US 12,014,643 B2
Method and system for communicating unicast/multicast messages using automatic dependent surveillance-broadcast (ADS-B) protocol
Iryna Borshchova, Ottawa (CA); and Siu O'Young, St. John's (CA)
Assigned to SEAMATICA AEROSPACE LTD., St. Johns (CA)
Filed by SEAMATICA AEROSPACE LTD., St. John's (CA)
Filed on Apr. 12, 2021, as Appl. No. 17/228,578.
Application 17/228,578 is a continuation in part of application No. 16/396,956, filed on Apr. 29, 2019, granted, now 10,977,954.
Claims priority of provisional application 62/663,512, filed on Apr. 27, 2018.
Prior Publication US 2021/0233417 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 12/28 (2006.01); G08G 5/00 (2006.01); H04L 9/08 (2006.01); H04L 9/30 (2006.01); H04L 69/324 (2022.01); G08G 5/04 (2006.01)
CPC G08G 5/0095 (2013.01) [G08G 5/0013 (2013.01); G08G 5/0082 (2013.01); H04L 9/0825 (2013.01); H04L 9/30 (2013.01); H04L 69/324 (2013.01); G08G 5/0056 (2013.01); G08G 5/0069 (2013.01); G08G 5/04 (2013.01); H04L 2209/84 (2013.01)] 32 Claims
OG exemplary drawing
 
1. A method for unicast or multicast transmission via an Automatic Dependent Surveillance-Broadcast (ADS-B) transmission protocol, the method comprising:
generating a message to be carried on an ADS-B Universal Access Transceiver (UAT) frame for transmission from a first entity to a second entity;
encrypting the message with a unique set of keys associated with the first entity and the second entity to generate an encrypted message;
generating a header indicating an ADS-B frame type;
generating an identifier for uniquely identifying the second entity, the identifier being known to the first and second entities; and
forming an ADS-B UAT frame comprising a header portion, and a payload portion comprising a sub-header, comprising:
inserting the header into the header portion;
inserting the encrypted message and the identifier into the payload portion; and
limiting a frame size not to exceed a length of a standard ADS-B UAT frame of 34 bytes as specified in standard specifications;
thereby making the ABS-B UAT frame compatible with a standard ADS-B UAT frame; and
transmitting the ADS-B UAT frame to the second entity, thereby converting the ADS-Broadcast transmission protocol into a unicast or multicast transmission.