WO2022134978A1

WO2022134978A1 - Data sending method and apparatus

Info

Publication number: WO2022134978A1
Application number: PCT/CN2021/131887
Authority: WO
Inventors: 任首首; 刘冰洋; 勒布德克·简-伊夫; 穆罕默德·伊桑; 艾法沃·阿拉丁
Original assignee: 华为技术有限公司
Priority date: 2020-12-23
Filing date: 2021-11-19
Publication date: 2022-06-30
Also published as: CN114666809A

Abstract

Provided are a data sending method and apparatus, which can guarantee the certainty of a time delay. The method comprises: at a moment t, a first device receiving first signaling, wherein the first signaling indicates that a second data stream leaves, and the first signaling comprises a first time delay T1, a second time delay T, a time delay adjustment step length θ and an adjustment time interval τ for the first data stream; within a time period from t to t+x, the first device sending first data to a second device, wherein the first data comprises first indication information, the first indication information comprises T1 and the actual time the first data stays in a queue system of the first device, and the first data is data in the first data stream; and within a time period from t+x+(N-2)τ to t+x+(N-1)τ, the first device sending Nth data to the second device, wherein the Nth data comprises Nth indication information, the Nth indication information comprises TN and the actual time the Nth data stays in the queue system of the first device, TN = T1-(N-1)θ, the Nth data is data in the first data stream, and TN is greater than or equal to T.

Description

Method and device for data transmission

This application claims the priority of the Chinese patent application with the application number 202011539631.2 and the application title "Method and Apparatus for Data Transmission" filed with the China Patent Office on December 23, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of communications, and more particularly, to a method and apparatus for data transmission.

Background technique

Deterministic networking is a hot spot in the current industry. The demand for deterministic networking comes from businesses such as the Industrial Internet, smart factories, remote programmable logic controllers (PLCs) and cloudification, as well as augmented reality (augmented reality). , AR)/virtual reality (VR) real-time interaction, remote surgery, tactile Internet and other remote real-time services, the core of which is to ensure the end-to-end bandwidth, delay and jitter of the service flow.

At present, in the packet sending scheme based on the shaper (damper) model, when an existing flow in the network leaves, the new deterministic delay after leaving is smaller than the original deterministic delay. Due to the departure of some flows, the actual burstiness of other still-existing flows through the same port is increased compared to that under the damper model. Since the new deterministic delay is calculated by using the original burst degree of the still existing flow, the increased burst degree is larger, so that the packet cannot be sent within the new deterministic delay time. The invariant characteristic of the hop-by-hop traffic model no longer holds, so deterministic latency cannot be guaranteed. On the other hand, due to the change of the deterministic delay, there may be several consecutive packets using the new deterministic delay and the original deterministic delay respectively, resulting in the possibility of the eligibility time of the later arriving packets. It will be earlier than the first-arrived packet, and out-of-order will occur.

SUMMARY OF THE INVENTION

The present application provides a method and apparatus for data transmission, which can ensure the certainty of delay.

In a first aspect, a method for sending data is provided, including: at time t, a first device receives a first signaling, the first signaling is used to instruct the second data stream to leave, and the first signaling includes The first delay difference ΔT ₁ or the first delay T ₁ and the second delay T, the delay adjustment step θ and the adjustment time interval τ for the first data stream, where T ₁ is the second delay The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device determined before the data stream leaves, T is determined after the second data stream leaves The sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device, where the second device receives the data sent by the first device Streaming device; in the period from t to t+x, the first device sends first data to the second device, the first data includes first indication information, and the first indication information includes T ₁ and the actual stay time of the first data in the queue system of the first device, the first data is the data in the first data stream, and x is a non-negative number; at t+x+(N-2 )τ to t+x+(N-1)τ period, the first device sends the Nth data to the second device, the Nth data includes the Nth indication information, and the Nth indication information includes It is used to indicate the sum T _N of the time that the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the queue of the first device. The actual stay time in the queue system, where T _N =T ₁ -(N-1)θ, the Nth data is the data in the first data stream, N is an integer greater than 1, and T _N is greater than or equal to T.

With reference to the first aspect, in some implementations of the first aspect, after the first device receives the first signaling, the method further includes: enabling, by the first device, a first qualifying schedule ETT, where the first ETT is used to update the qualified time of the first data stream sent by the third device.

With reference to the first aspect, in some implementations of the first aspect, the first signaling is sent by the controller.

In a second aspect, a method for sending data is provided, including: a second device receiving first data sent by a first device within a period of t to t+x, the first data including first indication information, the The first indication information includes T ₁ and the time that the first data actually stays in the queue system of the first device, where T ₁ is the first data stream determined before the second data stream leaves in the first data stream. The sum of the time spent in the queue system of a device and the time delayed in the second device, the first data is the data in the first data stream, and x is a non-negative number; the second device According to T1 and the time that the _first data actually stays in the queue system of the first device, determine the first moment when the first data is delayed in the second device and end; the second The device releases the first data at the first moment, so that the first data enters the queue system of the second device; the second device receives the first device at t+x+(N-2 )τ to t+x+(N-1)τ of the Nth data sent in the period, the Nth data includes the Nth indication information, and the Nth indication information The sum of the time spent in the queue system of the first device and the time delayed in the second device, T _N , and the time that the Nth data actually stayed in the queue system of the first device, where T _N =T1-(N-1)θ, θ is the delay adjustment step size, τ is the adjustment time interval, N is an integer greater than 1, the Nth data is the data in the first data stream, T _N greater than or equal to T, where T is the sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device after the second data stream leaves and; the second device determines, according to T _N and the time that the Nth data actually stays in the queue system of the first device, the time when the Nth data is delayed in the second device. Time N; the second device releases the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: enabling, by the second device, a second qualifying schedule ETT, so that the second ETT records the N-1th moment, wherein , the N-1th time is the time when the N-1th data is shaped in the second device; the second device releases the Nth data according to the Nth time, so that the Entering the Nth data into the queue system of the second device includes: if the Nth time is later than the N-1th time, enabling, by the second device, the data to be recorded in the second ETT table The N-1th time is updated to the Nth time, and the Nth data is released at the Nth time; if the Nth time is earlier than the N-1th time, the second device is at the The Nth data is released at the N-1th time.

With reference to the second aspect, in some implementations of the second aspect, before the second device receives the first data sent by the first device, the method further includes: at time t, the second device receives the control the first signaling sent by the device, the first signaling is used to instruct the second data stream to leave; the second device enables the second qualifying timetable ETT according to the first signaling, and the first signaling The second ETT is used to update the qualified time of the first data stream sent by the first device.

Based on the above technical solution, if the second data stream leaves, the delay of the first data stream flowing through the first device is determined by the gradient decreasing method, so as to ensure that the impact of the reduction of the delay on the increase of the burst degree of other devices is reduced. to the clock error level, thus ensuring the determinism of the delay.

In a third aspect, a method for sending data is provided, including: at time t, a first device receives a first signaling, where the first signaling is used to instruct the joining of a second data stream, and the first signaling contains It includes the second delay difference ΔT ₂ or the first delay T ₁ and the second delay T ₂ for the first data stream, the delay adjustment step size θ and the adjustment time interval τ, where ΔT ₂ =T ₂ − T ₁ , T ₁ is the sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device determined before the second data stream is added, T ₂ is the sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device determined after the second data stream is added. The second device is a device that receives the data stream sent by the first device; within the period from t _x to t _x +N*τ, the first device sends the Nth data to the second device, and the Nth data It includes the Nth indication information, and the Nth indication information includes the sum of the time T for indicating that the Nth data stays in the queue system of the first device and the time delayed in the second device _N and the actual stay time of the Nth data in the queue system of the first device, where t _x is time t or a time after time t, T _N =T ₁ +N*θ, the Nth data The data is the data in the first data stream, N is an integer greater than 0, and T _N is less than or equal to T ₂ .

In a fourth aspect, a method for sending data is provided, including: a second device receiving first data sent by a first device within _a period from t to t+T1, where the first data includes first indication information, and the The _first indication information includes T1 and the time that the first data actually stays in the queue system of the first device, wherein T1 is the _first data stream determined before the second data stream is added in the The sum of the time spent in the queue system of the first device and the time delayed in the second device, the first data is the data in the first data stream; the second device receives the first data. The Nth data sent by a device within a period from t _x to _tx +N*τ, the Nth data includes the Nth indication information, and the Nth indication information The sum of the time spent in the queue system of the first device and the time delayed in the second device T _N and the time that the Nth data actually stayed in the queue system of the first device, where t _x is time t or a time after time t, T _N =T ₁ +N*θ, θ is the delay adjustment step size, τ is the adjustment time interval, N is an integer greater than 0, and the Nth data is the For the data in the first data stream, T _N is less than or equal to T ₂ , where T ₂ is the difference between the time that the first data stream stays in the queue system of the first device determined after the second data stream is added. The sum of the time delayed in the second device; the second device determines that the _Nth data is in The Nth time when the delay ends in the second device; the second device releases the Nth data at the Nth time, so that the Nth data enters the queue system of the second device.

In a fifth aspect, a communication device is provided, comprising: a transceiver unit configured to receive a first signaling at time t, where the first signaling is used to instruct the second data stream to leave, and the first signaling includes The first delay difference ΔT ₁ or the first delay T ₁ and the second delay T, the delay adjustment step θ and the adjustment time interval τ for the first data stream, where T ₁ is the second delay The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device determined before the data stream leaves, T is the total time determined after the second data stream leaves. The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device, where the second device receives the data stream sent by the first device. device; the transceiver unit is further configured to send first data to the second device within a period from t to t+x, where the first data includes first indication information, and the first indication information includes T ₁ and the actual stay time of the first data in the queue system of the first device, the first data is the data in the first data stream, and x is a non-negative number; the transceiver unit is also used for , during the period from t+x+(N-2)τ to t+x+(N-1)τ, send the Nth data to the second device, where the Nth data includes the Nth indication information, and the Nth data The N indication information includes the sum TN for indicating the time the Nth data stays in the queue system of the first device and the time delayed in the second device, and the _Nth data in the The actual stay time in the queue system of the first device, where TN=T1-(N-1)θ, the Nth data is the data in the first data stream, N is an integer greater than 1, and TN is greater than 1 or equal to T.

With reference to the fifth aspect, in some implementations of the fifth aspect, the communication device further includes a processing unit, the processing unit is configured to enable the first qualifying schedule ETT, the first ETT is configured to The qualified time of the first data stream sent by the three devices is updated.

With reference to the fifth aspect, in some implementations of the fifth aspect, the first signaling is sent by the controller.

In a sixth aspect, a communication apparatus is provided, comprising: a transceiver unit configured to receive first data sent by a first device within a period of time from t to t+x, where the first data includes first indication information, and the The first indication information includes T ₁ and the time that the first data actually stays in the queue system of the first device, where T ₁ is the first data stream determined before the second data stream leaves in the first data stream. The sum of the time spent in the queue system of one device and the time delayed in the second device, the first data is the data in the first data stream, and x is a non-negative number; the processing unit is used for according to T ₁ and the actual stay time of the first data in the queue system of the first device to determine the first moment when the first data is delayed in the second device; the processing unit also uses At the first moment, the first data is released, so that the first data enters the queue system of the second device; the transceiver unit is further configured to receive the first device at t+x+ (N-2)τ to t+x+(N-1)τ of the Nth data sent in the period, the Nth data includes the Nth indication information, and the Nth indication information includes the information used to indicate the Nth The sum of the time that the data stays in the queue system of the first device and the time delayed in the second device T _N and the time that the Nth data actually stays in the queue system of the first device , where T _N =T ₁ -(N-1)θ, θ is the delay adjustment step size, τ is the adjustment time interval, N is an integer greater than 1, and the Nth data is in the first data stream data, T _N is greater than or equal to T, and T is the difference between the time that the first data stream stays in the queue system of the first device determined after the second data stream leaves The sum of the delayed time; the processing unit is further configured to, according to T _N and the time that the Nth data actually stays in the queue system of the first device, determine that the Nth data is in the second The Nth time when the delay ends in the device; the processing unit is further configured to release the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device.

With reference to the sixth aspect, in some implementations of the sixth aspect, the processing unit is further configured to enable the second qualified timetable ETT, so that the second ETT records the N-1th moment, wherein the The N-1th time is the time when the N-1th data is reshaped in the second device; the processing unit is specifically configured to: if the Nth time is later than the N-1th time, then Enable the second ETT table to update the recorded N-1th time to the Nth time, and release the Nth data at the Nth time; if the Nth time is earlier than the Nth time At time N-1, the Nth data is released at the N-1th time.

With reference to the sixth aspect, in some implementations of the sixth aspect, the transceiver unit is further configured to receive a first signaling sent by the controller at time t, where the first signaling is used to indicate the second signaling The data stream leaves; the processing unit is further configured to, according to the first signaling, enable a second qualified timetable ETT, where the second ETT is used for the first data stream sent by the first device The qualifying time is updated.

In a seventh aspect, a communication device is provided, comprising: a transceiver unit configured to receive a first signaling at time t, where the first signaling is used to instruct the joining of a second data stream, and the first signaling includes The second delay difference ΔT ₂ or the first and second delays T ₁ and T ₂ , the delay adjustment step θ and the adjustment time interval τ for the first data stream, where ΔT ₂ =T ₂ −T ₁ , T1 is the sum of the time that the _first data stream stays in the queue system of the first device and the time that is delayed in the second device determined before the _second data stream is added, T2 is the sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device after the second data stream is added, the second data stream is The device is a device that receives the data stream sent by the first device; the transceiver unit is further configured to send the Nth data to the second device within the period from t _x to t _x +N*τ, the The Nth data includes the Nth indication information, and the Nth indication information includes the time between the time that the Nth data stays in the queue system of the first device and the time that is delayed in the second device. and T _N and the actual stay time of the Nth data in the queue system of the first device, where t _x is the time at or after time t, T _N =T ₁ +N*θ, the The Nth data is data in the first data stream, N is an integer greater than 0, and T _N is less than or equal to T ₂ .

In an eighth aspect, a communication device is provided, comprising: a transceiver unit configured to receive first data sent by a first device within _a period of t to t+T1, where the first data includes first indication information, and the The _first indication information includes T1 and the time that the first data actually stays in the queue system of the first device, wherein T1 is the _first data stream determined before the second data stream is added in the The sum of the time spent in the queue system of the first device and the time delayed in the second device, the first data is data in the first data stream; the transceiver unit is further configured to receive The Nth data sent by the first device in the period from t _x to _tx +N*τ, the Nth data includes the Nth indication information, and the Nth indication information includes the Nth data for indicating the Nth data The sum T _N of the time spent in the queue system of the first device and the time delayed in the second device and the time that the Nth data actually stayed in the queue system of the first device, Among them, t _x is time t or time after time t, T _N =T ₁ +N*θ, θ is the delay adjustment step size, τ is the adjustment time interval, N is an integer greater than 0, the Nth data is the data in the first data stream, T _N is less than or equal to T ₂ , and T ₂ is the first data stream determined after the second data stream is added to stay in the queue system of the first device The sum of the time and the time delayed in the second device; the processing unit is further configured to, according to T _N and the actual stay time of the Nth data in the queue system of the first device, determine The Nth time when the Nth data is delayed in the second device; the processing unit is further configured to release the Nth data at the Nth time, so that the Nth data enters the the queue system of the second device.

In a ninth aspect, a communication device is provided, comprising: a processor and a transceiver, the transceiver is configured to receive computer code or instructions and transmit them to the processor, and the processor executes the computer code or instructions, such as The method of the first aspect or any possible implementation of the first aspect.

In a tenth aspect, a communication device is provided, comprising: a processor and a transceiver, wherein the transceiver is configured to receive computer code or instructions and transmit them to the processor, and the processor executes the computer code or instructions, such as The method of the second aspect or any possible implementation of the second aspect.

In an eleventh aspect, a communication device is provided, comprising: a processor and a transceiver, wherein the transceiver is configured to receive computer code or instructions and transmit them to the processor, and the processor executes the computer code or instructions, A method as in the third aspect or any possible implementation manner of the third aspect.

A twelfth aspect provides a communication device, comprising: a processor and a transceiver, the transceiver is configured to receive computer code or instructions and transmit them to the processor, and the processor executes the computer code or instructions, A method as in the fourth aspect or any possible implementation manner of the fourth aspect.

A thirteenth aspect provides a computer-readable storage medium, where a computer program is stored in the computer-readable medium; when the computer program is run on a computer, the computer causes the computer to execute the first aspect or any possible implementation of the first aspect method in method.

A fourteenth aspect provides a computer-readable storage medium, where a computer program is stored in the computer-readable medium; when the computer program runs on a computer, the computer causes the computer to execute the second aspect or any possible implementation of the second aspect method in method.

A fifteenth aspect provides a computer-readable storage medium, where a computer program is stored in the computer-readable medium; when the computer program is run on a computer, the computer causes the computer to execute the third aspect or any possible implementation of the third aspect method in method.

A sixteenth aspect provides a computer-readable storage medium, where a computer program is stored in the computer-readable medium; when the computer program runs on a computer, the computer enables the computer to execute the fourth aspect or any possible implementation of the fourth aspect method in method.

Description of drawings

FIG. 1 is a schematic diagram of the formation process of burst accumulation.

FIG. 2 is a schematic diagram of the scheduling process of circular queuing and forwarding.

Figure 3 is a schematic diagram of the basic model of damper.

FIG. 4 is a schematic diagram of a system scenario to which this embodiment of the present application is applicable.

FIG. 5 is a schematic flowchart of a data sending method according to an embodiment of the present application.

FIG. 6 is a schematic block diagram of a communication apparatus according to an embodiment of the present application.

FIG. 7 is a schematic block diagram of another communication apparatus according to an embodiment of the present application.

FIG. 8 is a schematic block diagram of a communication device according to an embodiment of the present application.

Detailed ways

The technical solutions in the present application will be described below with reference to the accompanying drawings.

The embodiments of the present application may be applied to various communication systems, such as a wireless local area network (WLAN), a narrowband Internet of things (NB-IoT), a global system for mobile communications (global system for mobile communications, GSM), enhanced data rate for GSM evolution (enhanced data rate for gsmevolution, EDGE), wideband code division multiple access (WCDMA), code division multiple access 2000 system (code division multiple access) , CDMA2000), time division-synchronization code division multiple access system (time division-synchronization code division multiple access, TD-SCDMA), long term evolution system (long term evolution, LTE), satellite communication, fifth generation (5th generation, 5G) system Or new communication systems that will appear in the future.

The terminal devices involved in the embodiments of the present application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem. The terminal can be a mobile station (mobile station, MS), a subscriber unit (subscriber unit), user equipment (user equipment, UE), a cellular phone (cellular phone), a smart phone (smart phone), a wireless data card, a personal digital assistant ( personal digital assistant, PDA) computer, tablet computer, wireless modem (modem), handheld device (handset), laptop computer (laptop computer), machine type communication (machine type communication, MTC) terminal, etc.

"Deterministic delay" means that the delay and jitter experienced by the packet transmission meet the upper bound on the premise that the packet obeys certain burst requirements. To meet the end-to-end deterministic delay and jitter of packets, it is necessary to implement deterministic packet scheduling on the data plane that is scalable (suitable for large networks).

In the traditional Internet Protocol (IP) network, due to the existence of burst accumulation, it cannot provide deterministic end-to-end delay and jitter for a flow. Burst accumulation exists in traditional IP networks, and burst accumulation is the root cause of delay uncertainty. The reason for the accumulation of bursts is the squeezing of different packets. As shown in Figure 1, a schematic diagram of the formation process of burst accumulation is shown. In Figure 1, when three different data streams arrive at node A at the same time, they are completely uniform. Since the device can only process packets at line speed, one of the streams is affected by the other The squeezing of the two streams causes two consecutive packets of one of the streams to be next to each other, and the burst degree increases. After several cycles of the above process, a flow will form an unpredictable large burst, and the large burst will further squeeze other flows, causing the delay of other flows to increase, and it is difficult to predict.

In the existing technical solution, for example, a weighted fair queue (WFQ) allocates weights in equal proportions to the reserved bandwidth of each flow, and performs shaping based on system virtual time and weights. Timestamp-based persistent scheduling algorithm. These algorithms all use a similar "sorted priority queue" mechanism. This mechanism calculates a time stamp for each arriving packet according to the system state, and uses this time stamp as a metric for the priority order of packet scheduling. However, a flow-by-flow queue needs to be maintained, the maintenance of virtual time is complex, and the scalability is poor.

As shown in Figure 2, a schematic diagram of the scheduling process of cyclic queuing and forwarding (CQF) is shown. The network node performs shaping and scheduling with T as a period, and the periodic traffic bi=ri*T, where ri is the bandwidth required by the data flow i. In CQF, the packets sent by node A in cycle x are received in cycle x of next hop node B, and sent in cycle x+1. For a path of length h, the total delay is hT. The maximum total delay is (h+1)T, the minimum total delay is (h-1)T, and the jitter is 2T. In order to realize this scheme, it is necessary to align the clock edges of nodes in the whole network; and the link delay is included in T, which cannot support long-distance links. The existing technologies to solve the above problems either rely on the time synchronization of the entire network devices, or have limitations on the transmission distance, which are difficult to apply to large-scale IP networks.

At present, a message sending scheme based on a shaper (damper) model is proposed, as shown in Figure 3, which shows a schematic diagram of the basic damper model. Basic working principles include:

1) A damper can be regarded as a shaper on the downstream node, which shapes the traffic sent by the upstream node (active delay);

2) A damper and the queuing system of an outlet of an upstream node together form a pair;

3) The upstream node h calculates the maximum delay that any message may stay in h according to the current access traffic in the network, which is recorded as D ^h ; note that if the upstream node also has a damper module, this D ^h does not include the message The time spent in the damper of h corresponds to the maximum value of p+q in Figure 3;

4) Record the actual stay time of each message in the queue system of node h, corresponding to the actual value of p+q in Figure 3, and carry this information message by message, where p is the processing time of entering the queue system, and is a constant, q is the queuing time in the queuing system;

5) After the downstream node h+1 receives the message, it actively stays in the damper for d=D ^h – (the actual value of p+q), and then releases it to the switch fabric and the queuing system. The release time is called the eligibility time of the message;

6) The calculation of D ^h is based on the existing flow parameters in the network, such as the average flow rate (rate) and the flow burst size (burst), and is calculated using the network calculus theory, each flow will have a certain amount of D ^h . Contribution; network calculus theory guarantees that any message on node h, calculated from the starting point of p, must be sent out within D ^h time;

7) All flows through the same outlet, whether they belong to the same flow or not, use the same D ^h .

The theoretical effect of damper:

Any message stays in a pair for the same time, and a message with a short stay in node h will stay in the damper of node h+1 for a long time, and vice versa; the sum of the two is always equal to D ^h ; any flow After a pair, the output traffic model is the same as the traffic model entering the pair, eliminating burst-by-hop accumulation; end-to-end deterministic delay guarantee.

For any exit of device h, the calculation of D ^h is based on the current flow state of the port. Therefore, when an existing flow in the network leaves, it will result in a new D ^h after leaving (denoted as D ^h new) It is smaller than the original ^Dmax (denoted as D old). Due to the departure of some flows, the actual burstiness of other still-existing flows through the same port is increased compared to that under the damper model. Since D ^h new is calculated by using the original burst degree of the still existing flow, the increased burst degree is larger, resulting in that the packet cannot be sent within the D ^h new time, and the hop-by-hop traffic model of damper remains unchanged. The properties of , no longer hold, so that deterministic latency cannot be guaranteed. On the other hand, due to the change of D ^h , there may be several consecutive packets using D old and D ^h new ^respectively , resulting in the eligibility time of the later arriving packet may be earlier than the first arriving packet, resulting in out of order. .

To this end, an embodiment of the present application proposes a method for sending data, which can solve the above-mentioned problem of uncertain time delay caused by flow departure. Based on the basic model of damper, the present application provides a method of decreasing the gradient of D ^h to solve the problem of uncertain delay caused by flow departure, and at the same time cooperates with a scheme based on eligibility time table (ETT) to solve the problem of out-of-order packets.

As shown in FIG. 4 , a schematic diagram of a system scenario applicable to this application is shown. This application is applicable to IP network environments of any scale, including large-scale operator networks, smaller-scale campus networks, and the like. The deterministic delay of the packet from the sender node to the core node through the edge node, and then from the edge node to the peer node.

The above effects of this application have the following preset conditions:

(1) Assuming that the path is determined, the bandwidth ri is reserved for flow i on each interface of the path, where: flow i is data flow i, and ri is the amount of bandwidth required by data flow i;

(2) The traffic sent by the end-side conforms to: Ai(t)=rit+Bi, where Ai(t) is the total data flow of data stream i in time t, rit is the average bandwidth, and Bi is the burst of data stream i flow;

(3) For the sending traffic that does not meet the above model, the edge node will shape the flow-by-flow leaky bucket, so that the traffic entering the network meets the above model.

As shown in FIG. 5 , a schematic flowchart of a data sending method proposed by an embodiment of the present application is shown.

Before time t, the first device is used to transmit the first data stream and at least one second data stream. In this case, the first device determines that the first data stream is in the first device according to the instruction information sent by the controller or through calculation. The sum of the time spent in the queue system and the time delayed in the second device T ₁ , T ₁ is the deterministic delay of the first data stream in the first device, and the first device makes the first data stream in the first device. After the data stays in the first device for a certain period of time, the data in the first data stream is sent to the second device, and the data sent to the second device carries the actual stay time of the data in the queue system of the first device a and T ₁ , after receiving the data in the first data stream sent by the first device, the second device reshapes the data in the damper of the second device, and releases the data after actively staying in the damper for T ₁ -a , so that the data enters the queue system of the second device. The first device is an upstream device of the second device, and the second device is a downstream device of the first device.

At time t, when the second data stream leaves, the controller (control plane) can determine a new deterministic delay T for the first data stream to be transmitted through the first device to the second device after the second data stream leaves, that is, T is The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device determined after the second data stream leaves, the controller can also calculate the time between T and T ₁ Delay reduction amount ΔT; the controller may send first signaling to the first device, where the first signaling is used to instruct one or more second data streams to leave, and the first signaling may include T and T ₁ , it can also only include ΔT, and can also include T, T ₁ and ΔT at the same time, which is not limited in this application. Optionally, the first device may also calculate a new deterministic delay T for the first data stream by itself. It should be understood that the flow leaving means that resources are no longer reserved for the flow, usually the contract between the user and the service provider (internet server provider, ISP) expires, and the time must be known; the contract has not expired but the user does not send traffic Don't call the flow away. The size of ΔT can be calculated according to the network calculus theory, and the application does not care about the specific determination process. Optionally, the data packet sent by the ingress network device to the first device may also carry the first signaling.

510. At time t, the first device receives first signaling, where the first signaling is used to instruct one or more second data streams to leave, and the first signaling may include a first delay for the first data stream T ₁ , the second delay T, the delay adjustment step θ and the adjustment time interval τ. Optionally, the first signaling may also include only the difference ΔT between T and T ₁ , or the first signaling may include T, T ₁ and ΔT at the same time. Among them, T is the determined shortest delay for the first data stream, in other words, T is the minimum value of the sum of the time that the data in the first data stream stays in the first device and the time that is delayed in the second device ; θ is the adjustment step size of multiple adjustment delays, which can prevent the excessive adjustment of the adjacent two delays from increasing the burst degree. The size of θ should ensure that the impact on the arrival curve is reduced to the clock error. level, guaranteed to have no impact on performance.

It should be understood that after the second data stream leaves, the controller may send a stream leaving signaling to all devices that the first data stream passes through, and the signaling simultaneously notifies the adjustment parameters of the relevant devices.

520. During the period from t to t+x, the first device sends first data to the second device, where the first data includes first indication information, and the first indication information includes instructions for indicating that the first data is in the first data. The sum T1 of the time spent in the queue system of _one device and the time delayed in the second device and the time that the first data actually stayed in the queue system of the first device, wherein the first data is the first The data in the data stream, x is a non-negative number, and x can be equal to T ₁ . T ₁ is the deterministic delay of the first data. It should be understood that the time when the first device sends data to the second device is the time when the data enters the queue system of the first device.

530. The second device receives the first data sent by the first device to the second device within the period from t to t+x.

540. The second device determines the first moment when the first data is delayed in the second device and ends according to T1 included in the _first data and the time that the first data actually stays in the queue system of the first device. For example, if the second device receives the first data sent by the first device at time t ₁ , and the time that the first data actually stays in the queue system of the first device is a ₁ , the first time is t ₁ +a ₁ .

550. The second device releases the first data at the first moment, so that the first data enters the queue system of the second device.

During the period from t+x to t+x+τ, the first device sends second data to the second device, where the second data includes second indication information, where the second indication information includes instructions for indicating that the second data is in the first The sum of the time spent in the queue system of the device and the time delayed in the second device T ₂ and the time that the second data actually stayed in the queue system of the first device, where T ₂ =T ₁ − θ, the second data is the data in the first data stream. The second device receives the second data sent by the first device within a period of t+x to t+x+τ. The second device determines, according to T ₂ and the time that the second data actually stays in the queue system of the first device, the second moment when the second data is delayed in the second device and ends. The second device releases the second data at the second moment, so that the second data enters the queue system of the second device.

Specifically, optionally, after the second device determines the first moment when the first data is delayed in the second device, the second device enables the second qualified timetable ETT maintained by the second device, so that The second ETT records the specific time of the first moment. After the second data flow leaves, the controller will send flow leaving signaling to all the devices that the first data flow passes through, that is, the controller will also send a signal to the second device to instruct the second data flow to leave at time t. command, the second device may also immediately enable the second ETT maintained by the second device after receiving the signaling, so that the second ETT records the specific moment at which the data in the first data stream is released.

After the second device determines the second time when the second data is delayed in the second device according to the second data sent by the first device, the second device determines the morning and evening of the first time and the second time; The second time is later than the first time, the second device enables the second ETT table maintained by the second device to update the recorded first time to the second time, and releases the second data at the second time; if the second time Earlier than the first moment, the second device releases the second data at the first moment, thereby preventing disorder.

560. During the period from t+x+(N-2)τ to t+x+(N-1)τ, the first device sends the Nth data to the second device, the Nth data includes the Nth indication information, the Nth data The indication information includes the sum T _N for indicating that the Nth data stays in the queue system of the first device and the time delayed in the damper of the second device, and the Nth data is in the queue system of the first device. The actual stay time, where T _N =T ₁ -(N-1)θ, the Nth data is the data in the first data stream, where N is an integer greater than 1, and T _N is greater than or equal to T. Wherein, T _N is adjusted with a step size of θ and a time interval of τ. It is necessary to ensure that the impact of the delay of the first data stream flowing through the first device on the increase of the burst degree of other devices is reduced to the clock error level.

570. The second device receives the Nth data sent by the first device in the period from t+x+(N-2)τ to t+x+(N-1)τ.

580. The second device determines, according to T _N and the time that the Nth data actually stays in the queue system of the first device, the Nth time when the Nth data is delayed in the second device and ends.

590. The second device releases the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device.

Specifically, optionally, after the second device determines the N-1th time when the N-1th data is delayed in the second device, the second device enables the second qualified timetable ETT to record the Nth -1 time; if the Nth time is later than the N-1th time, the second device enables the second ETT table to update the recorded N-1th time to the Nth time, and releases the Nth data at the Nth time ; If the Nth time is earlier than the N-1th time, the second device releases the Nth data at the N-1th time, and does not enable the N-1th time of the second ETT table to update the record; thus, disorder can be prevented.

Optionally, at time t, the second device receives the first signaling sent by the controller, where the first signaling is used to instruct the second data stream to leave; the second device enables the second qualifying time according to the first signaling The table ETT enables the second ETT to update the qualified time of the first data stream sent by the first device, and records the latest time when the data in the first data stream is released.

Optionally, after the first device receives the first signaling sent by the controller, it enables the first qualified timetable ETT maintained by the first device, and the first ETT is used to update the first data stream sent by the third device. The qualified time is updated, wherein the third device is an upstream device of the first device. It should be understood that the first device, the second device and the third device may be ingress gateway devices, routers and the like.

In the technical solution provided by the embodiment of the present application, if the second data stream leaves, the time delay of the first data stream flowing through the first device is determined by the gradient decreasing method, so as to ensure that the reduction of the time delay causes bursts of other devices The effect of increasing degrees is reduced to the clock error level, thus ensuring the determinism of the delay.

The embodiment of the present application proposes another method for sending data, including:

At time t, the first device receives the first signaling, the first signaling is used to instruct the second data stream to join, and the first signaling includes the second delay difference value ΔT ₂ or the first data stream for the first data stream. Time delay T ₁ and second time delay T ₂ , time delay adjustment step θ and adjustment time interval τ, wherein ΔT ₂ =T ₂ −T ₁ , and T ₁ is the first data determined before the second data stream is added The sum of the time that the flow stays in the queue system of the first device and the time that it is delayed in the second device, T ₂ is the first data flow determined after the second data flow joins in the queue system of the first device. The sum of the time and the time delayed in the second device, the second device is the device that receives the data stream sent by the first device;

During the period from t _x to t _x +N*τ, the first device sends the Nth data to the second device, where the Nth data includes the Nth indication information, and the Nth indication information The sum of the time spent in the queue system of one device and the time delayed in the second device, T _N and the time that the Nth data actually stayed in the queue system of the first device, where t _x is time t or time t At a later time, T _N =T ₁ +N*θ, the Nth data is the data in the first data stream, N is an integer greater than 0, and T _N is less than or equal to T ₂ ;

The second device receives the Nth data sent by the first device within the time period from _tx to _tx +N*τ, where the Nth data is data in the first data stream, and T _N is less than or equal to T ₂ ;

The second device determines the Nth time when the Nth data is delayed in the second device and ends according to T _N and the time that the Nth data actually stays in the queue system of the first device;

The second device releases the Nth data at the Nth time, so that the Nth data enters the queue system of the second device.

In the technical solution provided by the embodiment of the present application, if the second data stream is added, the time delay of the first data stream flowing through the first device is determined by a gradient increment method, so as to reduce jitter.

An embodiment of the present application provides a communication apparatus. As shown in FIG. 6 , a schematic block diagram of a communication apparatus 600 provided by an embodiment of the present application is shown. The communication apparatus 600 may be a component in the first device implementing the method embodiment of FIG. 5 , such as a chip. The communication device 600 includes:

The transceiver unit 610 is configured to receive a first signaling at time t, where the first signaling is used to instruct the second data stream to leave, and the first signaling includes a first time delay T ₁ for the first data stream , the second delay T, the delay adjustment step θ and the adjustment time interval τ, where T ₁ is the first data stream determined before the second data stream leaves the queue system of the first device to stay The sum of the time and the time delayed in the second device, T is the time that the first data stream stays in the queue system of the first device determined after the second data stream leaves and the time that the first data stream stays in the queue system of the first device The sum of the delayed time in the second device, the second device is a device that receives the data stream sent by the first device;

The transceiver unit 610 is further configured to send first data to the second device within a period from t to t+x, where the first data includes first indication information, and the first indication information includes T ₁ and the time that the first data actually stays in the queue system of the first device, the first data is the data in the first data stream, and x is a non-negative number;

The transceiver unit 610 is further configured to send the Nth data to the second device within the period from t+x+(N-2)τ to t+x+(N-1)τ, where the Nth data includes: Nth indication information, where the Nth indication information includes the sum of the time that the Nth data stays in the queue system of the first device and the time delayed in the second device, T _N sum The actual stay time of the Nth data in the queue system of the first device, where T _N =T ₁ -(N-1)θ, and the Nth data is the data in the first data stream , N is an integer greater than 1, and T _N is greater than or equal to T.

Optionally, the communication apparatus further includes a processing unit 620, the processing unit 620 is configured to enable a first qualified timetable ETT, and the first ETT is used for the first data stream sent by the third device The qualifying time is updated.

Optionally, the first signaling is sent by the controller.

An embodiment of the present application provides another communication apparatus. As shown in FIG. 7 , a schematic block diagram of a network communication apparatus 700 provided by an embodiment of the present application is shown. The communication apparatus 700 may be a component in the second device implementing the method embodiment of FIG. 5 , such as a chip. The communication device 700 includes:

A transceiver unit 710, configured to receive first data sent by a first device in a period from t to t+x, where the first data includes first indication information, and the first indication information includes T1 and the _first indication The actual stay time of data in the queue system of the first device, where T ₁ is the difference between the time the first data stream stays in the queue system of the first device determined before the second data stream leaves The sum of the delayed times in the two devices, the first data is the data in the first data stream, and x is a non-negative number;

The processing unit 720 is configured to determine, according to T1 and the time that the _first data actually stays in the queue system of the first device, the first time when the first data is delayed in the second device and ends time;

The processing unit is further configured to release the first data at the first moment, so that the first data enters the queue system of the second device;

The transceiver unit 710 is further configured to receive the Nth data sent by the first device within the period from t+x+(N-2)τ to t+x+(N-1)τ, where the Nth data includes Nth indication information, where the Nth indication information includes the sum of the time that the Nth data stays in the queue system of the first device and the time delayed in the second device, T _N sum The actual stay time of the Nth data in the queue system of the first device, where T _N =T1-(N-1)θ, θ is the delay adjustment step size, τ is the adjustment time interval, and N is An integer greater than 1, the Nth data is the data in the first data stream, T _N is greater than or equal to T, and T is the first data stream determined after the second data stream leaves the data in the The sum of the time spent in the queue system of the first device and the time delayed in the second device;

The processing unit 720 is further configured to determine, according to T _N and the time that the Nth data actually stays in the queue system of the first device, when the Nth data is delayed in the second device and ends The Nth moment of ;

The processing unit 720 is further configured to release the Nth data according to the Nth moment, so that the Nth data enters the queue system of the second device.

Optionally, the processing unit 720 is further configured to enable the second qualified timetable ETT, so that the second ETT records the N-1th time, where the N-1th time is the N-1th data the time when the shaping ends in the second device;

The processing unit 720 is specifically used for:

If the Nth time is later than the N-1th time, enable the second ETT table to update the recorded N-1th time to the Nth time, and release it at the Nth time the Nth data;

If the Nth time is earlier than the N-1th time, the Nth data is released at the N-1th time.

Optionally, the transceiver unit 710 is further configured to receive the first signaling sent by the controller at time t, where the first signaling is used to instruct the second data stream to leave;

The processing unit 720 is further configured to, according to the first signaling, enable a second qualifying timetable ETT, where the second ETT is used for the qualifying time of the first data stream sent by the first device to update.

The embodiment of the present application provides another communication device, and the communication device includes:

a transceiver unit, configured to receive a first signaling at time t, where the first signaling is used to instruct the second data stream to join, and the first signaling includes a second delay difference value ΔT for the first data stream ₂ or the first delay T ₁ and the second delay T ₂ , the delay adjustment step θ and the adjustment time interval τ, where ΔT ₂ =T ₂ −T ₁ , and T ₁ is added to the second data stream The sum of the previously determined time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device, T ₂ is the determined time after the second data stream is added. The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device, where the second device receives the data stream sent by the first device. equipment;

The transceiver unit is further configured to send the Nth data to the second device within the period from t _x to t _x +N*τ, where the Nth data includes the Nth indication information, and the Nth indication information Including the sum T _N for indicating the time that the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the first device. _The _actual stay time in the _queue system of the is an integer greater than 0, and T _N is less than or equal to T ₂ .

a transceiver unit, configured to receive first data sent by a first device within a period from t to t+T ₁ , the first data includes first indication information, and the first indication information includes T ₁ and the first The actual stay time of the data in the queue system of the first device, where T1 is the time between the stay time of the _first data stream in the queue system of the first device determined before the second data stream is added and the time in the queue system of the first device. the sum of the delayed times in the second device, and the first data is the data in the first data stream;

The transceiver unit is further configured to receive the Nth data sent by the first device in the period from t _x to _tx +N*τ, where the Nth data includes the Nth indication information, and the Nth indication information Including the sum T _N for indicating the time that the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the first device. The actual stay time in the queue system of , where t _x is time t or the time after time t, T _N =T1+N*θ, θ is the delay adjustment step size, τ is the adjustment time interval, and N is greater than 0 The Nth data is the data in the first data stream, T _N is less than or equal to T ₂ , and T ₂ is the first data stream determined after the second data stream is added in the The sum of the time spent in the queue system of the first device and the time delayed in the second device;

The processing unit is further configured to, according to T _N and the time that the Nth data actually stays in the queue system of the first device, determine the time when the Nth data is delayed in the second device and ends. Nth moment;

The processing unit is further configured to release the Nth data at the Nth time, so that the Nth data enters the queue system of the second device.

An embodiment of the present application provides a communication device 800. As shown in FIG. 8, a schematic block diagram of a communication device 800 according to an embodiment of the present application is shown.

The device 800 includes: a processor 810 and a transceiver 820, the transceiver 820 is configured to receive computer codes or instructions and transmit them to the processor 810, and the processor 810 executes the computer codes or instructions, as described herein. A method in any possible implementation manner in the application embodiments.

The above-mentioned processor 810 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), an off-the-shelf programmable gate array (field programmable gate array, FPGA), or other possible solutions. Programming logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

The embodiments of the present application further provide a computer-readable storage medium, on which a computer program for implementing the methods in the foregoing method embodiments is stored. When the computer program runs on a computer, the computer can implement the methods in the above method embodiments.

In addition, the term "and/or" in this application is only an association relationship to describe associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean that A exists alone, and A and B exist at the same time. , there are three cases of B alone. In addition, the character "/" in this document generally indicates that the contextual object is an "or" relationship; the term "" in this application can indicate "one" and "two or more", for example, A, B In and C, it can be expressed that A exists alone, B exists alone, C exists alone, A and B exist simultaneously, A and C exist simultaneously, C and B exist simultaneously, and A and B and C exist simultaneously, these seven situations.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may use different methods for implementing the described functionality for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, for the specific working process of the above-described systems, devices and units, reference may be made to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, removable hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

A method for data transmission, comprising:

At time t, the first device receives first signaling, where the first signaling is used to instruct the second data stream to leave, and the first signaling includes the first delay difference value ΔT1 for the first data stream or The first delay T1 and the second delay T, the delay adjustment step θ and the adjustment time interval τ, wherein ΔT 1 =T 1 −T, T 1 is the The sum of the time that the first data flow stays in the queue system of the first device and the time that it is delayed in the second device, T is the time at which the first data flow is determined after the second data flow leaves The sum of the time spent in the queue system of the first device and the time delayed in the second device, where the second device is a device that receives the data stream sent by the first device;

During the period from t to t+x, the first device sends first data to the second device, where the first data includes first indication information, and the first indication information includes T1 and the first indication The time that a piece of data actually stays in the queue system of the first device, the first data is the data in the first data stream, and x is a non-negative number;

During the period from t+x+(N-2)τ to t+x+(N-1)τ, the first device sends the Nth data to the second device, where the Nth data includes the Nth indication information , the Nth indication information includes the sum T N for indicating the time the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data The time that data actually stays in the queue system of the first device, where T N =T 1 -(N-1)θ, the Nth data is the data in the first data stream, and N is greater than An integer of 1, T N is greater than or equal to T.
The method according to claim 1, wherein after the first device receives the first signaling, the method further comprises:

The first device enables a first qualifying timetable ETT, where the first ETT is used to update the qualifying time of the first data stream sent by the third device.
The method according to claim 1 or 2, wherein the first signaling is sent by a controller.
A method for data transmission, comprising:

The second device receives the first data sent by the first device in the period from t to t+x, the first data includes first indication information, and the first indication information includes T1 and where the first data is located The actual stay time in the queue system of the first device, where T 1 is the time between the time the first data stream stays in the queue system of the first device determined before the second data stream leaves and the time it stays in the second data stream. The sum of the delayed time in the device, the first data is the data in the first data stream, and x is a non-negative number;

The second device determines, according to T1 and the time that the first data actually stays in the queue system of the first device, the first moment when the first data is delayed in the second device and ends ;

The second device releases the first data at the first moment, so that the first data enters the queue system of the second device;

The second device receives the Nth data sent by the first device in the period from t+x+(N-2)τ to t+x+(N-1)τ, where the Nth data includes the Nth indication information , the Nth indication information includes the sum T N for indicating the time the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data The time that the data actually stays in the queue system of the first device, where T N =T1-(N-1)θ, θ is the delay adjustment step size, τ is the adjustment time interval, and N is an integer greater than 1 , the Nth data is the data in the first data stream, T N is greater than or equal to T, and T is the first data stream determined after the second data stream leaves the data in the first device the sum of the time spent in the queue system and the time delayed in the second device;

The second device determines, according to T N and the time that the Nth data actually stays in the queue system of the first device, the Nth time when the Nth data is delayed in the second device and ends ;

The second device releases the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device.
The method according to claim 4, wherein the method further comprises:

The second device enables the second qualifying schedule ETT, so that the second ETT records the N-1th time, wherein the N-1th time is the N-1th data being stored in the second device. the moment when the shaping ends;

The second device releases the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device, including:

If the Nth time is later than the N-1th time, the second device enables the second ETT table to update the recorded N-1th time to the Nth time. releasing the Nth data at the Nth moment;

If the Nth time is earlier than the N-1th time, the second device releases the Nth data at the N-1th time.
The method according to claim 4, wherein before the second device receives the first data sent by the first device, the method further comprises:

At time t, the second device receives the first signaling sent by the controller, where the first signaling is used to instruct the second data stream to leave;

The second device enables a second qualifying timetable ETT according to the first signaling, where the second ETT is used to update the qualifying time of the first data stream sent by the first device.
A method for data transmission, comprising:

At time t, the first device receives the first signaling, where the first signaling is used to instruct the second data stream to join, and the first signaling includes the second delay difference value ΔT 2 for the first data stream Or the first delay T 1 and the second delay T 2 , the delay adjustment step θ and the adjustment time interval τ, where ΔT 2 =T 2 −T 1 , and T 1 is before the second data stream is added The determined sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device, T 2 is the determined time after the second data stream is added The sum of the time that the first data stream stays in the queue system of the first device and the time that is delayed in the second device, where the second device is a device that receives the data stream sent by the first device ;

During the period from t x to t x +N*τ, the first device sends the Nth data to the second device, where the Nth data includes Nth indication information, and the Nth indication information includes information for Indicates the sum T N of the time the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the queue system of the first device The actual stay time in , where t x is time t or a time after time t, T N =T 1 +N*θ, the Nth data is the data in the first data stream, and N is greater than 0 An integer of T N less than or equal to T 2 .
A method for data transmission, comprising:

The second device receives the first data sent by the first device in the period from t to t+T1, the first data includes first indication information, and the first indication information includes T1 and the first data in The actual stay time in the queue system of the first device, where T 1 is the time between the stay time of the first data stream in the queue system of the first device determined before the second data stream is added and the time in the queue system of the first device. The sum of the delayed times in the two devices, the first data is the data in the first data stream;

The second device receives the Nth data sent by the first device in the period from t x to tx +N*τ, the Nth data includes the Nth indication information, and the Nth indication information includes Indicates the sum T N of the time the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the queue system of the first device The actual stay time in , where t x is time t or time after time t, T N =T 1 +N*θ, θ is the delay adjustment step size, τ is the adjustment time interval, and N is an integer greater than 0 , the Nth data is the data in the first data stream, T N is less than or equal to T 2 , and T 2 is the first data stream determined after the second data stream is added in the first data stream the sum of the time spent in the queue system of the device and the time delayed in the second device;

The second device determines, according to T N and the time that the Nth data actually stays in the queue system of the first device, the Nth time when the Nth data is delayed in the second device and ends ;

The second device releases the Nth data at the Nth time, so that the Nth data enters the queue system of the second device.
A communication device, comprising:

a transceiver unit, configured to receive a first signaling at time t, where the first signaling is used to instruct the second data stream to leave, and the first signaling includes a first delay difference value ΔT for the first data stream 1 or the first time delay T 1 and the second time delay T, the time delay adjustment step θ and the adjustment time interval τ, where T 1 is the first data stream determined before the second data stream leaves The sum of the time spent in the queue system of the first device and the time delayed in the second device, T is the queue of the first data stream in the first device determined after the second data stream leaves The sum of the time spent in the system and the time delayed in the second device, where the second device is a device that receives the data stream sent by the first device;

The transceiver unit is further configured to send first data to the second device within a period from t to t+x, where the first data includes first indication information, and the first indication information includes T 1 and The time that the first data actually stays in the queue system of the first device, the first data is the data in the first data stream, and x is a non-negative number;

The transceiver unit is further configured to, within a period from t+x+(N-2)τ to t+x+(N-1)τ, send the Nth data to the second device, where the Nth data includes the N indication information, where the N th indication information includes the sum of the time T N and all the time that the N th data stays in the queue system of the first device and the time delayed in the second device. the actual stay time of the Nth data in the queue system of the first device, wherein T N =T 1 -(N-1)θ, the Nth data is the data in the first data stream, N is an integer greater than 1, and T N is greater than or equal to T.
The communication apparatus according to claim 9, characterized in that the communication apparatus further comprises a processing unit, the processing unit is configured to enable a first qualified schedule ETT, the first ETT is used for the third device The qualified time of the sent first data stream is updated.
The communication device according to claim 9 or 10, wherein the first signaling is sent by a controller.
A communication device, characterized in that it includes:

A transceiver unit, configured to receive first data sent by a first device in a period from t to t+x, where the first data includes first indication information, and the first indication information includes T1 and the first data The actual stay time in the queue system of the first device, where T 1 is the difference between the time the first data stream stays in the queue system of the first device determined before the second data stream leaves The sum of the delayed time in the device, the first data is the data in the first data stream, and x is a non-negative number;

A processing unit, configured to determine a first moment when the first data is delayed in the second device and ends according to T 1 and the time that the first data actually stays in the queue system of the first device ;

The processing unit is further configured to release the first data at the first moment, so that the first data enters the queue system of the second device;

The transceiver unit is further configured to receive the Nth data sent by the first device in the period from t+x+(N-2)τ to t+x+(N-1)τ, where the Nth data includes the th N indication information, where the N th indication information includes the sum of the time T N and all the time that the N th data stays in the queue system of the first device and the time delayed in the second device. The actual stay time of the Nth data in the queue system of the first device, wherein T N =T 1 -(N-1)θ, θ is the delay adjustment step size, τ is the adjustment time interval, and N is An integer greater than 1, the Nth data is the data in the first data stream, T N is greater than or equal to T, and T is the first data stream determined after the second data stream leaves the data in the The sum of the time spent in the queue system of the first device and the time delayed in the second device;

The processing unit is further configured to, according to T N and the time that the Nth data actually stays in the queue system of the first device, determine the time when the Nth data is delayed in the second device and ends. Nth moment;

The processing unit is further configured to release the Nth data according to the Nth time, so that the Nth data enters the queue system of the second device.
The communication device according to claim 12, wherein:

The processing unit is further configured to enable the second qualified timetable ETT, so that the second ETT records the N-1th time, wherein the N-1th time is the time when the N-1th data is in the second time. The moment in the device when the shaping ends;

The processing unit is specifically used for:

If the Nth time is later than the N-1th time, enable the second ETT table to update the recorded N-1th time to the Nth time, and release it at the Nth time the Nth data;

If the Nth time is earlier than the N-1th time, the Nth data is released at the N-1th time.
The communication device according to claim 12, wherein:

The transceiver unit is further configured to receive, at time t, a first signaling sent by a controller, where the first signaling is used to instruct the second data stream to leave;

The processing unit is further configured to, according to the first signaling, enable a second qualifying timetable ETT, where the second ETT is used to perform the qualifying time on the first data stream sent by the first device. renew.
A communication device, comprising:

a transceiver unit, configured to receive a first signaling at time t, where the first signaling is used to instruct the second data stream to join, and the first signaling includes a second delay difference value ΔT for the first data stream 2 or the first delay T 1 and the second delay T 2 , the delay adjustment step θ and the adjustment time interval τ, where ΔT 2 =T 2 −T 1 , and T 1 is added to the second data stream The sum of the previously determined time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device, T 2 is the determined time after the second data stream is added. The sum of the time that the first data stream stays in the queue system of the first device and the time that it is delayed in the second device, where the second device receives the data stream sent by the first device. equipment;

The transceiver unit is further configured to send the Nth data to the second device within the period from t x to t x +N*τ, where the Nth data includes the Nth indication information, and the Nth indication information Including the sum T N for indicating the time that the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the first device. The actual stay time in the queue system of the is an integer greater than 0, and T N is less than or equal to T 2 .
A communication device, comprising:

a transceiver unit, configured to receive first data sent by a first device within a period from t to t+T 1 , the first data includes first indication information, and the first indication information includes T 1 and the first The actual stay time of the data in the queue system of the first device, where T1 is the time between the stay time of the first data stream in the queue system of the first device determined before the second data stream is added and the time in the queue system of the first device. the sum of the delayed times in the second device, and the first data is the data in the first data stream;

The transceiver unit is further configured to receive the Nth data sent by the first device in the period from t x to tx +N*τ, where the Nth data includes the Nth indication information, and the Nth indication information Including the sum T N for indicating the time that the Nth data stays in the queue system of the first device and the time delayed in the second device and the Nth data in the first device. The actual stay time in the queue system of the An integer of 0, the Nth data is the data in the first data stream, T N is less than or equal to T 2 , and T 2 is the location where the first data stream is determined after the second data stream is added. the sum of the time spent in the queue system of the first device and the time delayed in the second device;

The processing unit is further configured to, according to T N and the time that the Nth data actually stays in the queue system of the first device, determine the time when the Nth data is delayed in the second device and ends. Nth moment;

The processing unit is further configured to release the Nth data at the Nth time, so that the Nth data enters the queue system of the second device.
A communication device, characterized by comprising: a processor and a transceiver, the transceiver is used to receive computer codes or instructions and transmit them to the processor, and the processor executes the computer codes or instructions, as claimed in claim The method of any one of claims 1 to 8.
A computer-readable storage medium, comprising:

The computer-readable medium stores a computer program;

The computer program, when run on a computer, causes the computer to perform the method of any one of claims 1 to 8.