CN102571572A - Short message satellite communication-based data transmission method and device - Google Patents

Abstract

The present invention provides a data transmission method and device based on short message satellite communication. The method includes: when a data packet is received and stored in a sending buffer queue, if the total data amount of the data packet is greater than the first data amount threshold, Or if the waiting time for sending is greater than the first time threshold, the data packets in the sending buffer queue will be integrated and compressed into the first compressed packet; if the compression ratio of the first compressed packet is greater than the first preset compression ratio, the first compressed packet will be compressed. The compressed package fragments are processed into multiple data fragments; add a fragment header for each data fragment respectively, add the logo to the fragment header, set the end indication bit in the fragment header of the last data fragment, and add the fragment header The data fragments are sent in order. The data transmission method and device based on short-message satellite communication provided by the present invention avoids the phenomenon of negative compression ratio, improves the capacity expansion effect of satellite communication data transmission data volume and the effective utilization rate of bandwidth resources.

Description

Data transmission method and device based on short message satellite communication

technical field

The invention relates to communication technology, in particular to a data transmission method and device based on short message satellite communication.

Background technique

Some geostationary earth orbit (Geostationary Earth Orbit, referred to as GEO) satellites have short message communication capabilities. This communication capability has two modes: one is short message communication between satellite communication terminals and terminals, and the other is satellite communication. Communication between the communication terminal and the short message central station. The short message communication system based on GEO satellite has wide coverage and strong applicability. However, due to the limited satellite communication capability and capacity, each short message is limited to several hundred bytes, and the frequency at which a single user can send short messages is often limited to a few seconds/time to tens of seconds/time Within the scope, these limitations restrict the application range of data communication technology based on GEO short message.

The communication mode based on GEO short messages can not only be used to transmit text short messages, but also can be used to transmit user binary data. However, applications such as binary data transmission require more bandwidth. The existing technology provides a method to expand the amount of transmitted data under the existing satellite-ground conditions. This method slices the binary data and slices the The data is compressed, and then the compressed data is transmitted in a short message. Since the data volume of a single short message is very limited, in practical applications, the compressed data generated after data compression for each short message is often larger than the original data volume. This negative compression phenomenon not only fails to save bandwidth, but also More bandwidth resources are wasted.

Contents of the invention

The invention provides a data transmission method and device based on short message satellite communication, so as to improve the capacity expansion effect of satellite communication data transmission data volume and improve the effective utilization rate of bandwidth resources.

The invention provides a data transmission method based on short message satellite communication, comprising:

When a data packet is received and stored in the sending buffer queue, if it is determined that the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or it is judged that the data packets in the sending buffer queue are waiting When the sending time is greater than the first time threshold, the data packets in the sending buffer queue are integrated and compressed into first compressed packets;

If it is judged that the compression ratio of the first compressed package is greater than the first preset compression ratio, the first compressed package is fragmented and processed into a plurality of data fragments;

Add a slice header respectively for each of the data slices, add an identifier to indicate the order in the slice header, set an end indicator in the slice header of the last data slice, and add the data fragments after the slice header The pieces are sent in order.

The invention provides a data transmission method based on short message satellite communication, comprising:

Save the received data fragments into the receive buffer queue;

If it is judged that there is an end indication bit in the fragment header of the received data fragments, then the fragment headers of the data fragments in the receiving buffer queue are removed, and the fragment headers are removed according to the identification order in the fragment headers. The data fragments are combined into a compressed package;

Decompressing and splitting the compressed package into multiple data packages.

The present invention provides a data transmission device based on short message satellite communication, comprising:

The first integrated compression module is used for when the data packet is received and stored in the sending buffer queue, if it is determined that the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or it is judged that the When the waiting time for the data packets in the sending buffer queue to be sent is greater than the first time threshold, the data packets in the sending buffer queue are integrated and compressed into a first compressed packet;

The first fragmentation module is used to process the fragmentation of the first compressed packet into a plurality of data fragments if it is determined that the compression ratio of the first compressed packet is greater than a first preset compression ratio;

The slice header processing module is used to add a slice header for each of the data slices, add an identifier to indicate the sequence to the slice header, set an end indication bit in the slice header of the last data slice, and set The data fragments after adding fragment headers are sent in order.

The present invention provides a data transmission device based on short message satellite communication, comprising:

The receiving module is used to save the received data fragments into the receiving buffer queue;

The compressed packet generation module is used to remove the fragmentation header of the data fragmentation in the receiving buffer queue if it is judged that there is an end indicator in the fragmentation header of the received data fragmentation, and according to the fragmentation header in the fragmentation header The identification order combines the data fragments without the fragment headers into a compressed package;

The data packet generating module is used for decompressing and splitting the compressed packet into multiple data packets.

It can be seen from the above-mentioned technical scheme that the data transmission method and device based on short message satellite communication provided by the present invention save and accumulate the data packets by storing the received data packets in the sending buffer queue, and the cached data volume is processed. Evaluate and evaluate the data buffer time. When the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or the waiting time of the data packets in the sending buffer queue is greater than the first time threshold, the sending buffer will be sent The data packets in the queue are integrated and compressed into a first compressed packet. Detecting the compression ratio of the compressed package, if the compression ratio is greater than the first preset compression ratio value, performing fragmentation processing on the first compressed package, adding a fragment header to indicate the order of the data fragments for each obtained data fragment, and Data fragments are sent in that order. The phenomenon of negative compression ratio is avoided, the expansion effect of satellite communication data transmission data volume is improved, and the effective utilization rate of bandwidth resources is improved.

Description of drawings

FIG. 1 is a flow chart of a data transmission method based on short message satellite communication provided by Embodiment 1 of the present invention;

FIG. 2 is a flowchart of a data transmission method based on short message satellite communication provided by Embodiment 2 of the present invention;

3 is a flowchart of a data transmission method based on short message satellite communication provided by Embodiment 3 of the present invention;

4 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 4 of the present invention;

5 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 5 of the present invention;

FIG. 6 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 6 of the present invention.

Detailed ways

Embodiment one

FIG. 1 is a flowchart of a data transmission method based on short message satellite communication provided by Embodiment 1 of the present invention. As shown in Figure 1, the data transmission method based on short message satellite communication provided by this embodiment can be specifically applied to the data transmission process of a sending device based on short message satellite communication, and the sending terminal can be a terminal or a short message message center. The data transmission method based on short message satellite communication provided by this embodiment specifically includes:

Step S10, when the data packet is received and stored in the sending buffer queue, if it is determined that the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or it is judged that the data packets in the sending buffer queue are waiting to be sent time is greater than the first time threshold, then the data packets in the sending buffer queue are integrated and compressed into the first compressed packet;

Specifically, the data packet may be an application data packet received according to the data transmission application request of the application layer, and the received data packet is stored in the sending buffer queue to cache and accumulate the data packet. Judging the total data volume of all data packets in the sending buffer queue and the waiting time for these data packets to be sent, specifically, adding the size of all data packets in the sending buffer queue, and the preset data volume low threshold That is, the first data volume threshold is compared, and at the same time, the interval from the last sending time is compared with the preset time low threshold, that is, the first time threshold. If the total data volume of the data packet is greater than the first data volume threshold, or waiting to be sent If the time is greater than the first time threshold, the data packets in the sending buffer queue are integrated and compressed into a first compressed packet. Specifically, all data packets in the sending buffer queue may be spliced to form a continuous data block. On the basis of integration, the preset compression algorithm is used to compress the data.

Step S20, if it is judged that the compression ratio of the first compressed package is greater than the first preset compression ratio, the first compressed package is segmented into multiple data segments;

If the compression ratio of the first compressed package is greater than the first preset compression ratio, it means that the compression effect of the first compressed package has reached the expected value, so as to avoid the negative compression phenomenon caused by the compressed compressed package being larger than the original data. Fragmenting the first compressed package into multiple data fragments. Specifically, according to the maximum short message size and the size of the short message, the first compressed packet is cut into multiple fragments to obtain multiple slices, except for the last slice, the size of the remaining slices is the maximum value of the short message data volume, If the size of the last slice is smaller than the maximum short packet size, use 0 to make up to the maximum size of the short packet. In this way, the data fragments obtained by fragmenting the first compressed package have the same size.

Step S30, adding slice headers respectively for each data slice, adding an identifier to indicate the order in the slice header, setting an end indication bit in the slice header of the last data slice, and adding the data slices of the slice header according to sent sequentially.

Add a fragment header before each data fragment, and add an identifier to indicate the sequence to the fragment header. The identifier can be 1 to n, where n is a natural number and n>1. For the last data fragment, Set the end indication bit in its fragment header to indicate the end of the combined packet. Specifically, the highest bit of the slice header of the last data slice may be set to 1, while the highest bits of the slice headers of other data slices are all 0. Send the data fragments after adding the fragment header in order, that is, send the data fragments after adding the fragment header to the satellite smoothly from 1 to n.

The data transmission method based on short-message satellite communication provided by this embodiment stores the received data packets in the sending buffer queue to cache and accumulate the data packets, evaluates the amount of cached data and calculates the data cache time. Evaluation, when the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or the waiting time for the data packets in the sending buffer queue to be sent is greater than the first time threshold, the data packets in the sending buffer queue will be integrated, The compression is processed into a first compressed package. Detecting the compression ratio of the compressed package, if the compression ratio is greater than the first preset compression ratio value, performing fragmentation processing on the first compressed package, adding a fragment header to indicate the order of the data fragments for each obtained data fragment, and Data fragments are sent in that order. The phenomenon of negative compression ratio is avoided, the expansion effect of satellite communication data transmission data volume is improved, and the effective utilization rate of bandwidth resources is improved.

Embodiment two

FIG. 2 is a flowchart of a data transmission method based on short message satellite communication provided by Embodiment 2 of the present invention. As shown in Figure 2, the data transmission method based on short message satellite communication provided by this embodiment is after integrating and compressing the data packets in the buffer queue into the first compressed packet in Embodiment 1, and dividing the data into the first compressed packet. Before adding slice headers to slices, the following steps may be included:

Step S40, if it is judged that the compression ratio of the compressed packet is not greater than the preset compression ratio, then continue to save the received data packet in the sending buffer queue, if it is judged that the total data volume of the data packet in the buffer queue is greater than the second data volume threshold, or the waiting time for the data packets in the buffer queue to be sent is greater than the second time threshold, then the data packets in the buffer queue are integrated and compressed into a second compressed packet, wherein the second data volume threshold is greater than the first data volume threshold , the second time threshold is greater than the first time threshold;

If the compression ratio of the compressed package is not greater than the preset compression ratio, it means that the effect of the first compressed package has not reached the expected value, and is even larger than the original data, that is, negative compression occurs. Then discard the first compressed packet, continue to receive data packets, and store the received data packets in the sending buffer queue. Until the total data volume of the data packets in the sending buffer queue is greater than the preset data volume high threshold, that is, the second data volume threshold, or the waiting time for sending is greater than the time preset time low threshold, that is, the second time threshold, then the data packets in the buffer queue The data packets are integrated and compressed to form a second compressed packet.

Step S50, if it is determined that the compression ratio of the second compressed package is greater than the second preset compression ratio, split the second compressed package into a plurality of data fragments.

The compression ratio of the second compressed package is further detected, and if the compression ratio of the second compressed package is greater than a second preset compression ratio value, the second compressed package is fragmented and processed into multiple data fragments. Specifically, the second preset compression ratio may be equal to the first preset compression ratio.

If at this time, the compression ratio of the second compressed packet still does not reach the second preset compression ratio, or the second compressed packet is larger than the original data, it means that the total data volume of the data packets in the sending buffer queue is relatively small, and A large number of packets have not been received for a long time. Then, the data packets in the sending buffer queue can be integrated to form a composite packet, but the composite packet is not compressed, and the composite packet is directly fragmented to obtain data fragments, and then the step of adding a fragment header to each data fragment is performed.

In this embodiment, after the fragmentation of the first compressed package is processed into multiple data fragments, and before each data fragment is respectively added with a fragment header, it may specifically include:

Step S60, performing bitwise XOR processing on each data fragment to generate redundant fragments;

Specifically, according to the order of the data fragments, the content of the data fragments can be sequentially calculated according to the bitwise XOR operation to obtain a redundant fragment.

Correspondingly, in step S30, a slice header is added for each data slice respectively, an identifier for indicating the sequence is added to the slice header, an end indication bit is set in the slice header of the last data slice, and the added slice header is The data fragments are sent in sequence, which may include the following steps:

Step S301, adding a fragment header to the redundant fragment and each data fragment respectively;

Step S302, adding an identifier for indicating the order to the slice header, setting an end indication bit in the slice header of the last data slice, wherein the order of the redundant slices is prior to each data slice;

Specifically, the identifier in the slice header of the redundant slice may be 0, and the identifiers in the slice header of the data slice are respectively 1 to n, wherein n is a natural number and n>1.

Step S303, sending the redundant fragments and data fragments in sequence after adding the fragment header.

The redundant fragments and data fragments after adding fragment headers are sent to the satellite smoothly according to the sequence from 0, 1 to n.

Because the satellite communication method based on short messages uses wireless microwave to send data, it may be affected by various meteorological conditions, ionosphere and other environments, and short messages will be interfered and lost during transmission, or errors will occur during transmission. When receiving data, the wrong short message will be detected by the receiving device through the redundancy check code and discarded. Through the redundant fragments generated according to the data fragmentation, when one of the received data fragments is lost, the lost data fragments can be recovered through data fragmentation and redundant fragmentation, which improves the stability of data transmission .

Embodiment Three

FIG. 3 is a flowchart of a data transmission method based on short message satellite communication provided by Embodiment 3 of the present invention. As shown in Figure 3, the data transmission method based on short message satellite communication provided by this embodiment can be specifically applied to the data receiving process of a receiving device based on short message satellite communication, and the transmission termination can be either a terminal or a short message message center. The data transmission method based on short message satellite communication provided by this embodiment specifically includes:

Step R10, saving the received data fragments into the receiving buffer queue;

Specifically, the data fragments sent by the satellite are received, and the received data fragments are stored in the receiving buffer queue, so that subsequent processing can be performed after all the data fragments are received.

Step R20, if it is judged that there is an end indication bit in the header of the received data slice, remove the header of the data slice in the receiving buffer queue, and remove the data in the header according to the order of identification in the header Fragments are combined into a compressed package;

If there is an end indication bit in the fragment header of the received data fragment, indicating that the data fragment is the last data fragment, then the data fragments in the receiving buffer queue can be taken out of the fragment header and combined into compressed packets.

Step R30, decompressing and splitting the compressed package into multiple data packages.

Specifically, the compressed package may be firstly decompressed and processed into a combined package, and then the combined package is split into multiple data packages according to the header information of each original data package. When the data volume of the compressed package sent by the sender is not greater than the sum of the data volumes of multiple data packages, the sum of the data volumes obtained by decompressing the compressed package and splitting the multiple data packages obtained by the receiver is not less than the data volume of the compressed package .

The data transmission method based on short message satellite communication provided by this embodiment, after receiving all the data fragments, the data fragments are taken out of the fragment headers and combined into compressed packets, and the compressed packets are decompressed and split into multiple data Bag. It can cooperate with the data processing process of the sender. When the data volume of the compressed packet generated by the sender is not greater than the sum of the data volume of multiple data packets, it means that there is no negative compression phenomenon, which improves the expansion effect of the satellite communication data transmission data volume. , improving the effective utilization of bandwidth resources.

In this embodiment, in step R10, the received data fragments are stored in the receiving buffer queue, which may specifically include:

Save the received redundant fragments and data fragments to the receiving buffer queue;

If the data sent by the satellite also includes redundant fragments, both the received redundant fragments and data fragments are stored in the receiving buffer queue.

Correspondingly, in step R20, if it is judged that there is an end indication bit in the header of the received data fragment, then the header of the data fragment in the receiving buffer queue is removed, and the removed fragments are removed according to the order of identification in the header. The data slices of the header are combined into a compressed package, which may specifically include the following steps:

If it is judged that there is an end indication bit in the fragment header of the received data fragment, then check the continuity of the identification in the fragment header of the received data fragment, if it is judged that a data fragment is lost, then according to the receiving buffer queue The data fragments and redundant fragments in generate lost data fragments, remove the fragment headers of each data fragment, and combine the data fragments without fragment headers into a compressed package according to the identification order in the fragment headers.

Further check the continuity of the received data fragments to know whether the data fragments are lost during transmission. If a data fragment is lost during data transmission, the lost data fragment can be restored by bitwise XOR processing according to the redundant fragment and the remaining data fragments.

During the actual data receiving process, the received fragments can be processed according to the agreed data transmission rules with the sender. If the sender sets the identifier of redundant fragments to 0 and the identifiers of data fragments to 1 to n in sequence, it may first determine whether the identifier in the fragment header of the received fragment is 0. If it is 0, it means that the received fragment is a redundant fragment. Determine whether the last data fragment of the previous composite packet has been received. If the last data fragment of the previous combined packet is not received, it means that the last data fragment is lost. Perform bitwise XOR processing on all fragments (including data fragments and redundant fragments) in the previous combined package, and recover the last lost fragment. Once the previous combined package is complete, the next combination of data fragments can be performed. Specifically, after removing the combination of slice headers from each data slice, it is also possible to first determine whether the combined data has undergone compression processing, and if not, the combined data can be directly split into multiple data packets.

If the previous composite packet is complete, then continue to receive other remaining data fragments until the last data fragment of the composite packet is received. Check whether there are missing data fragments according to the identification in the fragment header of the data fragments. Determine whether the number of lost fragments is more than one, and discard all fragments associated with the combined data packet if there are multiple lost fragments. If a data fragment is lost, the data fragment can be recovered according to the above data fragment recovery method. If the lost fragment is redundant, it has no effect on further data processing.

Embodiment four

FIG. 4 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 4 of the present invention. As shown in Figure 4, the data transmission device based on short message satellite communication provided by this embodiment can specifically implement the various steps of the data transmission method based on short message satellite communication applied to data transmission provided by any embodiment of the present invention, This will not be repeated here. The data transmission device based on short message satellite communication provided in this embodiment can be integrated in a terminal or a short message center, or can be set separately, and is not limited to this embodiment.

The data transmission device based on short message satellite communication provided in this embodiment specifically includes a first integrated compression module 11 , a first fragmentation module 12 and a fragmentation header processing module 13 . The first integration compression module 11 is used for when receiving data packets and saving them in the sending buffer queue, if it is judged that the total data volume of the data packets in the buffer queue is greater than the first data volume threshold, or it is judged that the data in the buffer queue is known If the waiting time for the packet to be sent is greater than the first time threshold, the data packets in the buffer queue are integrated and compressed into a first compressed packet. The first fragmentation module 12 is configured to fragment the first compressed packet into multiple data fragments if it is determined that the compression ratio of the first compressed packet is greater than a first preset compression ratio. Fragmentation header processing module 13 is used for adding fragmentation header respectively for each data fragmentation, will be added in the fragmentation header in order to indicate the mark of sequence, end indication bit is set in the fragmentation header of last data fragmentation, will add fragmentation header The data fragments are sent in order.

The data transmission device based on the short message satellite communication provided by the present embodiment saves the received data packets in the sending buffer queue to cache and accumulate the data packets through the setting of the first integrated compression module 11, and the amount of data in the buffer Evaluate and evaluate the data buffer time. When the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or the waiting time of the data packets in the sending buffer queue is greater than the first time threshold, it will send The data packets in the buffer queue are integrated and compressed into a first compressed packet. The first fragmentation module 12 detects the compression ratio of the compressed package, and if the compression ratio is greater than the first preset compression ratio, performs fragmentation processing on the first compressed packet. The slice header processing module 13 adds a slice header to each obtained data slice to indicate the order of the data slices, and sends the data slices according to the order. The phenomenon of negative compression ratio is avoided, the expansion effect of satellite communication data transmission data volume is improved, and the effective utilization rate of bandwidth resources is improved.

Embodiment five

FIG. 5 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 5 of the present invention. As shown in FIG. 5 , in this embodiment, the short message satellite communication-based data transmission device may specifically include a second integrated compression module 14 and a second fragmentation module 15 . The second integrated compression module 14 is used for if judging and knowing that the compression ratio of the compressed packet is not greater than the preset compression ratio, then continue to save the received data packet in the sending buffer queue, if judging the total data of the data packet in the buffer queue If the amount is greater than the second data volume threshold, or the waiting time for the data packets in the buffer queue to be sent is greater than the second time threshold, then the data packets in the buffer queue are integrated and compressed into a second compressed packet. The second fragmentation module 15 is used for if judging that the compression ratio of the second compressed packet is greater than the second preset compression ratio, the second compressed packet is fragmented and processed into a plurality of data fragments, wherein the second data volume threshold is greater than the first A data volume threshold, the second time threshold is greater than the first time threshold.

In this embodiment, the data transmission device based on short-message satellite communication may also include a redundant fragment generation module 16, and the redundant fragment generation module 16 is used to process and generate each data fragment by bitwise XOR Redundant sharding. Correspondingly, the slice header processing module 13 includes a slice header adding unit 131 , an identifier adding unit 132 and a sending unit 133 . The slice header adding unit 131 is used to add slice headers to the redundant slice and each data slice respectively. The identifier adding unit 132 is used to add an identifier for indicating the sequence to the slice header, and set an end indication bit in the slice header of the last data slice, wherein the sequence of the redundant slice is prior to each data slice. The sending unit 133 is configured to send the redundant fragment and the data fragment after adding the fragment header in order.

Embodiment six

FIG. 6 is a schematic structural diagram of a data transmission device based on short message satellite communication provided by Embodiment 6 of the present invention. As shown in Figure 6, the data transmission device based on short message satellite communication provided by this embodiment can specifically implement the various steps of the data transmission method based on short message satellite communication applied to data reception provided by any embodiment of the present invention, This will not be repeated here. The data transmission device based on short message satellite communication provided in this embodiment can be integrated in a terminal or a short message center, or can be set separately, and is not limited to this embodiment.

The data transmission device based on short message satellite communication provided in this embodiment specifically includes a receiving module 21 , a compressed packet generating module 22 and a data packet generating module 23 . The receiving module 21 is used for saving the received data fragments into the receiving buffer queue. The compressed packet generation module 22 is used to remove the fragmentation header of the data fragmentation in the receiving buffer queue if it is judged that there is an end indicator in the fragmentation header of the data fragmentation received, and remove the fragmentation according to the identification order in the fragmentation header. The data fragments of the fragment header are combined into a compressed package. The data packet generating module 23 is used for decompressing and splitting the compressed packet into data packets.

The data transmission device based on short message satellite communication provided by this embodiment, after receiving all the data fragments, the data fragments are taken out of the fragment headers and combined into compressed packets, and the compressed packets are decompressed and split into multiple data Bag. Since the data volume of the compressed package is not greater than the sum of the data volumes of multiple data packages, it shows that there is no negative compression phenomenon, which improves the expansion effect of the satellite communication data transmission data volume and improves the effective utilization rate of bandwidth resources.

In this embodiment, the receiving module 21 may also be configured to save the received redundant fragments and data fragments into the receiving buffer queue. Correspondingly, the compressed packet generation module 22 is also used for if judging that there is an end indication bit in the slice header of the received data slice, then checking the continuity of the identifier in the slice header of the received data slice, if it is judged that If a data fragment is lost, the lost data fragments will be generated according to the data fragments and redundant fragments in the receiving buffer queue, the fragment headers of each data fragment will be removed, and the fragment headers will be removed according to the identification order in the fragment headers. The data fragments are combined into a compressed package.

The data transmission method and device based on short message satellite communication provided by the embodiment of the present invention can transmit application data efficiently and flexibly based on the technology based on short message satellite communication, expand the data transmission capacity to a certain extent, and Automatic data recovery can be performed when the number of data fragments lost in each transmission is not more than one, ensuring transmission reliability.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (10)

1. A data transmission method based on short message satellite communication, characterized in that, comprising: When a data packet is received and stored in the sending buffer queue, if it is determined that the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or it is judged that the data packets in the sending buffer queue are waiting When the sending time is greater than the first time threshold, the data packets in the sending buffer queue are integrated and compressed into first compressed packets; If it is judged that the compression ratio of the first compressed package is greater than the first preset compression ratio, the first compressed package is fragmented and processed into a plurality of data fragments; Add a slice header respectively for each of the data slices, add an identifier to indicate the order in the slice header, set an end indicator in the slice header of the last data slice, and add the data fragments after the slice header The pieces are sent in order. 2. the data transmission method based on short message satellite communication according to claim 1, is characterized in that, after described data packet in the described transmission buffer queue is integrated, compressed into the first compressed packet, described as Before each of the data fragments respectively adds a fragment header, it also includes: If it is judged that the compression ratio of the first compressed packet is not greater than the preset compression ratio, then continue to store the received data packet in the sending buffer queue, if it is judged that the data packet in the buffer queue is If the total data volume is greater than the second data volume threshold, or the waiting time for the data packets in the sending buffer queue to be sent is greater than the second time threshold, then the data packets in the sending buffer queue are integrated and compressed into a second compressed packet , wherein the second data volume threshold is greater than the first data volume threshold, and the second time threshold is greater than the first time threshold; If it is determined that the compression ratio of the second compressed package is greater than a second preset compression ratio, the second compressed package is segmented into a plurality of data segments. 3. the data transmission method based on short message satellite communication according to claim 1, is characterized in that, after described first compressed packet fragmentation is processed into a plurality of data fragmentation, described for each described Before data fragmentation adds fragmentation headers, it also includes: performing bit-wise XOR processing on each of the data fragments to generate redundant fragments; Correspondingly, adding a slice header for each of the data slices, adding an identifier to indicate the sequence to the slice header, setting an end indication bit in the slice header of the last data slice, adding the The data fragments after the header are sent in order, including: Adding a fragment header to the redundant fragment and each of the data fragments; Adding an identifier to indicate the sequence to the fragment header, setting an end indication bit in the fragment header of the last data fragment, wherein the order of the redundant fragments is prior to each of the data fragments; The redundant fragments and data fragments after adding fragment headers are sent in order. 4. A data transmission method based on short message satellite communication, characterized in that, comprising: Save the received data fragments into the receive buffer queue; If it is judged that there is an end indication bit in the fragment header of the received data fragments, then the fragment headers of the data fragments in the receiving buffer queue are removed, and the fragment headers are removed according to the identification order in the fragment headers. The data fragments are combined into a compressed package; Decompressing and splitting the compressed package into multiple data packages. 5. the data transmission method based on short message satellite communication according to claim 4, is characterized in that, described data fragmentation that is received is saved in the receiving buffer formation, comprises: saving the received redundant fragments and the data fragments into the receiving buffer queue; Correspondingly, if it is judged that there is an end indication bit in the header of the received data fragments, then the headers of the data fragments in the receiving buffer queue are removed, and the sequence of identifications in the headers is followed. Combine the data fragments without fragment headers into a compressed package, including: If it is judged that there is the end indication bit in the fragment header of the received data fragment, then check the continuity of the identifier in the fragment header of the received data fragment, if it is judged that a data fragment is lost, then according to the The data fragments and redundant fragments in the receiving buffer queue generate lost data fragments, remove the fragment headers of each of the data fragments, and divide the data fragments without the fragment headers according to the identification order in the fragment headers The slices are assembled into the compressed package. 6. A data transmission device based on short message satellite communication, characterized in that, comprising: The first integrated compression module is used for when the data packet is received and stored in the sending buffer queue, if it is determined that the total data volume of the data packets in the sending buffer queue is greater than the first data volume threshold, or it is judged that the When the waiting time for the data packets in the sending buffer queue to be sent is greater than the first time threshold, the data packets in the sending buffer queue are integrated and compressed into a first compressed packet; The first fragmentation module is used to process the fragmentation of the first compressed packet into a plurality of data fragments if it is determined that the compression ratio of the first compressed packet is greater than a first preset compression ratio; The slice header processing module is used to add a slice header for each of the data slices, add an identifier to indicate the sequence to the slice header, set an end indication bit in the slice header of the last data slice, and set The data fragments after adding fragment headers are sent in order. 7. the data transmission device based on short message satellite communication according to claim 6, is characterized in that, also comprises: The second integrated compression module is used to continue to store the received data packets in the sending buffer queue if it is determined that the compression ratio of the first compressed packet is not greater than the preset compression ratio, and if it is determined that the compression ratio of the first compressed packet is known The total data volume of the data packets in the sending buffer queue is greater than the second data volume threshold, or the waiting time for the data packets in the sending buffer queue to be sent is greater than the second time threshold, then the data packets in the sending buffer queue Integrating and compressing into a second compressed package, wherein the second data volume threshold is greater than the first data volume threshold, and the second time threshold is greater than the first time threshold; The second fragmentation module is configured to fragment the second compressed packet into a plurality of data fragments if it is determined that the compression ratio of the second compressed packet is greater than a second preset compression ratio. 8. the data transmission device based on short message satellite communication according to claim 6, is characterized in that, also comprises: A redundant slice generation module, configured to perform bitwise XOR processing on each of the data slices to generate redundant slices; Correspondingly, the slice header processing module includes: A slice header adding unit, configured to add a slice header to the redundant slice and each of the data slices; An identifier adding unit, configured to add an identifier for indicating the order to the fragment header, and set an end indication bit in the fragment header of the last data fragment, wherein the order of the redundant fragments is prior to each of the redundant fragments data fragmentation; The sending unit is configured to send the redundant fragment and the data fragment after adding the fragment header in order. 9. A data transmission device based on short message satellite communication, characterized in that, comprising: The receiving module is used to save the received data fragments into the receiving buffer queue; The compressed packet generation module is used to remove the fragmentation header of the data fragmentation in the receiving buffer queue if it is judged that there is an end indicator in the fragmentation header of the received data fragmentation, and according to the fragmentation header in the fragmentation header The identification order combines the data fragments without the fragment headers into a compressed package; The data packet generating module is used for decompressing and splitting the compressed packet into multiple data packets. 10. The data transmission device based on short message satellite communication according to claim 6, characterized in that: the receiving module is also used to save the received redundant fragments and the data fragments to the receiving module in the buffer queue; Correspondingly, the compressed packet generation module is also used to check the continuity of the identifier in the fragment header of the received data fragment if it is judged that the end indication bit exists in the fragment header of the received data fragment, If it is judged that a data fragment is lost, the lost data fragment is generated according to the data fragments and redundant fragments in the receiving buffer queue, the fragment header of each data fragment is removed, and the The identification sequence in the slice header combines the data slices without the slice headers into the compressed package.

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