments where a limited number of satellites are visible and signal can be greatly attenuated.

RITT 6 RITT Work Plan  There are two significant problems to be solved with the addition of Galileo positioning method into C.S0022-B a.Backward Compatibility of C.S0022-B b.Definitions of Request and Response Element for Galileo  RITT will bring in new contributions focused on the second problem listed above in the following meetings.  RITT would, however, like to encourage participants to bring in questions and issues related to Galileo positioning for discussion to help move the work item forward.

RITT 7 References [1] Galileo OS Signal in Space ICD (OS SIS ICD), Draft 0, Galileo Joint Undertaking, May 23rd, [2] 3GPP v1.0.0, “Study into Applicability of GALILEO in LCS”, Jun 2003