Wireless computer system with shared printer
First Claim
1. A wireless printer common system for enabling several personal computers to share a single printer, comprisingfirst 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;
- andsecond 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.
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Accused Products
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.
129 Citations
8 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification