Patent EP0480527A2 successfully refreshed from Google Patents.
EP0480527A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Test apparatus
Assignee: D2B Systems Co Ltd
•
Filing: 1991-10-08
•
Granted: —
•
Expires: 2011-10-08
Abstract
Abstract The test apparatus (PC,KB,DIS,PR,IF) communicates via a standard serial bus (12) with a device under test (DUT) to verify conformity with a standard application protocol defining the format, meaning and applicability of messages passed via the bus (12). The apparatus generates a test sequence of commands and requests and analyses the replies of the DUT for conformity. The test sequence and the analysis are adapted automatically in response to previous replies of the device, to provide a thorough but efficient test of the device and any subdevices identified within it. Where the standard application protocol defines extended autonomous cooperation between devices, the test apparatus emulates one or more further devices to be controlled and interrogated by the device under test.
Inventors
- 👤 Stephen Charles Theobald
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 07:30
CPC Classifications
G; G06; G06F; G06F11/00; G06F11/22; H; H04; H04L; H04L43/00; H04L43/50; H04L43/18; H04L69/00; H04L69/02; H04L9/00; H04L9/40
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A test apparatus for verifying the conformity of a device under test with a standard application protocol defining the format, meaning and applicability of messages to be received and transmitted by the device under test, the apparatus comprising test sequencing means for generating and supplying to the device under test a test sequence of messages and for analysing messages returned by the device under test in response, to determine conformity or not with the standard application protocol.
Claim 2
Dependent Claim
28 words
A test apparatus as claimed in Claim 1 wherein the test sequence of messages is determined dynamically in response to the messages returned by the device under test.
Claim 3
Dependent Claim
68 words
A test apparatus as claimed in Claim 2 wherein the test sequencing means includes means for analysing messages returned by the device under test to identify one or more subdevices within the device, a plurality of modules for generating test sequences specific to different types of subdevice defined by the application protocol, and means for selectively activating modules appropriate to the subdevices identified in the device under test.
Claim 4
Dependent Claim
35 words
A test apparatus as claimed in any of Claims 1 to 3 wherein the test sequencing means includes a first module for generating and analysing messages concerning the static properties of the device under test.
Claim 5
Dependent Claim
42 words
A test apparatus as claimed in Claim 4 wherein the test sequencing means further includes modules for generating and analysing messages concerning static properties of respective types of subdevice, these modules being activated selectively in response to outputs of the first module.
Claim 6
Dependent Claim
36 words
A test apparatus as claimed in Claim 4 or 5 wherein the test sequencing means further includes one or more modules for generating and analysing messages concerning dynamic properties of the device and/or respective subdevice types.
Claim 7
Dependent Claim
82 words
A test apparatus as claimed in any preceding claim wherein the test sequencing means includes means for generating a message requiring a message to be returned by the device under test in reply, means for determining a set of one or more expected replies dependent on the standard application protocol and messages received previously from the device under test, and means for indicating non-conformity with the application protocol when the received message is not a member of the set of expected messages.
Claim 8
Dependent Claim
76 words
A test apparatus as claimed in any preceding claim, wherein the standard application protocol defines at least one standard application, whereby the device under test is required to act autonomously to transmit and receive a sequence of messages to and from at least one further device, the test sequencing means including means for emulating such a further device, by responding to the messages transmitted by the device under test in accordance with the defined standard application.
Claim 9
Dependent Claim
55 words
A test apparatus as claimed in Claim 8, wherein the emulating means comprises means for storing a set of variables defining a present state of the emulated device, and means for generating and transmitting messages to the device under test in accordance with the application protocol and the stored present state of the emulated device.
Claim 10
Dependent Claim
30 words
A test apparatus as claimed in Claim 9, wherein the emulating means comprises means for emulating a plurality of further devices, each emulated device communicating with the device under test.
Claim 11
Dependent Claim
33 words
A test apparatus as claimed in any preceding claim, wherein the messages and messages supplied to and returned by the device under test are sent via a standard serial bus having distributed control.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.