Master clock

About: Master clock is a research topic. Over the lifetime, 2949 publications have been published within this topic receiving 35812 citations.

Clock synchronization in a distributed system

Abstract: The present invention provides an improved clock synchronization algorithm for a distributed system intended for real time applications by performing at the same time an off-set correction and a clock read correction at each node of the distributed system. Expensive oscillators can be avoided and synchronization can be established faster and with higher precision.

Methods and apparatus for synchronization in a wireless network

Abstract: As part of a preferred communication protocol, base stations (12) which are synchronized to a PSTN (20) of a wireless communication network (10), periodically transmit a preamble. A remote detects the preamble and, upon verification of the data contained in the base station transmission, sets its counter to an initialized state based on the received preamble. An early/late analysis of each subsequently received base station timing pulse is used to adjust both the mobile station timing and to adjust the output frequency of the mobile station master clock and codec clock to effectively maintain end to end synchronization with the respective base station and the PSTN throughout the duration of an established communication link.

System for synchronizing multiple computers with a common timing reference

Abstract: A synchronized timing system is disclosed for one or more of a plurality of network interconnected computers. The system utilizes a global satellite system and includes a receiver device for detecting out-of-phase signals from a plurality of satellite sources of the satellite system. A mechanism is provided for processing and phase correlating these signals to generate a single absolute time reference signal therefrom. An interface device is disposed in each computer for receiving the reference signal and adapting this signal as the internal master clock reference for the operating system of the computer. Finally, a mechanism interconnects each computer in the network of computers to synchronize the internal master clocks of the computers to the absolute time reference signal to create a plurality of network interconnected time synchronized computers. These computers may be additionally time synchronized and interconnected to other networks of computers through a global communication system such as the global Internet.

Method for clock synchronization between nodes in a packet network

Abstract: A method and system for synchronizing clocks in a packet network that includes a master node and at least one slave node that communicate with one another is disclosed. A timer value from a master clock is retrieved upon transmission of a first packet to the slave node. The timer value and an associated code are subsequently sent to the slave node in a subsequent packet. After receiving the first packet, the slave node, retrieves a timer value from a slave clock and associates it with an identifying code of the first packet. After receiving the subsequent packet, the slave node relates the timer values and adjusts a clock value of the slave clock accordingly. An interrupt scheme may be used to implement the retrieval of the timer values.

Method and apparatus for synchronizing measurements taken by multiple metrology devices

Abstract: Apparatus includes at least two devices that communicate with each other, wherein a first one of the at least two devices having an IEEE 1588 precision time protocol interface, the interface including one or more components configured for communications in both a wired manner and a wireless manner with a second one of the at least two devices. The second one of the at least two devices having an IEEE 1588 precision time protocol interface, the interface including one or more components configured for communications in both a wired manner and a wireless manner with the first one of the at least two devices. Wherein one of the at least two devices includes a master clock and the other one of the at least two devices includes a slave clock, wherein the master clock communicates a time to the slave clock and the slave clock is responsive to the communicated time from the master clock to adjust a time of the slave clock if necessary to substantially correspond to the time of the master clock, thereby time synchronizing the at least two devices together.