Digiplexer 246 v2.5.x User Manual – 11/2010
Page 60
Head Office : Parc d’activites Kennedy - 20, avenue Neil Armstrong – F-33700 Bordeaux-Merignac (France)
Tel +33 (0)5 57 928 928 – Fax +33 (0)5 57 928 929 –
–
www.audemat.com
The insertion of ODA groups is governed by the following rules:
The insertion of ODA groups is governed by the following rules:
•
No ODA group should start outside the activity window.
•
No ODA group should start outside the activity window.
•
An ODA group may be completed outside the activity window.
•
An ODA group may be completed outside the activity window.
•
Ta, Tw, and Td have to be multiples of one second, with 60 s/(Ta + Tw) = n (where n: integer >
0).
•
Ta, Tw, and Td have to be multiples of one second, with 60 s/(Ta + Tw) = n (where n: integer >
0).
The actual values of these parameters should be assumed to be either default values or be coded into
the system information.
The actual values of these parameters should be assumed to be either default values or be coded into
the system information.
Priority setting
(4)
:
In order to offer flexibility for different OD applications, the ODA free-format group is sent to the
encoder with one of the following priorities: normal, "extremely urgent" or "immediate" transmission.
A group sent with normal priority will be added to the specified free-format group buffer for
transmission according to the group sequence and resource allocation configuration. A group sent
with "extremely urgent" priority will bypass the free-format buffer and will be sent as soon as possible
according to the group sequence and resource allocation configuration. A group sent for "immediate"
transmission is immediately transmitted regardless of the group sequence, but respecting the priority
of 1A and 4A groups.
The relative priority setting for different groups can also be configured in order to explicitly define the
relative priority for groups competing to be transmitted outside of the normal group sequence: e.g.
14B, 15B and repetitions of ODA "Burst mode" groups.
Number of
Time Slots
Delay Time in
seconds (T
d
)
Time Window in
seconds (T
w
)
