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1.发明授权Apparatus and method for adaptive forward error correction in data communications 失效数据通信中自适应前向纠错的装置和方法
公开(公告)号：US5699365A
公开(公告)日：1997-12-16
申请号：US625409
申请日：1996-03-27
CPC分类号： H04L1/0021 , H03M13/35 , H04L1/0009 , H04L1/0025
摘要： An apparatus (101, 110) and method for adaptive forward error correction in a data communication system (100) provides for dynamically changing forward error correction parameters based upon communication channel conditions, such as noise levels or error rates. In the method embodiment of the invention, data having a current degree of forward error correction is received (305), and a channel parameter is monitored (310), such as packet or bit error rates. A threshold level for the channel parameter is determined (315), and the monitored channel parameter is compared to the threshold level (320). When the channel parameter is not within a predetermined or adaptive variance of the threshold level, a revised forward error correction parameter having a greater or lesser degree of forward error correction capability is selected (330, 340, 350, 360), and the revised forward error correction parameter is transmitted (370). The device receiving the revised forward error correction parameter, such as a secondary station (110), then transmits data encoded utilizing the revised error correction parameter (425).
摘要翻译： 在数据通信系统（100）中用于自适应前向纠错的装置（101,110）和方法提供了基于通信信道条件（诸如噪声电平或错误率）动态地改变前向纠错参数。 在本发明的方法实施例中，接收具有当前程度的前向纠错的数据（305），并监视信道参数（310），诸如分组或误码率。 确定通道参数的阈值水平（315），并将所监视的通道参数与阈值水平进行比较（320）。 当信道参数不在阈值水平的预定或自适应方差内时，选择具有更大或更小程度的前向纠错能力的经修正的前向纠错参数（330,340,350,360），并修改前向 发送错误校正参数（370）。 接收经修正的前向纠错参数（例如次站（110））的设备然后发送利用经修正的纠错参数（425）编码的数据。
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2.发明授权System and method for hybrid contention/polling protocol collison resolution used backoff timers with polling 失效用于混合竞争/轮询协议的分解解决方案的系统和方法使用轮回的退避计时器
公开(公告)号：US5684802A
公开(公告)日：1997-11-04
申请号：US434334
申请日：1995-05-02
IPC分类号： H04L12/403 , H04L12/413
CPC分类号： H04L12/413 , H04L12/403
摘要： The system and method provide for efficiently resolving collisions in an environment where a transmitting device cannot hear collisions without a headend control station/control device, i.e., master, repeating transmission of all upstream frames in the downstream direction. This invention also prevents additional collisions from occurring between a device that is retransmitting and a device that is transmitting a packet for the first time. Further, the present invention allows continued utilization of a channel by other devices while contending devices are processing collision resolution procedures.
摘要翻译： 该系统和方法提供了在没有头端控制站/控制设备（即主站）在下游方向重复所有上游帧的传输的情况下，有效地解决发送设备听不到冲突的环境中的冲突。 本发明还防止在重传的设备和正在第一次发送分组的设备之间发生额外的冲突。 此外，本发明允许在竞争的设备正在处理冲突解决过程时由其他设备继续使用信道。
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3.发明授权Method and system for providing access by secondary stations to a shared transmission medium 失效用于提供从站到共享传输介质的访问的方法和系统
公开(公告)号：US5596577A
公开(公告)日：1997-01-21
申请号：US433905
申请日：1995-05-02
IPC分类号： H04L12/403 , H04Q9/00
CPC分类号： H04L12/40013 , H04L12/40163 , H04L12/403
摘要： A method for providing access by secondary stations (12, 14, 16) to a shared transmission medium, maintains a list of secondary stations (12, 14, 16). A poll is transmitted poll by a primary station (10) to one of the secondary stations (12, 14, 16). The secondary station (12, 14, 16) waits for a poll, examines the transmission allocation, determines if there is congestion and transmits, along with the data in response to the poll, information regarding congestion. A system for providing such access includes a primary station (10) and a plurality of secondary stations (12, 14, 16). The primary station includes a polling controller (30), a receiver (32), a transmitter (34), a summer (36), a secondary station poll list database (38) and a data traffic controller (40).
摘要翻译： 一种用于向次级站（12,14,16）提供到共享传输介质的访问的方法，保持次站列表（12,14,16）。 轮询通过主站（10）向其中一个次站（12,14,16）进行轮询。 次站（12,14,16）等待轮询，检查传输分配，确定是否存在拥塞并且响应于轮询的数据发送与拥塞有关的信息。 用于提供这种访问的系统包括主站（10）和多个次站（12,14,16）。 主站包括轮询控制器（30），接收器（32），发射机（34），加法器（36），次站轮询列表数据库（38）和数据业务控制器（40）。
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4.发明授权System for determining the frequency of repetitions of polling active stations relative to the polling of inactive stations 失效用于确定轮询主动站相对于非活动站的轮询的重复频率的系统
公开(公告)号：US6006017A
公开(公告)日：1999-12-21
申请号：US432749
申请日：1995-05-02
IPC分类号： H04L12/403 , G06F13/00
CPC分类号： H04L12/4035
摘要： An apparatus and method to implement a hybrid contention and polling protocol for a communications or computer network is disclosed. Various apparatus and method embodiments of the invention employ specific polls from a primary station for polling identified secondary stations of the network which may be in an active state, general polls to any of a plurality of secondary stations of the network which may be in an unresponsive state to initiate contention access to the network, and general polls for collision resolution in the event that a plurality of secondary stations may simultaneously contend for network access. Various embodiments may also include frequency channel allocation for transmission and reception of data and other information within the network. The various procedures and apparatus disclosed may also be used to apply various polling parameters to optimize network performance.
摘要翻译： 公开了一种用于实现通信或计算机网络的混合争用和轮询协议的装置和方法。 本发明的各种装置和方法实施例使用来自主站的特定轮询来轮询可能处于活动状态的所述网络的所识别的次站，对所述网络的多个次站中的任何一个可能处于无响应的次站 状态来发起对网络的争用访问，以及在多个次站可以同时争用网络访问的情况下的冲突解决的一般轮询。 各种实施例还可以包括用于数据和网络内的其他信息的发送和接收的频率信道分配。 所公开的各种程序和装置也可以用于应用各种轮询参数来优化网络性能。
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公开(公告)号：US5805586A
公开(公告)日：1998-09-08
申请号：US433877
申请日：1995-05-02
IPC分类号： H04L12/403 , H04L12/56
CPC分类号： H04L12/403
摘要： A control station (8) is coupled to a plurality of tributary devices (20, 16, 18) by way of at least one high speed broadcast downstream data channel and more than one shared lower speed upstream data channels. The control station (8) broadcasts data to all the tributary devices (20, 16, 18) and selects a channel for a specific tributary device (20, 16, 18) to respond to a poll. After polling, the tributary device (20, 16, 18) changes the tributary device transmitter (42) to the frequency of the selected channel. The tributary device (20, 16, 18) either sends data to send to the control station (8) or sends a negative acknowledge to the control station (8). If a negative acknowledgment was transmitted, the control station (8) notifies the control station transmitter that the channel is idle.
摘要翻译： 控制站（8）通过至少一个高速广播下游数据信道和多于一个共享的较低速上行数据信道而耦合到多个支路设备（20,16,18）。 控制站（8）向所有辅助设备（20,16,18）广播数据，并且选择用于特定辅助设备（20,16,18）的通道以响应轮询。 在轮询之后，辅助设备（20,16,18）将辅助设备发射机（42）改变到所选频道的频率。 支流装置（20,16,18）发送数据以发送到控制站（8）或向控制站（8）发送否定确认。 如果发送否定确认，则控制站（8）向控制站发送器通知该信道是空闲的。
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公开(公告)号：US6114968A
公开(公告)日：2000-09-05
申请号：US883972
申请日：1997-06-27
IPC分类号： H04Q9/00
CPC分类号： H04L12/403 , H04L12/2801 , H04L12/2861
摘要： A system, device, and method for improving access in a hybrid contention/polling protocol maintains a list of active users, a list of recently active users, and a list of inactive users. An active user that becomes inactive is moved into the list of recently active users, and a recently active user that remains inactive is moved into the list of inactive users. A limited contention poll addressed to a number of inactive users and at least one recently active user authorizes any of the addressed users to contend for access to the shared channel. Upon detection of a collision, addressed users that are in the list of recently active users are polled individually, while the inactive users are sent a collision resolution poll which forces the inactive users to contend again for access. Users that become active are moved into the list of active users.
摘要翻译： 用于改进混合竞争/轮询协议中的访问的系统，设备和方法维护活动用户的列表，最近活动用户的列表以及不活动用户的列表。 变为不活动的活动用户被移动到最近活动的用户的列表中，并且保持不活动的最近活动的用户被移动到非活动用户的列表中。 针对多个非活动用户和至少一个最近活动的用户的有限争用轮询授权任何被寻址的用户争取访问共享信道。 在检测到冲突时，单独轮询处于最近活动用户列表中的寻址用户，而非活动用户被发送冲突解决轮询，迫使非活动用户再次争取访问。 成为活动用户将被移动到活动用户列表中。
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7.发明授权
公开(公告)号：US5793307A
公开(公告)日：1998-08-11
申请号：US437106
申请日：1995-05-05
IPC分类号： H04L12/403 , G05B23/00
CPC分类号： H04L12/4035
摘要： An apparatus and method to implement a hybrid contention and polling protocol for a communications or computer network is disclosed. Various apparatus and method embodiments of the invention employ specific polls from a primary station for polling identified secondary stations of the network which may be in an active state; limited contention polls to an identified individual secondary station which may be in an idle state or to an identified subset of a plurality of secondary stations which may be in an idle state to initiate limited contention access to the network; limited contention polls for collision resolution in the event that a plurality of secondary stations in an idle state may have simultaneously contended for network access; general polls to any of a plurality of secondary stations of the network which may be in an unresponsive state to initiate contention access to the network; and general polls for collision resolution in the event that a plurality of secondary stations may simultaneously contend for network access. Various embodiments may also include frequency channel allocation for transmission and reception of data and other information within the network.
摘要翻译： 公开了一种用于实现通信或计算机网络的混合争用和轮询协议的装置和方法。 本发明的各种装置和方法实施例使用来自主站的特定轮询来轮询可能处于活动状态的网络的所识别的次站; 有限争用轮询到可能处于空闲状态的识别的个人次站或者可能处于空闲状态以发起对网络的有限争用访问的多个次站的已识别子集; 在空闲状态下的多个次站可能同时争夺网络访问的情况下，进行冲突解决的有限争用轮询; 一般轮询到可能处于无响应状态的网络的多个次站中的任何一个以发起对网络的竞争接入; 以及在多个次站可以同时竞争网络访问的情况下的冲突解决的一般轮询。 各种实施例还可以包括用于数据和网络内的其他信息的发送和接收的频率信道分配。
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8.发明授权System and method for hybrid contention/polling protocol collision resolution using a depth first search technique 失效使用深度优先搜索技术的混合竞争/轮询协议冲突解决的系统和方法
公开(公告)号：US5651009A
公开(公告)日：1997-07-22
申请号：US433876
申请日：1995-05-02
IPC分类号： H04L12/403 , H04L12/413
CPC分类号： H04L12/413 , H04L12/403
摘要： A method and system provide efficient resolution of transmission collisions in a simultaneous channel access communication environment. At least a first Master device and a plurality of Slave devices utilize the steps of: (1) transmitting, by the plurality of Slave devices upon receiving a contention poll from the first Master device, information to the Master device, wherein transmissions of the Slave devices provide a collision; (2) selecting a subset of Slaves allowed to retransmit following the collision, by the first Master device using a collision resolution poll in accordance with a predetermined depth first tree search technique; and (3) retransmitting, by the subset of Slave devices, the information to the Master device, and, where another collision is obtained, recycling to step 2 and repeating steps 2 and 3 until all collisions are resolved.
摘要翻译： 一种方法和系统在同时的信道接入通信环境中提供传输冲突的有效分辨率。 至少第一主设备和多个从设备利用以下步骤：（1）在从第一主设备接收到竞争轮询时，由多个从设备发送到主设备的信息，其中从设备的传输 设备提供冲突; （2）根据预定的深度第一树搜索技术，通过第一主设备使用冲突解决轮询来选择允许在冲突之后重传的从站的子集; 并且（3）由Slave设备的子集重新发送到主设备的信息，并且在获得另一个冲突的情况下再循环到步骤2并重复步骤2和3，直到所有的冲突被解决为止。
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9.发明授权Apparatus and method for providing optimal adaptive forward error correction in data communications 有权用于在数据通信中提供最佳自适应前向纠错的装置和方法公开(公告)号：US06772388B2
公开(公告)日：2004-08-03
申请号：US09731095
申请日：2000-12-06
IPC分类号： H03M1335
CPC分类号： H04L12/2801 , H03M13/35
摘要： An adaptive and dynamic forward error correction scheme for a communication channel is disclosed. The method and apparatus calculates the actual bit error rate for comparison with a target bit error rate. When a channel is performing better than required by the performance specifications, the forward error correction power can be reduced to provide greater throughput. If the calculated actual bit error rate is greater than the target bit error rate, then the forward error correction power is increased in an attempt to lower the calculated bit error rate. A feedback loop is employed to continually calculate revised bit error rates as the forward error correction power is increased or decreased.
摘要翻译： 公开了一种用于通信信道的自适应和动态前向纠错方案。 该方法和装置计算与目标比特误码率进行比较的实际比特误码率。 当频道的性能比性能规格要求更好时，可以减少前向纠错功率以提供更大的吞吐量。 如果计算出的实际误码率大于目标比特误码率，则增加前向纠错功率以试图降低计算的误比特率。 当前向纠错功率增加或减小时，采用反馈回路来连续计算修正的误码率。
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公开(公告)号：US20050078880A1
公开(公告)日：2005-04-14
申请号：US10684295
申请日：2003-10-10
申请人： Stephen Schroeder
发明人： Stephen Schroeder
CPC分类号： G06T3/0081 , G06T7/32
摘要： Methods and machine-readable mediums are disclosed for warping overlapping images. In one embodiment, the method comprises selecting a first set of points in a first image that are located in an overlap region of the first image and the second image, determining a set of tie points in the second image, each tie point correlating to a point in the first set, determining a second set of points, each point in the second set located at a position in the overlap region between a point in the first set and a tie point correlated to the point in the first set, and warping the first image and the second image by applying an algorithm using the second set of points, the algorithm to reposition at least a portion of the points in the first image and at least a portion of the points in the second image.
摘要翻译： 公开了用于扭曲重叠图像的方法和机器可读介质。 在一个实施例中，该方法包括选择位于第一图像和第二图像的重叠区域中的第一图像中的第一组点，确定第二图像中的一组连接点，每个连接点与 在第一组中确定第二组点，第二组中的每个点位于第一组中的点与第一组中的点相关联的连接点之间的重叠区域中的位置，并且使 第一图像和第二图像通过使用第二组点应用算法，所述算法重新定位第一图像中的点的至少一部分和第二图像中的点的至少一部分。
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