1. Location Inter-operability Forum Mobile Location Protocol (MLP)
Reporter : Allen

2. Outline Introduction MLP Overview MLP Structure
MLP Basic services & Message Flow
Thesis Modification Plan

3. Introduction I
MLP is an application-level protocol for getting the position of mobile stations (mobile phones, wireless personal digital assistants, etc.)
Define a simple and secure access method that allow Internet applications to query location information from a wireless network
Irrespective of its underlying air interface technologies and positioning methods
This specification has been prepared by LIF to provide a simple and secure API to the location server
綜觀EDGE 的空中介面（air interface）: 所謂的EDGE 空中介面，意指透 過現有的 GSM 系統，提供更高的資料傳輸率
API (Application Programmer Interface)

4. Introduction II
MLP serves as the interface between a Location Server and a Location Services (LCS) Client
The API is based on existing and well-known Internet technologies as HTTP, SSL/TLS and XML
Motorola, Nokia, Ericsson contribution to LIF
23-Jan-2001 ： Version 1.0
06-Jun-2002 ：Final change 3.0.0
ANSI American National Standards Institute
DTD Document Type Definition
GMLC Gateway Mobile Location Center
GMT Greenwich Mean Time
HTTP Hypertext Transfer Protocol
HTTPS HTTP Secure
LCS Location Services
MLC Mobile Location Center
MLP Mobile Location Protocol
MPC Mobile Positioning Center
MS Mobile Station
MSID Mobile Station Identifier
SSL Secure Socket Layer
TLS Transport Layer Security
URI Uniform Resource Identifier
URL Uniform Resource Locator
UTM Universal Transverse Mercator
WGS World Geodetic System
XML Extensible Markup Language

5. MLP Overview
MLP serves as the interface between a Location Server and a Location Services (LCS) Client

6. MLP Structure 3GPP WSP (Wireless Session Protocol)
On the lowest level, the transport protocol defines how XML content is transported.
The Element Layer defines all common elements used by the services in the service layer.
The Service Layer defines the actual services offered by the MLP framework.
Basic MLP Services are based on location services defined by 3GPP, and are defined by this specification.
"Advanced MLP Services" and "Other MLP Services" are additional services that either will be specified in other specifications or are specified by other fora that conform to the MLP framework.

7. MLP Basic services & Message Flow
Standard Location Immediate Service
Emergency Location Immediate Service
Standard Location Reporting Service
Emergency Location Reporting Service
Triggered Location Reporting Service

8. Standard Location Immediate Service
This service is used when a (single) location response is required immediately (within a set time) or the request may be served by several asynchronous location responses (until a predefined timeout limit is reached)
This service consists of the following messages:
Standard Location Immediate Request
Standard Location Immediate Answer
Standard Location Immediate Report

9. SLIS Message Flow LCS Client Location Server If needed
Standard Location Immediate Request
Standard Location Immediate Answer
Standard Location Immediate Report
If needed

10. Emergency Location Immediate Service
This is a service used especially for querying of the location of a mobile subscriber that has initiated an emergency call
The response to this service is required immediately (within a set time).
This service consists of the following messages:
Emergency Location Immediate Request
Emergency Location Immediate Answer

11. ELIS Message Flow LCS Client Location Server
Emergency Location Immediate Request
Emergency Location Immediate Answer

12. Standard Location Reporting Service
This is a service that is used when a mobile subscriber wants an LCS Client to receive the MS location.
Which application and its address are specified by MS or defined in the location server
This service consists of the following message:
Standard Location Report
這是當行動用戶想要LCS Client接收到這個手機位置時所使用的服務。

13. SLRS Message Flow
LCS Client
Location Server
Standard Location Report

14. Emergency Location Reporting Service
This is a service that is used when the wireless network automatically initiates the positioning at an emergency call.
The position and related data is then sent to the emergency application from the location server
Which application and its address are defined in the location server.
This service consists of the following message:
Emergency Location Report

15. ELRS Message Flow
LCS Client
Location Server
Emergency Location Report

16. Triggered Location Reporting Service
This is a service used when the mobile subscriber’s location should be reported at a specific time interval or on the occurrence of a specific event.
This service consists of the following messages:
Triggered Location Reporting Request
Triggered Location Reporting Answer
Triggered Location Report
Triggered Location Reporting Stop Request
Triggered Location Reporting Stop Answer

17. TLRS Message Flow LCS Client Location Server
Triggered Location Reporting Request
Triggered Location Reporting Answer
Triggered Location Report
Triggered Location Reporting Stop Request
Triggered Location Reporting Stop Answer

18. CPL-SL Protocol Stack on Thesis
TCP/UDP/SCTP
SSL/TLS
CPL Security Low Layer
SIP
Service
VoIP
Location
GPS/MLP
Presence
Content
CPL Security Up Layer
Connection flows
HTTP/SOAP
MLP

19. CPL-SL Plus MLP Request (MLP) Location Server GMLC/MPC Response (MLP)
Possible realizations of a Location Server are
ð the GMLC, which is the location server defined in GSM
and UMTS, and
ð the MPC, which is defined in ANSI standards.
ð Since the location server should be seen as a logical
entity, other implementations are possible.
GMLC – Gateway Mobile Location Center
MPC – Mobile Location Center
Response (MLP)

20. Global Positioning Systems (GPS)
Total satellites : 24
Total tracks : 3
Data
Data
原理就是三角測量原理，也就是說必須至少接收到三顆不同方位的衛星資料
Data
(經緯度及二度分帶方格座標 )