公开(公告)号：US20050031027A1

公开(公告)日：2005-02-10

申请号：US10781698

申请日：2004-02-20

申请人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

发明人： Nobuhiko Noma ,  Genzo Takagi ,  Motoyoshi Nagai ,  Mitsuhiro Araki ,  Akira Atsuta

IPC分类号： H04J11/00 ,  H04B1/38 ,  H04L12/16 ,  H04L29/10 ,  H04M11/06

CPC分类号： H04M11/062

摘要： An ADSL modem apparatus is provided that accurately obtains a communication distance to an opposing ADSL modem apparatus, and that enables ADSL communication in an area exceeding the communication distance conventionally used. In the ADSL modem apparatus, a transmitter-receiver transmits and receives a carrier specified by a communication standard in a handshake procedure, and a processor estimates a communication distance to an opposing ADSL modem apparatus in accordance with a reception level of the carrier.

摘要翻译： 提供了一种ADSL调制解调器装置，其准确地获得与对方ADSL调制解调器装置的通信距离，并且能够在超过通常使用的通信距离的区域中进行ADSL通信。 在ADSL调制解调器装置中，发送接收器在握手过程中发送和接收由通信标准指定的载波，并且处理器根据载波的接收电平估计到相对的ADSL调制解调设备的通信距离。

公开(公告)号：US20050027876A1

公开(公告)日：2005-02-03

申请号：US10776284

申请日：2004-02-12

申请人： Toshitomo Umei ,  Noboru Katta ,  Yuji Mizuguchi ,  Takashi Akita

发明人： Toshitomo Umei ,  Noboru Katta ,  Yuji Mizuguchi ,  Takashi Akita

IPC分类号： H04L29/10 ,  H04L12/42 ,  H04L29/08 ,  G06F15/16

CPC分类号： H04L12/403 ,  H04L12/42 ,  H04L69/32 ,  H04L69/323 ,  H04L69/324

摘要： In a physical layer of each data transmission apparatus 1, a physical layer initialization process is performed in response to a reset exit process performed by the irrespective CPUs 4. Then, in a link layer of a master data transmission apparatus 1 and in a link layer of a data transmission apparatus 1 which operates in a normal mode, after the completion of the physical layer initialization process, a link layer initialization process is performed in response to a reset exit process performed by their respective CPUs 4, and then the data transmission apparatuses 1 start data communication using their respective physical layers and link layers. On the other hand, a link layer of a data transmission apparatus 1 which operates in a bypass mode maintains its reset state, and the data transmission apparatus 1 transmits data using only its own physical layer by bypassing its own link layer.

摘要翻译： 在每个数据传输装置1的物理层中，响应于由不同的CPU4执行的复位退出处理，执行物理层初始化处理。然后，在主数据传输装置1的链路层和链路层 在正常模式下工作的数据传输装置1，在物理层初始化处理完成之后，响应于由其各自的CPU 4执行的复位退出处理执行链路层初始化处理，然后数据传输装置 1使用其各自的物理层和链路层开始数据通信。 另一方面，以旁路模式工作的数据发送装置1的链路层维持其复位状态，数据发送装置1通过绕过其自身的链路层仅使用其自身物理层发送数据。

公开(公告)号：US20050015469A1

公开(公告)日：2005-01-20

申请号：US10622217

申请日：2003-07-18

申请人： Khawar Zuberi

发明人： Khawar Zuberi

IPC分类号： G06F13/38 ,  G06F9/46 ,  G06F13/00 ,  G06F15/16 ,  G06F15/177 ,  H04L29/06 ,  H04L29/08 ,  H04L29/10 ,  H04L29/14

CPC分类号： H04L67/1097 ,  H04L69/40

摘要： A method is provided for transferring control between a first network interface and at least a second network interface in a same multiple network interface device after the first network interface transmits an identifier generated by the first network interface. The method includes receiving a message from the second network interface to a program component, the message indicating the reception of the identifier from a second device. Next, the method provides for querying the first network interface to supply the program component with a list of identifiers generated by the first network interface and associated memory locations in the multiple network interface device memory. If the identifier received by the second device is present in the list, the method provides for transmitting a memory location associated with the identifier to the second network interface.

摘要翻译： 提供了一种用于在第一网络接口发送由第一网络接口生成的标识符之后，在同一多个网络接口设备中的第一网络接口和至少第二网络接口之间传送控制的方法。 该方法包括从第二网络接口向节目组件接收消息，该消息指示从第二设备接收标识符。 接下来，该方法提供用于查询第一网络接口以向节目组件提供由第一网络接口生成的标识符列表和多个网络接口设备存储器中的相关联的存储器位置。 如果由第二设备接收的标识符存在于列表中，则该方法提供将与该标识符相关联的存储器位置发送到第二网络接口。

公开(公告)号：US6137803A

公开(公告)日：2000-10-24

申请号：US949723

申请日：1997-10-14

申请人： Andreas Stiegler ,  Patrick Heck ,  Herbert Hetzel

发明人： Andreas Stiegler ,  Patrick Heck ,  Herbert Hetzel

IPC分类号： H04B10/20 ,  H04L12/42 ,  H04L29/10 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L12/42

摘要： The communication system has a plurality of subscribers connected through respective interface circuits to a ring feeder for the common transmission of digital source data and control data. The source data and control data are transmitted in a format which prescribes a pulsed sequence of individual bit groups of equal length. The bit groups are subdivided into component bit groups each forming a data channel. At least one date channel is provided for control data which are transmitted in data packets with a destination address. Furthermore, the interface circuit of each subscriber contains an address decoder. The communication system is simplified, and changes to the system are made easier in that at least one subscriber has a special address by means of which a received data packet is fed directly to an instruction decoder inside the interface circuit, which decodes to the bit base an instruction code contained in the data packet. The interface circuit, i.e., the subscriber reacts immediately to a corresponding instruction in the instruction code.

摘要翻译： 通信系统具有通过各自的接口电路连接到环形馈线的多个用户，用于数字源数据和控制数据的公共传输。 源数据和控制数据以规定相等长度的各个位组的脉冲序列的格式发送。 这些位组被细分成各自构成数据通道的组件位组。 为具有目的地址的数据分组中发送的控制数据提供至少一个日期信道。 此外，每个用户的接口电路包含地址解码器。 通信系统被简化，并且对系统的改变变得更容易，因为至少一个用户具有专用地址，通过该特殊地址将接收到的数据分组直接馈送到接口电路内的指令解码器，其解码到位基 包含在数据包中的指令码。 接口电路，即用户立即对指令代码中的相应指令进行反应。

公开(公告)号：US6130894A

公开(公告)日：2000-10-10

申请号：US37357

申请日：1998-03-09

申请人： Eric Ojard ,  Jason Trachewsky ,  John T. Holloway ,  Edward H. Frank ,  Kevin H. Peterson

发明人： Eric Ojard ,  Jason Trachewsky ,  John T. Holloway ,  Edward H. Frank ,  Kevin H. Peterson

IPC分类号： H04L13/08 ,  H04L1/00 ,  H04L7/027 ,  H04L7/04 ,  H04L7/10 ,  H04L12/413 ,  H04L25/03 ,  H04L27/26 ,  H04L29/06 ,  H04L29/10 ,  H04L12/28 ,  H04B7/212 ,  H04L12/66

CPC分类号： H04L12/40032 ,  H04L1/0054 ,  H04L1/0065 ,  H04L12/40013 ,  H04L12/413 ,  H04L25/03057 ,  H04L27/2647 ,  H04L7/027 ,  H04L7/041 ,  H04L7/10

摘要： A network interface is presented that receives packet data from a shared medium and accomplishes the signal processing required to convert the data packet to host computer formatted data separately from receiving the data packet. The network interface receives the data packet, converts the analog signal to a digitized signal, and stores the resulting sample packet in a storage queue. An off-line processor, which may be the host computer itself, performs the signal processing required to interpret the sample packet. In transmission, the off-line process converts host-formatted data to a digitized version of a transmission data packet and stores that in a transmission queue. A transmitter converts the transmission data packet format and transmits the data to the shared medium.

摘要翻译： 提出了一种从共享介质接收分组数据并实现将数据分组转换为主计算机格式化数据所需的信号处理的网络接口，与接收数据分组不同。 网络接口接收数据包，将模拟信号转换为数字信号，并将生成的样本包存储在存储队列中。 可能是主计算机本身的离线处理器执行解释样本分组所需的信号处理。 在传输中，离线过程将主机格式的数据转换为传输数据分组的数字化版本，并将其存储在传输队列中。 发射机转换传输数据包格式并将数据发送到共享介质。

公开(公告)号：US6128300A

公开(公告)日：2000-10-03

申请号：US984419

申请日：1997-12-03

申请人： Fred Horton

发明人： Fred Horton

IPC分类号： H04L27/26 ,  H04L12/56 ,  H04L29/10 ,  H04M3/00 ,  H04M11/06 ,  H04Q1/02 ,  H04Q3/42 ,  H04Q11/00

CPC分类号： H04Q1/155 ,  H04M11/06 ,  H04M3/005 ,  H04M3/007

摘要： An apparatus and methods for communicating data over a voice-band communications loop are disclosed. The apparatus includes transceiver circuitry, a backplane interface, backplane interconnection circuitry, and signaling circuitry. The transceiver circuitry transmits and receives voice-band modulated data over the communications loop. The backplane interface provides for physical interconnection to the backplane. Backplane interconnection circuitry couples the transceiver circuitry and the backplane interface to each other for data transmission to enable the exchange of digital data between the transceiver and the backplane. The signaling circuitry transmits and receives POTS call control signals over the communications loop. A method for receiving voice-band data is disclosed. The method includes establishing a voice-band connection over the communications loop, receiving a voice-band modulated data signal, converting the voice-band modulated data signal to digital data, and transmitting the digital data over a backplane bus. A method of transmitting voice-band data is also disclosed. The method includes establishing a voice-band connection over the communications loop, receiving digital data over a backplane bus, converting the digital data to a voice-band modulated data signal, and transmitting the voice-band modulated data signal over the communications loop.

摘要翻译： 公开了一种用于通过语音频带通信环路传送数据的装置和方法。 该装置包括收发器电路，背板接口，背板互连电路和信令电路。 收发器电路通过通信环路发送和接收语音频带调制数据。 背板接口提供与背板的物理互连。 背板互连电路将收发器电路和背板接口彼此耦合以用于数据传输，以实现收发器与背板之间的数字数据交换。 信令电路通过通信环路发送和接收POTS呼叫控制信号。 公开了一种接收语音带数据的方法。 该方法包括通过通信环路建立语音带连接，接收语音频带调制数据信号，将语音带调制数据信号转换成数字数据，以及通过背板总线发送数字数据。 还公开了一种发送语音带数据的方法。 该方法包括通过通信环路建立语音带连接，通过背板总线接收数字数据，将数字数据转换成语音频带调制数据信号，以及通过通信环路发送语音频带调制数据信号。

公开(公告)号：US6112266A

公开(公告)日：2000-08-29

申请号：US10813

申请日：1998-01-22

申请人： Han C. Yeh

发明人： Han C. Yeh

IPC分类号： G06F13/00 ,  H04L13/08 ,  H04L29/08 ,  H04L29/10 ,  H04L29/14 ,  H04M11/06

CPC分类号： H04M11/06 ,  H04L69/40

摘要： An HSP communication system includes a host computer which executes a software portion of an HSP modem and a device containing a digital-to-analog converter (DAC). In response to interrupts, the host executes an update routine that generates and writes samples to a software circular buffer in memory of the host computer. The samples represent amplitudes of an analog signal complying with a desired communication protocol. A direct transfer moves samples from the software circular buffer to a hardware circular buffer the device, and the DAC converts the samples from the hardware circular buffer into an analog communication signal. In an exemplary embodiment, the hardware portion is coupled to a PCI bus in the host computer, and direct transfers are according to the PCI bus master protocol. In environments such as multi-tasking systems, the host may skip interrupts or otherwise not provide new samples when required. In this case, the direct transfers transfer old samples, and the DAC reuses samples from the software circular buffer to generate a maintenance signal. If direct transfers are delayed, the DAC can reuses samples from the hardware circular buffer to generate the maintenance signal. The maintenance signal typically does not convey correct data but is sufficient to maintain a communication link and prevent a remote device from disconnecting or entering a retrain mode. For a better maintenance signal, the circular buffers contains samples for an integral number of periods of the baud frequency of the desired protocol. Error correction and retransmission can replace incorrect or lost data.

摘要翻译： HSP通信系统包括执行HSP调制解调器的软件部分的主计算机和包含数模转换器（DAC）的设备。 响应于中断，主机执行一个更新例程，该程序生成并将样本写入主计算机内存中的软件循环缓冲区。 样本表示符合所需通信协议的模拟信号的幅度。 直接传送将样品从软件循环缓冲器移动到硬件循环缓冲器，DAC将来自硬件循环缓冲器的采样转换为模拟通信信号。 在示例性实施例中，硬件部分耦合到主计算机中的PCI总线，并且直接传输根据PCI总线主协议。 在诸如多任务系统的环境中，主机可以在需要时跳过中断或者不提供新的样本。 在这种情况下，直接传输传输旧样本，DAC重新使用软件循环缓冲区中的样本来生成维护信号。 如果直接传输被延迟，则DAC可以重新使用来自硬件循环缓冲器的采样来产生维护信号。 维护信号通常不传送正确的数据，但足以维持通信链路并防止远程设备断开或进入重新训练模式。 为了获得更好的维护信号，循环缓冲器包含所需协议的波特率的整数个周期的采样。 纠错和重传可以替代不正确或丢失的数据。

公开(公告)号：US6108720A

公开(公告)日：2000-08-22

申请号：US163054

申请日：1998-09-29

申请人： Nir Tal ,  Ron Cohen ,  Zeev Collin

发明人： Nir Tal ,  Ron Cohen ,  Zeev Collin

IPC分类号： G06F13/00 ,  H04L13/08 ,  H04L29/10 ,  H04M11/00 ,  H04M11/06 ,  H04B1/38 ,  H04B1/44 ,  H04L5/16 ,  H04M1/00

CPC分类号： H04M11/06 ,  H04L7/005

摘要： An apparatus for and method of implementing a novel buffer based full duplex communication system is disclosed. The disclosed invention is particularly useful in native signal processing systems wherein heavy contention of processor resources typically exist, such as in systems running multi-tasking operating systems. The communication system of the present invention includes a receiver, transmitter, echo canceler, CODEC and telephone hybrid. The major components of the system operate on a buffer of input samples consisting of a set of input bits. The communication system operates to generate a buffer of output samples consisting of a set of output bits. The invention utilizes a novel buffer switching mechanism to optimize the tradeoff between processing response time, on one hand, and robustness to interrupt latency and processor implementation on the other hand. The internal processing of the modem works on a buffer full of samples once every time slice thus reducing the probability of a buffer underrun/overrun error occurring. The reduction in probability of data underrun/overrun is achieved by increasing the buffer size, thus giving the operating system greater leeway in choosing the exact time the signal processing functions are run. Small buffers, however, provide the communication system with short and accurate response time. These contradicting motives lead to the novel switchable size buffer scheme of the present invention. This is achieved without a loss of signal coherency.

摘要翻译： 公开了一种实现基于新型缓冲器的全双工通信系统的装置和方法。 所公开的发明特别适用于其中通常存在大量竞争的处理器资源的本机信号处理系统，例如在运行多任务操作系统的系统中。 本发明的通信系统包括接收机，发射机，回波消除器，CODEC和电话混合。 系统的主要组件在由一组输入位组成的输入采样的缓冲器上操作。 通信系统用于产生由一组输出位组成的输出采样的缓冲器。 本发明利用新颖的缓冲器切换机制来优化处理响应时间，另一方面优化中断延迟和处理器实现的鲁棒性之间的权衡。 调制解调器的内部处理工作在每次采样一次的样本缓冲区中，从而降低缓冲区欠载/超限错误发生的可能性。 通过增加缓冲区大小来实现数据欠载/超载的概率的降低，从而使操作系统在选择信号处理功能的精确时间方面具有更大的余地。 然而，小缓冲器为通信系统提供了短且准确的响应时间。 这些矛盾的动机导致本发明的新颖的可切换尺寸的缓冲方案。 这是在不损失信号一致性的情况下实现的。

公开(公告)号：US6087878A

公开(公告)日：2000-07-11

申请号：US6198

申请日：1998-01-13

申请人： Noriyuki Suzuki ,  Sohei Tanaka ,  Masafumi Wataya ,  Hiroshi Uemura ,  Nobuyuki Tsukada

发明人： Noriyuki Suzuki ,  Sohei Tanaka ,  Masafumi Wataya ,  Hiroshi Uemura ,  Nobuyuki Tsukada

IPC分类号： B41J29/38 ,  G06F3/00 ,  G06F3/12 ,  H03K5/08 ,  H03K19/0175 ,  H04L29/10

CPC分类号： H03K19/01759 ,  B41J2/04541 ,  B41J2/04586 ,  H03K19/017581

摘要： An interface in accordance with IEEE 1284 has a signal output stage which is a totem pole circuit. The totem pole circuit may be damaged if its output signal line is left grounded for an extended period of time or if outputs are being delivered at both ends of the signal line. Drive by the totem pole circuit is limited to a case where a signal to be output is at a low level and to a length of time equivalent to, say, one clock period from the moment the signal makes a transition from the low to a high level. A high impedance is established at all other times during which the high level is in effect, with the high level being maintained by a pull-up resistor connected to the output signal line. As a result, the totem pole circuit will not be damaged even if the output line is grounded while at the high level.

摘要翻译： 根据IEEE 1284的接口具有作为图腾柱电路的信号输出级。 如果图腾柱电路的输出信号线长时间接地，或输出端在信号线的两端传输，可能会损坏图腾柱电路。 图腾柱电路的驱动限于要输出的信号处于低电平的时间和等于从信号从低电平向高电平转变的时刻的一个时钟周期的时间长度 水平。 在高电平有效的所有其他时间建立高阻抗，高电平由连接到输出信号线的上拉电阻保持。 因此，即使在高电平时输出线接地，图腾柱电路也不会损坏。

公开(公告)号：US6040851A

公开(公告)日：2000-03-21

申请号：US9662

申请日：1998-01-20

申请人： Vernon Cheng ,  Greg Mauro

发明人： Vernon Cheng ,  Greg Mauro

IPC分类号： H04H20/00 ,  H04L9/10 ,  H04L29/10 ,  H04N21/418 ,  H04N21/4405 ,  H04N21/4623 ,  H04N7/10

CPC分类号： H04N21/4181 ,  H04N21/4405 ,  H04N21/4623

摘要： A method and apparatus are claimed that separate network-dependent from network-independent functions in set-top boxes (STBs), including digital consumer appliances and PCs. A receiver subsystem integrates network-dependent tuner, digital demodulation, Forward Error Correction (FEC), descrambling/decryption, and conditional access functions into a very small format (e.g., any of the PCMCIA Type I, II, or III form-factor). This combination of functions comprises a Digital Interface Conditional Access Module (DICAM). The DICAM interfaces with a Set-Top Universal Box (STUB) that includes network-independent functions. The STUB functionality may also be integrated with a consumer electronics (CE) appliance such as a TV, PC, DVD player, etc. The DICAM may also include an interface for "Smartcards" that implement any of the many different varieties of CA functions currently found around the world.

摘要翻译： 要求保护的方法和装置与机顶盒（STB）（包括数字消费电器和PC）中的与网络无关的功能与网络无关。 接收机子系统将网络相关的调谐器，数字解调，前向纠错（FEC），解扰/解密和条件访问功能集成到非常小的格式（例如，任何PCMCIA Type I，II或III形状因子） 。 这种功能的组合包括数字接口条件访问模块（DICAM）。 DICAM与包含网络无关功能的机顶盒通用盒（STUB）进行接口。 STUB功能还可以与诸如TV，PC，DVD播放器等的消费者电子设备（CE）设备集成.DICAM还可以包括实现目前许多不同种类的CA功能的“智能卡”的接口 在世界各地发现。