TIA-1181-2010 Forward Link Only Messaging Transport Specification- Support for Emergency Alert Service for Forward Link Only Terrestrial and Non-Terrestrial Mobile Multimedia Multi.pdf

1、 TIA-1181 June 2010 Forward Link Only Messaging Transport Specification- Support for Emergency Alert Service for Forward Link Only Terrestrial and Non-Terrestrial Mobile Multimedia Multicast Systems Specification NOTICE TIA Engineering Standards and Publications are designed to serve the public inte

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6、tations before its use. (From Standards Proposal No. 3-0375, formulated under the cognizance of the TIA TR-47 Terrestrial Mobile Multimedia Multicast, TR-47.1 Subcommittee on Terrestrial Mobile Multimedia Multicast based on Forward Link Only Technology). Published by TELECOMMUNICATIONS INDUSTRY ASSO

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22、 DAMAGES. THE FOREGOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. Forward Link Only Messaging Transport Specification TIA-1181 i Table of Contents 1 Introduction and Scope 6 2 Apparatus .

23、7 2.1 Compliance Terminology 7 2.2 Symbols and Abbreviations.7 2.3 Definitions7 2.4 Binary Message Format Specifications.8 2.5 Normative References 8 3 Forward Link Only Messaging Transport .9 3.1 Introduction9 3.2 Reference Architecture .9 3.3 FMT Protocol Architecture 9 3.4 FMT Packet Format 10 3.

24、5 FMT Packet Fragmentation.11 ANNEX A FMT Message Type values (Normative)13 TIA-1181 Forward Link Only Messaging Transport Specification ii Table of Figures Figure 3-1: Reference Architecture and FMT scope 9 Figure 3-2: FMT Protocol Architecture 9 Figure 3-3: An example FMT Packet Fragmentation 12 F

25、orward Link Only Messaging Transport Specification TIA-1181 iii Table of Tables Table 2-1: Example Message Specification . 8 Table 3-1: FMT Packet Format. 10 TIA-1181 Forward Link Only Messaging Transport Specification 5 FOREWORD 1 (This foreword is not part of this Standard.) 2 This specification i

26、s intended for use in Forward Link Only (TR 47.1) Networks. 3 This document is version 1.0 of this specification. 4 This specification makes use of certain standards and specifications listed in Section 2.5. 5 Forward Link Only Messaging Transport Specification TIA-1181 6 1 INTRODUCTION AND SCOPE 1

27、This document specifies the Forward Link Only Messaging Transport mechanism - a mechanism for 2 low latency transport of short messages over the Forward Link Only air interface 1. The Forward 3 Link Only Messaging Transport (FMT) mechanism is intended for utilization by applications such as 4 Emerge

28、ncy Alert Service (EMAS). This specification defines the protocol of the FMT mechanism. 5 Specifications of applications that utilize the FMT are outside the scope of this specification. 6 Chapter 1: An informative chapter describing the scope and the organization of the document. 7 Chapter 2: A nor

29、mative chapter defining compliance terminology, acronyms, definitions of terms, 8 conventions for specifying data types, and references. 9 Chapter 3: A normative chapter describing the Forward Link Only Messaging Transport mechanism. 10 TIA-1181 Forward Link Only Messaging Transport Specification 7

30、2 APPARATUS 1 2.1 Compliance Terminology 2 The key words “shall”, “shall not”, “should”, “should not”, “may”, “need not”, “can” and “cannot”, when 3 used in this standard, shall be interpreted as described in the TIA Style Manual. 4 2.2 Symbols and Abbreviations 5 The following symbols and abbreviat

31、ions are used in this Standard: 6 CPP: Control Protocol Packet 7 EMAS: Emergency Alert Service 8 FMT: Forward Link Only Messaging Transport 9 LOI: Local Operations Infrastructure 10 TIA: Telecommunications Industry Association 11 WOI: Wide Operations Infrastructure 12 2.3 Definitions 13 The followin

32、g definitions apply to capitalized terms used in this specification: 14 Term Definition Device Customer Equipment that implements TIA-1099 1. Local-area Local-area refers to a market, typically a metropolitan area. Local-area Operations Infrastructure (LOI) LOI is a group of transmitters that provid

33、e coverage to a Local-area. LOI_ID Identifier assigned to a LOI. This also identifies the local area the LOI covers. Network A mobile multimedia multicast head-end infrastructure that implements TIA-1099 1. Wide-area Wide-area refers to a set of markets, typically one or more metropolitan areas. Wid

34、e area Operations Infrastructure (WOI) WOI is a group of transmitters that provide coverage to a Wide area WOI_ID Identifier assigned to a WOI. This also identifies the wide area the WOI covers. 15 Forward Link Only Messaging Transport Specification TIA-1181 8 2.4 Binary Message Format Specification

35、s 1 Binary message formats are specified in tables. An example is shown in Table 2-1 2 Field Size (bits) Format fieldA fieldB fieldC for (i=0; i fieldC; i+) fieldD fieldE 16 8 8 16 Variable uilsbf uilsbf uilsbf uilsbf byteString Table 2-1: Example Message Specification 3 The topmost field in the tab

36、le is the first field serialized into the binary message. In this example 4 fieldA is the first field; fieldB is the second field and so on. The size of the fields is specified in the 5 second column and the format is specified in the third column. For example fieldA is 16 bit long and 6 its format

37、is uilsbf “unsigned int significant lowest bit first”. So fieldAs value is serialized as 7 unsigned 16 bits with least significant bit being the first bit; the next significant bit being the second bit 8 and so on. In this example, there could be multiple instances of fieldD depending on the value o

38、f 9 fieldC. The message format specification uses a C-language syntax style. Conditional fields are 10 represented using “if” statements, and repetitive fields are represented using “for” statements. The 11 last field, fieldE, is a variable length field of byteString format. Unless specified, byteSt

39、rings are 12 serialized as is - that is the first bit of the byteString is the first bit of fieldE. 13 2.5 Normative References 14 The following standards contain provisions which, through reference in this text, constitute provisions 15 of this specification. At the time of publication, the edition

40、s indicated were valid. All standards are 16 subject to revision, and parties to agreements based on this specification are encouraged to 17 investigate the possibility of applying the most recent editions of the standards indicated below. TIA 18 maintains registries of currently valid national stan

41、dards published by them. 19 20 1 TIA-1099, Forward Link Only Air Interface Specification for Terrestrial Mobile Multimedia 21 Multicast, March 2007. 22 2 TIA-1099-A, Forward Link Only Air Interface Specification for Terrestrial Mobile Multimedia 23 Multicast, April 2009. 24 3 TIA-1099-B, Forward Lin

42、k Only Air Interface Specification for Terrestrial Mobile Multimedia 25 Multicast, to be published. 26 TIA-1181 Forward Link Only Messaging Transport Specification 9 3 FORWARD LINK ONLY MESSAGING TRANSPORT 1 3.1 Introduction 2 Forward Link Only Networks efficiently distribute broadband multimedia co

43、ntent over multicast 3 wireless networks to mobile Devices supporting large numbers of subscribers. Physical, MAC and 4 control/stream layers for a Forward Link Only Network are specified in 1 2 3. This document 5 specifies Forward Link Only Messaging Transport mechanism - a mechanism for low latenc

44、y 6 transport of short messages over the Forward Link Only air interfaces 1 2 3 . 7 3.2 Reference Architecture 8 9 Figure 3-1: Reference Architecture and FMT scope 10 Figure 3-1 shows the reference architecture relevant to FMT. Applications like EMAS could use FMT 11 for the delivery of application

45、messages. The Application Server is responsible for generation of 12 application messages or collection of application messages from other Servers. The Application 13 Server sends the application messages to a Forward Link Only Broadcast Network for delivery of the 14 message over the FMT Layer. The

46、 FMT Layer utilizes the Control Channel defined in 1 for delivery 15 of application messages. The Application Server and the interface between the Application Server 16 and Forward Link Only Broadcast Network are outside the scope of this specification. 17 3.3 FMT Protocol Architecture 18 19 20 Figu

47、re 3-2: FMT Protocol Architecture 21 Application messages from Applications that utilize FMT are obtained at the FMT layer. The FMT layer 22 prefixes an FMT header to every application message to generate an FMT Packet. FMT Packets are 23 fragmented into FMT Fragments to be sent as Control Protocol

48、Packets over the Control Channel. 24 Forward Link Only Messaging Transport Specification TIA-1181 10 3.4 FMT Packet Format 1 Field Size (bits) Format fmtHeader fmtMsgType fmtMessageId woiCount for (i=0; iwoiCount; i+) woiId loiCount for (i=0; iloiCount; i+) loiId length fmtPayload 8 16 8 16 8 16 16

49、Variable uilsbf uilsbf uilsbf uilsbf uilsbf uilsbf uilsbf byteString Table 3-1: FMT Packet Format 2 Table 3-1 shows the FMT Packet format. An FMT Packet consists of an fmtHeader and an 3 fmtPayload. The following paragraphs contain field descriptions. 4 fmtMsgType 5 fmtMsgType identifies the Type of the message carried in an FMT Payload. Values 0-223 are 6 reserved for the use of common messaging services such as Emergency Alerts. Please see 7 Appendix A for a list of common messaging services over FMT and their fmtMs