CN115208806B - Method and device for testing NTP server response capability - Google Patents
Method and device for testing NTP server response capability Download PDFInfo
- Publication number
- CN115208806B CN115208806B CN202210803310.1A CN202210803310A CN115208806B CN 115208806 B CN115208806 B CN 115208806B CN 202210803310 A CN202210803310 A CN 202210803310A CN 115208806 B CN115208806 B CN 115208806B
- Authority
- CN
- China
- Prior art keywords
- ntp
- time synchronization
- test
- server
- request message
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 119
- 230000004044 response Effects 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 20
- 238000007726 management method Methods 0.000 claims description 20
- 238000013523 data management Methods 0.000 claims description 10
- 238000010998 test method Methods 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 5
- 238000004088 simulation Methods 0.000 abstract description 4
- 230000003993 interaction Effects 0.000 description 12
- 230000001360 synchronised effect Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/50—Testing arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
- H04J3/0658—Clock or time synchronisation among packet nodes
- H04J3/0661—Clock or time synchronisation among packet nodes using timestamps
- H04J3/0667—Bidirectional timestamps, e.g. NTP or PTP for compensation of clock drift and for compensation of propagation delays
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a method and a device for testing response capability of an NTP server, and relates to the field of server testing, wherein the method comprises the steps of importing an NTP client parameter generation rule, test parameters and an IP address of the tested NTP server; acquiring the MAC address of a tested NTP server; generating an NTP time synchronization request message; transmitting an NTP time synchronization request message to an NTP server, and enabling S1=S1+1; receiving an analyzed NTP time synchronization response message, and enabling S2=S2+1; judging whether stopping, if so, proceeding to step 7, otherwise proceeding to step 4; analyzing the NTP time synchronization response message, the sending quantity S1 and the receiving quantity S2 to determine the testing result of the NTP server; the method supports the generation, the receiving and the analysis of the NTP message by using the network maximum bandwidth simulation multi-NTP client connected between the testing equipment and the tested NTP server, realizes the testing of the processing capacity of the NTP server, adopts the hardware NTP message generator based on the FPGA to automatically generate the NTP message according to the simulated NTP client parameters, and realizes the transmission of the network maximum bandwidth simulation NTP customer service end.
Description
Technical Field
The present invention relates to the field of server testing, and in particular, to a method and apparatus for testing response capability of an NTP server.
Background
The NTP is a standard network protocol for time synchronization in the Internet, and aims to transmit unified and standard time on the Internet.
The working modes of the NTP are three, namely: client/server mode, symmetric mode, and broadcast/multicast mode. The client/server mode is the most common and most extensive, the NTP client actively initiates a time synchronization request to the NTP server, the NTP server passively replies a time synchronization reply, and the NTP client receives the corresponding time synchronization and synchronizes own system time according to an NTP algorithm.
Along with the rapid increase of the number of user equipment of the NTP network time service, higher requirements are put forward on the performance of the NTP server, and particularly, the response capability of the NTP server also needs to be reasonably evaluated. So that when some local area networks lay out the NTP servers, the layout scheme of the NTP servers can be formulated according to the number of users needing time service in the local area network.
The current method for testing the response capability of the NTP server mainly adopts a method for simulating the NTP time synchronization request message by software, and can not enable the sending rate of the NTP time synchronization request message to reach the maximum limit of network bandwidth.
Disclosure of Invention
The invention aims to solve the problems and designs a testing method and a testing device for NTP server response capability.
The invention realizes the above purpose through the following technical scheme:
a test method for NTP server response capability, comprising:
step 1, importing parameter generation rules, test parameters and IP addresses of tested NTP servers of an NTP client;
Step 2, acquiring the MAC address of the tested NTP server;
Step 3, generating an NTP time synchronization request message of an NTP client;
Step 4, transmitting an NTP time synchronization request message to an NTP server, and enabling the transmission quantity s1=s1+1;
Step 5, receiving and analyzing an NTP time synchronization response message of the NTP server, and enabling the receiving quantity S2=S2+1;
Step 6, judging whether to stop the test, if yes, entering the step 7, otherwise, returning to the step 4;
and 7, analyzing the NTP time synchronization response message, the current sending number S1 and the current receiving number S2, and determining the test result of the NTP server.
The testing device for the response capability of the NTP server is applied to the testing method for the response capability of the NTP server, and comprises the following steps:
a reservoir; the memory is used for storing a computer program;
an actuator; the executor is configured to execute a computer program that, when executed, implements a test method for NTP server response capability as described above.
The invention has the beneficial effects that: the method supports the generation, the receiving and the analysis of the NTP message by using the network maximum bandwidth simulation multi-NTP client connected between the testing equipment and the tested NTP server, realizes the testing of the processing capacity of the NTP server, adopts the hardware NTP message generator based on the FPGA to automatically generate the NTP message according to the simulated NTP client parameters, and realizes the transmission of the network maximum bandwidth simulation NTP customer service end; the method has the advantages that the method adopts the FPGA-based hardware mode to finish the reception and analysis of the NTP message, ensures that the reception and analysis of the response message of the NTP server can be finished by connecting the maximum bandwidth of the network, and realizes the processing capability test of the NTP server.
Drawings
Fig. 1 is a flow chart of a method of testing NTP server response capability;
Fig. 2 is a schematic diagram of a test system architecture.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships conventionally put in place when the inventive product is used, or the directions or positional relationships conventionally understood by those skilled in the art are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, terms such as "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The following describes specific embodiments of the present invention in detail with reference to the drawings.
A test method for NTP server response capability, comprising:
And step 1, importing parameter generation rules, test parameters and the IP address of the tested NTP server of the NTP client.
And step 2, sending an ARP request message to the tested NTP server, and obtaining the MAC address of the tested NTP server.
And step 3, generating an NTP time synchronization request message of the NTP client according to the MAC address and the IP address of the NTP server and the NTP protocol.
And 4, transmitting an NTP time synchronization request message to an NTP server, wherein the transmission quantity S1=S1+1.
And 5, receiving, analyzing and extracting relevant timestamp information in the NTP time synchronization response message, writing the relevant timestamp information into a test data buffer, and enabling the receiving quantity S2=S2+1, wherein the relevant timestamp information comprises a sending timestamp T1 and a receiving timestamp T2 corresponding to the NTP time synchronization request message, and the sending timestamp T3 and the receiving timestamp T4 of the NTP time synchronization response message.
Step 6, according to whether the current test duration does not exceed the preset test duration, if so, continuing the test, and returning to the step 4; otherwise, stopping the test, and proceeding to step 7.
And 7, calculating the time synchronization performance of the measured NTP server by using the time synchronization algorithm in the NTP protocol and taking the number of the effective NTP time synchronization response messages received in unit time as the maximum response capacity of the measured NTP server.
The testing device for the response capability of the NTP server is applied to the testing method for the response capability of the NTP server, and comprises the following steps:
a reservoir; the memory is used for storing a computer program;
an actuator; the executor is configured to execute a computer program that, when executed, implements a test method for NTP server response capability as described above.
The test system for NTP server response capability includes:
An NTP test interface module; the NTP test interface module is a necessary functional component for accessing the Ethernet, and the main function is to send and receive the data frame of the Ethernet;
A test management interface module; the test management interface module is a data transmission module between the test system and the man-machine interaction system, and the man-machine interaction system can be a computer or other equipment. In order to adapt to the high-speed transmission characteristic of test data acquisition, the test management interface module can be a PCIE, USB or Ethernet component used for high-speed data transmission;
A system time management module; the system time management module is used for providing system time for the test system, and the format of the system time is a 64-bit unsigned counter conforming to the NTP time, wherein the upper 32 bits are integer seconds, and the lower 32 bits are decimal seconds. The system time is used for recording the sending time stamp and the receiving time stamp of the NTP time synchronization message of the testing system in the process of testing the NTP server. The system time management module receives the reference time of the time frequency reference module, compares the system time with the reference source time at the quasi-second moment of the reference time, and automatically calibrates the system time after the deviation of the system time and the reference source time exceeds a set range;
Time-frequency reference module: the time frequency reference module is used for calibrating the system time of the test system, processing the frequency source signal and generating a working clock of the system time management module;
An NTP test management module; the NTP test management module sends an ARP request message for analyzing the MAC address of the tested NTP server; resolving the ARP response message and acquiring the MAC address of the NTP server; rules for automatically generating NTP client parameters automatically generate NTP client information and manage the NTP client information; transmitting an NTP time synchronization request message to a tested NTP server at a set transmission rate and the like in the time set by the test parameters, and counting the transmission quantity S1; receiving and analyzing an effective NTP time synchronization response message from an NTP server and counting the received quantity S2; extracting relevant time stamps of each effective NTP time synchronization response message and writing the relevant time stamps into a test data buffer of a test data management module in sequence; after the test duration meets the set test time, outputting S1 and S2 to the test data management module and stopping the current test
The test data management module is a test data management and parameter configuration unit of the test system, and the main functions comprise test data buffer management, uploading test data in the test data buffer after packaging to the man-machine interaction system and analyzing relevant configuration parameters of the NTP client issued by the man-machine interaction system, and outputting the configuration parameters to the NTP test management module. The test data cache management adopts paging management, and after each page of test data is full, the test data is actively uploaded to a human-computer interaction system for performing time synchronization performance analysis of the tested NTP server. And after the current test is stopped, uploading the S1 and the S2 to a man-machine interaction system for calculating the maximum response capacity of the tested NTP server in the current scene.
The detailed test method is as follows:
1. Before testing, especially when time synchronization performance testing is needed, the test system needs to access a standard time source and a standard frequency source and complete system time calibration.
2. The man-machine interaction system sets the IP address of the tested NTP service, the NTP client parameter generation rule and the test parameter through the test management interface. The NTP client parameter generation rules mainly include the number of NTP clients, automatically generating ranges of IP addresses and MAC addresses, whether MD5 message digests are used, etc. The IP address and MAC address may be selected to be automatically generated or manually set, with the automatic generation actively avoiding multicast and broadcast addresses. The test parameters mainly comprise test time and NTP time synchronization request message sending rate, and the NTP time synchronization request message is sent by default by using a line speed. And loading the setting parameters by the NTP test management module, automatically generating and managing the related parameters of the NTP client according to the parameter generation rule of the NTP client, and using the parameters in a polling mode when the NTP time synchronization request message is sent subsequently.
And 3, after loading the IP address of the tested server, the NTP test management module starts ARP request message framing by using the generated IP address and MAC address of any one of the NTP clients. And after the ARP request message is sent, waiting for an ARP response message of the tested NTP server. And the NTP test management module analyzes the ARP response message from the tested NTP server, and then extracts and latches the MAC address of the ARP response message.
Ntp time synchronization request message transmission:
1) The NTP test management module calculates an initial value T of a packet sending timer according to the set NTP time synchronization request message sending rate, and when the timer is set, an NTP time synchronization request message sending mark is generated and the initial value T is reloaded. When the NTP time synchronization request message sending mark is generated, the current system time is obtained as the sending time stamp T1 of the NTP time synchronization request message, and the NTP time synchronization request message is automatically generated according to RFC5095 according to the NTP client information of the NTP time synchronization request message which is required to be sent currently.
2) And transmitting the NTP time synchronization request message of the NTP client to a tested NTP server, and counting the transmission quantity S1 of the NTP time synchronization request message.
3) Outputting the number S1 of the NTP time synchronization request messages to the test data management module when the test duration meets the set test time, and ending the transmission flow.
5. And receiving an NTP time synchronization reply message of the tested NTP server:
1) And receiving the NTP time synchronization reply message of the tested NTP server, and analyzing the effective NTP time synchronization reply message which is sent to the simulated NTP client of the test system by the tested NTP server.
2) And extracting T1 (Originate Timestamp), T2 (RECEIVE TIMESTAMP), T3 (TRANSMIT TIMESTAMP) and the receiving time stamp of the message from the effective NTP time synchronization reply message as T4 (Destination Timestamp) and writing the receiving time stamp into a test data cache of the test data management module according to a certain storage sequence. And the test data management module transmits the test data to the human-computer interaction system for time synchronization performance analysis according to the storage state of the test data buffer after the test data buffer is written with one page. And simultaneously counting the receiving quantity S2 of the effective NTP time synchronization reply messages.
3) Outputting the receiving quantity S2 of the NTP time synchronization reply messages to the test data management module when the test duration meets the set test time, and ending the receiving flow.
6. After the receiving and sending processes are finished, the test data management module uploads the sending number S1 and the receiving number S2 to the man-machine interaction system, and the man-machine interaction system comprehensively analyzes relevant test data uploaded by the test system to calculate the time synchronization performance and the maximum response capacity of the tested NTP server.
According to the method and the system for testing the response capability of the NTP server, which are realized by the invention, the FPGA is used for realizing a hardware processing network protocol, so that the transmission of the NTP time synchronization request message and the receiving analysis of the NTP time synchronization response message can reach the line rate, and the response capability of the NTP server can be tested. Different testing parameters and NTP client parameter generating rules are set according to the man-machine interaction system, and testing of various scene applications can be completed. When the testing system is connected with the standard time source and the frequency source, originate Timestamp is inserted in the NTP synchronous time request message in real time, and meanwhile, the relevant timestamp data of the received NTP time synchronous response message is cached and transmitted to the man-machine interaction system, so that the testing of the time synchronous performance of the tested NTP server is completed. The test system provided by the invention can adapt to multi-scenario test, and the whole test flow is simple to set, so that the test difficulty is greatly reduced and the test workload is reduced.
The technical scheme of the invention is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the invention fall within the protection scope of the invention.
Claims (7)
1. A method for testing the response capability of an NTP server, comprising:
step 1, importing parameter generation rules, test parameters and IP addresses of tested NTP servers of an NTP client;
Step 2, acquiring the MAC address of the tested NTP server;
Step 3, generating an NTP time synchronization request message of the NTP client according to the simulated NTP client parameter MAC address and the IP address and the NTP protocol by adopting a hardware NTP message generator based on the FPGA;
step 4, the NTP test interface module sends an NTP time synchronization request message to an NTP server, and the sending quantity S1=S1+1; the method comprises the following steps:
1) The NTP test management module calculates an initial value T of a packet sending timer according to the set NTP time synchronization request message sending rate, and when the timer is set, an NTP time synchronization request message sending mark is generated and the initial value T is reloaded; when the NTP time synchronization request message sending mark is generated, acquiring the current system time as a sending time stamp T1 of the NTP time synchronization request message, and automatically generating the NTP time synchronization request message according to RFC5095 according to the NTP client information of the NTP time synchronization request message which is required to be sent currently;
2) Transmitting the NTP time synchronization request message of the NTP client to a tested NTP server, and counting the transmission quantity S1 of the NTP time synchronization request message; when in transmission, the NTP test management module transmits an NTP time synchronization request message to a tested NTP server at a set transmission rate and the like in the time set by the test parameters, and counts the transmission quantity S1;
3) Outputting the number S1 of the NTP time synchronization request messages to the test data management module when the test duration meets the set test time, and ending the transmission flow;
step 5, receiving and analyzing an NTP time synchronization response message of the NTP server, and enabling the receiving quantity S2=S2+1;
Step 6, judging whether to stop the test, if yes, entering the step 7, otherwise, returning to the step 4;
and 7, analyzing the NTP time synchronization response message, the current sending number S1 and the current receiving number S2, and determining the test result of the NTP server.
2. The method according to claim 1, wherein in step 5, the relevant timestamp information in the NTP time-synchronization response message is analyzed and extracted and written into the test data buffer.
3. The method according to claim 1, wherein in step 5, the related timestamp information includes a transmission timestamp T1 and a reception timestamp T2 of the corresponding NTP time synchronization request message, and the transmission timestamp T3 and the reception timestamp T4 of the NTP time synchronization response message.
4. The method according to claim 1, wherein in step 6, according to whether the current test duration does not exceed the preset test duration, if so, the test is continued, otherwise, the test is stopped.
5. The method according to claim 2, wherein in step 7, the time synchronization performance of the NTP server to be tested is calculated using the time synchronization algorithm in the NTP protocol and the number of valid NTP time synchronization response messages received per unit time is taken as the maximum response capability of the NTP server to be tested.
6. The method according to claim 1, wherein in step 2, an ARP request message is sent to the NTP server under test, and the MAC address of the NTP server under test is obtained.
7. A testing apparatus for NTP server response capability, applied to a testing method for NTP server response capability according to any one of claims 1-6, comprising:
a reservoir; the memory is used for storing a computer program;
An actuator; the executor is configured to execute a computer program that, when executed, implements the test method for NTP server response capability of any of claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210803310.1A CN115208806B (en) | 2022-07-07 | 2022-07-07 | Method and device for testing NTP server response capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210803310.1A CN115208806B (en) | 2022-07-07 | 2022-07-07 | Method and device for testing NTP server response capability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115208806A CN115208806A (en) | 2022-10-18 |
| CN115208806B true CN115208806B (en) | 2024-04-30 |
Family
ID=83580118
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210803310.1A Active CN115208806B (en) | 2022-07-07 | 2022-07-07 | Method and device for testing NTP server response capability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115208806B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117453505A (en) * | 2023-10-30 | 2024-01-26 | 中国电子技术标准化研究院 | Device and method for calibrating time parameters of software performance testing tool |
| CN117560110B (en) * | 2024-01-12 | 2024-04-26 | 深圳市太铭科技有限公司 | NTP time service method and system for high access request |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043461A (en) * | 2007-04-24 | 2007-09-26 | 华为技术有限公司 | Method for testing DHCPv6 service and client |
| WO2018084808A1 (en) * | 2016-11-04 | 2018-05-11 | Singapore University Of Technology And Design | Computer-implemented method and data processing system for testing device security |
| CN108322281A (en) * | 2018-05-14 | 2018-07-24 | 上海市计量测试技术研究院 | Time calibration in network service based on NTP and assessment system and method |
| KR20190094499A (en) * | 2018-02-05 | 2019-08-14 | 맥슨씨아이씨 주식회사 | apparatus for testing load capacity of ptp/ntp server |
| CN111447302A (en) * | 2020-03-30 | 2020-07-24 | 山东华辰连科通信网络有限公司 | Method and system for simulating multi-client to test DHCP (dynamic host configuration protocol) by using raw socket |
| CN114448823A (en) * | 2022-01-27 | 2022-05-06 | 苏州浪潮智能科技有限公司 | NFS service testing method and system and electronic equipment |
-
2022
- 2022-07-07 CN CN202210803310.1A patent/CN115208806B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101043461A (en) * | 2007-04-24 | 2007-09-26 | 华为技术有限公司 | Method for testing DHCPv6 service and client |
| WO2018084808A1 (en) * | 2016-11-04 | 2018-05-11 | Singapore University Of Technology And Design | Computer-implemented method and data processing system for testing device security |
| KR20190094499A (en) * | 2018-02-05 | 2019-08-14 | 맥슨씨아이씨 주식회사 | apparatus for testing load capacity of ptp/ntp server |
| CN108322281A (en) * | 2018-05-14 | 2018-07-24 | 上海市计量测试技术研究院 | Time calibration in network service based on NTP and assessment system and method |
| CN111447302A (en) * | 2020-03-30 | 2020-07-24 | 山东华辰连科通信网络有限公司 | Method and system for simulating multi-client to test DHCP (dynamic host configuration protocol) by using raw socket |
| CN114448823A (en) * | 2022-01-27 | 2022-05-06 | 苏州浪潮智能科技有限公司 | NFS service testing method and system and electronic equipment |
Non-Patent Citations (3)
| Title |
|---|
| "Mainatream Components for Near Hard Real-Time Distributed Simulation and Testing";Fernand Quartier;《2014 IEEE/ACM 18th International Symposium on Distributed Simulation and Real Time Applications》;20141231;全文 * |
| "NTP服务器的响应阈值测试软件设计";吴鹏;华宇;张旭海;;《时间频率学报》(第01期);全文 * |
| 吴鹏 ; 华宇 ; 张旭海 ; ."NTP服务器的响应阈值测试软件设计".《时间频率学报》.2017,(第01期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115208806A (en) | 2022-10-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115208806B (en) | Method and device for testing NTP server response capability | |
| CN102027699B (en) | Data transfer method and system for loudspeakers in a digital sound reproduction system | |
| KR101451194B1 (en) | Method and apparatus for measuring distance in contents delivery network | |
| US20030214982A1 (en) | Method and circuit for insertion of time stamp into real time data | |
| EP1953937A1 (en) | Clock synchronization aid device for communication station(s) of a wireless network, and associated clock synchronization device | |
| CN110908363A (en) | Data acquisition method and device for vehicle-mounted terminal | |
| CN103138887B (en) | A kind of processing method and system of 1588 event message | |
| CN103167044A (en) | Intelligent analysis method of domain name system (DNS) and poking measurement device and system | |
| CN112887045B (en) | Message transmission method and device, FPGA (field programmable Gate array) and electronic equipment | |
| CN110381071B (en) | Message transmission method and device and sender equipment | |
| US9893945B2 (en) | Process system for constructing network structure deployment diagram and method thereof and computer program product storing analysis program of network structure deployment | |
| CN102098154A (en) | Method for transmitting precision clock synchronization protocol messages, apparatus and system thereof | |
| CN108011778B (en) | Method and device for acquiring message transmission delay time | |
| CN115514682A (en) | Data transmission method, device, equipment and storage medium | |
| KR101044065B1 (en) | Method for Synchronizing Time in IPTV Service Network | |
| CN111935316B (en) | Method and device for acquiring front-end equipment catalog | |
| CN114520784A (en) | Dynamic content accelerated access method and device | |
| CN108540347B (en) | Network cable two-end signal delay sequence matching generation method for network signal tracing | |
| CN110740078B (en) | Proxy monitoring method of server and related products | |
| CN113810243B (en) | Delay testing method and device | |
| CN112671949A (en) | Method and system for associating session before and after NAT according to syslog | |
| CN112398560A (en) | Measuring method, measuring device and storage medium | |
| CN100401677C (en) | Method for realizing clock synchronization of fixed network short message platform | |
| CN116722947A (en) | Audio synchronization method, system, device and storable medium | |
| CN112291209B (en) | Method and device for acquiring front-end equipment catalog |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |