User's Manual

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)
Remote Sites - that hear ONLY the Base
Modem Address: Individual
100+ (each remote must have a
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots (2 x Base packet transmit slots) +
Largest Relay Pkt: Min Idle Slot
Remote Sites - that hear ONLY Repeater A
Modem Address: Individual
200+ (each remote must have a
unique address)
CSMA MAC Setup: Data Pkts: Min Idle Slots Base packet transmit slots +
Largest Relay Pkt: Min Idle Slot
Remote Sites - that hear Repeater B
Modem Address: Individual
300+ (each remote must have a
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)
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
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