公开(公告)号：WO2003096575A1

公开(公告)日：2003-11-20

申请号：PCT/GB2003/001938

申请日：2003-05-02

Applicant: INMARSAT LTD ,  RICHHARIA, Madhavendra ,  MUNDAY, Martin ,  BATY, Charlton

Inventor： RICHHARIA, Madhavendra ,  MUNDAY, Martin ,  BATY, Charlton

IPC: H04B7/185

CPC classification number: H04B7/18584 ,  H04L47/245

Abstract: In a communications system, channels can be assigned during an off-peak period with a lower pre-emption priority than normal channels, and may be pre-empted in favour of normal channels when insufficient channels are available. During a peak period, only normal channels can be assigned. A pool of available channels is maintained above a minimum level by pre-empting lower priority channels. Lower priority channels can be assigned from the pool only when it is above a threshold size. An advantage of this method is that channels can be assigned to non-critical applications during the off-peak period without substantially affecting the availability of channels during the peak period, thus encouraging more efficient use of off-peak channel capacity.

Abstract translation: 在通信系统中，可以在非常高峰期间分配信道，其优先级低于普通信道，并且当不充分的信道可用时，可以优先使用正常信道。 在高峰期间，只能分配正常频道。 通过优先使用较低优先权的渠道，将可用频道池维持在最低级别以上。 只有当阈值大于阈值时，才能从池中分配低优先级通道。 该方法的优点在于，在非高峰期期间，可以将信道分配给非关键应用，而不会在峰值期间基本上影响信道的可用性，从而可以更有效地利用非峰值信道容量。

公开(公告)号：JP2000269876A

公开(公告)日：2000-09-29

申请号：JP33154599

申请日：1999-11-22

Applicant: INMARSAT LTD

Inventor： FEBVRE PAUL ,  MUDGE DAVID DENIS ,  JONES EDWARD ARTHUR ,  FINES PANAGIOTIS

IPC: H04J3/00 ,  H04B7/212 ,  H04B7/26 ,  H04J3/06 ,  H04L7/10

Abstract: PROBLEM TO BE SOLVED: To control a transmission timing of a radio transceiver in a radio communication system. SOLUTION: In the radio communication system, a transceiver transmits a short burst to a base station. The base station finds timing correction from a received time of the burst and transmits it to a corresponding transceiver. In a mode, the base station instructs each transceiver about a plurality of time slots, each transceiver selects one of the time slots at random, formats the burst including an index of the selected time slot and transmits the burst in the slot. In other mode, the base station transmits a timing uncertain degree value to each transceiver. This value determines how each transceiver corrects the timing as an interval receiving finally the timing correction increases.

公开(公告)号：JP2004153830A

公开(公告)日：2004-05-27

申请号：JP2003367662

申请日：2003-10-28

Applicant: Inmarsat Ltd ,  インマルサット リミテッド

Inventor： MACRIDIS PHILIP ,  HARPER JOHN ANTHONY

IPC: H04J3/00 ,  H04B7/185 ,  H04B7/212 ,  H04J3/16 ,  H04L12/70 ,  H04Q11/04 ,  H04W4/00 ,  H04W16/28 ,  H04W28/20 ,  H04W60/00 ,  H04W72/04 ,  H04W74/04 ,  H04W76/02 ,  H04W76/06 ,  H04W84/06 ,  H04W99/00 ,  H04Q7/36

CPC classification number: 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 ,  H04W76/02 ,  H04W76/025 ,  H04W76/06 ,  H04W84/06

Abstract: PROBLEM TO BE SOLVED: To provide a mobile communication system wherein bandwidth available for each of calls between a mobile communication terminal and a base station is changed according to a demand to the bandwidth during a call without exceeding a prescribed maximum level determined for the call. SOLUTION: A center distributes the bandwidth to mobile terminals and connects the mobile terminals to a ground network 22. A mobile terminal 2 is provided with a portable computer and executes a large number of various communication applications 4a, 4b, 4c, 4d. Driver software 6 that is executed in the mobile terminal 2 exchanges an API protocol to a protocol which is designed for a satellite communication system and capable of insisting on ownership. The mobile terminal 2 provides a physical interface I4 to an interface card 8 such as a PC (formally PCMICA) card. The interface card 8 includes a radio frequency modulator/demodulator connected to an antenna 10. The radio frequency modulator/demodulator receives a first frequency channel and simultaneously transmits it to a second frequency channel. COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：提供一种移动通信系统，其中根据对呼叫期间的带宽的需求而改变在移动通信终端和基站之间的每个呼叫可用的带宽，而不超过为 电话。 解决方案：中心将带宽分配给移动终端，并将移动终端连接到地面网络22.移动终端2设置有便携式计算机，并且执行大量各种通信应用4a，4b，4c，4d 。 在移动终端2中执行的驱动程序软件6将API协议交换为为卫星通信系统而设计并能够坚持所有权的协议。 移动终端2向诸如PC（正式PCMICA）卡的接口卡8提供物理接口I4。 接口卡8包括连接到天线10的射频调制器/解调器。射频调制器/解调器接收第一频道并同时将其发送到第二频道。 版权所有（C）2004，JPO

公开(公告)号：WO2003069936A1

公开(公告)日：2003-08-21

申请号：PCT/GB2003/000680

申请日：2003-02-14

Applicant: INMARSAT LTD. ,  DRAKOS, Evripides

Inventor： DRAKOS, Evripides

IPC: H04Q7/36

CPC classification number: H04W16/12 ,  H04B7/18539 ,  H04W16/02

Abstract: In a carrier allocation scheme for a cellular communications system, cells are divided into groups of different types (CG1, CG2, CG3, CG4) and carriers (f xyz ) are divided into sets (f 1yz , f 2yz , f 3yz , f 4yz, ) allocated respectively to the different types. Carriers may be re-used between different groups of the same type, and optionally within a group, subject to a minimum re-use distance rule. The allocation patterns may be varied independently between different groups of the same type. The scheme may be adapted to the demand for carriers over a predetermined period. Different allocation schemes applied to different carriers may be overlaid on the same cells. Different allocation schemes may be applied to different cells, provided that the minimum re-use distance rule is obeyed between schemes. The scheme may be applied to spot beams of a satellite communications system, or cells of a terrestrial cellular system.

Abstract translation: 在蜂窝通信系统的载波分配方案中，小区被分成不同类型的组CG1，CG2，CG3，CG4，并且载波fxyz被分成分别分配给不同类型的组f1yz，f2yz，f3yz，f4yz。 可以在相同类型的不同组之间，并且可选地在组内重新使用运营商，但需要最小的再使用距离规则。 分配模式可以在相同类型的不同组之间独立地变化。 该方案可以适应于在预定时间段内对载波的需求。 应用于不同载波的不同分配方案可以覆盖在相同的小区上。 不同的分配方案可以应用于不同的小区，条件是在方案之间遵守最小的再使用距离规则。 该方案可以应用于卫星通信系统或地面蜂窝系统的小区的点波束。

公开(公告)号：WO02062005A3

公开(公告)日：2003-01-23

申请号：PCT/GB0200431

申请日：2002-01-30

Applicant: INMARSAT LTD ,  FEBVRE PAUL ,  FINES PANAGIOTIS

Inventor： FEBVRE PAUL ,  FINES PANAGIOTIS

IPC: H04L7/08 ,  H04J3/06 ,  H04L1/00 ,  H04L7/04

CPC classification number: H04L1/005 ,  H04J3/0602 ,  H04J3/0605 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/0068 ,  H04L1/0072 ,  H04L7/0008 ,  H04L7/048

Abstract: In a frame sync method, a receiver searches for the presence of an N-symbol long unique word pattern. For each possible frame sync detected, the receiver proceeds to demodulation and FEC processing. After each iteration of the FEC decoder, the detected unique word pattern is compared to the expected one and the frame sync is detected if the number of unique word errors has decreased.

Abstract translation: 在帧同步方法中，接收机搜索N符号长独特字模式的存在。 对于检测到的每个可能的帧同步，接收机进行解调和FEC处理。 在FEC解码器的每次迭代之后，将检测到的唯一字模式与期望的唯一字模式进行比较，并且如果唯一字错误的数量已经减少，则检测到帧同步。

公开(公告)号：WO2004028034A1

公开(公告)日：2004-04-01

申请号：PCT/GB2003/004154

申请日：2003-09-23

Applicant: INMARSAT LTD ,  TRACHTMAN, Eyal ,  GAMBARUTO, Elvio

Inventor： TRACHTMAN, Eyal ,  GAMBARUTO, Elvio

IPC: H04B7/185

CPC classification number: H04B7/1856 ,  H04B7/18584

Abstract: A hybrid satellite communications system comprises a broadcast satellite service (BG, BES, BS) providing a high bandwidth forward link (FLB) integrated with a mobile satellite communications network (HLES, SBES, MS) providing both forward and return links (FLM, RL), both of which are connected to a packet network (PN). Forward traffic is routed selectively via the broadcast service or mobile network according to whether a recipient user terminal (UT) is able to receive the broadcast service or sufficient capacity is available over the broadcast service. The hybrid system may receive an indication, via the return link (RL), of the broadcast spot beam (BB l-3) location of the user terminal (UT).

Abstract translation: 一种混合卫星通信系统包括一个广播卫星业务（BG，BES，BS），该广播卫星业务（BG，BES，BS）提供与提供前向链路和返回链路两者的移动卫星通信网络（HLES，SBES，MS）集成的高带宽前向链路（FLB） ），它们都连接到分组网络（PN）。 根据接收用户终端（UT）是否能够接收广播服务或通过广播服务可获得足够的容量，经由广播服务或移动网络选择性地转发前向业务。 混合系统可以经由返回链路（RL）接收用户终端（UT）的广播点波束（BB 1-3）位置的指示。

公开(公告)号：WO2003089953A1

公开(公告)日：2003-10-30

申请号：PCT/GB2003/001693

申请日：2003-04-22

Applicant: INMARSAT LTD ,  HOUGH, John, Ronald ,  FULLER, Andrew, Clement ,  FABIG, Anselm

Inventor： HOUGH, John, Ronald ,  FULLER, Andrew, Clement ,  FABIG, Anselm

IPC: G01S1/68

CPC classification number: G08B25/016 ,  B63C9/0005 ,  G01S1/68 ,  G08B25/08

Abstract: An emergency beacon, such as an emergency position indicating radio beacon (EPIRB) 1, has a transmitter 8 for transmitting a distress signal over a wireless communications network, such as a satellite communications network. It also has a receiver 10 for receiving a control signal over the wireless communications network and responds to receipt of the control signal to vary its operation. In particular, the EPIRB 1 can be controlled remotely to vary the times at which the distress signal is subsequently retransmitted by the EPIRB 1.

Abstract translation: 诸如指示无线电信标（EPIRB）1的紧急位置的紧急信标具有用于通过诸如卫星通信网络的无线通信网络发送遇险信号的发射机8。 它还具有接收器10，用于通过无线通信网络接收控制信号，并响应接收到控制信号以改变其操作。 特别地，EPIRB 1可以被远程控制，以改变随后由EPIRB 1重发遇险信号的时间。

公开(公告)号：WO9960810A2

公开(公告)日：1999-11-25

申请号：PCT/GB9901573

申请日：1999-05-18

Applicant: INMARSAT LTD ,  PHILLIPS KEVIN PAUL ,  FEBVRE PAUL ROGER

Inventor： PHILLIPS KEVIN PAUL ,  FEBVRE PAUL ROGER

IPC: H04Q7/38 ,  H04B7/15 ,  H04B7/185 ,  H04B7/212

CPC classification number: H04B7/18532 ,  H04B7/18545 ,  H04B7/212

Abstract: A satellite messaging system has at least one earth station (2) which sends messages to mobile terminals (6) either on TDM channels (T) or a to-mobile messaging channel MF, dependent on the length of the message. Messages are formatted into a variable number of frames each containing a variable but equal number of data packets, so as to make maximum use of the capacity of the frames. Messages and signalling information are transmitted by the mobile terminals (6) on a signalling channel (S) comprising frames F comprising both long (DS) and short (SS) slots, the division between such slots being controlled by the earth station (2). The mobile terminals (6) may operate in either an earth station registered mode, in which they tune to the earth station TDM channel (T) when idle, or a network registered mode, in which they tune to a network station TDM channel (NT) when idle. The earth station (2) may operate in a standard traffic mode, in a low traffic mode, in which the network station TDM channel NT and signalling channel NS replace the earth station TDM channel T and signalling channel S, or in a high traffic mode in which the earth station (2) transmits multiple TDM channels (T). The channel spacing between frequency channels used by mobile terminals (6) referenced to the same earth station TDM channel (T) is narrower than that between channels used by mobile terminals (6) referenced to different TDM channels (T). The earth station (2) transmits using a BPSK modulation scheme, while the mobile terminals transmit using a pi /2 BPSK modulation scheme. The earth station (2) stores lists of addresses which are indexed using a short-form addressing scheme, and can be modified by the mobile terminals (6). The mobile terminals (6) can request entry into a sleep mode.

Abstract translation: 卫星消息系统具有至少一个地球站（2），其根据消息的长度向TDM信道（T）或移动消息信道MF上的移动终端（6）发送消息。 消息被格式化为可变数目的帧，每帧包含一个变量但数量相同的数据包，以最大限度地利用帧的容量。 移动终端（6）在包括包含长（DS）和短（SS）时隙两者的帧F的信令信道（S）上发送消息和信令信息，这些时隙之间的划分由地球站（2） 。 移动终端（6）可以在地面站注册模式下工作，在地面站空闲模式下，它们在空闲时调谐到地球站TDM信道（T），或者在网络注册模式下调谐到网络站TDM信道（NT ）闲置时。 地面站（2）可以在标准通信量模式下工作，在低业务量模式下，其中网络站TDM信道NT和信令信道NS代替地球站TDM信道T和信令信道S，或者在高业务量模式 其中地球站（2）发射多个TDM信道（T）。 参考相同地球站TDM信道（T）的移动终端（6）使用的频率信道之间的信道间隔比参考不同TDM信道（T）的移动终端（6）使用的信道之间的信道间隔更窄。 地球站（2）使用BPSK调制方案进行发射，而移动终端使用π/ 2 BPSK调制方案进行发射。 地球站（2）存储使用短形式寻址方案索引的地址列表，并且可以由移动终端（6）修改。 移动终端（6）可以请求进入睡眠模式。

公开(公告)号：WO2005067367A3

公开(公告)日：2007-11-15

申请号：PCT/GB2004000226

申请日：2004-01-16

Applicant: INMARSAT LTD ,  DRAKOS EVRIPIDES

Inventor： DRAKOS EVRIPIDES

IPC: H04B7/204 ,  H04B17/40 ,  H04B7/185

CPC classification number: H04B7/2041 ,  H04B7/18513

Abstract: A multibeam is configured to transmit a duplicate of a channel from one spot beam in another spot beam, which contains a remote monitoring station. The satellite is reconfigurable to select the channel which is duplicated, allowing the beams of the satellite to be monitored, without the need for a remote monitoring station in each beam.

Abstract translation: 多波束被配置为从包含远程监控站的另一个点波束中的一个点波束发送信道的副本。 卫星可重构，以选择被复制的信道，允许对卫星的波束进行监视，而不需要在每个波束中的远程监视站。

公开(公告)号：WO2004114536A1

公开(公告)日：2004-12-29

申请号：PCT/GB2003/003298

申请日：2003-07-29

Applicant: INMARSAT LTD. ,  GRANT, Alexander

Inventor： GRANT, Alexander

IPC: H04B1/707

CPC classification number: H04L1/0051 ,  H04B1/71075 ,  H04L1/0066

Abstract: An interative multi-user detector and decoder includes a joint multi-user detector (DET) and separate soft demodulators (SDEM 1-K ), decoders (DEC 1-K ) and modulators (SM 1-K ) which provide updated estimates to the detector (DET) for the next iteration, through an estimated multi-user channel (EMA) which uses channel parameters estimated by a channel estimator (CE). The decoders (DEC 1-K ) use a low complexity decoding algorithm during initial iterations and a higher complexity decoding algorithm during subsequent iterations of the detecting and decoding process, thereby avoiding convergence bottlenecks that would occur if higher complexity decoding were used for all iterations. In the particular case of turbo-decoding, the number of turbo iterations is increased after the first iteraction.

Abstract translation: 交互式多用户检测器和解码器包括联合多用户检测器（DET）和单独的软解调器（SDEM1-K），解码器（DEC1-K）和调制器（SM1-K），其向检测器（DET ），用于通过使用由信道估计器（CE）估计的信道参数的估计多用户信道（EMA）进行下一次迭代。 解码器（DEC1-K）在初始迭代期间使用低复杂度的解码算法，并且在随后的检测和解码过程的迭代中使用较高复杂度的解码算法，从而避免了如果对所有迭代使用更高复杂度的解码，将会出现的收敛瓶颈。 在turbo解码的特定情况下，turbo迭代次数在第一次迭代之后增加。