JP2001320419A5 - - Google Patents

Description

[Claims]
1. A data transmission method for sequentially transmitting information from a transmitting side to a receiving side for each transmission information corresponding to a packet.
An uncompressed packet in which predetermined transmission information is stored as uncompressed information is transmitted, and a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information is continuously transmitted. Sender processing and
Includes receiving-side processing that receives each packet from the transmitting side and restores the transmission information corresponding to each packet based on the uncompressed information and compressed information stored in each packet.
In the transmitting side processing, the compressed information to be stored in the compressed packet to be transmitted is divided into the transmission information corresponding to the reference packet which is the uncompressed packet and the transmission information corresponding to the target packet as the transmission target. Including compression processing to create based on
The receiving side processing restores the transmission information corresponding to the compressed packet to be restored based on the transmission information corresponding to the reference packet and the compressed information included in the compressed packet to be restored. A data transmission method comprising.
2. In the data transmission method according to claim 1,
In the above sender processing,
As the uncompressed packet, a packet including the packet identifier indicating the packet is transmitted together with the uncompressed information, and as each compressed packet following the uncompressed packet, a reference packet identifier indicating the uncompressed packet as the reference packet is used. Send the packet containing the compressed information,
The data transmission process is characterized in that, in the compression process, difference information between the transmission information corresponding to the reference packet and the transmission information corresponding to the compressed packet is created as the compression information.
3. In the data transmission method according to claim 2,
In the transmission side processing, the compressed packet stores additional information for calculating the difference information based on the transmission information corresponding to the reference packet.
The receiving side processing is a data transmission method characterized in that the difference information in the compressed packet is calculated from the transmission information corresponding to the reference packet based on the additional information in the compressed packet.
4. In the data transmission method according to claim 3,
The additional information is a data transmission method characterized in that the compressed packet is a sequence number capable of identifying the number of the uncompressed packet transmitted as the reference packet after the transmission of the uncompressed packet.
5. In the data transmission method according to claim 3,
The data transmission method is characterized in that the additional information is a variable of a calculation formula for calculating the difference information in the compressed packet from the transmission information corresponding to the reference packet.
6. In the data transmission method according to claim 2,
In the above sender processing,
A plurality of uncompressed packets created to be transmitted before the compressed packet are used as reference packets, and the compressed packet includes transmission information corresponding to each of the reference packets and transmission information corresponding to the compressed packet. The difference information of the above is associated with the reference packet identifier corresponding to each of the above reference packets, and a plurality of sets of the corresponding difference information and the reference packet identifier are stored as the above-mentioned compressed information.
In the receiving side processing, a data transmission method characterized in that the transmission information corresponding to the compressed packet is restored by using any set of difference information and the packet identifier in the compressed packet.
7. In the data transmission method according to claim 1,
The data transmission method is characterized in that the transmission side processing transmits the uncompressed packet at a fixed cycle.
8. In the data transmission method according to claim 1,
The data transmission method is characterized in that, in the transmission side processing, when the size of the compressed information included in the compressed packet to be transmitted to the receiving side exceeds a certain value, the uncompressed packet is transmitted.
9. In the data transmission method according to claim 1,
In the above receiving side processing, when the size of the compressed information contained in the compressed packet from the transmitting side exceeds a certain value, the transmitting side is requested to transmit the uncompressed packet.
The data transmission method is characterized in that, in the transmission side processing, when a transmission request for the uncompressed packet is received from the receiving side, the uncompressed packet is transmitted to the receiving side.
10. In the data transmission method according to claim 1,
The data transmission method is characterized in that, in the transmission side processing, an uncompressed packet storing the same transmission information is continuously transmitted to the reception side a plurality of times.
11. In the data transmission method according to claim 10,
In the receiving side processing, when a restoration error of the compressed information stored in the compressed packet is detected, the transmitting side is notified that the restoration error has occurred.
The data transmission method is characterized in that the transmission side processing changes the number of times the uncompressed packet is continuously transmitted to the reception side based on the frequency of notification indicating the occurrence of a restoration error from the reception side.
12. In the data transmission method according to claim 1,
The data transmission side processing is a data transmission method, characterized in that after transmission of the uncompressed packet, an auxiliary transmission packet including a packet identifier and transmission information stored in the uncompressed packet is transmitted to the receiving side a predetermined number of times.
13. In the data transmission method according to claim 1,
In the sender processing, the uncompressed packet is given an error correction code and transmitted to the receiver.
In the receiving side processing, a data transmission method characterized in that an error correction processing is performed on the uncompressed packet by an error correction code assigned to the uncompressed packet.
14. In the data transmission method according to claim 2,
In the transmission side processing, an error correction code is added to the packet identifier and transmission information in the uncompressed packet.
The data transmission method is characterized in that, in the receiving side processing, error correction processing is performed on the packet identifier and transmission information included in the uncompressed packet by the error correction code given to them.
15. In the data transmission method according to claim 1,
In the receiving side processing, when a restoration error of the compressed information stored in the compressed packet is detected, the transmitting side is notified that the restoration error has occurred.
In the transmission side processing, a process of transmitting the uncompressed packet with an error correction code added to the uncompressed packet according to the frequency of notification indicating the occurrence of a restoration error from the receiving side, and an error of the uncompressed packet. A data transmission method characterized in that one of the processes of transmitting without adding a correction code is performed.
16. In the data transmission method according to claim 1,
In the transmission side processing, only the uncompressed packet is held in the retransmission buffer as retransmission data, and is stored.
In the receiving side processing, when a transmission error of the uncompressed packet is detected, the transmitting side is requested to retransmit the uncompressed packet which is an error packet.
In the transmission side processing, when the retransmission request for the error packet is received, the uncompressed packet corresponding to the error packet is received on the receiving side only when the uncompressed packet corresponding to the error packet is held in the retransmission buffer. A data transmission method characterized by resending to.
17. In the data transmission method according to claim 2,
In the transmission side processing, the packet identifier and transmission information stored in the uncompressed packet are held in the retransmission buffer as retransmission data.
In the receiving side processing, when a transmission error of the uncompressed packet is detected, the transmitting side is requested to retransmit the packet identifier and the transmission information stored in the uncompressed packet which is the error packet.
In the transmission side processing, when a request for retransmission of the packet identifier and transmission information is received, the packet identifier and transmission information in the uncompressed packet corresponding to the error packet are held in the retransmission buffer only. A data transmission method comprising retransmitting transmission information to a receiving side.
18. Information data transmission apparatus for sequentially transmitted to the receiving side for each transmission information corresponding to the packet,
A receiving means for receiving the above transmission information as an input signal, and
An uncompressed packet in which the predetermined transmission information is stored as uncompressed information in response to the received transmission information, and at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information. A packet creation method that creates a compressed packet that is being used,
Reference information management means that accumulates and manages information related to uncompressed packets created by the above packet creation means as reference information, and
It is provided with a transmission means for transmitting each packet created by the above packet creation means as a transmission signal to the receiving side.
The packet creating means bases the compressed information to be stored in the compressed packet to be created by the means on the transmission information corresponding to the compressed packet and the reference information stored in the reference information management means. A data transmission device characterized in that it is created.
19. receives information transmitted from the transmitting side in packets as a transmission signal, a data receiving apparatus which sequentially restoring transmission information corresponding to each packet,
An uncompressed packet that receives the transmission signal and stores the predetermined transmission information as uncompressed information, and at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information. A packet receiving means that outputs a compressed packet,
A packet restoration means that receives the output of the packet receiving means, performs restoration processing on each packet based on the information stored in each packet, and outputs transmission information corresponding to each packet.
Reference information management means that accumulates and manages information related to uncompressed packets that have been restored by the packet restoration means as reference information, and
It is provided with an output means for outputting transmission information corresponding to each of the above packets from the packet restoration means.
The packet restoring means restores the transmission information corresponding to the compressed packet based on the compressed information included in the compressed packet and the reference information stored in the reference information management means. Receiver.

[0029]
[Means for solving problems]
Data transmission method according to the present onset Ming, a data transmission method for transmitting to the receiving side sequentially from the transmission side for each transmission information corresponding to information to the packet, the non-predetermined transmission information is stored as uncompressed data Transmission side processing that transmits compressed packets and continuously transmits compressed packets in which at least a part of the transmission information following the above-mentioned predetermined transmission information is compressed and stored as compressed information, and each packet from the transmitting side is received. Then, the receiving side processing that restores the transmission information corresponding to each packet based on the uncompressed information and the compressed information stored in each packet is included, and the transmitting side processing is the compressed packet to be transmitted. The receiving side processing including the compression processing for creating the compressed information to be stored based on the transmission information corresponding to the reference packet which is the uncompressed packet and the transmission information corresponding to the target packet as the transmission target. However, it includes a restoration process for restoring the transmission information corresponding to the compressed packet to be restored based on the transmission information corresponding to the reference packet and the compressed information included in the compressed packet as the restoration target.

This onset Ming, in the data transmission method, in the transmission-side process, the as uncompressed packet, a packet identifier indicating the packet transmits a packet together with the uncompressed information, the compressed packet that follows the above uncompressed packet A packet including a reference packet identifier indicating an uncompressed packet as the reference packet is transmitted together with the compressed information, and in the compression process, the transmission information corresponding to the reference packet and the compressed packet are combined with the compressed information. It creates difference information with the corresponding transmission information.

This onset Ming, in the data transmission method, in the transmission-side process, the the compressed packet, and storing additional information for calculating based on the difference information to the transmission information corresponding to the reference packet, the receiving In the side processing, the difference information in the compressed packet is calculated from the transmission information corresponding to the reference packet based on the additional information in the compressed packet.

Those present onset bright, in the data transmission method, the additional information, the compressed packet is a recognizable sequence number whether the packet sent to the ordinal number after transmission of the uncompressed packet as the reference packet Is.

This onset Ming, in the data transmission method, the additional information is what the difference information in the compressed packet is a variable formula for calculating from the transmission information corresponding to the reference packet.

This onset Ming, in the data transmission method, in the transmission-side process, by using a plurality of uncompressed packets which have been created to be sent earlier than the compressed packet as the reference packet, to the compressed packet, each The difference information between the transmission information corresponding to the reference packet and the transmission information corresponding to the compressed packet is associated with the reference packet identifier corresponding to each reference packet, and the corresponding difference information and the reference packet identifier are compressed. A plurality of sets are stored as information, and in the receiving side processing, the transmission information corresponding to the compressed packet is restored by using the difference information and the packet identifier of any set in the compressed packet.

This onset Ming, in the data transmission method, in the transmission-side process is to transmit the uncompressed packet at regular intervals.

This onset Ming, in the data transmission method, in the transmission-side process, when the size of the compressed information contained in the compressed packet to be transmitted to the receiving side exceeds a predetermined value, and transmits the uncompressed packet ..

This onset Ming, in the data transmission method, in the receiving process, when the size of the compressed data included in the compressed packet from the transmitting side exceeds a predetermined value, requests the transmission of the uncompressed packet to the transmitting side In the transmission side processing, when a transmission request for the uncompressed packet is received from the receiving side, the uncompressed packet is transmitted to the receiving side.

This onset Ming, in the data transmission method, in the transmission-side process is for transmitting the uncompressed packet containing the same transmission information continuously to the receiver a plurality of times.

This onset Ming, in the data transmission method, in the receiving process, when detecting a recovery error of compressed information stored in the compressed packet, and notify that the restore error has occurred to the transmission side, the transmission In the side processing, the number of times the uncompressed packet is continuously transmitted to the receiving side is changed based on the frequency of notification indicating the occurrence of the restoration error from the receiving side.

This onset Ming, in the data transmission method transmission, in the transmission-side process, after transmission of the uncompressed packet, an auxiliary transmission packet including the packet identifier and the transmission data stored in the uncompressed packet, the predetermined number of times recipient Is what you do.

This onset Ming, in the data transmission method, in the transmission-side process, transmitting the uncompressed packet thereto by applying an error correction code to the receiver, in the receiving process for the uncompressed packet , The error correction processing is performed by the error correction code given to the error correction code.

This onset Ming, in the data transmission method, in the transmission-side process, in the uncompressed packet, an error correction code assigned to the packet identifier and the transmission information, in the receiving process, included in the uncompressed packet The packet identifier and the transmission information are subjected to error correction processing by the error correction code assigned to them.

This onset Ming, in the data transmission method, in the receiving process, when detecting a recovery error of compressed information stored in the compressed packet, and notify that the restore error has occurred to the transmission side, the transmission In the side processing, according to the frequency of notification indicating the occurrence of a restoration error from the receiving side, the uncompressed packet is given an error correction code and transmitted, and the uncompressed packet is given an error correction code. One of the processes of transmitting without giving is performed.

This onset Ming, in the data transmission method, in the transmission-side process, held in the retransmission buffer only the uncompressed packet as the retransmission data, in the receiving process, the transmission error of the uncompressed packet is detected At that time, the transmitting side is requested to retransmit the uncompressed packet which is an error packet, and in the transmitting side processing, when the retransmitting request of the error packet is received, the uncompressed packet corresponding to the error packet is used for retransmission. Only when it is held in the buffer, the uncompressed packet corresponding to the error packet is retransmitted to the receiving side.

This onset Ming, in the data transmission method, in the transmission-side process, held in the retransmission buffer of the packet identifier and the transmission information stored in the uncompressed packet as the retransmission data, in the receiving process, the When a transmission error of an uncompressed packet is detected, the transmitting side is requested to retransmit the packet identifier and transmission information stored in the uncompressed packet which is an error packet, and in the transmitting side processing, the packet identifier is described. And when a request to retransmit the transmission information is received, the packet identifier and the transmission information are retransmitted to the receiving side only when the packet identifier and the transmission information in the uncompressed packet corresponding to the above error packet are held in the retransmission buffer. It is a thing.

Data transmission method according to the present onset Ming, a data transmission method for transmitting to the receiving side sequentially from the transmission side for each transmission information corresponding to information to the packet, the non-predetermined transmission information is stored as uncompressed data Transmission side processing that transmits compressed packets and continuously transmits compressed packets in which at least a part of the transmission information following the above-mentioned predetermined transmission information is compressed and stored as compressed information, and each packet from the transmitting side is received. Then, based on the uncompressed information and the compressed information stored in each packet, the receiving side processing for restoring the transmission information corresponding to each packet is included, and in the transmitting side processing, the compression to be transmitted is included. The compressed information to be stored in the packet is created based on the transmission information corresponding to the reference packet which is the uncompressed packet and the transmission information corresponding to the compressed packet as the transmission target. The first data transmission process for restoring the transmission information corresponding to the compressed packet to be restored based on the transmission information corresponding to the reference packet and the compressed information included in the compressed packet to be restored, and transmission. On the side, the compressed information stored in the compressed packet is created by a method different from the method for creating the compressed information in the first data transmission process, and on the receiving side, the compressed information stored in the compressed packet is created. Including a second data transmission process of restoring by a method different from the method of restoring compressed information in the first data transmission process, when the transmission information is transmitted by a packet, the first and second data transmission processes are performed. The data transmission process of either the first or second data transmission process is performed by switching according to the occurrence status of the restoration process error for the compressed packet on the receiving side.

This onset Ming, in the data transmission method, the second data transmission process, the transmission-side process, before the compressed information stored in the compressed packet to be the transmission target, which is transmitted immediately before the compressed packet The compression process created based on the transmission information corresponding to the packet and the transmission information corresponding to the compressed packet as the transmission target is included, and the compression information included in the compression packet to be restored is used as the receiving side processing. It includes a restoration process that restores using the transmission information corresponding to the previous packet.

This onset Ming, in the data transmission method, when an error of the restoration process of restoring the compressed data included in the compressed packet at the receiving side occurs, the error occurrence is notified from the receiving side to the transmitting side, the transmitting side , When the notification frequency of error occurrence exceeds a certain value, the receiving side is notified of the processing change so as to change the restoration processing on the receiving side to the restoration processing in the first data transmission processing, and then the transmitting side performs the above-mentioned first. The compression process in the data transmission process of 1 is performed, while on the transmitting side, when the notification frequency of error occurrence falls below a certain value, the restoration process on the receiving side is changed to the restoration process in the second data transmission device. The processing change notification is sent to the receiving side, and then the transmitting side performs the compression processing in the second data transmission processing.

This onset Ming, in the data transmission method, the receiving side, when an error occurrence frequency error of the restoration process of restoring the compressed data included in the compressed packet is generated exceeds a predetermined value, the compression process at the transmitting side A processing change request is made to the transmitting side to change to the compression processing in the first data transmission processing, while the receiving side performs the compression processing on the transmitting side when the error occurrence frequency of the restoration processing becomes less than a predetermined value. A process change request is made to the transmitting side to change to the compression processing in the second data transmission process, and the transmitting side requests a processing change from the receiving side among the compression processes in the first and second data transmission processes. The compression process in the data transmission process according to the above is performed.

Data transmission method according to the present onset Ming, a data transmission method for transmitting to the receiving side sequentially from the transmission side for each transmission information corresponding to information to the packet, the non-predetermined transmission information is stored as uncompressed data Transmission side processing that transmits compressed packets and continuously transmits compressed packets in which at least a part of the transmission information following the above-mentioned predetermined transmission information is compressed and stored as compressed information, and each packet from the transmitting side is received. Then, the transmitting side processing includes the receiving side processing for restoring the transmission information corresponding to each packet based on the uncompressed information and the compressed information stored in each packet, and the transmitting side processing is the compression to be transmitted. A compression process that creates compressed information to be stored in a packet based on update information related to a packet transmitted prior to the compressed packet and transmission information corresponding to the compressed packet as the transmission target, and the above. A sender update process that sets information related to the uncompressed packet as an initial value of update information, and then updates the update information to information related to the specific compressed packet each time a specific compressed packet is created. The restoration process in which the receiving side processing restores the transmission information corresponding to the compressed packet to be restored by using the update information related to the packet received before the compressed packet, and the update information. The information related to the uncompressed packet is set as the initial value of, and then every time the transmission information corresponding to the specific compressed packet is restored, the update information is updated to the information related to the specific compressed packet. It includes the receiving side update process.

This onset Ming, in the data transmission method, the update information, the reference packet identifier indicating the uncompressed packet or a specific compressed packet as the reference packet, which is composed of the transmission information corresponding to the reference packet, The compressed packet includes a reference packet identifier indicating the uncompressed packet or the specific compressed packet as a reference packet, and an information update flag indicating whether or not the update information should be updated, and the information update in the specific compressed packet. The flag is set to a value indicating that the update information should be updated, and the information update flag in the compressed packet other than the specific compressed packet is set to a value indicating that the update information should not be updated. Is what you are doing.

This onset Ming, in the data transmission method, in the transmission-side process is intended to be transmitted to the receiving side the specific compressed packet every time a predetermined time elapses.

This onset Ming, in the data transmission method, in the transmission-side process, each time for transmitting a compressed packet certain number, is for sending to the receiving side the specific compressed packet.

This onset Ming, in the data transmission method, in the transmission-side process, when requested to transmit the specific compressed packet from the receiving side, is to sent to the receiving side the specific compressed packet.

This onset Ming, in the data transmission method, in the transmission-side process, when the size of the compressed information contained in the compressed packet to be transmitted to the receiving side exceeds a certain value, one that transmits the specific compressed packet is there.

This onset Ming, in the data transmission method, in the transmission-side process, when the average value of the size of the compressed data included in the compressed packet to be transmitted to the receiving side exceeds a predetermined value, transmits the specific compressed packet Is what you do.

This onset Ming, in the data transmission method, the transmission information includes itemized transmission information corresponding to a plurality of items, said compression information includes itemized compressed information corresponding to a plurality of items, the compressed packet The itemized compression information corresponding to each item in the compressed information included in is the transmission of the itemized compressed information corresponding to each item in the transmission information corresponding to the compressed packet, and the transmission corresponding to the uncompressed packet or the specific compressed packet. It is information obtained by compressing using the item-specific transmission information corresponding to each item in the information, and the above-mentioned item-specific compression information includes an item type flag that specifies the item corresponding to each item.

This onset Ming, in the data transmission method, the itemized compression information is intended to include data length information indicating the data length.

This onset Ming, in the data transmission method, each itemized compression information, have been prepared by using a compression method corresponding to each of the plurality of compression methods, the compressed information by each item, It includes restoration method specific information indicating a restoration method corresponding to the compression method for restoring the itemized compression information.

Data transmission device according to the present onset Ming is an information data transmission apparatus for sequentially transmitted to the receiving side for each transmission information corresponding to the packet, and receiving means for receiving the transmission information as an input signal, which is the received An uncompressed packet that receives transmission information and stores the predetermined transmission information as uncompressed information, and a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information. A packet creation means for creating a packet, a reference information management means for accumulating and managing information related to an uncompressed packet created by the packet creation means as reference information, and each packet created by the packet creation means. The packet creating means is provided with a transmission means for transmitting the above as a transmission signal to the receiving side, and the compressed information to be stored in the compressed packet to be created by the means is provided with the transmission information corresponding to the compressed packet. The configuration is created based on the reference information stored in the reference information management means.

This onset Ming receives the information transmitted in packet units from the transmitting side as a transmission signal, a data receiving apparatus which sequentially restoring transmission information corresponding to each packet, receives the transmission signal, a predetermined transmission An uncompressed packet in which information is stored as uncompressed information, a packet receiving means for outputting a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information, and a packet receiving means. A packet restoration means that receives the output of the packet receiving means, performs restoration processing on each packet based on the information stored in each packet, and outputs transmission information corresponding to each packet, and the above. Reference information management means that accumulates and manages information related to uncompressed packets that have been restored by packet restoration means as reference information, and output that outputs transmission information corresponding to each packet from the packet restoration means. The packet restoration means is provided with means, and the transmission information corresponding to the compressed packet is restored based on the compressed information included in the compressed packet and the reference information stored in the reference information management means. It is the one.

Data transmission device according to the present onset Ming is an information data transmission apparatus for sequentially transmitted to the receiving side for each transmission information corresponding to the packet, and receiving means for receiving the transmission information as an input signal, which is the received An uncompressed packet that receives transmission information and stores the predetermined transmission information as uncompressed information, and a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information. A packet creation means for creating a packet, an information management means for managing uncompressed packets created by the packet creation means and information related to a specific compressed packet as update information, and a packet created by the packet creation means. Is provided as a transmission means for transmitting to the receiving side as a transmission signal, the information management means sets information related to the uncompressed packet as an initial value of the update information, and then a specific compressed packet is created. Each time, the update information is configured to be updated with information related to the specific compressed packet, and the packet creating means compresses the compressed information to be stored in the compressed packet to be created by the means. It is configured to be created based on the transmission information corresponding to the packet and the update information stored in the reference information management means.

This onset Ming receives the information transmitted in packet units from the transmitting side as a transmission signal, a data receiving apparatus which sequentially restoring transmission information corresponding to each packet, receives the transmission signal, a predetermined transmission An uncompressed packet in which information is stored as uncompressed information, a packet receiving means for outputting a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information, and a packet receiving means. A packet restoration means that receives the output of the packet receiving means, performs restoration processing on each packet based on the information stored in each packet, and outputs transmission information corresponding to each packet, and the above. Corresponds to the reference information management means that accumulates and manages uncompressed packets that have been restored by the packet restoration means and information related to specific compressed packets as reference information, and each packet that has been restored by the packet restoration means. Each time an output means for outputting transmission information is provided, the information management means sets information related to the uncompressed packet as an initial value of the update information, and then a restoration process for the specific compressed packet is performed. In addition, the update information is configured to be updated with information related to the specific compressed packet, the packet restoration means is used, the transmission information corresponding to the compressed packet is referred to the compressed information included in the compressed packet, and the above reference. It is configured to be restored based on the reference information stored in the information management means.

[0237]
【Effect of the invention】
According to the data transmitting method of the present onset light as described above, when transmitting information in packet units, the transmission side, compresses including transmission information compressed following the uncompressed packet including transmission information uncompressed Packets are continuously transmitted, and at this time, the compressed information to be stored in the compressed packet to be transmitted is the transmission information corresponding to the reference packet which is the uncompressed packet and the transmission corresponding to the target packet as the transmission target. It is created based on the information, and on the receiving side, the transmission information corresponding to the compressed packet is restored based on the compressed information included in the compressed packet and the transmission information corresponding to the reference packet. Even if a transmission error of the compressed packet occurs, the receiving side can restore the succeeding compressed packet based on the transmission information corresponding to the uncompressed packet as the reference packet. As a result, the number of packets discarded on the receiving side due to the occurrence of an error in the wireless section can be reduced, and thereby the quality of the transmission data in the transmission line including the wireless section can be improved.

According to the onset bright, transmitted in the data transmission method, the transmission side, as each compressed packet following the uncompressed packet, a packet including the reference packet identifier indicating the uncompressed packet as the reference packet with the compression information Therefore, on the receiving side, the reference packet required for the restoration process for the compressed packet can be specified by the reference packet identifier.
Further, as the compressed information, the difference information between the transmission information corresponding to the reference packet and the transmission information corresponding to the compressed packet is created, so that the compressed information included in the compressed packet is created by a simple arithmetic process. Can be done.

According to the onset bright, in the data transmission method, the transmitting side side, above compressed packet stores the additional information for calculating based on the difference information to the transmission information corresponding to the reference packet, received On the side, since the difference information in the compressed packet is calculated from the transmission information corresponding to the reference packet based on the additional information, the amount of information in the difference information can be reduced and the data compression efficiency can be improved. As a result, the data transmission efficiency can be improved.

According to the onset bright, in the data transmission method, as the additional information, the compressed packet, the identifiable sequence number whether the packet sent to the ordinal number after transmission of the uncompressed packet as the reference packet Since it is used, the difference information can be set to 0 bits for the transmission information that increases by a certain amount each time the packet is transmitted.

According to the onset bright, in the data transmission method, as the additional information, the difference information in the compressed packet so using equation variables for calculating from the transmission information corresponding to the reference packet, every time the transmission of the packet For transmission information that fluctuates according to a certain function, the difference information can be greatly reduced.

According to the onset bright, in the data transmission method, the transmitting side uses a plurality of uncompressed packets which have been created to be sent earlier than the compressed packet as the reference packet, to the compressed packet, each The difference information between the transmission information corresponding to the reference packet and the transmission information corresponding to the compressed packet is associated with the reference packet identifier corresponding to each reference packet, and the corresponding difference information and the reference packet identifier are compressed. A plurality of sets are stored as information, and in the receiving side processing, the transmission information corresponding to the compressed packet is restored by using the difference information and the packet identifier of any set in the compressed packet, so that it is necessary for the restoration of the compressed packet. It is possible to improve the reliability of the transmission process for uncompressed packets containing various information, and thereby greatly improve the quality of wirelessly transmitted data.

According to the onset bright, in the data transmission method, in the transmission-side process, and transmits the uncompressed packet at a constant period, by suppressing the data size of the compressed packet is extremely large, the compression of transmitted information The efficiency can be kept within a nearly constant fluctuation range. As a result, not only the quality of wirelessly transmitted data but also the data transmission efficiency can be improved.

According to the onset bright, in the data transmission method, the transmission side, when the size of the compressed information contained in the compressed packet to be transmitted to the receiving side exceeds a predetermined value, and transmits the uncompressed packet, the compression It is possible to keep the data size of the packet small and improve the compression efficiency of the transmitted information, and it is possible to improve not only the quality of the wireless transmission data but also the data transmission efficiency.

According to the onset bright, in the data transmission method, the receiving side, when the size of the compressed information contained in the compressed packet from the transmitting side exceeds a predetermined value, requests the transmission of the uncompressed packet to the transmitting side Since the transmitting side transmits the uncompressed packet from the receiving side to the receiving side in response to the transmission request of the uncompressed packet, it is possible to keep the data size of the compressed packet small and improve the compression efficiency of the transmission information. Not only the quality of wireless transmission data but also the data transmission efficiency can be improved.

According to the onset bright, in the data transmission method, the transmitting side, and transmits the uncompressed packet containing the same transmission information to a plurality of times consecutively receiving side, the uncompressed packet required for restoration of the compressed packet It is possible to increase the reliability of the transmission process for the packet, thereby greatly improving the quality of the wirelessly transmitted data.

According to the onset bright, in the data transmission method, the receiving side, when detecting a recovery error of compressed information stored in the compressed packet, and notify that the restore error has occurred to the transmission side, the transmission side Then, since the number of times the uncompressed packet is continuously sent to the receiving side is changed based on the frequency of the notification indicating the occurrence of the restoration error from the receiving side, the continuous transmission of the uncompressed packet can be performed efficiently. it can.

According to the onset bright, transmitted in the data transmission method, the transmission side, after transmission of the uncompressed packet, an auxiliary transmission packet including the packet identifier and the transmission data stored in the uncompressed packet, the predetermined number of times recipient Therefore, the reliability of the transmission process for the information required for restoring the compressed packet can be improved, and the quality of the wirelessly transmitted data can be greatly improved.

According to the onset bright, in the data transmission method, the transmitting side transmits the uncompressed packet thereto by applying an error correction code to the receiver, in the receiving process for the uncompressed packet Since the error correction processing is performed by the error correction code attached to the error correction code, the reliability of the transmission processing for the uncompressed packet including the information necessary for the restoration of the compressed packet can be greatly improved, and the wireless transmission is performed thereby. The quality of data can be greatly improved.

According to the onset bright, in the data transmission method, the transmission side, in the uncompressed packet, an error correction code assigned to the packet identifier and the transmission information, the receiving side, included in the uncompressed packet Packet Since the error correction processing is performed on the identifier and the transmission information by the error correction code assigned to them, the reliability of the transmission processing for the information necessary for the restoration of the compressed packet can be greatly improved, thereby wirelessly. The quality of transmitted data can be greatly improved.

According to the onset bright, in the data transmission method, the receiving side, when detecting a recovery error of compressed information stored in the compressed packet, and notify that the restore error has occurred to the transmission side, the transmission side Then, according to the frequency of notification indicating the occurrence of a restoration error from the receiving side, the process of transmitting the uncompressed packet by adding an error correction code to the uncompressed packet and the process of transmitting the uncompressed packet by adding an error correction code to the packet. Since one of the processes of transmitting without performing is performed, the process of assigning an error correction code to the uncompressed packet and the error correction process of the uncompressed packet can be effectively performed.

According to the onset bright, in the data transmission method, the transmitting side maintains the retransmission buffer only the uncompressed packet as a retransmission data in response to a retransmission request for the error packet from the receiving side, the error packet Only when the uncompressed packet corresponding to is held in the retransmission buffer, the uncompressed packet corresponding to the error packet is retransmitted to the receiving side, so that the reliability of the transmission process for the information necessary for restoring the compressed packet can be improved. In addition to being greatly improved, uncompressed packets can be efficiently retransmitted, whereby the quality of wirelessly transmitted data and the data transmission efficiency can be greatly improved.

According to the onset bright, in the data transmission method, the transmitting side maintains the retransmission buffer packet identifier and the transmission information stored in the uncompressed packet as the retransmission data, from the receiving side, error packet Only when the packet identifier and transmission information in the uncompressed packet corresponding to the error packet are held in the retransmission buffer in response to the request for retransmission of the packet identifier and transmission information stored in the packet identifier and transmission information. Is retransmitted to the receiving side, so that the reliability of the transmission process for the information required for restoring the compressed packet can be greatly improved, the uncompressed packet can be retransmitted efficiently, and the data recording capacity in the retransmission buffer can be increased. Can be reduced.

According to the data transmitting method of the present onset bright, on the transmission side, subsequent to the uncompressed packet including transmission information uncompressed, compressed packets containing compressed transmission information and continuous transmission, this time, a transmission target The compressed information to be stored in the compressed packet is created based on the transmission information corresponding to the reference packet which is the uncompressed packet and the transmission information corresponding to the target packet as the transmission target. The first data transmission process for restoring the transmission information corresponding to the compressed packet based on the compressed information included in the compressed packet and the transmission information corresponding to the reference packet, and the transmission side is stored in the compressed packet. The compressed information is created by a method different from the method for creating the compressed information in the first data transmission process, and the receiving side uses the compressed information stored in the compressed packet as the compressed information in the first data transmission process. The first and second data transmission processes are switched according to the occurrence status of the restoration process error for the compressed packet on the receiving side, including the second data transmission process for restoring by a method different from the restoration method of. When the error occurrence frequency is high, the quality of the wireless transmission data can be improved, and when the error occurrence frequency is low, the compression efficiency of the transmission information can be improved.

According to the onset bright, in the data transmission method, as the second data transmission process, the transmission side, the compressed information stored in the compressed packet to be the transmission target, which is transmitted immediately before the compressed packet It is created based on the transmission information corresponding to the previous packet and the transmission information corresponding to the compressed packet as the transmission target, and on the receiving side, the compressed information included in the compressed packet to be restored corresponds to the previous packet. Since the data transmission process for restoring is performed using the transmission information to be performed, the compression efficiency of the transmission information can be greatly improved when the error occurrence frequency is low.

According to the onset bright, in the data transmission method, at the transmission side, when the notification frequency of error occurrence from the receiver exceeds a predetermined value, performs the first data transmission processing, the error When the notification frequency falls below a certain value, the compression process in the second data transmission process is performed. Therefore, when the error occurrence frequency is high, the wireless transmission data quality is high, and when the error occurrence frequency is low. It is possible to adaptively switch to a transmission method with high compression efficiency of the transmission information of.

According to the onset bright, in the data transmission method, the receiving side, when the frequency of occurrence of the restoration process error for the compressed packet exceeds a predetermined value, performs the first data transmission process, the restoration process When the error occurrence frequency falls below a predetermined value, the second data transmission process is performed. Therefore, a transmission method with high quality of wireless transmission data when the error occurrence frequency is high and transmission information when the error occurrence frequency is low. It is possible to adaptively switch between a transmission method with high compression efficiency.

According to the data transmitting method of the present onset bright, when transmitting information in packet units, the transmission side, the transmitted compression information to be stored in the compressed packet to be transmitted, prior to the compressed packet Packet Created based on the update information related to the above and the transmission information corresponding to the compressed packet as the transmission target, at this time, the information related to the uncompressed packet is set as the initial value of the update information, and then the information related to the uncompressed packet is set. Each time a specific compressed packet is created, the above-mentioned update information is updated to information related to the specific compressed packet, and the receiving side transmits the transmission information corresponding to the compressed packet to be restored before the compressed packet. Restoration is performed using the update information related to the received packet, and at this time, the information related to the uncompressed packet is set as the initial value of the update information, and then the transmission information corresponding to the specific compressed packet is set. Since the above-mentioned update information is updated to the information related to the specific compressed packet each time the restoration is performed, the quality of the transmission data in the radio section is improved, the effective speed of data transmission is improved, and the data compression efficiency is improved. As a result, the time and cost required for unrestorable packet transmission can be significantly reduced. Further, since the reference information required for the restoration process is updated in the compressed packet by transmitting the specific compressed packet, it is possible to improve the compression efficiency of the transmitted information while maintaining the high data transmission efficiency.

According to the onset bright, in the data transmission method, above compressed packet contains information indicating a reference packet identifier indicating the uncompressed packet or a specific compressed packet as the reference packet, whether or not to update the update information Since the update flag is stored, the receiving side can easily determine whether or not the update information should be updated by the information update flag.

According to the onset bright, in the data transmission method, in the transmission-side process, since sending the specific compressed packet every time a predetermined time elapses in the reception side, an increase of the difference amount of information in the compressed packet is prevented Therefore, the quality of the transmitted data in the wireless section can be improved to improve the effective speed of data transmission, and the data compression efficiency can be further improved.

According to the onset bright, in the data transmission method, in the transmission-side process, each time for transmitting a compressed packet a certain number, therefore sends to the receiver the specific compressed packet, difference information amount in the compressed packet The increase can be suppressed, the quality of the transmitted data in the radio section can be improved, the effective speed of data transmission can be improved, and the data compression efficiency can be further improved.

According to the onset bright, in the data transmission method, in the transmission-side process, when requested to transmit the specific compressed packet from the receiving side, since the sending to the receiving side the specific compressed packet, the radio section It is possible to improve the quality of the transmitted data and the effective speed of the data transmission in the above, and further improve the data compression efficiency.

According to the onset bright, in the data transmission method, in the transmission-side process, when the size of the compressed information contained in the compressed packet to be transmitted to the receiving side exceeds a predetermined value, transmits the specific compressed packet Therefore, it is possible to suppress an increase in the amount of difference information in the compressed packet.

According to the onset bright, in the data transmission method, in the transmission-side process, when the average value of the size of the compressed data included in the compressed packet to be transmitted to the receiving side exceeds a predetermined value, the specific compressed packet Is transmitted, it is possible to suppress an increase in the amount of difference information in the compressed packet and to stably control fluctuations in the difference information. In this case as well, it goes without saying that the time and cost required for unrestorable packet transmission can be further significantly reduced.

According to the onset bright, include in the data transmission method, the transmission information includes itemized transmission information corresponding to a plurality of items, said compression information, itemized compressed information corresponding to a plurality of items, the The itemized compression information corresponding to each item in the compressed information included in the compressed packet corresponds to the itemized compressed information corresponding to each item in the transmission information corresponding to the compressed packet, and corresponds to the uncompressed packet or the specific compressed packet. It is information obtained by compressing using the item-specific transmission information corresponding to each item in the transmission information to be performed, and since the compression information for each item includes an item type flag that specifies the item corresponding to each item, the transmission information. It is possible to perform the compression process for each item, realize the optimum compression effect for each item, and reduce the storage area including the RAM for storing the update information and the like. As a result, not only the time and cost required for unrestorable packet transmission can be reduced, but also the cost required for manufacturing the transmitting terminal device and the receiving terminal device can be reduced.

According to the onset bright, in the data transmission method, the itemized compression information, because it contains data length information indicating the data length, it is possible to efficiently perform restoration processing for itemized compression information.

According to the onset bright, in the data transmission method, each itemized compression information, for restoring said item-specific compression information, because it includes a restoration method specifying information indicating a restoration method corresponding to the compression method, It is possible to efficiently perform the restoration process for a plurality of itemized compressed information to which various compression processes have been performed.

According to the data transmission apparatus according to this onset Ming receives transmission information received, the uncompressed packet predetermined transmission information is stored as uncompressed data, and transmission information subsequent to the predetermined transmission information of at least the Reference information that accumulates and manages information related to uncompressed packets created by the packet creation means and the packet creation means that creates compressed packets that are partially compressed and stored as compressed information. The packet creating means is provided with a management means, and the compressed information to be stored in the compressed packet to be created by the means is stored in the transmission information corresponding to the compressed packet and the reference information management means. Since it is created based on the reference information provided, even if a compression packet transmission error occurs in the wireless section, the receiving side can handle the subsequent compressed packet with the uncompressed packet as the reference packet. It can be restored based on the transmission information. As a result, the number of packets discarded on the receiving side due to the occurrence of an error in the wireless section can be reduced, and the quality of the transmission data in the transmission line including the wireless section can be improved.

According to the data receiving apparatus according to the present onset bright, receives the information transmitted in packet units from the transmitting side as a transmission signal, the data receiving apparatus to the transmitting information successively restored corresponding to each packet, it receives the transmission signal Then, an uncompressed packet in which the predetermined transmission information is stored as uncompressed information and a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information are output. Information related to the packet receiving means, the packet restoring means that performs restoration processing on each packet based on the information stored in each packet, and the uncompressed packet that has been restored processing by the packet restoration means. The packet recovery means is provided with reference information management means for accumulating and managing the packet as reference information, and the transmission information corresponding to the compressed packet is stored in the compressed information included in the compressed packet and the reference information management means. Since the configuration is such that restoration is performed based on the reference information provided, even if a transmission error of the compressed packet occurs in the wireless section, the subsequent compressed packet is the transmission information corresponding to the uncompressed packet as the reference packet. It can be restored based on, which can improve the quality of transmitted data in the transmission line including the radio section.

According to the data transmission apparatus according to this onset Ming receives transmission information received, the uncompressed packet predetermined transmission information is stored as uncompressed data, and transmission information subsequent to the predetermined transmission information of at least the A packet creation means for creating a compressed packet that is partially compressed and stored as compressed information, and information related to an uncompressed packet and a specific compressed packet created by the packet creation means are managed as update information. An information management means is provided, and the information management means sets information related to the uncompressed packet as an initial value of the update information, and then each time a specific compressed packet is created, the update information is set. It is configured to update to information related to a specific compressed packet, and the packet creating means is used to display the compressed information to be stored in the compressed packet to be created by the means, the transmission information corresponding to the compressed packet, and the transmission information corresponding to the compressed packet. Since it is configured to be created based on the update information accumulated in the above reference information management means, the quality of the transmitted data in the wireless section is improved to improve the effective speed of data transmission, and the data compression efficiency is also improved. It can be increased, and as a result, the time and cost of unrecoverable packet transmission can be significantly reduced. Furthermore, since the reference information required for restoration processing is updated in the compressed packet by transmitting a specific compressed packet, the number of transmissions of the uncompressed packet is suppressed to a small number, and the transmission information is compressed while maintaining high data transmission efficiency. Efficiency can be increased.

According to the data receiving apparatus according to the present onset bright, receives the information transmitted in packet units from the transmitting side as a transmission signal, the data receiving apparatus to the transmitting information successively restored corresponding to each packet, it receives the transmission signal Then, an uncompressed packet in which the predetermined transmission information is stored as uncompressed information and a compressed packet in which at least a part of the transmission information following the predetermined transmission information is compressed and stored as compressed information are output. A packet receiving means, a packet restoring means that performs restoration processing on each packet based on the information stored in each of the packets, an uncompressed packet that has been restored by the packet restoring means, and a specific compression. A reference information management means for accumulating and managing information related to packets as reference information is provided, and the information management means sets information related to the uncompressed packet as an initial value of the update information, and then the above Each time a restoration process for a specific compressed packet is performed, the update information is configured to be updated with information related to the specific compressed packet, and the packet restoration means is used to obtain transmission information corresponding to the compressed packet. Since it is configured to restore based on the compressed information contained in the compressed packet and the reference information stored in the reference information management means, the quality of the transmission data in the wireless section is improved and the effective speed of data transmission is improved. At the same time, the data compression efficiency can be improved, and as a result, the time and cost required for unrestorable packet transmission can be significantly reduced. Further, every time a specific compressed packet is restored, the reference information required for the restoration process is updated in the compressed packet, so that the number of transmissions of the uncompressed packet is suppressed, and the data transmission efficiency and the compression efficiency of the transmission information are improved. High transmission processing can be realized.