1、 TIA-102.BAAC-C (Revision of TIA-102.BAAC-B) $SULO 2011Project 25 Common Air Interface Reserved Values ANSI/TIA-102.BAAC-C 2011 $PPROVED: $SULO, 2011 NOTICE TIA Engineering Standards and Publications are designed to serve the public interest through eliminating misunderstandings between manufacturer
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24、mittee progressed the original document through the TIA standards development process to its status as an ANSI and a Project 25 standard. This document describes the CAI Reserved Values that may be utilized by communications equipment conforming to the APCO Project 25 System and Standards Definition
25、, TSB102-A. The document has been subsequently modified by the members and associates of the TR-8.15 Subcommittee to specify additional reserved values supported by the Project 25 leadership. With these additions, this document supersedes TIA-102.BAAC-B. Additional Reserved Values may be added to th
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31、ii TABLE OF CONTENTS 1. SCOPE.1 1.1 CONVENTIONS .1 1.2 DEFAULT VALUES.1 1.3 REVISION HISTORY .1 1.4 NORMATIVE REFERENCES .2 1.5 INFORMATIVE REFERENCES 2 2. VALUES3 2.1 NETWORK ACCESS CODE .3 2.2 LINK CONTROL FORMAT3 2.3 MANUFACTURERS ID 3 2.4 SOURCE AND DESTINATION ID4 2.5 TALK GROUP ID.4 2.6 MESSAG
32、E INDICATOR .4 2.7 KEY ID4 2.8 ALGORITHM ID5 2.9 SERVICE ACCESS POINT .5 2.10 EMERGENCY INDICATOR6 2.11 DATA UNIT ID6 TIA-102.BAAC-C iv This page intentionally left blank.TIA-102.BAAC-C 1 1. Scope This document is a supplement to the Common Air Interface, reference 1, that lists all of the reserved
33、values for the fields of information. This is intended to be interpreted with the Common Air Interface and is not intended to be understood by itself. 1.1 Conventions The Common Air Interface defines the following fields with special reserved values. Name Abbrev. Size (bits) Network Access code NAC
34、12 Link Control Format LCF 8 Manufacturers ID MFID 8 Source ID 24 Destination ID 24 Talk Group ID TGID 16 Message Indicator MI 72 Key ID KID 16 Algorithm ID ALGID 8 Service Access Point SAP 6 Emergency Indicator E 1 Data Unit ID DUID 4 Some of these fields have values that are reserved for future st
35、andard definitions. There are also some values that are defined for standard operation in this document. Throughout this document the values that are inserted into the fields are represented as hexadecimal or binary numbers. This is done to make it convenient to compare the value in a machine repres
36、entation. The hexadecimal numbers are represented with a leading $ sign to signify the radix for the number. Binary numbers are represented with a leading % sign. For some values a familiar form is also given in decimal. The familiar form is used as a displayed value in some applications while the h
37、exadecimal representation is meant to represent the value within a computer process inside a radio. When a decimal representation is used it is given in the customary format, without a leading $ sign or % sign. 1.2 Default Values Many of the fields have default values defined for them. The purpose o
38、f a default value is to define a value that may be safely used in normal operation without explicit programming by the user of the radio equipment. Default values may be programmed at the time of manufacture and used until a particular value is assigned or programmed by the radio user. 1.3 Revision
39、History January 25, 1993, P25.930125.1.0, contained original values for voice. April 8, 1993, P25.930125.1.1, revised so that this is no longer an appendix to the Common Air Interface. July 12, 1993, P25.930125.1.2, revised to add SAP and ALGID values. TIA-102.BAAC-C 2 December 13, 1993, P25.930125.
40、1.3, revised to add more SAP values and 16-bit talk group IDs. June 2, 1994, final revision for publication. An MFID is assigned for Transcrypt. Version A, February 6, 1995, revised Algorithm IDs and SAP values. Also added definition of the Emergency bit. Version B, June 22, 1995, revised the MFID l
41、ist to include more manufacturers, published as revision A. Version 1.0, 21 May, 1999, revised to remove references to analog carrier squelch, and add new access code definitions. Version 1.1, 24 June, 1999, defines NAC codes $F7E and $F7F. Version 1.2, addendum 1, 31 January 2001, defines SNDCP SAP
42、 value. Version 2.0, 26 March 2003, defines Data Unit ID values. Version 2.1, 22 July 2003, corrections from letter ballot. Version 3.0, 18 August 2008, revised to specify SAP values for Location Services per TR8.15-08-04-0001 request for SAP 48 and Conventional Packet Data Registration/OTAR per edi
43、tors note in section 5.3.2, and to specify the 16-bit talk group ID to 24-bit conventional talk group ID mapping for Message Update and Status Update messages. Version 3.1, 24 February 2009, preparation for publication Version 3.2, 06 April 2009, added URL for informative reference 2 Version 4.0, 14
44、 September 2010, added algorithm ID for 128-bit AES Version 4.1, 25 October 2010, preparation for letter ballot Version 4.2, 20 December 2010, revised per ballot comments Version 4.3, 14 January 2011, revised per ballot comment resolution discussions Version 4.4, 14 February 2011, preparation for pu
45、blication 1.4 Normative References The following standards contain provisions that, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this st
46、andard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. ANSI and TIA maintain registers of currently valid national standards published by them. 1 Project 25 FDMA Common Air Interface, September 2003, TIA-102.BAAA-A. 1.5 Informative
47、 References 2 MFID Manufacturers Identifier Number Assignment Guide and Procedures, July 2008, see the TIA web page (www.tiaonline.org), TR-8.15 committee. 3 Project 25 Link Control Word Formats and Messages, July 2009, TIA 102.AABF-B. TIA-102.BAAC-C 3 2. Values 2.1 Network Access Code The default N
48、AC is $293. The value of $F7E is defined to allow a receiver to open upon receipt of any NAC. The value of $F7F is defined to allow a repeater to receive and retransmit any NAC. All of these values are tabulated below. Standard NAC Values NAC Explanation $293 DEFAULT $F7E Receiver to open on any NAC
49、 $F7F Repeater to receive and retransmit any NAC This document advises implementations not to transmit the NAC values $F7E or $F7F. These values are intended for use in receivers. 2.2 Link Control Format The LCF shown in the Common Air Interface document, reference 1, uses four values tabulated below. Other values are also defined for this field in the Link Control Word Formats document, reference 3. Standard LCF Values LCF Meaning $00 Defines the format for Group Calls. The LC contains an Emergency bit, TGID, and a Sour
