公开(公告)号：US07099289B2

公开(公告)日：2006-08-29

申请号：US10688080

申请日：2003-10-17

Applicant: Subir Varma

Inventor： Subir Varma

IPC: H04B7/005

CPC classification number: H04L1/08 ,  H04L1/0006 ,  H04L1/0025 ,  H04L1/1607 ,  H04L1/1854 ,  H04L1/1867 ,  H04L1/1883 ,  H04L1/1887 ,  H04L2001/0093 ,  H04W72/1278

Abstract: Point to multipoint wireless communication, including automatic retransmission and error recovery for packet oriented point to multipoint communication, which integrates adaptive and dynamic responsiveness for parameters for automatic retransmission using wireless communication. A wireless communication link is divided into a downstream portion and an upstream portion. Parameters are selected for automatic retransmission independently for the downstream portion and the upstream portion of the wireless communication link. A BSC controls the selection of parameters for automatic retransmission for all CPE within a cell. As part of a TDD frame, in which the BSC and the CPE share communication bandwidth using a TDMA technique, the BSC includes its selection of parameters for automatic retransmission to be used by CPE within a control section of the TDD frame. The BSC dynamically and adaptively determines new selected parameters for automatic retransmission, in response to conditions of a wireless communication link with each independent CPE. The BSC dynamically and adaptively allocates acknowledgement time slots within the upstream portion of the TDD frame, for use by each selected CPE. The BSC allocates some portion of the upstream bandwidth as a shared resource and some portion of the upstream bandwidth as unshared when there are messages received but not yet acknowledged. The BSC dynamically and adaptively response to acknowledgement and non-acknowledgement messages from each selected CPE, to integrate the automatic retransmission protocol with the TDD frame and the TDMA technique used within that frame.

公开(公告)号：US20060153094A1

公开(公告)日：2006-07-13

申请号：US11316415

申请日：2005-12-22

Applicant: Reza Majidi-Ahy ,  Joseph Hakim ,  Subir Varma

Inventor： Reza Majidi-Ahy ,  Joseph Hakim ,  Subir Varma

IPC: H04J1/16

CPC classification number: H04W72/005 ,  H04L1/0001 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/1816 ,  H04L1/1825 ,  H04L1/1854 ,  H04L1/1867 ,  H04L1/1893 ,  H04L2001/0093 ,  H04W28/0252 ,  H04W28/18 ,  H04W52/04 ,  H04W72/0413 ,  H04W72/082 ,  H04W76/40 ,  H04W88/08

Abstract: The invention provides a method and system for adaptive point to multipoint wireless communication. The wireless physical layer and the wireless media-access-control (MAC) layer collectively include a set of parameters, which are adaptively modified by a base station controller for communication with a plurality of customer premises equipment. The base station controller adjusts communication with each customer premises equipment individually and adaptively in response to changes in characteristics of communication, including physical characteristics, amount of communication traffic, and nature of application for the communication traffic.

公开(公告)号：US20060098582A1

公开(公告)日：2006-05-11

申请号：US11231537

申请日：2005-09-20

Applicant: Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Wong

Inventor： Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Wong

IPC: H04J1/16

CPC classification number: H04L1/0002 ,  H04B17/309 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/002 ,  H04L1/0034 ,  H04L1/16 ,  H04L1/1867 ,  Y02D50/10

Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur. It is determined that the measure of errors corresponds to more errors than the first predetermined threshold when more than a predetermined number of NACK messages occur in succession. It is determined that the measure of errors corresponds to fewer errors than the second predetermined threshold when more than a predetermined number of ACK messages occur in succession.

公开(公告)号：US06947479B2

公开(公告)日：2005-09-20

申请号：US10700352

申请日：2003-11-03

Applicant: Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

Inventor： Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

IPC: H04B7/26 ,  H04L1/00 ,  H04L1/16 ,  H04L29/06 ,  H04L29/08 ,  H04B3/46 ,  H04B17/00

CPC classification number: H04L1/0002 ,  H04B17/309 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/002 ,  H04L1/0034 ,  H04L1/16 ,  H04L1/1867 ,  Y02D50/10

Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur. It is determined that the measure of errors corresponds to more errors than the first predetermined threshold when more than a predetermined number of NACK messages occur in succession. It is determined that the measure of errors corresponds to fewer errors than the second predetermined threshold when more than a predetermined number of ACK messages occur in succession.

Abstract translation: 适应无线通信链路的无线链路参数的系统。 确定通过无线链路进行的通信中发生的错误的度量。 在错误测量对应于比第一预定阈值更多的错误的情况下，通信从第一组无线链路参数改变为第二组无线链路参数。 第二组无线链路参数对应于比第一组无线链路参数更高的误差容限。 在错误测量对应于比第二预定阈值更少的错误的情况下，通信从第一组无线链路参数改变为第三组无线链路参数。 第三组无线链路参数对应于比第一组无线链路参数更低的误差容限。 优选地，通过监视多个NACK消息和发生的ACK消息的数量来确定错误的度量。 当连续发生多于一个预定数量的NACK消息时，确定错误度量对应于比第一预定阈值更多的错误。 当连续发生多于一个预定数量的ACK消息时，确定错误度量对应于比第二预定阈值更少的错误。

公开(公告)号：US06650623B1

公开(公告)日：2003-11-18

申请号：US09475642

申请日：1999-12-30

Applicant: Subir Varma ,  Khuong Ngo ,  Jean Fuentes ,  Paul Truong ,  Majidi-Ahy Reza

Inventor： Subir Varma ,  Khuong Ngo ,  Jean Fuentes ,  Paul Truong ,  Majidi-Ahy Reza

IPC: H04L1228

CPC classification number: H04W52/50 ,  H04L1/0002 ,  H04L1/0025 ,  H04L1/16 ,  H04L2001/0093 ,  H04W4/06 ,  H04W28/18 ,  H04W48/08

Abstract: The invention provides a method and system for a wireless transport layer, such as for use in a wireless communication system. In a preferred embodiment, the wireless transport layer includes the capability for instructing customer premises equipment to adjust the physical characteristics on its communication link with the base station controller, and for instructing customer premises equipment to conduct further communications using those new physical characteristics. The wireless transport layer includes a number of provisions for adjusting communication between the base station controller and customer premises equipment in view of the prospect of adjusting physical characteristics for communication between the two end points. The use of a point-to-multipoint wireless channel provides services over a link whose parameters are continuously adapting to current conditions on a per-user basis.

Abstract translation: 本发明提供了一种用于无线传输层的方法和系统，例如用于无线通信系统中。 在优选实施例中，无线传输层包括指示客户驻地设备调整其与基站控制器的通信链路上的物理特性的能力，并且指示客户驻地设备使用这些新的物理特性进行进一步通信。 考虑到调整用于两个端点之间的通信的物理特性的前景，无线传输层包括用于调整基站控制器和客户端设备之间的通信的多个规定。 点对多点无线信道的使用通过其参数在每个用户基础上不断适应当前条件的链路来提供服务。

公开(公告)号：US06643322B1

公开(公告)日：2003-11-04

申请号：US09665394

申请日：2000-09-20

Applicant: Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

Inventor： Subir Varma ,  Reza Majidi-Ahy ,  Joseph Hakim ,  Wendy Chiu Fai Wong

IPC: H04L100

CPC classification number: H04L1/0002 ,  H04B17/309 ,  H04B17/336 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/002 ,  H04L1/0034 ,  H04L1/16 ,  H04L1/1867 ,  Y02D50/10

Abstract: A system that adapts wireless link parameters for a wireless communication link. A measure is determined of errors occurring in communication over a wireless link. In a case that the measure of errors corresponds to more errors than a first predetermined threshold, communication changes from a first set of wireless link parameters to a second set of wireless link parameters. The second set of wireless link parameters corresponds to higher error tolerance than the first set of wireless link parameters. In a case that the measure of errors corresponds to fewer errors than a second predetermined threshold, communication changes from the first set of wireless link parameters to a third set of wireless link parameters. The third set of wireless link parameters corresponds to lower error tolerance than the first set of wireless link parameters. Preferably, the measure of errors is determined by monitoring a number of NACK messages and a number of ACK messages that occur. It is determined that the measure of errors corresponds to more errors than the first predetermined threshold when more than a predetermined number of NACK messages occur in succession. It is determined that the measure of errors corresponds to fewer errors than the second predetermined threshold when more than a predetermined number of ACK messages occur in succession.

Abstract translation: 适应无线通信链路的无线链路参数的系统。 确定通过无线链路进行的通信中发生的错误的度量。 在错误测量对应于比第一预定阈值更多的错误的情况下，通信从第一组无线链路参数改变为第二组无线链路参数。 第二组无线链路参数对应于比第一组无线链路参数更高的误差容限。 在错误测量对应于比第二预定阈值更少的错误的情况下，通信从第一组无线链路参数改变为第三组无线链路参数。 第三组无线链路参数对应于比第一组无线链路参数更低的误差容限。 优选地，通过监视多个NACK消息和发生的ACK消息的数量来确定错误的度量。 当连续发生多于一个预定数量的NACK消息时，确定错误度量对应于比第一预定阈值更多的错误。 当连续发生多于一个预定数量的ACK消息时，确定错误度量对应于比第二预定阈值更少的错误。

公开(公告)号：US06535512B1

公开(公告)日：2003-03-18

申请号：US08614803

申请日：1996-03-07

Applicant: Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

Inventor： Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

IPC: H04L1256

CPC classification number: H04L12/5601 ,  H04L2012/5615 ,  H04L2012/5618

Abstract: An asynchronous transfer mode (ATM) digital electronic communication system includes an ATM communication system interconnection and termination unit (ATMCSI/TU). This ATMCSI/TU includes both a programmable microprocessor and several hardware-implemented coprocessors. The hardware-implemented coprocessors are under control of the microprocessor, and are dedicated to the performing of repetitive tasks. Thus, the microprocessor is freed to perform supervisory tasks in the ATM in addition to performing tasks associated with actual communication of digital data packages (i.e., CS-PDU's) in the ATM system. Thus, the APU is freed from doing repetitive data manipulation tasks, while these tasks are performed by one or more hardware-implemented coprocessors using memory mapped data structures and linked lists of data.

Abstract translation: 异步传输模式（ATM）数字电子通信系统包括ATM通信系统互连和终端单元（ATMCSI / TU）。 该ATMCSI / TU包括可编程微处理器和几个硬件实现的协处理器。 硬件实现的协处理器在微处理器的控制下，专用于执行重复任务。 因此，除了执行与ATM系统中的数字数据包（即，CS-PDU）的实际通信相关联的任务之外，微处理器被释放以执行ATM中的监督任务。 因此，APU被免除执行重复的数据操作任务，而这些任务由使用存储器映射的数据结构和链接的数据列表的一个或多个硬件实现的协处理器执行。

公开(公告)号：US5848068A

公开(公告)日：1998-12-08

申请号：US614804

申请日：1996-03-07

Applicant: Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

Inventor： Thomas Daniel ,  Dieter Nattkemper ,  Subir Varma

IPC: H04L12/56 ,  H04Q11/04

CPC classification number: H04Q11/0478 ,  H04L2012/5653

Abstract: An asynchronous transfer mode (ATM) digital electronic communication system includes an ATM communication system interconnection and termination unit (ATMCSI/TU). This ATMCSI/TU includes both a programmable microprocessor and several hardware-implemented coprocessors. The hardware-implemented coprocessors are under control of the microprocessor, and are dedicated to the performing of repetitive tasks. Thus, the microprocessor is freed to perform supervisory tasks in the ATM in addition to performing tasks associated with actual communication of digital data packages (i.e., CS-PDU's) in the ATM system. Thus, the APU is freed from doing repetitive data manipulation tasks, while these tasks are performed by one or more hardware-implemented coprocessors using memory mapped data structures and linked lists of data.

公开(公告)号：US08565256B2

公开(公告)日：2013-10-22

申请号：US13360334

申请日：2012-01-27

Applicant: Subir Varma

Inventor： Subir Varma

IPC: H04L12/413

CPC classification number: H04W16/04 ,  H04J3/1694 ,  H04L12/18 ,  H04W28/04 ,  H04W72/0413 ,  H04W72/0446 ,  H04W72/1284 ,  H04W72/14 ,  H04W74/02 ,  H04W74/06 ,  H04W74/0833

Abstract: A system for controlling a contention state for a communication link between a base station controller and customer premises equipment in point-to-multipoint communication. The contention state is controlled using a state machine, which includes a grant pending absent state in which a unicast request slot is maintained open for use by the customer premises equipment. During the grant pending absent state, the customer premises equipment sends no upstream data to the base station controller but can use the unicast request slot to request a data slot for sending upstream data to the base station controller. In the grant pending state, the customer premises equipment preferably uses piggybacking to request grant of a next data slot while sending upstream data to the base station controller.

公开(公告)号：US08503945B1

公开(公告)日：2013-08-06

申请号：US13435041

申请日：2012-03-30

Applicant: Subir Varma ,  Durga Prasad Satapathy

Inventor： Subir Varma ,  Durga Prasad Satapathy

IPC: H04B17/00

CPC classification number: H04L1/0625

Abstract: A wireless communication device is operated in a M by N multiple-input multiple-output (MIMO) mode. M is the number of antennas transmitting to the communication device from a first base station. N the number of receiving antennas and receivers. M and N are integers greater than one. The wireless communication device is operated in an M by N-1 MIMO mode while a first one of the N receiving antennas and a first one of the N receivers receives wireless communication from a second base station.