Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-06-17
1999-12-21
Beausoliel, Jr., Robert W.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
39550005, G06F 1100
Patent
active
060063416
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a magazine-related bus arrangement.
Earlier known magazine-related bus arrangements can be considered to comprise physically a number of backplane-related bus conductors, connected mechanically and electrically to backplane-related electrical contact devices which are coordinated with circuit board locations and which are orientated in columns and/or rows and form electric contact fields.
A selected number of bus conductors are disposed for signal transmission with a parallel signal structure.
The backplane-related electric contact devices are intended to coact with electric contact devices provided along one edge of a board with printed circuits, a circuit board.
A plurality of such circuit boards are positioned side-by-side and each circuit board coacts with a respective back-plane-related electric contact field so that a first circuit mounted on a circuit board is able to transmit signals to and receive signals from other circuits on one or more other circuit boards or vice versa, through the medium of bus conductors.
A magazine-related bus arrangement can logically be considered to consist of bus conductors and backplane-related electric contact devices and circuit-board associated electric contact surfaces and circuit-board related transmitter/receiver circuits associated with respective bus conductors.
Magazine-related bus arrangements of the category defined in the introduction are based on the use of a plurality of conductors extending at least between two electronic circuit arrangements, on which information is transmitted n parallel between the conductor-coupled circuit arrangements, normally in the form of digital signals.
Thus, a magazine to which the characteristic features of the invention can be applied will comprise a backplane having electric contact fields disposed in parallel columns (or rows), circuit boards capable of coating with said electric contact fields, and known means for maintaining one or more circuit boards having edge-related electric contact surfaces in mechanical and electrical coaction with respective columns of electric contact fields.
The electric contact fields include a column (or row) of electric contact devices with, among other things, a predetermined number of bus conductors with associated bus-related electric contact devices, said predetermined number being contingent on the signalling system and signal exchange concerned, wherein each of said electric contact devices is adapted for coaction with a corresponding bus-related, edge-disposed contact device on a circuit board inserted into the magazine.
The bus conductors are present in the least possible number, so as to afford non-redundant and non-error-tolerant parallel signal transmission of the digital signals.
One or more further group of bus connections can be used as redundant bus conductors for non-redundant parallel signal transmission, and further connections or conductors can be used for other signal exchanges, such as a signal exchange of lower priority than the applicable to the bus conductors.
The bus arrangement is designed to afford, via the backplane bus conductors, an information-carrying signal exchange between a first circuit array belonging to a first circuit board and one or more second circuit arrays belonging to one or more second circuit boards.
Thus, a number of bus-related parallel conductors are coupled together in the backplane with bus-related electric contact circuits for coaction with the circuit boards when said boards are in coaction with the backplane.
DEFINITIONS
So that the following description will be understood more easily, a definition is given below of the terms used in the description and in the Claims, although it will be understood that these definitions have no limiting effect on the scope of the invention. the magazine and providing mechanical and electrical contact with the electric contact devices on the circuit board. The electric contact devices are normally coordinated in columns/or rows to form circuit board
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Beausoliel, Jr. Robert W.
Iqbal Nadeem
Telefonaktiebolaget LM Ericsson
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