CN107547298B - Link bandwidth testing method and device - Google Patents
Link bandwidth testing method and device Download PDFInfo
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- CN107547298B CN107547298B CN201710393585.1A CN201710393585A CN107547298B CN 107547298 B CN107547298 B CN 107547298B CN 201710393585 A CN201710393585 A CN 201710393585A CN 107547298 B CN107547298 B CN 107547298B
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Abstract
The invention provides a link bandwidth testing method and a device, wherein for any service cell of a target testing network, a vehicle-mounted router determines the message sending rate by using a dichotomy, a flow tester sends a preset number of test messages for testing according to the message sending rate determined by the vehicle-mounted router, and further the vehicle-mounted router determines the link bandwidth of the target testing network in the service cell according to the test result of the dichotomy test, so that the automatic test of the link bandwidth on a high-speed rail is realized.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a link bandwidth testing method and apparatus.
Background
The high-speed rail changes the travel mode of people and is greatly convenient for the daily life of people. With the rapid increase of the operating mileage of high-speed rail, providing a stable and efficient internet surfing environment for high-speed rail passengers also becomes an important part of high-speed rail construction. High-speed rail vehicle-mounted routers (hereinafter referred to as vehicle-mounted routers) are designed and developed for the purpose. Because of the characteristic of high-speed movement of high-speed rails, the optimal selection of the uplink of the current vehicle-mounted router is to use an LTE (Long Term Evolution) 4G (fourth generation mobile communication technology) network (hereinafter referred to as an LTE network), and the LTE network theoretically has a bandwidth of hundreds of megabytes, so that the requirement of high-speed movement of high-speed rails can be met, and the requirement of high-speed internet access can be realized.
However, in practice, the LTE network is different from the fixed network, and the bandwidth of the fixed network can be approximately regarded as a fixed value, such as a 100M ethernet interface, and the bandwidth does not change greatly due to the change of time, which is basically 100Mbps (megabits per second). The LTE network bandwidth is not fixed and is strongly related to the location, and even the LTE network bandwidth of the same operator may be greatly different when the location is different.
How to test the actual bandwidth of the LTE network on the high-speed rail line becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a link bandwidth testing method and device, which are used for realizing automatic testing of link bandwidth on a high-speed rail.
According to a first aspect of the embodiments of the present invention, there is provided a link bandwidth measurement method applied to a vehicle-mounted router, the method including:
step A, sending a link bandwidth test request aiming at the target test network to a flow tester, wherein the link bandwidth test request carries a message sending rate and a target Internet Protocol (IP) address, corresponding to an uplink interface of the target test network, on the vehicle-mounted router, so that the flow tester sends a preset number of test messages to the target IP address according to the message sending rate;
step B, receiving the test message sent by the flow tester, and judging whether the current test passes according to the receiving condition of the test message;
step C, updating the message sending rate aiming at the link bandwidth test of the target test network by using a dichotomy according to the judgment result, and turning to the step A until a preset dichotomy test ending condition is reached;
and D, when the service cell identification of the target test network is updated, determining the link bandwidth of the target test network in the last service cell according to the test result of the dichotomy test executed in the last service cell, and restarting the link bandwidth test, and turning to the step A.
According to a second aspect of the embodiments of the present invention, there is provided a link bandwidth testing apparatus, applied to a vehicle-mounted router, the apparatus including:
a sending unit, configured to send a link bandwidth test request for the target test network to a traffic tester, where the link bandwidth test request carries a message sending rate determined by the rate control unit and a target internet protocol IP address, corresponding to an uplink interface of the target test network, on the vehicle-mounted router, so that the traffic tester sends a preset number of test messages to the target IP address according to the message sending rate;
a receiving unit, configured to receive a test packet sent by the traffic tester;
the judging unit is used for judging whether the current test passes according to the receiving condition of the test message of the receiving unit;
the rate control unit is used for updating the message sending rate of the link bandwidth test aiming at the target test network by using the bisection method according to the judgment result of the judgment unit when the preset bisection method test ending condition is not reached;
and the determining unit is used for determining the link bandwidth of the last serving cell of the target test network according to the test result of the dichotomy test executed in the last serving cell when the serving cell identifier of the target test network is updated, and determining to restart the link bandwidth test.
By applying the embodiment of the invention, for any service cell of the target test network, the vehicular router determines the message sending rate by using the dichotomy, the flow tester sends the test messages with the preset number according to the message sending rate determined by the vehicular router for testing, and further, the vehicular router determines the link bandwidth of the target test network in the service cell according to the test result of the dichotomy test, thereby realizing the automatic test of the link bandwidth on the high-speed rail.
Drawings
Fig. 1 is a schematic flowchart of a link bandwidth testing method according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a specific application scenario provided in the embodiment of the present invention;
fig. 3 is a schematic flowchart of a link bandwidth test according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a link bandwidth testing apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions in the embodiments of the present invention better understood and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, a schematic flow chart of a link bandwidth testing method according to an embodiment of the present invention is provided, where the link bandwidth testing method may be applied to an on-vehicle router, and as shown in fig. 1, the link bandwidth testing method may include the following steps:
In the embodiment of the present invention, the target test network does not refer to a fixed network, but may refer to any one or more operator networks supported by the vehicle-mounted router, such as one or more of a mobile (operator) LTE network, a universal LTE network, a telecommunication LTE network, a mobile 3G network, a universal 3G network, or a telecommunication 3G network, for example, the target test network may be a telecommunication LTE network, and certainly, the target test network may also be a telecommunication LTE network and a mobile 3G network, the number of the test networks is not limited, and the following description of the embodiment of the present invention is not repeated.
In the embodiment of the invention, considering the characteristics of unstable bandwidth and strong correlation with places of a mobile network (namely, a non-fixed network), for any target test network, the vehicle-mounted router can respectively test the link bandwidth of the target test network in each service cell of the target test network so as to improve the test accuracy of the link bandwidth.
In the embodiment of the invention, when the link bandwidth is tested, the vehicle-mounted router determines the message sending rate for testing the link bandwidth, so that the flow tester sends the test message according to the message sending rate determined by the vehicle-mounted router, and further, the vehicle-mounted router determines the link bandwidth according to the receiving condition of the test message.
Correspondingly, in the embodiment of the invention, when the vehicle-mounted router needs to perform the link bandwidth test on the target test network, the vehicle-mounted router needs to determine the message sending rate for performing the link bandwidth test.
For the target test network, before the vehicle-mounted router starts to perform the link bandwidth test, the vehicle-mounted router may set the message sending rate of the link bandwidth test of the target test network to the preset initial message sending rate.
The initial message sending rate can be set according to a theoretical bandwidth value of the target test network.
For example, assuming that the theoretical bandwidth value of the target test network is 100Mbps, the corresponding initial packet transmission rate may be 100Mbps (the data size of the test packet transmitted per second is 100Mb, and if the packet length of the test packet is L bytes (Byte), the initial packet transmission rate of 100Mbps is equivalent to transmitting 100M/(8 × L) test packets per second).
The message length of the test message may be reported to the traffic tester in a link bandwidth test request carried by the vehicle-mounted router, or determined by negotiation in advance between the vehicle-mounted router and the traffic tester, or directly configured in the traffic tester by an administrator.
In the embodiment of the invention, the vehicle-mounted router can determine to start the link bandwidth test when being connected to the target test network and detecting that the current moving speed of the train exceeds a preset threshold (such as 20km/h, 30km/h and the like) or when detecting that the service cell identifier of the target test network is updated.
In the embodiment of the invention, after the vehicle-mounted router determines the message sending rate of the link bandwidth test aiming at the target test network, the vehicle-mounted router can send the link bandwidth test request aiming at the target test network to the flow tester.
The link bandwidth test request may carry a message sending rate and an IP (Internet Protocol) address (referred to as a target IP address herein) of an uplink interface of the target test network on the vehicle-mounted router.
When the traffic tester receives a link bandwidth test request sent by the vehicle-mounted router, the traffic tester can acquire a message sending rate and a target IP address carried in the link bandwidth test request, and send a test message to the target IP address according to the message sending rate.
The number of the test packets sent by the traffic tester each time the traffic tester receives the link bandwidth test request may be a fixed value (may be determined by negotiation between the vehicle-mounted router and the traffic tester in advance, or may be set by an administrator in advance and configured in the traffic tester), for example, 10000 or 20000.
In an alternative embodiment, the target test network may include a main test network and one or more auxiliary test networks.
In this embodiment, the on-board router may perform parallel testing on the link bandwidths of multiple networks, so as to obtain the link bandwidths of the multiple networks at the same time and the same place, so as to provide data support for load balancing of the multiple links.
In this embodiment, the primary test network may be any network supported by the on-board router, and the auxiliary test network may be any network supported by the on-board router other than the primary test network.
For example, assuming that the in-vehicle router supports a mobile LTE network, a mobile 3G network, a unicom LTE network, a unicom 3G network, a telecommunication LTE network, and a telecommunication 3G network, when the primary test network is the mobile LTE network, the auxiliary test network may be one or more of the remaining networks; similarly, when the primary test network is a connected LTE network, the auxiliary test network may also be one or more of the remaining networks.
Due to the wide application of LTE networks at present, it is preferred that the primary test network is an LTE network.
Accordingly, when the target test network includes a main test network and one or more auxiliary test networks, the sending the link bandwidth test request for the target test network to the traffic tester may include:
respectively sending a first link bandwidth test request aiming at a main test network and a second link bandwidth test request aiming at an auxiliary test network to a flow tester; the first link bandwidth test request carries a first message sending rate and a first target IP address of a main test network corresponding to the vehicle-mounted router; the second link bandwidth test request carries a second message sending rate and a second target IP address of the auxiliary test network corresponding to the vehicle-mounted router.
In this embodiment, before the on-board router starts to perform the link bandwidth test, the on-board router may set a first message sending rate for the link bandwidth test of the primary test network to a preset first initial message sending rate, and set a second message sending rate for the link bandwidth test of the secondary test network to a preset second initial message sending rate, respectively.
The first initial message sending rate and the second initial message sending rate may be the same or different. In addition, when there are multiple auxiliary test networks, the second initial message sending rates of the link bandwidth tests for different auxiliary test networks may be the same or different.
It should be noted that, in the embodiment of the present invention, when the target test network includes a main test network and one or more auxiliary test networks, the on-board router needs to separately test the link bandwidths of the test networks in the service cells of the main test network, that is, the service cells of the main test network are taken as benchmarks for dividing the test granularity.
It should be noted that the serving cells of the main test network in the above embodiment of the present invention are all merged cells, for example, in an optional implementation, the merged cells are formed by merging 12 rrus (radio Remote units). The specific implementation of the merging cell may refer to the related description in the related protocol, and the embodiment of the present invention is not described herein again.
In this embodiment, when the on-board router needs to perform a link bandwidth test on the main test network and the auxiliary test network respectively, and determines a first packet sending rate for the link bandwidth test of the main test network and a second packet sending rate for the link bandwidth test of the auxiliary test network, the on-board router may send a first link bandwidth test request for the main test network and a second link bandwidth test request for the auxiliary test network to the traffic tester respectively.
The first link bandwidth test request carries a first message sending rate and a target IP address (referred to as a first target IP address herein) of an uplink interface of the main test network corresponding to the vehicle-mounted router; the second link bandwidth test request carries a second packet sending rate and a target IP address (referred to as a second target IP address herein) of an uplink interface of the main test network corresponding to the vehicle-mounted router.
When receiving the first test request and the second test request, the traffic tester may send a preset number of messages to the first target IP address according to the first message sending rate, and send a preset number of messages to the second target IP address according to the second message sending rate, respectively.
And 102, receiving a test message sent by the flow tester, and judging whether the current test passes according to a receiving request of the test message.
In the embodiment of the present invention, after the vehicle-mounted router sends the link bandwidth test request to the traffic tester, the vehicle-mounted router may receive the test packet sent by the traffic tester, count the packet reception request, for example, packet loss rate, average delay, and the like, and determine whether the current test passes or not according to the statistical result.
Correspondingly, in the embodiment of the invention, when the flow tester sends the test message to the vehicle-mounted router, the flow tester can carry the message serial number or/and the timestamp information; furthermore, when the vehicle-mounted router receives the test message, the packet loss rate or/and the average time delay of the received message can be counted according to the message serial number or/and the timestamp information carried in the message, and whether the current test is passed or not is judged according to the packet loss rate or/and the average time delay.
For example, a packet loss rate threshold or/and an average delay threshold may be preset, and when the vehicle-mounted router determines that the packet loss rate of the test packet exceeds the preset packet loss rate threshold, or/and the average delay exceeds the preset average delay threshold, it is determined that the current test does not pass; otherwise, determining that the current test is passed.
It should be noted that, in the embodiment of the present invention, when the test packet carries the packet serial number information, the vehicle-mounted router may further count the disorder condition of the test packet according to the packet serial number information carried in the received test packet, and use the disorder condition of the test packet as a determination parameter for determining whether the current test passes, which is not described herein again in detail.
In the embodiment of the invention, because the vehicle-mounted router needs to respectively carry out link bandwidth test on the target test network in different service cells, when the traffic tester sends the test message to the vehicle-mounted router, the message serial numbers can be accumulated according to the service cells. That is, for the test messages in the same service cell, the message serial numbers of the test messages are accumulated all the time; when the service cell of the vehicle-mounted router is updated, the message serial number of the test message is reset and accumulated again.
In order to achieve the purpose, a link bandwidth test request sent by the vehicle-mounted router to the network tester can also carry a test serial number, and the test serial number is determined with a service cell where the vehicle-mounted router is currently located; the test sequence numbers corresponding to the same service cell are the same, and the test sequence numbers corresponding to different service cells are different.
Correspondingly, when the traffic tester receives a link bandwidth test request sent by the vehicle-mounted router, whether the test serial number carried in the link bandwidth test request is updated or not can be judged, if not, the message serial number of the test message sent by the traffic tester to the vehicle-mounted router is continuously accumulated on the basis of the message serial number of the test message sent when the traffic tester responds to the link bandwidth test request last time; otherwise, when the test sequence number is updated, the flow tester can clear the message sequence number of the test message and start accumulation again.
It should be noted that, in the embodiment of the present invention, the message sequence numbers of the test messages sent by the traffic tester to the vehicle-mounted router may also be accumulated all the time without being affected by the serving cell in which the vehicle-mounted router is located. For example, if the number of test messages sent by the traffic tester each time the traffic tester receives a link bandwidth test request is 10000, the message serial number of the test message sent by the traffic tester in response to the first received link bandwidth test request may be 1 to 10000; the serial number of the test message sent by the traffic tester in response to the nth reception of the link bandwidth test request is 1+ (n-1) × 10000 to n × 10000, and specific implementation thereof is not described herein again.
In an optional implementation manner, when the target test network includes a main test network and one or more auxiliary test networks, and when the vehicle-mounted router receives a test packet sent by the traffic tester, the traffic tester may distinguish whether the test packet is a test packet for the main test network or a test packet for the auxiliary test network according to a destination IP address of the test packet, and count the reception conditions of the test packet for the main test network and the test packet for the auxiliary test network, and further determine whether the current test passes or not according to a statistical result.
For specific processing of the traffic tester for sending the test packet of the main test network (or sending the test packet of the auxiliary test network), and for receiving statistics of the test packet of the main test network (or receiving statistics of the test packet of the auxiliary test network) by the vehicle-mounted router, reference may be made to the related description in the above method embodiment, which is not described herein again in the embodiments of the present invention.
It should be noted that, in the embodiment of the present invention, when the vehicle-mounted router tests link bandwidths of different networks, interfaces (uplink interfaces) for receiving test messages are also different, so that, when the vehicle-mounted router tests multiple networks at the same time, the vehicle-mounted router may also distinguish test messages for different networks according to the interfaces of the test messages, and detailed implementation thereof is not described herein.
And 103, updating the message sending rate aiming at the link bandwidth test of the target test network by using the dichotomy according to the judgment result, and turning to the step 101 until a preset dichotomy test ending condition is reached.
In the embodiment of the invention, after judging whether the current test is passed or not according to the received test message, the vehicle-mounted router can also update the message sending rate by using the dichotomy, and perform the link bandwidth test again by using the updated message sending rate.
For example, assuming that the initial message sending rate is 100Mbps, if the link bandwidth test is not performed according to the message sending rate, the vehicle-mounted router may update the message sending rate to 50Mbps, and perform the link bandwidth test again according to the updated message sending rate; if the link bandwidth test still fails, updating the message sending rate to 25Mbps ((0+50)/2 ═ 25) and carrying out the link bandwidth test again according to the updated message sending rate; and if the link bandwidth test is passed (the message sending rate is 50Mbps), updating the message sending rate to 75Mbps (50+100)/2 is 75), and carrying out the link bandwidth test again according to the updated message sending rate, namely, the vehicle-mounted router calculates the latest message sending rate by using a bisection method between 0 and the message sending rate to the initial message sending rate until a preset bisection method test ending condition is reached.
The bisection test ending condition may be set according to an actual scenario (for example, the specific setting manner may refer to related implementation in an existing bisection algorithm), for example, when a difference between a latest determined message sending rate and a last determined message sending rate is less than or equal to a preset threshold; or, the number of times of updating the message sending rate exceeds a preset threshold, and the like, and the specific implementation thereof is not described herein.
In the embodiment of the present invention, after the vehicle-mounted router updates the message sending rate, the link bandwidth test for the target test network may be performed again according to the manners described in steps 101 to 102 until a preset dichotomy test end condition is reached.
In the embodiment of the invention, when the vehicle-mounted router determines that the preset dichotomy test ending condition is reached but the service cell identifier of the target test network is not updated, the vehicle-mounted router can store the test result of the dichotomy test in the current service cell, and when the service cell identifier of the target test network is updated, the link bandwidth of the last service cell of the target test network is determined according to the stored test result of the last service cell.
In an optional implementation manner, when the target test network includes a main test network and one or more auxiliary test networks, the vehicle-mounted router may update the first packet sending rate and the second packet sending rate respectively according to the manners described in the foregoing embodiments, and perform the link bandwidth test for the main test network and the link bandwidth test for the auxiliary test network respectively again, and specific implementation thereof is not described herein again.
It should be noted that, when the target test network includes a main test network and one or more auxiliary test networks, the link bandwidth test for the main test network and the link bandwidth test for the auxiliary test networks may be performed concurrently without affecting each other (i.e., the specific operations of determining the message sending rate, sending the test request to the traffic tester, receiving the test message, updating the message sending rate, determining the link bandwidth, etc. do not affect each other), but when the serving cell of the main test network is updated, the auxiliary test network also needs to end the previous round of test, and start a new round of test in the new serving cell.
In the embodiment of the invention, when the vehicle-mounted router detects that the Cell identification (Cell ID) of the target test network is updated, the vehicle-mounted router can determine that the train enters a new service Cell of the target test network, and at the moment, on one hand, the vehicle-mounted router can determine the link bandwidth of the target test network in the last service Cell according to the test result of the dichotomy test executed in the last service Cell.
For example, the vehicular router may use the message sending rate when the last test passes in the dichotomy test process as the link bandwidth.
On the other hand, the on-board router may restart the link bandwidth test to test the link bandwidth of the target test network in the new serving cell.
For specific implementation of the vehicle-mounted router performing the link bandwidth test on the target test network in the new serving cell, reference may be made to the related description in steps 101 to 104, and details of the embodiment of the present invention are not described herein again.
In an alternative embodiment, when the target test network includes a main test network and one or more auxiliary test networks, the step 104 may include:
when the service cell identifier of the main test network is updated, the link bandwidth of the main test network in the last service cell of the main test network and the link bandwidth of the auxiliary test network in the last service cell of the main test network are respectively determined according to the test result of the dichotomy test performed in the last service cell, and the link bandwidth test is performed on the main test network and the auxiliary test network in the new service cell, and the step 101 is performed.
In this embodiment, when the target test network includes the main test network and the auxiliary test network, the service cell of the main test network is required to be used as a benchmark for dividing the test granularity, that is, the vehicle-mounted router needs to test the link bandwidths of the main test network and the auxiliary test network in each service cell of the main test network, respectively, and when the service cell identifier of the main test network is updated, the link bandwidth test is performed on the main test network and the auxiliary test network in the new service cell to determine the link bandwidths of the main test network and the auxiliary test network in the new service cell of the main test network.
Further, in an optional implementation manner, before the step 104, the method may further include:
and when the link bandwidth test is started and the service cell identification of the target test network is not updated, circularly executing the dichotomy test until the service cell identification of the target test network is updated.
Accordingly, the determining the link bandwidth of the target test network in the previous serving cell according to the test result of the binary test performed in the previous serving cell may include:
and determining the link bandwidth of the target test network in the last service cell according to the average value of the test results of the dichotomy test performed in the last service cell.
In this embodiment, in order to improve the accuracy of the link bandwidth of the determined target test network in each serving cell, for any serving cell of the target test network to which the vehicle-mounted router accesses, the vehicle-mounted router may cyclically perform the dichotomy test in the serving cell until the serving cell identifier of the target test network is updated. That is, for the same serving cell, the on-board router may perform a plurality of link bandwidth tests for the target test network.
In this embodiment, in the process of the vehicle-mounted router performing the link bandwidth test for the target network, the vehicle-mounted router needs to determine whether the serving cell identifier of the target test network is updated, and if not, the vehicle-mounted router cyclically performs the bisection test in the manner described in the above method embodiment; and if so, stopping the link bandwidth test aiming at the last service cell, and determining the link bandwidth of the target test network in the last service cell according to the average value of the test results of the dichotomy test executed in the last service cell.
For example, assuming that the vehicular router completes 5 dichotomy tests in the serving cell a in total and the test results are a1, a2, A3, a4 and a5, respectively, the vehicular router may determine the link bandwidth of the target test network in the serving cell a as (a1+ a2+ A3+ a4+ a 5)/5.
Further, in an optional implementation manner, before the step 101, the method may further include:
sending a registration request message to a flow tester so that the flow tester stores the key test parameters, and recording the link bandwidth of a target test network corresponding to the key test parameters when receiving the link bandwidth of the target test network reported by a vehicle-mounted router;
and receiving a registration response message sent by the flow tester.
In this embodiment, before performing a link bandwidth test, the vehicle-mounted router may register with the traffic tester, report key test parameters, such as a device identifier (e.g., a device serial number) of the vehicle-mounted router, LTE Module information included in the vehicle-mounted router, SIM (Subscriber identity Module) card information, network information used by each SIM card, and the like, to the traffic tester through a registration message, and store the key test parameters of the vehicle-mounted router by the traffic tester.
The key test information of the vehicle-mounted router stored by the flow tester can be shown in table 1:
TABLE 1
| Equipment serial | Slot number | 1 | IMEI | IMSI | Network | Slot number | 2 | … |
The Device serial number (Device ID) is serial number information of each vehicle-mounted router and is a unique identifier of the vehicle-mounted router; the slot number is a slot mark of the LTE module on the vehicle-mounted router, for example, 1/0, and represents a slot 1 port; the IMEI (International Mobile Equipment Identity) is the unique identifier of the LTE module; the IMSI (International Mobile Subscriber identity Number) is a unique identifier of the SIM card.
Based on the key test information, the traffic tester can acquire the network type corresponding to each slot position port of the vehicle-mounted router. The function of sending the slot number and the IMEI is to prevent the LTE module from being replaced by the slot, and the traffic tester still records the link bandwidth result according to the corresponding relation between the previously recorded slot number and the IMEI.
It should be noted that, in the embodiment of the present invention, when the vehicle-mounted router changes the LTE module or/and the SIM card, the updated LTE module information or/and SIM card information needs to be reported to the traffic tester through the registration request message.
In this embodiment, after the in-vehicle router determines the link bandwidth of the target test network in a certain serving cell, the link bandwidth of the target test network in the serving cell may be reported to the traffic tester; after the traffic tester receives the link bandwidth reported by the vehicle-mounted router, the traffic tester can record the link bandwidth of the target test network of the vehicle-mounted router in the service cell corresponding to the key test parameters of the vehicle-mounted router stored by the traffic tester.
Correspondingly, when the target test network includes a main test network and one or more auxiliary test networks, the vehicle-mounted router may report the link bandwidths of the main test network and the auxiliary test networks in the service cell of the main test network to the traffic tester at the same time, and record the link bandwidths of the main test network and the auxiliary test networks in the service cell of the main test network by using the key test parameters of the vehicle-mounted router corresponding to the vehicle-mounted router, and further, the traffic tester may perform load balancing on the data traffic of the vehicle-mounted router on links corresponding to different networks according to the link bandwidths of different networks of the vehicle-mounted router in each service cell recorded by the traffic tester, for example, the load balancing is implemented by a weighted polling algorithm or a bandwidth proportion algorithm, which is not described herein.
It should be noted that, in the embodiment of the present invention, when the vehicle-mounted router reports the link bandwidth of the target test network in the current serving cell to the traffic tester, the vehicle-mounted router may also report the statistical parameters, such as the message length, average delay, packet loss rate, and the like, of the test packet of the target test network in the current serving cell to the traffic tester, and the traffic tester corresponds to the key test parameter record of the vehicle-mounted router to provide data support for subsequent load balancing.
In order to enable those skilled in the art to better understand the technical solution provided by the embodiment of the present invention, the following describes the technical solution provided by the embodiment of the present invention in detail with reference to a specific application scenario.
Referring to fig. 2, a schematic diagram of a specific application scenario provided by an embodiment of the present invention is shown, in which it is assumed that the target test network includes a main test network (assumed as network a) and an auxiliary test network (assumed as network B), and as shown in fig. 2, the high-speed railway sequentially passes through a serving Cell 1(Cell ID is Cell 1), a serving Cell 2(Cell ID is Cell 2), and a serving Cell 3(Cell ID is Cell 3) … of the network a.
When a high-speed train runs along the high-speed rail line shown in fig. 2, the specific implementation flow of the link bandwidth testing scheme provided by the embodiment of the invention is as follows:
1. the vehicle-mounted router sends a discovery request message to the flow tester according to the pre-configured IP address of the flow tester; after receiving the discovery request message, the flow tester responds a discovery response message to the vehicle-mounted router according to the source IP address of the message;
2. the vehicular router sends a registration request message to the flow tester, wherein the registration request message carries key test parameters such as the equipment serial number of the vehicular router, LTE module information included by the vehicular router, SIM card information included by the vehicular router, network information used by each SIM card and the like; after receiving the registration request message, the flow tester stores key test information of the vehicle-mounted router and responds a registration response message to the vehicle-mounted router;
3. when the vehicle-mounted router accesses a service cell 1 of a network A, the vehicle-mounted router starts to perform link bandwidth test;
4. the vehicle-mounted router sets a first message sending rate aiming at the link bandwidth test of the network A as a first initial message sending rate, and sets a second message sending rate aiming at the link bandwidth test of the network B as a second initial message sending power;
in this embodiment, it is assumed that the first initial packet transmission rate is 100Mbps, and the second initial packet transmission rate is 20 Mbps;
5. the vehicle-mounted router sends a first link bandwidth test request aiming at a network A and a second link bandwidth test request aiming at a network B to the flow tester; the first link bandwidth test request carries a test serial number, a first message sending rate and an IP address of a network A corresponding to the vehicle-mounted router; the second link bandwidth test request carries a test serial number, a second message sending rate and an IP address of a network B corresponding to the vehicle-mounted router; wherein, the test sequence number is determined according to a service Cell identification (Cell ID) of the network A;
in this embodiment, it is assumed that the IP address of the network a corresponding to the on-board router is IP1, and the IP address of the network B corresponding to the on-board router is IP 2;
6. the traffic tester receives the first link bandwidth test request and the second link bandwidth test request, and respectively sends a preset number of test messages to the IP1 according to the first message sending rate and sends a preset number of test messages to the IP2 according to the second message sending rate;
when the traffic tester receives a first link bandwidth test request (or a second link bandwidth test request), judging whether a test sequence number carried in the first link bandwidth test request (or the second link bandwidth test request) is consistent with a test sequence number carried in a first link bandwidth test request (or a second link bandwidth test request) received last time; if the test messages are consistent, the message serial numbers of the test messages continue to be accumulated on the basis of the test message sent last time; otherwise, resetting the message serial number of the test message and accumulating again; the test message sequence numbers in the test message sent by the flow tester to the IP1 and the test message sent to the IP2 are not related to each other;
in this embodiment, it is assumed that the preset number is 10000, and the message length of the test message is 1500 bytes;
7. the vehicle-mounted router receives the test messages, respectively counts the packet loss rate and the average time delay of the test messages (the test messages with the target IP address of IP 1) aiming at the network A and the packet loss rate and the average time delay of the test messages (the test messages with the target IP address of IP 2) aiming at the network B, and respectively judges whether the current tests aiming at the network A and the network B pass or not;
8. the vehicle-mounted router updates the first message sending rate and the second message sending rate by using the dichotomy according to the judgment result, and goes to the step 5 until the preset dichotomy test is finished or the service cell identifier of the network A is updated;
9. when the service cell identification of the network A is not updated, the vehicle-mounted router circularly executes dichotomy test aiming at the link bandwidth of the network A and the network B in the current service cell;
10. when the serving Cell identifier of network a is updated (for example, Cell 1 is updated to Cell 2), the vehicle-mounted router ends the dichotomy test for the link bandwidth of network a and network B in the current serving Cell, starts to perform the link bandwidth test for network a and network B in the new serving Cell, and goes to step 4; the specific implementation process can be seen in fig. 3;
in this embodiment, taking an example that the serving Cell identifier of the network a is updated from Cell 1 to Cell 2, when the vehicle-mounted router detects that the serving Cell identifier of the network a is updated to Cell 2, on one hand, the vehicle-mounted router needs to end the link bandwidth test for the network a and the network B in the serving Cell 1, and determine the link bandwidths of the network a and the network B in the serving Cell 1 according to an average value of test results of the bisection test performed in the serving Cell 1 and completed for the network a and the network B, respectively;
assuming that the vehicular router performs 5 dichotomy tests for the network a in the serving cell 1, the test results are a1, a2, A3, a4 and a5 respectively; performing 3 dichotomy tests for the network B, with the test results being B1, B2, and B3, respectively, the in-vehicle router may determine (a1+ a2+ A3+ a4+ a5)/5 as the link bandwidth of the network a in the serving cell 1, and (B1+ B2+ B3)/3 as the link bandwidth of the network B in the serving cell 1;
on the other hand, the vehicle-mounted router starts testing the link bandwidth of the network a and the network B in the serving cell 2, and the specific testing mode may refer to steps 3 to 8, which is not described herein again in the embodiments of the present invention.
Taking the network a as a mobile LTE network and the network B as a mobile 3G network as an example, the test results of the link bandwidth test of the network a and the network B in each serving cell (taking a specific address as an example in the table) of the network a, which are determined by the vehicle-mounted router, may be as shown in table 2:
TABLE 2
11. After determining the link bandwidth of the network A and the network B in each service cell of the network A, the vehicle-mounted router can report the link bandwidth to the flow tester, the flow tester records the link bandwidth of the network A and the network B in each service cell of the network A corresponding to the key test parameters of the vehicle-mounted router, and load balancing is carried out on the data flow of the vehicle-mounted router on the links corresponding to different networks according to the information recorded by the vehicle-mounted router.
For example, taking the link bandwidth shown in table 2 as an example, assuming that a certain high-speed train operates in a Cell with a Cell ID of 25839885, as can be seen from table 2, the bandwidth of the mobile LTE network of the high-speed train is 70Mbps, and the bandwidth of the mobile 3G network is 14Mbps, when the data traffic on the high-speed train is large, the data traffic may be allocated to the mobile LTE network and the mobile 3G network according to a ratio of 5:1(70:14 is 5:1), so as to achieve load balancing of the data traffic on links corresponding to different networks.
It should be noted that, in the embodiment of the present invention, when the vehicle-mounted router performs a link bandwidth test on a serving cell for the network a and the network B, if a link of the network a fails, the vehicle-mounted router may continue the round of dichotomy test until the link of the network a is recovered, and determine whether to start a new round of dichotomy test in a new serving cell according to whether the serving cell identifier is updated.
Taking the scenario shown in fig. 2 as an example, assuming that when the high-speed rail train runs to the point D of the serving cell 3, the link of the network a fails, and the link of the network a recovers to be normal until the high-speed rail train runs to the point F of the serving cell 4, when the high-speed rail train runs to the point E, although the vehicle-mounted router performs the coverage of the serving cell 4, the vehicle-mounted router cannot detect the update of the serving cell identifier of the network a due to the link failure of the network a, so that the vehicle-mounted router will continue to perform the test on the link bandwidths of the network a and the network B in the serving cell 3, and when the high-speed rail train runs to the point F, the link of the network a recovers to be normal, at this time, the vehicle-mounted router detects the update of the serving cell identifier of the network a, and the vehicle-mounted router ends the test on the link bandwidths of the network a and the network B in the serving cell 3 of the network a, and begins to perform link bandwidth tests for network a and network B at the serving cell 4 of network B.
As can be seen from the above description, in the technical solution provided in the embodiment of the present invention, for any service cell of the target test network, the vehicular router determines the message sending rate by using the bisection method, the traffic tester sends a preset number of test messages for testing according to the message sending rate determined by the vehicular router, and further, the vehicular router determines the link bandwidth of the target test network in the service cell according to the test result of the bisection method test, so as to implement automatic testing of the link bandwidth on the high-speed rail.
Referring to fig. 4, a schematic structural diagram of a link bandwidth testing apparatus according to an embodiment of the present invention is provided, where the apparatus may be applied to a vehicle-mounted router in the foregoing method embodiment, and as shown in fig. 4, the apparatus may include:
a sending unit 410, configured to send a link bandwidth test request for the target test network to a traffic tester, where the link bandwidth test request carries the packet sending rate determined by the rate control unit and a target internet protocol IP address, corresponding to an uplink interface of the target test network, on the vehicle-mounted router, so that the traffic tester sends a preset number of test packets to the target IP address according to the packet sending rate;
a receiving unit 420, configured to receive a test packet sent by the traffic tester;
a determining unit 430, configured to determine whether the current test passes according to the receiving condition of the test packet of the receiving unit 420;
the rate control unit 440 is further configured to update, according to the determination result of the determination unit, a packet sending rate for the link bandwidth test of the target test network by using the bisection method when a preset bisection test end condition is not met;
a determining unit 450, configured to determine, when the serving cell identifier of the target test network is updated, a link bandwidth of the previous serving cell of the target test network according to a test result of the binary test performed in the previous serving cell, and determine to restart the link bandwidth test.
In an optional embodiment, the determining unit 450 is further configured to determine to cyclically perform the bisection test until the serving cell identifier of the target test network is updated, when the link bandwidth test is started and the serving cell identifier of the target test network is not updated;
the determining unit 450 is further configured to determine the link bandwidth of the target test network in the previous serving cell according to an average value of the test results of the binary test performed in the previous serving cell.
In an optional embodiment, the determining unit 430 is specifically configured to count a packet loss rate or/and an average time delay of the test packet received by the vehicle-mounted router; when the packet loss rate exceeds a preset packet loss rate threshold value, or/and the average time delay exceeds a preset average time delay threshold value, judging that the current test does not pass; otherwise, judging that the current test is passed.
In an alternative embodiment, the target test network comprises a main test network and one or more auxiliary test networks;
the sending unit 410 is specifically configured to send a first link bandwidth test request for the main test network and a second link bandwidth test request for the auxiliary test network to the traffic tester, respectively; the first link bandwidth test request carries a first message sending rate and a first target IP address, corresponding to an uplink interface of the main test network, on the vehicle-mounted router; the second link bandwidth test request carries a second message sending rate and a second target IP address, corresponding to an uplink interface of the auxiliary test network, on the vehicle-mounted router;
the determining unit 450 is specifically configured to, when the serving cell identifier of the main test network is updated, respectively determine, according to a test result of the binary test performed in the previous serving cell, a link bandwidth of the main test network in the previous serving cell of the main test network and a link bandwidth of the auxiliary test network in the previous serving cell of the main test network, and determine that a link bandwidth test is performed on the main test network and the auxiliary test network in a new serving cell.
In an optional embodiment, the sending unit 410 is further configured to send a registration request message to a traffic tester, where the registration request message carries a key test parameter, so that the traffic tester stores the key test parameter, and when receiving a link bandwidth of a target test network reported by the vehicle-mounted router, records the link bandwidth of the target test network corresponding to the key test parameter;
the receiving unit 420 is further configured to receive a registration response message sent by the traffic tester.
The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the invention. One of ordinary skill in the art can understand and implement it without inventive effort.
As can be seen from the above embodiments, for any service cell of the target test network, the vehicular router determines the message sending rate by using the bisection method, the traffic tester sends a preset number of test messages for testing according to the message sending rate determined by the vehicular router, and further, the vehicular router determines the link bandwidth of the target test network in the service cell according to the test result of the bisection method test, so as to implement automatic testing of the link bandwidth on the high-speed rail.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A link bandwidth testing method is applied to a vehicle-mounted router and is characterized by comprising the following steps:
step A, sending a link bandwidth test request aiming at a target test network to a flow tester, wherein the link bandwidth test request carries a message sending rate and a target Internet Protocol (IP) address, corresponding to an uplink interface of the target test network, on the vehicle-mounted router, so that the flow tester sends a preset number of test messages to the target IP address according to the message sending rate;
step B, receiving the test message sent by the flow tester, and judging whether the current test passes according to the receiving condition of the test message;
step C, updating the message sending rate aiming at the link bandwidth test of the target test network by using a dichotomy according to the judgment result, and turning to the step A until a preset dichotomy test ending condition is reached;
and D, when the service cell identification of the target test network is updated, determining the link bandwidth of the target test network in the last service cell according to the test result of the dichotomy test executed in the last service cell, and restarting the link bandwidth test, and turning to the step A.
2. The method of claim 1, wherein step D is preceded by:
when the link bandwidth test is started and the service cell identification of the target test network is not updated, circularly executing the dichotomy test until the service cell identification of the target test network is updated;
the determining the link bandwidth of the target test network in the previous serving cell according to the test result of the dichotomy test performed in the previous serving cell includes:
and determining the link bandwidth of the target test network in the last service cell according to the average value of the test results of the dichotomy test performed in the last service cell.
3. The method according to claim 1, wherein the determining whether the current test passes according to the receiving condition of the test packet comprises:
counting the packet loss rate or/and the average time delay of the test message received by the vehicle-mounted router;
when the packet loss rate exceeds a preset packet loss rate threshold value, or/and the average time delay exceeds a preset average time delay threshold value, judging that the current test does not pass;
otherwise, judging that the current test is passed.
4. The method of claim 1, wherein the target test network comprises a primary test network and one or more secondary test networks;
the step A comprises the following steps:
respectively sending a first link bandwidth test request aiming at the main test network and a second link bandwidth test request aiming at the auxiliary test network to the traffic tester; the first link bandwidth test request carries a first message sending rate and a first target IP address of an uplink interface of the main test network corresponding to the vehicle-mounted router; the second link bandwidth test request carries a second message sending rate and a second target IP address of an uplink interface of the auxiliary test network corresponding to the vehicle-mounted router;
the step D comprises the following steps:
when the service cell identifier of the main test network is updated, respectively determining the link bandwidth of the main test network in the last service cell of the main test network and the link bandwidth of the auxiliary test network in the last service cell of the main test network according to the test result of the dichotomy test executed in the last service cell, determining that the link bandwidth test is performed on the main test network and the auxiliary test network in the new service cell, and turning to the step A.
5. The method according to any one of claims 1 to 4, wherein step A is preceded by:
sending a registration request message to a traffic tester, wherein the registration request message carries key test parameters, so that the traffic tester stores the key test parameters, and when receiving the link bandwidth of a target test network reported by the vehicle-mounted router, recording the link bandwidth of the target test network corresponding to the key test parameters;
and receiving a registration response message sent by the flow tester.
6. A link bandwidth testing device applied to a vehicle-mounted router is characterized by comprising:
a sending unit, configured to send a link bandwidth test request for a target test network to a traffic tester, where the link bandwidth test request carries a message sending rate determined by a rate control unit and a target internet protocol IP address, corresponding to an uplink interface of the target test network, on the vehicle-mounted router, so that the traffic tester sends a preset number of test messages to the target IP address according to the message sending rate;
a receiving unit, configured to receive a test packet sent by the traffic tester;
the judging unit is used for judging whether the current test passes according to the receiving condition of the test message of the receiving unit;
the rate control unit is used for updating the message sending rate of the link bandwidth test aiming at the target test network by using the bisection method according to the judgment result of the judgment unit when the preset bisection method test ending condition is not reached;
and the determining unit is used for determining the link bandwidth of the last serving cell of the target test network according to the test result of the dichotomy test executed in the last serving cell when the serving cell identifier of the target test network is updated, and determining to restart the link bandwidth test.
7. The apparatus of claim 6,
the determining unit is further configured to determine to cyclically execute the bisection test until the serving cell identifier of the target test network is updated after the link bandwidth test is started and the serving cell identifier of the target test network is not updated;
the determining unit is further configured to determine the link bandwidth of the target test network in the previous serving cell according to an average value of test results of the binary test performed in the previous serving cell.
8. The apparatus of claim 6,
the judging unit is specifically configured to count a packet loss rate or/and an average time delay of the test packet received by the vehicle-mounted router; when the packet loss rate exceeds a preset packet loss rate threshold value, or/and the average time delay exceeds a preset average time delay threshold value, judging that the current test does not pass; otherwise, judging that the current test is passed.
9. The apparatus of claim 6, wherein the target test network comprises a primary test network and one or more secondary test networks;
the sending unit is specifically configured to send a first link bandwidth test request for the main test network and a second link bandwidth test request for the auxiliary test network to the traffic tester, respectively; the first link bandwidth test request carries a first message sending rate and a first target IP address of an uplink interface of the main test network corresponding to the vehicle-mounted router; the second link bandwidth test request carries a second message sending rate and a second target IP address of an uplink interface of the auxiliary test network corresponding to the vehicle-mounted router;
the determining unit is specifically configured to, when the serving cell identifier of the main test network is updated, respectively determine, according to a test result of a dichotomy test performed in a previous serving cell, a link bandwidth of the main test network in the previous serving cell of the main test network and a link bandwidth of the auxiliary test network in the previous serving cell of the main test network, and determine that a link bandwidth test is performed on the main test network and the auxiliary test network in a new serving cell.
10. The apparatus according to any one of claims 6 to 9,
the sending unit is further configured to send a registration request message to a traffic tester, where the registration request message carries a key test parameter, so that the traffic tester stores the key test parameter, and when receiving a link bandwidth of a target test network reported by the vehicle-mounted router, records the link bandwidth of the target test network corresponding to the key test parameter;
the receiving unit is further configured to receive a registration response message sent by the traffic tester.
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