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Cuadro A.42/J.116 − − − − Estructura del mensaje control de transmisión
Transmission_Control_Message(){
Transmission_Control_Field
reservado
Stop_Upstream_Transmission
Start_Upstream_Transmission
Old_Frequency_Included
Switch_Downstream_OOB_Frequency
Switch_Upstream_Frequency
si (Transmission_Control_Field==
Switch_Upstream_Frequency &&
Old_Frequency_Included){
Old_Upstream_Frequency
}
si (Transmission_Control_Field==
Switch_Upstream_Frequency){
New_Upstream_Frequency
New_Upstream_Channel_Number
reservado
Upstream_Rate
MAC_Flag_Set
Reservado
New_Upstream_Frequency
}
si (Transmission_Control_Field==
Switch_Downstream_OOB_Frequency &&
Old_Frequency_Included){
Old_Downstream__OOB_Frequency
}
si (Transmission_Control_Field==
Switch_Downstream_OOB_Frequency){
New_Downstream_OOB_Frequency
DownStream_Type
}
}
Campo de control de la transmisión
Transmission_Control_Field especifica el control que se ejerce sobre el canal ascendente.
Detención de la transmisión ascendente
stop_upstream_transmission es de naturaleza booleana y cuando se pone a uno indica que la NIU
debe detener la transmisión ascendente.
Bits
Bytes
Número de bits/descripción
8
3
7-5:
1
4: {no, sí}
1
3: {no, sí}
1
2: {no, sí}
1
1: {no, sí}
1
0: {no, sí}
(32)
(4)
(32)
(4)
3
1
7:5
2
4:3
3
2:0
5
1
7:3
3
2:0
(32)
(4)
(32)
(4)
(32)
(4)
8
1
UIT-T J.116 (05/2000)
81
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