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Data Compression Using The Lz77 Algorithm - Funk-Electronic Piciorgros TMO-100 Manual

Integrated tetra modem / router / rtu

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Funk-Electronic Piciorgros GmbH

3.1.3

Data Compression using the LZ77 algorithm

The TMO-100 has data compression capability and all data records received over the

serial interface are compressed before sending as SDS. At the receiving station, the data

is decompressed before moving it out. Detailed information regarding the LZ77 can be

found at:

http://de.wikipedia.org/wiki/LZ77

Data compression can improve performance when large data blocks are involved, by

reducing the data that is conveyed over the TETRA network, even if additional SDS

blocks are created (in cases where the original data block does not fit within an SDS).

If using the TMO-100 in conjunction with TRM-, RTU-, or MDP-Type Tetra units,

(these ones do not have the compression feature) compression can be disabled.

Enabling the Data Compression feature

V1.821 - Page 38 of 83

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