US 5,524,185 AGranted

Wireless computer system with shared printer

AssigneeHyundai Electronics Industries Co., Ltd.

InventorKweon Na

Life of this patent

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Abstract

A wireless common printer system capable of achieving a print operation in accordance with a priority sequence by, at the side of personal computers, differentially encoding data to be printed by use of pseudo noise codes allocated to the computers like intrinsic identifiers and transmitting the data after spreading it in a direct sequence and, at the side of printer, extracting data from those received from the computers by use of a despread spectrum technique utilizing matched filters having individual intrinsic identifier codes. Since the common printer system is the wireless system eliminating requirements of a separate printer switching unit and a printer cable, there is no limitation on the usable distance in so far as electric power of a certain radio frequency is kept. By virtue of this feature, the common printer system provide an enhanced convenience when it is applied to lap top computers and personal note book computers having a high movability.

Claims8

Dependent claims

A wireless printer common system for enabling several personal computers to share a single printer, comprising

first data transmitting and receiving means provided at each of the computers and adapted to transmit data to be printed to the printer by wireless communication and receive a signal from the printer by wireless communication;
and
second data transmitting and receiving means provided at the printer and adapted to simultaneously receive signals respectively transmitted from the computers, select one from the simultaneously received signals in accordance with a priority sequence, print the selected signal, and transmit a standby signal to the remaining computers, whose signals have not been printed yet, so that the remaining computers are at a standby state, whereby all the computers can achieve a code-divided multi-connection with the printer, wherein both the first and second data transmitting and receiving means employ spread spectrum modulation techniques to perform the transmit and receive functions, whereby the data is respectively spread and despread.

Dependencies are inferred from the claim text.

Facts

Application: 08/301,181Filed 6 Sep 1994
Priority: KR 1993-2929423 Dec 1993
Granted: 4 Jun 1996
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06F 3/1292
Specifically adapted to adopt a particular infrastructure: mobile client, e.g. wireless printing
G06F 3/1204
Improving or facilitating administration, e.g. print management: resulting in reduced user or operator actions, e.g. presetting, automatic…
G06F 3/1236
Specifically adapted to use a particular technique: connection management
G06F 3/1279
Specifically adapted to adopt a particular infrastructure: controller construction, e.g. aspects of the interface hardware