Managing doppler and framing impacts in networks

A method comprising:

• receiving, at data processing hardware of a fixed node, a current velocity of a mobile node and a current position of the mobile node relative to the fixed node, the mobile node moving toward or away from the fixed node;
• identifying, by the data processing hardware, a receive time slot for the mobile node to receive a transmission of a data packet from the fixed node;
• determining, by the data processing hardware, a propagation delay for the data packet between the fixed node and the mobile node based on the current position of the mobile node relative to the fixed node;
• determining, by the data processing hardware, a reception time based on the identified receive time slot and the determined propagation delay;
• determining, by the data processing hardware, a Doppler shift based on the current velocity of the mobile node;
• determining, by the data processing hardware, a reception frequency based on the determined Doppler shift by adding the Doppler shift to a base reception frequency or subtracting the Doppler shift from the base reception frequency;
• determining, by the data processing hardware, a clock rate correction, the clock rate correction accounting for a change in the propagation delay during transmission of the data packet;
• and
• transmitting, by the data processing hardware, the data packet to the mobile node at the determined reception time using the determined reception frequency compensated by the determined clock rate correction.

A system comprising:

• data processing hardware of a mobile node;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• receiving a current velocity of the mobile node and a current position of the mobile node relative to a fixed node, the mobile node moving toward or away from the fixed node;
• identifying a receive time slot for the fixed node to receive a transmission of a data packet from the mobile node;
• determining a propagation delay for the data packet between the mobile node and the fixed node based on the current position of the mobile node relative to the fixed node;
• determining a transmission time based on the identified receive time slot and the determined propagation delay;
• determining a Doppler shift based on the current velocity of the mobile node;
• determining a transmission frequency based on the determined Doppler shift by adding the Doppler shift to a base transmission frequency or subtracting the Doppler shift from the base transmission frequency;
• determining a clock rate correction, the clock rate correction accounting for a change in the propagation delay during transmission of the data packet;
• and
• transmitting the data packet to the fixed node at the determined transmission time using the determined transmission frequency compensated by the determined clock rate correction.

A system comprising:

• data processing hardware of a fixed node;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• receiving a current velocity of a mobile node and a current position of the mobile node relative to the fixed node, the mobile node moving toward or away from the fixed node;
• identifying a receive time slot for the mobile node to receive a transmission of a data packet from the fixed node;
• determining a propagation delay for the data packet between the fixed node and the mobile node based on the current position of the mobile node relative to the fixed node;
• determining a reception time based on the identified receive time slot and the determined propagation delay;
• determining a Doppler shift based on the current velocity of the mobile node;
• determining a reception frequency based on the determined Doppler shift by adding the Doppler shift to a base reception frequency or subtracting the Doppler shift from the base reception frequency;
• determining a clock rate correction, the clock rate correction accounting for a change in the propagation delay during transmission of the data packet;
• and
• transmitting the data packet to the mobile node at the determined reception time using the determined reception frequency compensated by the determined clock rate correction.