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MIL-STD-188-185 Interoperability Standard For Uhf Misaltcom Dama Control SystemThis standard establishes mandatory requirements applicable to the channel controller \(CC\) to provide the capability for terminals to access pre-assigned \(PA\) or demand-assigned \(DA\) user-to-user communications \(UCOM\) services that operate on either 5-kHz or 25-kHz ultra high frequency \(UHF\) satellite communications \(SATCOM\) channels and represent the minimum requirements that must be implemented. Requirements in this standard may be exceeded by the CC to satisfy specific Department of Defense \(DoD\) requirements, provided interoperability is maintained. For example, the incorporation of additional standard and nonstandard interfaces is not precluded. MIL-STD-188-181 defines the modulation types and rates, forward error correction \(FEC\), interleaving, user-traffic communications security \(COMSEC\), and performance parameters that apply to the bursts employed for each transmission employed in this standard.

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MIL-STD-188-185A

PARAGRAPH

PAGE

DAMA FOW (DFOW) services..........................27

4.4.3.2

Update FOW (UFOW) services........................28

4.4.3.3

DAMA ROW (DROW) services..........................28

4.4.3.4

Ranging services..................................29

4.4.3.5

UCOM services.....................................29

4.4.3.6

Error control.....................................30

4.5

Error detection...................................30

4.5.1

Error correction..................................30

4.5.2

Interleaving......................................30

4.5.3

Security..........................................30

4.6

Orderwire encryption..............................30

4.6.1

UCOM burst encryption.............................30

4.6.2

4.7

Frequency switching...............................31

Modulation........................................31

4.8

DETAILED

REQUIREMENTS .....................................33

5.1

Waveform characteristics..........................33

5.1.1

Types of channels.................................33

5.2

Frame and burst structure.........................34

5.2.1

TDMA frame structure..............................34

5.2.1.1

Frame start time..................................35

5.2.1.2

Frame alignment...................................35

5.2.2

Burst structure and fields........................37

5.2.2.1

SFOW burst fields.................................38

5.2.2.1.1

Preamble element..................................38

5.2.2.1.2

Network Data element..............................38

5.2.2.1.2.1

Orderwire Encryption message......................40

5.2.2.1.2.2

Zeroize message...................................45

5.2.2.1.3

Preplanned Update Data element....................46

5.2.2.1.4

Ranging Data element..............................51

5.2.2.1.5

Services Data element.............................52

5.2.2.2

DFOW burst fields.................................54

5.2.2.2.1

Preamble element..................................56

5.2.2.2.2

Network Data element..............................56

5.2.2.2.3

Preplanned Update Data element....................56

5.2.2.2.4

Ranging Data element..............................56

5.2.2.2.5

DAMA Update Data element..........................56

5.2.2.2.6

Notification element..............................59

5.2.2.2.7

Message element...................................62

5.2.2.2.7.1

Network affiliation messages......................63

5.2.2.2.7.1.1

DFOW:Login Response message.......................63

5.2.2.2.7.1.2

DFOW:Logout/Logout Response message...............65

5.2.2.2.7.1.3

DFOW:Channel Reassignment message.................67

5.2.2.2.7.2

UCOM service access management messages...........69

5.2.2.2.7.2.1

DFOW:Service Channel Assignment message...........69

5.2.2.2.7.2.2

DFOW:Service Parameters Assignment message........72