CN103414692A - High real-time spacecraft data transmission method based on priorities - Google Patents
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Abstract
The invention discloses a high real-time spacecraft data transmission method based on priorities. The method comprises the first step of partitioning data assigned to be sent into a plurality of data packages and continuously allocating serial numbers to the data packages according to the successive sequence of data organization, the second step of setting the priorities for all data packages and sending the data packages according to the sequence from a high priority to a low priority of the data packages, the third step of verifying the integrity and correctness of one data package after a receiver receives the data package, and sending a confirmed data package comprising the serial number of a next data package needing to be received to a sender, the fourth step of sending the next data package after the sender receives the confirmed data package, if the confirmed data package is not received by the sender in the assigned time, the confirmed data package is sent again, and the fifth step of combining all received data packages into integrated data via the receiver according to the successive sequence of the serial numbers after all data packages are sent to the receiver. The high real-time spacecraft data transmission method has the advantages of being high in real-time performance and reliability.
Description
Technical field
The present invention relates to a kind of spacecraft data transmission method, belong to the spacecraft field of data transmission.
Background technology
Along with the spacecraft function becomes increasingly complex, between spacecraft inside or spacecraft, the trend that data communication and collaborative work become the spacecraft development is carried out in networking.The spacecraft network data transmission adopts ICP/IP protocol more at present, and real-time is poor, reliability is low and design complicated defect and ICP/IP protocol exists.
The data that spacecraft carries out data communication and collaborative work transmission mainly are divided into control data and Transaction Information.Control data high to the requirement of real-time of transfer of data, and data volume is generally less; Transaction Information is low to the requirement of real-time of transfer of data, and requires high to data transmission bauds, throughput.General ICP/IP protocol is not distinguished and is treated at protocol layer the type of data packet of transmission, the transmission of can't requirement of real time high control data.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiencies in the prior art, a kind of real-time spacecraft data transmission method of height of Priority-based is provided, solved the problem that ICP/IP protocol is poor for spacecraft data communication real-time, reliability is low of using.
The present invention includes following technical scheme:
The real-time spacecraft data transmission method of a kind of height of Priority-based, step is as follows:
(1) will specify the Data Segmentation that will send to become several packets, by the sequencing continuous dispensing sequence number of packet according to Organization of Data;
(2) each packet is arranged to its priority, send packet according to packet priority order from high to low;
(3) after the recipient receives a packet, the integrality of this packet of verification and correctness, send one to transmit leg afterwards and confirm packet, and this confirmation packet comprises that the next one wants to receive the sequence number of packet;
(4) transmit leg is received and is confirmed to send next packet after packet, if do not receive at the appointed time and confirm that packet resends this packet;
(5) until all packets all send to the recipient, the recipient will receive packet, according to the sequencing of sequence number, packet combining be become to complete data.
The data packet format in described step (1), Data Segmentation become is specially: described data packet format comprise destination address, local address, destination interface, local port, sequence number, confirmation number, type of data packet, priority, data field and verification and;
Local address and local port mean address and the port of transmit leg, respectively take a byte, destination address and destination interface mean recipient's address and port, respectively take a byte, sequence number is the sequence number that transmit leg sends packet, takies two bytes, and confirmation number is answered for the confirmation to a up-to-date packet of receiving, its value equals the sequence number of this packet, takies two bytes; Type of data packet takies four bits, and priority is to mean with 4 bits this packet transmits in network priority; Verification and for the checking data bag, data field is deposited the data that will transmit.
The real-time spacecraft transfer of data of the height of described Priority-based occurs in transport network layer.
Described type of data packet comprises ACK, SYN, FIN and RST;
ACK equals at 1 o'clock, shows that this packet is to confirm packet; SYN equals at 1 o'clock, and this packet is the packet that request connects; FIN equals at 1 o'clock, and this packet is the packet of release connection; RST equals at 1 o'clock, and this packet is the packet that refusal connects.
The present invention compared with prior art has following advantage:
The present invention is by transport layer setting packet different priority, and the packet that priority is high can be transmitted by the very first time, so that real time data is transferred to destination node in time.In transmission of data packets, adopt packet verification and the mechanism such as data packet acknowledgement, overtime re-transmission, guaranteed the reliability of data packet transmission.It is high that the spacecraft data transfer mode of the Priority-based that the present invention proposes has real-time, the characteristics that reliability is high.
The accompanying drawing explanation
Fig. 1 is the form of transport layer data bag of the present invention.
Fig. 2 is the inventive method flow chart.
Embodiment
Below just by reference to the accompanying drawings the present invention is described further.
As shown in Figure 2, the invention provides a kind of real-time spacecraft data transmission method of height of Priority-based, occur in transport network layer, transport network layer refers to the transport layer in OSI network seven layer model.The data pack transmission method that adopts Priority-based to seize, arrange the priority of packet in transmitting procedure, the transmission that the packet that priority is high is low prior to priority improves the real-time of transfer of data; And adopt multi-stage data verification and overtime retransmission mechanism etc. to improve the reliability of transfer of data.Its step is as follows:
(1) will specify the Data Segmentation that will send to become several packets, by the sequencing continuous dispensing sequence number of packet according to Organization of Data;
Be specially: as shown in Figure 1, described data packet format comprise destination address, local address, destination interface, local port, sequence number, confirmation number, type of data packet, priority, data field and verification and;
Local address and local port mean address and the port of transmit leg, respectively take a byte, destination address and destination interface mean recipient's address and port, respectively take a byte, sequence number is the sequence number that transmit leg sends packet, takies two bytes, and confirmation number is answered for the confirmation to a up-to-date packet of receiving, its value equals the sequence number of this packet, takies two bytes; Type of data packet takies four bits, and priority is to mean with 4 bits this packet transmits in network priority; Verification and for the checking data bag, data field is deposited the data that will transmit;
Type of data packet comprises ACK, SYN, FIN and RST;
ACK equals at 1 o'clock, shows that this packet is to confirm packet; SYN equals at 1 o'clock, and this packet is the packet that request connects; FIN equals at 1 o'clock, and this packet is the packet of release connection; RST equals at 1 o'clock, and this packet is the packet that refusal connects;
(2) each packet is arranged to its priority, send packet according to packet priority order from high to low;
Be specially: each packet arranges priority, packet is in waiting for process of transmitting, according to priority order from high to low, form the Packet Generation chained list, the packet that priority is high preferentially is sent out, when having new data packets to send, this packet is inserted into to the corresponding position of packet chained list according to priority; When the situation of the transfer of data that has the high real-time requirement in network, the priority that the packet setting is higher, method provided by the present invention can guarantee that the packet that priority is high is preferentially sent, to guarantee real-time; In general ICP/IP protocol, the packet of transport layer sends according to the sequencing that request sends, and when the data that requirement of real-time is high send, can only wait all complete could transmissions afterwards of Packet Generation that send prior to its request, therefore, be difficult to guarantee the real-time of transfer of data.And adopt the method for the present invention can head it off, improve the real-time of transfer of data.
(3) after the recipient receives a packet, the integrality of this packet of verification and correctness, send one to transmit leg afterwards and confirm packet, and this confirmation packet comprises that the next one wants to receive the sequence number of packet;
Be specially: the check information of this packet is being deposited in the verification in packet and territory, after the recipient receives packet, the verification of calculated data bag and and with packet in verification and compare, with integrality and the correctness of verification msg bag; After recipient's verification msg bag, to one of transmit leg loopback, confirm that packet is received for a upper packet of informing the transmit leg transmission, can send next packet; By the confirmation of packet verification and each packet, wrap to guarantee the reliability of transfer of data.
(4) transmit leg is received and is confirmed to send next packet after packet, if do not receive at the appointed time and confirm that packet resends this packet;
Be specially: after a packet n sends, transmit leg will arrange a timer, if in the time of appointment, can't receive the confirmation packet of the packet n that the recipient returns, transmit leg will resend packet n, after through several times, repeating, still can't receive the confirmation packet, transmit leg just assert that the recipient lost efficacy, will no longer carry out transfer of data.
(5) until all packets all send to the recipient, the recipient will receive packet, according to the sequencing of sequence number, packet combining be become to complete data.
Be specially: transmit leg becomes a plurality of packets according to agreement by Data Segmentation while sending data, and be sequence number of each allocation of packets, this sequence number has identified the organizational form of data, and the recipient can, according to the sequence number of receiving packet, become initial data by packet combining.
Claims (4)
1. the real-time spacecraft data transmission method of the height of a Priority-based is characterized in that step is as follows:
(1) will specify the Data Segmentation that will send to become several packets, by the sequencing continuous dispensing sequence number of packet according to Organization of Data;
(2) each packet is arranged to its priority, send packet according to packet priority order from high to low;
(3) after the recipient receives a packet, the integrality of this packet of verification and correctness, send one to transmit leg afterwards and confirm packet, and this confirmation packet comprises that the next one wants to receive the sequence number of packet;
(4) transmit leg is received and is confirmed to send next packet after packet, if do not receive at the appointed time and confirm that packet resends this packet;
(5) until all packets all send to the recipient, the recipient will receive packet, according to the sequencing of sequence number, packet combining be become to complete data.
2. the real-time spacecraft data transmission method of the height of a kind of Priority-based according to claim 1 is characterized in that: the data packet format in described step (1), Data Segmentation become is specially: described data packet format comprise destination address, local address, destination interface, local port, sequence number, confirmation number, type of data packet, priority, data field and verification and;
Local address and local port mean address and the port of transmit leg, respectively take a byte, destination address and destination interface mean recipient's address and port, respectively take a byte, sequence number is the sequence number that transmit leg sends packet, takies two bytes, and confirmation number is answered for the confirmation to a up-to-date packet of receiving, its value equals the sequence number of this packet, takies two bytes; Type of data packet takies four bits, and priority is to mean with 4 bits this packet transmits in network priority; Verification and for the checking data bag, data field is deposited the data that will transmit.
3. the real-time spacecraft data transmission method of the height of a kind of Priority-based according to claim 1, it is characterized in that: the real-time spacecraft transfer of data of the height of described Priority-based occurs in transport network layer.
4. the real-time spacecraft data transmission method of the height of a kind of Priority-based according to claim 2, it is characterized in that: described type of data packet comprises ACK, SYN, FIN and RST;
ACK equals at 1 o'clock, shows that this packet is to confirm packet; SYN equals at 1 o'clock, and this packet is the packet that request connects; FIN equals at 1 o'clock, and this packet is the packet of release connection; RST equals at 1 o'clock, and this packet is the packet that refusal connects.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104125161A (en) * | 2014-08-14 | 2014-10-29 | 三星电子（中国）研发中心 | Data priority distinguishing multicast transmission method, data priority distinguishing multicast transmission system and data priority distinguishing multicast transmission device |
| CN105024945A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子有限公司 | Mode of information interaction among multiple processors |
| CN106452679A (en) * | 2016-11-05 | 2017-02-22 | 杭州畅动智能科技有限公司 | Robot development system and communication method thereof |
| CN107294581A (en) * | 2016-03-30 | 2017-10-24 | 景略半导体(上海)有限公司 | Multi-antenna transmission, single antenna reception, multi-aerial transmission system and method |
| CN107426185A (en) * | 2017-06-22 | 2017-12-01 | 北京佰才邦技术有限公司 | A kind of communication means and system |
| CN108647161A (en) * | 2018-04-17 | 2018-10-12 | 北京控制工程研究所 | A kind of hardware observation circuit of record memory access address history |
| WO2020119347A1 (en) * | 2018-12-13 | 2020-06-18 | 广州市百果园信息技术有限公司 | Message transmission method, apparatus, device and medium |
| CN116017560A (en) * | 2022-12-27 | 2023-04-25 | 深圳市领创星通科技有限公司 | Data forwarding method and system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024945A (en) * | 2014-04-30 | 2015-11-04 | 惠州市德赛西威汽车电子有限公司 | Mode of information interaction among multiple processors |
| CN104125161A (en) * | 2014-08-14 | 2014-10-29 | 三星电子（中国）研发中心 | Data priority distinguishing multicast transmission method, data priority distinguishing multicast transmission system and data priority distinguishing multicast transmission device |
| CN104125161B (en) * | 2014-08-14 | 2017-09-01 | 三星电子（中国）研发中心 | Distinguish multicast transmission method, system and the device of data priority |
| CN107294581A (en) * | 2016-03-30 | 2017-10-24 | 景略半导体(上海)有限公司 | Multi-antenna transmission, single antenna reception, multi-aerial transmission system and method |
| CN106452679A (en) * | 2016-11-05 | 2017-02-22 | 杭州畅动智能科技有限公司 | Robot development system and communication method thereof |
| CN106452679B (en) * | 2016-11-05 | 2020-11-20 | 杭州畅动智能科技有限公司 | Robot development system and communication method thereof |
| CN107426185A (en) * | 2017-06-22 | 2017-12-01 | 北京佰才邦技术有限公司 | A kind of communication means and system |
| CN108647161A (en) * | 2018-04-17 | 2018-10-12 | 北京控制工程研究所 | A kind of hardware observation circuit of record memory access address history |
| WO2020119347A1 (en) * | 2018-12-13 | 2020-06-18 | 广州市百果园信息技术有限公司 | Message transmission method, apparatus, device and medium |
| CN116017560A (en) * | 2022-12-27 | 2023-04-25 | 深圳市领创星通科技有限公司 | Data forwarding method and system |
| CN116017560B (en) * | 2022-12-27 | 2024-04-19 | 深圳市领创星通科技有限公司 | Data forwarding method and system |
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Application publication date: 20131127 |