# US 2014/0196097 A1 · Method and system for synchronization for dvb-s2 frame and its associated frame structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0196097 A1 - Document ID: US20140196097A1 - Status: Published application - Kind: A1 - Application number: 14/139,578 - Filed: 2013-12-23 - Published: 2014-07-10 - Earliest claimed: 2012-12-28 - Assignees: Thales - Applicants: Thales - Inventors: Marc TOURET; Katy GOURLAOUEN - Web page: https://patentgrep.com/patent/US20140196097A1 ## CPC - H04N 21/643: Communication protocols {(network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP], H04L65/65)} - H04N 21/236: Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream {(multiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00)} - H04N 21/23605: {Creation or processing of packetized elementary streams [PES]} - H04N 21/2383: Channel coding {or modulation} of digital bit-stream, e.g. QPSK modulation (arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002) - H04N 21/4382: {Demodulation or channel decoding, e.g. QPSK demodulation (analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002)} - H04N 21/6143: {involving transmission via a satellite} - H04N 21/6193: {involving transmission via a satellite (arrangements for data linking, networking or transporting, or for controlling an end to end session in a satellite broadcast system H04B7/18526)} - H04N 21/6338: directed to network - H04L 1/0003: {by switching between different modulation schemes} - H04L 1/0009: {by adapting the channel coding (H04L1/1812 takes precedence)} - H04L 1/0083: {Formatting with frames or packets; Protocol or part of protocol for error control} - H04L 27/0008: {arrangements for allowing a transmitter or receiver to use more than one type of modulation (negotiating modulation type for two-way transmission paths H04L5/1453)} - H04L 27/22: Demodulator circuits; Receiver circuits - H04L 27/2656: {Frame synchronisation, e.g. packet synchronisation, time division duplex [TDD] switching point detection or subframe synchronisation} - H04L 27/38: Demodulator circuits; Receiver circuits - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A communication system using the DVB-S2 standard, and its associated frame structure, comprises at least two users Ui, characterized in that the super-frame ST1 associated with the first user U1 is composed of at least one frame T1 each composed of at least one header, of a data part, the said super-frame ST1 comprising a number d1 of “dummy” variable size frames consisting of s1 slots, the super-frame ST2 associated with the second user U2 is composed of one or more frames T2 each composed of at least one header, of a data part, the said super-frame ST2 comprising a number d2 of “dummy” variable size frames consisting of s2 slots, the system comprises a module NCC adapted for determining the number d1 and the number d2 of dummies to be introduced so that the temporal duration of ST2 is equal to the temporal duration of ST1. ## Claims ### Claim 1 A communication system using the DVB-S2 standard, the said system comprising at least two users U1, U2, a management and control means wherein: the super-frame ST1 associated with the first user U1 is composed of at least one frame T1 composed of at least one header, of a data part, the said super-frame ST1 comprising a number d1 of “dummy” variable size frames consisting of s1 slots, the super-frame ST2 associated with the second user U2 is composed of at least one frame T2 composed of at least one header, of a data part, the said super-frame ST2 comprising a number d2 of “dummy” variable size frames consisting of s2 slots, the said management and control module is adapted for determining the number d1 and the number d2 of “dummy” frames to be introduced so that the temporal duration of ST2 is equal to the temporal duration of ST1. ### Claim 2 (depends on 1) The system according to claim 1, wherein the “dummy” variable size frames consist of slots of 90 symbols. ### Claim 3 (depends on 1) The system according to claim 1, wherein the system comprises k users Uk and in that a super-frame ST is defined by taking account of the minimum band B of the system and in that the super-frames STk of band nB are obtained by multiplying by n the number of frames per super-frames of band B. ### Claim 4 (depends on 1) The system according to claim 1, wherein the “dummy” slots or mute timeslots are distributed uniformly in a super-frame. ### Claim 5 (depends on 1) The system according to claim 1, wherein the “dummy” slots are distributed at the end of a compound super-frame ST. ### Claim 6 (depends on 1) The system according to claim 1, wherein it comprises a module adapted for introducing a given number of mute timeslots between two jumbo-frames. ### Claim 7 (depends on 1) The system according to claim 1, wherein it comprises a module adapted for introducing at the level of the header of a frame a signalling associated with the number of mute timeslots. ### Claim 8 (depends on 1) The system according to claim 1, wherein the frames are frames with pilots. ### Claim 9 (depends on 1) The system according to claim 1, wherein the frames are QPSK, 8 PSK, 16 APSK, or 32 APM frames. ### Claim 10 (depends on 1) The system according to claim 1, wherein a user is a drone. ### Claim 11 A method for constructing a super-frame intended to be used in a system using the DVB-S2 standard comprising at least two users U1, U2, a management and control means wherein it comprises at least the following steps: defining a first super-frame ST1 associated with a first user U1 composed of at least one header, of a data part, the said super-frame ST1 comprising a number d1 of “dummy” variable size frames consisting of s1 slots, defining a second super-frame ST2 associated with a second user U2 composed of at least one header, of a data part, the said super-frame ST2 comprising a number d2 of “dummy” variable size frames consisting of s2 slots, determining the number d1 and the number d2 of dummy frames to be introduced so that the temporal duration of ST2 is equal to the temporal duration of ST1. ### Claim 12 (depends on 11) The method according to claim 11, wherein a super-frame ST is constructed by executing the following steps: the structure of a super-frame ST is defined for the minimum band B of the system, the structure is obtained for the super-frames ST of bands n.B by multiplying by n the number of frames per super-frame of band B. ### Claim 13 (depends on 11) The method according to claim 11, wherein for a super-frame ST of K slots of 90 symbols, in the band n.B to obtain the same duration, n.K slots of 90 symbols are introduced. ### Claim 14 (depends on 11) The method according to claim 11, wherein a super-frame is supplemented with mute timeslots. ### Claim 15 A frame structure used in communication systems using the DVB-S2 standard, comprising a number of frames and a number of “dummy” frames disposed so as to obtain a super-frame of fixed duration, the duration of the super-frame obtained is identical for several users in communication whatever the allocated frequency band.