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公开(公告)号：US20120039173A1
公开(公告)日：2012-02-16
申请号：US13028717
申请日：2011-02-16
IPC分类号： H04L12/26
CPC分类号： H04L47/2441 , H04L12/2801 , H04L45/00 , H04L47/10 , H04L47/263 , H04L47/30 , H04L47/52 , H04L69/14 , Y02D50/10 , Y02D50/30
摘要： A method, system and computer program product in a downstream line card of a Cable Modem Termination System (CMTS) for managing downstream traffic for channels and bonded channel groups is provided herein. The method comprises the step of receiving packets for transmission to cable modems and classifying each packet to a flow based on class of service associated with the packet. The method further includes the step of storing the packets in flow queues based, wherein a flow queue is selected based on a flow a packet is associated with and wherein each flow corresponds to a single flow queue. The method also includes transmitting the packets from the flow queues to channel queues or bonded channel queues using corresponding channel nodes or bonded channel nodes at a rate that is determined based on feedback data and scheduling downstream transmission of packets on a single downstream channel if the packet is stored in a channel queue and on multiple downstream channels that are bonded together to form a bonded channel group if the packet is stored in a bonded channel queue. The feedback data is adjusted for each channel node or bonded channel node based on a queue depth for a corresponding channel queue or bonded channel queue.
摘要翻译： 本文提供了用于管理信道和绑定信道组的下行业务的有线调制解调器终端系统（CMTS）下游线路卡中的方法，系统和计算机程序产品。 该方法包括以下步骤：接收用于传输到电缆调制解调器的分组，并且基于与分组相关联的服务类别将每个分组分类为流。 该方法还包括基于流队列存储分组的步骤，其中基于分组与其相关联的流程选择流队列，并且其中每个流对应于单个流队列。 该方法还包括：使用对应的信道节点或绑定信道节点，将数据包从流队列发送到通道队列或绑定信道队列，速率是基于反馈数据确定的，并且调度单个下行信道上的分组的下行传输，如果分组 如果分组被存储在绑定信道队列中，则被存储在通道队列中以及多个下行信道上，所述多个下行信道被绑定在一起以形成绑定信道组。 基于对应的信道队列或绑定信道队列的队列深度，为每个信道节点或绑定信道节点调整反馈数据。
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公开(公告)号：US5349606A
公开(公告)日：1994-09-20
申请号：US999507
申请日：1992-12-31
CPC分类号： H04B7/005 , H04B1/707 , H04B1/1081 , H04B1/709
摘要： Circuit for recovery of a plurality of multipath direct sequence spread spectrum signal components received over a time span, wherein the multipath signal components are components of a signal generated from digital data comprised of data bits at a data bit rate modulated by a pseudo-noise code, consisting of a sequence of chips having a chip rate greater than the data bit rate, wherein the sequence of chips is a code repetition period equal or greater than the received time span of the multipath signal components. A plurality of correlators is provided. Each correlator has a first input for coupling to the multipath signal components, a second input, and an output. A pseudo-noise code generator generates a duplicate of the pseudo-noise code. A time delayer is coupled between the second inputs of a mulitiplicity of the correlators and the pseudo-noise code generator for delaying the duplicate of the pseudo-noise code by a multiple of a time delay equal to the time of a chip duration or less. A signal combiner is coupled to the plurality of phase correcting devices.
摘要翻译： 用于恢复在时间跨度上接收的多个多径直接序列扩展频谱信号分量的电路，其中所述多径信号分量是从由伪噪声码调制的数据比特率的数据位组成的数字数据产生的信号的分量 由码片速率大于数据比特率的码片序列组成，其中码片序列是等于或大于多路径信号分量的接收时间间隔的码重复周期。 提供了多个相关器。 每个相关器具有用于耦合到多路径信号分量的第一输入端，第二输入端和输出端。 伪噪声码发生器产生伪噪声码的副本。 时间延迟器耦合在相关器的多重性的第二输入端和伪噪声码发生器之间，用于将伪噪声码的副本延迟等于码片持续时间或更短时间的时间延迟的倍数。 信号组合器耦合到多个相位校正装置。
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公开(公告)号：US5313490A
公开(公告)日：1994-05-17
申请号：US999643
申请日：1992-12-31
IPC分类号： H04B1/7077 , H04L27/30
CPC分类号： H04B1/7077
摘要： Apparatus for indicating the end of an acquisition procedure between a transmitter and receiver in a direct sequence spread spectrum communications system. A transmitter generates a first acquisition code having a first acquisition code period and comprised of digital bits at a first bit rate. A circuit modulates the first digital acquisition code by a pseudo-noise code repeating at a pseudo-noise code period and consisting of a sequence of chips at a chip rate greater than the first bit rate. The first acquisition code period is an integer multiple of the pseudo-noise code period. A circuit modulates a carrier by the first digital acquisition code modulated by the pseudo-noise code. The carrier modulated by said first digital acquisition code modulated by said pseudo-noise code is transmitted for a first period of time. A circuit synchronizes a receiver to the chip rate and carrier frequency. A circuit synchronizes the receiver to the pseudo-noise code period. A circuit synchronizes the receiver to the period of the data bit rate. A circuit synchronizes the receiver to the first acquisition code period. The transmitter generates a second acquisition code having a second acquisition code period and comprised of digital bits at a second bit rate, the second bit rate equal to the bit rate of the first acquisition code period. A circuit modulates the second digital acquisition code by the pseudo-noise code. A circuit modulates the carrier by the second digital acquisition code modulated by the pseudo-noise code. A circuit transmits for a second period of time equal to the second acquisition code period the carrier modulated by the second acquisition code modulated by the pseudo-noise code. A circuit synchronizes the receiver to the second acquisition code, the end of the second acquisition code indicates the end of the acquisition procedure.
摘要翻译： 用于在直接序列扩频通信系统中指示发射机和接收机之间的采集过程结束的装置。 发射机产生具有第一采集码周期的第一采集码，并以第一比特率包括数字比特。 电路通过在伪噪声码周期重复的伪噪声码来对第一数字采集码进行调制，并以大于第一位速率的码片速率的码片序列组成。 第一采集码周期是伪噪声码周期的整数倍。 电路通过由伪噪声码调制的第一数字采集码来调制载波。 由所述伪噪声码调制的所述第一数字采集码调制的载波被传送第一时间段。 电路将接收机同步到码片速率和载波频率。 电路使接收机同步到伪噪声码周期。 电路将接收机同步到数据比特率的周期。 电路将接收器同步到第一采集码周期。 发射机产生具有第二捕获码周期的第二捕获码，并且以第二比特率包括数字比特，第二比特率等于第一捕获码周期的比特率。 电路通过伪噪声码对第二数字采集码进行调制。 电路通过由伪噪声码调制的第二数字采集码对载波进行调制。 电路通过由伪噪声码调制的第二采集码调制的载波传输等于第二采集码周期的第二时间段。 电路将接收器同步到第二采集代码，第二采集代码的结束指示采集过程的结束。
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4.发明授权Apparatus and method for controlling queuing of data at a node on a network 失效用于控制网络上的节点上的数据排队的装置和方法公开(公告)号：US07016302B1
公开(公告)日：2006-03-21
申请号：US09640349
申请日：2000-08-16
CPC分类号： H04L12/5602 , H04L47/10 , H04L2012/5651 , H04L2012/5679
摘要： An approach to queuing data at a network switching node includes assigning a queue value such as a priority value or a weight to each of a plurality of queues which temporarily store data packets to be forwarded toward a link on the network. A bandwidth value related to a maximum amount of data to be transferred on the link is defined. A data limit value is assigned to each of the queues to limit the amount of data that can be forwarded from each queue. The data limit value is derived from the bandwidth value for the link. By placing bandwidth-related limits on the queues, low-priority queues are prevented from being dominated by high-priority queues, that is, low-priority queues are not prevented from forwarding their data by the priority structure. Also, the bandwidth-related limits allow for control of traffic flow to prevent overloading lower-capacity links on the network.
摘要翻译： 在网络交换节点处排队数据的方法包括：将临时存储要转发到网络上的链路的数据分组的多个队列中的每一个分配诸如优先级值或权重的队列值。 定义与在链路上传送的最大数据量有关的带宽值。 数据限制值被分配给每个队列以限制可以从每个队列转发的数据量。 数据限制值是从链路的带宽值导出的。 通过对队列配置带宽相关的限制，可以防止低优先级队列被高优先级队列控制，即低优先级队列不会通过优先级结构转发数据。 此外，带宽相关限制允许控制流量，以防止网络上的较低容量链路过载。
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公开(公告)号：US5313491A
公开(公告)日：1994-05-17
申请号：US999242
申请日：1992-12-31
IPC分类号： H04B1/7075 , H04L27/30
CPC分类号： H04B1/70757
摘要： Method for indicating the end of an acquisition procedure between a transmitter and receiver in a direct sequence spread spectrum communications system. At a transmitter, a first acquisition code having a first acquisition code period and comprised of digital bits at a first bit rate is generated. The first digital acquisition code is modulated by a pseudo-noise code repeating at a pseudo-noise code period and consisting of a sequence of chips at a chip rate greater than the first bit rate, and wherein the first acquisition code period is an integer multiple of the pseudo-noise code period. A carrier frequency is modulated by the first digital acquisition code modulated by the pseudo-noise code. The carrier is modulated by the first digital acquisition code modulated by the pseudo-noise code is transmitted for a first period of time. A receiver is synchronized to the chip rate and carrier frequency, then to the pseudo-noise code period, next to the period of the data bit rate, and then to the first acquisition code period. At the transmitter a second acquisition code is generated having a second acquisition code period and comprised of digital bits at a second bit rate, the second bit rate equal to the bit rate of the first acquisition code period. The second digital acquisition code is modulated by the pseudo-noise code. The carrier frequency is modulated by the second digital acquisition code modulated by the pseudo-noise code. The carrier modulated by the second acquisition code modulated by the pseudo-noise code is transmitted for a second period of time equal to the second acquisition code period. The receiver is sychronized to the second acquisition code, the end of the second acquisition code indicating the end of the acquisition procedure.
摘要翻译： 用于在直接序列扩频通信系统中指示发射机和接收机之间的获取过程结束的方法。 在发射机处，产生具有第一采集码周期并且以第一比特率包括数字位的第一采集码。 第一数字采集码由在伪噪声码周期重复的伪噪声码进行调制，并且以大于第一比特率的码片速率的码片序列组成，并且其中第一采集码周期是整数倍 的伪噪声码周期。 载波频率由被伪噪声码调制的第一数字采集码调制。 通过由伪噪声码调制的第一数字采集码在第一时间段内发送载波进行调制。 接收机与芯片速率和载波频率同步，然后与数据比特率周期之后的伪噪声码周期同步，然后到第一采集码周期。 在发射机处，生成第二采集码，其具有第二采集码周期，并且以第二比特率包括数字比特，第二比特率等于第一采集码周期的比特率。 第二数字采集码由伪噪声码调制。 载波频率由被伪噪声码调制的第二数字采集码调制。 由伪噪声码调制的第二采集码调制的载波被传输等于第二采集码周期的第二时间段。 接收器与第二采集代码同步，第二采集代码的结束指示采集过程的结束。
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公开(公告)号：US08923131B2
公开(公告)日：2014-12-30
申请号：US13028717
申请日：2011-02-16
IPC分类号： H04L12/26 , H04L12/28 , H04L12/701 , H04L12/801 , H04L12/851 , H04L12/825 , H04L12/835 , H04L29/06
CPC分类号： H04L47/2441 , H04L12/2801 , H04L45/00 , H04L47/10 , H04L47/263 , H04L47/30 , H04L47/52 , H04L69/14 , Y02D50/10 , Y02D50/30
摘要： A method, system and computer program product in a downstream line card of a Cable Modem Termination System (CMTS) for managing downstream traffic for channels and bonded channel groups is provided herein. The method comprises the step of receiving packets for transmission to cable modems and classifying each packet to a flow based on class of service associated with the packet. The method further includes the step of storing the packets in flow queues based, wherein a flow queue is selected based on a flow a packet is associated with and wherein each flow corresponds to a single flow queue. The method also includes transmitting the packets from the flow queues to channel queues or bonded channel queues using corresponding channel nodes or bonded channel nodes at a rate that is determined based on feedback data and scheduling downstream transmission of packets on a single downstream channel if the packet is stored in a channel queue and on multiple downstream channels that are bonded together to form a bonded channel group if the packet is stored in a bonded channel queue. The feedback data is adjusted for each channel node or bonded channel node based on a queue depth for a corresponding channel queue or bonded channel queue.
摘要翻译： 本文提供了用于管理信道和绑定信道组的下行业务的有线调制解调器终端系统（CMTS）下游线路卡中的方法，系统和计算机程序产品。 该方法包括以下步骤：接收用于传输到电缆调制解调器的分组，并且基于与分组相关联的服务类别将每个分组分类为流。 该方法还包括基于流队列存储分组的步骤，其中基于分组与其相关联的流程选择流队列，并且其中每个流对应于单个流队列。 该方法还包括：使用对应的信道节点或绑定信道节点，将数据包从流队列发送到通道队列或绑定信道队列，速率是基于反馈数据确定的，并且调度单个下行信道上的分组的下行传输，如果分组 如果分组被存储在绑定信道队列中，则被存储在通道队列中以及多个下行信道上，所述多个下行信道被绑定在一起以形成绑定信道组。 基于对应的信道队列或绑定信道队列的队列深度，为每个信道节点或绑定信道节点调整反馈数据。
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公开(公告)号：US5303257A
公开(公告)日：1994-04-12
申请号：US999503
申请日：1992-12-31
CPC分类号： H04B1/707
摘要： Method for carrier frequency correction in a direct sequence code division multiple access communication system having a carrier frequency, consisting of an expected carrier frequency and a carrier frequency error, modulated by a pseudo-noise code. A local frequency is produced equal to the expected carrier frequency. Received signals are demodulated of the pseudo-noise and mixed with the local frequency. The demodulated signals consist of in-phase signal components and quadrature signal components and the carrier frequency error. Each of the demodulated signal are converted to digital samples. Each signal digital sample is multiplied by stored digitized samples of a plurality of sinusoidal tones to produce a product corresponding to each tone. Each product corresponding to each tone is squared. The resulting squared products are compared to determine which squared product has the maximum value. The tone which corresponds to the squared product with the maximum value substantially equal to the carrier frequency error. The local frequency is adjusted to compensate for the carrier frequency error.
摘要翻译： 一种具有载波频率的直接序列码分多址通信系统中的载波频率校正方法，由载波频率误差构成，由伪噪声码调制。 产生等于预期载波频率的本地频率。 接收信号被解调为伪噪声并与本地频率混合。 解调信号由同相信号分量和正交信号分量和载波频率误差组成。 每个解调信号被转换成数字采样。 每个信号数字采样乘以多个正弦音调的存储的数字化采样，以产生对应于每个音调的乘积。 对应于每个音调的每个产品都是平方的。 比较产生的平方产品，以确定哪个平方产品具有最大值。 对应于平方产品的音调，其最大值基本上等于载波频率误差。 调整本地频率以补偿载波频率误差。
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公开(公告)号：US5291517A
公开(公告)日：1994-03-01
申请号：US999625
申请日：1992-12-31
CPC分类号： H04B1/707
摘要： A carrier frequency corrector for a receiver for use in a direct sequence code division multiple access communication system having a carrier frequency consisting of an expected carrier frequency and a carrier frequency error, modulated by a pseudo-noise code. A local frequency source provides a local frequency approximately equal to equal to the expected carrier frequency. A demodulator provides complex demodulated received signals stripped of the pseudo-noise code and mixed with the local frequency source. Each of the demodulated signals consists of in-phase signal components and quadrature signal components and the carrier frequency error. A sampler is coupled to the demodulator and converts the demodulated signal components to digital samples. A digital signal processor is coupled to the sampler and multiplies each signal component sample by stored digitized samples of a plurality of closely spaced sinusoidal tones to provide a product corresponding to each tone. The processor squares each product and compares the squared products to determine which tone provides the maximum value. That tone corresponds to the carrier frequency error. An adjuster between the digital signal processor and the local frequency source adjusts the local frequency source to compensate for the carrier frequency error for providing a local frequency equal to the received carrier frequency.
摘要翻译： 一种用于直接序列码分多址通信系统的接收机的载波频率校正器，其具有由伪噪声码调制的预期载波频率和载波频率误差组成的载波频率。 本地频率源提供近似等于预期载波频率的本地频率。 解调器提供被解码的伪噪声码的复杂解调接收信号并与本地频率源混合。 每个解调信号由同相信号分量和正交信号分量和载波频率误差组成。 采样器耦合到解调器，并将解调的信号分量转换为数字采样。 数字信号处理器耦合到采样器，并通过存储的多个紧密间隔的正弦音调的数字化样本乘以每个信号分量采样，以提供对应于每个音调的乘积。 处理器对每个产品进行平方，并对平方产品进行比较，以确定哪个音调提供最大值。 该音调对应于载波频率误差。 数字信号处理器和本地频率源之间的调节器调节本地频率源以补偿载波频率误差，以提供等于所接收的载波频率的本地频率。
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