CN116319459A

CN116319459A - Time delay detection method and related equipment

Info

Publication number: CN116319459A
Application number: CN202310325381.XA
Authority: CN
Inventors: 朱小平
Original assignee: Shenzhen Huawei Cloud Computing Technology Co ltd
Current assignee: Shenzhen Huawei Cloud Computing Technology Co ltd
Priority date: 2023-03-22
Filing date: 2023-03-22
Publication date: 2023-06-23

Abstract

The embodiment of the application discloses a time delay detection method and related equipment, which are used for detecting time delay between two communication equipment. In the application, a first sending timestamp and a first receiving timestamp are obtained first, then a first response timestamp and a second receiving timestamp are obtained, wherein the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when the gateway receives the first message, the first message is a message sent by a first device to a second device, the first response timestamp is a timestamp carried in the first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device. Then, instead of bi-directional delayed RTTs, a unidirectional first delay from the first device to the second device may be calculated based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp.

Description

Time delay detection method and related equipment

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a delay detection method and related devices.

Background

When a user device needs to use a cloud service, it is generally required to reach the cloud network through an operator network, and access a server in the cloud network, so that the cloud service can be used. However, the operator network is very complex and the delay is not controllable. For example, the user equipment 1 accesses the server 1 deployed in the cloud network through the operator network, there are a plurality of alternative paths, and the time delays of different paths may be different. In order to improve user experience, a path with the smallest time delay needs to be selected, and time delays of different paths need to be measured.

Currently, a detection host can be deployed in a server in a cloud network to detect a delay. A common detection method is to use ping, that is, a detection host in a cloud network sends a detection message to a user equipment, where the detection message may be a control message protocol (internet control message protocol, ICMP) message. The probing host then receives the response message returned by the user equipment, and the probing host may calculate a round-trip time (RTT) between the server and the user equipment based on the timestamp in the response message and the timestamp of the sending probe message.

However, the above probing method can only obtain RTT from the server to the ue and then return to the server from the ue, and cannot obtain delay in a single direction from the server to the ue or from the ue to the server.

Disclosure of Invention

The embodiment of the application provides a time delay detection method and related equipment, which are used for detecting time delay between two communication equipment.

The first aspect of the application provides a time delay detection method. In the application, a first sending timestamp and a first receiving timestamp are obtained first, then a first response timestamp and a second receiving timestamp are obtained, wherein the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when the gateway receives the first message, the first message is a message sent by a first device to a second device, the first response timestamp is a timestamp carried in the first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device. Then, the first delay from the first device to the second device may be calculated based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp, thereby accurately obtaining the single directional delay of the first device to the second device, rather than the bi-directional delay RTT.

In some possible implementations, the first transmission timestamp and the first reception timestamp may be obtained by receiving the first message, and obtaining a first transmission timestamp in the first message, and recording a point in time when the first message is received.

In some possible implementations, the first response time stamp and the second reception time stamp may be obtained by receiving the first response message, obtaining a first response time stamp in the first response message, and recording a time point when the first response message is received as the second reception time stamp.

In some possible implementations, the first transmit timestamp and the first receive timestamp may be transmitted by the receiving gateway; thereby obtaining a first transmission time stamp and a first reception time stamp. Further, the first response time stamp and the second reception time stamp may be acquired by receiving the first response time stamp and the second reception time stamp transmitted by the gateway.

In some possible implementations, the first delay is equal to a first device-to-gateway delay lat1 plus a gateway-to-second device delay lat2, where lat1=first receive timestamp-first transmit timestamp, lat2=first response timestamp-first receive timestamp- (second receive timestamp-first response timestamp), and the first delay is calculated.

In some possible implementations, the first transmit timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp are all real times on the order of microseconds, and thus may accurately represent the first time delay.

In some possible implementations, the second response time stamp may be obtained and the third receiving time stamp may be obtained, where the second response time stamp is a time stamp carried in the second response message and the third receiving time stamp is a time stamp when the gateway received the second response message, and the second response message is a message sent by the first device to the second device. Then, the second delay from the second device to the first device may be calculated based on the first response time stamp, the second reception time stamp, the second response time stamp, and the third reception time stamp, thereby accurately obtaining the RTT of the single direction delay of the second device to the first device, instead of the bi-directional delay.

In some possible implementations, the second response time stamp and the third reception time stamp may be obtained by receiving the second response message, and obtaining a second response time stamp in the second response message, and recording a time point when the second response message is received as the third reception time stamp.

In some possible implementations, the second response time stamp and the third reception time stamp may be obtained by receiving the second response time stamp and the third reception time stamp sent by the gateway.

In some possible implementations, the second delay is equal to the second device-to-gateway delay lat3 plus the gateway-to-first device delay lat4, where lat3=second receive timestamp-first response timestamp, lat4=third receive timestamp-second receive timestamp- (first receive timestamp-first transmit timestamp), thereby calculating the second delay.

In some possible implementations, the second response time stamp and the third reception time stamp are real times on the order of microseconds, so the second delay can be accurately represented.

In some possible implementations, the second device is a user device, the gateway is an access point in the cloud network, and the gateway and the second device communicate through the operator network, so that the time delay from the user device to the cloud network through the operator network can be calculated.

In some possible implementations, the first device is a server in the cloud network, and the first device and the gateway communicate through a cloud backbone network in the cloud network, so that the time delay from the first device in the cloud network to the operator network through the cloud backbone network communication can be calculated.

A second aspect of the present application provides a latency calculating device for performing the method of any of the preceding first aspects.

A third aspect of the present application provides a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the method of any of the first or second or third aspects described above.

A fourth aspect of the present application provides a computer program product comprising computer-executable instructions stored in a computer-readable storage medium; the at least one processor of the apparatus may read the computer-executable instructions from a computer-readable storage medium, the at least one processor executing the computer-executable instructions causing the apparatus to implement the method provided by the first aspect or any one of the possible implementations of the first aspect.

A fifth aspect of the present application provides a communication device that may include at least one processor, a memory, and a communication interface. At least one processor is coupled with the memory and the communication interface. The memory is for storing instructions, the at least one processor is for executing the instructions, and the communication interface is for communicating with other communication devices under control of the at least one processor. The instructions, when executed by at least one processor, cause the at least one processor to perform the method of the first aspect or any possible implementation of the first aspect.

A sixth aspect of the present application provides a chip system comprising a processor for supporting the implementation of the functions referred to in the first aspect or any one of the possible implementations of the first aspect.

In one possible design, the chip system may further include memory to hold the necessary program instructions and data. The chip system can be composed of chips, and can also comprise chips and other discrete devices.

The technical effects of the second to sixth aspects or any one of the possible implementation manners may be referred to the technical effects of the first aspect or the technical effects of the different possible implementation manners of the first aspect, which are not described herein.

Drawings

Fig. 1 is a schematic diagram of a composition structure of a communication system according to an embodiment of the present application;

fig. 2-1 is a flow chart of a time delay detection method according to an embodiment of the present application;

fig. 2-2 is a schematic diagram of field TCP timestamp option in the present application;

fig. 3 is a flow chart of a time delay detection method according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a delay computation device according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The embodiment of the application provides a time delay detection method and related equipment, which are used for detecting time delay between a server and user equipment.

Embodiments of the present application are described below with reference to the accompanying drawings.

The terms first, second and the like in the description and in the claims of the present application and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances and are merely illustrative of the manner in which the embodiments of the application described herein have been described for objects of the same nature. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application. The present embodiment provides a communication system 100, including a cloud network 110, an operator network 120, and a plurality of user devices 130.

The cloud network 110 is configured to provide cloud services for a plurality of user devices 130 (e.g., user device 1, user device 2, user device 3). Cloud services are an increasing, usage and interaction model of internet-based related services, generally involving providing dynamically extensible and often virtualized resources over the internet. Cloud network 110 may provide cloud services to users in an on-demand, scalable manner. Cloud services may be information technology (information technology, IT), software, internet related, or other services. Such as computing power, may also be circulated as a cloud service over the internet.

In some possible implementations, cloud network 110 includes multiple servers (e.g., server 1, server 2, and server 3), a cloud backbone, and multiple (points-of-presence, pops) (e.g., poP1, poP2, poP 3).

The server may be an independent physical server, a server cluster or a distributed system formed by a plurality of physical servers, or a cloud server providing cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, basic cloud computing services such as big data and an artificial intelligent platform. In the embodiment of the application, the plurality of servers are used for providing cloud services to the plurality of user devices through the cloud backbone network.

In an embodiment of the present application, the cloud backbone may include a plurality of switches/routers for connecting a plurality of cloud area servers and a plurality of pops. The switch/router is used for reading the destination address in the message and determining how to transmit the special intelligent network device of the message according to the destination address; the switch/router can understand different protocols, such as an ethernet protocol used by a local area network, a transmission control protocol/interconnection protocol (Transmission Control Protocol/Internet Protocol, TCP/IP) protocol used by the internet, etc., so that the switch/router can analyze destination addresses of messages transmitted from various different types of networks, and convert non-TCP/IP addresses into TCP/IP addresses, or vice versa; the router then transmits each message to the destination address according to the optimal transmission path according to the routing algorithm, so that the router can connect the non-TCP/IP network to the Internet.

In the embodiment of the present application, the PoP is located outside the edge of the cloud network 110, and is an access point for accessing the cloud network 110, where multiple user devices 130 may access the PoP through the carrier network 120, and access a server in the cloud network through the PoP. In some possible implementations, the PoP may be a router, digital-to-analog phone aggregator, server, frame relay or switch, etc., without limitation herein.

In the present embodiment, the operator network 120 includes a plurality of network service providers (internet service provider, ISPs) (e.g., ISP1, ISP2, ISP 3). Wherein the ISP is used for a telecommunication operator providing internet access service, information service, and value added service to a plurality of user equipments 130. In the present embodiment, multiple ISPs are used to access the cloud network 110 for multiple 130. Wherein ISP 121 may access cloud network 110 by connecting one of the pops.

In some possible implementations, the user device 130 may be a personal computer (personal computer, PC), or a modem (modem), or may also be a router with dial-up functionality. The user equipment 130 may be a terminal (terminal), a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like. The user device 130 may be a mobile phone, a tablet (Pad), a computer with wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self driving), a wireless terminal in teleoperation (remote medical surgery), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), etc. The embodiment of the present application does not limit the specific technology and the specific device configuration adopted by the user device 130.

When a user device needs to use a cloud service, it is generally required to reach the cloud network through an operator network, and access a server in the cloud network, so that the cloud service can be used. However, the operator network is very complex and the delay is not controllable. For example, as shown in fig. 1, the user equipment 1 accesses the server 1 deployed in the cloud network through the carrier network 120, there are a plurality of alternative paths, and the delays of different paths may be different. In order to improve user experience, a path with the smallest time delay needs to be selected, and time delays of different paths need to be measured.

Currently, a probing host may be deployed in a server in the cloud network 110 to probe the latency. A common probing method is to use ping, that is, a probing host in the cloud network 110 sends a probing message to the user equipment 130, where the probing message may be an ICMP message. The probing host may then receive the response message returned by the user device 130, and the probing host may calculate a round-trip time (RTT) between the server and the user device 130 based on the timestamp in the response message and the timestamp of the sending probe message.

For this purpose, the application provides a delay detection method and related equipment, which are used for detecting the delay between a server and user equipment.

In the application, a first sending timestamp and a first receiving timestamp are obtained first, then a first response timestamp and a second receiving timestamp are obtained, wherein the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when the gateway receives the first message, the first message is a message sent by a first device to a second device, the first response timestamp is a timestamp carried in the first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device. Then, the first delay from the first device to the second device may be calculated based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp, thereby accurately obtaining the single directional delay of the first device to the second device, rather than the bi-directional delay RTT.

In the method, accurate delays of different directions of the segmented path are obtained through an inline or bypass deployment measurement device in an end-to-end link. On the basis of accurate delay, the scheduling of the incoming or outgoing flow is provided, and the problem of low scheduling accuracy according to RTT in the past is avoided. The accurate delay is obtained by analyzing the packet receiving time and tcp timestamp option, so that the interference of an application layer is reduced, and the message detection is reduced.

In this application, delays in different directions of the flow path are obtained by analyzing TCP timestamp option. The client and the server tcp protocol stack support to use real time as a timestamp, and the precision of the timestamp is microsecond, so that delays of different directions of a flow path are obtained.

In some possible implementations, a PoP may be used as a gateway, all messages coming in and going out of the PoP may be recorded, so as to obtain traffic data, and the PoP may obtain RTTs on the left and right sides of the PoP by analyzing the traffic data. In some possible implementations, poP may be used as a network, and the obtained traffic data may be sent to a delay computing device of a third party, where the delay computing device may obtain RTTs on both sides of the PoP by analyzing the traffic data.

The communication system provided by the present application is described above, and a delay detection method performed based on the communication system is described next. In the following embodiment, the first device may be a user device, and the second device may be a server; or the first device is a server, and the second device is a user device. And are not limited herein.

Referring to fig. 2-1, the delay detection method provided in the first embodiment of the present application mainly includes the following steps:

201. The first device sends a first message to the gateway, the first message carrying a first timestamp.

In some possible implementations, the first message may be a synchronization sequence number (synchronize sequence numbers, SYN) message, or may be another message, which is not limited herein. The SYN message is described below as an example of the first message.

Note that the SYN message is a handshake message used when a connection with respect to TCP is established between two communication devices. For example, when a connection is established between the user equipment and the server with respect to TCP, the user equipment first sends a SYN message to the server. After receiving the SYN message, the server may return a syn_ack message as a reply message indicating that this SYN message was received. Finally, the user equipment replies an ACK message based on the syn_ack message as a response message. Then, the SYN message, the syn_ack message, and the ACK message are referred to as "three-way handshake". After the three-way handshake is completed, a TCP connection is established between the user equipment and the server, and data between the user equipment and the server can be transferred.

In the embodiment of the present application, the first sending timestamp may be carried in the first message. Illustratively, when the first message is a SYN message, a field in the first message that includes a TCP timestamp option (TCP timestamp option), the value of TCP timestamp option may represent a first transmit timestamp of the first message. 2-2, a number of fields are included in the SYN message, wherein TCP timestamp option may be represented as a field TS value (TSval), the value of which is represented by 4 bytes.

In the present embodiment, the first transmit timestamp is an absolute time, e.g., 2023, 3, 15, 10:04, 550 ms, 780 microseconds. In some possible implementations, the accuracy of the first transmit timestamp may be on the order of microseconds. In some possible implementations, the accuracy of the first transmission timestamp may be on the order of milliseconds, or on the order of centiseconds, femtoseconds, nanoseconds, without limitation.

It should be noted that, before step 201 is performed, the first device and the gateway need to achieve time synchronization in advance, and the accuracy of the alignment time is the same as the accuracy of the first transmission time stamp. For example, the first device and the gateway achieve time synchronization in the order of microseconds in advance. The specific time synchronization method is a common technical means, and is not limited herein.

202. The gateway records a first transmit timestamp of the first message and a first receive timestamp of the first message received.

In this embodiment of the present application, after the gateway receives the first message, the gateway may record a first sending timestamp therein, and record a first receiving timestamp when the first message is received. For example, when the first message is a SYN message, the first transmission time stamp may be recorded as syn_timestamp, and the first reception time stamp may be recorded as syn_recv_time. Illustratively, the first transmit timestamp is: 2023, 3, 15, 10:04, 550 ms, 780 μs; the first reception timestamp is: 2023, 3, 15 days 10:04, 550 milliseconds, 840 microseconds.

203. The gateway forwards the first message to the second device.

In the embodiment of the application, after the gateway records the first sending time stamp of the first message and receives the first receiving time stamp of the first message, the first message can be directly transmitted to the second device. In some possible implementations, the gateway may transparently pass the first message to the first device through the carrier network.

204. The second device sends a first response message to the gateway, the first response message carrying a first response timestamp.

In the embodiment of the application, after receiving the first message, the second device may return, to the first device, a first response message to the first device through the gateway based on the first message, where the first response message carries a first response timestamp. In some possible implementations, if the first message is a SYN message, the first response message may be a syn_ack message.

Illustratively, when the first response message is a syn_ack message, a field in the first response message including a TCP timestamp option (TCP timestamp option), the value of TCP timestamp option may represent a first response timestamp of the first response message. Illustratively, a number of fields are included in the syn_ack message, wherein TCP timestamp option may be represented as a field TS value (TSval), the value of which is represented by 4 bytes.

In the present embodiment, the first response time stamp is absolute time, e.g., 2023, 3, 15, 10:04, 550 ms, 900 microseconds. In some possible implementations, the accuracy of the first response time stamp may be on the order of microseconds. In some possible implementations, the accuracy of the first response time stamp may be on the order of milliseconds, or on the order of centiseconds, femtoseconds, nanoseconds, without limitation.

It should be noted that, before executing step 204, the second device and the gateway need to achieve time synchronization in advance, and the accuracy of the alignment time is the same as that of the first response time stamp. For example, the first device and the gateway achieve time synchronization in the order of microseconds in advance. The specific time synchronization method is a common technical means, and is not limited herein.

205. The gateway records a first response time stamp of the first response message and a second reception time stamp of the first response message received.

In this embodiment of the present application, after the gateway receives the first response message, the gateway may record a first response timestamp therein, and record a second reception timestamp when the first response message is received. For example, when the first response message is a syn_ack message, the first response time stamp may be recorded as syn_ack_time, and the second reception time stamp may be recorded as syn_ack_recv_time. Illustratively, the first response time stamp is: 2023, 3, 15, 10:04, 550 ms, 920 μs; the second reception timestamp is: 2023, 3, 15 days 10:04, 550 milliseconds, 960 microseconds.

206. The gateway sends a first response message to the first device.

In the embodiment of the application, after the gateway records the first response time stamp of the first response message and receives the second response time stamp of the first response message, the first response message can be directly transmitted to the first device. In some possible implementations, the gateway may transparently pass the first response message to the first device through the operator network.

207. The first device sends a second response message to the gateway, the second response message carrying a second response timestamp.

In the embodiment of the application, after receiving the first response message, the first device may return a second response message to the second device through the gateway based on the first response message, where the second response message carries a second response timestamp.

In some possible implementations, if the first response message is a syn_ack message, the second response message may be an ACK message.

Illustratively, when the second response message is an ACK message, the value of TCP timestamp option may represent a second response timestamp of the second response message including a field TCP timestamp option in the second response message. Illustratively, a number of fields are included in the ACK message, wherein TCP timestamp option may be represented as a field TS value (TSval), the value of which is represented by 4 bytes.

In the present embodiment, the second response time stamp is absolute time, e.g., 2023, 3, 15, 10:04, 551 ms, 10 microseconds. In some possible implementations, the accuracy of the second response time stamp may be on the order of microseconds. In some possible implementations, the accuracy of the second response time stamp may be on the order of milliseconds, or on the order of centiseconds, femtoseconds, nanoseconds, without limitation.

208. The gateway records a second response time stamp of the second response message and a third reception time stamp of the second response message received.

In this embodiment of the present application, after the gateway receives the second response message, the gateway may record the second response timestamp therein, and record the third reception timestamp when the second response message is received. For example, when the second response message is an ACK message, the second response time stamp may be recorded as ack_timestamp, and the third reception time stamp may be recorded as ack_recv_time. Illustratively, the second response time stamp is: 2023, 3, 15, 10:04, 551 milliseconds, 10 microseconds; the second reception timestamp is: 2023, 3, 15 days 10:04, 551 milliseconds, 50 microseconds.

209. The gateway sends a second response message to the second device.

In this embodiment of the present application, after the gateway records the second response timestamp of the second response message and receives the third reception timestamp of the second response message, the second response message may be directly transmitted to the second device. In some possible implementations, the gateway may transparently pass the second response message to the second device through the cloud backbone.

210. The gateway calculates the delay.

In some possible implementations, the gateway may calculate the time delay of each direction based on the aforementioned first sending timestamp, first receiving timestamp, first response timestamp, second receiving timestamp, second response timestamp, third receiving timestamp, where each direction may refer to: second device to gateway, gateway to first device, first device to gateway, gateway to second device, second device to first device, first device to second device.

Illustratively, the first device-to-gateway latency is noted as lat1, the gateway-to-second device latency is noted as lat2, the second device-to-gateway latency is noted as lat3, and the gateway-to-first device latency is noted as lat4; the first transmit time stamp may be recorded as syn_timestamp, the first receive time stamp may be recorded as syn_recv_time, the first response time stamp may be recorded as syn_ack_timestamp, the second receive time stamp may be recorded as syn_ack_recv_time, the second response time stamp may be recorded as ack_timestamp, and the third receive time stamp may be recorded as ack_recv_time, then:

lat1＝syn_recv_time–syn_timestamp

lat3＝syn_ack_recv_time–syn_ack_timestamp

lat2＝syn_ack_recv_time–syn_recv_time-lat3

lat4＝ack_recv_time–syn_ack_recv_time-lat1

And obtaining the values of lat1, lat2, lat3 and lat4, namely obtaining the time delay from the second equipment to the gateway, the time delay from the gateway to the first equipment, the time delay from the first equipment to the gateway and the time delay from the gateway to the second equipment. Further, the delay (lat 3) from the second device to the gateway and the delay (lat 4) from the gateway to the first device can be added to obtain lat3+lat4, and the lat3+lat4 is taken as the delay from the second device to the first device; adding the delay (lat 1) from the first device to the gateway and the delay (lat 2) from the gateway to the second device to obtain lat1+lat2, wherein lat1+lat2 is taken as the delay from the first device to the second device. By the method, the gateway can calculate and obtain the time delay in all directions.

Illustratively, the first transmit timestamp (syn_timestamp) is: 2023, 3, 15, 10:04, 550 ms, 780 μs; the first reception timestamp (syn_recv_time) is: 2023, 3, 15, 10:04, 550 milliseconds, 840 microseconds; the first response timestamp (syn_ack_timestamp) is: 2023, 3, 15, 10:04, 550 ms, 920 μs; the second receive timestamp (syn_ack_recv_time) is: 2023, 3, 15 days 10:04, 550 milliseconds, 960 microseconds; the second response timestamp (ack_timestamp) is: 2023, 3, 15, 10:04, 551 milliseconds, 10 microseconds; the third reception timestamp (ack_recv_time) is: 2023, 3, 15 days 10:04, 551 milliseconds, 50 microseconds.

Then, the first device-to-gateway delay (lat 1) =first receive timestamp (syn_recv_time) -first transmit timestamp (syn_timestamp) =60 microseconds; delay of the second device to the gateway (lat 3) =second receive timestamp (syn_ack_recv_time) -first response timestamp (syn_ack_time) =40 microseconds; delay of gateway to second device (lat 2) =second receive timestamp (syn_ack_recv_time) -first receive timestamp (syn_recv_time) -lat3=120 microseconds-40 microseconds=80 microseconds; delay of gateway to first device (lat 4) =third receive timestamp (ack_recv_time) -second receive timestamp (syn_ack_recv_time) -lat1=90 microseconds-60 microseconds=30 microseconds.

Then, it can be known that adding the delay from the second device to the gateway (lat 3) and the delay from the gateway to the first device (lat 4) results in lat3+lat4=110 microseconds, resulting in the delay from the second device to the first device; adding the delay (lat 1) from the first device to the gateway and the delay (lat 2) from the gateway to the second device to obtain lat1+lat2=120 microseconds to obtain the delay from the first device to the second device.

In some possible implementations, step 209 and step 210 have no timing relationship, and are not limited herein.

In the application, a first sending timestamp and a first receiving timestamp are firstly obtained by a gateway, then a first response timestamp and a second receiving timestamp are obtained by the gateway, wherein the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when the gateway receives the first message, the first message is a message sent to a second device by a first device, the first response timestamp is a timestamp carried in the first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent to the first device by the second device. Then, the first delay from the first device to the second device may be calculated based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp, thereby accurately obtaining the single directional delay of the first device to the second device, rather than the bi-directional delay RTT.

Referring to fig. 3, the delay detection method provided in the second embodiment of the present application mainly includes the following steps:

301. the first device sends a first message to the gateway, the first message carrying a first timestamp.

302. The gateway records a first transmit timestamp of the first message and a first receive timestamp of the first message received.

303. The gateway forwards the first message to the second device.

304. The second device sends a first response message to the gateway, the first response message carrying a first response timestamp.

305. The gateway records a first response time stamp of the first response message and a second reception time stamp of the first response message received.

306. The gateway sends a first response message to the first device.

307. The first device sends a second response message to the gateway, the second response message carrying a second response timestamp.

308. The gateway records a second response time stamp of the second response message and a third reception time stamp of the second response message received.

309. The gateway sends a second response message to the second device.

Steps 301-309 are identical to steps 201-209 and are not described in detail herein.

310. The gateway sends the timestamp information to the latency computing device.

In an embodiment of the present application, the timestamp information may include a first transmission timestamp, a first reception timestamp, a first response timestamp, a second reception timestamp, a second response timestamp, and a third reception timestamp.

311. The delay calculating device calculates a delay.

Step 311 is identical to step 210 and will not be described again here.

In the application, a first sending timestamp, a first receiving timestamp, a first response timestamp and a second receiving timestamp are acquired by a gateway, wherein the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when the gateway receives the first message, the first message is a message sent by a first device to a second device, the first response timestamp is a timestamp carried in the first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device. Then, the gateway may send the first transmission timestamp, the first reception timestamp, the first response timestamp, and the second reception timestamp to the delay computing device, which may calculate the first delay from the first device to the second device based on the first timestamp, the first reception timestamp, the first response timestamp, and the second reception timestamp, thereby accurately obtaining the single directional delay of the first device to the second device, instead of the bi-directional delayed RTT.

It should be noted that, for simplicity of description, the foregoing method embodiments are all expressed as a series of action combinations, but it should be understood by those skilled in the art that the present application is not limited by the order of actions described, as some steps may be performed in other order or simultaneously in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required in the present application.

In order to facilitate better implementation of the above-described aspects of the embodiments of the present application, the following further provides related devices for implementing the above-described aspects.

Referring to fig. 4, a delay calculating device 400 provided in an embodiment of the present application may include:

a transceiver module 401, configured to obtain a first sending timestamp and a first receiving timestamp, where the first sending timestamp is a timestamp carried in a first message, the first receiving timestamp is a timestamp when a gateway receives the first message, and the first message is a message sent by a first device to a second device;

the transceiver module 401 is configured to obtain a first response timestamp and a second reception timestamp, where the first response timestamp is a timestamp carried in a first response message, the second reception timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device;

A processing module 402 is configured to calculate a first delay from the first device to the second device based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp.

In some of the possible implementations of the present invention,

the transceiver module 401 is specifically configured to:

receiving the first message and acquiring the first sending time stamp in the first message;

the processing module 402 is further configured to:

recording the time point when the first message is received as the first receiving time stamp.

In some of the possible implementations of the present invention,

the transceiver module 401 is specifically configured to:

receiving the first response message and acquiring the first response time stamp in the first response message;

the processing module 402 is further configured to:

recording the time point when the first response message is received as the second receiving time stamp.

In some possible implementations, the transceiver module 401 is specifically configured to:

receiving the first sending time stamp and the first receiving time stamp sent by the gateway;

and receiving the first response time stamp and the second receiving time stamp sent by the gateway.

In some of the possible implementations of the present invention,

the first delay is equal to the first device-to-gateway delay lat1 plus the gateway-to-second device delay lat2, wherein lat1 = the first receive timestamp-the first transmit timestamp, lat2 = the first response timestamp-the first receive timestamp- (the second receive timestamp-the first response timestamp).

In some possible implementations, the first transmit timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp are all real times on the order of microseconds.

In some of the possible implementations of the present invention,

the transceiver module 401 is further configured to:

acquiring a second response time stamp and a third receiving time stamp, wherein the second response time stamp is a time stamp carried in a second response message, the third receiving time stamp is a time stamp when the gateway receives the second response message, and the second response message is a message sent by the first device to the second device;

the processing module 402 is further configured to:

a second delay from the second device to the first device is calculated based on the first response time stamp, the second receive time stamp, the second response time stamp, and the third receive time stamp.

In some of the possible implementations of the present invention,

the transceiver module 401 is specifically configured to:

receiving the second response message and acquiring the second response time stamp in the second response message;

recording the time point when the second response message is received as the third receiving time stamp.

and receiving the second response time stamp and the third receiving time stamp sent by the gateway.

In some of the possible implementations of the present invention,

the second delay is equal to the second device to gateway delay lat3 plus the gateway to first device delay lat4, wherein lat3 = the second receive timestamp-the first response timestamp, lat4 = third receive timestamp-second receive timestamp- (first receive timestamp-first transmit timestamp).

In some possible implementations, the second response time stamp and the third receive time stamp are each real times on the order of microseconds.

In some possible implementations, the second device is a user device, the gateway is an access point in a cloud network, and the gateway and the second device communicate through an operator network.

In some possible implementations, the first device is a server in a cloud network, and the first device and the gateway communicate through a cloud backbone network in the cloud network.

It should be noted that, because the content of information interaction and execution process between the modules/units of the above-mentioned device is based on the same concept as the method embodiment of the present application, the technical effects brought by the content are the same as the method embodiment of the present application, and specific content can be referred to the description in the method embodiment shown in the foregoing application, which is not repeated here.

The embodiment of the application also provides a computer storage medium, wherein the computer storage medium stores a program, and the program executes part or all of the steps described in the embodiment of the method.

Referring to fig. 5, referring to another communication device provided in the embodiment of the present application, a communication device 500 includes:

a receiver 501, a transmitter 502, a processor 503 and a memory 504. In some embodiments of the present application, the receiver 501, transmitter 502, processor 503, and memory 504 may be connected by a bus or other means, where a bus connection is illustrated in fig. 5.

Memory 504 may include read only memory and random access memory and provides instructions and data to processor 503. A portion of the memory 504 may also include non-volatile random access memory (NVRAM). Memory 504 stores an operating system and operating instructions, executable modules or data structures, or a subset thereof, or an extended set thereof, where the operating instructions may include various operating instructions for performing various operations. The operating system may include various system programs for implementing various underlying services and handling hardware-based tasks.

The processor 503 controls the operation of the communication device 500, the processor 503 may also be referred to as a central processing unit (central processing unit, CPU). In a specific application, the various components of the communications device 500 are coupled together by a bus system, which may include a power bus, a control bus, a status signal bus, and the like, in addition to a data bus. For clarity of illustration, however, the various buses are referred to in the figures as bus systems.

The method disclosed in the embodiments of the present application may be applied to the processor 503 or implemented by the processor 503. The processor 503 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry of hardware in the processor 503 or instructions in the form of software. The processor 503 may be a general purpose processor, a digital signal processor (digital signal processing, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field-programmable gate array (field-programmable gate array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software modules in a decoded processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in a memory 504 and the processor 503 reads the information in the memory 504 and in combination with its hardware performs the steps of the method described above.

The receiver 501 may be configured to receive input digital or character information and generate signal inputs related to related settings and function control, the transmitter 502 may include a display device such as a display screen, and the transmitter 502 may be configured to output digital or character information via an external interface.

In this embodiment, the processor 503 is configured to perform the foregoing delay detection method.

In another possible design, when the delay computing apparatus 400 or the communication device 500 is a chip, it includes: a processing unit, which may be, for example, a processor, and a communication unit, which may be, for example, an input/output interface, pins or circuitry, etc. The processing unit may execute the computer-executable instructions stored in the storage unit to cause the chip in the terminal to perform the method for transmitting wireless report information according to any one of the above first aspects. Alternatively, the storage unit is a storage unit in the chip, such as a register, a cache, or the like, and the storage unit may also be a storage unit in the terminal located outside the chip, such as a read-only memory (ROM) or other type of static storage device that may store static information and instructions, a random access memory (random access memory, RAM), or the like.

The processor mentioned in any of the above may be a general-purpose central processing unit, a microprocessor, an ASIC, or one or more integrated circuits for controlling the execution of the programs of the above method.

It should be further noted that the above-described apparatus embodiments are merely illustrative, and that the units described as separate units may or may not be physically separate, and that units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the application, the connection relation between the modules represents that the modules have communication connection therebetween, and can be specifically implemented as one or more communication buses or signal lines.

From the above description of the embodiments, it will be apparent to those skilled in the art that the present application may be implemented by means of software plus necessary general purpose hardware, or of course may be implemented by dedicated hardware including application specific integrated circuits, dedicated CPUs, dedicated memories, dedicated components and the like. Generally, functions performed by computer programs can be easily implemented by corresponding hardware, and specific hardware structures for implementing the same functions can be varied, such as analog circuits, digital circuits, or dedicated circuits. However, a software program implementation is a preferred embodiment in many cases for the present application. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a readable storage medium, such as a floppy disk, a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk of a computer, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the method described in the embodiments of the present application.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be stored by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

Claims

1. A method of latency detection comprising:

acquiring a first sending time stamp and a first receiving time stamp, wherein the first sending time stamp is a time stamp carried in a first message, the first receiving time stamp is a time stamp when a gateway receives the first message, and the first message is a message sent by a first device to a second device;

acquiring a first response time stamp and a second receiving time stamp, wherein the first response time stamp is a time stamp carried in a first response message, the second receiving time stamp is a time stamp when the gateway receives the first response message, and the first response message is a message sent to the first device by the second device;

a first delay from the first device to the second device is calculated based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp.

2. The method of claim 1, wherein the method comprises the steps of,

the acquiring the first sending timestamp and the first receiving timestamp includes:

3. A method according to claim 1 or 2, characterized in that,

the acquiring the first response time stamp and the second receiving time stamp includes:

4. The method of claim 1, wherein the obtaining the first transmit timestamp and the first receive timestamp comprises:

the obtaining the first response time stamp and the second receiving time stamp includes:

5. The method according to any one of claim 1 to 4, wherein,

6. The method of any of claims 1-5, the first transmit timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp are real times on the order of microseconds.

7. The method according to any one of claims 1-6, further comprising:

8. The method of claim 7, wherein the step of,

the obtaining the second response timestamp and the third reception timestamp includes:

9. The method of claim 7, wherein the obtaining the second response time stamp and the third receive time stamp comprises:

10. The method according to any one of claims 7 to 9, wherein,

11. The method according to any of claims 7-10, wherein the second response time stamp and the third reception time stamp are real time in the order of microseconds.

12. The method according to any of claims 1-11, wherein the second device is a user device, the gateway is an access point in a cloud network, and communication between the gateway and the second device is via an operator network.

13. The method of any of claims 1-12, wherein the first device is a server in a cloud network, and wherein the first device and the gateway communicate through a cloud backbone in the cloud network.

14. A time delay computing device, comprising:

the receiving and transmitting module is used for acquiring a first sending time stamp and a first receiving time stamp, wherein the first sending time stamp is a time stamp carried in a first message, the first receiving time stamp is a time stamp when the gateway receives the first message, and the first message is a message sent by a first device to a second device;

the transceiver module is configured to obtain a first response timestamp and a second receiving timestamp, where the first response timestamp is a timestamp carried in a first response message, the second receiving timestamp is a timestamp when the gateway receives the first response message, and the first response message is a message sent by the second device to the first device;

a processing module for calculating a first delay from the first device to the second device based on the first timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp.

15. The latency computing device of claim 14,

the transceiver module is specifically configured to:

the processing module is further configured to:

16. The latency computing device of claim 14 or 15,

the transceiver module is specifically configured to:

the processing module is further configured to:

17. The delay computing device of claim 14, wherein the transceiver module is specifically configured to:

18. The latency computing device of any of claims 14-17,

19. The latency computing device of any of claims 14-18, the first transmit timestamp, the first receive timestamp, the first response timestamp, and the second receive timestamp are all real times on the order of microseconds.

20. The latency computing device of any of claims 14-19,

the transceiver module is further configured to:

the processing module is further configured to:

21. The latency computing device of claim 20,

the transceiver module is specifically configured to:

22. The delay computing device of claim 20, wherein the transceiver module is specifically configured to:

23. The latency computing device of any of claims 20-22,

24. The latency computing device of any of claims 20-23, wherein the second response timestamp and the third receive timestamp are each real times on the order of microseconds.

25. The latency computing device of any of claims 14-24, wherein the second device is a user device, the gateway is an access point in a cloud network, and communication between the gateway and the second device is through an operator network.

26. The latency computing device of any of claims 14-25, wherein the first device is a server in a cloud network, the first device and the gateway communicating through a cloud backbone in the cloud network.

27. A computer readable storage medium, characterized in that the computer readable storage medium stores a program that causes a computer device to execute the method according to any one of claims 1-13.

28. A computer program product, the computer program product comprising computer-executable instructions stored on a computer-readable storage medium; at least one processor of a device reads the computer-executable instructions from the computer-readable storage medium, the at least one processor executing the computer-executable instructions causing the device to perform the method of any one of claims 1-13.

29. A communication device comprising at least one processor, a memory, and a communication interface;

the at least one processor is coupled with the memory and the communication interface;

the memory is used for storing instructions, the processor is used for executing the instructions, and the communication interface is used for communicating with other communication devices under the control of the at least one processor;

the instructions, when executed by the at least one processor, cause the at least one processor to perform the method of any of claims 1-13.

30. A chip system comprising a processor and a memory, the memory and the processor being interconnected by a line, the memory having instructions stored therein, the processor being configured to perform the method of any of claims 1-13.