Directional antenna mobile ad hoc network testing device and method

Abstract

The present invention relates to a directional antenna mobile self-organizing network test device, comprising a scene monitoring computer, a network switch, a multi-channel timing module and an intermediate frequency matrix switch; wherein the scene monitoring computer comprises a network monitoring software module, a matrix switch control software module and a timing control software module; the network switch connects the scene monitoring computer, the multi-channel timing module, the intermediate frequency matrix switch and the tested network management module and the modulation and demodulation module into a test network; the multi-channel timing module generates a multi-channel timing signal; the intermediate frequency matrix switch completes the closing / disconnecting action between ports under the triggering of the timing switch. The present invention also discloses a test method. The present invention adopts a semi-physical method to fully test the functions and performances of a multi-node network with high fidelity in a laboratory environment, improves the test efficiency, and has strong practicality and good application prospects.

Description

Technical Field

[0001] The present invention relates to the technical field of self-organizing network testing, and in particular to a directional antenna mobile self-organizing network testing device and method. Background Art

[0002] Directional antennas are antennas with obvious main lobes and side lobes in their directional patterns. Compared with omnidirectional antennas, they have higher directional gain, and have the advantages of achieving longer communication distances and stronger anti-interference capabilities. At the same time, when networking based on directional antennas, only nodes with mutually aligned main beams can complete wireless communication. On the basis of the time domain and frequency domain alignment required for omnidirectional antenna networking, the requirement for spatial domain alignment is added, and the networking control protocol is complex. In the network demonstration and design stage, simulation software can usually be used to simulate and analyze the networking control protocol; in the debugging and testing stage after the equipment is completed, the traditional debugging and testing methods based on physical objects require not only the network management module of the main equipment to be tested, but also the complete modulation and demodulation, transceiver channel, RF front end and antenna modules. The equipment, vehicle, site, power supply, personnel and other test requirements are high, and the test time is long. Especially when there are a large number of network nodes, it may be difficult to implement. In addition, under full physical conditions, it is difficult to traverse the network topology due to the limitations and influence of factors such as actual sites and roads, and there are also difficulties in the adequacy of the test.

[0003] The patent "Zheng Bowen, Wen Hai, Liu Yutao, etc. A synchronous beam selection device in a self-organizing network and a directional antenna self-organizing network: CN109347524A." proposes a synchronous beam selection device in a self-organizing network and a directional antenna self-organizing network, which is equipped with an omnidirectional antenna and multiple directional antennas. The omnidirectional coverage of the omnidirectional antenna solves the problem that the directional antenna self-organizing network cannot be normally networked when there is no external synchronization or north guidance information, and has the advantages of directional antenna networking. It does not involve the test method of the device, but it indirectly reflects the difficulties faced by the directional antenna self-organizing network test.

[0004] The literature "Zhang Wang, Peng Laixian, Xu Renhui, et al. Research on neighbor discovery algorithm for radar communication ad hoc network [J]. Communication Technology, 2017, 50(4): 701-706." proposed a high real-time directional neighbor discovery algorithm - radar scanning-based algorithm (RSBA) for directional transmission radar communication ad hoc network, and used OPNET to simulate and compare RSBA, sequential scanning algorithm (SBA) and random scanning algorithm (CRA), but did not involve the testing of networking functions and network performance.

[0005] In fact, there is currently a lack of reference information and methods on how to fully carry out networking function and network performance testing of directional antenna mobile self-organizing networks in laboratory environments. Summary of the invention

[0006] In order to solve the existing technical problems, the present invention provides a directional antenna mobile ad hoc network testing device and method.

[0007] The specific contents of the present invention are as follows: A directional antenna mobile self-organizing network test device includes a scene monitoring computer, a network switch, a multi-channel timing module and an intermediate frequency matrix switch;

[0008] Among them, the scene monitoring computer includes a network monitoring software module, a matrix switch control software module and a timing control software module; the network switch connects the scene monitoring computer, the multi-channel timing module, the intermediate frequency matrix switch and the tested network management module and the modulation and demodulation module into a test network; the multi-channel timing module generates multi-channel timing signals; the intermediate frequency matrix switch completes the closing / disconnecting action between ports under the triggering of the timing switch.

[0009] The network monitoring software module includes: editing and generating network frame period, time slot length, and parameters such as the number, ID, initial position, speed, movement direction and path of nodes, and sending them to the network management module under test to complete network parameter initialization; initiating various networking control commands and sending them to the corresponding network management module under test, including network establishment, network exit, late network entry, and establishment and removal of various business links; displaying the network topology based on the current position information of the node in the status message returned by the network management module of each node; simulating and generating various business data and sending them to each network management module, receiving business messages from the network management module and performing message statistics; the network monitoring software module supports the editing and saving of typical scenarios of the network under test.

[0010] Furthermore, the matrix switch control software module includes: initialization configuration of the matrix switch port; receiving the time slot message of each node network management module; making a joint judgment on the time slot number / time stamp, frequency point, and antenna pointing information in the message, judging the nodes with matching time slot, frequency point, and pointing point as connected, and judging the rest as disconnected; generating the corresponding matrix switch control message and sending it to the intermediate frequency matrix switch.

[0011] Furthermore, the timing control software module periodically generates the time offset of the timing signal of each time slot in each time frame relative to the reference second pulse according to the network time frame period and time slot length set by the network monitoring software module, and sends it to the multi-channel timing module.

[0012] Furthermore, a time frame period includes multiple time slots, and the time offset P of the timing signal of each time slot is i The time frame number N and the time frame period T, the time slot number n and the time slot length t, and the simulated time difference Δ of each node i Decide:

[0013] Pi =N×T+n×t+Δ i

[0014] Where N and n both start from 0.

[0015] Furthermore, the multi-channel timing module can use the clock source inside the multi-channel timing module, or directly use the external second pulse as a reference to generate multiple second pulse signals as the time reference of each node; receive the control message of the timing control software module, and generate multiple groups of timing signals according to the time offset set in the message, each group contains multiple timing signals, and the timing signal period can be set; the timing signals of different groups, in addition to being used as triggers for closing / opening the intermediate frequency matrix switch, can also be used to trigger the network management module and the modulation and demodulation module of the timing drive network with synchronization requirements; multiple timing signals in the same group are used to trigger the same module at different nodes; the timing relationship of the timing signals of different groups can be set; the time difference of different timing signals in the same group can be set.

[0016] Furthermore, the intermediate frequency matrix switch has multiple intermediate frequency I / O ports and multiple timing control ports. The network node IDs corresponding to the intermediate frequency and timing ports can be initialized and configured by the matrix switch control software module according to the actual connection; the matrix switch control message sent by the matrix switch control software module is received, and according to the connection relationship between the input and output ports in the control message, the switch closing / opening action is completed under the triggering of the timing signal generated by the multi-channel timing module, simulating the directional antenna beam alignment, and providing a closed loop for the intermediate frequency signal of each node modem; it supports one input port to be connected to multiple output ports at the same time, and multiple input ports to be connected to one output port at the same time.

[0017] The present invention also discloses a directional antenna mobile self-organizing network testing method, based on any of the above-mentioned testing devices, comprising the following steps:

[0018] S01: Connect the test device and the device under test;

[0019] S02: through the network monitoring software module, the time frame period and time slot length of the timing signal are set according to the network time frame period and time slot length of the network under test; the number, ID, initial position, speed, movement direction and path of the nodes are set and sent to the network management module under test to complete the network parameter initialization;

[0020] S03: According to the actual connection relationship between the intermediate frequency matrix switch and the modulation and demodulation module and the multi-channel timing module, the matrix switch control software module performs initialization configuration of the intermediate frequency matrix switch;

[0021] S04: The network monitoring software module selects a node to initiate a network building command;

[0022] S05: The matrix switch control software module receives the time slot control message generated by each network management module after receiving the network establishment command through the network switch, makes a joint judgment on the time slot number / time stamp, frequency point, and antenna pointing information in the message, generates a corresponding matrix switch control message, and sends the intermediate frequency matrix switch through the network.

[0023] S06: The intermediate frequency matrix switch receives the matrix switch control message, and completes the analysis of the corresponding relationship between the node ID of each time slot and the matrix switch port number in combination with the initialization configuration according to the actual connection situation, generates an on-off control table, and waits for the timing signal to trigger;

[0024] S07: The timing control software module calculates the time offset of the timing signal of each time slot in the current time frame relative to the reference second pulse according to the network time frame period and time slot length set by the network monitoring software module, generates a timing control message and sends it to the multi-channel timing module through the network;

[0025] S08: The multi-channel timing module receives the control message from the timing control software module and generates a multi-channel timing signal according to the time offset set in the message;

[0026] S09: When triggered by the timing signal, the intermediate frequency matrix switch completes the closing / opening action between the ports according to the on / off control table.

[0027] The present invention discloses a directional antenna mobile ad hoc network testing device and method based on intermediate frequency matrix switches. The device and method adopt a semi-physical approach to overcome the shortcomings of traditional full-physical testing, such as high supporting requirements, low testing efficiency, and difficulty in ensuring test adequacy. The device and method can fully test the functions and performance of a multi-node network with high fidelity in a laboratory environment, thereby improving test efficiency and having strong practicality and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific implementation of the present invention will be further explained below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a schematic diagram of the test device of the present invention;

[0030] Figure 2 It is a schematic diagram of the time frame and time slot of the present invention;

[0031] Figure 3 The figure is a flow chart of the testing method of the present invention. DETAILED DESCRIPTION

[0032] See attached Figure 1 The directional antenna mobile ad hoc network testing device of the present invention comprises:

[0033] Scene monitoring computer 1, network switch 2, multi-channel timing module 3, intermediate frequency matrix switch 4 (the network management module and modulation and demodulation module shown in the dotted box are the devices to be tested by the present invention), wherein three independent software function modules are deployed on the scene monitoring computer 1:

[0034] Network monitoring software module 11: ① Edit and generate network frame period, time slot length, and parameters such as the number, ID, initial position, speed, direction of movement and path of nodes, and send them to the network management module under test to complete network parameter initialization; ② Initiate various networking control commands and send them to the corresponding network management module under test, including network establishment, network exit, late network entry, and establishment and removal of various service links; ③ Display network topology based on the current position information of the node in the status message returned by the network management module of each node; ④ Simulate and generate various service data and send them to each network management module, receive service messages from the network management module and perform message statistics. ⑤ The network monitoring software module supports the editing and saving of typical scenarios of the network under test.

[0035] Matrix switch control software module 12: ① Initialize configuration of matrix switch port; ② Receive time slot messages from network management modules of each node; ③ Make joint decisions on time slot number / time stamp, frequency point, and antenna pointing information in the message, and judge nodes with matching time slot, frequency point, and pointing point as connected, and judge the rest as disconnected; ④ Generate corresponding matrix switch control messages and send to intermediate frequency matrix switch 4.

[0036] Timing control software module 13: According to the network time frame period and time slot length set by network monitoring software module 11, it periodically generates the time offset of the timing signal of each time slot in each time frame relative to the reference second pulse, and sends it to the multi-channel timing module 3. A time frame period contains multiple time slots, and the time offset of the timing signal of each time slot is P i The time frame number N and the time frame period T, the time slot number n and the time slot length t, and the simulated time difference Δ of each node i Decide:

[0037] P i =N×T+n×t+Δ i —— (1)

[0038] Where N and n both start from 0. The relationship between time frame and time slot is shown as follows: Figure 2 .

[0039] The network switch 2 connects the scene monitoring computer 1, the multi-channel timing module 3, the intermediate frequency matrix switch 4 and the tested network management module and the modulation and demodulation module of the present invention into a test network.

[0040] Multi-channel timing module 3; ① can use the internal clock source of the multi-channel timing module 3, or directly use the external second pulse as a reference to generate a multi-channel second pulse signal as the time reference of each node; ② receive the control message of the timing control software module 13, and generate a multi-channel timing signal according to the time offset set in the message. The period and time difference of the multi-channel timing signal can be set.

[0041] In this embodiment, the multi-channel timing signals can be divided into different groups. In addition to being used as the trigger for closing / opening the intermediate frequency matrix switch 4, the timing signals of different groups can also be used to trigger the network management module and the modulation and demodulation module of the timing drive network with synchronization requirements.

[0042] In this embodiment, the timing relationship of the timing signals of different groups can be set to adapt the response time of the matrix switch and the response time of the network management module and the modulation and demodulation module of different networks under test, so as to ensure the synchronization between the test device and the device under test and the integrity of signal transmission and reception;

[0043] In this embodiment, the time difference of different timing signals in the same group (that is, Δ i ) can be set to simulate the time difference caused by time asynchrony when the network under test is actually working.

[0044] IF matrix switch 4: ① It has multiple IF I / O (input / output) ports and multiple timing control ports. The network node IDs corresponding to the IF and timing ports can be initialized and configured by the matrix switch control software module 12 according to the actual connection; ② It receives the matrix switch control message sent by the matrix switch control software module 12, and according to the connection relationship of the input and output ports in the control message, it completes the closing / opening action of the switch under the triggering of the timing signal generated by the multi-way timing module 3, simulates the directional antenna beam alignment, and provides a closed loop for the IF signal of each node modem. ③ One input port is connected to multiple output ports at the same time, and multiple input ports are connected to one output port at the same time.

[0045] Among them, one input port is connected to multiple output ports at the same time, which can simulate the scenario where multiple receiving nodes exist simultaneously in a directional transmission beam.

[0046] Multiple input ports are connected to one output port at the same time, which can simulate the scenario where multiple transmit beams are directed to one receiving node at the same time.

[0047] like Figure 3 As shown, the present invention provides a directional antenna mobile ad hoc network testing method, the method comprising the following steps:

[0048] S01: Figure 1 Connect the test device and the device under test;

[0049] S02: through the network monitoring software module 11, the time frame period and time slot length of the timing signal are set according to the network time frame period and time slot length of the network under test; the number, ID, initial position, speed, movement direction and path of the node are set and sent to the network management module under test to complete the network parameter initialization;

[0050] S03: according to the actual connection relationship between the intermediate frequency matrix switch 4 and the modulation and demodulation module and the multi-channel timing module 3, the matrix switch control software module 12 performs initialization configuration of the intermediate frequency matrix switch;

[0051] S04: The network monitoring software module 11 selects a node to initiate a network building command;

[0052] S05: The matrix switch control software module 12 receives the time slot control message generated by each network management module after receiving the network establishment command through the network switch, makes a joint judgment on the time slot number / time stamp, frequency point, and antenna pointing information in the message, generates a corresponding matrix switch control message, and sends it to the intermediate frequency matrix switch 4 through the network.

[0053] S06: The intermediate frequency matrix switch 4 receives the matrix switch control message, and completes the analysis of the corresponding relationship between each time slot node ID and the matrix switch port number in combination with the initialization configuration according to the actual connection situation, generates an on-off control table, and waits for the timing signal to trigger;

[0054] S07: The timing control software module 13 calculates the time offset of the timing signal of each time slot in the current time frame relative to the reference second pulse according to the network time frame period and time slot length set by the network monitoring software module 11, generates a timing control message and sends it to the multi-channel timing module 3 through the network;

[0055] S08: The multi-channel timing module 3 receives the control message from the timing control software module 13, and generates a multi-channel timing signal according to the time offset set in the message;

[0056] S09: When triggered by the timing signal, the intermediate frequency matrix switch 4 completes the closing / opening action between the ports according to the on-off control table.

[0057] At this point, the test device supports the modem module to complete the transmission and reception demodulation of the signal under the control of the time slot control table of the network management module under test, and realize the interaction of networking control messages between nodes, thereby supporting the testing of various network functions such as initial network establishment.

[0058] After a certain network function / performance test is completed, the network monitoring software module 11 initiates a network dismantling instruction to end the current test; then, according to the network scenario to be tested, the network monitoring software module 11 edits and generates different scenario parameters to traverse and test various possible scenarios of the network.

[0059] Aiming at the situation that the full physical test of directional antenna mobile self-organizing network has high supporting requirements, difficult organization and implementation, low test efficiency and difficult to ensure test adequacy, the present invention proposes a directional antenna mobile self-organizing network adjustment and testing method and device based on intermediate frequency matrix switch. The semi-physical method can fully verify the networking control protocol of multi-node network with high fidelity in laboratory environment, improve the efficiency of network adjustment and the adequacy of test, the number of network nodes is only limited by the number of timing signal paths and the number of matrix switch ports, and the test scene can be edited arbitrarily without being restricted by factors such as site and road. Compared with the full physical test method, it has obvious advantages in supporting network scale, test adequacy and guarantee requirements, and has strong practicality and good application prospects.

[0060] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A directional antenna mobile self-organizing network test device, characterized in that: It includes scene monitoring computer, network switch, multi-channel timing module and intermediate frequency matrix switch; Among them, the scene monitoring computer includes a network monitoring software module, a matrix switch control software module and a timing control software module; the network switch connects the scene monitoring computer, the multi-channel timing module, the intermediate frequency matrix switch and the tested network management module and the modulation and demodulation module into a test network; the multi-channel timing module generates multi-channel timing signals; the intermediate frequency matrix switch completes the closing / disconnecting action between ports under the triggering of the timing switch.

2. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: The network monitoring software modules include: editing, generating, saving and calling network scenario parameters; generating various networking control commands; simulating the generation, reception and statistics of various business data; and real-time display of network topology.

3. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: The matrix switch control software module includes: initializing the configuration of the matrix switch port; receiving the time slot message of each node network management module and making a joint judgment on the time slot number / time stamp, frequency point, and antenna pointing information in the message, and generating the judgment result into the corresponding matrix switch control message.

4. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: The timing control software module periodically generates the time offset of the timing signal of each time slot in each time frame relative to the reference second pulse according to the network time frame period and time slot length set by the network monitoring software module, and sends it to the multi-channel timing module; a time frame period contains multiple time slots, and the time offset of the timing signal of each time slot is P i The time frame number N and the time frame period T, the time slot number n and the time slot length t, and the simulated time difference Δ of each node i Decide: P i =N×T+n×t+Δ i Where N and n both start from 0.

5. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: The multi-channel timing module generates multi-channel second pulse signals using an internal reference source or an external reference source; generates multi-channel timing signals according to the set time offset, and the period and time difference of the multi-channel timing signals can be set.

6. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: Multiple timing signals can be divided into different groups.

7. The directional antenna mobile self-organizing network testing device according to claim 6, characterized in that: Group timing signals, the timing relationship between different groups can be set, and the time difference between timing signals of different channels in the same group can be set.

8. The directional antenna mobile self-organizing network testing device according to claim 1, characterized in that: The IF matrix switch has multiple IF I / O ports and multiple timing control ports, and their mapping relationships are configurable; The connection relationship of the switch's I / O ports is given by the control table, and the closing / opening action is triggered by the timing signal.

9. The directional antenna mobile self-organizing network testing device according to claim 8, characterized in that: The IF matrix switch supports one input port connecting to multiple output ports at the same time, and multiple input ports connecting to one output port at the same time.

10. A directional antenna mobile self-organizing network testing method, characterized in that: A testing device according to any one of claims 1 to 9, comprising the following steps: S01: Connect the test device and the device under test; S02: through the network monitoring software module, the time frame period and time slot length of the timing signal are set according to the network time frame period and time slot length of the network under test; the number, ID, initial position, speed, movement direction and path parameters of the nodes are set and sent to the network management module under test to complete the network parameter initialization; S03: According to the actual connection relationship between the intermediate frequency matrix switch and the modulation and demodulation module and the multi-channel timing module, the matrix switch control software module performs initialization configuration of the intermediate frequency matrix switch; S04: The network monitoring software module selects a node to initiate a network building command; S05: The matrix switch control software module receives the time slot control message generated by each network management module after receiving the network establishment command through the network switch, makes a joint judgment on the time slot number / time stamp, frequency point, and antenna pointing information in the message, generates a corresponding matrix switch control message, and sends the intermediate frequency matrix switch through the network; S06: The intermediate frequency matrix switch receives the matrix switch control message, and completes the analysis of the corresponding relationship between the node ID of each time slot and the matrix switch port number in combination with the initialization configuration according to the actual connection situation, generates an on-off control table, and waits for the timing signal to trigger; S07: The timing control software module calculates the time offset of the timing signal of each time slot in the current time frame relative to the reference second pulse according to the network time frame period and time slot length set by the network monitoring software module, generates a timing control message and sends it to the multi-channel timing module through the network; S08: The multi-channel timing module receives the control message from the timing control software module and generates a multi-channel timing signal according to the time offset set in the message; S09: When triggered by the timing signal, the intermediate frequency matrix switch completes the closing / opening action between the ports according to the on / off control table.

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