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Iridium Communications, Inc.
Iridium 9523 Product Developers' Guide
Revision 2.6
Note: This command does not support command concatenation.
5.7.80 +WIRLP - Iridium Radio Link Protocol
Set Command: +WIRLP=[<ver>[,<k1>[,<k2>[,< t1>[,<n2>[,<t2>[,<r1>[,<r2>[,<t4>[,<mode>]]]]]]]]]]
Set desired IRLP parameters to be negotiated with the peer at the start of the next data call. Note that
these desired parameters are reset to hardcoded defaults at the end of a data call, so this command
should be issued while a call is not in progress.
<ver> specifies the desired IRLP version and can take the following values:
0
Default IRLP version (N0)
<k1>
represents the maximum number of sequentially numbered I frames that may be
outstanding at any given time at downlink direction (IWF->Iridium 9523) and can take the
following values:
1-105. Default is 105.
<k2>
represents the maximum number of sequentially numbered I frames that may be
outstanding at any given time at uplink direction (Iridium 9523->IWF) and can take the
following values:
1-105. Default is 105.
<t1>
is used to supervise the acknowledgment of transmitted unnumbered frames. The values
are defined to be the earliest instant to enter the recovery procedure and can take on the
following values:
27-255 (in 50-ms unit). Default is 30.
<n2>
is used to represent the maximum number of re-transmission attempts of a frame (e.g.
I,S,N,U frame) and can take on the following values:
1-255. Default is 15.
<t2 >
is used to indicate the amount of time available within which the acknowledging frame
must be transmitted and can take on the following values:
1-255 (in 10-ms unit). Default is 10.
<r1>
is used to represent the maximum number of S frames that are used to acknowledge I
frames at downlink direction (IWF->Iridium 9523) and can take on the following values:
1-10. Default is 10.
<r2 >
is used to represent the maximum number of S frames that are used to acknowledge I
frames at uplink direction (Iridium 9523->IWF) and can take on the following values:
1-10. Default is 10.
<t4 >
is used to supervise the re-sequencing of misordered frames. The values are defined to
be the earliest instant to consider a tardy frame as lost. It can take on the following
values:
20-255 (in 10-ms unit). Default is 25.
<mode> is used to indicate the mode of operation and can take on the following values:
0
1
NOTE: For the proper operation of the IRLP procedures, t2 should be less than t1 and 2*t4 should be less
than t1.
Iridium Communications, Inc.
Proprietary & Confidential Information
Only
unacknowledged mode of operation
acknowledged mode of operation (default)
Page 65 of 115
Information Contained in this Guide
is Subject to Change Without Notice
Distribution of Guide Restricted
to Product Developers
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