Reliable transmission device and method under short-wave channel

Abstract

The invention discloses a reliable transmission device and method under a short-wave channel, and belongs to the field of data communication. The device comprises a group of receiving and sending terminals, and the method comprises the following steps of: synchronizing signaling between the receiving and sending terminals; grouping, fragmenting and spliting a sent message by a receiving and sending terminal, setting a key fragment for each group, and sending the current group of the message when the channel is idle; starting timeout timing , and waiting for a key fragment receipt; if the receiving and sending terminal receives the key fragment receipt, processing receipt information; if the receiving and sending terminal does not receive the key fragment receipt sent from the receiving andsending terminal that receives the message when the timeout period for the receiving and sending terminal to wait for the key fragment receipt is greater than a timeout threshold T, comparing the times that the timeout period is greater than the timeout threshold T with the set timeout times C, and executing corresponding operation according to a comparison result; and repeating the above steps to send other groups of the message, and after all the groups of the message are sent successfully, setting the message state to be successful and reporting the message state to the user.

Description

technical field

[0001] The invention belongs to the field of data communication, and in particular relates to a reliable transmission device and method under a short-wave channel. Background technique

[0002] Short-wave communication is a long-distance communication method. Compared with other communication methods, its reliability and convenience are poor, mainly due to channel instability and high bit error rate due to electromagnetic or weather effects; in addition, for cost saving Considering that short-wave communication usually adopts half-duplex mode, coupled with the low communication rate of short-wave itself, it is difficult to implement a complex algorithm such as TCP on short-wave channels where the return receipt is uncontrollable and the timeout time does not consider the channel time.

[0003] Because the short-wave communication itself can reach thousands of kilometers, it does not need a relay station in actual use. Compared with satellite and other communi...

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