公开(公告)号：US06233451B1

公开(公告)日：2001-05-15

申请号：US09115096

申请日：1998-07-13

申请人： Anthony Noerpel ,  Chandra Joshi ,  Michael Parr ,  Zhengping Gao ,  Stephanie Demers

发明人： Anthony Noerpel ,  Chandra Joshi ,  Michael Parr ,  Zhengping Gao ,  Stephanie Demers

IPC分类号： H04Q720

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： An access terminal for initiating spot beam selection in a satellite communication system, in which the access terminal includes a receiver for measuring the received signal strength (RSS) of a multiplicity of radio frequency communication spot beam links. The access terminal is further provided with a microcontroller for comparing the received signal strengths from each of the multiplicity of spot beams to initiate information communication via a communication channel of the satellite communication system. In a described embodiment, the controller of the access terminal compares seven spot beam links to determine whether to initiate information communication with one of the seven spot beams received. Additionally, a memory coupled to the controller of the access terminal is used for storing spot beam identification information including the spot beam links assigned to the access terminal via the satellite communication system. The selection procedure employed by the system and method described facilitate a rapid selection of an appropriate spot beam identified from the multiplicity of radio frequency spot beam links received at a mobile access terminal.

摘要翻译： 一种用于在卫星通信系统中发起点波束选择的接入终端，其中接入终端包括用于测量多个射频通信点波束链路的接收信号强度（RSS）的接收机。 接入终端还设置有微控制器，用于比较来自多个点波束中的每一个的接收信号强度，以通过卫星通信系统的通信信道发起信息通信。 在所描述的实施例中，接入终端的控制器比较七个点波束链路，以确定是否发起与所接收的七个点波束中的一个的信息通信。 此外，耦合到接入终端的控制器的存储器用于存储包括经由卫星通信系统分配给接入终端的点波束链路的点波束识别信息。 所述系统采用的选择过程和方法有助于快速选择从在移动接入终端处接收的多个射频点波束链路识别的适当的点波束。

公开(公告)号：US06249677B1

公开(公告)日：2001-06-19

申请号：US09247849

申请日：1999-02-11

申请人： Anthony Noerpel ,  Chandra Joshi ,  Stephanie Demers

发明人： Anthony Noerpel ,  Chandra Joshi ,  Stephanie Demers

IPC分类号： H04Q720

CPC分类号： H04B7/18558 ,  H04B7/2125

摘要： An apparatus and method, for use with the satellite-based communications network, for improving the reliability and speed at which communication between a user terminal and the network is established. The apparatus and method arranges data of a channel request message transmitted from a user terminal to a satellite in the satellite-based network to insure that the most critical data for establishing communication between the user terminal and the satellite-based network is received at the satellite during the appropriate receiving time frame window. The channel request message includes a first data group necessary for establishing a communication link for which information is transmitted between the apparatus and the network, and a second data group including information for decreasing the amount time necessary to establish the communication link. The first data group is positioned at the center of the channel request message, with portions of the second data group at opposite ends of the channel request message. The time at which the user terminal transmits the channel request message is set based on a location of the apparatus within a spot beam, to take into account the appropriate propagation delay time for the message to travel from the apparatus to the satellite in the network, thus assuring that at least the first data group of the channel request message is received at the satellite during an appropriate receiving time frame window.

摘要翻译： 一种用于卫星通信网络的设备和方法，用于提高用户终端和网络之间的通信建立的可靠性和速度。 该装置和方法将从用户终端发送的信道请求消息的数据排列到基于卫星的网络中的卫星，以确保在卫星接收用于建立用户终端和基于卫星的网络之间的通信的最关键数据 在适当的接收时间窗口。 信道请求消息包括建立用于在装置和网络之间传送信息的通信链路所需的第一数据组，以及包括用于减少建立通信链路所需的时间量的信息的第二数据组。 第一数据组位于信道请求消息的中心，第二数据组的部分位于信道请求消息的相对端。 用户终端发送信道请求消息的时间是基于点光束内的设备的位置来设置的，以考虑消息从设备行进到网络中的卫星的适当的传播延迟时间， 从而确保在适当的接收时间窗口期间至少在卫星处接收信道请求消息的第一数据组。

公开(公告)号：US06515617B1

公开(公告)日：2003-02-04

申请号：US09200133

申请日：1998-11-25

申请人： Stephanie Demers ,  Michael Parr ,  Anthony Noerpel ,  Dave Roos

发明人： Stephanie Demers ,  Michael Parr ,  Anthony Noerpel ,  Dave Roos

IPC分类号： H04B7185

CPC分类号： G01S19/252 ,  G01S5/0063 ,  G01S5/0252 ,  G01S2205/008

摘要： A system (20) and method (30) for estimating the location of a terrestrial-based user terminal (23) is provided. The user terminal (23) is capable of measuring the relative signal strengths of a plurality of spot beams pilot signal emitted from a geostationary satellite (22). The user terminal (23) then estimates its position based on the measured relative signal strengths. Using this approach, the user terminal (23) can quickly determine its location without prior knowledge of its position or delay time.

摘要翻译： 提供了一种用于估计地面用户终端（23）的位置的系统（20）和方法（30）。 用户终端（23）能够测量从地球静止卫星（22）发射的多个点波束导频信号的相对信号强度。 然后，用户终端（23）基于所测量的相对信号强度来估计其位置。 使用这种方法，用户终端（23）可以在不知道其位置或延迟时间的情况下快速地确定其位置。

公开(公告)号：US06289482B1

公开(公告)日：2001-09-11

申请号：US09115099

申请日：1998-07-13

申请人： Chandra Joshi ,  Anthony Noerpel ,  Xiaoping He ,  Prabir Datta

发明人： Chandra Joshi ,  Anthony Noerpel ,  Xiaoping He ,  Prabir Datta

IPC分类号： G08C2502

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： An approach for error flow control in a communications system involves receiving a plurality of frames of data; determining in said plurality of frames of data, two or more contiguous defective frames of data, the two or more contiguous defective frames of data being followed by at least one frame of data in said plurality of frames that is not defective; forming a group reject message indicative of a range of the two or more contiguous defective frames; transmitting the group reject message; and receiving replacement frames, the replacement frames corresponding to the two or more contiguous defective frames, wherein said at least one frame that is not defective is not received again in response to the group reject message.

摘要翻译： 通信系统中的误差流控制方法包括：接收多个数据帧; 在所述多个数据帧中确定两个或更多个连续的缺陷数据帧，所述两个或更多个连续的缺陷数据帧之后是所述多个帧中的至少一帧数据，该数据帧不是有缺陷的; 形成指示所述两个或更多个连续缺陷帧的范围的组拒绝消息; 发送组拒绝消息; 以及接收替换帧，所述替换帧对应于所述两个或更多个连续的缺陷帧，其中，所述至少一个不具有缺陷的帧不响应于所述组拒绝消息被再次接收。

公开(公告)号：US06516065B1

公开(公告)日：2003-02-04

申请号：US09247848

申请日：1999-02-11

申请人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su

发明人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su

IPC分类号： H04K100

CPC分类号： H04B7/18565 ,  H04L9/0637 ,  H04L9/12 ,  H04L2209/80

摘要： A mobile satellite communication system is provided to control the transfer of a terminal for a single-hop call from at least one of a clear mode and a ciphered mode with respect to a gateway station to a ciphered mode with respect to a satellite link connecting the terminal with another terminal for a single-hop, terminal-to-terminal call using a cipher key and an encryption algorithm common to the terminal and the other terminal. Frame number offset data, which indicates a mapping delay between received and transmitted time slots at the satellite, is provided to both terminals in a terminal-to-terminal call for ciphering synchronization.

摘要翻译： 提供了一种移动卫星通信系统，以便相对于将链路连接的卫星链路相对于网关站至清除模式和加密模式中的至少一个来控​​制用于单跳呼叫的终端的传输 终端与另一个终端进行单跳，终端到终端呼叫，使用密码和终端和另一终端共用的加密算法。 指示在卫星的接收和发送的时隙之间的映射延迟的帧号偏移数据被提供给用于加密同步的终端到终端呼叫中的两个终端。

公开(公告)号：US06353738B1

公开(公告)日：2002-03-05

申请号：US09247845

申请日：1999-02-11

申请人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su

发明人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su

IPC分类号： H04Q720

CPC分类号： H04B7/18558 ,  H04B7/18532

摘要： An MSAT system is provided which optimizes satellite resources when implementing a single-hop TtT call. The system allocates satellite channels and signaling channels for a single-hop TtT call to the participating terminals at an early stage during the call set-up procedure such that only a single pair of satellite channels are assigned to each of the terminals for call establishment and for use during the call, as opposed to two pairs of satellite channels. A test message for signaling channel (e.g., TTCH) validation is transmitted from the network (e.g., from a gateway station controller) to each of the terminals.

摘要翻译： 提供了一种实现单跳TtT呼叫时优化卫星资源的MSAT系统。 在呼叫建立过程中，系统在早期阶段将参与终端的单跳TtT呼叫的卫星信道和信令信道分配给卫星信道，使得只有一对卫星信道被分配给每个终端进行呼叫建立， 在通话期间使用，而不是两对卫星频道。 从网络（例如，从网关站控制器）向每个终端发送用于信令信道（例如，TTCH）验证的测试消息。

公开(公告)号：US06314290B1

公开(公告)日：2001-11-06

申请号：US09247847

申请日：1999-02-11

申请人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su ,  Dave Roos

发明人： Chandra Joshi ,  Anthony Noerpel ,  Chi-Jiun Su ,  Dave Roos

IPC分类号： H04Q720

CPC分类号： H04B7/18558

摘要： A mobile satellite (MSAT) system is provided for establishing a single-hop terminal-to-terminal call between two terminals. The MSAT system maintains a signaling path between each terminal and a gateway station during the terminal-to-terminal call although a call path between the mobile switching center and the originating terminal is blocked by the satellite. During single-hop call establishment, satellite channels for the terminal-to-terminal call path and for signaling are allocated. The allocated channels are assigned when a direct satellite link for the terminal-to-terminal call is established; otherwise, the call can proceed as a double-hop call using previously assigned satellite channels. A verification signal is sent on the direct satellite link which is for processing by the terminals and which contains information that causes the signal to be ignored by a gateway station. During a single-hop terminal-to-terminal call, signaling from a destination gateway station to an originating terminal at another gateway station is sent via an intranetwork communication system connecting traffic control subsystems in different gateway stations and the satellite channels allocated to the originating terminal

摘要翻译： 提供移动卫星（MSAT）系统，用于在两个终端之间建立单跳终端到终端呼叫。 尽管移动交换中心和始发终端之间的呼叫路径被卫星阻挡，但在终端到终端呼叫期间，MSAT系统维护每个终端与网关站之间的信令路径。 在单跳呼叫建立期间，分配用于终端到终端呼叫路径和信令的卫星信道。 当终端到终端呼叫的直接卫星链路建立时，分配的信道被分配; 否则，呼叫可以使用以前分配的卫星信道作为双跳呼叫进行。 在由终端进行处理的直接卫星链路上发送验证信号，其中包含导致信号被网关站忽略的信息。 在单跳终端到终端呼叫中，通过连接不同网关站中的业务控制子系统和分配给始发终端的卫星信道的内网通信系统来发送从目的地网关站到另一个网关站的始发终端的信令

公开(公告)号：US06650895B1

公开(公告)日：2003-11-18

申请号：US09447696

申请日：1999-11-23

申请人： Channasandra Ravishankar ,  David Roos ,  Anthony Noerpel ,  Chandra Joshi ,  James Hobza ,  Prabir Datta ,  Yi Chen

发明人： Channasandra Ravishankar ,  David Roos ,  Anthony Noerpel ,  Chandra Joshi ,  James Hobza ,  Prabir Datta ,  Yi Chen

IPC分类号： H04Q720

CPC分类号： H04B7/19 ,  H04M3/2281 ,  H04M3/533 ,  H04Q1/45

摘要： A system and a methodology to improve the end-user quality of service both in terms of response time and reliability for the transport of in-call DTMF signals in wireless systems, particularly in geostationary mobile satellite systems. The methodology encompasses several techniques to provide acceptable end-to-end quality of service for DTMF. A technique is applicable for transport of DTMF in the wireless subscriber to network direction, where DTMF digits are carried in the form of an out-band message. The central part of the technique is to allow multiple key presses in the same message, thereby increasing efficiency and throughput in long-delay environment. Another technique utilizes the vocoder's functionality to carry DTMF in-band, thereby reducing system complexity. The scheme makes the use of an integrated DTMF detector which can classify a given frame of signal into several classes so that the DTMF encoded packet can carry a unique pattern across the air-interface to the voice decoder at AT, which is capable of identifying the pattern. Another technique pertains to the use of a message based DTMF transport between two-ATs on a separate logical channel with a unique Service Access point Identifier (SAPI) providing guaranteed service for DTMF transport in an AT-AT call.

摘要翻译： 在无线系统，特别是对地静止移动卫星系统中，在无线系统中传输呼叫中的DTMF信号的响应时间和可靠性方面，提高最终用户服务质量的系统和方法。 该方法包括几种为DTMF提供可接受的端到端服务质量的技术。 一种技术适用于将无线用户中的DTMF传输到网络方向，其中DTMF数字以带外消息的形式携带。 该技术的核心部分是允许同一消息中的多个按键按压，从而在长时间延迟环境中提高效率和吞吐量。 另一种技术利用声码器的功能来携带DTMF带内，从而降低系统的复杂性。 该方案使用集成的DTMF检测器，其可以将给定的信号帧分类成多个等级，使得DTMF编码的分组可以在AT的语音解码器的空中接口上携带唯一的模式，其能够识别 模式。 另一种技术涉及在独立的逻辑信道上的两个AT之间使用基于消息的DTMF传输与唯一的服务接入点标识符（SAPI），其在AT-AT呼叫中为DTMF传输提供有保证的服务。

公开(公告)号：US06278876B1

公开(公告)日：2001-08-21

申请号：US09115098

申请日：1998-07-13

申请人： Chandra Joshi ,  Anthony Noerpel ,  Neeraj Tewari ,  Gerard Stelzer ,  David Roos ,  Chi-Jiun Su

发明人： Chandra Joshi ,  Anthony Noerpel ,  Neeraj Tewari ,  Gerard Stelzer ,  David Roos ,  Chi-Jiun Su

IPC分类号： H04Q720

CPC分类号： H04B7/2125 ,  H04B7/18517 ,  H04B7/18539 ,  H04B7/18543 ,  H04B7/18558 ,  H04B7/18567 ,  H04B7/18571 ,  H04B7/1858 ,  H04B7/18582 ,  H04B7/19 ,  H04B7/2041 ,  H04W28/14 ,  H04W52/0203 ,  H04W52/0216 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/00 ,  H04W76/10 ,  H04W76/25 ,  H04W80/00 ,  H04W84/06 ,  Y02D70/1222 ,  Y02D70/164 ,  Y02D70/20 ,  Y02D70/446

摘要： A system and method for implementing single hop space segment terminal to terminal connections. The system includes a satellite-based radio frequency (RF) communication link for conveying multiple communication channels over the space segment via one or more spot beams. A terrestrial supervisory transceiver such as a gateway station is provided in communication with the satellite-based communication link. Mobile hand-held terminals (HHTs), herein first and second access terminals, may be located within one or more of the spot beams to communicate with one another via a single hop connection through a satellite of the system. A switch is provided for communication switching with the satellite of the system for the multiple communication channels to couple the first access terminal and the second access terminal over the space segment via one or more of the spot beams. The terrestrial supervisory transceiver or gateway is provided in communication with the satellite switch via the satellite-based communication link for implementing the single hop space segment terminal to terminal connection.

摘要翻译： 一种实现单跳空间段终端到终端连接的系统和方法。 该系统包括用于经由一个或多个点波束在空间段上传送多个通信信道的基于卫星的射频（RF）通信链路。 提供与卫星通信链路通信的诸如网关站的地面监控收发器。 本文中的第一和第二接入终端中的移动手持终端（HHT）可以位于一个或多个点波束内，以经由通过系统的卫星的单跳连接来彼此通信。 提供了用于与用于多个通信信道的系统的卫星进行通信切换的开关，以通过一个或多个点波束将空间段上的第一接入终端和第二接入终端耦合。 提供地面监控收发信机或网关，通过基于卫星的通信链路与卫星交换机通信，实现单跳空间段终端到终端连接。

公开(公告)号：US06980800B2

公开(公告)日：2005-12-27

申请号：US10074759

申请日：2002-02-12

申请人： Anthony Noerpel ,  Channasandra Ravishankar ,  Xiaoping He ,  Abheek Saha

发明人： Anthony Noerpel ,  Channasandra Ravishankar ,  Xiaoping He ,  Abheek Saha

IPC分类号： H04W74/08 ,  H04Q7/20 ,  H04B7/212

CPC分类号： H04W74/0833

摘要： Two types of contention channels are used to accommodate broadband packet data in a satellite communication network. A first contention channel is used by unsynchronized user terminals to access the system and request a traffic channel. The first contention channel is of a sufficient duration to accommodate a RACH message, as well as the timing uncertainty between user terminals within a given spot beam. A second contention channel is shorter in duration than the first contention channel, and is narrowband, so that more than one second contention channel may be transmitted within the bandwidth of the broadband traffic channels. The second contention channels are used by synchronized user terminals for transmitting packet RACH, or PRACH, messages. The more efficient nature of the PRACH channels accommodates the increased overhead associated with bursty packet data, without the capacity cost of the longer duration RACH channel.

摘要翻译： 两种类型的竞争通道用于在卫星通信网络中容纳宽带分组数据。 不同步的用户终端使用第一争用通道访问系统并请求业务信道。 第一争用信道具有足够的持续时间以适应RACH消息，以及在给定点波束内的用户终端之间的定时不确定性。 第二争用信道的持续时间比第一竞争信道短，并且是窄带，使得可以在宽带业务信道的带宽内传输多于一个的第二争用信道。 第二争用信道由同步用户终端用于发送分组RACH或PRACH消息。 PRACH信道的更高效的性质适应与突发分组数据相关联的增加的开销，而不需要较长持续时间的RACH信道的容量成本。