公开(公告)号：US06301232B1

公开(公告)日：2001-10-09

申请号：US09233179

申请日：1999-01-20

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7212

CPC classification number: H04B7/18513

Abstract: A method configures at least one channel group of a communication system. The channel group includes at least one forward channel and at least one return channel. A central station transmits data over the forward channel to a plurality of terminals, and transmissions by each terminal to the central station occur on a return channel. The method configures at least one channel group to include each forward channel and a selected number of return channels, which configuration is responsive to message traffic projections of each return channel. The selected number of return channels is generally limited to a maximum number of return channels when capacity of each forward channel of the channel group becomes exhausted.

Abstract translation: 一种方法配置通信系统的至少一个信道组。 信道组包括至少一个前向信道和至少一个返回信道。 中心站通过前向信道发送数据到多个终端，并且每个终端向中心站的传输发生在返回信道上。 该方法配置至少一个信道组以包括每个前向信道和选择数量的返回信道，该配置响应每个返回信道的消息流量预测。 当信道组的每个前向信道的容量耗尽时，所选择的返回信道数通常被限制为最大返回信道数。

公开(公告)号：US5450447A

公开(公告)日：1995-09-12

申请号：US954640

申请日：1992-09-30

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H03J7/02 ,  H03L7/087 ,  H03L7/095 ,  H03L7/107 ,  H03L7/113 ,  H04L27/227 ,  H04L27/06

CPC classification number: H04L27/2273 ,  H03J7/02 ,  H03L7/107 ,  H03L7/113 ,  H03L7/087 ,  H03L7/095

Abstract: An apparatus and method for improving the performance of a satellite communications modem is disclosed. The invention is particularly applicable to mobile satellite receivers, and includes a variable-gain automatic frequency controlled (AFC) loop, the gain of which is controlled adaptively, based on the AFC lock status and the lock status of the modem's inner loop, in addition to other parameters determined by the invention.

Abstract translation: 公开了一种改善卫星通信调制解调器性能的装置和方法。 本发明特别适用于移动卫星接收机，并且包括基于AFC锁定状态和调制解调器的内部循环的锁定状态自适应地控制增益的可变增益自动频率控制（AFC）循环，另外 涉及本发明确定的其它参数。

公开(公告)号：US11894911B2

公开(公告)日：2024-02-06

申请号：US17300542

申请日：2021-08-10

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7/185

CPC classification number: H04B7/18515 ,  H04B7/18513

Abstract: Methods and systems for low earth orbit satellite communications, utilizing fractionated satellites and constellations with large baselines. The latter, combined with spatial multiplexing protocols, provides access to user equipment on the ground with much greater spatial resolution than hitherto possible. Methods include overcoming the problem posed by the round-trip delay of satellite links when adaptive, downlink, beamforming is attempted in Frequency Division Duplex (FDD) systems. Methods include using of uplink and downlink pilot signals which eliminate the need for controlling the physical integrity of the fractionated satellite through an electromechanical servo-control system in space.

公开(公告)号：US08526941B2

公开(公告)日：2013-09-03

申请号：US11770063

申请日：2007-06-28

Applicant: Michael Tseytlin ,  Santanu Dutta

Inventor： Michael Tseytlin ,  Santanu Dutta

IPC: H04W4/00 ,  H04W40/00 ,  H04W36/00

CPC classification number: H04B7/18591

Abstract: Communications between a terminal and a terrestrial base station are established. The terrestrial base station receives a request to monitor a satellite base station from the terminal. The terrestrial base station grants the request and receives monitoring information for the satellite base station corresponding to the request. Granting of the request may include suspending transmission from the terrestrial base station to the terminal for a period of time sufficient to allow the terminal to request the monitoring information from the satellite base station and receiving monitoring information may include receiving the requested monitoring information at the terrestrial base station via a communications path not including the terminal. Suspending transmission from the terrestrial base station to the terminal may be followed by resuming transmission to the terminal before receiving the monitoring information at the terrestrial base station. The communications path not including the terminal may include a terrestrial Access Service Network Gateway serving the terrestrial base station and a satellite Access Service Network Gateway serving the satellite base station. Handover techniques are also described.

Abstract translation: 建立终端与地面基站之间的通信。 地面基站从终端接收到监视卫星基站的请求。 地面基站授予该请求，并接收对应于该请求的卫星基站的监视信息。 授予请求可以包括暂停从地面基站向终端的传输一段时间，以足以允许终端从卫星基站请求监视信息，并且接收监视信息可以包括在陆地接收请求的监视信息 基站通过不包括终端的通信路径。 在地面基站接收到监视信息之前，可以暂停从地面基站到终端的传输。 不包括终端的通信路径可以包括为地面基站服务的地面接入服务网络网关和为卫星基站服务的卫星接入服务网络网关。 还描述了切换技术。

公开(公告)号：US08433241B2

公开(公告)日：2013-04-30

申请号：US12536084

申请日：2009-08-05

Applicant: Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng ,  Serge Nguyen

Inventor： Santanu Dutta ,  Gary G. Churan ,  Dunmin Zheng ,  Serge Nguyen

IPC: H04B7/185

CPC classification number: H04B7/18513 ,  H04B7/18563 ,  H04B7/18591

Abstract: A communications system includes a space-based network (SBN) including a plurality of spotbeams using a first set of frequencies and an ancillary terrestrial network (ATN) including a plurality of base stations using a second set of radio frequencies. In a coverage zone of a given spot beam wherein the SBN and the ATN use at least one frequency from the first and second sets of frequencies in common, the SBN uses a narrower bandwidth than the ATN on both forward and return links, the ATN employs frequency spreading on at least its return link communications, the SBN employs spatial beam nulling directed toward at least one ancillary terrestrial component (ATC) of the ATN, the SBN employs forward link margin control, the ATN employs return link power control, the SBN employs return link power control and base stations of the ATN provide isolation in the direction of at least one satellite of the SBN. Using such a combination of measures, the ATN and the SBN may support completely or partially overlapping use of the first and second sets of radio frequencies.

Abstract translation: 通信系统包括基于空间的网络（SBN），其包括使用第一组频率的多个点波束和包括使用第二组射频的多个基站的辅助地面网络（ATN）。 在给定点波束的覆盖区域中，SBN和ATN使用来自第一和第二组频率的至少一个频率，SBN在前向链路和返回链路上使用比ATN更窄的带宽，ATN使用 SBN至少对其返回链路通信进行频率扩展，SBN采用针对ATN的至少一个辅助地面分量（ATC）的空间波束归零，SBN采用前向链路边缘控制，ATN采用返回链路功率控制，SBN采用 返回链路功率控制和ATN的基站在SBN的至少一个卫星的方向上提供隔离。 使用这种措施的组合，ATN和SBN可以支持第一和第二组无线电频率的完全或部分重叠的使用。

公开(公告)号：US20110077002A1

公开(公告)日：2011-03-31

申请号：US12960760

申请日：2010-12-06

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04W84/06

CPC classification number: H04W8/12 ,  H04B7/18545 ,  H04B7/18563

Abstract: Communications of a mobile station with a satellite mobile communications system and a terrestrial mobile communications system are coordinated. The mobile station is registered with the terrestrial mobile communications system and, responsive to the registration of the mobile station with the terrestrial mobile communications system, the mobile station is concurrently registered with the satellite mobile communications system. The concurrent registration may include implicitly registering the mobile station with the satellite mobile communications system, e.g., by storing information identifying the mobile station may be stored in a location register of the satellite mobile communications system responsive to the registration of the mobile station with the terrestrial mobile communications system, and maintaining synchronization between the two registrations. Authentication tokens may be pre-generated for quick re-registration with a satellite mobile communications system.

Abstract translation: 协调具有卫星移动通信系统和地面移动通信系统的移动台的通信。 移动站向地面移动通信系统登记，并且响应于移动站与陆地移动通信系统的注册，移动站同时向卫星移动通信系统登记。 并发注册可以包括将移动台与卫星移动通信系统进行隐含注册，例如，通过存储识别移动台的信息可以响应于移动台与地面的注册而被存储在卫星移动通信系统的位置寄存器中 移动通信系统，并保持两个注册之间的同步。 可以预先生成认证令牌，以便快速重新注册卫星移动通信系统。

公开(公告)号：US20100309828A1

公开(公告)日：2010-12-09

申请号：US12699466

申请日：2010-02-03

Applicant: Serge Nguyen ,  Santanu Dutta

Inventor： Serge Nguyen ,  Santanu Dutta

IPC: H04J1/00

CPC classification number: H04B7/18539 ,  H04L5/06 ,  H04W72/02 ,  H04W72/0453 ,  H04W84/06

Abstract: In some embodiments, a satellite communications network dynamically regulates carrier assignment for bidirectional communications between a satellite and radioterminals. The satellite communications network includes a resource manager that regulates the carrier assignments by selecting among a plurality of FDD return subcarriers, with potentially different subcarrier bandwidths and supporting different radio access technologies, within at least one FDD return carrier grouping for coupling to a selected one of a plurality of FDD forward carriers, and by controlling the satellite network to receive communications from the radioterminal on the selected FDD return subcarrier and to transmit communications to the radioterminal on the selected FDD forward carrier.

Abstract translation: 在一些实施例中，卫星通信网络动态地调节用于卫星和无线电终端之间的双向通信的载波分配。 卫星通信网络包括资源管理器，该资源管理器通过在多个FDD返回子载波之间选择具有潜在不同子载波带宽并支持不同无线电接入技术的方式来调整载波分配，所述至少一个FDD返回载波分组用于耦合到所选择的一个 多个FDD前向载波，并且通过控制卫星网络从所选择的FDD返回子载波上的无线电终端接收通信，并将通信发送到所选择的FDD前向载波上的无线电终端。

公开(公告)号：US20090137203A1

公开(公告)日：2009-05-28

申请号：US12341070

申请日：2008-12-22

Applicant: Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan

Inventor： Peter D. Karabinis ,  Santanu Dutta ,  Gary G. Churan

IPC: H04B7/185

CPC classification number: H04B7/18515 ,  H04B7/0408 ,  H04B7/10 ,  H04B7/2041

Abstract: A processor for use in a satellite communications system includes a selector that is configured to select a subset of a plurality of spatially diverse satellite signals based upon a location of a radioterminal. The processor further includes a signal processor that is configured to detect a return-link transmission from the radioterminal responsive to the selected subset of the spatially diverse satellite signals. The respective spatially diverse satellite signals may include respective signals corresponding to respective antenna elements of a satellite. The selector and the signal processor may be ground based.

Abstract translation: 一种用于卫星通信系统的处理器包括一个选择器，其被配置为基于无线电终端的位置来选择多个空间多样的卫星信号的子集。 处理器还包括信号处理器，其被配置为响应于所选择的空间多样性卫星信号的子集，从无线电终端检测返回链路传输。 相应的空间多样的卫星信号可以包括对应于卫星的各个天线元件的相应信号。 选择器和信号处理器可以是基于地面的。

公开(公告)号：US07357309B2

公开(公告)日：2008-04-15

申请号：US10874903

申请日：2004-06-22

Applicant: Angana Ghosh ,  Santanu Dutta

Inventor： Angana Ghosh ,  Santanu Dutta

IPC: G06K5/00

CPC classification number: G06Q20/3278 ,  G06Q20/045 ,  G06Q20/105 ,  G06Q20/20 ,  G06Q20/204 ,  G06Q20/32 ,  G06Q20/322 ,  G06Q20/341 ,  G06Q20/4033 ,  G06Q20/4037 ,  G06Q30/0601 ,  G07F7/0886 ,  G07F7/1008

Abstract: A mobile terminal is enabled to conduct an EMV transaction. A wireless access node in the EMV card-reader terminal is provided for connecting a mobile terminal to the card-reader terminal. An EMV-proxy module executing in the card-reader terminal facilitates communication between the mobile terminal and the card-reader terminal. The EMV-proxy module lets the mobile terminal function in essentially the same way as a regular EMV chip card with respect to the card-reader terminal. The card-reader terminal may then conduct EMV transactions on behalf of the mobile terminal without requiring new software and/or hardware at the EMV issuer. EMV data is stored in the mobile terminal in the form of secure dynamic data objects. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract translation: 移动终端能够进行EMV交易。 提供EMV读卡器终端中的无线接入节点用于将移动终端连接到读卡器终端。 在读卡器终端中执行的EMV代理模块便于移动终端与读卡器终端之间的通信。 EMV代理模块使移动终端的功能基本上与普通EMV芯片卡相对于读卡器终端相同。 读卡器终端可以代表移动终端进行EMV交易，而不需要EMV发行者的新的软件和/或硬件。 EMV数据以安全动态数据对象的形式存储在移动终端中。

公开(公告)号：US20080061137A1

公开(公告)日：2008-03-13

申请号：US11941325

申请日：2007-11-16

Applicant: Santanu Dutta ,  Nils Rydbeck

Inventor： Santanu Dutta ,  Nils Rydbeck

IPC: G06K5/00

CPC classification number: G06Q20/327 ,  G06Q20/045 ,  G06Q20/12 ,  G06Q20/32 ,  G06Q20/363 ,  G06Q20/367 ,  G06Q20/3672 ,  G06Q20/3674 ,  G06Q20/3676 ,  G06Q20/3678 ,  G07B15/00 ,  G07F7/0866 ,  G07F7/1016

Abstract: An approach to managing stored-value data objects, such as electronic tickets, comprises secure systems and procedures for ticket issuing, storage, and redemption. With these systems and procedures in place, stored-value data objects may be securely transferred to remote systems, such as a user's personal electronic device, for subsequent secure redemption, thus allowing the user to gain access to the desired goods or service upon redeeming the data object. Techniques provide secure delivery of the requested data object to the requesting device, and provide secure redemption and disposal of the data object. Ticket issuing systems may be Internet-accessible systems, and users may purchase and redeem tickets using mobile terminals or other devices adapted for wireless communication. Standardized WPKI and Internet access procedures may be employed in ticket issuance and redemption. Techniques further provide temporary and rapid verification data objects useful where rapid ticket verification is essential, such as mass transit systems.