Multiplex communications – Wide area network – Packet switching
Patent
1995-02-27
1996-02-20
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 953, H04J 316
Patent
active
054935695
ABSTRACT:
A packet transmission system (100) for reducing request traffic contention and the likelihood of resource misallocation includes a communications controller (110) and a plurality of remote requesting units (112) requesting packet transmission services. In response to receipt of a request (302), the controller (110) transmits a grant (306) to a requesting unit (112) when packet transmission resources (304 & 310) are available or a request acknowledgment (306) when packet transmission resources (304 & 310) are unavailable. Each remote unit (112) comprise apparatus structure and method steps for transmitting requests (302) to the controller (110) and starting a first timer having an interval (T) determined as a function of a number (Q) of outstanding requests (302). Upon receipt of an acknowledgement (306), the remote unit (112) starts a second timer having an interval (T.sub.1) longer than the interval (T). Upon expiration of either the first timer or the second timer, the remote unit (112) will then and only then transmit a duplicate request (302). By limiting the number of duplicate requests transmitted by a remote unit (112), the present invention operates to reduce request traffic contention and the likelihood of resource misallocation.
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Buchholz Dale R.
Doss William K.
Hamilton, Jr. R. Lee
Robbins Karen E.
Hillman ValJean
Motorola Inc.
Nguyen Chau T.
Olms Douglas W.
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