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F-Traffic Config
Last updated: July 22, 2008
This section is only applicable to the lab application and to a test application with the required feature license.
F-Traffic Config
determines the forward transmission format (packets, slots, preamble) that the test set will be used to transmit the forward data packets (non-signaling message) when the following conditions are met:
When the
DRC Value Fixed Mode Attribute
is off, the AT requests the DRC value based on the current link conditions as in real system operation. For subtype 2 and subtype 3 physical layer subtype, there are multiple transmission formats per each requested DRC value (see the table below).
F-Traffic Config
setting determines which transmission format is used for each requested DRC value:
-
Canonical - canonical transmission format for the DRC value received
-
Short Packet 1 - largest short packet size (non-canonical) format for the DRC value received
-
Short Packet 2 - 2nd largest short packet size (non-canonical) format for the DRC value received
-
Short Packet 3 - 3rd largest short packet size (non-canonical) format for the DRC value received
If there are no short packet formats or less than three short packet formats for the DRC value, the settings collapse as shown in the table below. The highlighted row for each DRC Value is called the
canonical
transmission format. The canonical transmission format is defined as the transmission format with the largest packet size for the DRC Value. Additional transmission formats for the DRC Value are called
short packet
(or
non-canonical
) transmission formats.
Forward Traffic Packet Configurations
|
DRC Value |
Single-User Transmission Format
(physical layer packet size in bits, number of slots, preamble length in chips) |
F-Traffic Config |
|
Canonical
|
Short Packet 1
|
Short Packet 2
|
Short Packet 3
|
|
0x1 |
(128, 16, 1024) |
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X |
|
(256, 16, 1024) |
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|
X |
|
|
(512, 16, 1024) |
|
X |
|
|
|
(1024, 16, 1024) |
X |
|
|
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|
0x2 |
(128, 8, 512) |
|
|
|
X |
|
(256, 8, 512) |
|
|
X |
|
|
(512, 8, 512) |
|
X |
|
|
|
(1024, 8, 512) |
X |
|
|
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0x3 |
(128, 4, 256) |
|
|
|
X |
|
(256, 4, 256) |
|
|
X |
|
|
(512, 4, 256) |
|
X |
|
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|
(1024, 4, 256) |
X |
|
|
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|
0x4 |
(128, 2, 128) |
|
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X |
|
(256, 2, 128) |
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X |
|
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(512, 2, 128) |
|
X |
|
|
|
(1024, 2, 128) |
X |
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0x5 |
(512, 4, 128) |
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X |
X |
|
(1024, 4, 128) |
|
X |
|
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(2048, 4, 128) |
X |
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0x6 |
(128, 1, 64) |
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X |
|
(256, 1, 64) |
|
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X |
|
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(512, 1, 64) |
|
X |
|
|
|
(1024, 1, 64) |
X |
|
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0x7 |
(512, 2, 64) |
|
|
X |
X |
|
(1024, 2, 64) |
|
X |
|
|
|
(2048, 2, 64) |
X |
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0x8 |
(1024, 2, 64) |
|
X |
X |
X |
|
(3072, 2, 64) |
X |
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0x9 |
(512, 1, 64) |
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X |
X |
|
(1024, 1, 64) |
|
X |
|
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(2048, 1, 64) |
X |
|
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0xA |
(4096, 2, 64) |
X |
X |
X |
X |
|
0xB |
(1024, 1, 64) |
|
X |
X |
X |
|
(3072, 1, 64) |
X |
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0xC |
(4096, 1, 64) |
X |
X |
X |
X |
|
0xD |
(5120, 2, 64) |
X |
X |
X |
X |
|
0xE |
(5120, 1, 64) |
X |
X |
X |
X |
When the
DRC Value Fixed Mode Attribute
is set to on, the forward transmission format for subtype 2 and subtype 3 physical layer is determined by
F-Traffic Format
.
Operating Considerations
-
You should set the
F-Traffic Config
to
Canonical
if your AT does not support short packet transmission formats.
-
In some cases, changing the
F-Traffic Config
may result in an error message posted (see
Short Packet Enabled Threshold
for details).
-
Signaling messages are always sent in the canonical format. This is to avoid the Signaling Link Protocol (SLP) from having to make very small fragments for the signaling messages that would be required with some non-canonical formats and forced single encapsulation (required for Test Applications).
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