公开(公告)号：US06463040B1

公开(公告)日：2002-10-08

申请号：US09300423

申请日：1999-04-28

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7212

CPC classification number: H04B7/18532 ,  H04B7/212

Abstract: Data transfer efficiencies of a frequency division and/or time division multiple access (FDMA/TDMA) communication methods are improved over prior art methods by communicating over a channel group of a comunication system. A central station transmits to a number of terminals over a forward channel, and transmissions by at least one of the terminals to the central station occur over a return channel of the channel group. The improved methods include the step of transmitting by the at least one of the plurality of terminals at least one superframe to the central station at one of a plurality of data rates over one of a plurality of return channels using a corresponding one of a plurality of data frames having lengths responsive to the one of the plurality of data rates. The methods may also include the step of formatting said transmission superframe comprising a plurality of frames by removing network management information which is not time critical from substantially all of the plurality of frames.

Abstract translation: 通过在通信系统的信道组上进行通信，分频和/或时分多址（FDMA / TDMA）通信方法的数据传输效率比现有技术方法得到改善。 中心站通过正向信道发送到多个终端，并且至少一个终端向中心站的传输发生在信道组的返回信道上。 改进的方法包括以下步骤：利用多个返回信道之一上的多个返回信道之一以多个数据速率中的一个以多个终端中的至少一个发送至少一个超帧到步骤 具有响应于所述多个数据速率之一的长度的数据帧。 所述方法还可以包括通过去除不是基本上所有多个帧时间关键的网络管理信息来格式化包括多个帧的所述传输超帧的步骤。

公开(公告)号：US06407986B1

公开(公告)日：2002-06-18

申请号：US09233067

申请日：1999-01-20

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04B7212

CPC classification number: H04B7/18513

Abstract: A method of communicating on at least one channel group of a communication system provides improved data transfer efficiencies over conventional systems by using discrete transfer rates. The channel group is includes at least one forward channel for channeling data transmitted from a central station to a plurality of terminals. At least one return channel is included for channeling transmissions by any of the plurality of terminals to the central station. Changes in the discrete data transfer rate are optionally accompanied by a change in a slot timing rate based on a frame transmission rate used over the forward channel. The method also allows the assignment of a predetermined number of return channel slots for a transmit frame for at least one combination of forward and return channels having prescribed forward and return data rates.

Abstract translation: 在通信系统的至少一个信道组上通信的方法通过使用离散传输速率提供了超过常规系统的改进的数据传输效率。 信道组包括用于将从中心站发送的数据传送到多个终端的至少一个前向信道。 包括至少一个返回信道用于将多个终端中的任何终端的传输引导到中心站。 离散数据传输速率的变化可选地伴随着基于在前向信道上使用的帧传输速率的时隙定时速率的改变。 该方法还允许为具有规定的前向和返回数据速率的前向和返回信道的至少一个组合的发送帧分配预定数量的返回信道时隙。

公开(公告)号：US06381289B1

公开(公告)日：2002-04-30

申请号：US09145105

申请日：1998-09-01

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H03D300

CPC classification number: H04B7/2643 ,  H04J3/0605 ,  H04L27/30

Abstract: A method of demodulating a communication signal is provided. The communication signal includes a plurality of pages with each page having a plurality of addresses and corresponding data packets. The demodulating method includes the steps of receiving the communication signal at a user terminal, identifying which of the plurality of pages are destined to the receiving user terminal, identifying which of the plurality of data packets within the identified page are destined to the receiving user terminal, and demodulating only the data packets identified as being destined to the receiving user terminal.

Abstract translation: 提供一种解调通信信号的方法。 通信信号包括多个页面，每个页面具有多个地址和对应的数据分组。 解调方法包括以下步骤：在用户终端处接收通信信号，识别多个页面中的哪个页面发往接收用户终端，识别所识别的页面中的多个数据分组中哪一个发往接收用户终端 并且仅解调识别为发往接收用户终端的数据分组。

公开(公告)号：US5982813A

公开(公告)日：1999-11-09

申请号：US723406

申请日：1996-09-30

Applicant: Santanu Dutta ,  Richard J. Mahany

Inventor： Santanu Dutta ,  Richard J. Mahany

IPC: H04B7/005 ,  H04L1/00 ,  H04B1/38

CPC classification number: H04W52/267 ,  H04L1/0003 ,  H04L1/0017 ,  H04L1/0019 ,  H04L1/0025 ,  H04W52/20

Abstract: In a communication system in which a transmitter transmits data over a communication channel of a fixed bandwidth to a receiver, the method according to which the transmit data rate is continuously adjusted to a rate which is substantially equal to a short-term average data rate. The channel capacity and/or other characteristics of the system, is continuously adjusted, through changes in transmit power, symbol rate and modulation format, to a level at which the ratio of received signal energy per bit to noise spectral density (E.sub.b /N.sub.o) at the receiver is close to but above its minimum acceptable level, thereby matching the channel capacity and/or other characteristics of the system to the traffic. The system has further attributes which adjust the transmit data rate responsive to conditions involving at least one of data traffic levels, power reserve emergency, thermal load and message priority.

Abstract translation: 在发送机通过固定带宽的通信信道向接收机发送数据的通信系统中，将发送数据速率连续调整为基本等于短期平均数据速率的速率的方法。 通过发射功率，符号率和调制格式的变化，将系统的信道容量和/或其他特性连续地调整到每比特的接收信号能量与噪声频谱密度（Eb / No）的比率， 在接收器处接近但高于其最小可接受水平，从而将系统的通道容量和/或其他特性与流量相匹配。 该系统具有进一步的属性，其响应于涉及数据业务级别，动力储存紧急，热负载和消息优先级中的至少一个的条件来调整发送数据速率。

公开(公告)号：US20240137109A1

公开(公告)日：2024-04-25

申请号：US18445636

申请日：2023-12-01

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：US08705436B2

公开(公告)日：2014-04-22

申请号：US11669481

申请日：2007-01-31

Applicant: Santanu Dutta ,  Peter D. Karabinis

Inventor： Santanu Dutta ,  Peter D. Karabinis

IPC: H04J3/08 ,  H04B7/185 ,  H04W4/00 ,  H04N7/20

CPC classification number: H04H20/22 ,  H04B7/18563 ,  H04H20/74 ,  H04H40/18

Abstract: Satellite broadcasting methods include providing a cellular satellite communications system configured to transmit information separately to a plurality of different geographic locations defined by a respective plurality of cellular satellite spotbeams, and concurrently transmitting a program signal on a plurality of different spotbeams. The plurality of different spotbeams may include less than a total number of spotbeams of the cellular satellite communications system. The plurality of different spotbeams may be selected adaptively from an available pool of spotbeams based on locations of users requesting the broadcast program signal. Corresponding satellite gateways, broadcast controllers and wireless user terminals are also provided.

Abstract translation: 卫星广播方法包括提供蜂窝式卫星通信系统，其被配置为将信息分别发送到由相应的多个蜂窝卫星点波束定义的多个不同的地理位置，并且同时在多个不同的光束上传送节目信号。 多个不同的光束可以包括小于蜂窝卫星通信系统的光束的总数。 基于请求广播节目信号的用户的位置，可以从可用的光束池自适应地选择多个不同的光束。 还提供对应的卫星网关，广播控制器和无线用户终端。

公开(公告)号：US08411751B2

公开(公告)日：2013-04-02

申请号：US12637774

申请日：2009-12-15

Applicant: Elif Albuz ,  Tarik Arici ,  Robert Jan Schutten ,  Santanu Dutta

Inventor： Elif Albuz ,  Tarik Arici ,  Robert Jan Schutten ,  Santanu Dutta

IPC: H04N7/18

CPC classification number: H04N5/145 ,  H04N7/0127

Abstract: A method includes projecting motion vectors describing a transformation from a previous video frame to a future video frame onto a plane between the previous video frame and the future video frame, detecting potential artifacts at the plane based on an intersection of a cover region and an uncover region on the plane, and analyzing a dissimilarity between a trial video frame and both the previous video frame and the future video frame. The trial video frame is generated between the previous video frame and the future video frame based on a frame rate conversion ratio derived from a source frame rate and a desired frame rate. The method also includes estimating reliability of the projected motion vectors based on the potential artifact detection and the dissimilarity analysis.

Abstract translation: 一种方法包括将描述从先前视频帧到未来视频帧的变换的运动矢量投影到先前视频帧和未来视频帧之间的平面上，基于覆盖区域和发现的交集来检测平面处的潜在伪影 区域，并且分析试验视频帧与先前的视频帧和将来的视频帧之间的不相似性。 基于从源帧率和期望帧速率导出的帧速率转换比，在先前视频帧和未来视频帧之间生成试用视频帧。 该方法还包括基于潜在神经检测和不相似性分析来估计投影运动矢量的可靠性。

公开(公告)号：US08270898B2

公开(公告)日：2012-09-18

申请号：US12255070

申请日：2008-10-21

Applicant: Peter D. Karabinis ,  Santanu Dutta

Inventor： Peter D. Karabinis ,  Santanu Dutta

IPC: H04B7/185

CPC classification number: H04B7/18513

Abstract: A first and/or a second communications system may provide communications service over a geographic area. A method of operating the first and/or the second communications systems may include generating a measure of aggregate interference reaching a satellite of the second communications system substantially from devices of the first communications system. The measure of aggregate interference reaching the satellite of the second communications system may be transmitted to an element of the first communications system.

Abstract translation: 第一和/或第二通信系统可以在地理区域上提供通信服务。 操作第一和/或第二通信系统的方法可以包括基本上从第一通信系统的设备生成到达第二通信系统的卫星的聚合干扰的度量。 到达第二通信系统的卫星的聚合干扰的测量可以被发送到第一通信系统的元件。

公开(公告)号：US08151329B2

公开(公告)日：2012-04-03

申请号：US11941325

申请日：2007-11-16

Applicant: Santanu Dutta ,  Nils Rydbeck

Inventor： Santanu Dutta ,  Nils Rydbeck

IPC: G06F7/04

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.

Abstract translation: 管理存储值数据对象（例如电子票据）的方法包括用于发票，存储和兑换的安全系统和程序。 利用这些系统和程序，存储值数据对象可以被安全地传送到诸如用户的个人电子设备的远程系统，以便随后的安全兑换，从而允许用户在兑换所需的商品或服务时获得所需的商品或服务 数据对象。 技术提供所请求的数据对象到请求设备的安全传递，并且提供对数据对象的安全的兑换和处置。 票务发放系统可以是互联网可访问的系统，用户可以使用适用于无线通信的移动终端或其他设备购买和兑换票据。 标准化WPKI和互联网接入程序可用于发票和兑换。 技术进一步提供临时和快速的验证数据对象，其中快速验证是必不可少的，例如大众运输系统。

公开(公告)号：US20110256849A1

公开(公告)日：2011-10-20

申请号：US13102718

申请日：2011-05-06

Applicant: Santanu Dutta

Inventor： Santanu Dutta

IPC: H04W12/00

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.