Method and system for communication in a hybrid satellite/terrestrial network

• US 10,396,961 B2
• Filed: 11/27/2015
• Issued: 08/27/2019
• Est. Priority Date: 11/28/2014
• Status: Active Grant

• Current Assignee: Thales SA
• Original Assignee: Thales SA
• Inventors: Gadat, Benjamin, Van Wambeke, Nicolas, Peyrotte, Christian
• Primary Examiner(s): Haile, Feben
• Application Number:
  US14/953,217
• Publication Number:
  US 20160156448A1
• Time in Patent Office: 1,369 Days
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04B 7/185 Space-based or airborne stations; Stations for satellite systemsH04B7/204 takes precedence
• CPC Class Codes: H04B 7/18508 with satellite system used as relay, i.e. aeronautical mobile satellite service
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861

Abstract

A method for transmitting data in a telecommunication network having a satellite component and a terrestrial component, the data being organized into a set of packets having an identifier, the telecommunication network comprising at least one bearer, at least one satellite and at least one terrestrial station, the method comprises the steps of: transmission of a data packet having an identifier from said satellite, reception of the data packet by the bearer, transmission of a data packet having an identifier in response to a transmitted negative acknowledgement message by the terrestrial station. A method for receiving data to be implemented on a bearer, a method for transmitting data to be implemented on a terrestrial station, and an associated data transmission system are also provided.

Claims

1. A method for transmitting data in a telecommunication network having a satellite component having at least one satellite to communicate through a satellite link, and a terrestrial component having at least one terrestrial station to communicate through a terrestrial link, said data being organized into a set of packets having an identifier, said telecommunication network comprising at least one bearer, said method comprising the steps, performed for each data packet, of:

transmission of a data packet having an identifier from said satellite through said satellite link,

reception of said data packet by the bearer, according to the steps of;

a) reception of said data packet transmitted by said satellite through the satellite link,

b) recovery of the identifier and verification of correct reception of said data packet,

c) in the event of incorrect reception of the data packet, transmission of a negative acknowledgement message comprising the identifier of the data packet to at least said terrestrial station through the terrestrial link, and

d) reception of a data packet corresponding to said identifier that is transmitted by the terrestrial station in response to the negative acknowledgement message through the terrestrial link,

processing said data packet by the terrestrial station, according to the steps of;

A) receiving the data packet from said satellite through the satellite link,

B) recovering the identifier and verifying the correct reception of the data packet,

C) in the event of correct reception of said data packet, memory storing the data packet and the identifier in a database,

D) when receiving a negative acknowledgement message transmitted by the bearer having a data packet identifier through the terrestrial link;

E) recovering the identifier transmitted in the negative acknowledgement message,

F) recovering, from the database, the data packet corresponding to the identifier, and

G) transmitting the data packet recovered from the database to said bearer through the terrestrial link so that said data packet is received by the bearer before the retransmission of the data packet made from the satellite.

2. The method according to claim 1, wherein a satellite gateway transmits the data packets to said satellite.

3. The method according to claim 1, wherein the data packets transmitted to the bearer further comprise an identifier for the transmitter.

4. A system for transmitting data to a bearer in a telecommunication network comprising a satellite component comprising at least one satellite to communicate through a satellite link, and a terrestrial component comprising at least one terrestrial station to communicate through a terrestrial link, said data being organized into a set of packets having an identifier, said telecommunication network comprising at least one said satellite, at least one said bearer and at least one said terrestrial station which are configured to implement the method according to claim 1.

5. The method according to claim 1, wherein the step, performed by the terrestrial station, of transmitting the negatively acknowledged message to the bearer is carried out a plurality of times.

6. The method according to claim 1, wherein the step, performed by the terrestrial station, of transmission of said negatively acknowledged message to the bearer is carried out using a more robust mode of transmission.

7. A method for transmitting data in a telecommunication network having a satellite component having at least one satellite to communicate through a satellite link, a terrestrial component having at least one terrestrial station to communicate through a terrestrial link, and a hybridization gateway forming a link between a satellite gateway associated with said satellite and said terrestrial station, said data being organized into a set of packets having an identifier, said telecommunication network further comprising at least one bearer, said method comprising the steps of:

transmission of a data packet having an identifier from said hybridization gateway to the satellite gateway and to the terrestrial station,

transmission of said data packet from said satellite gateway by means of the satellite through said satellite link,

reception of said data packet by the bearer, according to the steps of;

a) reception of said data packet transmitted by said satellite through the satellite link,

b) recovery of the identifier and verification of correct reception of said data packet,

c) in the event of incorrect reception of the data packet, transmission of a negative acknowledgement message comprising the identifier of the data packet to at least said terrestrial station through the terrestrial link, and

d) reception of a data packet corresponding to said identifier that is transmitted by the terrestrial station in response to the negative acknowledgement message through the terrestrial link,

processing of said data packet by the terrestrial station, according to the steps of;

A) receiving the data packet from the hybridization gateway,

B) recovering the identifier and verifying the correct reception of the data packet,

C) in the event of correct reception of said data packet, memory storing the data packet and of the identifier in a database,

D) when receiving a negative acknowledgement message transmitted by the bearer through the terrestrial link;

E) recovering the identifier transmitted in the negative acknowledgement message,

F) recovering, from the database, the data packet corresponding to the identifier, and

G) transmitting the data packet recovered from the database to said bearer through the terrestrial link so that said data packet is received by the bearer before the retransmission of the data packet made from the satellite.

8. The method according to claim 7, wherein the step, performed by the terrestrial station, of transmitting the negatively acknowledged message to the bearer is carried out a plurality of times.

9. The method according to claim 7, wherein the step, performed by the terrestrial station, of transmission of said negatively acknowledged message to the bearer is carried out using a more robust mode of transmission.

10. A system for transmitting data to a bearer in a telecommunication network comprising a satellite component comprising at least one satellite to communicate through a satellite link, a terrestrial component comprising at least one terrestrial station to communicate through a terrestrial link, and a hybridization gateway forming a link between a satellite gateway associated with said satellite and said terrestrial station, said data being organized into a set of packets having an identifier, said telecommunication network comprising at least one said satellite, at least one said bearer and at least one said terrestrial station which are configured to implement the method according to claim 7.