TIA-102 CACA-1-2008 Project 25 Inter-RF Subsystem Interface Measurements Methods for Voice Services-Addendum 1 Trunked Console ISSI (Addendum to TIA-102 CACA)《项目25 语音服务内部射频(RF)子系统接.pdf

1、 TIA-102.CACA-1-2008 APPROVED: DECEMBER 10, 2008 REAFFIRMED: JANUARY 29, 2013 TIA-102.CACA-1 (Addendum to TIA-102.CACA) December 2008Project 25 Inter-RF Subsystem Interface Measurements Methods for Voice Services-Addendum 1 Trunked Console ISSI NOTICE TIA Engineering Standards and Publications are d

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22、E FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. TIA-102.CACA-1 iFOREWORD (This foreword is not part of this TIA standard.) This document has been published by the Telecommunications

23、 Industry Association (TIA) in accordance with the terms and conditions provided for in a Memorandum of Understanding executed by and between the TIA, the Association of Public Safety Communications Officials (APCO), the National Association of State Telecommunications Directors, and the various age

24、ncies of the Federal government. 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 Inter-Radio Frequency Subsystem Interface (ISSI) compliant equipment

25、. Some aspects of the specifications contained in this document may not 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. This document defines measure

26、ment methods recommended for assessing the performance of wide area voice services provided by Project 25 (P25) Radio Frequency Subsystems (RFSSs) interconnected with P25-standardized ISSI functional services and protocols defined by TIA-102.BACA (Inter-RF Subsystem Interface Messages Definition for

27、 Voice Services). The ISSI voice service (IVS) measurement methods are composed of performance parameter definitions and associated measurement procedures. In addition, nine informative (i.e., non-normative) annexes discuss supplemental topics. Development of a related new TIA standard is planned th

28、at will specify recommended IVS performance specifications for selected IVS performance parameters defined in this document. Future work is planned to define measurement methods (i.e., parameters and associated measurement procedures) recommended for assessing the performance of P25-standardized wid

29、e area functional services and protocols involving the ISSI in the following areas: enhancement to the initial set of ISSI measurement methods defined in this document, console interactions across the ISSI, ISSI support for supplementary data services (e.g., call alert); ISSI support for data servic

30、es; ISSI support for network management of subscriber units and network elements, which is not considered part of the ISSI; ISSI support of telephone interconnect (including emergency services) by roamers back over their ISSI interconnected Home P25 system; ISSI support for emergency multimedia serv

31、ices; ISSI-related traffic engineering, traffic control, resource reservation, and service level agreements; and, interconnection of ISSI lower layers in an interoperable manner. TIA-102.CACA-1 iiPatent Identification The readers attention is called to the possibility that compliance with this docum

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35、pecification: IMBE is a trademark of Digital Voice Systems, Inc.*Use of the trademark identified in this standard is not an endorsement by TIA. TIA-102.CACA-1 iiiTABLE OF CONTENTS 1 INTRODUCTION 1 1.1 Scope 1 1.2 Background 2 1.3 ISSI Voice Service (IVS) measurement methods 6 1.4 Document organizati

36、on 6 2 REFERENCES 6 2.1 Normative references 6 2.2 Informative references 6 3 DOCUMENT REVISION HISTORY 7 4 ABBREVIATIONS 7 5 TERMS AND DEFINITIONS 7 5.1 IVS Measurement point 7 5.2 IVS Measurement point R 7 5.3 IVS Measurement point I 9 5.4 IVS Reference event 9 5.5 IVS Exit event 9 5.6 IVS Entry e

37、vent 9 6 IVS PERFORMANCE MODELS 9 6.1 IVS reference configurations 9 6.2 IVS reference events 9 6.3 Future IVS reference events 10 6.4 IVS message transfer outcomes 10 7 IVS PERFORMANCE PARAMETERS 11 7.1 IVS call set-up delay 11 7.2 IVS call set-up failure ratio 18 7.3 IVS message transfer delay 20

38、7.4 IVS message loss ratio 26 8 IVS MEASUREMENT PROCEDURES 27 8.1 Overview 27 8.2 IVS call set-up delay 27 8.3 IVS call set-up failure ratio 27 8.4 IVS message transfer delay 27 8.5 IVS message loss ratio 27 9 IVS Measurement Procedures for Use With Consoles 28 9.1 IVS Group Call setup Delay Measure

39、ment Procedures With Consoles 29 9.2 IVS SU-to-SU Call Set Delay Measurement Procedures With Consoles 35 9.3 IVS Group Call MTD Measurement Procedures With Consoles 39 Annex A Characteristics of IVS test equipment (informative) 45 Annex B IVS measurement methods under study (informative) 46 Annex C

40、Guidance for conducting supplemental IVS measurements (informative) 47 Annex D Extended Generic IVS Performance Model 48 Annex E P25 CAI Voice Message Data Units at Data Link Layer of CAI 49 TIA-102.CACA-1 ivAnnex F P25 CAI Voice Message Data Units observed at MPR(1) and MPR(2) 50 Annex G P25 RTP PT

41、T Transmit Progress Packets at RTP-Application Layer of ISSI 51 Annex H P25 RTP PTT Transmit Progress and End Packet Payload observed at MPIs 52 Annex I IVS-CSD and IVS-MTD Composite Parameter Descriptions 53 ADDENDUM INTRODUCTION The purpose of this addendum is to provide an update to TIA-102.CACA,

42、 April 2007, “Project 25 Inter-RF Subsystem Interface Measurement Methods for Voice Services“. This addendum specifies the technical and editorial changes required to include Trunked Console Subsystems as specified in TIA-102.BACA-2, April 2007, in the scope of this document. Addendum Scope This add

43、endum introduces the required changes to TIA-102.CACA, April 2007, “Project 25 Inter-RF Subsystem Interface Measurement Methods for Voice Services“ to add the Trunked Console Subsystem to its scope. In relation to its consoles, a Console Subsystem is considered to be a Serving RFSS or both a Serving

44、 and Home RFSS that connects to other RFSSs using the ISSI as defined in TIA-102.BACA and TIA-102.BACA-2. For the purposes of measurement methods defined herein, the Console Subsystem does not have an equivalent MPR (Measurement Point R as defined in TIA-102.CACA) between a console and the RFSS netw

45、ork for the following reasons. The P25 standards do not address the console user interface or the interface between a single console and its own subsystem. There is no measurable equivalent to the sending and receiving of CAI messages when the source or destination is a console. Also, the P25 trunke

46、d console subsystem interface, Ec, is the interface between a Console Subsystem and another RFSS (essentially its an ISSI between two RFSSs) and does not therefore enable the definition of MPR associated with the Console Subsystem. As such, the MPR-to-MPI parameters specified in TIA-102.CACA do not

47、apply when the end point is a console. However, the MPI-to-MPI parameters do apply to when the end point is a console. Also note that the console is not considered a Network Equipment (NE) device (NE is defined in TIA-102.CACA, April 2007) because individual consoles do NOT communicate with an RFSS

48、through a standardized P25 interface (Ec). The console is considered a device (with most of the characteristics of an SU) internal to the RFSS, with the RFSS acting as a proxy for its consoles. The consoles RFSS (a console subsystem) converts between internal messages to and from individual consoles

49、 and Ec which it utilizes to externally connect to other RFSSs. Figure i-1 depicts this relationship. TIA-102.CACA-1 vSUSU Console SubSystem(Serving RFSS)ServingRFSSServingRFSSHomeRFSSEc=ISSIInternal RFSSProtocol (Not Ec)I PFigure i-1 Trunked Ec is the ISSI (Scope 2) and is an interface between a Console Subsystem and an RFSS This document will only include information relevant to the above-listed functionality. The reader is referred to TIA-102.CACA, April 2007 for all other pertinent information. The next complete revision of TIA-102.CACA will incorporate the