公开(公告)号：US5621773A

公开(公告)日：1997-04-15

申请号：US611327

申请日：1996-03-08

申请人： Subir Varma ,  Thomas Daniel ,  Dieter Nattkemper

发明人： Subir Varma ,  Thomas Daniel ,  Dieter Nattkemper

IPC分类号： H04J3/06 ,  H04L7/00

CPC分类号： H04J3/0608

摘要： A T1 digital PCM signal frame synchronizer includes a RAM memory for storing a complete extended superframe of received data, a pattern detector for detecting patterns in the memory that match a predetermined frame alignment signal, and a plurality of address pointer registers and associated counters. A given address within the RAM corresponds to a particular bit position within the received data. The first time that a pattern is detected at a given address within memory, that address is stored into a register, and its associated counter set to one. Subsequent pattern matches and violations at that address cause the counter to increment and decrement, respectively. A register whose counter value decrements down to zero becomes available for storing a new address. In-sync is declared when any counter exceeds an in-sync threshold. Out-of-sync is declared when that counter falls to an out-of-sync threshold or below. The synchronizer continues to search for alternative candidates even after synchronization is declared. When the number of registers provided is limited, initial synchronization speed is increased by storing the address for only every other pattern match for the first three extended superframes of received data, thus ensuring that the pattern matches initially recorded will be more evenly distributed throughout the extended superframe of received data.

摘要翻译： T1数字PCM信号帧同步器包括用于存储接收数据的完整扩展超帧的RAM存储器，用于检测与预定帧对准信号匹配的存储器中的图案的模式检测器，以及多个地址指针寄存器和相关联的计数器。 RAM内的给定地址对应于接收数据内的特定位位置。 第一次在存储器内的给定地址处检测到模式，该地址被存储到寄存器中，并且其相关联的计数器设置为1。 在该地址的后续模式匹配和违规会导致计数器分别递增和递减。 计数器值递减到零的寄存器可用于存储新地址。 当任何计数器超过同步阈值时，同步声明。 当该计数器下降到不同步阈值以下时，将声明不同步。 即使在同步声明之后，同步器继续搜索替代候选。 当提供的寄存器数量有限时，通过仅存储接收数据的前三个扩展超帧的每隔一个模式匹配的地址来增加初始同步速度，从而确保最初记录的模式匹配将更均匀地分布在整个扩展 接收数据的超帧。

公开(公告)号：US08750172B2

公开(公告)日：2014-06-10

申请号：US13218078

申请日：2011-08-25

申请人： Subir Varma

发明人： Subir Varma

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

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

摘要： 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.

摘要翻译： 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

申请人： Subir Varma ,  George A. Georgiou ,  Durga Prasad Satapathy

发明人： Subir Varma ,  George A. Georgiou ,  Durga Prasad Satapathy

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

CPC分类号： H04W28/04 ,  H04W72/04 ,  H04W74/006 ,  H04W74/08

摘要： 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.

摘要翻译： 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

申请人： Subir Varma ,  Mohan R. Tammisetti

发明人： Subir Varma ,  Mohan R. Tammisetti

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

CPC分类号： H04W28/02 ,  H04L47/24

摘要： 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.

摘要翻译： 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

申请人： Subir Varma ,  Durga Prasad Satapathy

发明人： Subir Varma ,  Durga Prasad Satapathy

IPC分类号： H04W72/00 ,  H04B7/00

CPC分类号： H04W72/1263 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/0027 ,  H04L1/0028 ,  H04L1/1867

摘要： 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.

摘要翻译： 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

申请人： Subir Varma

发明人： Subir Varma

IPC分类号： H04L12/413

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

摘要： 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.

摘要翻译： 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

申请人： Subir Varma

发明人： Subir Varma

IPC分类号： H04L12/56 ,  H04J1/16

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

摘要： 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.

摘要翻译： 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：US20110038325A1

公开(公告)日：2011-02-17

申请号：US12540916

申请日：2009-08-13

申请人： Subir Varma

发明人： Subir Varma

IPC分类号： H04W72/12

CPC分类号： H04W72/1226

摘要： A method and system of operating a communication system to schedule packets is provided. In part, if a first application has a first minimum rate guarantee, a first weight is assigned to a first packet based on the first minimum rate guarantee. If the second application has a second minimum rate guarantee, then a second weight is assigned to a second packet based on the second minimum rate guarantee. A first channel performance indicator is determined based on how a first channel is performing compared to a first channel condition history and a second channel performance indicator is determined based on how a second channel is performing compared to a second channel condition history. Furthermore, the method comprises scheduling the first and second packets based on the first and second weights and on the first and second channel performance indicators.

摘要翻译： 提供了一种操作通信系统以调度分组的方法和系统。 部分地，如果第一应用具有第一最小速率保证，则基于第一最小速率保证将第一权重分配给第一分组。 如果第二应用具有第二最小速率保证，则基于第二最小速率保证将第二加权分配给第二分组。 基于第一信道如何执行与第一信道条件历史相比的第一信道性能指示符，并且基于第二信道的执行方式与第二信道条件历史相比，确定第二信道性能指示符。 此外，该方法包括基于第一和第二权重以及第一和第二信道性能指示符来调度第一和第二分组。

公开(公告)号：US20100232390A1

公开(公告)日：2010-09-16

申请号：US12403542

申请日：2009-03-13

申请人： Subir Varma ,  Saied Kazeminejad

发明人： Subir Varma ,  Saied Kazeminejad

IPC分类号： H04W28/08 ,  H04W36/00

CPC分类号： H04W72/0486

摘要： A method of operating a communication system is disclosed. A first set of wireless devices is communicated with using a first frequency range. A second set of wireless devices is communicated with using a second frequency range. A first air-interface utilization associated with the first frequency range is determined. The first air-interface utilization is determined to satisfy a criteria. A second air-interface utilization associated with the second frequency range is determined. A subset of the first set of wireless devices is selected. The subset is selected to have a total air interface utilization that exceeds one-half of the difference between the first air-interface utilization and the second air-interface utilization. The subset of wireless devices is controlled to use the second frequency range.

摘要翻译： 公开了一种操作通信系统的方法。 使用第一频率范围来传送第一组无线设备。 使用第二频率范围来传送第二组无线设备。 确定与第一频率范围相关联的第一空中接口利用。 确定第一空中接口利用率以满足标准。 确定与第二频率范围相关联的第二空中接口利用。 选择第一组无线设备的子集。 该子集被选择为具有超过第一空中接口利用率和第二空中接口利用率之差差的一半的总空中接口利用率。 控制无线设备的子集以使用第二频率范围。

公开(公告)号：US06992986B2

公开(公告)日：2006-01-31

申请号：US10719891

申请日：2003-11-21

申请人： Majidi-Ahy Reza ,  Joseph Hakim ,  Subir Varma

发明人： Majidi-Ahy Reza ,  Joseph Hakim ,  Subir Varma

IPC分类号： G01R31/08

CPC分类号： 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

摘要： 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.