Teledesign Systems Inc TS4000EH Manuel D’Utilisation
TS4000 Radio Modem User’s Manual
AirNet Packet Protocol
50
Configuration Parameter
Setting
Repeater B Site
Modem Address: Individual
3
CSMA MAC Setup: Data Pkts: Min Idle Slots
3
CSMA MAC Setup: Relay Pkts: Min Idle Slots
1
Store and Forward Repeater Operation: All Packets
Relay All
Repeater C Site
Modem Address: Individual
4
CSMA MAC Setup: Data Pkts: Min Idle Slots
3
CSMA MAC Setup: Relay Pkts: Min Idle Slots
2
Store and Forward Repeater Operation: All Packets
Relay Some
Store and Forward Repeater Operation: Addresses
Group Individual
1 1
(Base)
1
400 - 499 (Remote Sites
that hear Repeater C)
that hear Repeater C)
Remote Sites - that hear ONLY the Base
Modem Address: Individual
100+ (each remote must have a
unique address)
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots
(2 x Base packet transmit slots) +
Largest Relay Pkt: Min Idle Slot
Largest Relay Pkt: Min Idle Slot
Remote Sites - that hear ONLY Repeater A
Modem Address: Individual
200+ (each remote must have a
unique address)
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots
Base packet transmit slots +
Largest Relay Pkt: Min Idle Slot
Largest Relay Pkt: Min Idle Slot
Remote Sites - that hear Repeater B
Modem Address: Individual
300+ (each remote must have a
unique address)
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots
3
Remote Sites - that hear Repeater C
Modem Address: Individual
400+ (each remote must have a
unique address)
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots
3
Equations:
Base packet transmit slots = Packet Transmit Time / Slot Time
Packet Transmit Time = {9 * [Max Outbound Message Length (in bytes) + 14] * Overhead / Air
Packet Transmit Time = {9 * [Max Outbound Message Length (in bytes) + 14] * Overhead / Air
Rate (in kbps)} + Radio Tx Attack Time (in ms)
Overhead = 1 if Coding (FEC) is Unchecked
Overhead = 1.5 if Coding (FEC) is Checked
Slot Time = 1.5 * Radio Transmit Attack Time