Request repeat method for data communication
First Claim
1. A request repeat method for data communication comprising the steps of:
- (a) transmitting answering signal from a receiving station indicating readiness of reception of data;
(b) transmitting a data from a transmitting station to a receiving station;
(c) transmitting an ACK signal from said receiving station indicating a satisfactory reception of said data upon inspection of said data transmitted from said transmitting station to said receiving station;
(d) transmitting from said receiving station an NAK signal indicating the unsatisfactory reception of said data requesting to transmit said data again, when said data is not received by said receiving station in a fixed time after the receiving station transmitted said ACK signal to said transmitting station because the ACK signal has been missed due to an instantaneous transmission interruption or if an error has been found in said data;
wherein said NAK signal is repeatedly issued N times at the maximum number of issues until said receiving station is able to receive said second data when the transmission of the NAK signal or data has been missed repeatedly.
1 Assignment
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Accused Products
Abstract
A request repeat system for data communication in which the receiving station transmits a signal indicating the result of reception of data transmitted thereto from the transmitting station. The receiving station transmits a signal indicating the unsatisfactory data reception repeatedly N times at the maximum until the receiving station is able to receive the data normally to request the transmitting station to transmit the data again, when the receiving station does not receive the data in a prescribed time after the receiving station has transmitted the signal indicating the unsatisfactory reception of the data to the transmitting station. Thus, the request repeat system eliminates useless communication charge necessary for restarting data communication after interruption and repetition of operation for requesting the repeated transmission of data, and hence the request repeat system is particularly effectively applicable to mobile data communication.
52 Citations
10 Claims
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1. A request repeat method for data communication comprising the steps of:
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(a) transmitting answering signal from a receiving station indicating readiness of reception of data; (b) transmitting a data from a transmitting station to a receiving station; (c) transmitting an ACK signal from said receiving station indicating a satisfactory reception of said data upon inspection of said data transmitted from said transmitting station to said receiving station; (d) transmitting from said receiving station an NAK signal indicating the unsatisfactory reception of said data requesting to transmit said data again, when said data is not received by said receiving station in a fixed time after the receiving station transmitted said ACK signal to said transmitting station because the ACK signal has been missed due to an instantaneous transmission interruption or if an error has been found in said data; wherein said NAK signal is repeatedly issued N times at the maximum number of issues until said receiving station is able to receive said second data when the transmission of the NAK signal or data has been missed repeatedly. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification