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Chapter 4 - Operation and Administration
Fix: The permutation base is defined by the DL Permutation Base Value
parameter (see below).
Variable: The formula is (4*Cell number + Segment number) modulo 32.
Rotated: The formula starts with (4*Cell number + Segment number) modulo
32 (the same as for Variable), incremented by 1 (modulo 32) each frame.
The default is Fix.
In the current release only the Fix option is supported.
4.8.2.2.5.2
DL Permutation Base Value
The value of the downlink permutation base for Fix DL Permutation Base.
The range is from 0 to 31.
The default is 0.
4.8.2.2.5.3
UL Permutation Base
The method for configuring/calculating the permutation base used for uplink
sub-channelization.
The available options are Fix, Variable and Rotated.
Fix: The permutation base is defined by the UL Permutation Base Value
parameter (see below).
Variable: The permutation base depends on the calculated Preamble Index as
follows:
Calculated Preamble Index
0-69
70-95
96-111
112-113
Rotated: Starts with the same value as calculated for Variable, incremented by
1 (modulo 70) each frame.
The default is Fix.
BreezeMAX Extreme
Table 4-27: Variable UL Permutation Base Calculation
UL Permutation Base
= Preamble Index
= Preamble Index-70
= Preamble Index-42
= Preamble Index-112
198
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