Abstract: A communication apparatus comprises a reception unit that receives a reception signal from a metal cable and extracts reception data; a transmission unit that sends a transmission signal obtained by modulating transmission data with a frequency included in a first frequency band to the metal cable; an interference signal detection unit that detects a signal used in communication using a cable modem, modulated by a frequency included in a second frequency band, and transmitted over the metal cable as an interference signal; and a signal transmission control unit that instructs the transmission unit to modulate transmission data using a frequency included in a third frequency band that does not have any frequency band overlapping the second frequency band when the interference signal is detected and a frequency band overlapping both the first frequency band and the second frequency band exists.

Abstract: The present disclosure discloses a method, wherein the method comprises generating a passive optical network (PON) protocol message, wherein the PON protocol message comprises an identifier of a PON user terminal and an action indication indicating that the PON user terminal intends to exercise a first power supply mode that is a power-saving mode. The present disclosure further provides a method for controlling the PON power supply and for reporting the power supply state. The present disclosure allows control of the energy usage of the PON user terminal to save power when a service in the PON user terminal is not used or when the user terminal uses a backup power source to supply power.

Abstract: A method performed by a central network device, such as a network edge device, or a CMTS, determines whether some of a plurality of user devices coupled to a communication device are transmitting at substantially their respective maximum power output level over a given channel. If the central device determines that some of the devices are operating at near their maximum output level (“power pegged,) the central device searches for another channel that can carry the traffic of the power pegged devices at reduced data rate. If another channel can accommodate transmission of signals of the power pegged device, the central device instructs the power pegged devices to tune to the new channel at a reduced data rate compared to the data rate of the current channel.

Abstract: A leak defined by coordinates is located in a network. A signal emitted from the leak is detected at first, second and third points having first, second and third sets of coordinates, respectively. Propagation delays t1, t2 and t3 of the signal are measured, which include the propagation delays between the leak and the first, second and third points, respectively. The time difference ?t12 between delays t1 and t2 and the time difference ?t23 between delays t2 and t3 are calculated. The approximate location of the leak is determined by solving for the coordinates of the leak in at least two hyperbolic equations, where the equations are defined by the time differences ?t12 and ?t23, and by the first, second and third sets of coordinates.

Abstract: The present disclosure discloses a digital communication between the embedded cable modem (eCM) and embedded set-top box (eSTB) via a shared memory. The communication is carried out by packet transfer mechanism as per the protocol without adding any extra header overhead. The communication link is established between the eSTB and eCM mainly in layer 2 and partly in layer 1 according to an implementation of the OSI model. Further, eSTB is used as an eSAFE device coupled to eCM where the eCM and eSTB are considered to be placed on two SoCs with a separate CPU to each SoC (System-On-Chip) with a shared memory (via high speed data bus protocol). DMA (Direct Memory Access) engines are used to accelerate data transfer and to reduce load. DMA of only eCM, SoC is used to minimize hardware resources.

Abstract: Systems and methods for identifying which video segment is being displayed on a screen of a television system. The video segment is identified by deriving data from the television signals, the derived data being indicative of the video segment being displayed on the screen. This feature can be used to extract a viewer's reaction (such as changing the channel) to a specific video segment (such as an advertisement) and reporting the extracted information as metrics. The systems and methods may further provide contextually targeted content to the television system. The contextual targeting is based on not only identification of the video segment being displayed, but also a determination concerning the playing time or offset time of the particular portion of the video segment being currently displayed.

Abstract: A system and apparatus for enhancing delivery of media services is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a set-top box that can have a controller element to present at a media device a first satellite program of a number of satellite programs. A first request is received from a cell phone for content associated with the number of satellite programs. A second request is transmitted over a broadband Ethernet connection to a media system that is separate from equipment of the satellite service provider, to cause the media system to submit a fee to the multimedia satellite provider related to the content information. Content information is received over the Ethernet connection without interrupting the presenting of the first satellite program. Additional embodiments are disclosed.

Abstract: Methods, computer program products and apparatus for providing broadband television service (BTS) are provided. The method includes receiving a channel selection at a receiver located at a service location. The channel selection is correlated to an Internet address. Data is requested from the Internet address. The request is made to a digital subscriber line (DSL) network via a modem. Video data packets containing live streaming video content are received from the Internet address in response to the requesting. The video data packets are received from the DSL network via the modem. The video data packets are assembled into video signals for display on a television and the video signals are transmitted to the television.

Abstract: A network addressable appliance with digital multimedia recording capabilities has limited access including playback of stored multimedia content upon faulty connection with a service provider network. Upon a connectivity event, the network addressable appliance compares a retrieved hardware address for a connected residential gateway to a stored hardware address for an assigned residential gateway. If the two hardware addresses correspond, the network addressable appliance provides playback to stored multimedia content. The system helps prevent violations of digital rights management rules by restricting access to stored multimedia content while the network addressable appliance is connected to an unauthorized residential gateway. The system provides a user with limited access (i.e. playback) to multimedia content during service provider network outages.

Abstract: A method and an apparatus for communication between an Automatic Configuration Server (ACS) and a Customer Premise Equipment (CPE) over an Internet-based network are provided. A CPE determines in a power standby state whether an inform request message transmission period is received. If the inform request message transmission period is received, the CPE transitions from the power standby state to an active state and transmits an inform request message to an ACS. The CPE receives an inform response message from the ACS in response to the inform request message, and upon receiving the inform response message, transitions from the active state to the power standby state.

Abstract: Techniques are provided herein for tagging configurable objects. The configurable object is part of a cable system and is configured to be managed by a cable modem termination system (CMTS). In response to determining that a tag rule matches one or more properties of the configurable object, the first tag is associated with the configurable object. A record of the configurable object and the associated tag is generated or stored within the CMTS.

Abstract: A router module is arranged in a housing of a smart television. The router module is externally connected to a modem for surfing the Internet. The router module is electrically connected to a micro processing unit of the smart television. Therefore, the smart television is connected to the Internet through the router module. A wireless transmission chip of the router module is configured to process Internet signals. An antenna module is configured to wirelessly transmit the Internet signals, so that wireless network is shared to outside.

Abstract: In one embodiment, a router that accesses a cable network through a cable modem receives, from the cable modem, a plurality of service-flow classifications utilized by the cable modem to describe service flows on the cable network. Based on the received service-flow classifications from the cable modem, the router determines traffic destined for the cable network that corresponds to each service-flow on the cable network. The router receives, from the cable modem, an indication of network backpressure for a particular service-flow on the cable network. The indication of network backpressure is received when a threshold of network backpressure has been surpassed for the particular service-flow on the cable network. The router controls particular traffic that corresponds to the particular service-flow on the cable network based on the indication of network backpressure for the particular service-flow on the cable network.

Abstract: A system and method for a operating a content distribution system includes a destination device and a requesting device that communicates a primary audio stream secondary audio stream and a video stream to the destination device. The destination device communicates the primary audio stream to a display. The destination device includes a secondary decoder configured to decode the secondary audio stream to form a decoded secondary audio stream. The destination device combines the secondary decoded audio stream and the primary audio stream.

Abstract: A media gateway that services a plurality of client devices may be used to combine a plurality of encoded multimedia transport streams, which may comprise a buffered copy of received encoded broadcast multimedia transport stream and an encoded local multimedia transport stream that pertains to the broadcast transport stream. The media gateway may decode the encoded broadcast multimedia transport stream to extract broadcast multimedia content carried therein based on determination of capabilities of one or more client devices used in playback of the content. The encoded local multimedia transport stream may be generated based on local multimedia content generated and/or captured via one or more client devices. The buffering duration of the received encoded broadcast multimedia transport stream may be adaptively determined, to ensure that the encoded local multimedia transport stream and the encoded broadcast multimedia transport stream are synchronized when they are combined.

Abstract: A method to extend the downstream and upstream data carrying capability of an HFC CATV system. At the neighborhood level, the CATV cable (the primary channel) is divided into different segments connected by electrically active junctions. At the junctions, each segment is also connected to a secondary data channel, such as an optical fiber or ultrahigh RF frequency (1 GHz+) secondary channel, which can carry supplemental downstream narrowcast channels and upstream channels between a plurality of such CATV cable segments. At the junctions, some CATV primary channel RF signals such as broadcast channels are passed without interference, while certain primary channel downstream narrowcast RF channels and upstream narrowcast RF channels are precisely suppressed using adaptive cancelling methods. Such adaptive cancellation methods are superior to prior art lowpass, highpass, and bandpass filtering methods because they allow for more efficient use of limited CATV primary channel RF spectrum.

Abstract: A processor for a cable television set-top box has an interface for coupling the processor to a second processor. The processor also has a port that is coupleable to control a tuner, a demodulator and a DOCSIS module with or without DSG support. The tuner has an output coupled to the demodulator input, and the demodulator has an output to the DOCSIS module input. The demodulator's output is also coupled to a conditional access module controlled by the second processor. The processor issues commands via the port to control at least one of the tuner and the demodulator based on instructions received via the interface from the second processor.

Abstract: A system, method, and computer program product for allowing a first processor to access flash or other non-volatile memory that is associated with a second processor. The first processor obtains parameters that allow the initialization of an internet protocol (IP) stack. The parameters can be obtained using the trivial file transfer protocol (TFTP), for example. The first processor communicates with the second processor using a socket protocol, sending a command word that represents either a read or write command. The command word specifies where in the non-volatile memory the access is to occur, and for how many bytes. Information is then returned to the first processor, allowing the first processor to verify the success of the access.

Abstract: A method of accelerated carrier signal acquisition for a digital communication receiver, the method comprising receiving a carrier signal by a receiver comprising a carrier recovery loop (CRL), setting the CRL to an open loop setting using a processor, setting a numerically controlled oscillator (NCO) within the CRL at a center frequency of the NCO, determining, by the processor, one or more initial parameters of the CRL, calculating an estimate and polarity for a sign frequency detection frequency using a sign frequency detector while simultaneously estimating a Fast Fourier Transform (FFT) frequency by running an FFT using the processor, comparing polarities of the estimates of the sign frequency detection frequency and FFT frequency and determining a frequency offset using the processor, and adjusting one or more parameters of the CRL based on the frequency offset using the processor.

Abstract: An HFC cable communication system comprising: a CMTS having a first attenuator to attenuate one or more upstream signals applied to the CMTS; an optical link having a dynamic range and comprising an optical receiver having a second attenuator to attenuate the upstream signal(s) and an optical transmitter having a third attenuator to attenuate the upstream signal(s); a coaxial RF link comprising one or more RF amplifiers having a fourth attenuator to attenuate the upstream signal(s); and one or more subscriber modems to generate the upstream signal(s) at respective transmit RF signal levels. The CMTS implements a long loop ALC to set the transmit RF signal level(s) based on received RF signal levels of the upstream signal(s) at the CMTS. Respective values for the first, second, third and fourth attenuators are selected based on the dynamic range of the optical link so as to facilitate implementation of the long loop ALC and effective transmission of upstream information carried by the upstream signal(s).

Abstract: A method for configuration conversion includes: switching a working mode to a virtual Cable Modem (CM) mode according to a virtual mode switching notification message sent by an Optical Line Terminal (OLT); obtaining first configuration information from an Operations Support System (OSS), the first configuration information being DOCSIS-based configuration information; converting the first configuration information into second configuration information, the second configuration information being PON-based configuration information; implementing local parameter configuration according to the PON-based second configuration information; and sending a configuration complete message to the OLT after the configuration is complete. With the present disclosure, a performance bottleneck problem that might otherwise exist within the OLT art can be solved, and a service provisioning efficiency can be improved.

Abstract: In embodiments of media asset voting, a voting application is executed at a controllable device to interface the controllable device with portable devices via a wireless network. The voting application may be initiated at the controllable device by one of the portable devices. A request can be communicated from the controllable device to the portable devices to initiate each of the portable devices sending a user-selected vote for media asset selection at the controllable device. The controllable device receives the user-selected votes from one or more of the portable devices, and the voting application can aggregate each received vote to determine voting results. A media asset can then be selected at the controllable device based on the voting results. Alternatively or in addition, the voting results can be displayed for viewing on a display device that corresponds to the controllable device.

Abstract: An enhanced cable card device is described that operates in host devices without requiring an out-of-band data channel. One embodiment includes a broadcast receiver for receiving a broadcast signal, a processor for coordinating processing in the cable card, a memory for storing data normally received by the cable card over an out-of-band signal, an in band data receiver for receiving an in band data signal, and a control program running on the processor to signal reception of an out-of-band signal to a host device electrically connected to the cable card. In addition, the control program processes data from the memory and provides processed output data to the host device simulating data normally received over an out-of-band data channel, and the cable card allows the host device to operate normally without an out-of-band receiver.

Abstract: Disclosed are a cable modem and a data receiving method thereof. The cable modem includes a downlink channel retrieval processing unit to retrieve a downlink channel, receive an entire channel information message through the retrieved downlink channel, and receive a broadcasting supplementary data message when the entire information message is valid; a channel information processing unit to receive broadcasting supplementary data using the broadcasting supplementary data message; an uplink channel retrieval processing unit to retrieve an uplink channel using the entire channel information message; and a channel information managing unit to store and manage main data receiving channels capable of receiving the entire channel information message and the broadcasting supplementary data.

Abstract: Methods, systems, and apparatus can be used to prioritize channel scanning. In various implementations, a nonvolatile memory on a CPE device can store downstream channels that a CPE device previously identified as being used by a headend. In some implementations, the nonvolatile memory can be organized or arranged such that DOCSIS 3.0 channels receive preference upon initialization. In other implementations, the selection of the channels from nonvolatile memory can be prioritized to select DOCSIS 3.0 channels over other types of channels.

Abstract: Methods and systems for cross-protocol time synchronization may comprise, for example in a premises-based network, receiving a signal that conforms to a first communications protocol (e.g., a general-purpose communications protocol), extracting a global time of day (GTOD) clock from the received signal; and synchronizing communication on the premises-based network in accordance with a second communication protocol, based at least in part on the extracted GTOD clock. The first communications protocol may comprise data over cable service interface specification (DOCSIS) or any protocol that provides a GTOD. The second communication protocol may comprise a multimedia over cable alliance (MoCA) standard, an IEEE 802.11x standard, or any non-public wireless network protocol. The GTOD clock may comprise a GPS clock, a GLONASS clock, and/or a Galileo clock. One or more of the networked devices may comprise a network controller, where the network controller comprises wireless network and wired network capability.

Abstract: Techniques disclosed herein include systems and methods for excluding specific application traffic from customer consumption-based data billing counts. This is useful for excluding traffic from consumption totals where the application traffic has been accounted for using other means, such as through billing as a separate or technically distinct service. In practice, a tablet computer (or other end user device) can run a video application that uses a high-speed data network via a cable modem. This video application may be included as part of a core video package associated with a distinct cable television service. The system then provides accurate consumption billing of customer traffic that is outside of any other managed services by creating separate logical data service flows at a Cable Modem Termination System (CMTS) for excluding specific traffic counts.

Abstract: An apparatus and method for resuming playback of media content from more than one Internet Protocol Television (IPTV) device. The playback of a media asset or media content typically contains an asset ID and a start time. Based on the architecture of a second display device (e.g., a second IPTV device) the IPTV system determines the identity of an account and its associated IPTV devices. When a user pauses an asset, the system sends the asset identification (ID) and the stop time to a server operatively coupled to the system. The next time (within a predefined duration) the user requests the same asset ID, the pause time and the asset ID are returned. Using the pause time and the asset ID, the user can resume playback of the asset.

Abstract: Producing advanced HFC CATV cable systems while easing the burden of backward compatibility. The system improves CATV data carrying capacity by moving RF QAM modulators from the cable head end to various individually or group addressed optical fiber nodes supplying neighborhood CATV cables, and sending data from the cable head IP backbone to the nodes over optical fiber as IP data packets. For high backward compatibility, the system digitizes legacy RF waveforms, or demodulates legacy QAM waveforms to QAM symbols, also transmits these over the optical fiber as IP data packets, and then reconstitutes back to original waveforms as needed. The system is thus able to easily handle legacy NTSC, FM, QPSK waveforms and do partial (QAM symbol level) compression of legacy QAM waveforms to and from multiple nodes without requiring additional optical fiber wavelengths. The system may use non-standard upstream/downstream CATV frequency splits, filter bank receivers, and FPGA/DSP/ASIC methods.

Abstract: Methods to improve the data carrying capacity of CATV DOCSIS systems and other communications systems are disclosed. Communications channels may be more efficiently spaced with reduced or absent guard bands by using receivers with adaptive signal cancellation methods, equalizing circuits, or polyphase filter banks and Fast Fourier Transform signal processing methods to correct for higher levels of cross-talk. QAM type communications channels may also be utilized on a synchronized two-transmitter at a time basis by adjusting the transmitters to predefined signal levels, such as +1, ?1, +½, ?½ to enable the combined signals to be distinguished at the receiver. These two methods may be combined to create a still higher data throughput system.

Abstract: Provided is a content converting method and system. The content converting method and system may extract web content elements from collected web contents, may extract domain elements from a web page including the web contents, may match the extracted elements with broadcast content elements and thus, may enable the web contents to be played in a broadcast receiving apparatus.

Abstract: Embodiments provide solutions to reduce power utilization (either at individual cable modems or in the overall network) in future cable networks. Particularly, embodiments seek to reduce power utilization at individual cable modems and in the overall network, by pre-compensating upstream transmissions according to feedback channel characteristics received from the headend. According to embodiments, pre-compensation is performed using power filtering/amplification and/or bit loading. Pre-compensation can be performed individually per cable modem. Further, pre-compensation can be performed over the entire upstream frequency spectrum and/or over particular sub-hands of the frequency spectrum as appropriate for each cable modem.

Abstract: A system and apparatus for enhancing delivery of media services is disclosed. A system that incorporates teachings of the present disclosure may include, for example, a set-top box that can have a controller element to present at a media device content information received over a broadband connection. The content information can be associated with at least one satellite service presented to the media device over satellite signals disassociated with the broadband connection. The content information can also be received responsive to a request for said content information. Additional embodiments are disclosed.

Abstract: A method of providing internet protocol television (IPTV) diagnostics. The method includes receiving customer premise equipment (CPE) information from a diagnostic applications program interface (API) executing in a CPE. The CPE information is stored in a database. An issue is detected with the CPE and the CPE information in the database corresponding to the CPE experiencing the issue is accessed. The issue is resolved in response to the CPE information the database.

Abstract: An integrated cable modem and cable television management system. The invention may include a stand alone device, a portable device, or a vehicle adapted device in various embodiments of the invention. The invention allows for two-way communication and interaction between a television service provider and a user of the device. In addition, other various circuitries may reside in the device allowing storage and processing of received signals. The invention allows a device operable to receive different broadcast signals, including analog and digital signals. In addition, the invention allows for download of selectable programming from a cable television server using the device, either offline, streaming, or in real time when online. The invention allows for recording and buffering of received signals. In addition, the invention allows for control of commercials, publications, and content contained within received signals. The invention allows for time compression of such signals as well.

Abstract: In one embodiment, a television configuration technique includes determining a location, from a web service, of a television set using an internet protocol address of the television set or a zip code corresponding to a physical location of the television. Electronic programming guide, interactive programming guide or the like data for a plurality of service providers in the determined location are downloaded. The electronic programming guide data, interactive programming guide data, or the like for one or more channels that are unique between the plurality of service providers are checked against transmitting station identifier data or system information protocol data to identify the specific service provider that the television set is connected to. A channel list for the specific service provider is then determined from the electronic programming guide or interactive programming guide corresponding to the specific service provider.

Abstract: A modem or associated computing or testing device is configured to detect the presence of one or more faults that affect DSL communications, and upon their detection, generate, for example, an indication, communication or message that recommends corrective action. In this context, a fault is generally caused by one or more unfiltered devices, impulsive noises, malfunctioning modems, or other factor that does not affect measured attenuation or measured noise, but does affect the signal-to-noise ratio (SNR) of the link. In addition to being able to generate a message guiding a user through corrective action, the system can estimate the rate impact of the detected fault.

Abstract: Distributed and highly software reconfigurable CMTS (CMRTS) device, based on MAC and PHY units with FPGA and DSP components, for a HFC CATV network. The various CATV RF modulators, such as QAM modulators, may be divided between QAM modulators located at the cable plant, and remote QAM modulators ideally located at the fiber nodes. A basic set of CATV QAM data waveforms may optionally be transmitted to the nodes using a first fiber, and a second set of IP/on-demand data may be transmitted to the nodes using an alternate fiber or alternate fiber frequency, and optionally using other protocols such as Ethernet protocols. The nodes will extract the data specific to each neighborhood and inject this data into unused QAM channels, thus achieving improved data transmission rates through finer granularity. A computerized “virtual shelf” control system for managing and reconfiguring the FPGA and DSP based CMTRS units is also disclosed.

Abstract: Apparatus and methods for protected content access, browsing and transfer over a network. In one embodiment, the network comprises a premises (e.g., residential) LAN, and the apparatus comprises a server and renderer consumer premise equipment (CPE). The renderer CPE scans the network to search for a server CPE that implement a compatible security framework. The renderer authenticates itself with the server, and the server allows content browsing and selection access only to an authorized and authenticated renderer. A negotiation and exchange protocol comprises messages exchanged between the renderer and the server that include one or more of device identification, encryption key exchange, digital certificates and information regarding security package used by each CPE.

Abstract: A method of initializing, provisioning, and managing a cable modem and a customer premise equipment device includes, prior to receiving the configuration file for the cable modem, providing an equipment identification message containing a description of the customer premise equipment device connected to the cable modem. In the case where the cable modem has yet to be provisioned, the configuration file received from the network server is a particular access-limiting configuration file that is selected from a group of access-limiting configuration files. The selection of the particular access-limiting configuration file is based on the description of the customer premise equipment device in the equipment identification message. This allows different devices to have different network restrictions or different walled gardens.

Abstract: Ingress noise labeling tags are coupled into the signal path at various nodes of a cable network. The tags imprint a unique electric signature into a local ingress noise, making the noise identifiable at the headend of the network. In one embodiment, tags do not require external control signals to operate, the electrical response of the tags being determined by present and/or past magnitudes of the return path signal. Such tags can be made entirely passive, not requiring a control signal or an external source of electrical power.

Abstract: A system is described that consists of a variable modulation unicast system that utilizes multiple modulation schemes in a cable network for unicast applications and is capable of assigning users to different channels of differing modulation schemes in the network based on a feedback signal received in response to a transmitted probe signal. The system may also, in response to the feedback signal from a remote device in the network, assign a channel from a plurality of channels having differing carrier frequencies and modulation schemes to the remote device and may also modify the carrier frequencies of the channels.

Abstract: A method and system of processing sampled voice packets from a voice packet sender for transmission over a bit-rate sampled data transmission system, such as by a cable modem over a cable modem termination system, to a voice packet recipient. Unsolicited grant arrivals in response to a request from the voice packet sender coupled to the cable modem are determined. The storing of sampled voice packets is synchronized with the unsolicited grant arrivals. Upon receipt of an unsolicited grant arrival, currently stored sampled voice packets are transmitted to the cable modem for further transmission to the voice packet recipient over the cable modem termination system.

Abstract: A network device may be operable to receive an indication from a cable modem termination system (CMTS) that media access control (MAC) management messages will be transmitted by the CMTS at fixed intervals. Subsequent to receiving the indication, the network device may be operable to power down one or more components of the network device and set a sleep timer to a value equal to an integer multiple of the fixed interval minus a transition period. The network device may power up the one or more components of the network device upon expiration of the sleep timer. The network device may power up the one or more components of the network device upon an amount of traffic in a buffer of the network device reaching a threshold.

Abstract: Methods and systems are described for providing complete Internet anywhere with partial server processing in which a request is sent from a set-top-box (STB) to a server communicatively coupled with the STB to process a portion of a web page that is unsupported by a web browser running on the STB. In one such method, the STB sends to the server an unsupported content request associated with a portion of a web page that is unsupported by a web browser executing on the STB. The STB receives a data stream from the server in response to the unsupported content request. The data stream was generated at the server by processing the unsupported portion of the web page. The STB composites the received data stream with another portion of the web page, that is supported by the web browser, to produce the web page.

Abstract: A method for increasing upstream bandwidth per cable modem user in a cable communications system that includes a cable modem termination system (CMTS) and a plurality of cable modems is provided. The method permits a cable modem to transmit data to the CMTS on multiple upstream channels simultaneously using a technique called “channel bonding.” Channel bonding allows smaller bandwidth upstream channels to be bonded together to create a larger bandwidth pipe.

Abstract: In a DOCSIS-based communications system, different upstream channel descriptors (UCDs) all identify a single logical upsteam channel identifier (UCID) regardless of the type of cable modem (CM) to which the UCDs are sent. Different CMs having different capabilities (e.g., CMs configured according to the different DOCSIS standards 1.x, 2.0, and 3.0) receive their respective UCDs from an upstream headend. All the UCDs, however, refer to the same logical upstream channel. The different CMs therefore share this single logical upstream channel.

Abstract: A transceiver includes a transmitter circuit, a receiver circuit, and the loopback switch. The transmitter circuit performs a digital-to-analog conversion (DAC) operation on a calibration code without a transmission digital signal in a calibration mode to generate a calibration signal. The transmitter circuit up-converts the calibration signal and generates a transmission signal. The receiver circuit down-converts the transmission signal in the calibration mode and generates a receiving digital signal. The loopback switch electrically connects an output terminal of the transmitter circuit and an input terminal of the receiver circuit in the calibration mode. Thus, the transceiver may stably reduce a carrier leakage irrespective of processes, voltages, and temperatures.

Abstract: Provided are a method and system for a module for a cable modem termination system. The module includes a digital modulator configured to block up-convert a plurality of digital channels and a digital to analog converter coupled, at least indirectly, to an output of the digital modulator to convert the digital channels to an analog format.

Abstract: A novel apparatus for and method of upstream power control for multiple transmit channels. The invention is particularly useful in environments that include two level amplification, wherein the first level corresponds to each channel separately and the second level corresponds to the joint sum of all the channels. When working with two-level amplification, changing the joint sum amplification is permitted during specific time periods known as “CMTS re-configuration time” in the DOCSIS specification. The mechanism functions to maintain an optimal transmit power operating point of the PGA using self-configuration without any need to receive permission from an exterior control entity such as the cable head-end thus bypassing the prior art requirement of waiting for a global reconfiguration time from the CMTS (i.e. when the specification assures that there is sufficient time to change the PGA gain).