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21. 发明公开

EP1133081A2 Bandwidth allocation method and apparatus 失效
标题翻译： Verfahren und Anordnung zur Bandbreitenzuteilung
公开(公告)号：EP1133081A2
公开(公告)日：2001-09-12
申请号：EP01202017.8
申请日：1997-12-04
申请人： Inmarsat Ltd.
发明人： Harper, John Anthony , Macridis, Philip
IPC分类号： H04B7/26 , H04J3/16 , H04Q7/38 , H04Q7/22
CPC分类号： H04Q11/0478 , H04B7/18539 , H04B7/18545 , H04B7/1858 , H04J3/1682 , H04L2012/5607 , H04L2012/5608 , H04L2012/563 , H04L2012/5632 , H04L2012/5634 , H04W4/00 , H04W16/28 , H04W28/20 , H04W60/00 , H04W72/0453 , H04W74/04 , H04W76/10 , H04W76/15 , H04W76/30 , H04W84/06
摘要： A satellite communications system provides a communications service to a mobile terminal (2) on which different communications applications (4a to 4d) may be run. Calls are set up between any of the applications (4a to 4d) via a satellite (12) to a network management centre (18) which provides different service adaptors (20a to 20d) which adapt the calls to different types of service provided over terrestrial networks (22), such as telephony, facsimile, internet or ATM services. The bandwidth allocated to each call over the satellite link may be varied during the call according to demand either from the relevant application (4) or from the network management centre (18). Multiple calls may be connected concurrently to or from different applications running on the mobile terminal. A maximum bandwidth is allocated to each call. Efficient use is thereby made of the limited bandwidth available over the satellite (12), according to the instantaneous bandwidth requirements of different applications (4). For real-time calls requiring multiple slots per frame in a TDMA channel, the slots are mutually spaced apart to reduce delay.
摘要翻译：卫星通信系统向可以在其上运行不同通信应用（4a至4d）的移动终端（2）提供通信服务。通过卫星（12）到网络管理中心（18）的任何应用（4a至4d）之间建立呼叫，网络管理中心（18）提供不同的服务适配器（20a至20d），该适配器将呼叫适配于通过陆地提供的不同类型的服务网络（22），如电话，传真，互联网或ATM服务。根据来自相关应用（4）或网络管理中心（18）的需求，在呼叫期间分配给每个呼叫的带宽可以在呼叫期间变化。多个呼叫可以同时连接到移动终端上运行的不同应用程序或从移动终端上运行的不同应用程序连接。每个呼叫分配最大带宽。因此，根据不同应用的瞬时带宽要求（4），有效利用卫星（12）上可用的有限带宽。对于在TDMA信道中每帧需要多个时隙的实时呼叫，这些时隙相互间隔开以减少延迟。

22. 发明公开

EP1042870A1 CODING METHOD AND APPARATUS 失效
标题翻译：编码方法和IPMENT
公开(公告)号：EP1042870A1
公开(公告)日：2000-10-11
申请号：EP97950337.2
申请日：1997-12-24
申请人： Inmarsat Ltd.
发明人： FARRELL, Wade, Nicholas , RICE, Mark
IPC分类号： H03M13/12 , H03M13/00 , H04L27/34
CPC分类号： H04L1/0066 , H03M13/2903 , H03M13/2957 , H04L1/0042 , H04L1/0069 , H04L1/0071
摘要： A parallel concatenated coder (20) outputs a sequence of data sets in which earlier data sets contain data bits (d) and non-interleaved parity bits (p) without interleaved parity bits (q), while later data sets include the interleaved parity bits (q). Each data set is modulated as one symbol. The output format partially overcomes the delay incurred by interleaving the parity bits (q), with a substantially even distribution of data and parity bits in the sequence of data sets. The delay may be reduced further by interleaving with an index constraint.

23. 发明授权

EP0858706B1 Store-and-forward image communications system 失效
标题翻译：与存储和转发能力图像传输系统
公开(公告)号：EP0858706B1
公开(公告)日：2000-05-17
申请号：EP96935163.4
申请日：1996-11-04
申请人： Inmarsat Ltd.
发明人： TRACHTMAN, Eyal
IPC分类号： H04N1/32 , H04N1/333 , H04N1/00
CPC分类号： H04N1/32406 , H04N1/32122 , H04N1/324 , H04N1/32795 , H04N1/33307 , H04N1/33315 , H04N1/33369 , H04N1/4115 , H04N2201/3205 , H04N2201/3209 , H04N2201/3214 , H04N2201/3215 , H04N2201/3218 , H04N2201/3219 , H04N2201/3221 , H04N2201/3225 , H04N2201/3243 , H04N2201/3274 , H04N2201/3276 , H04N2201/3278 , H04N2201/33357 , H04N2201/33378
摘要： A store-and-forward image communications system for transmitting an image signal from a first terminal (24) to a second terminal (10) in one of a plurality of transmission modes which comprises: a transmission path (12, 14, 16, 18, 20) between the first and second terminals (10, 24); a first image signal interface (20) in said transmission path at which said image signal is received; a message store (116) connected to store and subsequently recall signals received at the first interface (20); a data store (302) containing at least one record (320) comprising preference data relating to preferred said transmission modes for at least one of said first and second terminals (10, 24); a transmission controller (118) selecting from said transmission control modes in accordance with said preference data; and a data updater (304) arranged to update the or each said record (320).

24. 发明公开

EP0847148A3 Paging channel control method and apparatus 失效
标题翻译：方法和装置用于在寻呼控制信道
公开(公告)号：EP0847148A3
公开(公告)日：2000-05-03
申请号：EP97309703.3
申请日：1997-12-02
申请人： Inmarsat Ltd.
发明人： Petri, Gerhard , Jones, Edward Arthur
IPC分类号： H04B7/185
CPC分类号： H04W68/00 , H04B7/18567 , H04W52/0216 , H04W84/022 , Y02D70/446
摘要： In a messaging system, message traffic is transmitted on one or more traffic channels (T1, T2 ) and the allocation of groups (S1, S2 ) of receivers to the traffic channels (T1, T2 ) is controlled by information transmitted on a bulletin board channel (BB). A predetermined number of frames before a change in the traffic channel allocation, a countdown value is transmitted in the relevant traffic channel (T1 ) and the countdown value is decremented in each subsequent frame. Before the countdown value reaches zero, the groups of receivers (S1, S2) retune to the bulletin board channel, receive their new channel allocations and retune to the traffic channel indicated for their group. The frame timings of the different traffic channels (T1, T2 ) are staggered to reduce the peak power required to transmit message bursts in these channels.

25. 发明授权

EP0788687B1 COMMUNICATION METHOD AND APPARATUS WITH TRANSMISSION OF A SECOND SIGNAL DURING ABSENCE OF A FIRST ONE 失效
标题翻译：通信方法及装置以传输的第二信号的第一的缺席时
公开(公告)号：EP0788687B1
公开(公告)日：2000-05-03
申请号：EP95934757.6
申请日：1995-10-27
申请人： Inmarsat Ltd.
发明人： FELDMAN, Howard, Ray
IPC分类号： H04J3/17 , H04B7/185
CPC分类号： H04B7/18532 , H04J3/17
摘要： A network station (4) receives a principal signal (S) and data (D). When the principal signal (S) is present or contains information, it is transmitted to a receiving station (6) through a communication channel. When the principal signal (S) is absent or does not have a significant information content, the network station (4) transmits the data (D) through the same communication channel in a format such that the data (D) is received and output by a further receiving station (8).

26. 发明公开

EP0993149A2 Channel allocation method and apparatus 审中-公开
标题翻译： Kanalzuteilungsverfahren und-gerät
公开(公告)号：EP0993149A2
公开(公告)日：2000-04-12
申请号：EP99307960.7
申请日：1999-10-08
申请人： Inmarsat Ltd.
发明人： Howard, Chris Frank , Christodoulides, Louis Mimis , Febvre, Paul , Mudge, David Denis , Stabile, James
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L63/08 , H04B7/18539 , H04B7/2121 , H04W12/02 , H04W12/06 , H04W28/06 , H04W60/00 , H04W72/04 , H04W72/12
摘要： A method for authenticating terminals in a wireless communication service involves receiving registration requests from terminals requiring access, transmitting to each of the terminals a signalling channel assignment signal allocating a duplex signalling channel uniquely to each terminal, transmitting in the signalling channel an authentication request signal, receiving an authentication response signal in the channel, the contents of which depend on the context of the authentication request signal, and deciding whether to allow access to the system according to the contents of the authentication response signal.
摘要翻译：一种用于在无线通信服务中验证终端的方法包括从需要接入的终端接收注册请求，向每个终端发送信令信道分配信号，唯一地向每个终端分配双工信令信道，在信令信道中发送认证请求信号，在信道中接收认证响应信号，其内容取决于认证请求信号的上下文，并根据认证响应信号的内容决定是否允许接入系统。

27. 发明授权

EP0832523B1 COMMUNICATION METHOD AND APPARATUS USING DATA COMPRESSION 失效
标题翻译：通信方法及装置数据压缩
公开(公告)号：EP0832523B1
公开(公告)日：2000-01-05
申请号：EP96917602.3
申请日：1996-06-14
申请人： Inmarsat Ltd.
发明人： OBRADORS, Joan , FELDMAN, Howard Ray , REMAEL, François-Arnaud
IPC分类号： H04B7/185
CPC分类号： H04B7/18528
摘要： A communications link for data communication via satellite includes interface apparatus (12) comprising a satellite link interface (20) for connection to a satellite link and a PSTN interface (22) for connection to a PSTN (14). The interface apparatus (12) supports different data compression modes in the communications link. Mode A allows data compression over the PSTN (14) but not over the satellite link. Mode B allows data compression over the PSTN (14) and over the satellite link, but enables decompression and recompression of data flowing in each direction through the interface apparatus (12). Mode C allows compressed data to pass transparently between the PSTN (14) and the satellite link, while the interface apparatus performs error correction on the satellite link and on the PSTN (14).

28. 发明授权

EP0772922B1 MULTI-BEAM TDMA SATELLITE MOBILE COMMUNICATIONS SYSTEM 失效
标题翻译： MOBILES TDMA卫星通信系统中的多波束天线
公开(公告)号：EP0772922B1
公开(公告)日：1999-12-08
申请号：EP95918688.3
申请日：1995-05-16
申请人： Inmarsat Ltd.
发明人： HART, Nicholas , BJÖRNSTROM, Gunnar
IPC分类号： H04B7/185
CPC分类号： H04B7/2041 , H04B7/18534 , H04B7/18539 , H04B7/1855
摘要： An earth station (8) receives a return signal (3) via more than one satellite link (4a, 4b) from a mobile terminal (2) using TDMA. The earth station (8) selects one or more of the satellite links (4a) for transmitting a forward signal (15) on the basis of the quality of signal (3; 15) received via each link. The earth section (8) allocates frequency channels to the mobile terminals (2) according to their location on the surface of the earth, so that the propagation time to and from those mobile terminals (2) which share the same frequency channel is approximately the same. The satellite (4a; 4b) includes an antenna which generates an array of beams which are individually pointed to fixed regions of the earth, until the elevation of the satellite (4a; 4b) relative to a fixed region falls below a minimum value, in which case the corresponding beam is redirected to a new area, while the other beams remain pointed at the corresponding fixed areas. In this way, beam-to-beam handover is reduced, while maintaining the boresight of the antenna pointing at the nadir.

29. 发明授权

EP1035666B8 Communication methods and apparatus for groups of transceivers with status reporting command 有权
标题翻译：用于与条件整流的控制发送器 - 发送器的组的方法和装置
公开(公告)号：EP1035666B8
公开(公告)日：2006-09-06
申请号：EP99309029.9
申请日：1999-11-12
申请人： Inmarsat Ltd.
发明人： Febvre, Paul , Mudge, David Denis
IPC分类号： H04B7/26 , H04B7/185
CPC分类号： H04B7/2656 , H04B7/18539 , H04B7/18582 , H04B7/18584 , H04B7/2123 , H04B7/26

30. 发明授权

EP1035666B1 Communication methods and apparatus for groups of transceivers with status reporting command 有权
标题翻译：具有状态报告命令的收发器组的通信方法和设备
公开(公告)号：EP1035666B1
公开(公告)日：2006-05-24
申请号：EP99309029.9
申请日：1999-11-12
申请人： Inmarsat Ltd.
发明人： Febvre, Paul , Mudge, David Denis
IPC分类号： H04B7/26 , H04B7/185
CPC分类号： H04B7/2656 , H04B7/18539 , H04B7/18582 , H04B7/18584 , H04B7/2123 , H04B7/26

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