1、 TIA STANDARD Wideband Air Interface Logical Link Control (LLC) Layer Specification TIA-902.BAAE-A (Upgrade and Revision of TIA-902.BAAE) February 2007 TELECOMMUNICATIONS INDUSTRY ASSOCIATION Representing the telecommunications industry in association with the Electronic Industries Alliance ANSI/TI
2、A-902.BAAE-A Approved: February 12, 2007 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NOTICE TIA Engineering Standards and Publications are designed to serve the public inter
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7、ations before its use. (From Standards Proposal No. 3-0081-UGRV, formulated under the cognizance of theTIA, TR-8.5 Mobile and Personal Private Radio Standards, Subcommittee on Data ).Published by TELECOMMUNICATIONS INDUSTRY ASSOCIATION Standards and Technology Department 2500 Wilson Boulevard Arling
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25、icense from IHS-,-,-WAI LLC Layer Specification TIA-102.BAAE-A i Foreword (This foreword is not part of this standard.) This document has been published by the Telecommunications Industry Association (TIA) in accordance with the terms and conditions provided for in a Memorandum of Understanding (MoU
26、) executed by and between the TIA, the Associated Public-Safety Communications Officials (APCO), the National Association of State Telecommunications Directors (NASTD), and the various agencies of the Federal government (FED). This TIA Standard is being promulgated and will be maintained by the TR-8
27、.5 Signaling and Data Transmission committee, and working groups under the sponsorship of the Telecommunications Industry Association. This document has been published as a TIA Standard because it contains useful technical information on emerging digital techniques for Land Mobile Radio Service. In
28、particular, it describes the wideband air interface logical link control layer technology. Generally, the wideband air interface has been developed by TIA TR-8.5 to be consistent with the Statement of Requirements adopted by the National Coordination Committees Interoperability Subcommittee, WG6 Wid
29、eband Data. This document references that the primary user needs document will be “APCO Project 25/34 Statement of Requirements (P34SOR)”. This logical Link control layer specification provides a standard for the definition and control of transmission for high-speed digital information over 50, 100,
30、 and 150 kHz bandwidth physical radio media. 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 wideband data compliant equipment. Some aspects of the s
31、pecifications 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. While all reasonable efforts have been made to ensur
32、e the accuracy of this document, it should be understood that significant work remains in fully developing the standard series and this document will be updated as necessary. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or netw
33、orking permitted without license from IHS-,-,-TIA-902.BAAE-A WAI LLC Layer Specification ii Patent Identification The readers attention is called to the possibility that compliance with this document may require the use of one or more inventions covered by patent rights. By publication of this docum
34、ent, no position is taken with respect to the validity of those claims or any patent rights in connection therewith. The patent holders so far identified have, we believe, filed statements of willingness to grant licenses under those rights on reasonable and nondiscriminatory terms and conditions to
35、 applicants desiring to obtain such licenses. The following patent holders and patents have been identified in accordance with the TIA intellectual property rights policy: None currently identified TIA shall not be responsible for identifying patents for which licenses may be required by this docume
36、nt or for conducting inquiries into the legal validity or scope of those patents that are brought to its attention. Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-WAI LLC Layer
37、 Specification TIA-102.BAAE-A iii TABLE OF CONTENTS 1. SCOPE1 2. TERMS.2 3. GENERAL LLC LAYER DESCRIPTION.3 3.1 LLC LOGICAL LINK TYPES3 3.1.1 Control Plane (CP) Link .3 3.1.2 User Plane (UP) Link3 3.2 LLC INTERFACE TO SERVICE USERS .4 3.3 LLC INTERFACE TO MAC/RLA LAYER4 3.4 LLC SERVICES 4 3.4.1 Unco
38、nfirmed Delivery Service 5 3.4.2 Confirmed Delivery Service 5 3.4.3 Extended Error Detection5 3.4.4 Flow Control .5 3.4.5 Windowing.5 3.4.6 Bundling of LLC Data .6 3.4.7 Signaling Fragmentation.6 3.4.8 State Variables 6 3.4.9 Logical Link and Service Relationships 7 4. CONTROL PLANE OPERATION FOR AL
39、L CONFIGURATIONS.8 4.1 LINK STATE TRANSITION DIAGRAM8 4.1.1 Closed State.8 4.1.2 Open State .8 4.2 CP LINK PARAMETERS 9 4.3 LINK STATE VARIABLES .9 4.4 CONFIRMED SIGNALING TRANSFER PROCEDURES 9 4.4.1 MTU Size .10 4.4.2 Transmission .10 4.4.3 Sliding Window ARQ.10 4.4.4 Reception.11 4.4.5 ARQ Retrans
40、mission11 4.4.6 Confirmed Signaling Transfer Example MSC.12 4.5 UNCONFIRMED SIGNALING TRANSFER PROCEDURES.12 4.5.1 MTU Size .12 4.5.2 Transmission .12 4.5.3 Reception.13 4.5.4 Unconfirmed Signaling Transfer Example MSC.13 5. USER PLANE LLC OPERATION FOR ALL CONFIGURATIONS .14 5.1 LINK STATE TRANSITI
41、ON DIAGRAMS FOR FNE CONFIGURATIONS .14 5.1.1 Closed State.15 5.1.2 Connect State (MRC Only)15 5.1.3 Open State .15 5.1.4 Reconnect State .16 5.2 LINK STATE TRANSITION DIAGRAMS FOR DIRECT CONFIGURATIONS .16 5.3 UP LINK PARAMETERS 16 5.3.1 UP Link Connection Example MSC 17 5.3.2 UP Link Reconnection E
42、xample MSC.18 5.3.3 Link State Variables 18 5.4 CONFIRMED DATA TRANSFER PROCEDURES19 5.4.1 MTU Size and Segmentation .19 5.4.2 Transmission .19 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction or networking permitted without licens
43、e from IHS-,-,-TIA-902.BAAE-A WAI LLC Layer Specification iv 5.4.3 Sliding Window SARQ 19 5.4.4 Reception 20 5.4.5 SARQ Retransmission. 20 5.4.6 Bundling 21 5.4.7 Confirmed Data Transfer Example MSC 22 5.5 UNCONFIRMED DATA TRANSFER PROCEDURES 23 5.5.1 MTU Size and Segmentation. 23 5.5.2 Transmission
44、. 23 5.5.3 Reception 23 5.5.4 Bundling 23 5.5.5 Unconfirmed Data Transfer Example MSC 24 6. LLC PDU FORMAT DEFINITION . 25 6.1 CONTROL PLANE (CP) LINK PDUS 25 6.1.1 CP_DATA . 25 6.1.2 CP_RES 25 6.2 USER PLANE (UP) LINK PDUS 26 6.2.1 UP_CONNECT. 26 6.2.2 UP_DISC 26 6.2.3 UP_DATA. 26 6.2.4 UP_ DATA_EN
45、D 27 6.2.5 UP_BUNDLE .27 6.2.6 UP_ RES. 28 7. LLC INFORMATION ELEMENT DEFINITION 29 7.1 COMMON ELEMENTS 29 7.1.1 ACK / NACK (A/N) . 29 7.1.2 ACK Request (AR) 29 7.1.3 FCS Present (F) 29 7.1.4 Frame Check Sequence (FCS) 29 7.1.5 LLC Format 31 7.1.6 Service Access Point (SAP). 31 7.1.7 Type 32 7.2 CON
46、TROL PLANE SPECIFIC ELEMENTS. 33 7.2.1 Control PDU Length (CL) 33 7.2.2 Fragment Sequence Number Field (FSNF) 33 7.3 USER PLANE SPECIFIC ELEMENTS. 33 7.3.1 ACK Bitmap 33 7.3.2 Bitmap Size (BMS) 33 7.3.3 Bundle Header (BH). 34 7.3.4 Disconnect Type (DT). 34 7.3.5 Flow Control (RR) 34 7.3.6 Pad Octets
47、 (PAD) . 34 7.3.7 Response Code (RC). 35 7.3.8 Reconnect Flag (RF).35 7.3.9 Sent Segment Number S(S) . 36 7.3.10 Service Data Unit (SDU) . 36 7.3.11 Service Data Unit (SDU) Segment. 36 7.4 USER PLANE NEGOTIATED PARAMETERS 36 7.4.1 UP Window Size (NL.200) 36 7.4.2 UP Number of Confirmed Retries (NL.2
48、01) . 36 7.4.3 UP MTU Size (NL.202). 36 7.4.4 UP Acknowledgement Timeout (TL.200) 37 7.4.5 UP Flow Control Timeout (TL.201) . 37 7.4.6 UP Receive Timeout (TL.202) 37 8. REFERENCES 38 Copyright Telecommunications Industry Association Provided by IHS under license with EIANot for ResaleNo reproduction
49、 or networking permitted without license from IHS-,-,-WAI LLC Layer Specification TIA-102.BAAE-A v Table of Figures FIGURE 1. GENERAL WIDEBAND DATA SYSTEM MODEL.1 FIGURE 2. CP LINK STATE TRANSITION DIAGRAM .8 FIGURE 3. EXAMPLE CP CONFIRMED SIGNALING TRANSFER MSC.12 FIGURE 4. EXAMPLE CP UNCONFIRMED SIGNALING TRANSFER MSC .13 FIGURE 5. MRC UP LLC STATE
