词条 | Draft:IALA and Patentable subject matters |
释义 |
Introduction[https://www.iala-aism.org IALA] is a non profit, international technical association[1]. Established in 1957, it gathers together marine aids to navigation authorities, manufacturers, consultants, and, scientific and training institutes from all parts of the world and offers them the opportunity to exchange and compare their experiences and achievements. IALA encourages its members to work together in a common effort to harmonize aids to navigation world-wide and to ensure that movements of vessels are safe, expeditious and cost effective, while ensuring sustainability and the protection of the environment. IALA develops Standards, Recommendations, Guidelines, Manuals and other guidance, i.e. “IALA Documents”, through expert discussions in its technical committees. IALA Documents should be kept free of matters which could infringe essential patents or patent applications, unless a free Patent License or a Patent License on reasonable terms is awailable. It is preferred not to apply for (patent) protection of new patentable matters arising from discussions within IALA technical committees. Instead it prefered to make such matters available in the public domain, in order to prevent anyone from patenting these, since this could obstruct the effective world-wide useage and implementation of the contents of IALA Documents. One means of publishing said subject matters, is for IALA members to place them here on Wikipedia, as subsections of this article. Enhanced RADAR positioningFirst published 4. March 2011. Details can be found in another article titled Enhanced RADAR positioning. VDES (VHF Data Exchange)First published in 2015 by ITU-R M.2092-0[2]. VDES DetailsThe next chapters describe patentable aspects of VDES implementational aspects in detail. This publishing has the purpose to protect these ideas and therefore make them permanently safely usable for all entities that wish to implement VDES equipment. Improving Reception under bad conditionsIt is seen to give advantage in receivers to:
A clever system might even:
However:
Therefore, it might be advisable always to handle retransmissions as such:
(published the 4th of April, 2019, by IALA ENAV Workinggroup 3 Chairman Stefan Pielmeier) VDE SAT Vehicle receiver puncturingWhen there are strong transmissions from earth interfering with the VDE Satellite, or any SDR based receiver for that sake, it is seen that just changing all samples (@ different sampling rates, e.g. *4) over a certain threshold (like e.g. -80 dBm) to 0 (- infinite dBm) on the digital receiver side can significantly improve reception of a otherwise totally blocked receiver. Measurements presented to IALA show that this works e.g. to block out extremely strong transmissions from ground seen in the nordic eastern region in VHF band. While being blocked by strong, but pulsed transmissions from supposedly ground to space radar, the satellite was still able to receive the weak ground signal from a ship VHF station after "zero-puncturing" out the too high samples. (published the 4th of April, 2019, by IALA ENAV Workinggroup 3 Chairman Stefan Pielmeier) ArchitectureThe VDES components embed in the shore and ship infrastructure according to the maritime connectivity platform MCP[3]. Following compenents are part of a complete end to end VDES system:
The VDES connection can handle multiple service client flows (context) through only one MMSI of the ship and the base station by use of a temporary ID used to identify the flow/context. This ID can be a Port address or similar, assigned by the VDES gateway for outgoing traffic towards the MMS and the service provider. It will follow the data through the VDES connection to make each data block identifiable for the VDES terminal in order to know where to route the data, dependent on if the VDES terminal itself terminates the service or if it just forwards the messages by e.g. 61162-450 (Light Weight Ethernet) connection to the service client inside another bridge device (i.e. ECDIS). The trust model of the MCP helps very efficiently to secure that no unsolicited traffic will reach the VDES network or the ship station; that makes the great difference between any internet service and the maritime dedicated VDES service, where the gateway securely only transports service data that comes from a trusted source and was transported in a secured channel (SSL/TLS protected) from the trusted service provider to the trusted gateway, using URLs that come from the trusted MMS. (published the 4th of April, 2019, by IALA ENAV Workinggroup 3 Chairman Stefan Pielmeier) References1. ^https://www.iala-aism.org/about-iala/ 2. ^{{cite web |title=ITU-R M.2092 |url=https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.2092-0-201510-I!!PDF-E.pdf}} 3. ^{{cite web |title=The Maritime Connectivity Platform |url=https://maritimeconnectivity.net}} |
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