# US 2023/0412255 A1 · Method for the compression of data collected by a leo satellite from a plurality of iot devices and the transmission to a base station and associated system

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- Number: US 2023/0412255 A1
- Document ID: US20230412255A1
- Status: Published application
- Kind: A1
- Application number: 18/248,140
- Filed: 2020-10-07
- Published: 2023-12-21
- Earliest claimed: 2020-10-07
- Assignees: Eutelsat SA
- Applicants: Eutelsat SA
- Inventors: François TRIQUET; Matthieu THIEBAUT; Julien BLANCHER
- Web page: https://patentgrep.com/patent/US20230412255A1

## CPC

- H04B 7/18519: {Operations control, administration or maintenance}
- H04B 7/18515: {Transmission equipment in satellites or space-based relays}
- H04B 7/195: Non-synchronous stations
- H04L 69/04: Protocols for data compression, e.g. ROHC
- H04W 28/06: Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)}
- H04B: TRANSMISSION
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)

## Abstract

A compression method for the storing and transmission of a plurality of pieces of data by a non-geostationary satellite to a ground-based station, the compression method including encoding the pieces of data in a predefined frame format, the encoding including creating a frame including at least one global header including at least one parameter field, the parameter field including a reference value of a parameter, upon receiving at least one piece of data of the plurality of pieces of data, adding at least one data packet to the frame, the data packet including: a packet header including at least one delta parameter field, the delta parameter field including the difference value between the value of the parameter for the received piece of data and the reference value of the parameter of the global header, a data payload including at least part of the received piece of data.

## Claims

### Claim 1

A compression method for storing and transmission of a plurality of pieces of data by a non-geostationary satellite to a ground-based station, the compression method comprising encoding the pieces of data in a predefined frame format, the encoding comprising:
creating a frame comprising at least one global header comprising at least one parameter field, the parameter field comprising a reference value of a parameter,
upon receiving at least one piece of data of the plurality of pieces of data, adding at least one data packet to the frame, the data packet comprising:
a packet header comprising at least one delta parameter field, the delta parameter field comprising a difference value between the value of the parameter for the received piece of data and the reference value of the parameter of the global header,
a data payload comprising at least part of the received piece of data.

### Claim 2 (depends on 1)

The compression method according to claim 1, wherein the parameter is a frequency, a timestamp, a RSSI or an SNR.

### Claim 3 (depends on 1)

The compression method according to claim 1, wherein the frame is a binary frame.

### Claim 4 (depends on 1)

The compression method according to claim 1, further comprising transmitting, to the ground-based station, the frame.

### Claim 5 (depends on 1)

The compression method according to claim 1, wherein the frame format comprises a size parameter, the size parameter comprising a maximum size for the data payload of the data packet, and wherein, upon receiving the at least one piece of data, the method first comprises a sub-step of fragmenting the received piece of data into a plurality of data payloads as a function of the size parameter and a plurality of data packets are added to the frame.

### Claim 6 (depends on 1)

The compression method according to claim 1, wherein steps of the method are carried out for each change of the reference value of the parameter of the global header.

### Claim 7 (depends on 1)

A non-geostationary satellite configured to carry out the method according to claim 1.

### Claim 8 (depends on 7)

The non-geostationary satellite according to claim 7, wherein the non-geostationary satellite is a low Earth orbit satellite.

### Claim 9 (depends on 7)

A communication system comprising at least one non-geostationary satellite according to claim 7 and at least one ground-based station.

### Claim 10 (depends on 9)

The communication system according to claim 9, further comprising a ground-based device.

### Claim 11

(canceled)

### Claim 12 (depends on 1)

A non-transitory computer-readable medium comprising instructions which, when executed by a computer, cause the computer to carry out the method according to claim 1.