Enabling powerful GUIs in ISOBUS networks by transparent data compression

Improving ISO 11783 file transfers into mobile farm equipments using on-the-fly data compression

“…For the sake of simplicity, the operation scenario is restricted to the transmission of IOP benchmark files to a designated VT unit. Furthermore, taking into account that ISOBUS network initialization involving the transmission of large OP files may lead to critical bus utilization when the number of connected ECUs is increased (Iglesias et al, 2014), three ISO 11783 network configuration scenarios comprising one (N1), three (N3) and five (N5) connected ECUs were considered. In all these network configurations, the enhancement of all devices with the proposed ISOBUSComp data compression service was assumed.…”

“…To gain insight into the effectiveness and efficiency of DEFLATE data compression for general ISO 11783 files, an extension of the benchmark dataset used in Iglesias et al (2014) was prepared. A detailed description of this extended dataset, which includes three IOP (ISOBUS Object Pool) files, 4 three BIN (Binary) files and three XML (eXtensible Markup Language) files with sizes varying from 3 KB to 162 KB, is shown in Table 2.…”

“…Activity 3: The Compressor Dispatcher receives the compressed OP file from the Compressor Machine and builds an Object Pool Transfer Message with the following information: length and location of bytecodes, the bytecodes, and the compressed OP file. Note that ISO 11783 does not specify compression techniques at any layer, and thus, a reserved bit for future applications of the ISO 11783 frame (R bit) is used to signal the use of ISOBUSComp data compression services (Iglesias et al, 2014).…”

“…In recent work (Iglesias et al, 2014), it was shown how data compression methods can be used to alleviate bandwidth bottleneck problems of ISO 11783 networks at initialization time. It is observed, however, that in such proposal, the provision of static data compression services is required, i.e., receiving Electronic Control Units (ECUs) have to know in advance the specific data compression method used by transmitting ECUs.…”