CN116545948A - Reliable communication method based on UDP protocol - Google Patents
Reliable communication method based on UDP protocol Download PDFInfo
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- CN116545948A CN116545948A CN202310578636.3A CN202310578636A CN116545948A CN 116545948 A CN116545948 A CN 116545948A CN 202310578636 A CN202310578636 A CN 202310578636A CN 116545948 A CN116545948 A CN 116545948A
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- numbers
- kcp
- retransmission
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000004891 communication Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 31
- 238000005538 encapsulation Methods 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 3
- 238000012795 verification Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/34—Flow control; Congestion control ensuring sequence integrity, e.g. using sequence numbers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
- H04L69/164—Adaptation or special uses of UDP protocol
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/26—Special purpose or proprietary protocols or architectures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate
Abstract
The invention discloses a reliable communication method based on UDP protocol, which is based on UDP protocol, the data packet is numbered before data transmission, the numbers are assembled into the data packet at the same time during transmission, KCP protocol is used as an auxiliary port of a main communication port for transmitting retransmission instructions. The method has the following advantages: the data packets are numbered before transmission, the receiving end receives each data packet, and after unpacking, the data packet numbers are analyzed to quickly determine whether the data packets are lost. After the receiving end judges that the packet is lost, the receiving end returns a data retransmission instruction through KCP, so that the transmission of the retransmission instruction is reliable. When the network is severely congested, the data of the retransmission instruction is very small, and when the data transmitting end receives the retransmission instruction returned by the KCP, the network can be assumed to be unblocked, and the unnecessary bandwidth waste can be effectively reduced by retransmitting the data again.
Description
Technical Field
The invention relates to the technical field of computer networks and applications, in particular to a reliable communication method based on UDP protocol.
Background
In the network application development process, a TCP protocol or a UDP protocol may be used.
TCP is a connection-oriented communication protocol, and before data transmission, there is a three-way handshake to establish connection, and when data is transmitted, there is a mechanism of acknowledgement, window, retransmission, congestion control, so that the correctness of data can be ensured, and the TCP is more reliable, and after data transmission is completed, the TCP is disconnected to save system resources. But its transmission speed is slow, its efficiency is low, and its occupied system resource is high. TCP requires a connection to be established before data is transferred, which consumes a lot of time, and during data transfer, an acknowledgement mechanism, a retransmission mechanism, a congestion control mechanism, etc. consume a lot of time, and all transmission connections are maintained on each device, and in fact, each connection occupies hardware resources such as CPU and memory of the system.
UDP is a connectionless communication protocol, and UDP data comprises destination port number and source port number information, so that the speed is high, the operation is simple, less system resources are required, and broadcast transmission can be realized because communication does not need connection. Because there is no mechanism for handshaking, acknowledgement, window, retransmission, congestion control, etc. of TCP, it is very fast in delivering data. However, the transmission is unreliable and unstable, because UDP does not have a reliable mechanism such as TCP, and when data is transferred, if the network quality is poor, packets are easily lost, resulting in data loss.
KCP is a fast and reliable protocol, which does not specify an underlying transport protocol, but is an implementation of a pure algorithm, but generally uses UDP as the underlying protocol, so that it can be said that KCP is a fast and reliable UDP in general, at the cost of 10% -20% of the bandwidth wasted by TCP, with a 30% -40% reduction in average delay, and a three-fold reduction in maximum delay. In view of the above drawbacks, it is necessary to design a reliable communication method based on the UDP protocol.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: a reliable communication method based on UDP protocol is provided to solve the problems set forth in the background art.
In order to solve the technical problems, the technical scheme of the invention is as follows: a reliable communication method based on UDP protocol is carried out according to the following steps:
(1) UDP communication instance creation: two UDP protocol ports are respectively opened by two communication parties, one of the ports is used as a data port, the other port is used as a transmission control port by adopting a KCP encapsulation protocol, and the process requires a client program to create two UDP communication examples and bind the two ports, wherein one port is used for data transmission, and the other port is used for KCP encapsulation and is used for transmission instruction transmission;
(2) Initializing data numbers: before the data port transmits data, the data are numbered and the numbers are assembled into data packets, in the process, a data transmitting end and a data receiving end need to initialize a data number for recording the number of the data packets and checking the number of the data packets and the two sides, and the data packets can be transmitted after the numbers and the data are assembled and coded;
(3) Checking the data number: the receiving end unpacks the received data packet and performs data number verification, the process is that the data receiving end receives the data packet, the data number is identified after decoding, and whether the local data number is consistent with the data packet number is verified;
(4) Data transfer: if the packet loss or the packet error is judged, a retransmission instruction is sent to a data sender through the KCP, the data sender retransmits the data packet from the packet error number after receiving the retransmission instruction, the process normally receives and retransmits the processed data, and if the numbers of the two are inconsistent, a retransmission instruction is sent through the KCP port.
Further, the creation of a data number, the process will instantiate a variable with a value of 0; data encapsulation, wherein the process encapsulates the data number and the data, and can adopt JSON format encapsulation; data coding, wherein the data is coded into a byte array according to a contracted coding mode in the process; and data is sent, and the process transmits the data packet through a data channel.
Further, the process receives data packets through the data channel; identifying a data number, decoding the data packet according to a contracted encoding mode, and reading the data number in the data packet after decoding and comparing with a local number; if the numbers are not consistent, entering a retransmission flow, and if the numbers are consistent, updating the data numbers; and sending a retransmission command, wherein the retransmission command and the data number which should be received are packaged in the process, and the data sending end is informed to carry out data retransmission through a KCP channel.
Compared with the prior art, the reliable communication method based on the UDP protocol is based on the UDP protocol, the data packet is numbered before data transmission, the numbers are simultaneously assembled into the data packet during transmission, and the KCP protocol is used as an auxiliary port of the main communication port and used for transmitting retransmission instructions. The method has the following advantages: the data packets are numbered before transmission, the receiving end receives each data packet, and after unpacking, the data packet numbers are analyzed to quickly determine whether the data packets are lost. After the receiving end judges that the packet is lost, the receiving end returns a data retransmission instruction through KCP, so that the transmission of the retransmission instruction is reliable. When the network is severely congested, the data of the retransmission instruction is very small, and when the data transmitting end receives the retransmission instruction returned by the KCP, the network can be assumed to be unblocked, and the unnecessary bandwidth waste can be effectively reduced by retransmitting the data again.
Drawings
FIG. 1 is a schematic workflow diagram of the present invention;
FIG. 2 is a schematic diagram of a data transmission flow of the present invention;
fig. 3 is a schematic diagram of a data receiving process according to the present invention.
Detailed Description
In the following, numerous specific details are set forth in order to provide a thorough understanding of the concepts underlying the described embodiments. It will be apparent, however, to one skilled in the art that the described embodiments may be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail.
Examples
The reliable communication method based on the UDP protocol listed in the embodiment is carried out by the following steps that two UDP protocol ports are respectively opened by two communication parties, one of the two UDP protocol ports is used as a data port, the other one of the two UDP protocol ports adopts KCP encapsulation protocol as a transmission control port, a client program is required to create two UDP communication examples and bind the two ports, one port is used for data transmission, and the other port is used for KCP encapsulation and is used for transmission of transmission instructions; before the data port transmits data, the data are numbered and the numbers are assembled into data packets, in the process, a data transmitting end and a data receiving end need to initialize a data number for recording the number of the data packets and checking the number of the data packets and the two sides, and the data packets can be transmitted after the numbers and the data are assembled and coded; the receiving end unpacks the received data packet and performs data number verification, the process is that the data receiving end receives the data packet, the data number is identified after decoding, and whether the local data number is consistent with the data packet number is verified; if the packet loss or the packet error is judged, a retransmission instruction is sent to a data sender through the KCP, the data sender retransmits the data packet from the packet error number after receiving the retransmission instruction, the process normally receives and retransmits the processed data, and if the numbers of the two are inconsistent, a retransmission instruction is sent through the KCP port.
Creating a data number, which instantiates a variable with a value of 0; data encapsulation, wherein the process encapsulates the data number and the data, and can adopt JSON format encapsulation; data coding, wherein the data is coded into a byte array according to a contracted coding mode in the process; and data is sent, and the process transmits the data packet through a data channel.
Receiving data, the process receiving data packets via a data channel; identifying a data number, decoding the data packet according to a contracted encoding mode, and reading the data number in the data packet after decoding and comparing with a local number; if the numbers are not consistent, entering a retransmission flow, and if the numbers are consistent, updating the data numbers; and sending a retransmission command, wherein the retransmission command and the data number which should be received are packaged in the process, and the data sending end is informed to carry out data retransmission through a KCP channel.
The reliable communication method based on the UDP protocol is characterized in that the data packet is numbered before data transmission based on the UDP protocol, the numbers are simultaneously assembled into the data packet during transmission, and the KCP protocol is used as an auxiliary port of a main communication port for transmitting retransmission instructions. The method has the following advantages: the data packets are numbered before transmission, the receiving end receives each data packet, and after unpacking, the data packet numbers are analyzed to quickly determine whether the data packets are lost. After the receiving end judges that the packet is lost, the receiving end returns a data retransmission instruction through KCP, so that the transmission of the retransmission instruction is reliable. When the network is severely congested, the data of the retransmission instruction is very small, and when the data transmitting end receives the retransmission instruction returned by the KCP, the network can be assumed to be unblocked, and the unnecessary bandwidth waste can be effectively reduced by retransmitting the data again.
Claims (3)
1. A reliable communication method based on UDP protocol, characterized in that: the method comprises the following steps:
(1) UDP communication instance creation: two UDP protocol ports are respectively opened by two communication parties, one of the ports is used as a data port, the other port is used as a transmission control port by adopting a KCP encapsulation protocol, and the process requires a client program to create two UDP communication examples and bind the two ports, wherein one port is used for data transmission, and the other port is used for KCP encapsulation and is used for transmission instruction transmission;
(2) Initializing data numbers: before the data port transmits data, the data are numbered and the numbers are assembled into data packets, in the process, a data transmitting end and a data receiving end need to initialize a data number for recording the number of the data packets and checking the number of the data packets and the two sides, and the data packets can be transmitted after the numbers and the data are assembled and coded;
(3) Checking the data number: the receiving end unpacks the received data packet and performs data number verification, the process is that the data receiving end receives the data packet, the data number is identified after decoding, and whether the local data number is consistent with the data packet number is verified;
(4) Data transfer: if the packet loss or the packet error is judged, a retransmission instruction is sent to a data sender through the KCP, the data sender retransmits the data packet from the packet error number after receiving the retransmission instruction, the process normally receives and retransmits the processed data, and if the numbers of the two are inconsistent, a retransmission instruction is sent through the KCP port.
2. A reliable communication method based on the UDP protocol as claimed in claim 1, wherein said creating data numbers instantiates a variable with a value of 0; data encapsulation, wherein the process encapsulates the data number and the data, and can adopt JSON format encapsulation; data coding, wherein the data is coded into a byte array according to a contracted coding mode in the process; and data is sent, and the process transmits the data packet through a data channel.
3. A reliable communication method based on UDP according to claim 1, wherein said receiving data receives data packets via a data channel; identifying a data number, decoding the data packet according to a contracted encoding mode, and reading the data number in the data packet after decoding and comparing with a local number; if the numbers are not consistent, entering a retransmission flow, and if the numbers are consistent, updating the data numbers; and sending a retransmission command, wherein the retransmission command and the data number which should be received are packaged in the process, and the data sending end is informed to carry out data retransmission through a KCP channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578636.3A CN116545948A (en) | 2023-05-22 | 2023-05-22 | Reliable communication method based on UDP protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310578636.3A CN116545948A (en) | 2023-05-22 | 2023-05-22 | Reliable communication method based on UDP protocol |
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| Publication Number | Publication Date |
|---|---|
| CN116545948A true CN116545948A (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310578636.3A Pending CN116545948A (en) | 2023-05-22 | 2023-05-22 | Reliable communication method based on UDP protocol |
Country Status (1)
| Country | Link |
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| CN (1) | CN116545948A (en) |
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2023
- 2023-05-22 CN CN202310578636.3A patent/CN116545948A/en active Pending
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