TSAT 3000 - Telemetry and data transfer via SATellite
TSAT 3000 Configuration Parameter Description, January 2013 Page 62 of 124
3.9.4 MAC_SLOT_MAP_{0 | 1 | 2 | 3}
MAP 0: Default 3, Range 0…7 – Array of Bytes
MAP 1: Default 5, Range 0…7 – Array of Bytes
MAP 2: Default 3, Range 0…7 – Array of Bytes
MAP 3: Default 5, Range 0…7 – Array of Bytes
HUB Ver <= 30.4.0: Not Used.
HUB Ver >= 30.5.0:
MAC_SLOT_MAP_0 may be used by the “Slot Request and Resevation (SRR) Facility” as
described by
MAC_SLOT_REQ_RSV (when SRR_FIXED is enabled).
RT: Set the Access-Schemes that can be used on Inbound carrier. The RT has 4 Access-
Schemes. The HUB will select which of them to be used. This information is signalled from
HUB to RTs in all
SYNC packets. When NMS is connected, it will tell HUB which Access-
Scheme to be used. Normally, the following assignments are selected by NMS – See also
MAC_ACCESS_SCHEME.
MAP Description
MAP_0 Used for all kind of traffic.
MAP_1
Used when Inbound load is above
defined limit, and the Maximum Inbound Load
option in NMS ‘Network Behaviour’ window is enabled.
MAP_2
MAP_3
Not Used – In the future they may be used in Multi-Inbound-Link (MIL) networks.
Each Access-Scheme is an array of 1 …
MAC_TIMESLOTS_IN_FRAME bytes, where each
element represents the granted access to the corresponding Inbound slot. Following legal
values are:
Value Description Comments
0 RT cannot send in this slot NOT allowed
1
Packets with priority >= 0 may be sent in this slot
ALL allowed
2
Packets with priority >= 1 may be sent in this slot ALL, except priority 0
3
Packets with priority >= 2 may be sent in this slot
4
Packets with priority >= 3 may be sent in this slot
5
Packets with priority >= 4 may be sent in this slot
6
Packets with priority >= 5 may be sent in this slot
7
Packets with priority >= 6 may be sent in this slot Both priority 6 and 7
Packets are assigned the appropriate priority when they are received from a PORT.
See
PORT_PRIORITY [n] and LCC_MANAGEMENT_PRIORITY.
See also description of slot reservation, next page.
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