CableLabs Invention Disclosures
This listing contains published invention disclosures made by Cablelabs. This public listing is intended to serve as a "printed publication" as defined under 35 U.S.C. 102.

DateTitleSummary
09/18/08A Method for a CM to Optimize Initial Ranging of Multiple Channels for DOCSIS 3.0 in a Plant with Strong Linear DistortionSimilar to storing the power level, this invention proposes storing the pre-equalization coefficients along with upstream channel ID in non-volatile memory at the CM This invention proposes a mechanism for DOCSIS 3.0 CMs to optimize the performance of initial ranging in a strong micro-reflection environment when multiple channels are supported by applying the pre-equalization values extrapolated from the first channel in the ranging request for the subsequent channels as long as there are no stored pre-equalization coefficients. In the case of re-initialization of the modem, if the upstream channel has not changed, using the stored pre-equalization should be given precedence over the values used for the first channel. A benefit of this proposed mechanism is to reduce the burden on the CMTS in massive outage situation as the modems are brought back on-line. An added benefit of this mechanism is in reducing the time for the cable modem to achieve high fidelity transmission in both scenarios: massive outage or normal CM initialization process. The same approach is also valid in the case when the frequency of a channel in a MD-US-SG is changed or a new channel is added to the MD-US-SG.
09/11/08A Method for Seamless Channel Change (DCC) in a Plant with Strong Linear DistortionThis invention proposes a mechanism to effect a fast and optimized change to a new channel using DCC (DOCSIS 2.0 Dynamic Channel Change) in a strong micro-reflection environment. In this environment, the CM will be forced to perform initialization technique 2 that requires the CMTS to recalculate the pre-equalization coefficients after receiving the ranging request on the new channel and provide it in the ranging response. By deriving the pre-equalization coefficients for the new channel from the values used by the current channel, this proposal will eliminate the step where CM sends ranging request and CMTS communicates the pre-equalization coefficient using an unsolicited ranging response. The seamless approach defined in this disclosure will be useful in supporting business services where stringent SLA requirements are placed. In addition, it will improve reliability and service assurance of voice services by decreasing the number of dropped calls.
09/10/08Method for IP Content Delivery Using Existing Cable NetworksSystem to support IP-only delivery of media content within the home, allowing IP-only set-top boxes, TVs and other presentation devices, while simultaneously supporting delivery to homes supporting legacy devices.
09/10/08MPEG Voice MailCable subscribers can use a STB to retrieve voice mail messages left for their digital voice account without requiring the use of a telephony device or client.
09/10/08Cascading DOCSIS Service Flows via Dynamic Service Flow/Tunnel CreationThis invention provides a mechanism for faster upstream DOCSIS data rates via the dynamic creation of data tunnels and matching service flows within a single CM.
06/30/08Pre-Equalization Based Pro-active Network Maintenance Process ModelThis disclosure describes process for analyzing the pre-equalization information to determine the gravity of the network problem and geographically isolating the source of the problem. Even though this embodiment details the pro-active maintenance process using pre-equalization parameters and DOCSIS defined parameters, the methodology can be applied to other impairments along with their related network health metrics.
06/30/08A Simple Algorithm for Fault Localization Using Naming Convention and Micro-reflection SignatureThis invention proposes a simple algorithm to determine the location of the fault after calculating the micro-reflection signature and applying the naming convention described in previous disclosures. A manifestation to implement this algorithm is described by defining an XML schema and XPath queries. This algorithm enables efficient processing of large numbers of CMs thus facilitating scalability and automation.
01/30/08High Availability Mechanism for Modular CMTS SystemsThis invention provides a way to offer high availability with M-CMTS systems. It provides 1+1 redundancy for M-CMTS Cores and n+1 redundancy for EQAMs by exchanging status messages and performing health checks on various components.
01/30/08DOCSIS Timing Interface (DTI) Test DongleThis device allows a user to connect an oscilloscope to an M-CMTS core device without using scope probes.
01/11/08DT Box: DOCSIS Test BoxA diagnostic device with multiple applications in CATV environments; can be used to simulate a standard DOCSIS Cable Plant and provides a means for capturing and analyzing specific types of Radio Frequency signals. The tool is particularly adapted to sensing bursty traffic on coaxial networks and providing triggering signals to RF measurement equipment.
01/11/08A method/architecture for enabling 2-way cable services to home networked IP-STBs with OCAP, but w/o cable modem and tunerThis invention describes a method/architecture for extending traditional 2-way cable services to OCAP-enabled IP-STBs (w/o cable modem and tuner) via a 2-way gateway device.