1. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 1 Joint TGu-802.21: Location Configuration for Emergency Services Notice: This document has been prepared to assist IEEE 802.11. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) 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 802.11. Patent Policy and Procedures: The contributor is familiar with the IEEE 802 Patent Policy and Procedures, including the statement "IEEE standards may include the known use of patent(s), including patent applications, provided the IEEE receives assurance from the patent holder or applicant with respect to patents essential for compliance with both mandatory and optional portions of the standard." Early disclosure to the Working Group of patent information that might be relevant to the standard is essential to reduce the possibility for delays in the development process and increase the likelihood that the draft publication will be approved for publication. Please notify the Chair as early as possible, in written or electronic form, if patented technology (or technology under patent application) might be incorporated into a draft standard being developed within the IEEE 802.11 Working Group. If you have questions, contact the IEEE Patent Committee Administrator at.http:// ieee802.org/guides/bylaws/sb-bylaws.pdfstuart.kerry@philips.compatcom@ieee.org Date: 2007-03-13 Authors:

2. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 2 Abstract This presentation gives an overview of the components of an Emergency Service and addresses an information framework to provide location configuration protocol capabilities to the requesting nodes

3. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 3 Emergency Services - background Enhanced 911 (E911) was defined to be a system that automatically associates a physical address with the calling party's telephone number Wireless E911 allows the mobile phone to be located geographically using radiolocation (relative loc), or alternatively it mandated the mobile phone to determine its own location with GPS (absolute loc) Nowadays not only a mobile phone, but any device capable of networking and having a VoIP application might be able to place an Emergency Call, and the access network providing IP access to the device might be mandated to support such a call

4. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 4 (Location related) Procedures required for placing an Emergency Call Placement of an Emergency Call is a complex procedure for the device, it involves: –Location Configuration Protocol (LCP) selection –Location determination ( in cellular networks, this might be done by the network on behalf of the mobile phone) –Location representation (geo, civic) –Mapping database discovery –Location to Service Translation (LoST) –Location conveyance –Placing Emergency calls IETF is defining the pieces of this puzzle Other SDOs defined different LCPs

5. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 5 Location Determination for Emergency Service purposes Currently, in PSTN and Cellular Networks, before the call is delivered to the PSAP, it must have location information included Location can be: –determined by the network (using radiolocation techniques, like TDoA) and provided to the psap (and not to the device) –determined by the device itself (e.g. GPS) and provided to psap –determined by the network and provided to the device upon request (before the Emergency Call is made) –Configured in the network and downloaded by the device (before the Emergency Call is made) Networks may support multiple protocols to determine, help in determining or provide the location to the device

6. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 6 Location Configuration Protocols (LCP) Protocols which determine or provide the location of the device to the device are called Location Configuration Protocols There are many standardized LCPs currently available Some of them are link layer specific, others are link layer agnostic Example of (network based) LCPs: –Link layer specific ones: LLDP[-MED], U-TDoA, D-TDoA –Link layer agnostic ones: DHCP, OMA SUPL, RELO, HELD (HTTP based) (Access) network operators may implement none, one or many LCPs Devices will need to implement at least one, preferably many LCPs

7. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 7 Location Location Information is needed for placing an Emergency Call Location Information may be needed in other cases too The accuracy the location is determined may be relevant for some services This presentation only addresses Location from Emergency Services point of view

8. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 8 Proposal It is proposed that 802.21 defines a new Information Element, called e.g. LCP Information Element, and that would list all the LCPs a given network supports a device would query the network to find out about the supported LCPs which helps in –Run the supported LCP to determine location quickly –Network selection depending on the client need and support for LCP for location –Flexibility for clients to choose any of supported LCP in network –Cuts down on location discovery mechanisms in serving network The IE could also contain the accuracy that specific network is providing the location of the device (per LCP) LCP request is envisioned to be used in same scenarios as the MIH IS –Obtaining serving link location protocol capabilities –Using serving link to obtain about target links –Queries in pre-association states in 802.11 and 802.16

9. doc.: IEEE 802.11-07/0xxxr0 Submission March, 2007 Gabor/SriniSlide 9 Simple State-1 Query: For emergency use STAAP 802.21 IS Get Information Req (Request for LCP) State-1 Query Mechanisms Get Information Resp (LCP IE ) Determine local LCP support Associate/Authenticate Determine Location Information (may be after IP addressing info) Place an Emergency Call