Apparatus and method for communicating with satellite based on analog network coding

• US 9,859,971 B2
• Filed: 06/05/2014
• Issued: 01/02/2018
• Est. Priority Date: 12/08/2011
• Status: Active Grant

• Current Assignee: Ajou University Industry
• Original Assignee: Ajou University Industry
• Inventors: Lim, Jae Sung, Kim, Jung Bin, Noh, Hong Jun
• Primary Examiner(s): Yang, James
• Application Number:
  US14/297,258
• Publication Number:
  US 20140287679A1
• Time in Patent Office: 1,307 Days
• CPC Class Codes: H04B 7/15528 Control of operation parameters of a relay station to exploit the physical medium
• CPC Class Codes: H04B 7/18502 Airborne stations
• CPC Class Codes: H04B 7/18513 Transmission in a satellite or space-based system
• CPC Class Codes: H04B 7/18517 Transmission equipment in earth stations
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0435 wherein the sending and receiving network entities apply symmetric encryption, i.e. same key used for encryption and decryption cryptographic mechanisms or cryptographic arrangements for symmetric key encryption H04L9/06
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 9/0819 Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) network architectures or network communication protocols for key distribution in a packet data network H04L63/062
• CPC Class Codes: H04L 9/0872 using geo-location information, e.g. location data, time, relative position or proximity to other entities
• CPC Class Codes: H04L 9/12 Transmitting and receiving encryption devices synchronised or initially set up in a particular manner

Abstract

Disclosed are an apparatus and method for communicating with satellite based on analog network coding. A method for satellite communication, according to one embodiment of the present invention, is a method for satellite communication of a satellite terminal and comprises the steps of: receiving transmission data from a feeder that directly transmits the transmission data to a satellite; receiving a superposed signal, in which the transmission data and reception data corresponding to the transmission data have been analog network coded, from the satellite; and extracting the reception data from the superposed signal using the superposed signal and the received transmission data.

Claims

1. A satellite communication method of a plurality of satellite terminals in a first network, comprising:

receiving transmission data from a first feeder in the first network that directly transmits the transmission data to a satellite;

receiving a superposed signal, in which the transmission data and reception data corresponding to the transmission data have been analog network coded, from the satellite, wherein the reception data is directly transmitted to the satellite by a second feeder in a second network; and

extracting the reception data from the superposed signal using the superposed signal and the received transmission data,

wherein the extracting of the reception data includes extracting the reception data from the superposed signal using;

first channel information between the first feeder and the satellite, second channel information between each of the plurality of the satellite terminals and the satellite, the superposed signal, and the transmission data;

environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

service attribute information including security level information of the satellite terminal in the satellite network.

2. The satellite communication method of claim 1, wherein the receiving the transmission data from the first feeder comprises;

receiving transmission data encoded from the first feeder;

extracting the transmission data by decoding the encoded transmission data; and

storing the extracted transmission data.

3. The satellite communication method of claim 1, wherein the receiving the transmission data from the first feeder comprises receiving the transmission data from the first feeder over a preset heterogeneous network that is connected to the first feeder via a wired/wireless connection.

4. A satellite communication apparatus in a first network, comprising:

a first receiver configured to receive transmission data from a first feeder in the first network that directly transmits the transmission data to a satellite;

a second receive configured to receive a superposed signal, in which the transmission data and reception data corresponding to the transmission data have been analog network coded, from the satellite, wherein the reception data is directly transmitted to the satellite by a second feeder in a second network; and

a signal processor configured to extract the reception data from the superposed signal using;

first channel information between the first feeder and the satellite, second channel information between the satellite communication apparatus and the satellite, the superposed signal, and the received transmission data,

environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

service attribute information including security level information of the satellite terminal in the satellite network.

5. The satellite communication apparatus of claim 4, wherein the first receive is further configured tot:

receive the transmission data encoded by the first feeder; and

extract the transmission data by decoding the encoded transmission data,

wherein the first receiver comprises a storage unit configured to store the extracted transmission data.

6. A satellite communication method of a satellite terminal, comprising:

receiving a security key from a security station within a satellite network;

sharing the security key with the security station;

receiving a superposed signal, in which transmission data transmitted from a base station or a first satellite terminal within the satellite network via an uplink and the security key transmitted from the security station via an uplink have been analog network coded, from a satellite; and

extracting reception data corresponding to the transmission data from the superposed signal using the shared security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.

7. The satellite communication method of claim 6, further comprising sharing information about a time at which the security station transmits the security key via the uplink, or synchronization information.

8. A satellite communication method of a satellite terminal, comprising:

generating a security key;

transmitting the security key via an uplink of a satellite network in synchronization with a time at which transmission data is transmitted from a base station or a first satellite terminal within the satellite network via the uplink;

receiving a superposed signal, in which the transmission data and the security key have been analog network coded, from a satellite via a downlink of the satellite network; and

extracting reception data corresponding to the transmission data from the superposed signal using the security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.

9. A satellite communication method of a satellite terminal, comprising:

receiving a superposed signal, in which transmission data transmitted from a base station or a first satellite terminal within a satellite network via an uplink and a security key transmitted from a security station within the satellite network via an uplink have been analog network coded, from a satellite;

generating a security key identical to the security key transmitted by the security station in a process independent of that of the security station; and

extracting reception data corresponding to the transmission data from the superposed signal using the generated security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.

10. A satellite communication apparatus, comprising:

a security key storage unit configured to;

receive a security key from a security station within a satellite network, and

store the security key shared with the security station;

a superposed signal receiver configured to receive a superposed signal, in which transmission data transmitted from a base station or a first satellite terminal within the satellite network via an uplink and the security key transmitted from the security station via an uplink have been analog network coded, from a satellite via a downlink; and

a signal processor configured to extract reception data corresponding to the transmission data from the superposed signal using the stored security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.

11. A satellite communication apparatus, comprising:

a security key storage unit configured to;

generate a security key, and

store the generated security key;

a transmission unit configured to transmit the security key via the uplink in synchronization with a time at which transmission data is transmitted from a base station or a first satellite terminal within the satellite network via an uplink of the satellite network;

a superposed signal receiver configured to receive a superposed signal, in which the transmission data and the security key have been analog network coded, from a satellite via a downlink of the satellite network; and

a signal processor configured to extract reception data corresponding to the transmission data from the superposed signal using the stored security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.

12. A satellite communication apparatus, comprising:

a superposed signal receiver configured to receive a superposed signal, in which transmission data transmitted from a base station or a first satellite terminal within a satellite network via an uplink and a security key transmitted from a security station with the satellite network via an uplink have been analog network coded, from a satellite;

a security key storage unit configured to generate and store a security key identical to the security key transmitted by the security station in a process independent of that of the security station; and

a signal processor configured to extract reception data corresponding to the transmission data from the superposed signal using the stored security key,

wherein the security key is generated based on environmental attribute information and service attribute information of the satellite terminal in a differentiated, hierarchical, or selective manner, wherein;

the environmental attribute information including location information, hierarchical rank information of the satellite terminal within the satellite network, and a group information of the satellite terminal within the satellite network, and

the service attribute information including security level information of the satellite terminal in the satellite network.