Motorola Corporation

Michael Russell Mannette

Timothy M Burke

Kurt W Steinbrenner

Camille Louise Dozier

Hang Kiu Chan

Bruce D Mueller

James Robert Kelton

Richard J Corrigan

Naveen Grover

Rob Bahary

Tom Nguyen

Rich Corrigan

Emanuel G Owoye

A telephony system having automatic timing adjustment for diverse routing of HFC systems has a signal stream routing through a signal line loop between a head-end and at least one communication unit. If a fault occurs within the signal line loop, recognized by the head-end when a short uplink burst from the communication unit does not align within a predetermined timing window, the head-end will cycle through predetermined delay parameters corresponding to various alternate signal line loops made up of redundant signal lines. Once the predetermined delay parameter corresponding to the current alternate signal line loop is determined, normal operation of the system resumes.

Automatic timing adjustment for diverse routing of HFC systems

A communications system (100) having a number of communications units (134) connected to the communications system (100) in which the communications units (134) receive power from the communications system (100). In response to a loss of power or some other event requiring the communications units (134) to shift into an active state, the communications units (134) shift into the active state at different times, avoiding peak power loads within the communications system (100).

Communication unit power up sequencing

A method for synchronizing timing of signal transmissions in a telecommunication system (100) determines a 'fixed portion' (222) of the propagation delay between the central unit (102) and subscribers (206, 208) in a particular node (202). Additionally, the method determines a `variable portion` (226) of the propagation delay that accounts for the variation of spacing of different subscribers (e.g., homes (206, 208)) on a particular node (202). The preferred method offsets the control unit's (102) receiving window (410) in accordance with the fixed portion, and directs the various subscriber units (206, 208) to offset the timing of signals (314, 322) (i.e., bursts of data) that they transmit by the variable portion (226).

Method and apparatus for synchronizing timing of components of a

A method and apparatus for controlling data transmissions from a first communications unit (202) to a second communications unit (210). Data transmissions received from the first communications unit (202) at the second communications unit (210) are processed to determine a power level of the data transmission. In response to a determination that the power level is not within a desired range or operating window (400), an adjustment value indicating the amount of change needed in the power level of the data transmission from the first communications unit (202) to fall within the desired range or operating window (400) is determined. This adjustment value is sent to the first communications unit (202). In response to receiving an adjustment value from the second communications unit (210), the first communications unit (202) adjusts the power level of its data transmissions. The first communications unit (202) and second communications unit (210) form a closed loop system providing for automatic gain control of the power level of data transmissions from the first communications unit (202).

Method and apparatus for adaptive RF power control of cable access units

A method of updating a software code in a cable communication system (10) involves the steps of receiving a notification (100) by a cable access unit (30). Next, the cable access unit (30) receives (110) the software code. After receiving (110) the software code the CAU (30) resets (114) and reboots using the software code.

Method for updating a software code in a communication system

A method and apparatus reduce power consumption in a subscriber unit of a communication system. The subscriber unit has a processor (10) for processing non-voice messages received from the communication system. The method includes the steps of receiving a communication signal (18) at the subscriber unit, detecting a presence or an absence of non-voice messages (20) in the communication signal, and disabling the processor (24) in response to detecting the absence of non-voice messages in the communication signal. The apparatus includes a receiver (12), a message detector (14) and a controller (16) for carrying out the foregoing steps.

Method and apparatus for reducing power consumption in a subscriber unit

A method for locating a carrier (220) includes the steps of tuning to a first anticipated carrier location (240) within a first subband division (216), attempting to locate the carrier (220) at the first anticipated carrier location (240) within the first subband division (216), tuning to a second anticipated carrier location (223) within a second subband division (217) if failing to locate the carrier in the first subband division (216), and attempting to locate the carrier (220) at the second anticipated carrier location (223) within the second subband divisions (217).

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Bloomingdale, IL, United States of America

Michael Russell Mannette