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22、E PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS. Forward Link Only System Information Delivery Layer Specification TIA-1205 ii Table of Contents 1 Introduction and Scope 6 2 Apparatus .7 2.1 Compliance Terminology 7 2.2 Symbols and Abbreviations.7 2.3 Definitions7 2.4 Binary Message Format Specification
23、s.9 2.5 Normative References 9 3 SI Delivery Layer Overview 10 3.1 Protocols Architecture.10 3.2 Multiplexes and Overhead Flows in a Multiplex11 4 Primary Protocol.12 4.1 Protocol Architecture and Primary Message Delivery 12 4.2 Primary Message syntax.12 4.3 Transport Layer Configuration 17 5 SI Tra
24、nsport Protocols18 5.1 SI Compression and Decompression Protocol.18 5.2 SI Fragmentation and Reassembly Protocol 19 5.3 System Information Fragment Format 19 5.3.1 siFragmentHeader19 5.3.2 siFragmentTrailer22 TIA-1205 Forward Link Only System Information Delivery Layer Specification iii Table of Fig
25、ures Figure 3-1: SI Delivery Layer Architecture 10 Figure 3-2: Protocols of SI Delivery Layer 10 Figure 3-3: Multiplexes concept 11 Figure 4-1: Primary Protocol Architecture. 12 Figure 4-2: Event Blocks concept. 14 Figure 5-1: SI Transport Protocol Data Units . 18 Forward Link Only System Informatio
26、n Delivery Layer Specification TIA-1205 iv Table of Tables Table 2-1: Example Message Specification .Error! Bookmark not defined. Table 4-1: Primary Message syntax . 12 Table 4-2: mpgInfoType syntax 14 Table 4-3: mktplaceInfoType syntax. 16 Table 4-4: trailerType syntax 17 Table 5-1: System Informat
27、ion Fragment Format. 19 Table 5-2: System Information Fragment Header Format 20 Table 5-3: Allowed Values for messageId 20 Table 5-4: Allowed Values for messageCompressionType 22 TIA-1205 Forward Link Only System Information Delivery Layer Specification 5 FOREWORD 1 (This foreword is not part of thi
28、s Standard.) 2 This specification is intended for use in Forward Link Only (TR 47.1) Networks. 3 This specification is version 1.0 of the SI Delivery Layer. 4 This specification makes use of certain standards and specifications listed in Section 2.5. 5 Forward Link Only System Information Delivery L
29、ayer Specification TIA-1205 6 1 INTRODUCTION AND SCOPE 1 This specification specifies Forward Link Only System Information Delivery Layer - a set of Protocols 2 involved in the acquisition of System Information 1 messages in a Forward Link Only Network. The 3 specification includes Primary Protocol,
30、 System Information Compression i fieldC; i+) fieldD fieldE 16 8 8 16 Variable uilsbf uilsbf uilsbf uilsbf byteString The topmost field in the table is the first field serialized into the binary message. In this example 5 fieldA is the first field; fieldB is the second field and so on. The size of t
31、he fields is specified in the 6 second column and the format is specified in the third column. For example field A is 16 bit long and 7 its format is uilsbf “unsigned int lowest bit first”. So field As value is serialized as unsigned 16 bits 8 with least significant bit being the first bit; the next
32、 significant bit being the second bit and so on. In 9 this example, there could be multiple instances of fieldD depending on the value of fieldC. The 10 message format specification uses a C-language syntax style. Conditional fields could be 11 represented using “if” statements. fieldE is a variable
33、 length field of byteString format. Unless 12 specified, byteStrings are 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
34、 this specification. At the time of publication, the editions 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.
35、TIA 18 maintains registries of currently valid national standards published by them. 19 1 TIA-1178, Forward Link Only System Information Specification, 2009 20 2 TIA-1120, Forward Link Only Transport Specification, 2007 21 3 TIA-1099-B, Forward Link Only Air Interface Specification for Terrestrial M
36、obile Multimedia 22 Multicast, 2010 23 4 ITU-T Recommendation X.691, Information technology ASN.1 encoding rules: Specification 24 of Packed Encoding Rules (PER), 2002 25 5 RFC 1950, ZLIB Compressed Data Format Specification version 3.3, 1996 26 6 RFC 1952, GZIP file format specification version 4.3
37、, 1996 27 Forward Link Only System Information Delivery Layer Specification TIA-1205 10 3 SI DELIVERY LAYER OVERVIEW 1 3.1 Protocols Architecture 2 FLO Air Interface Layers (TIA-1099)Transport Layer (TIA-1120)Media Adaptation Layer (TIA1130)System Information(TIA-1178)System Information Delivery Lay
38、erLegendOther TIA TR 47.1 StandardsScope of this documentApplication LayerApplication Layer protocols3 Figure 3-1: SI Delivery Layer Architecture 4 Figure 3-1 shows various Forward Link Only Protocols. System Information (SI) Delivery Layer is 5 responsible for delivering SI over the Transport Layer
39、. System Information is specified in TIA 1178 6 1 and Transport Layer is specified in TIA 1120 2. 7 8 Figure 3-2: Protocols of SI Delivery Layer 9 Figure 3-2 shows various protocols on the SI Delivery Layer. Primary Protocol is responsible for 10 delivery of Primary Messages. A Primary Message conta
40、ins information on the state of SI Messages. 11 SI Compression inumEventBlocks; i+) eventBlockVersion 16 32 16 8 8 16 uilsbf uilsbf uilsbf uilsbf uilsbf uilsbf 14 4.2.6.1 mpgInfoVersion 15 The mpgInfoVersion indicates the overall version of the mpgInfo. It can be used by the Device to 16 identify ch
41、anges in the contents of mpgInfo in successive acquisitions of Primary Messages. The 17 Network shall change the mpgInfoVersion if any other fields in the mpgInfo change. 18 4.2.6.2 mpgStartTime 19 The mpgStartTime field indicates the earliest Start Time of the Event Blocks carried in the Multiplex.
42、 It 20 is given as a 32-bit count of seconds in UTC time since 00:00:00 UTC January 1, 1970. The Start 21 TIA-1205 Forward Link Only System Information Delivery Layer Specification 15 Time of an Event Block is the same as the start_time attribute in the event_block SI XML Message 1 defined in 1. 2 4
43、.2.6.3 eventBlockDuration 3 The eventBlockDuration field indicates the duration (in seconds) of every Event Block carried in the 4 Multiplex. 5 4.2.6.4 numNearTermEventBlocks 6 The numNearTermEventBlocks field indicates the number of Near Term Event Blocks transported in 7 the Multiplex. 8 4.2.6.5 n
44、umEventBlocks 9 The numEventBlocks field indicates the total number of Event Blocks transported in the Multiplex. 10 4.2.6.6 eventBlockVersion 11 Multiple eventBlockVersion fields may be present depending on the numEventBlocks. An 12 eventBlockVersion field indicates the current version of an Event
45、Block carried in the Multiplex. The 13 Network shall populate the eventBlockVersion with the same value as the version attribute in the 14 Event Block SI XML Message. 15 The first eventBlockVersion field corresponds to the Event Block with Start Time = mpgStartTime. 16 The second eventBlockVersion f
46、ield corresponds to the EventBlock with StartTime = (mpgStartTime 17 + eventBlockDuration) and so on. The ntheventBlockVersion field corresponds to the EventBlock with 18 StartTime = (mpgStartTime + (n-1)*eventBlockDuration). 19 4.2.7 mktplaceInfoPresence 20 The mktplaceInfoPresence field indicates
47、the presence or absence of mktplaceInfo in the Primary 21 Message. A mktplaceInfoPresence value of 1 indicates the presence of mktplaceInfo and a value of 0 22 indicates the absence of mktplaceInfo. If a Network does not carry Common Marketplace and 23 Content Retailer Marketplace messages 1 in a Mu
48、ltiplex, then the Network shall not carry 24 mktplaceInfo in the Primary Message of the Multiplex. A Network shall either carry both Common 25 Marketplace and Content Retailer Marketplace messages in a Multiplex or neither of them. 26 4.2.8 srvcDefnInfoPresence 27 The srvcDefnInfoPresence field indi
49、cates the presence or absence of srvcDefnInfo in the Primary 28 Message. A srvcDefnInfoPresence value of 1 indicates the presence of srvcDefnInfo and a value of 0 29 indicates the absence of srvcDefnInfo. If a Network does not carry Service Definition Message in a 30 Multiplex, then the Network shall not carry srvcDefnInfo in the Primary Message of the Multiplex. 31 4.2.9 reserved1 32 The reserved1 field is reserved for legacy implementation. 33 4.2.10 mktplaceInfo 34 The mktplaceInfo field provides information on the Common Marketplace and Content Re
