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22、OREWORD(This foreword in not part of this bulletin.) This document has been published by the Telecommunications Industry Association (TIA) in accordance with the terms and conditions provided for in a Memorandum of Understanding (MoU) executed by and between the TIA, the Associated Public-Safety Com
23、munications Officials (APCO), the National Association of State Telecommunications Directors (NASTD), and the various agencies of the Federal government (FED). This document was originally developed by the APCO Project 25 Interface Committee (APIC) Data Task Group, and TIA Industry members. Members
24、of the TIA TR-8.5 Signaling and Data Transmission Subcommittee progressed the original document through the TIA standards development process to its status as a Project 25 systems bulletin. This document defines an overview of Location Services in a P25 system. This revision supersedes TSB-102.BAJA.
25、 The TIA makes no claims as to the applicability of the information contained in this document for any purpose although it is believed that the information will prove to be invaluable to designers of Project 25 compliant equipment. Some aspects of the specifications contained in this document may no
26、t have been fully operationally tested; however, a great deal of time and good faith effort has been invested in the preparation of this document to ensure the accuracy of the information it contains. TSB-102.BAJA-A ii Patent Identification The readers attention is called to the possibility that com
27、pliance with this document may require the use of one or more inventions covered by patent rights. By publication of this document no position is taken with respect to the validity of those claims or any patent rights in connection therewith. The patent holders so far identified have, we believe, fi
28、led statements of willingness to grant licenses under those rights on reasonable and nondiscriminatory terms and conditions to applicants desiring to obtain such licenses. The following patent holders and patents have been identified in accordance with the TIA intellectual property rights policy: No
29、 patents have been identified.TIA shall not be responsible for identifying patents for which licenses may be required by this document or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. TSB-102.BAJA-A iii Table Of Contents1 Introduction 1
30、1.1 Scope. 21.2 References. 21.3 Definitions 31.4 Abbreviations . 42 Location Services Summary 62.1 P25 Tier 1 Location Service. 62.2 P25 Tier 2 Location Service. 63 P25 Location Service Document Suite. 74 Location Services System Architecture 74.1 Architectural Entities 74.1.1 Location Information
31、System. 84.1.2 Location Service Host System 84.1.3 Fixed Data Host 94.1.4 Mobile Data Peripheral 94.1.5 P25 System. 94.1.5.1 SU 104.1.5.1.1 Obtaining Location Information. 104.1.5.1.2 Triggering conditions 104.1.5.1.2.1 Supported Triggering Conditions 114.1.5.1.2.2 Unsupported Triggering Conditions
32、114.1.5.1.2.3 Request/Response protocol . 124.1.5.1.3 Transmitting Location Information 124.1.5.1.3.1 Transmit Modes 124.1.5.1.3.2 Air Interface Format 124.1.5.1.3.3 Channel Usage. 124.1.5.1.3.4 Reporting Conditions 134.1.5.1.4 Providing Location Information . 134.1.5.2 Fixed Station 134.1.5.3 RFSS
33、. 134.2 Architectures 154.2.1 Conventional SU direct to SU . 154.2.2 Conventional SU repeated to SU 164.2.3 Conventional or Trunked SU to Fixed Data Host 164.2.4 MDP used for location services. 184.3 Interfaces . 184.3.1 Location Information System to SU or MDP 184.3.2 SU to SU, SU to Fixed Station,
34、 and SU to RFSS 194.3.2.1 Dedicated SAP. 204.3.2.2 SCEP Protocol . 204.3.2.3 SNDCP Protocol 204.3.3 SU to Location Service Host System 204.3.4 SU to MDP 214.3.5 RFSS to Fixed Data Host 21TSB-102.BAJA-A iv 4.3.6 Fixed Data Host or MDP to Location Service Host System.214.3.7 ISSI .214.4 Location Servi
35、ce Protocol Stacks.224.4.1 Simple Direct Mode .224.4.2 Simple Repeated Mode.224.4.3 IP Direct Mode.224.4.4 IP Direct Mode with MDP 234.4.5 IP Repeated Mode 234.4.6 IP Repeated Mode with MDP 244.4.7 IP Fixed Host Mode.244.4.8 IP Fixed Host Mode with MDP.244.4.9 SNDCP Fixed Host Mode254.4.10 SNDCP Fix
36、ed Host Mode with MDP .254.4.11 SNDCP Fixed Host Mode Over ISSI .254.5 Protocol Layers 264.5.1 Um (SAP 0x30) .264.5.2 SCEP.264.5.3 SNDCP264.5.4 Ed264.5.5 A264.5.6 G .264.5.7 IP.274.5.8 UDP.274.5.9 NMEA 0183.274.5.10 LRRP.27TSB-102.BAJA-A v List of TablesTable 1 - Architectural Options 19TSB-102.BAJA
37、-A vi List of FiguresFigure 1 - Architectural Entities 8Figure 2 - Direct Mode15Figure 3 - Repeated Mode .16Figure 4 - Fixed Host Mode16Figure 5 - SU-to-SU Fixed Network Routing 17Figure 6 - Roaming SU ISSI Routing17Figure 7 - LIS to MDP.18Figure 8 - MDP to LSHS.18Figure 9 - Dedicated SAP Direct Mod
38、e 22Figure 10 - Dedicated SAP Repeated Mode 22Figure 11 - Packet Data Direct Mode .22Figure 12 - Packet Data Direct Mode with MDP.23Figure 13 - Packet Data Repeated Mode.23Figure 14 - Packet Data Repeated Mode with MDP.24Figure 15 - Packet Data Fixed Host Mode .24Figure 16 - Packet Data Fixed Host M
39、ode with MDP .24Figure 17 - SNDCP Fixed Host Mode 25Figure 18 - SNDCP Fixed Host Mode with MDP 25Figure 19 - SNDCP Fixed Host Mode Over ISSI25TSB-102.BAJA-A vii Document Revision HistoryVersion Date DescriptionIssue O First TIA release. 28-Jul-08 Initial version derived from TR-8.5_2008_0005 Locatio
40、n Services Architecture Issue E document. rev. 1 16-Sep-08 Editorial corrections to references 8 and 9, removed normative language, added odd/even page heading, revised odd/even page layout for two-sided printingrev. 2 30-Sep-08 Incorporated project number assigned by TIA rev. 3 03-Dec-08 Revised pe
41、r PN-3-0348 Ballot Comment Resolution Matrix, TR-8.5_2008_0075 rev. 4 17-Feb-09 Final preparation for publication Issue A Second TIA release. 25-Sep-09 Updates to reference EXI for Tier 2 Location compression.rev.1 15-Feb-10 Final preparation for publication TSB-102.BAJA-A viii This Page Intentional
42、ly Left BankTSB-102.BAJA-A 1 1 Introduction The Project 25 Location Service Overview describes how TIA-102 series standards and other industry standards are used to provide a location reporting service for P25 radio systemsThis document was originally created by the TIA Project 25 Interface Committe
43、e (APIC) Data Task Group (DTG) for the purpose of describing the Location Services Architecture. It was edited in the TIA TR8.5 Data Sub-committee to transform it into an overview document for P25 Location Services. Knowing the location of the SU (Subscriber Unit) and, by implication the user, could
44、 be extremely important, especially in situations where the user might be in harms way or lost. Some illustrative examples are: Resource Tracking x Monitor locations and movements of the user community. x Automatic Reporting on the users P25 voice channel. Transmit location on a timed programmable i
45、nterval. Transmit location on each PTT. Emergency Mode Reporting x Activated when Emergency mode is entered, typically by pressing an “Emergency” button. x Set to automatically transmit on emergency PTT. x Repeats whenever the emergency message is sent. No manual PTT required.Perimeter and Target (W
46、aypoint) Mapping x Walk desired perimeter to map its location. Set to transmit automatically on a short interval (e.g., 3 seconds). Set unit identifier to perimeter name. x Mark designated targets. Set to transmit automatically on PTT. Set unit identifier to target name. Transmit (could also have so
47、meone at base monitoring). x Same technique used for Search and Rescue Missions and Grid Searches The specifications in the P25 Location Services document suite will provide a means for subscriber units and infrastructure elements from various manufacturers to interoperate when providing location se
48、rvices. TSB-102.BAJA-A 2 1.1 Scope This document describes P25 Location Services including a brief summary of the solution (Section 2), document suite (Section 3), and its architecture (Section 2.22).The document describes a two-tiered approach to providing location services. See section 2 for a sum
49、mary of the two tiers. The functional scope of the location service as described herein covers functionality described in TIA-102 11 section 2.3.3.4. Note that group-oriented Location Services are not supported at this time. The transport mechanisms for group data have not been completed, so there is no mechanism to send group-addressed application data. The protocols described in the P25 Location Service documentation suite have to be able to expand to allow group-oriented operation when the transport mechanisms are available. Note also
