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1. 发明授权

US06650895B1 In-call DTMF transport for geostationary mobile satellite communication system 有权
标题翻译：用于对地静止移动卫星通信系统的通话DTMF传输
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。

2. 发明授权

US06778509B1 MAC layer protocol for a satellite based packet switched services 有权
标题翻译：用于基于卫星的分组交换服务的MAC层协议
公开(公告)号：US06778509B1
公开(公告)日：2004-08-17
申请号：US09714788
申请日：2000-11-16
申请人： Channasandra Ravishankar , Anthony Noerpel , Mahesh Kamath , Abheek Saha , James Hobza
发明人： Channasandra Ravishankar , Anthony Noerpel , Mahesh Kamath , Abheek Saha , James Hobza
IPC分类号： H04B7212
CPC分类号： H04B7/18589 , H04W8/24 , H04W72/0413 , H04W72/042 , H04W76/10 , H04W84/06
摘要： An approach for minimizing response times in transporting traffic over a packet radio communication system is disclosed. A terminal transmits a packet resource request message that specifies user terminal information using a contention channel according to a prescribed protocol. A gateway station receives the packet resource request message and transmits an assignment message that specifies a channel assignment based upon the user terminal information, wherein the terminal is configured to transmit the packets over a channel is based on the channel assignment. This approach has particular applicability to a satellite communication system.
摘要翻译：公开了一种用于最小化在分组无线电通信系统上传输业务的响应时间的方法。终端根据规定的协议使用竞争信道发送指定用户终端信息的分组资源请求消息。网关站接收分组资源请求消息，并且基于用户终端信息发送指定信道分配的分配消息，其中终端被配置为基于信道分配通过信道发送分组。这种方法特别适用于卫星通信系统。

3. 发明授权

US08963772B2 Method and system for acquiring ephemeris information 有权
标题翻译：获取星历信息的方法和系统
公开(公告)号：US08963772B2
公开(公告)日：2015-02-24
申请号：US13326209
申请日：2011-12-14
申请人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
发明人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
IPC分类号： G01S19/27 , G01S19/12 , G01S19/05 , G01S19/25 , G01S19/33
CPC分类号： G01S19/05 , G01S19/258 , G01S19/27 , G01S19/33
摘要： An approach provides for conversion of global positioning system (GPS) data. A user terminal receives positioning data from a base station, wherein the positioning data is received in a second format, and wherein the second format was derived from ephemeris data broadcast via a global positioning system (GPS) in a first format. The user terminal converts the positioning data from the second format into a third format that is compatible with a protocol of the GPS system, and determines a first fix using the third format of the positioning data.
摘要翻译：一种方法提供了全球定位系统（GPS）数据的转换。用户终端从基站接收定位数据，其中以第二格式接收定位数据，并且其中第二格式是通过第一格式的全球定位系统（GPS）从星历数据广播导出的。用户终端将来自第二格式的定位数据转换为与GPS系统的协议兼容的第三格式，并且使用定位数据的第三格式确定第一固定。

4. 发明授权

US06980800B2 System and method for providing contention channel organization for broadband satellite access in a communications network 有权
标题翻译：在通信网络中为宽带卫星接入提供竞争信道组织的系统和方法
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。

5. 发明申请

US20120146849A1 METHOD AND SYSTEM FOR ACQUIRING EPHEMERIS INFORMATION 有权
标题翻译：获取信息的方法和系统
公开(公告)号：US20120146849A1
公开(公告)日：2012-06-14
申请号：US13326209
申请日：2011-12-14
申请人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
发明人： Jun Xu , Yash Vasavada , Mike Parr , Channasandra Ravishankar , Anthony Noerpel , Je-Hong Jong
IPC分类号： G01S19/46 , G01S19/12
CPC分类号： G01S19/05 , G01S19/258 , G01S19/27 , G01S19/33
摘要： An approach provides for conversion of global positioning system (GPS) data. A user terminal receives positioning data from a base station, wherein the positioning data is received in a second format, and wherein the second format was derived from ephemeris data broadcast via a global positioning system (GPS) in a first format. The user terminal converts the positioning data from the second format into a third format that is compatible with a protocol of the GPS system, and determines a first fix using the third format of the positioning data.
摘要翻译：一种方法提供了全球定位系统（GPS）数据的转换。用户终端从基站接收定位数据，其中以第二格式接收定位数据，并且其中第二格式是通过第一格式的全球定位系统（GPS）从星历数据广播导出的。用户终端将来自第二格式的定位数据转换为与GPS系统的协议兼容的第三格式，并且使用定位数据的第三格式确定第一固定。

6. 发明授权

US10631195B2 Buffer status report trigger enhancement in a long term evolution and satellite communication system 有权
公开(公告)号：US10631195B2
公开(公告)日：2020-04-21
申请号：US15722776
申请日：2017-10-02
申请人： Nassir Benammar , Channasandra Ravishankar
发明人： Nassir Benammar , Channasandra Ravishankar
IPC分类号： H04W28/02 , H04W72/12 , H04B7/185 , H04W28/12 , H04L12/861 , H04W24/08 , H04W72/04 , H04W72/14
CPC分类号： H04W28/0278 , H04B7/18584 , H04W28/12 , H04W72/1215 , H04W72/1242 , H04W72/1284 , H04L49/90 , H04W24/08 , H04W72/0413 , H04W72/1252 , H04W72/14
摘要： A method for reporting backlog in a LTE-like environment is disclosed. The method includes: providing a pending allocation for transferring a pending request data; receiving a new request for transferring data prior to completion of transferring the pending request data; generating a backlog report for the new request; sending the backlog report within the pending allocation; and receiving a new allocation for the new request data.

7. 发明授权

US09099776B2 Method for iterative estimation of global parameters 有权
标题翻译：全局参数的迭代估计方法
公开(公告)号：US09099776B2
公开(公告)日：2015-08-04
申请号：US13403532
申请日：2012-02-23
申请人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
发明人： Yash Vasavada , Xiaoling Huang , Ambarish Purohit , Channasandra Ravishankar , John E. Corrigan, III
IPC分类号： H04B1/00 , H04B15/00 , H01Q3/26
CPC分类号： H01Q3/267
摘要： A method for iterative estimation of a set of unknown channel parameters in a beamforming network including determining a first order estimate of offsets at measurement nodes and an estimate of the confidence in the initial estimate of the measurement nodes' offsets, and iterating, until a desired estimation accuracy is obtained, determining an improved estimate of a parameter set, and the confidence in the estimates, using the prior estimate of the offsets at the measurement nodes and determining an improved estimate of the offsets at the measurement nodes and the associated confidence values using the prior estimate of the parameter set and the corresponding confidence values.
摘要翻译：一种用于迭代估计波束形成网络中的一组未知信道参数的方法，包括确定测量节点处的偏移量的一阶估计，以及对测量节点偏移的初始估计中的置信度的估计，并且迭代，直到所需的使用在测量节点处的偏移的先前估计来确定参数集合的改进的估计和估计的置信度并且使用以下方法确定测量节点处的偏移的改进的估计和相关联的置信度值：参数集的先前估计和相应的置信度值。

8. 发明授权

US07580424B2 System and method for providing real-time and non-real-time services over a communications system 有权
标题翻译：通过通信系统提供实时和非实时服务的系统和方法
公开(公告)号：US07580424B2
公开(公告)日：2009-08-25
申请号：US10245196
申请日：2002-09-17
申请人： Channasandra Ravishankar , Abheek Saha , Saurabh Garg , Michael Darcy
发明人： Channasandra Ravishankar , Abheek Saha , Saurabh Garg , Michael Darcy
IPC分类号： H04J3/16 , H04W72/00
CPC分类号： H04W28/18 , H04W4/00 , H04W28/24
摘要： A method, system, and computer program product for providing communications services, including determining a type of communications service present in a communications session based on quality of service parameters assigned for the communications session; and adjusting the quality of service parameters based a different type of communications service requested. The types of communications services include real-time and non-real-time communications services.
摘要翻译：一种用于提供通信服务的方法，系统和计算机程序产品，包括基于为通信会话分配的服务质量参数确定通信会话中存在的通信服务的类型; 以及基于所请求的不同类型的通信服务来调整服务质量参数。通信服务的类型包括实时和非实时通信服务。

9. 发明授权

US11778508B2 Backward compatible physical layer and signaling for satellite communication 有权
公开(公告)号：US11778508B2
公开(公告)日：2023-10-03
申请号：US17182899
申请日：2021-02-23
申请人： James J. Jong , Channasandra Ravishankar , William Whitmarsh , Nassir Benammar , Santharam Gurumani , Pablo Valle , Jianxia Luo
发明人： James J. Jong , Channasandra Ravishankar , William Whitmarsh , Nassir Benammar , Santharam Gurumani , Pablo Valle , Jianxia Luo
IPC分类号： H04W28/04 , H04W80/02 , H04L1/00 , H04W92/10
CPC分类号： H04W28/04 , H04L1/0005 , H04L1/0061 , H04W80/02 , H04W92/10
摘要： A method for communicating with a legacy terminal supporting a legacy air interface and a new terminal supporting a next generation air interface including: assigning a same carrier to the legacy terminal and the new terminal; receiving a terminal identifier and an optional payload for transmission at a MAC/RLC layer; determining if the terminal identifier is associated with the legacy terminal or the new terminal; composing, based on the determining, a burst header; formatting, a burst including the burst header and the optional payload; and transmitting the burst. In the method, the burst header is set to one of the one or more valid burst headers when the burst is associated with the legacy terminal, and the burst header is set to one of the one or more undefined burst headers when the burst is associated with the new terminal.

10. 发明授权

US11581656B2 Wide frequency range dual polarized radiating element with integrated radome 有权
公开(公告)号：US11581656B2
公开(公告)日：2023-02-14
申请号：US16716026
申请日：2019-12-16
申请人： Michael Buckley , Channasandra Ravishankar
发明人： Michael Buckley , Channasandra Ravishankar
IPC分类号： H01Q21/00 , H01Q1/42 , H01Q21/24
摘要： A low-profile array and a low-profile radiating element including: a stripline feed layer; a High Order Floquet (HOFS) part layer; and a radome layer in direct contact with the HOFS part layer, where the HOFS part layer is disposed between the stripline feed layer and the radome layer, and the radome layer includes a high dielectric constant (dk) environmentally robust material.

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