Communication coordinator for messages to be sent from at least

Details Communication coordinator for messages to be sent from at least Communication coordinator for messages to be sent from at least

1994-04-15

1997-02-25

Coleman, Eric

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

39520001, 340506, G06F 1500

Patent

active

056067054

ABSTRACT:
A computer has access to a number of data items available from at least one data source. The computer receives requests for the values of certain of these data items from a number of different clients which may be either devices external to the computer or application programs operating in a multitasking environment within the computer. As each request is received from a client, it is stored in a data item table. The computer replies to each client request in the data item table with a data item value available somewhere in the data item table. The computer updates older data item values held by the data item table by requesting those data item values from the data sources which provide them. The data item values supplied to clients are those from previously received data source replies if these replies are not too old. This reduces the number of requests for data item values which the data sources must handle, reduces traffic on a data link which might otherwise be overloaded, and reduces the delay in responding to client requests.

REFERENCES:
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patent: 5039980 (1991-08-01), Aggers et al.
patent: 5049873 (1991-09-01), Robins et al.
patent: 5155842 (1992-10-01), Rubin
patent: 5369570 (1994-11-01), Parad
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patent: 5388255 (1995-02-01), Pytlik et al.
patent: 5390138 (1995-02-01), Milne et al.
EP, A, 0 365,337 (Hewlett-Packard Co.) 25 Apr. 1990.
WO, A, 91/03017 (Microsoft Corp.) 7 Mar. 1991.

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