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公开(公告)号：DE69522830D1
公开(公告)日：2001-10-25
申请号：DE69522830
申请日：1995-03-29
Applicant: INMARSAT LTD
Inventor： POSKETT PETER , MULLINS DENNIS , NOMOTO SHINICHI , GOSSELIN STEPHANE
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公开(公告)号：GB2357942B
公开(公告)日：2001-08-22
申请号：GB0106670
申请日：1996-07-31
Applicant: INMARSAT LTD
Inventor： KAWAI NOBUYUKI , WONG HOK SHUEN , MCTIFFIN MICHAEL JOHN , RANDALL DAVID
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4 . The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period. When a new local register 10 enters the broadcast reception group, the network register 4 informs the new local register 10 which new frame will next be transmitted. The number of bits used for frame sequence numbers is greater than that defined in the HDLC protocols.
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公开(公告)号：GB2357678B
公开(公告)日：2001-08-22
申请号：GB0106660
申请日：1996-07-31
Applicant: INMARSAT LTD
Inventor： KAWAI NOBUYUKI , WONG HOK SHUEN , MCTIFFIN MICHAEL JOHN , RANDALL DAVID
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4 . The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period. When a new local register 10 enters the broadcast reception group, the network register 4 informs the new local register 10 which new frame will next be transmitted. The number of bits used for frame sequence numbers is greater than that defined in the HDLC protocols.
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公开(公告)号：GB2357678A
公开(公告)日：2001-06-27
申请号：GB0106660
申请日：1996-07-31
Applicant: INMARSAT LTD
Inventor： KAWAI NOBUYUKI , WONG HOK SHUEN , MCTIFFIN MICHAEL JOHN , RANDALL DAVID
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4. The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period.
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公开(公告)号：GB0106667D0
公开(公告)日：2001-05-09
申请号：GB0106667
申请日：1996-07-31
Applicant: INMARSAT LTD
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4 . The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period. When a new local register 10 enters the broadcast reception group, the network register 4 informs the new local register 10 which new frame will next be transmitted. The number of bits used for frame sequence numbers is greater than that defined in the HDLC protocols.
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Patent Agency Ranking
公开(公告)号：GB0106662D0
公开(公告)日：2001-05-09
申请号：GB0106662
申请日：1996-07-31
Applicant: INMARSAT LTD
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4 . The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period. When a new local register 10 enters the broadcast reception group, the network register 4 informs the new local register 10 which new frame will next be transmitted. The number of bits used for frame sequence numbers is greater than that defined in the HDLC protocols.
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公开(公告)号：GB0106660D0
公开(公告)日：2001-05-09
申请号：GB0106660
申请日：1996-07-31
Applicant: INMARSAT LTD
Abstract: Data relating to the status of users 12 in a mobile communications system is broadcast via satellite 8 from a network register 4 to local registers 10 in an HDLC format. Each of the local registers 10 requests retransmission of any HDLC frames which are incorrectly received. The network register 4 records the earliest transmitted frame not yet acknowledged by all of the local registers and inhibits transmission of new frames if they fall outside a transmission window relative to the earliest transmitted frame. The network register 4 polls the local registers 10 for retransmission requests and the local registers 10 also send unsolicited requests to the network register 4 . The network register 4 only retransmits a frame once if multiple requests for that frame are transmitted within a predetermined period. When a new local register 10 enters the broadcast reception group, the network register 4 informs the new local register 10 which new frame will next be transmitted. The number of bits used for frame sequence numbers is greater than that defined in the HDLC protocols.
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公开(公告)号：GB0031323D0
公开(公告)日：2001-02-07
申请号：GB0031323
申请日：2000-12-21
Applicant: INMARSAT LTD
Abstract: A system for providing real-time television broadcasts to an aircraft (4) via satellite (2) is described. The broadcast signal (11) is transmitted to the aircraft (4) together with a communications signal (10), forming part of an existing communications network air interface. The system separates the communications signal (10) from the broadcast signal (11) and enables the real-time broadcast to be displayed on-board the aircraft.
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公开(公告)号：DE69610502T2
公开(公告)日：2001-02-01
申请号：DE69610502
申请日：1996-07-26
Applicant: INMARSAT LTD
Inventor： FEBVRE PAUL , PHILLIPS KEVIN
Abstract: A mobile terminal (6) communicates via a satellite (8), which projects a number of overlapping spot beams (10), with a fixed earth station (2). To determine which spot beam (10) is to be used for communication, the mobile terminal signals in a common signalling channel which is simultaneously received by all, or a subgroup of, the spot beams (10). The satellite (8) retransmits to the fixed earth station (2) in separate channels the signal as received by each of the spot beams (10) which are able to receive the common signalling channel. The relative strengths of the signal as received in the different spot beams (10) are compared at the fixed earth station and a communications channel is assigned to the mobile terminal in one of the spot beams (10), selected according to the comparison of signal strengths.
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公开(公告)号：GB2350519A
公开(公告)日：2000-11-29
申请号：GB0020720
申请日：1996-07-31
Applicant: INMARSAT LTD
Inventor： MCHUGH THOMAS FRANCIS HAROLD , FELDMAN HOWARD RAY
Abstract: A data interface apparatus (10) provides an interface between an analog communications link (a 2 ) and a digital communications link (d 2 ). Analog dialling codes on the analog communications link (a 2 ) are converted to control codes for controlling a digital communications interface (12) attached to the digital communications link (a 2 ) for providing access to a digital communications network (16, 18, 20). The data interface apparatus (10) delays call set-up with a modem (6) connected to the analog communications link (a 1 ,a 2 ) so as to synchronize completion of call set-up with another call set-up procedure performed on a remote analog link (a 3 ,a 4 ) connected to the digital communications network (16, 18, 20).
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