Forum: Janus general discussion forum

Please generate a EMCON-forum


posts: 10 user offline
EMission-CONtrol is an important topic in the hydro acoustical world to share the medium. The LOMBARD effect increase the "ambient" noise level. To overcome this, a "keep silent!" parcel could help. To explore it, I would like kindly asking for a forum and an User Application Class.

„keep silent!“ message

Bit Length Description Setting Remark

1-4 4 Version Number 0011 Unsigned 4 bit integer Version 3 (STANAG)
5 1 Mobility Flag
6 1 Schedule Flag = 1 (additional CARGO follows in form of silence)
7 1 Tx/Rx Flag 0:only Tx / 1:Tx and Rx
8 1 Forward capability = 0 (No)
9-16 8 EMCON, number given by CMRE based on Table UserApplicationClassesTable
17-22 6 „keep silent!“ (0)
23 1 Beacon Flag = 0 (time reserved for this EMCON request for silence)
24-30 7 Time index for the TimeAllocationReservedInterval
31-36 6 OccupyBandLowerFrequency (6 bit) (0..31 kHz, 500 Hz resolution)
37-42 6 OccupyBandwidth (6 bit) (0..31 kHz, 500 Hz resolution)
43-50 8 Reduce the SL with 0..255 dB
51-54 4 Threshold 0..15 dB
55 1 single request 0:No / 1:Yes
56 1 own activity 0:passive / 1:active transmissions
57-64 8 CRC-8 ATM SMBus checksum poly = x8 + x2 + x1 + x0, init = 0

Thanks; it is also possible to shift this message into a testing sandbox
User Application Class.

BR
Ivor

https://www.researchgate.net/publication/269873977_EMCON-Ansatz_fur_die_mobile_Unterwasserkommunikation(external link)


posts: 1 user offline
Dear Ivor,

Thanks for your proposal, I think it would be very valuable to discuss this at the JANUS Workshop (20-21 November, 2019) to get feedback from participants. What do you think? Would you be able to present this at the Workshop?

Regards, Roberto


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