Microhard Systems IP-921 Operating Manual page 82

6.0 Configuration
In a PMP system,
Retransmissions
minimum value required as,
e f f e c t i v e l y , t h e
throughput from Master to
Remotes is divided by 1 plus
the Retransmissions value.
ALL modems in a network
must have the SAME value
for Network Type.
© Microhard Systems Inc.
This register determines the maximum amount of times that a
packet will be retransmitted (in addition to the initial transmission),
noting the following specific behaviours in various network
topologies:
PMP: Master will retransmit each data packet the exact number of
times specified in the Retransmissions field; Remote will retransmit
only if necessary, and then only until a given packet is
set
acknowledged or the value of the Remote's Retransmissions field is
to the
reached (after which it will discard the packet if retransmission not
successful). *See also ‗PMP with ACK‖ described in the Network
d a t a
Type (below).
PTP: IP Series will retransmit to its counterpart only if necessary,
and to a maximum number of the value specified in its
Retransmissions field. Packet is discarded if retransmissions are
not successful.
Defines the type of RADIO network (see Section 5.0 for a detailed
description of network topologies).
In a point-to-multipoint (PMP) network, the Master broadcasts data
to all units, and all remote units send their data (ultimately) to the
Master.
A point-to-point (PTP) network involves a Master and a Slave (with
0 or more Repeaters between them).
Peer-to-Peer (P2P) supports communication (through the Master)
between 2 (typically remote) units.
In an Everyone-to-Everyone (E2E) network, all units communicate
with all other units, through the Master. Note that this mode is very
bandwidth-intensive.
CONFIDENTIAL
IP9xx Series
Retransmissions
Values
0-255
5
Network Type
continued...
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