CN112243268A - Multi-stream transmission control method based on QUIC protocol - Google Patents
Multi-stream transmission control method based on QUIC protocol Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/10—Flow control between communication endpoints
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- H04W76/15—Setup of multiple wireless link connections
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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
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- 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
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Abstract
The invention provides a multi-stream transmission control method based on a QUIC protocol.A client establishes a control channel, sends bandwidth, time delay and packet loss rate information of a network card of equipment to a server, and establishes multi-substream transmission service; dividing user program data of a client, distributing unique identification to each divided data segment, issuing the unique identification to each sub-stream for transmission, recombining data according to the unique identification after a server receives the data segments through a plurality of sub-streams, and delivering the data to an upper application to complete a multi-stream transmission task; according to different characteristics of user services, the bandwidths of a plurality of network cards can be aggregated to provide a larger throughput bandwidth for users; selecting sub-streams with smaller transmission delay for data transmission, and simultaneously transmitting the same service in a redundant manner through a plurality of sub-streams, thereby improving the transmission quality; in addition, the sub-flows of the connection can be dynamically added and deleted according to the network access condition of each device and the user requirement, so that the network transmission quality of the user in a high-frequency mobile environment can be improved.
Description
Technical Field
The invention relates to the technical field of mobile communication, in particular to a multi-stream transmission control method based on a QUIC protocol.
Background
In the past few years, the traffic of mobile terminals has increased exponentially due to the rapid development of mobile communication networks and intelligent terminals. The coming of the 5G era further improves the bandwidth of the network and greatly reduces the time delay of the network. At present, many devices basically support multiple network access modes, such as mobile cellular network access (3G, 4G, 5G) supported by a mobile phone, WIFI access, and the like. There is still a drawback that only one network access method can be used at a time.
With emerging applications such as car networking, VR, network teaching, telemedicine, netmeeting, the problem of time delay and bandwidth also become more and more prominent. Due to the fact that the requirements of the applications on real-time performance are very high, once time delay is too long and bandwidth is insufficient, VR pictures are asynchronous, video is blocked, frames are dropped, user experience is affected, and the applications are very large potential safety hazards for car networking and remote medical care.
According to the current network development situation, more and more users spend network traffic on the mobile side. Smart phones are developed more and more, and tools which people rely on in life and work are slowly migrated to mobile terminals. Therefore, most of the environments where people access the internet are in a mobile environment, and frequent switching of the network in the mobile environment also causes frequent disconnection of the network connection of the application program of the user, thereby reducing the user experience.
Therefore, it is urgently needed to make full use of multiple network access interfaces of the terminal device to serve the user at the same time, and intelligently select the most suitable network access link according to the user's needs to improve the user experience.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a multi-stream transmission control method for an equipment terminal with various network interfaces, which can provide services for an upper application program by using a plurality of interfaces simultaneously, and can intelligently select a proper link according to service requirements so as to achieve the effects of providing a network access service with larger network bandwidth and smaller time delay dynamically for a user.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the technical scheme that:
a multi-stream transmission control method based on QUIC protocol, the customer end sets up the control channel, send bandwidth, time delay, packet loss rate information of the network card of the apparatus to the server end, set up the transmission service of the multi-substream; dividing user program data of a client, distributing unique identification to each divided data segment, issuing the unique identification to each sub-stream for transmission, recombining data according to the unique identification after a server receives the data segments through a plurality of sub-streams, and delivering the data to an upper application to complete a multi-stream transmission task; the method comprises the following specific steps:
step S1, the server runs a service program and waits for the connection of the client;
step S2, the client runs the user program, connects with the server, establishes the control channel to obtain and send the bandwidth and time delay parameter needed by the client service, the number of the network card interface and the bandwidth parameter corresponding to each network card, and requests to establish the multi-stream transmission connection;
step S3, the server side matches the bandwidth, time delay and packet loss rate information of the server network card according to the connection request and operation information sent by the client side, returns the address port information of the sub server side connected with a plurality of network cards to the client side, and establishes a sub flow monitoring program;
step S4, the client receives the information returned by the server, establishes the corresponding sub-flow according to the response of the server, binds the corresponding network card, and requests the connection establishment of each sub-flow; after the sub-flows are connected, the control channel still keeps connection; step S5, when the client user program issues the data to be transmitted, the data service types are divided into: any network card bandwidth can not meet the large bandwidth requirement service required by a user, the small delay requirement service with the time delay less than 5ms and the high transmission quality requirement service with the packet loss rate less than one ten thousandth; when the data service type is a large bandwidth demand service, dividing the data into sizes suitable for the transmission of the sub-streams according to the real-time throughput, the maximum bandwidth, the packet loss rate and the time delay of each sub-stream, allocating unique identifiers, and simultaneously transmitting the unique identifiers on the corresponding sub-streams; when the data service type is a small-delay demand service, sequencing sub-streams according to delay, dividing data, allocating unique identifiers, packaging into data packets, and preferentially selecting the sub-stream with lower delay to transmit the data packet; when the data traffic type is high transmission quality demand traffic, a copy of the data is sent once per sub-stream.
Further, in step S1, when the server runs the service program, the server automatically obtains information of all network cards owned by the server in the background, and periodically obtains uplink and downlink throughput rates of the network cards, and client time delays and packet loss rates connected to the network cards.
Further, in step S2, after the client application program runs, all network card information of the current mobile terminal that can access the network is detected, and the network card information is sent to the server through the request packet; the network card information comprises bandwidth, time delay and packet loss rate.
Further, in step S3, the network cards with the difference between the remaining bandwidths of the server side and the client side being less than 5% are directly matched according to the bandwidth maximization principle through the bandwidth, delay, and packet loss rate parameters of each network card sent by the client, and the remaining network cards are respectively arranged in a descending order according to the remaining bandwidth values and are matched in a one-to-one correspondence according to the ordering result; when the residual bandwidth of the network card is more than or equal to the sum of the residual bandwidths of the network cards of the corresponding ends, matching the network cards together; when the time delay values of the network cards on the server side are sequenced according to the minimum time delay principle, the network card with the minimum time delay value is matched with the network card with the minimum time delay value of the client side; after matching, the bandwidth, time delay and packet loss rate information of the network card of the client and the IP and port information of the corresponding server are packaged and fed back to the client.
Further, in step S5, when the data traffic type is a large bandwidth demand traffic, the data is proportionally divided according to the bandwidth of each sub-stream.
Further, the specific steps of transmitting data by each sub-stream are as follows:
step A1, each sub-flow of the client obtains a data packet cache containing the unique identifier from the multi-flow transmission controller of the client and sends the data packet cache, and waits for an ACK containing the unique identifier at the server side;
step A2, each subflow of the server receives the data packet sent by the subflow of the client, responds to the ACK containing the unique identifier, and delivers the data packet to the multi-stream transmission controller of the server;
step A3, the client receives the ACK, deletes the data packet from the buffer, completes the sending of a data packet, and judges whether there is a retransmission data packet allocated to the current sub-stream; when the retransmission data packet exists, transmitting retransmission data; when there is no retransmission data, the transmission ends.
Has the advantages that: the invention has the following advantages:
(1) the control method provided by the invention can simultaneously use a plurality of network access interfaces to transmit data, thereby providing larger bandwidth for users.
(2) The invention adopts a method for dynamically reducing time delay, and when a single link generates network fluctuation, other links with smaller time delay and more stability are selected for transmission.
(3) The invention provides a more stable mobile environment experience, in the mobile environment, when a certain access interface is disconnected, other links are still connected, and the network access in the mobile environment is not interrupted.
(4) The invention adopts a mode of multi-path redundant transmission of duplicate data, and has higher transmission quality.
Drawings
FIG. 1 is a network architecture diagram of a multiple stream transmission control architecture based on QUIC protocol according to the present invention;
fig. 2 is a flowchart of a multiple stream transmission control method based on the QUIC protocol according to the present invention;
FIG. 3 is a flow chart of the sub-stream transmission provided by the present invention;
fig. 4 is a schematic diagram of buffering in data packet transmission in the sub-stream transmission operation provided in the present invention;
fig. 5 is a schematic diagram illustrating maximum bandwidth principle matching in a multiflow control method according to the present invention;
fig. 6 is a schematic diagram of a multi-stream transmission controller for allocating data packets to sub-streams according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the network architecture of the multiple stream transmission control architecture based on the QUIC protocol according to the present invention includes a multiple stream transmission control part and a sub-stream transmission part. The multi-stream transmission control part is used for establishing multi-stream transmission, matching sub-streams of the client and the server, dynamically adding and deleting the sub-streams, requesting retransmission when the data packet is lost, and distributing retransmission data packets. The sub-stream transmission part is responsible for transmitting the data packets allocated by the multi-stream transmission controller. The client establishes a control channel, sends information of bandwidth, time delay and packet loss rate of a network card of the equipment to the server, and establishes multi-substream transmission service; and the server side receives the data segments through a plurality of sub-streams, recombines the data according to the unique identification and delivers the data to an upper layer application, and completes the multi-stream transmission task.
As shown in fig. 2, the multiflow control part of the present invention includes the following steps:
and step S1, the server runs the service program and waits for the connection of the client. When the service program is running, all network card information owned by the server side is automatically acquired in the background, and the uplink and downlink throughput rate of each network card, the client time delay connected to each network card and the packet loss rate are periodically acquired.
Step S2, the client runs the user program, connects with the server, establishes a control channel, acquires and sends bandwidth and delay parameters required by the client service, the number of network card interfaces and bandwidth parameters corresponding to each network card, and requests to establish a multi-stream transmission connection. After the application program of the client side runs, detecting all network card information of the current mobile terminal, which can access the network, and sending the network card information to a server through a request data packet; the network card information comprises bandwidth, time delay and packet loss rate.
And step S3, the server side matches the bandwidth, time delay and packet loss rate information of the server network card according to the connection request and the operation information sent by the client side, returns the address port information of the sub server side connected with a plurality of network cards to the client side, and establishes a sub flow monitoring program. And matching the network cards at the server side and the client side according to the maximum bandwidth principle or the minimum delay principle through the bandwidth, delay and packet loss rate information of each network card at the client side, which is sent by the client, and after the matching is finished, packaging and responding the bandwidth, delay and packet loss rate information of the network card at the client side and the IP and port information of the corresponding network card at the server side to the client. The bandwidth maximization principle is that the server side and the client side are directly matched with each other, the server side and the client side are respectively arranged in a descending order according to the residual bandwidth values if the residual bandwidth is close (the difference is less than 5%), the server side and the client side are correspondingly matched with each other one by one according to the sorting result, if the residual bandwidth of one network card is greater than or equal to the sum of the residual bandwidths of a plurality of network cards of the opposite end (the opposite end of the server is the client, and the opposite end of the client is the server), the network card and the client side are matched together, and the matching sample is. And (3) when the minimum delay principle is to sort the delay values of the network cards on the server side, matching the network card with the minimum delay value with the network card with the minimum client delay value.
Step S4, the client receives the information returned by the server, establishes the corresponding sub-flow according to the response of the server, binds the corresponding network card, and requests the connection establishment of each sub-flow; after the sub-streams are connected, the control channel remains connected. The client establishes a plurality of sub-streams according to the received information, binds each sub-stream to a corresponding network card and initiates connection to a corresponding IP and port.
Step S5, when the client user program issues the data to be transmitted, the data service types are divided into: any network card bandwidth can not meet the large bandwidth requirement service required by a user, the small delay requirement service with the time delay less than 5ms and the high transmission quality requirement service with the packet loss rate less than one ten thousandth; when the data service type is a large bandwidth demand service, the data is divided into sizes suitable for the transmission of the sub-streams according to the real-time throughput, the maximum bandwidth, the packet loss rate and the time delay of each sub-stream, unique identifiers are distributed, and the data are transmitted on the corresponding sub-streams at the same time. As shown in fig. 6, data is divided proportionally according to the bandwidth of each sub-stream, and the larger the divided data packet is, the larger the bandwidth is. The unique identifier, i.e., a sequence number, may be used for data reordering at the receiving end. The size of the data packet divided by the sub-stream with 4M bandwidth should be 4/3 of the sub-stream with 3M bandwidth. When the data service type is a small-delay requirement service, dividing data, distributing a unique identifier, packaging into data packets, sequencing all sub-streams according to delay, and transmitting data only by using the sub-stream with smaller delay; when the data traffic type is high transmission quality demand traffic, a copy of the data is sent once per sub-stream. User data is transmitted once in each sub-stream to improve the reliability of the transmission.
The sub-stream transmission part of the present invention is shown in fig. 3, and the transmission steps are specifically as follows:
step A1, each sub-flow of the client obtains a data packet cache containing the unique identifier from the multi-flow transmission controller of the client and sends the data packet cache, and waits for an ACK containing the unique identifier at the server side;
step A2, each subflow of the server receives the data packet sent by the subflow of the client, responds to the ACK containing the unique identifier, and delivers the data packet to the multi-stream transmission controller of the server;
step A3, the client receives the ACK, deletes the data packet from the buffer, completes the sending of a data packet, and judges whether there is a retransmission data packet allocated to the current sub-stream; when the retransmission data packet exists, transmitting retransmission data; when there is no retransmission data, the transmission ends.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. A multi-stream transmission control method based on QUIC protocol is characterized in that a client establishes a control channel, sends bandwidth, time delay and packet loss rate information of a network card of equipment to a server, and establishes multi-sub-stream transmission service; dividing user program data of a client, distributing unique identification to each divided data segment, issuing the unique identification to each sub-stream for transmission, recombining data according to the unique identification after a server receives the data segments through a plurality of sub-streams, and delivering the data to an upper application to complete a multi-stream transmission task; the method comprises the following specific steps:
step S1, the server runs a service program and waits for the connection of the client;
step S2, the client runs the user program, connects with the server, establishes a control channel to obtain and send the bandwidth, time delay parameter, number of network card interfaces and bandwidth parameter corresponding to each network card needed by the client service, and requests to establish multi-stream transmission connection;
step S3, the server side matches the bandwidth, time delay and packet loss rate information of the server network card according to the connection request and operation information sent by the client side, returns the address port information of the sub server side connected with a plurality of network cards to the client side, and establishes a sub flow monitoring program;
step S4, the client receives the information returned by the server, establishes the corresponding sub-flow according to the response of the server, binds the corresponding network card, and requests the connection establishment of each sub-flow; after the sub-flows are connected, the control channel still keeps connection;
step S5, when the client user program issues the data to be transmitted, the data service types are divided into: any network card bandwidth can not meet the large bandwidth requirement service required by a user, the small delay requirement service with the time delay less than 5ms and the high transmission quality requirement service with the packet loss rate less than one ten thousandth; when the data service type is a large bandwidth demand service, dividing the data into sizes suitable for the transmission of the sub-streams according to the real-time throughput, the maximum bandwidth, the packet loss rate and the time delay of each sub-stream, allocating unique identifiers, and simultaneously transmitting the unique identifiers on the corresponding sub-streams; when the data service type is a small-delay demand service, sequencing sub-streams according to delay, dividing data, allocating unique identifiers, packaging into data packets, and preferentially selecting the sub-stream with lower delay to transmit the data packet; when the data traffic type is high transmission quality demand traffic, a copy of the data is sent once per sub-stream.
2. The method according to claim 1, wherein in step S1, when the server runs the service program, the server automatically obtains bandwidth, delay, and packet loss information of all network cards owned by the server in the background, and periodically obtains uplink and downlink throughput rates of each network card, client delay and packet loss rate connected to each network card.
3. The method for controlling multiflow according to the QUIC protocol of claim 1, wherein in step S2, after the client application program is running, all network card information of the current mobile terminal that can access the network is detected, and the network card information is sent to the server via a request packet; the network card information comprises bandwidth, time delay and packet loss rate.
4. The multiple stream transmission control method based on the QUIC protocol according to claim 1, wherein in step S3, network cards with a difference of less than 5% in remaining bandwidth on the server side and the client side are directly matched according to the principle of maximum bandwidth through parameters of bandwidth, delay, and packet loss rate of each network card sent by the client, and the remaining network cards are arranged in a descending order respectively according to the remaining bandwidth values and are matched in a one-to-one correspondence according to the result of the ordering; when the residual bandwidth of the network card is more than or equal to the sum of the residual bandwidths of the network cards of the corresponding ends, matching the network cards together; when the time delay values of the network cards on the server side are sequenced according to the minimum time delay principle, the network card with the minimum time delay value is matched with the network card with the minimum time delay value of the client side; after matching, the bandwidth, time delay and packet loss rate information of the network card of the client and the IP and port information of the corresponding server are packaged and fed back to the client.
5. The method for controlling multiple streaming according to claim 1, wherein in step S5, when the data traffic type is large bandwidth demand traffic, the data is divided proportionally according to the bandwidth of each sub-stream.
6. The method for controlling multiple stream transmission based on QUIC protocol according to claim 1, wherein said sub-streams transmit data by the following steps:
step A1, each sub-flow of the client obtains a data packet cache containing the unique identifier from the multi-flow transmission controller of the client and sends the data packet cache, and waits for an ACK containing the unique identifier at the server side;
step A2, each subflow of the server receives the data packet sent by the subflow of the client, responds to the ACK containing the unique identifier, and delivers the data packet to the multi-stream transmission controller of the server;
step A3, the client receives the ACK, deletes the data packet from the buffer, completes the sending of a data packet, and judges whether there is a retransmission data packet allocated to the current sub-stream; when the retransmission data packet exists, transmitting retransmission data; when there is no retransmission data, the transmission ends.
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| CN113438324A (en) * | 2021-08-25 | 2021-09-24 | 北京拙成科技发展有限公司 | Digital information transmission method and system |
| CN113676741A (en) * | 2021-07-19 | 2021-11-19 | Oppo广东移动通信有限公司 | Data transmission method, device, storage medium and electronic equipment |
| CN113824540A (en) * | 2021-10-29 | 2021-12-21 | 中国电信股份有限公司 | Multicast retransmission method, device, server and storage medium |
| CN114501072A (en) * | 2021-12-29 | 2022-05-13 | 伟乐视讯科技股份有限公司 | Media stream transmission system based on RIST protocol |
| WO2023035885A1 (en) * | 2021-09-13 | 2023-03-16 | 华为技术有限公司 | Communication method and electronic device |
| WO2024022335A1 (en) * | 2022-07-26 | 2024-02-01 | 抖音视界有限公司 | Data transmission method, apparatus and system |
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| WO2024022335A1 (en) * | 2022-07-26 | 2024-02-01 | 抖音视界有限公司 | Data transmission method, apparatus and system |
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