Zeni Lite Buoy Co. Ltd. 4180026 ユーザーズマニュアル
Configuration using proAtoN
Page 35
Adding additional messages to the schedule
Additional binary data messages can be added to the schedule table by selecting the required message type
from the drop down at the top of this tab, then clicking the ‘Add’ button. The available message types are:
from the drop down at the top of this tab, then clicking the ‘Add’ button. The available message types are:
● Message #8 - for broadcast of binary data to all other stations in range. The binary data may be
provided by the extended sensor interface (if present) or third party equipment connected to the
transceiver. See section 8 for further information.
transceiver. See section 8 for further information.
● Message #6 - for transmission of binary data to an individual destination MMSI. The destination MMSI
is set on the ‘Real AtoN’ tab. The binary data may be provided by the extended sensor interface (if
present) or third party equipment connected to the transceiver. See section 8 for further information.
present) or third party equipment connected to the transceiver. See section 8 for further information.
● Message #12 - for transmission of text messages to an individual destination MMSI. The destination
MMSI is set on the ‘Real AtoN’ tab. This schedule is used for transmission of alert messages (see
section 7.3.7).
section 7.3.7).
● Message #14 - for broadcast of text messages to all other stations in range. This schedule is used for
transmission of alert messages (see section 7.3.7).
Up to four separate schedules are available for each binary message type. Each individual schedule has an
index from 1 to 4 which is used to identify that schedule (for example, message #8 index 2).
index from 1 to 4 which is used to identify that schedule (for example, message #8 index 2).
Access scheme selection
The access scheme for each message must be selected as either FATDMA or RATDMA (see section 3.2). The
selection is made by selecting the required row in the schedule table, then clicking on the current access
scheme in that row. A drop down menu will then appear in that location allowing selection of the required
access scheme.
selection is made by selecting the required row in the schedule table, then clicking on the current access
scheme in that row. A drop down menu will then appear in that location allowing selection of the required
access scheme.
● FATDMA
Configuration of an FATDMA schedule continues in section 7.3.3.
● RATDMA
Configuration of an RATMDA schedule continues in section 7.3.4.
7.3.3
FATDMA Schedule configuration
Using the FATDMA (Fixed Access TDMA) access scheme the actual slot for each transmission made by the
transceiver is specified. There are 2250 slots per minute (or frame) on each AIS channel. The scheduled slots
must be reserved for the transceiver by an AIS base station operating in the same area using AIS message
#20. Further information on FATDMA reservations and slot allocation schemes can be found in IALA A-124,
Appendix 14.
The parameters required for an FATDMA schedule are as follows.
transceiver is specified. There are 2250 slots per minute (or frame) on each AIS channel. The scheduled slots
must be reserved for the transceiver by an AIS base station operating in the same area using AIS message
#20. Further information on FATDMA reservations and slot allocation schemes can be found in IALA A-124,
Appendix 14.
The parameters required for an FATDMA schedule are as follows.
Channel 1 start UTC
This is the hour and minute for transmission on channel 1. This specifies the AIS frame (minute) within a day
in which the start slot for channel 1 resides.
in which the start slot for channel 1 resides.
Channel 1 start slot
This is the slot number for the first transmission on channel 1. The slot number can range from -1 (transmission
disabled on this channel) to 2249. Note that each message #21 transmission occupies two slots and associated
base station slot reservations must therefore reserve two slots.
disabled on this channel) to 2249. Note that each message #21 transmission occupies two slots and associated
base station slot reservations must therefore reserve two slots.
Channel 1 interval
This is the interval in slots between transmissions on channel 1. The interval can range from 0 to 3240000 slots,
which equates to an interval of one day. Typically the interval is set to 13500 slots (6 minutes) on each channel
which results in an overall interval of 3 minutes.
which equates to an interval of one day. Typically the interval is set to 13500 slots (6 minutes) on each channel
which results in an overall interval of 3 minutes.
T1
T1+S
T3
T3+S
T3
T3+S
T1
T1+S
T3
T3+S