Data transmission apparatus and method

• US 10,165,444 B2
• Filed: 09/08/2017
• Issued: 12/25/2018
• Est. Priority Date: 09/09/2016
• Status: Active Grant

• Current Assignee: Doosan Heavy Industries and Construction Company Limited
• Original Assignee: Doosan Heavy Industries Construction Co., Ltd.
• Inventors: Yang, Seong Yeol, Chae, Seung Min, Kang, Seung Yup, Lee, Hee Tae
• Primary Examiner(s): Tran, Mong-Thuy T
• Application Number:
  US15/699,238
• Publication Number:
  US 20180077574A1
• Time in Patent Office: 473 Days
• Field of Search: 455411
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 2209/601 Broadcast encryption
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/06 for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/062 for key distribution, e.g. centrally by trusted party cryptographic mechanisms or cryptographic arrangements for key distribution involving a central third party H04L9/0819
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04W 12/0433 Key management protocols
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

A data transmission method includes requesting, by a plurality of transceivers, an authentication to a main controller, transmitting an authentication acceptance signal and separate decoding keys from the main controller to the transceivers, transmitting an encoded data bundle from the main controller to the transceivers and extracting, by each of the transceivers, some of data in the at least one encoded data bundle using the decoding key.

Claims

1. A data transmission method, comprising:

transmitting an authentication request signal from a plurality of transceivers to a main controller;

receiving an authentication acceptance signal from the main controller in response to the authentication request signal, and respectively receiving decoding keys corresponding to each of the transceivers from the main controller, wherein the decoding keys are independent and each dedicated to each of the transceivers, and used to respectively decode corresponding data block for the respective transceivers;

transmitting at least one data bundle from the main controller to the transceivers, wherein the data bundle is formed by combing a plurality of data blocks and encoded to be transmitted to the transceivers in unit of the data bundle; and

extracting, by each of the transceivers, corresponding data block among the data blocks from the encoded data bundle, by decoding the data bundle using a corresponding decoding key dedicated to each of the transceivers.

2. The data transmission method of claim 1, wherein the plurality of data blocks are encoded by an encoding key to form the at least one encoded data bundle.

3. The data transmission method of claim 1, wherein the corresponding data block extracted from the data bundle is decoded by a decoding key which a specific transceiver of the transceiver receives.

4. The data transmission method of claim 1, wherein each of the decoding keys includes a key header that identifies a location of data for a corresponding transceiver in the data bundle.

5. The data transmission method of claim 1, further comprising

transmitting a changed decoding key from the main controller to a corresponding transceiver when the transmitted decoding key is changed.

6. The data transmission method of claim 5, further comprising

transmitting changed mapping information corresponding to the changed decoding key from the main controller to the corresponding transceiver.

7. The data transmission method of claim 1, wherein

the receiving of the decoding keys includes respectively receiving mapping information corresponding to each of the transceivers from the main controller, and

the transceivers determine a location of their own data in the data bundle using the received mapping information.

8. The data transmission method of claim 7, wherein each mapping information includes unique information, and the mapping information and the decoding key transmitted to the one transceiver correspond to each other.

9. The data transmission method of claim 1, further comprising

classifying the transceivers by group prior to transmitting the authentication request signal, wherein the transmitting of the at least one encoded data bundle includes transmitting different encoded data bundles from the main controller to each group of the transceivers.

10. The data transmission method of claim 9, wherein

the transmitting of the decoding keys includes transmitting separate group information for each of the transceivers from the main controller to the transceivers, and

the group information identifies a data bundle to be received by the transceivers in the at least one encoded data bundle.

11. The data transmission method of claim 10, wherein

the main controller transmits the plurality of grouped encoded data bundles to the transceivers, and

the transceivers select a data bundle among the plurality of encoded data bundles using the group information.

12. A data transmission method, comprising:

transmitting an authentication request signal from a plurality of transceivers to a main controller, wherein corresponding separate decoding keys are previously input to each of the transceivers, wherein the decoding keys are independent and each dedicated to each of the transceivers, and the decoding keys are used to respectively decode corresponding data block for the respective transceivers;

receiving an authentication acceptance signal from the main controller in response to the authentication request signal;

transmitting at least one data bundle from the main controller to the plurality of transceivers, wherein the data bundle is formed by combing a plurality of data blocks and encoded to be transmitted to the transceivers in unit of the data bundle; and

decoding, by each of the transceivers, corresponding data block among the data blocks encoded in in the data bundle using each corresponding decoding key of each of the transceivers.

13. The data transmission method of claim 12, wherein

each of the decoding keys includes a key header identifying a location of the transceiver'"'"'s data in the at least one encoded data bundle, and

each of the transceivers decodes only the corresponding data block among the data blocks encoded in the data bundle using the key header and the decoding key.

14. The data transmission method of claim 12, wherein

corresponding separate mapping information is previously input to each of the transceivers, and

each of the transceivers determines a location of its data in the at least one encoded data bundle using the mapping information and extracts data corresponding to the decoding key.

15. The data transmission method of claim 12, further comprising

transmitting a changed decoding key from the main controller to the corresponding transceiver if the previously input decoding key is changed.

16. The data transmission method of claim 15, further comprising

transmitting changed mapping information corresponding to the changed decoding key from the main controller to the corresponding transceiver.

17. The data transmission method of claim 12, further comprising

classifying the transceivers by group, wherein the transmitting of the data bundle includes transmitting different encoded data bundles from the main controller to each of the plurality of transceiver groups.

18. The data transmission method of claim 17, wherein

the transmitting of the authentication acceptance signal from the mam controller to the transceivers includes transmitting separate group information from the main controller to each of the transceiver groups, and

the transceiver groups select a data bundle among the different encoded data bundles using the group information.

19. The data transmission method of claim 12, wherein the transmitting of the data bundle is performed in a broadcast mode or a multicast mode.

20. The data transmission method of claim 12, wherein a plurality of data blocks are encoded by an encoding key to form the at least one encoded data bundle.