Enhanced data link communication over iridium
First Claim
1. A method to reduce latency in a data link communication, the method comprising:
- compressing a first data packet to be uplinked from a ground station to an aircraft-data-link device in an aircraft, the aircraft-data-link device configured to receive packets having a packet size less than or equal to a first threshold packet size;
determining a packet size of the compressed first data packet;
when the packet size exceeds a second threshold packet size, transmitting the compressed first data packet over an uplink via a SATCOM communication link over a circuit switched data service that keeps a first connection open between the ground station and a transceiver onboard the aircraft, until the last bit of data for a session between the ground station and the aircraft-data-link device is sent, to transfer the compressed first data packet having the packet size exceeding the second threshold packet size, wherein a circuit is defined for the first connection before the first connection is made; and
when the packet size is less than or equal to the second threshold packet size, transmitting the compressed first data packet over the uplink via the SATCOM communication link via a packet switched data service that keeps a second connection between the ground station and the transceiver open long enough to send only the compressed first data packet having the packet size less than or equal to the second threshold packet size and then closes the second connection.
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Accused Products
Abstract
A method to reduce latency in a data link communication is provided. The method includes compressing a data packet to be uplinked from a ground station to an aircraft communications addressing and reporting system (ACARS) in an aircraft and determining a packet size of the data packet. The aircraft communications addressing and reporting system is configured to receive packets having a packet size less than or equal to a first threshold packet size. An Iridium router based unrestricted digital inter-working connectivity solution data service is implemented to uplink the compressed data packet if the packet size exceeds a second threshold packet size. A short burst data service is implemented to uplink the compressed data packet if the packet size is less than or equal to the second threshold packet size.
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Citations
18 Claims
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1. A method to reduce latency in a data link communication, the method comprising:
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compressing a first data packet to be uplinked from a ground station to an aircraft-data-link device in an aircraft, the aircraft-data-link device configured to receive packets having a packet size less than or equal to a first threshold packet size; determining a packet size of the compressed first data packet; when the packet size exceeds a second threshold packet size, transmitting the compressed first data packet over an uplink via a SATCOM communication link over a circuit switched data service that keeps a first connection open between the ground station and a transceiver onboard the aircraft, until the last bit of data for a session between the ground station and the aircraft-data-link device is sent, to transfer the compressed first data packet having the packet size exceeding the second threshold packet size, wherein a circuit is defined for the first connection before the first connection is made; and when the packet size is less than or equal to the second threshold packet size, transmitting the compressed first data packet over the uplink via the SATCOM communication link via a packet switched data service that keeps a second connection between the ground station and the transceiver open long enough to send only the compressed first data packet having the packet size less than or equal to the second threshold packet size and then closes the second connection. - View Dependent Claims (2, 3, 4)
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5. A system to enhance data link communication, the system comprising:
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an aircraft-data-link device onboard an aircraft, the aircraft-data-link device configured to receive data packets having a packet size less than or equal to a first threshold packet size; a transceiver onboard the aircraft, the transceiver communicatively coupled to the aircraft-data-link device, wherein, when a packet size of a first data packet to be uplinked from a ground station to the aircraft-data-link device is determined, at the ground station, to be greater than a second threshold packet size, the transceiver is configured to transmit and receive the first data packet via a SATCOM communication link over a circuit switched data service, wherein, when the packet size of the first data packet to be uplinked from the ground station to the aircraft-data-link device is determined, at the ground station, to be less than or equal to the second threshold packet size, the transceiver is configured to transmit and receive via the SATCOM communication link via a packet switched data service, wherein the circuit switched service keeps a first connection open between the ground station and the transceiver, until the last bit of data for a session between the ground station and the aircraft-data-link device is sent, to transfer the first data packet having a packet size exceeding a second threshold packet size, wherein a circuit is defined for the first connection before the first connection is made, and wherein the packet switched data service keeps a second connection between the ground station and the transceiver open long enough to send only the first data packet having a packet size less than or equal to the second threshold packet size and then closes the second connection, the transceiver including a processor to execute software to; decompress the uplinked first data packet; and if the decompressed uplinked first data packet has a packet size greater than the first threshold packet size, multi-block the decompressed uplinked first data packet into a plurality of blocks, each block being less than the first threshold packet size, wherein the transceiver sequentially sends the plurality of blocks to the aircraft-data-link device. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method to reduce latency in a data link communication, the method comprising:
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receiving a first data packet over an uplink via a SATCOM communication link over a circuit switched data service when a packet size of the first data packet to be uplinked from a ground station to an aircraft-data-link device in an aircraft is determined, at the ground station, to be greater than an uplink threshold packet size, wherein the circuit switched data service keeps a first connection open between the ground station and a transceiver onboard the aircraft, until the last bit of data for a session between the ground station and the aircraft-data-link device is sent, to transfer the first data packet having a packet size greater than the uplink threshold packet size, wherein a circuit is defined for the first connection before the first connection is made, and wherein the aircraft-data-link device is configured to receive data packets having a packet size less than or equal to a first threshold packet size; and receiving the first data packet over the uplink via the SATCOM communication link via a packet switched data service when the packet size of the first data packet to be uplinked from the ground station to the aircraft-data-link device in the aircraft is determined at the ground station to be less than or equal to the uplink threshold packet size, wherein the packet switched data service keeps a second connection open long enough to send only the first data packet having a packet size less than or equal to the uplink threshold packet size and then closes the second connection. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification