1、 TIA-102.BACE-2008 APPROVED: JUNE 12, 2008 REAFFIRMED: JANUARY 29, 2013 TIA-102.BACE June 2008Project 25 Inter RF Subsystem Interface (ISSI) Messagesand Procedures for Conventional Operation NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminati
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6、. (From Project No. 3-0287-1-RF1, formulated under the cognizance of the TIA TR-8 Mobile and Personal Private Radio Standards, TR-8.19 Subcommittee on Wireline System Interfaces). Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Department 1320 N. Courthouse Road Arlingt
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24、his document has been developed by TR8.19 (Wireline Interfaces) with inputs from the APCO Project 25 Interface Committee (APIC), the APIC Fixed Station Interface Task Group, and TIA Industry members. This document is being published to provide technical information on the emerging digital techniques
25、 for Land Mobile Radio Service. This document defines the messages and procedures to support conventional fixed stations, conventional SUs and conventional consoles on the Project 25 Inter-RF Subsystem Interface (ISSI). The ISSI is the interface between Radio Frequency Subsystems (RFSSs) enabling re
26、levant Project 25 user requirements to be satisfied (e.g., as described in the Inter-RF Subsystem Interface Overview (TSB-102.BACC-A). Future related standardization efforts are planned to develop new TIA standards defining protocols for an ISSI supporting Project 25-defined data services. In additi
27、on, future associated standardization efforts are planned to develop new TIA standards defining compliance tests (e.g., measurement methods, performance recommendations, and interoperability tests) applicable to equipment implementing the Project 25 ISSI protocols defined in this and future related
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31、or scope of those patents that are brought to its attention. Trademark Identification The following trademarks are referenced in this specification: IMBE is a trademark of Digital Voice Systems, Inc.11Use of the trademark identified in this standard is not an endorsement by TIA. TIA-102.BACE v Table
32、 of Contents 1 Introduction. 1 1.1 Scope 1 1.2 Document Structure 2 1.3 Definitions . 2 1.4 Abbreviations 4 1.5 References 5 1.5.1 Normative References . 5 1.5.2 Informative References 5 2 Overview of Architecture and Protocol Suite 6 2.1 Architecture Overview. 6 2.1.1 Call Models. 7 2.1.2 Subsystem
33、 Topologies. 8 2.1.3 Functional Model 15 2.1.4 Service Access Point Model. 22 2.2 Conventional ISSI Internet Protocol Suite. 34 2.2.1 Complexity 1. 34 2.2.2 Complexity 2. 39 2.3 Conventional ISSI Data Transmission Order 39 3 Application Protocols Complexity 1. 40 3.1 RTP Payload Definitions . 40 3.1
34、.1 P25 Payload Header 40 3.1.2 P25 Blocks . 42 3.2 Construction of RTP Packets for Ec . 72 3.2.1 Call Control. 73 3.2.2 Transmission Control Packets . 74 4 Call Control. 77 4.1 CC-SAP. 77 4.1.1 Status . 80 4.1.2 SRC Socket 81 4.1.3 DEST Socket 81 4.2 State Models for Call Control Services . 81 4.2.1
35、 Console Connection Establishment State Model. 83 4.2.2 CAR Connection Establishment State Model 87 4.2.3 Console Station Control State Model. 90 4.2.4 CAR Station Control State Model. 93 4.2.5 Console Single Block Control State Model 96 4.2.6 CAR Single Block Control State Model 99 4.2.7 Console Vo
36、ter Control State Model 101 4.2.8 CAR Voter Control State Model . 103 4.3 Control Services Procedures 104 4.3.1 General Protocol Procedures. 104 4.3.2 Establishing and Disconnecting the Connection 105 4.3.3 Connectivity Maintenance Procedures. 109 4.3.4 Console Station Control Command Request . 110
37、4.3.5 Console Request for Station Control Update. 111 4.3.6 Console Request to Send an SBC Message. 112 4.3.7 CAR Report of the Reception of an SBC Message . 113 4.3.8 Console Request to Change a Voter Setting (Voter Command) . 114 4.3.9 CAR Report of Voter Status . 114 5 Transmission Control . 116
38、5.1 TC-SAP . 116 5.1.1 Spurt Type 119 5.1.2 Spurt Request Decision . 119 5.1.3 Mute Action 120 TIA-102.BACE vi 5.1.4 Losing State . 120 5.2 Transmission Control State Model 121 5.2.1 Console Transmission State Model . 124 5.2.2 CAR Transmission State Model. 128 5.2.3 Console Receive State Model 132
39、5.2.4 CAR Receive State Model . 138 5.3 TC Packets and the Voice Conveyance and Control Services. 143 5.4 Management of RTP Header Fields . 144 5.5 Management of Transmission Sequence Numbers 145 5.6 Losing Audio . 146 5.7 Transmission Control Procedures. 147 5.7.1 Console Subsystem Transmission on
40、a Fixed Station. 147 5.7.2 SU Transmission Received by a Fixed Station 151 5.7.3 Console Subsystem Reception of Another Console Subsystems Audio 154 5.7.4 Console Subsystem Request to Mute (and Unmute) an Audio Stream. 155 5.8 Miscellaneous Processing Rules for RTP Packets. 156 Annex A (Normative) T
41、imer Values and Constants 158 Annex B (Informative) Connection Call Flows. 159 B.1 Console Subsystem Connection Setup 159 Annex C (Informative) Station Control Call Flows 161 C.1 Console Subsystem Station Control Request with Parallel Console Subsystem. 161 C.2 Console Subsystem Station Control Repo
42、rt Request. 162 Annex D (Informative) Single Block Control Call Flows. 163 D.1 Console Subsystem SBC Request . 163 D.2 SU Sourced SBC 163 Annex E (Informative) Voter Control. 165 E.1 Console Subsystem Voter Command Request 165 Annex F (Informative) Transmission Control Call Flows 167 F.1 Console Sub
43、system Voice Transmission with Parallel Console Subsystem 167 F.2 SU Transmission Received by the CARs Fixed Station 168 F.3 Console Takeover of a Lower Priority Console Transmission 169 TIA-102.BACE vii List of Figures FIGURE 1 - ARCHITECTURAL LOCATIONS OF THE CONVENTIONAL ARBITRATOR.6 FIGURE 2 - E
44、C AND EF FOR CONVENTIONAL COMPLEXITY 1 7 FIGURE 3 - TYPICAL COMPLEXITY 1 GROUP CALL AND UNIT TO UNIT CALL INTERCONNECTION MODEL9 FIGURE 4 - COMPLEXITY 1 STATION CONTROL INTERCONNECTIONS 10 FIGURE 5 - COMPLEXITY 1 SINGLE BLOCK CONTROL INTERCONNECTIONS .11 FIGURE 6 - GENERAL COMPLEXITY LEVEL 1 ISSI CA
45、LL MODEL .12 FIGURE 7 - TYPICAL COMPLEXITY 2 GROUP CALL INTERCONNECTION MODEL 14 FIGURE 8 - TYPICAL COMPLEXITY 2 UNIT-TO-UNIT CALL INTERCONNECTION MODEL 15 FIGURE 9 - ISSI FUNCTIONAL ENTITIES CONVENTIONAL COMPLEXITY 1 CONSOLE TO CAR .16 FIGURE 10 CONV EC IP CONNECTIONS MAPPED TO A FIXED STATION 17 F
46、IGURE 11 CONVENTIONAL CALL TRANSMISSION CONTROL .21 FIGURE 12 SERVICE ACCESS POINT MODEL22 FIGURE 13 SAP TRANSACTIONS.23 FIGURE 14 CC SAP/MESSAGE MODEL .25 FIGURE 15 - TC SAP/MESSAGE MODEL 31 FIGURE 16 - COMPLEXITY 1 INTERNET PROTOCOL SUITE 34 FIGURE 17 - TYPICAL IPV4 DATAGRAM HEADER FORMAT .35 FIGU
47、RE 18 - USER DATAGRAM HEADER FORMAT36 FIGURE 19 EC RTP PACKET STRUCTURE .38 FIGURE 20 - CONTROL OCTET FORMAT .40 FIGURE 21 - BLOCK HEADER .40 FIGURE 22 EC RTP BLOCK TYPES41 FIGURE 23 - COMMON FIELDS FOR CAI BLOCKS.42 FIGURE 24 FORMAT FOR IMBE FRAMES 1, 2, 10, AND 11.45 FIGURE 25 FORMAT FOR IMBE FRAM
48、ES 3, 4, 5, 6, 7 AND 8 46 FIGURE 26 FORMAT FOR IMBE FRAMES 9 AND 18.47 FIGURE 27 FORMAT FOR IMBE FRAMES 12, 13, 14, 15, 16 AND 1748 FIGURE 28 - BLOCK HEADER .49 FIGURE 29 CONVENTIONAL HEADER WORD.51 FIGURE 30 IMBE VOICE HEADER PART 1 52 FIGURE 31 IMBE VOICE HEADER PART 2 53 FIGURE 32 - PCM AUDIO 54
49、FIGURE 33 CONV RF PTT CONTROL WORD54 FIGURE 34 CONV CONSOLE PTT CONTROL WORD55 FIGURE 35 CONV CONSOLE CONTROL WORD .57 FIGURE 36 CONVENTIONAL LINK CONTROL WORD.58 FIGURE 37 STATION SETTINGS FOR CONSOLE TX .59 FIGURE 38 STATION CONTROL COMMAND.60 FIGURE 39 CHANNEL SELECTION61 FIGURE 40 REPEAT MODE61 FIGURE 41 SQUELCH CONTROL 62 FIGURE 42 SECOND RECEIVER .62 FIGURE 43 SQUELCH CODE63 FIGURE 44 PROTECTED MODE63 FIGURE 45 WILDCARD 1 OR 2 .63 FIGURE 46 RECEIVER SQUELCH .64 FIGURE 47 RF MODE CONTROL64 FIGURE 48 SPECIAL FUNCTI
