公开(公告)号：US06819657B1

公开(公告)日：2004-11-16

申请号：US09714783

申请日：2000-11-16

Applicant: Subir Varma

Inventor： Subir Varma

IPC: H04B7005

CPC classification number: H04L1/0025 ,  H04L1/0007 ,  H04L1/0009 ,  H04W28/18 ,  H04W88/12

Abstract: The invention provides a method and system for dynamically controlling link parameters during communication between one or more receiver/transmitters. Transmissions are sent as frames from a Base Station Controller to one or more Customer Premises Equipment. Together with a payload, each frame contains a special control message that pre-announces to both the transmitter and receiver the link parameters to be used until changed. The receiving Customer Premises Equipment processes the link parameters and returns a payload of its own within the same frame. With this dynamic approach, link parameters may be changed as often as every frame.

Abstract translation: 本发明提供了一种用于在一个或多个接收器/发射器之间的通信期间动态地控制链路参数的方法和系统。 传输作为帧从基站控制器发送到一个或多个客户驻地设备。 与有效载荷一起，每个帧包含一个特殊的控制消息，其预先向发射机和接收机通知要使用的链路参数直到改变。 接收的客户驻地设备处理链路参数，并在同一帧内返回自己的有效载荷。 通过这种动态方法，链路参数可以像每一帧一样频繁地改变。

公开(公告)号：US06654384B1

公开(公告)日：2003-11-25

申请号：US09475716

申请日：1999-12-30

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

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

IPC: H04J322

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.

Abstract translation: 本发明提供一种用于自适应点对多点无线通信的方法和系统。 无线物理层和无线介质访问控制（MAC）层共同地包括一组参数，其由基站控制器自适应地修改以与多个客户驻地设备通信。 基站控制器响应于通信特性的变化（包括物理特性，通信量的量，以及通信业务的应用性质）自适应地调整与每个客户驻地设备的通信。

公开(公告)号：US06275497B1

公开(公告)日：2001-08-14

申请号：US08917735

申请日：1997-08-27

Applicant: Subir Varma ,  Frederick Enns

Inventor： Subir Varma ,  Frederick Enns

IPC: H04L1228

CPC classification number: H04L29/06 ,  H04L12/2801 ,  H04L47/10 ,  H04L67/325 ,  H04L67/42 ,  H04L69/329

Abstract: A medium access controller for a multi-user network that assigns or changes the operating protocol of multiple upstream channels according to user loading, user status, and/or type of payload data transfers requested by the user or detected by the controller. One group of upstream channels utilizes a contention-only protocol for non-responding or off-line users, a second group utilizes a limited type polling protocol for users requiring only brief transfers of payload data, and a third group utilizes an exhaustive polling protocol user requiring large amounts of payload data transfers. Limited type polling provides low latency for quick response to accommodate multiple users, while exhaustive polling provides large data throughput at the expense of latency. Additional levels of limited or exhaustive polling may be employed to accommodate a larger variety of users needs. In addition, the channels themselves may be dynamically reclassified between and among contention and first and/or other level polling modes based on user loading and/or the nature and character of on-going data transfers in order to achieve maximum utilization of shared resources. After initiating a data transmission, the controller may also dynamically assign channels to a user based on detected changes in actual data transmissions. Thus, rules based on user activity level may be implemented to determine when a user is switched between channel groups. Essentially, the controller may effect switching of the users' upstream channels dynamically and intelligently on a packet-by-packet basis. Users may include modems and/or other terminal devices in a client-server or other data communication network.

Abstract translation: 用于多用户网络的介质访问控制器，其根据用户加载，用户状态和/或用户请求的或由控制器检测的有效载荷数据传输的类型来分配或改变多个上行信道的操作协议。 一组上行信道利用仅针对非响应或离线用户的争用协议，第二组对仅需要有效载荷数据的简短传输的用户使用有限类型的轮询协议，并且第三组利用详尽的轮询协议用户 需要大量的有效载荷数据传输。 有限类型的轮询提供低延迟以快速响应以适应多个用户，而穷举轮询以牺牲延迟为代价提供大的数据吞吐量。 可以采用附加级别的有限或详尽的轮询来适应更多种类的用户需求。 此外，信道本身可以基于用户负载和/或正在进行的数据传输的性质和特性在竞争和第一和/或其他级别轮询模式之间和之间动态地重新分类，以便实现共享资源的最大利用。 在启动数据传输之后，控制器还可以基于检测到的实际数据传输的变化来动态地向用户分配信道。 因此，可以实现基于用户活动级别的规则来确定用户何时在信道组之间切换。 基本上，控制器可以在逐个分组的基础上动态地和智能地实现用户的上游信道的切换。 用户可以在客户服务器或其他数据通信网络中包括调制解调器和/或其他终端设备。

公开(公告)号：US5933414A

公开(公告)日：1999-08-03

申请号：US738647

申请日：1996-10-29

Applicant: Leonidas Georgiadis ,  Roch A. Guerin ,  Vinod Gerard John Peris ,  Rajendran Rajan ,  Subir Varma

Inventor： Leonidas Georgiadis ,  Roch A. Guerin ,  Vinod Gerard John Peris ,  Rajendran Rajan ,  Subir Varma

IPC: H04L1/20 ,  H04L12/56 ,  H04Q11/04 ,  H04L5/22

CPC classification number: H04L1/205 ,  H04Q11/0478 ,  H04L2012/5649 ,  H04L2012/5652

Abstract: The present invention addresses the issue of controlling delay variations (jitter) in packet-switched networks by enhancing the capabilities of existing scheduling policies. The idea is to use a few bits in the header of packets to send jitter control information to the downstream network elements, so that the delay variation caused by the upstream network element, is compensated for by the downstream network element. The key point to observe is that packets (or cells in ATM) may be small, and therefore, not contain many bits in the header that can be used for jitter control. We describe a unique scheme, that utilizes the bits that are available for jitter control in an efficient manner, allowing for the desired jitter to be obtained with as few bits as possible.

Abstract translation: 本发明通过增强现有调度策略的能力来解决分组交换网络中的延迟变化（抖动）的控制问题。 想法是在报文头中使用几个比特来向下游网元发送抖动控制信息，从而使上游网元产生的延迟变化由下游网元补偿。 要观察的关键点是分组（或ATM中的小区）可能很小，因此在报头中不包含可用于抖动控制的多个位。 我们描述了一种独特的方案，它以有效的方式利用可用于抖动控制的位，从而允许以尽可能少的位获得所需的抖动。

公开(公告)号：US08750172B2

公开(公告)日：2014-06-10

申请号：US13218078

申请日：2011-08-25

Applicant: Subir Varma

Inventor： Subir Varma

IPC: H04L12/28 ,  H04W72/12 ,  H04J1/16

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.

Abstract translation: 点对多点无线通信，包括针对分组定向的点对多点通信的自动重传和错误恢复，其对使用无线通信的自动重传的参数进行自适应和动态响应。 无线通信链路被分为下游部分和上游部分。 为无线通信链路的下游部分和上游部分独立地选择参数进行自动重传。 BSC控制单元内所有CPE自动重发参数的选择。 作为其中BSC和CPE使用TDMA技术共享通信带宽的TDD帧的一部分，BSC包括其在TDD帧的控制部分内由CPE使用的自动重传参数的选择。 响应于与每个独立CPE的无线通信链路的条件，BSC动态地并且自适应地确定用于自动重传的新的所选择的参数。 BSC动态地并自适应地在TDD帧的上游部分内分配确认时隙，供每个选择的CPE使用。 当接收到消息但尚未确认时，BSC将上行带宽的一部分分配为共享资源，并将上游带宽的一部分分配为非共享。 BSC动态地并且自适应地响应来自每个选择的CPE的确认和非确认消息，以将自动重传协议与该帧中使用的TDD帧和TDMA技术集成。

公开(公告)号：US08717981B1

公开(公告)日：2014-05-06

申请号：US12113615

申请日：2008-05-01

Applicant: Subir Varma ,  George A. Georgiou ,  Durga Prasad Satapathy

Inventor： Subir Varma ,  George A. Georgiou ,  Durga Prasad Satapathy

IPC: H04W4/00 ,  H04M11/04 ,  H04W28/04 ,  H04W72/04 ,  H04W76/00

CPC classification number: H04W28/04 ,  H04W72/04 ,  H04W74/006 ,  H04W74/08

Abstract: A first set of uplink contention slots is allocated for use by a first set of devices. A second set of uplink contention slots is allocated for use by a second set of devices. The first set of uplink contention slots and the second set of uplink contention slots may or may not share contention slots. The first set of uplink contention slots is communicated to the first set of devices. The second set of uplink contention slots is communicated to the second set of devices.

Abstract translation: 第一组上行链路竞争时隙被分配供第一组设备使用。 第二组上行链路竞争时隙被分配供第二组设备使用。 第一组上行链路竞争时隙和第二组上行链路竞争时隙可以共享或不共享争用时隙。 第一组上行链路竞争时隙被传送到第一组设备。 第二组上行链路竞争时隙被传送到第二组设备。

公开(公告)号：US08520590B1

公开(公告)日：2013-08-27

申请号：US12248707

申请日：2008-10-09

Applicant: Subir Varma ,  Mohan R. Tammisetti

Inventor： Subir Varma ,  Mohan R. Tammisetti

IPC: G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J1/00 ,  H04J3/08 ,  H04L1/00 ,  H04B7/14 ,  H04W4/00

CPC classification number: H04W28/02 ,  H04L47/24

Abstract: A first service flow and a second service flow are combined into a backhaul service flow. One or more data structures within a first downlink frame are defined. The first downlink frame comprises an access region and a backhaul region. The one or more data structures are in the backhaul region. The one or more data structures are also defined within a second downlink frame. The second downlink frame comprises the access region and the backhaul region and the one or more data structures are in the backhaul region. The backhaul service flow is distributed into the one or more data structures. The first downlink frame and the second downlink frame are sent. The first downlink frame and the second downlink frame comprise an access map and a backhaul map. The access map has a size that is larger than the backhaul map.

Abstract translation: 第一服务流和第二服务流被组合成回程服务流。 定义第一下行链路帧内的一个或多个数据结构。 第一下行链路帧包括接入区域和回程区域。 一个或多个数据结构在回程区域中。 一个或多个数据结构也在第二下行链路帧内定义。 第二下行链路帧包括接入区域和回程区域，并且一个或多个数据结构在回程区域中。 回程业务流程被分配到一个或多个数据结构中。 发送第一下行链路帧和第二下行链路帧。 第一下行链路帧和第二下行链路帧包括接入映射和回程映射。 访问地图的大小大于回程地图。

公开(公告)号：US08515444B1

公开(公告)日：2013-08-20

申请号：US12175696

申请日：2008-07-18

Applicant: Subir Varma ,  Durga Prasad Satapathy

Inventor： Subir Varma ,  Durga Prasad Satapathy

IPC: H04W72/00 ,  H04B7/00

CPC classification number: H04W72/1263 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0028 ,  H04L1/1867

Abstract: A signal quality feedback slot is periodically allocated to a wireless device in one out of every En frames. The variable n is greater than or equal to zero and less than Nmax. The variable E is an integer greater than one. The variable n is increased if an indicator of RF conditions satisfies a first criteria. The variable n is decreased to a minimum value if a plurality of retry requests from the wireless device satisfy a retry criteria.

Abstract translation: 在每个En帧中的一个中，信号质量反馈时隙被周期性地分配给无线设备。 变量n大于或等于零且小于Nmax。 变量E是大于1的整数。 如果RF条件的指标满足第一准则，则变量n增加。 如果来自无线设备的多个重试请求满足重试标准，则将变量n减小到最小值。

公开(公告)号：US08274991B2

公开(公告)日：2012-09-25

申请号：US11703065

申请日：2007-02-06

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.

Abstract translation: 一种用于在点对多点通信中控制基站控制器和客户驻地设备之间的通信链路的争用状态的系统。 使用状态机来控制竞争状态，该状态机包括待保持状态，其中单播请求时隙保持打开以供客户驻地设备使用。 在待机待命状态期间，客户驻地设备不向基站控制器发送上行数据，但可以使用单播请求时隙来请求向基站控制器发送上行数据的数据时隙。 在授权等待状态下，客户端设备优选地使用捎带来向基站控制器发送上行数据来请求下一个数据时隙的授权。

公开(公告)号：US08023420B2

公开(公告)日：2011-09-20

申请号：US11412412

申请日：2006-04-26

Applicant: Subir Varma

Inventor： Subir Varma

IPC: H04L12/56 ,  H04J1/16

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.

Abstract translation: 点对多点无线通信，包括针对分组定向的点对多点通信的自动重传和错误恢复，其对使用无线通信的自动重传的参数进行自适应和动态响应。 无线通信链路被分为下游部分和上游部分。 为无线通信链路的下游部分和上游部分独立地选择参数进行自动重传。 BSC控制单元内所有CPE自动重发参数的选择。 作为其中BSC和CPE使用TDMA技术共享通信带宽的TDD帧的一部分，BSC包括其在TDD帧的控制部分内由CPE使用的自动重传参数的选择。 响应于与每个独立CPE的无线通信链路的条件，BSC动态地并且自适应地确定用于自动重传的新的所选择的参数。 BSC动态地并自适应地在TDD帧的上游部分内分配确认时隙，供每个选择的CPE使用。 当接收到消息但尚未确认时，BSC将上行带宽的一部分分配为共享资源，并将上游带宽的一部分分配为非共享。 BSC动态地并且自适应地响应来自每个选择的CPE的确认和非确认消息，以将自动重传协议与该帧中使用的TDD帧和TDMA技术集成。