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In phase clock time in time touch treaty environment

A timetable, central technology used in synchronous signal speed/phase control, ring networks, time-division multiplexing systems, etc., to solve problems such as relying on communication controllers to function correctly, reducing costs and space requirements

Inactive Publication Date: 2005-06-29
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that it is heavily dependent on the correct functioning of the communication controller

Method used

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  • In phase clock time in time touch treaty environment
  • In phase clock time in time touch treaty environment
  • In phase clock time in time touch treaty environment

Examples

Experimental program
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Embodiment Construction

[0041] figure 1 An embodiment of an active star coupler is shown with communication nodes 10, 20 and 30 connected to a star point 40 via assigned bidirectional bus drivers 12, 22 and 32 and to a distribution unit 50 , the distribution unit 50 distributes the received data. Each bus driver 12, 22 and 32 includes a transmit path and a receive path implemented in a conventional manner using amplifiers AS and AE. The distribution unit 50 can, for example, be implemented digitally as a "finite state machine". Connected to the bus drivers 12 , 22 and 32 and the distribution unit 50 is a bus monitor 60 to which a master controller 70 is connected for controlling and configuring the bus monitor 60 . Each bus driver 12, 22, and 32 is equipped with an activity detector 14, 24, and 34, which is connected in the receive path of the associated bus driver 12, 22, and 32, so that it can identify activity on the receive path and They are reported to the bus monitor 60 . In the illustrated...

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PUM

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Abstract

The invention describes a method for the monitoring and management of data traffic in a communication system with several communication nodes which communicate via interfaces monitored by a bus monitor, comprising the following steps: a) provision of a predefined communication time schedule for all communication nodes, b) initialization of the bus monitor, c) synchronization of the communication time schedule of the bus monitor with the predefined communication time schedule executed by the communication nodes in a distributed arrangement, the synchronization taking place on the basis of activities observed at the interfaces, d) monitoring of the activities of the communication nodes by the bus monitor, e) comparison of the activities with the predefined communication time schedule, and f) deactivation of the interface for any communication node for which an activity not compatible with the predefined communication time schedule has been detected. A circuit arrangement and its use are also described.

Description

technical field [0001] The invention relates to a method and a circuit arrangement for monitoring and managing data traffic in a communication system with several communication nodes, with which it is possible to operate the communication system with autonomous media access control. Background technique [0002] Timing communication protocols are proposed for distributed real-time computer systems such as are used within the automotive industry. Such a communication procedure is described, for example, in S. polenda and G. Kroiss "TTP: 'Drive by Wire'ingreifbarer Nhe" Elektronik, No. 14, 1999, pp. 36 to 43 and in J. Berwanger et al. "FlexRay -The Communication System for Advanced Automotive Control Systems", SAE World Congress 2001. In these systems, medium access control is based on time division multiplexing methods such as TDMA (Time Division Multiple Access) with a static communication schedule defined in advance during system design. The schedule defines for each com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04J3/06H04L7/04H04L12/43H04L12/44
CPCH04J3/0652H04L7/08H04L12/43H04L12/44
Inventor M·津克P·W·H·霍伊特斯P·富尔曼恩
Owner NXP BV
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