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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

5.3.4.1

Number of initial-ranging services at startup.....155

5.3.4.2

Number of initial-ranging services after startup

(future growth capability)........................155

5.3.4.3

Number of maintenance-ranging services at startup.156

5.3.4.4

Number of maintenance-ranging services after

startup...........................................156

5.4

Service access protocols..........................157

5.4.1

Preplanned service access protocols...............157

5.4.1.1

Locating preplanned service and maintaining

status............................................158

5.4.1.1.1

Locating desired preplanned services..............158

5.4.1.1.2

Maintaining service status........................158

5.4.1.1.3

Monitoring requirements...........................159

5.4.1.1.4

Service change announcement requirements..........159

5.4.1.1.5

Service change action.............................161

5.4.1.1.5.1

Service teardown..................................161

5.4.1.1.5.2

Service activated.................................161

5.4.1.1.5.3

Service parameters change.........................162

5.4.1.1.6

Connecting to desired UCOM service................162

5.4.1.2

Guard lists.......................................163

5.4.2

Demand-assigned service access protocols..........163

5.4.2.1

DROW backoff number determination.................167

5.4.2.2

Transmitting a DROW...............................168

5.4.2.2.1

Locating DROW time slots..........................168

5.4.2.2.1.1

Locating assigned-DROW time slots.................168

5.4.2.2.1.2

Locating contention-DROW time slots...............168

5.4.2.2.2

Assigned-DROW transmission........................169

5.4.2.2.3

Contention-DROW transmission......................169

5.4.2.2.3.1

Initial transmission of contention DROW...........169

5.4.2.2.3.2

DROW transmission retry protocol..................169

5.4.2.2.3.3

Contention-DROW transmission success..............170

5.4.2.2.4

DROW acknowledgment...............................171

5.4.2.3

Orderwire interchange requirements................171

5.4.2.3.1

Notification message interchange requirements.....173

5.4.2.3.2

Network affiliation message interchange...........176

5.4.2.3.2.1

5.4.2.3.2.1.1

5.4.2.3.2.1.2

5.4.2.3.2.2

Logout............................................179

5.4.2.3.2.2.1

Terminal-initiated logout.........................179

5.4.2.3.2.2.2

PCC-initiated logout..............................179

5.4.2.3.2.3

Channel reassignment..............................180

5.4.2.3.3

UCOM service management message interchange.......181

5.4.2.3.3.1

Service initiation................................181

5.4.2.3.3.1.1

Assign resources to service request...............182

5.4.2.3.3.1.2

Service request rejected..........................190

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