1、 TIA STANDARD Regenerative Satellite Mesh-A (RMS-A) Air Interface - MAC/SLC Layer Specification - Part 2: MAC Layer TIA-1040.2.02 April 2006 TELECOMMUNICATIONS INDUSTRY ASSOCIATION The Telecommunications Industry Association represents the communications sector of NOTICE TIA Engineering Standards an
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21、INCIDENTAL OR CONSEQUENTIAL DAMAGES (INCLUDING DAMAGES FOR LOSS OF BUSINESS, LOSS OF PROFITS, LITIGATION, OR THE LIKE), WHETHER BASED UPON BREACH OF CONTRACT, BREACH OF WARRANTY, TORT (INCLUDING NEGLIGENCE), PRODUCT LIABILITY OR OTHERWISE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THE FORE
22、GOING NEGATION OF DAMAGES IS A FUNDAMENTAL ELEMENT OF THE USE OF THE CONTENTS HEREOF, AND THESE CONTENTS WOULD NOT BE PUBLISHED BY TIA WITHOUT SUCH LIMITATIONS.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 1040.2.02 1Contents Intellectual Property Rights9 Foreword 9 1 Scope10 2 References 10 3 Definitions and abbreviations.10 3.1 Definitio
23、ns. 10 3.2 Abbreviations 11 4 SMAC/SLC overview 12 4.1 General aspects 12 4.2 Terminal identities and addresses. 12 4.2.1 ST Site ID 12 4.2.2 Electronic Serial Number (ESN) 12 4.2.3 Source ID. 12 4.2.4 Bandwidth Control ST ID (BCSTID). 13 4.2.5 Destination MAC Address 13 4.2.6 Destination Sub-Addres
24、s (DSA). 13 4.2.7 Multicast Group ID (MGID). 13 4.2.8 Satellite Next Hop Address (SNHA) 13 5 Satellite Link Control (SLC) sub-layer 14 5.1 Overview . 14 5.1.1 Modes of operation 16 5.1.1.1 SLC-unack mode . 16 5.1.1.2 SLC-ack mode . 17 5.1.1.3 SLC-transparent mode. 17 5.1.2 Procedure description 17 5
25、.1.2.1 Procedures at transmitting side . 17 5.1.2.2 Procedures at receiving side 17 5.1.3 Backwards compatibility requirements 18 5.2 Compression 18 5.3 Security procedures. 18 5.4 Cyclic Redundancy Check 18 5.5 Special messaging procedures 20 5.6 Segmentation and reassembly. 20 5.6.1 Session creati
26、on. 20 5.6.1.1 Session creation on the transmit side 20 5.6.1.2 Session creation on the receive side 20 5.6.2 Segmentation . 21 5.6.2.1 Extended Data Unit (EDU) construction 21 5.6.2.2 Segmentation rules 22 5.6.3 Reassembly 23 5.6.4 Session termination . 24 5.6.4.1 Session termination on the transmi
27、t side 24 5.6.4.2 Session termination on the receive side 24 5.7 Ack-mode 24 5.8 Diagnostic test procedure 25 5.8.1 Overview . 25 5.8.2 Interfaces, SAPs, service definitions and service primitives . 25 5.8.3 SLC peer-to-peer delay tests. 25 5.8.3.1 Initiating ST procedure description. 25 5.8.3.2 Rec
28、eiving ST procedures. 25 5.8.4 Satellite delay tests 26 TIA 1040.2.02 25.8.4.1 Initiating ST procedure description. 26 5.8.4.2 Receiving ST procedures. 26 5.9 Interfaces, SAPs, service definitions, and service-primitives 27 5.9.1 Interfaces with higher layers: IP-SLC 27 5.9.1.1 Service Access Point-
29、SLC-SAP 27 5.9.1.2 Service definitions. 27 5.9.1.3 Service primitives 27 5.9.1.3.1 SLC_UNITDATA . 28 5.9.1.3.2 Primitive parameters 28 5.9.2 Interface with specific ST entities. 28 5.9.3 Logical interface with peer layer 28 5.9.4 Satellite Dependent Adaptation Function. 29 6 Medium Access Control su
30、b-layer.30 6.1 Overview . 30 6.1.1 Modes of operation 30 6.1.1.1 BoD mode 30 6.1.1.2 HVUL mode 30 6.2 Interfaces, SAPs, service definitions, and service primitives 31 6.2.1 Interface with physical layer: MAC-PHY 31 6.2.1.1 Service Access Point . 31 6.2.1.2 Service used. 31 6.2.2 Interfaces with laye
31、r management entities . 31 6.2.3 Logical interfaces with peer layer. 31 6.3 MAC procedures . 31 6.3.1 General procedures 31 6.3.1.1 Network . 31 6.3.1.1.1 System information broadcasting 31 6.3.2 Medium access procedures . 32 6.3.2.1 Initial access procedure . 32 6.3.3 Bandwidth control procedures 3
32、2 6.3.3.1 Volume request protocol . 33 6.3.3.1.1 Mapping of downlink destination ID into destination region IDs 34 6.3.3.2 Rate request protocol. 34 6.3.3.3 Rate modification procedure . 35 6.3.3.4 Rate de-allocation procedure. 35 6.3.4 Bandwidth management procedures. 36 6.3.4.1 Description of UDTS
33、. 36 6.3.4.1.1 Constant Rate (CR) 36 6.3.4.1.2 Constant Rate With Burst (CRWB) 36 6.3.4.1.3 High Priority Burst/Normal Priority Burst 36 6.3.4.1.4 Low Volume Low Latency (LVLL) 37 6.3.4.1.5 Ack-Return UDTS . 37 6.3.4.2 Description of PDS 37 6.3.4.2.1 High priority rate/Low priority rate. 37 6.3.4.2.
34、2 High priority volume/Normal priority volume . 37 6.3.4.2.3 Slotted Aloha (SA) 37 6.3.4.2.4 Persistent Aloha (PA) 37 6.3.4.3 UDTS to PDS mapping . 38 6.3.4.3.1 Constant Rate UDTS mapping 38 6.3.4.3.2 High Priority Burst/Normal Priority Burst UDTS mapping. 38 6.3.4.3.3 Constant Rate with Burst mappi
35、ng 38 6.3.4.3.4 Low Volume Low Latency mapping 38 6.3.4.3.5 Ack Return UDTS mapping 39 6.3.4.4 Management Transport Services (MTS). 39 6.3.4.5 Queue servicing and flow control procedures 40 6.3.4.5.1 Servicing of rate queues 40 6.3.4.5.2 Servicing of volume queues 40 6.3.4.5.3 Queue servicing regula
36、tion procedures. 41 6.3.5 Contention channel access procedures . 43 6.3.5.1 General. 43 6.3.5.1.1 Types of access protocols 43 TIA 1040.2.02 36.3.5.1.2 Success or failure indication 43 6.3.5.1.3 Retransmission. 43 6.3.5.1.4 Mapping transmission probability to potential contention transmission opport
37、unity 44 6.3.5.2 Slotted-Aloha channel access 44 6.3.5.2.1 Types of Slotted Aloha channels. 45 6.3.5.2.2 State machine definitions. 45 6.3.5.2.3 State machine. 45 6.3.5.2.4 Mapping transmission probability to potential SA transmission opportunity 47 6.3.5.2.5 Channel selection. 47 6.3.5.2.6 Slot sel
38、ection 47 6.3.5.3 Persistent Aloha channel access procedure. 48 6.3.5.3.1 Introduction 48 6.3.5.3.2 State machine. 49 6.3.5.3.3 Channel selection. 51 6.3.5.3.4 Slot selection algorithm for PACTO. 52 6.3.5.4 Persistent Aloha channel access procedure-one slot per frame 53 6.3.5.4.1 Introduction 53 6.3
39、.5.4.2 State machine. 53 6.3.5.4.3 Channel selection. 54 6.3.5.4.4 Slot selection algorithm for PACTO. 55 6.3.5.5 Variables 55 6.3.6 Packet filtering procedures 55 6.3.6.1 Packet discrimination procedure. 55 6.3.6.1.1 Data packets. 56 6.3.6.1.2 Signalling packets 56 7 Message functional definition a
40、nd contents .57 7.1 General 57 7.1.1 Packet order of presentation 57 7.1.2 Order of bits within a field 57 7.2 MAC block format 58 7.2.1 MAC downlink block format 58 7.2.2 MAC uplink block format. 58 7.3 Packet header format. 59 7.3.1 Satellite routing field. 59 7.3.1.1 Congestion bit field . 59 7.3
41、.1.2 Drop class field 60 7.3.1.3 Destination type field 60 7.3.1.4 Downlink destination ID field. 60 7.3.2 ST Identification field . 61 7.3.2.1 Destination Sub-Address field 61 7.3.2.2 Aloha field . 63 7.3.2.3 SLC mode field 64 7.3.2.4 Source ID field. 64 7.4 SLC packet data unit format . 64 7.4.1 S
42、LC unack mode header format . 64 7.4.1.1 Header for unfragmented (whole) data packet . 65 7.4.1.2 Header for first segment data packet. 65 7.4.1.3 Header for middle segment data packet 65 7.4.1.4 Header for last segment data packet 65 7.4.2 SLC ack mode header format 65 7.4.3 SLC header field defini
43、tions . 66 7.4.3.1 Session number field . 66 7.4.3.2 First and last bits fields 66 7.4.3.3 Packet sequence number field. 66 7.4.3.4 Cmp field . 66 7.4.3.5 Frm field 66 7.4.3.6 Sec field . 66 7.4.3.7 CRC type field . 67 7.4.3.8 Bytes in last segment field 67 7.4.3.9 E bit field . 67 7.4.4 SLC extensi
44、on header format 67 TIA 1040.2.02 47.4.4.1 Extension header length field9 67 7.4.4.2 Extension header type 67 7.4.4.3 Extension header value 68 7.4.5 Frame header format . 68 7.4.6 Security header format 68 7.4.6.1 A/B field 68 7.4.6.2 Pad count field . 68 7.4.6.3 Initial vector field 69 7.4.7 Null
45、packet format. 69 7.5 MAC/SLC message types. 69 7.5.1 Common field definitions . 70 7.5.1.1 Spare fields 70 7.5.1.2 Carrier mode field 70 7.5.1.3 Rate 71 7.5.1.4 D/C field 71 7.5.1.5 Sub band designator 71 7.5.1.6 Carrier designator 71 7.5.1.7 Channel Group ID . 71 7.5.1.8 Bandwidth Control ST ID .
46、71 7.5.1.9 A/B key 71 7.5.1.10 Bandwidth control message common fields . 71 7.5.1.10.1 Message type 72 7.5.1.10.2 IF version . 72 7.5.1.10.3 Number assignments/acknowledgements/spare (5 bits) .72 7.5.1.10.4 Uplink frame number. 72 7.5.1.10.5 Number of contention channels/spare. 72 7.5.1.11 TOD check
47、. 72 7.5.1.11.1 Uplink frame number TOD check relationship. 72 7.5.1.12 Padding byte 73 7.5.2 Transmission Information Packet message 73 7.5.2.1 Packet header field values . 75 7.5.2.2 Transmission information packet message field definition 75 7.5.2.2.1 Satellite Network ID 75 7.5.2.2.2 CM bit 75 7
48、.5.2.2.3 TM bit 75 7.5.2.2.4 CP bit 75 7.5.2.2.5 TP bit 75 7.5.2.2.6 Current PTP slot number . 76 7.5.2.2.7 Transition PTP slot number. 76 7.5.2.2.8 TDM frame transition superframe number . 76 7.5.2.2.9 TDM frame transition downlink frame number 76 7.5.2.2.10 Future spare 1 and protocol switch 76 7.
49、5.2.2.11 Future spare 2 and protocol switch 76 7.5.2.2.12 TOD to UTC offset 77 7.5.2.2.13 Absolute superframe count 77 7.5.2.2.14 Ephemeris data. 77 7.5.2.2.15 Nb cont. 77 7.5.2.2.16 Dedicated contention channel information . 77 7.5.3 ULPC status message format 77 7.5.3.1 ULPC status message field definition. 80 7.5.3.1.1 Carrier groupings . 80 7.5.3.1.2 Uplink frame number field 80 7.5.3.1.3 Superframe number field. 80 7.5.3.1.4 Noise measurement field . 80 7.5.3.1.5 Time slot measurement field . 80 7.5.4 Bandwidth request message 81 7.5.4.1 Authorization information. 81 7.5
