A scattering communication link control method based on centralized planning and scheduling strategy

Abstract

The present invention discloses a scattering communication link building control method based on centralized planning and scheduling strategy. The method is responsible for scattering link planning and scattering link scheduling through a network management center node, and sends a scattering link building notification; the scattering communication vehicle node is responsible for specific scattering link control, and cooperates with the opposite scattering communication vehicle node to complete the scattering link building request, scattering link building response and link handshake opening process of the relevant scattering link according to the scattering link building notification information content. The present invention adopts Beidou short message as the basic control channel, which can conveniently and flexibly realize the scattering link networking scheduling, and is suitable for both the scattering link building in the scattering communication system opening stage and the dynamic adjustment of the scattering link in the network operation stage.

Description

Technical Field

[0001] The present invention relates to the field of scattering communication system network management related to the opening of scattering communication links, and in particular to a scattering communication link establishment control method based on centralized planning and scheduling strategy. Background Art

[0002] Scattering communication technology has developed rapidly in recent years. It has the characteristics of stable propagation channel, strong anti-interference ability, high reliability, large bandwidth, and long single-hop span, and has been widely used at home and abroad. At present, scattering links mainly use point-to-point communication. When using it, it is necessary to control the scattering antennas to align with each other according to the geographical location of the stations at both ends of the scattering link and complete the opening of the scattering link. After that, it can be networked and transmitted through network routing / switching equipment.

[0003] In the past, in the actual application of scattering communication vehicles in the field over large spans, due to the lack of effective auxiliary communication means, the scattering link establishment operation mainly relied on pre-agreed geographical locations and link relationships through manual or auxiliary equipment. When encountering communication node failures or changes in network topology requirements, adjusting the scattering link is time-consuming and laborious, and it is difficult to meet the communication timeliness requirements. In recent years, with the widespread application of Beidou SMS and the expansion of signal coverage capabilities, it is very suitable as an auxiliary communication means for scattering link establishment control. However, there is no public solution in the prior art for using Beidou SMS to control scattering link establishment. Summary of the invention

[0004] In view of this, the present invention provides a scattering communication link control method based on centralized planning and scheduling strategy. The present invention adopts Beidou short message as the basic control channel, which can conveniently and flexibly realize the scattering link networking scheduling, and is suitable for both the scattering link establishment in the scattering communication system opening stage and the scattering link dynamic adjustment in the network operation stage.

[0005] The technical solution adopted by the present invention is:

[0006] A scattering communication link establishment control method based on centralized planning and scheduling strategy includes the following steps:

[0007] (1) A Beidou SMS module is configured in the network management center and each scatter communication vehicle as the basic signaling control channel. The Beidou SMS module includes positioning and orientation functions. Each scatter communication vehicle obtains the latitude, longitude and altitude information of its location through the Beidou SMS module;

[0008] (2) According to the needs of communication transmission, the scattering link planning module of the network management center is used to plan the scattering link topology and plan the list of scattering links that need to be opened;

[0009] (3) For each scatter link that needs to be opened, the scatter link scheduling module of the network management center sends a link establishment notification message to the scatter communication vehicle Tz, the master control end of the link, through the Beidou SMS module;

[0010] (4) After receiving the link establishment notification message sent by the network management center, the scattering link control module of the scattering communication vehicle Tz executes the scattering link establishment request processing flow: sending a scattering link establishment request message to the scattering communication vehicle Tc at the slave control end, and completing the preparation work before the opening of the scattering link at the local end after arriving at the planned position of the master control end, including adjusting the parking direction of the vehicle, deploying the scattering antenna, and setting the working frequency of the scattering equipment;

[0011] (5) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link establishment response processing flow is executed: a scattering link establishment response message is sent to the scattering communication vehicle Tz at the link master end, and after arriving at the planned position at the slave end, the preparation work before the opening of the scattering link at the local end is completed, including adjusting the parking direction of the local vehicle, unfolding the scattering antenna, setting the working frequency of the scattering device, and finally setting the scattering device Dc of the local vehicle to the link establishment waiting state;

[0012] (6) After the scattering link control module of the scattering communication vehicle Tz receives the scattering link establishment response message sent by the scattering communication vehicle Tc, it executes the scattering link handshake opening process: if the scattering communication vehicle Tz has not completed the scattering link establishment request process, it waits for the scattering communication vehicle Tz to complete the scattering link establishment request process; after the scattering communication vehicle Tz completes the scattering link establishment request process, it starts the scattering link handshake negotiation process. The scattering communication vehicles at both ends realize link handshake negotiation and fine alignment of scattering antennas through scattering signals. After the negotiation at both ends is completed, the scattering link is opened;

[0013] (7) When a scattering node fails or a scattering link needs to be adjusted, repeat steps (2) to (6) to adjust and reconstruct the scattering network links.

[0014] Furthermore, in step (2), the process of scatter link topology planning is as follows:

[0015] (201) Use the scatter link planning module of the network management center to establish and maintain the scatter communication vehicle resource information table, which is used to store the scatter communication vehicle information used by the system; the information of each scatter communication vehicle includes the scatter communication vehicle identification, the scatter communication vehicle name, the Beidou equipment user number and one or more sets of vehicle-mounted scattering equipment information, and each set of vehicle-mounted scattering equipment information includes the scattering equipment identification, the scattering equipment name, and the scattering equipment type;

[0016] (202) using the scatter link planning module of the network management center to complete the planning of one or more scatter links, the scatter link planning content includes: determining the longitude and latitude positions of the stations at both ends of the scatter link; determining the station at one end of the link as the master control end and the other end as the slave control end, and configuring the associated scatter communication vehicle, scatter equipment, and scatter working channel information for the master control end and the slave control end of the scatter link respectively, wherein the scatter communication vehicle and scatter equipment are all from the scatter communication vehicle resource information table;

[0017] (203) After the scatter link planning is completed, the scatter link planning module generates a scatter link planning table, where each scatter link information includes a scatter link identifier Ln, link master end planning configuration information, and link slave end planning configuration information; wherein the link master end planning configuration information includes:

[0018] The geographical location of the master terminal, i.e. longitude Bz, latitude Lz, and altitude Hz,

[0019] Information of scattering communication vehicle Tz, namely, scattering communication vehicle identification Tz, name TNz, Beidou user number TBz,

[0020] Scattering device Dz information, namely, scattering device identifier Dz, name DNz, transmission channel number TFz and reception channel number RFz;

[0021] The planning and configuration information of the link slave station includes:

[0022] From the geographical location of the control station, that is, longitude Bc, latitude Lc, and altitude Hc,

[0023] Scattering communication vehicle Tc information, namely, scattering communication vehicle identification Tc, name TNc, Beidou user number TBc,

[0024] Scattering device Dc information, namely, scattering device identifier Dc, name DNc, transmission channel number TFc and reception channel number RFc.

[0025] Furthermore, in step (3), the process of sending the link establishment notification message is as follows:

[0026] (301) Starting a scattering link scheduling module of the network management center, the scattering link scheduling module reads and displays a scattering link list planned by the scattering link planning module;

[0027] (302) A scattering link Ln to be opened is selected from the scattering link list and a scattering link establishment notification message is started. The scattering link scheduling module sends a scattering link establishment notification message to the scattering communication vehicle Tz of the master control end of the selected link Ln through the Beidou SMS device. The Beidou device user number of the scattering communication vehicle Tz of the master control end of the selected link Ln is TBz. The scattering link establishment notification message carries the following contents: the longitude Bz, latitude Lz, and altitude Hz of the master control end, the master control end scattering device identifier Dz, the master control end sending channel number TFz and the receiving channel number RFz; the longitude Bc, latitude Lc, and altitude Hc of the slave control end site, the slave control end scattering device identifier Dc, the slave control end sending channel number TFc and the receiving channel number RFc, and the slave control end Beidou user number TBc.

[0028] (303) Continue to select other scattering links that need to be opened and complete the corresponding scattering link establishment notification issuance until all scattering link establishment notifications are issued.

[0029] Furthermore, in step (4), the scatter link establishment request processing flow is as follows:

[0030] (401) After receiving the scattering link establishment notification message sent by the network management center, the scattering link control module of the scattering communication vehicle Tz obtains the planning configuration information of the vehicle, that is, the link master control end, and the planning configuration information of the link peer site from the link establishment notification message, including: the longitude Bz, latitude Lz, and altitude Hz of the vehicle, the scattering device identifier Dz of the vehicle, the sending channel number TFz and the receiving channel number RFz of the vehicle, the longitude Bc, latitude Lc, and altitude Hc of the slave control end, the scattering device identifier Dc of the slave control end, the sending channel number TFc and the receiving channel number RFc of the slave control end, and the Beidou user number TBc of the slave control end;

[0031] (402) The scattering communication vehicle Tz determines whether the vehicle has reached the planned position of the master control end of the link to be established. If the vehicle has not reached the planned position of the master control end, it sends a scattering link establishment request message marked as moving to the slave control end scattering communication vehicle Tc, and continues to drive to the planned position of the master control end until it reaches the planned position of the master control end. The Beidou user number of the slave control end scattering communication vehicle Tc is TBc; if the vehicle has reached the planned position of the master control end, it sends a scattering link establishment request message marked as ready to the slave control end scattering communication vehicle Tc; the scattering link establishment request message includes: the longitude Bz, latitude Lz, and altitude Hz of the master control end, the state of the master control end, the longitude Bc, latitude Lc, and altitude Hc of the slave control end planned by the system, the scattering device identifier Dc, the sending channel number TFc, and the receiving channel number RFc; the state of the master control end is ready or moving;

[0032] (403) After the scatter communication vehicle Tz arrives at the planned position of the master control end, the parking direction of the scatter communication vehicle Tz is calculated based on the acquired longitude Bz, latitude Lz, elevation Hz of the vehicle and the longitude Bc, latitude Lc, elevation Hc of the slave control station, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scatter communication vehicle Tz is manually adjusted first;

[0033] (404) The scattering communication vehicle Tz calculates the deployment direction of the scattering antenna based on the acquired information of the vehicle's longitude Bz, latitude Lz, altitude Hz and the longitude Bc, latitude Lc, altitude Hc from the control station, and deploys the antenna of the scattering device Dz according to the calculation result, then sets the working frequency of the scattering device Dz to the transmission channel number TFz and the receiving channel number RFz, and prepares to execute the scattering link handshake activation process.

[0034] Furthermore, in step (5), the scatter link establishment response processing flow is as follows:

[0035] (501) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link control module of the scattering communication vehicle Tc learns that the short message comes from the Beidou user number TBz, and parses the link establishment request message to learn the following information: the vehicle status of the master control end, the longitude Bz, latitude Lz, and altitude Hz of the master control end vehicle, the longitude Bc, latitude Lc, and altitude Hc of the vehicle planned by the system, the scattering device identifier Dc, the sending channel number TFc, and the receiving channel number RFc;

[0036] (502) The scattering communication vehicle Tc determines whether the vehicle has reached the longitude and latitude position of the vehicle planned by the system. If the vehicle has reached the planned position, step (503) is directly executed. Otherwise, a scattering link establishment response message marked as moving is sent to the master control end scattering communication vehicle Tz through the Beidou user number TBz, and the vehicle continues to travel to the planned position of the scattering communication vehicle Tc until it reaches the planned position and then step (503) is executed.

[0037] (503) After the scattered communication vehicle Tc reaches the longitude and latitude position of the vehicle planned by the system, the parking direction of the scattered communication vehicle Tc is calculated according to the longitude Bz, latitude Lz, and elevation Hz of the vehicle at the master control end and the longitude Bc, latitude Lc, and elevation Hc of the vehicle, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scattered communication vehicle Tc is manually adjusted first;

[0038] (504) The scattering communication vehicle Tc calculates the deployment direction of the scattering antenna according to the longitude Bz, latitude Lz, altitude Hz of the main control vehicle and the longitude Bc, latitude Lc, altitude Hc of the vehicle itself, and deploys the antenna with the scattering device Dc according to the calculation result. Then, the scattering communication vehicle Tc sends a scattering link establishment response message marked as ready to the scattering communication vehicle Tz through the Beidou user number TBz, and sets the working frequency of the scattering device Dc to the sending channel number TFc and the receiving channel number RFc. Then, the link establishment waiting instruction is sent to the scattering device Dc on the local side, and the scattering device Dc immediately enters the scattering link air interface signal detection state.

[0039] Furthermore, in step (6), the scatter link handshake opening process is as follows:

[0040] (601) After receiving the scattering link establishment response message sent by the scattering communication vehicle Tc and marked as ready, the scattering link control module of the scattering communication vehicle Tz checks whether the vehicle has completed the processing flow of the scattering link establishment request. If the scattering link establishment request processing process has been completed, step (602) is directly executed. Otherwise, it needs to wait until the scattering link establishment request processing process is completed before executing step (602);

[0041] (602) The scattering link control module of the scattering communication vehicle Tz sends a link negotiation start instruction to the scattering device Dz, and then enters the link handshake negotiation process between the scattering devices. The process is as follows:

[0042] a) The scattering device Dz starts the scattering link handshake negotiation on the scattering link air interface and sends a link handshake signal;

[0043] b) After detecting the link handshake signal, the scattering device Dc automatically enters the scattering link handshake negotiation state and sends a link handshake response signal;

[0044] c) After detecting the link handshake response signal, the scattering device Dz enters the antenna fine alignment and link negotiation phase with the scattering device Dc until the scattering transmission link is opened;

[0045] (603) After issuing the link negotiation start instruction, the scattering link control module of the scattering communication vehicle Tz collects the scattering link status information from the scattering device Dz in real time and determines whether the scattering link has been opened.

[0046] The beneficial effects of the present invention compared with the background technology are:

[0047] 1. The present invention proposes a scattering communication system link building control method based on centralized planning and scheduling strategy, which is more compatible with the centralized planning and management mode of the scattering communication system, and can conveniently and flexibly realize the scattering link networking scheduling, which is suitable for both the scattering link building in the scattering communication system opening stage and the dynamic adjustment of the scattering link in the network operation stage;

[0048] 2. The present invention adopts Beidou short message as the basic control channel, and the signal coverage is wide, so that the system is applicable to most geographical areas, has strong applicability and is easy to use;

[0049] 3. The present invention optimizes the scattering link building control process. Through the design of the scattering link master and slave, the link building process is clear, stable and reliable;

[0050] 4. The processing flow of the present invention is also fully applicable to the case where other types of communication methods (such as shortwave, satellite communication) are used as scattering link establishment control channels. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 is a block diagram of the architecture of a communication system in an embodiment of the present invention;

[0052] Figure 2 is a schematic diagram of the scattering link planning processing steps of an embodiment of the present invention;

[0053] Figure 3 Schematic diagram of the scatter link establishment notification processing steps according to an embodiment of the present invention;

[0054] Figure 4 1 is a schematic diagram of the steps of processing a scatter link establishment request according to an embodiment of the present invention;

[0055] Figure 5 1 is a schematic diagram of the scatter link establishment response processing steps of an embodiment of the present invention;

[0056] Figure 6 It is a schematic diagram of the scatter link handshake activation processing steps of an embodiment of the present invention. Implementation

[0057] A scattering communication link establishment control method based on centralized planning and scheduling strategy, comprising:

[0058] (1) A Beidou SMS module is configured in the network management center and each scatter communication vehicle as the basic signaling control channel. The Beidou SMS module includes positioning and orientation functions. Each scatter communication vehicle can obtain the latitude, longitude and altitude information of its location through the Beidou SMS module;

[0059] (2) According to the communication transmission needs, the network management center personnel use the scattering link planning module to plan the scattering link topology and plan the list of scattering links that need to be opened;

[0060] (3) For each scatter link that needs to be opened, the scatter link scheduling module of the network management center sends a link establishment notification message to the scatter communication vehicle Tz, the master control end of the link, through the Beidou SMS module;

[0061] (4) After receiving the link establishment notification message sent by the network management center, the scattering link control module of the scattering communication vehicle Tz executes the scattering link establishment request processing flow: sending a scattering link establishment request message to the slave control end scattering communication vehicle Tc, and completing the preparation work before the opening of the local scattering link after arriving at the planned position of the master control end, including adjusting the parking direction of the vehicle, deploying the scattering antenna, setting the working frequency of the scattering equipment, etc.;

[0062] (5) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link establishment response processing flow is executed: a scattering link establishment response message is sent to the scattering communication vehicle Tz at the link master end, and after arriving at the planned position at the slave end, the preparation work before the opening of the scattering link at the local end is completed, including adjusting the parking direction of the local vehicle, deploying the scattering antenna, setting the working frequency of the scattering device, etc. Finally, the scattering device Dc of the local vehicle is set to the link establishment waiting state (i.e., the scattering link air interface signal detection state);

[0063] (6) After the scattering link control module of the scattering communication vehicle Tz receives the scattering link establishment response (ready) message sent by the scattering communication vehicle Tc, it executes the scattering link handshake opening process: if the scattering communication vehicle Tz has not completed the scattering link establishment request process, it waits for the scattering communication vehicle Tz to complete the scattering link establishment request process; after the scattering communication vehicle Tz completes the scattering link establishment request process, it starts the scattering link handshake negotiation process. The scattering communication vehicles at both ends realize link handshake negotiation and fine alignment of scattering antennas through scattering signals. After the negotiation at both ends is completed, the scattering link is opened;

[0064] (7) When a scattering node fails or a scattering link needs to be adjusted, the network management center personnel can repeat steps (2) to (6) to adjust and reconstruct the scattering network link.

[0065] Furthermore, in the above method, the steps of the scattering link topology planning process are as follows:

[0066] (8) The network management center personnel use the scatter link planning module to establish and maintain the scatter communication vehicle resource information table to store the scatter communication vehicle information used by the system. The information of each scatter communication vehicle includes the scatter communication vehicle identification, scatter communication vehicle name, Beidou equipment user number and one or more sets of vehicle-mounted scatter equipment information, etc. The information of each set of vehicle-mounted scatter equipment includes the scatter equipment identification, scatter equipment name, scatter equipment type, etc.

[0067] (9) The personnel of the network management center use the scatter link planning module to complete the planning of one or more scatter links. The scatter link planning content includes: determining the longitude and latitude positions of the stations at both ends of the scatter link; determining the station at one end of the link as the master control end and the other end as the slave control end, and configuring the associated scatter communication vehicle, scatter equipment, scatter working channel and other information for the master control end and the slave control end of the scatter link respectively. The scatter communication vehicle and scatter equipment are all from the scatter communication vehicle resource information table;

[0068] (10) After completing the scattering link planning, the scattering link planning module generates a scattering link planning table. Each scattering link information includes the scattering link identifier Ln, the link master control end planning configuration information, and the link slave control end planning configuration information, wherein: the link master control end planning configuration information includes the geographical location of the master control end (longitude Bz / latitude Lz / elevation Hz), the scattering communication vehicle Tz information (scattering communication vehicle identifier Tz, name TNz, Beidou user number TBz), and the scattering device Dz information (scattering device identifier Dz, name DNz, transmission channel number TFz / reception channel number RFz); the link slave control station planning configuration information includes the geographical location of the slave control station (longitude Bc / latitude Lc / elevation Hc), the scattering communication vehicle Tc information (scattering communication vehicle identifier Tc, name TNc, Beidou user number TBc), and the scattering device Dc information (scattering device identifier Dc, name DNc, transmission channel number TFc / reception channel number RFc).

[0069] Furthermore, in the above method, the steps of sending the scatter link establishment notification process are as follows:

[0070] (11) The network management center personnel start the scatter link scheduling module, and the scatter link scheduling module reads and displays the scatter link list planned by the scatter link planning module;

[0071] (12) After the network management center personnel select a scattering link Ln to be opened from the scattering link list and start sending the scattering link establishment notification message, the scattering link scheduling module sends a scattering link establishment notification message to the scattering communication vehicle Tz (Beidou device user number TBz) of the master control end of the selected link Ln through the Beidou SMS device. The scattering link establishment notification message carries the following contents: the master control end longitude Bz / latitude Lz / elevation Hz, the master control end scattering device identifier Dz, the master control end sending channel number TFz / receiving channel number RFz; the slave control end site longitude Bc / latitude Lc / elevation Hc, the slave control end scattering device identifier Dc, the slave control end sending channel number TFc / receiving channel number RFc, and the slave control end Beidou user number TBc;

[0072] (13) The network management center personnel continue to select other scatter links that need to be opened and complete the issuance of corresponding scatter link establishment notifications until all scatter link establishment notifications are issued.

[0073] Furthermore, in the above method, the steps of the scatter link establishment request processing process are as follows:

[0074] (14) After the scattering link control module of the scattering communication vehicle Tz receives the scattering link establishment notification message sent by the network management center, it obtains the planning configuration information of the vehicle (i.e., the link master end) and the planning configuration information of the link peer end site from the link establishment notification message, including: the longitude Bz / latitude Lz / elevation Hz of the vehicle, the scattering device identifier Dz of the vehicle, the sending channel number TFz / receiving channel number RFz of the vehicle; the longitude Bc / latitude Lc / elevation Hc of the slave end, the scattering device identifier Dc of the slave end, the sending channel number TFc / receiving channel number RFc of the slave end, and the Beidou user number TBc of the slave end;

[0075] (15) The scattering communication vehicle Tz determines whether it has reached the planned position of the master control end of the link to be established. If it has not yet reached the planned position of the master control end, it sends a scattering link establishment request (moving) message to the slave control end scattering communication vehicle Tc (Beidou user number TBc), and continues to drive to the planned position of the master control end until it reaches the planned position of the master control end; if it has reached the planned position of the master control end, it sends a scattering link establishment request (ready) message to the slave control end scattering communication vehicle Tc (Beidou user number TBc). The content of the scattering link establishment request message includes: the longitude Bz / latitude Lz / elevation Hz of the master control end, the status of the master control end (ready / moving); the longitude Bc / latitude Lc / elevation Hc of the slave control end planned by the system, the scattering device identifier Dc, the sending channel number TFc / receiving channel number RFc;

[0076] (16) After the scatter communication vehicle Tz arrives at the planned position of the master control end, the parking direction of the scatter communication vehicle Tz is calculated based on the longitude Bz / latitude Lz / elevation Hz of the vehicle and the longitude Bc / latitude Lc / elevation Hc of the slave control station, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scatter communication vehicle Tz is adjusted manually first;

[0077] (17) The scattering communication vehicle Tz calculates the deployment direction of the scattering antenna based on the acquired information of its own longitude Bz / latitude Lz / elevation Hz and the slave control station longitude Bc / latitude Lc / elevation Hc, and deploys the antenna of the scattering device Dz according to the calculation result, then sets the operating frequency of the scattering device Dz to the transmitting channel number TFz / receiving channel number RFz, and prepares to execute the scattering link handshake activation process.

[0078] Furthermore, in the above method, the steps of the scattering link establishment response processing process are as follows:

[0079] (18) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link control module of the scattering communication vehicle Tc can learn that the short message comes from the Beidou user number TBz. After parsing the link establishment request message, the information obtained includes: the status of the master vehicle (ready / moving), the longitude Bz / latitude Lz / elevation Hz of the master vehicle; the longitude Bc / latitude Lc / elevation Hc of the vehicle planned by the system, the scattering device identifier Dc, and the sending channel number TFc / receiving channel number RFc;

[0080] (19) The scattering communication vehicle Tc determines whether the vehicle has reached the longitude and latitude position of the vehicle planned by the system. If the vehicle has reached the planned position, step (20) is directly executed. Otherwise, after sending a scattering link establishment response (moving) message to the master control end scattering communication vehicle Tz (Beidou user number TBz), the vehicle continues to drive towards the planned position of the scattering communication vehicle Tc until it reaches the planned position and then executes step (20);

[0081] (20) After the scattered communication vehicle Tc reaches the longitude and latitude position of the vehicle planned by the system, the parking direction of the scattered communication vehicle Tc is calculated according to the longitude Bz / latitude Lz / elevation Hz of the main control vehicle and the longitude Bc / latitude Lc / elevation Hc of the vehicle, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scattered communication vehicle Tc is adjusted manually first;

[0082] (21) The scattering communication vehicle Tc calculates the deployment direction of the scattering antenna according to the longitude Bz / latitude Lz / elevation Hz of the main control vehicle and the longitude Bc / latitude Lc / elevation Hc of the vehicle itself, and deploys the antenna with the scattering device Dc according to the calculation result. It then sends a scattering link establishment response (ready) message to the scattering communication vehicle Tz (Beidou user number TBz), and sets the working frequency of the scattering device Dc to the sending channel number TFc / receiving channel number RFc. It then sends a link establishment waiting instruction to the scattering device Dc on its own side, and the scattering device Dc immediately enters the scattering link air interface signal detection state.

[0083] Furthermore, in the above method, the steps of the scatter link handshake activation process are as follows:

[0084] (22) After receiving the scattering link establishment response (ready) message sent by the scattering communication vehicle Tc, the scattering link control module of the scattering communication vehicle Tz checks whether the vehicle has completed the processing flow of the scattering link establishment request. If the scattering link establishment request processing process has been completed, step (23) is directly executed; otherwise, step (23) needs to be executed after the scattering link establishment request processing process is completed;

[0085] (23) The scattering link control module of the scattering communication vehicle Tz sends a link negotiation start instruction to the scattering device Dz, and then enters the link handshake negotiation process between the scattering devices. The general process is as follows: a) The scattering device Dz starts the scattering link handshake negotiation on the scattering link air interface and sends a link handshake signal; b) After detecting the link handshake signal, the scattering device Dc automatically enters the scattering link handshake negotiation state and sends a link handshake response signal; c) After detecting the link handshake response signal, the scattering device Dz enters the antenna fine alignment and link negotiation stage with the scattering device Dc until the scattering transmission link is opened;

[0086] (24) After issuing the link negotiation start command, the scattering link control module of the scattering communication vehicle Tz can collect the scattering link status information from the scattering device Dz in real time and determine whether the scattering link has been opened.

[0087] Figure 1 The application scenario of this method is shown. The communication system consists of a network management center node and a scattering communication vehicle node, wherein: there is one network management center node, including a scattering link planning module, a scattering link scheduling module and a Beidou SMS module; there are multiple scattering communication vehicle nodes, including a scattering link control module, a Beidou SMS module (including positioning and orientation) and a scattering device (including an antenna). It should be noted that a scattering communication vehicle node can be used as a network management center node. In this case, the scattering communication vehicle node includes a scattering link planning module and a scattering link scheduling module.

[0088] The scatter link planning module is responsible for the maintenance of scatter communication vehicle resources and scatter link topology planning. When the scatter link planning is completed, a scatter link planning table can be generated;

[0089] The scatter link scheduling module is responsible for reading and displaying the scatter link planning table generated by the scatter link planning module. The network management center personnel can select one or more scatter links as needed to send scatter link establishment notifications through the Beidou SMS module;

[0090] The scatter link control module is responsible for receiving and executing the scatter link opening tasks in the scatter link establishment notification message, including scatter link establishment request, scatter link establishment response, and scatter link handshake opening, and finally realizes the opening of the links at both ends of the scatter link.

[0091] The Beidou communication module (including positioning and orientation) is responsible for sending and receiving scattering link establishment notification messages and scattering link establishment request messages, and can also provide positioning and orientation information;

[0092] The scattering device (including the antenna) is responsible for scattering link signal handshake, link negotiation and service data transmission.

[0093] like Figure 2 As shown in the figure, the scatter link planning process steps are as follows:

[0094] (1) The network management center personnel use the scatter link planning module to establish and maintain the scatter communication vehicle resource information table to store the scatter communication vehicle information used by the system. The information of each scatter communication vehicle includes the scatter communication vehicle identification, scatter communication vehicle name, Beidou equipment user number, and one or more sets of vehicle-mounted scatter equipment information, etc. The information of each set of vehicle-mounted scatter equipment includes the scatter equipment identification, scatter equipment name, scatter equipment type, etc.;

[0095] (2) The personnel of the network management center use the scattering link planning module to complete the planning of one or more scattering links. The scattering link planning content includes: determining the longitude and latitude positions of the stations at both ends of the scattering link; determining the station at one end of the link as the master control end and the other end as the slave control end, and configuring the associated scattering communication vehicle, scattering equipment, scattering working channel and other information for the master control end and the slave control end of the scattering link respectively. The scattering communication vehicle and scattering equipment are all from the scattering communication vehicle resource information table;

[0096] (3) After completing the scattering link planning, the scattering link planning module generates a scattering link planning table. Each scattering link information includes the scattering link identifier Ln, the link master control end planning configuration information, and the link slave control end planning configuration information. Among them, the link master control end planning configuration information includes the geographical location of the master control end (longitude Bz / latitude Lz / elevation Hz), the scattering communication vehicle Tz information (scattering communication vehicle identifier Tz, name TNz, Beidou user number TBz), and the scattering device Dz information (scattering device identifier Dz, name DNz, transmission channel number TFz / reception channel number RFz); the link slave control station planning configuration information includes the geographical location of the slave control station (longitude Bc / latitude Lc / elevation Hc), the scattering communication vehicle Tc information (scattering communication vehicle identifier Tc, name TNc, Beidou user number TBc), and the scattering device Dc information (scattering device identifier Dc, name DNc, transmission channel number TFc / reception channel number RFc).

[0097] like Figure 3 As shown, the steps for processing the scatter link establishment notification are as follows:

[0098] (4) The network management center personnel start the scatter link scheduling module, which reads and displays the scatter link list planned by the scatter link planning module;

[0099] (5) After the network management center personnel select a scattering link Ln to be opened from the scattering link list and start sending the scattering link establishment notification message, the scattering link scheduling module sends a scattering link establishment notification message to the scattering communication vehicle Tz (Beidou device user number TBz) of the master control end of the selected link Ln through the Beidou SMS device. The scattering link establishment notification message carries the following contents: the longitude Bz / latitude Lz / elevation Hz of the master control end, the scattering device identifier Dz of the master control end, the sending channel number TFz / receiving channel number RFz of the master control end; the longitude Bc / latitude Lc / elevation Hc of the slave control end site, the scattering device identifier Dc of the slave control end, the sending channel number TFc / receiving channel number RFc of the slave control end, and the Beidou user number TBc of the slave control end;

[0100] (5) The network management center personnel continue to select other scatter links that need to be opened and complete the issuance of corresponding scatter link establishment notifications until all scatter link establishment notifications are issued.

[0101] like Figure 4 As shown, the steps for processing a scatter link establishment request are as follows:

[0102] (6) After the scattering link control module of the scattering communication vehicle Tz receives the scattering link establishment notification message sent by the network management center, it obtains the planning configuration information of the vehicle (i.e., the link master) and the planning configuration information of the link peer site from the link establishment notification message, including: the longitude Bz / latitude Lz / elevation Hz of the vehicle, the scattering device identifier Dz of the vehicle, the sending channel number TFz / receiving channel number RFz of the vehicle; the longitude Bc / latitude Lc / elevation Hc of the slave control end, the scattering device identifier Dc of the slave control end, the sending channel number TFc / receiving channel number RFc of the slave control end, and the Beidou user number TBc of the slave control end;

[0103] (7) The scattering communication vehicle Tz determines whether it has reached the planned position of the master control end of the link to be established. If it has not yet reached the planned position of the master control end, it sends a scattering link establishment request (moving) message to the scattering communication vehicle Tc (Beidou user number TBc) at the slave control end, and continues to drive to the planned position of the master control end until it reaches the planned position of the master control end; if it has reached the planned position of the master control end, it sends a scattering link establishment request (ready) message to the scattering communication vehicle Tc (Beidou user number TBc) at the slave control end. The content of the scattering link establishment request message includes: the longitude Bz / latitude Lz / elevation Hz of the master control end, the status of the master control end (ready / moving); the longitude Bc / latitude Lc / elevation Hc of the slave control end planned by the system, the scattering device identifier Dc, the sending channel number TFc / receiving channel number RFc;

[0104] (8) After the scatter communication vehicle Tz arrives at the planned position of the master control end, the parking direction of the scatter communication vehicle Tz is calculated based on the longitude Bz / latitude Lz / elevation Hz of the vehicle and the longitude Bc / latitude Lc / elevation Hc of the slave control station, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scatter communication vehicle Tz is adjusted manually first;

[0105] (9) The scattering communication vehicle Tz calculates the deployment direction of the scattering antenna based on the acquired information of its own longitude Bz / latitude Lz / elevation Hz and the slave control station longitude Bc / latitude Lc / elevation Hc, and deploys the antenna of the scattering device Dz according to the calculation result. Then, the operating frequency of the scattering device Dz is set to the transmitting channel number TFz / receiving channel number RFz, and prepares to execute the scattering link handshake activation process.

[0106] like Figure 5 As shown, the scatter link establishment response processing steps are as follows:

[0107] (10) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link control module of the scattering communication vehicle Tc can learn that the short message comes from the Beidou user number TBz. After parsing the link establishment request message, the information obtained includes: the status of the vehicle at the master control end (ready / moving), the longitude Bz / latitude Lz / elevation Hz of the vehicle at the master control end; the longitude Bc / latitude Lc / elevation Hc of the vehicle planned by the system, the scattering device identifier Dc, and the sending channel number TFc / receiving channel number RFc;

[0108] (11) The scattering communication vehicle Tc determines whether the vehicle has reached the longitude and latitude position of the vehicle planned by the system. If the vehicle has reached the planned position, step (12) is directly executed. Otherwise, after sending a scattering link establishment response (moving) message to the master control end scattering communication vehicle Tz (Beidou user number TBz), the vehicle continues to drive towards the planned position of the scattering communication vehicle Tc until it reaches the planned position and then executes step (12);

[0109] (12) After the scattered communication vehicle Tc reaches the longitude and latitude position of the vehicle planned by the system, the parking direction of the scattered communication vehicle Tc is calculated according to the longitude Bz / latitude Lz / elevation Hz of the main control vehicle and the longitude Bc / latitude Lc / elevation Hc of the vehicle, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scattered communication vehicle Tc is adjusted manually first;

[0110] (13) The scattering communication vehicle Tc calculates the deployment direction of the scattering antenna according to the longitude Bz / latitude Lz / elevation Hz of the main control vehicle and the longitude Bc / latitude Lc / elevation Hc of the own vehicle, and deploys the antenna with the scattering device Dc according to the calculation result. Then, it sends a scattering link establishment response (ready) message to the scattering communication vehicle Tz (Beidou user number TBz), and sets the working frequency of the scattering device Dc to the sending channel number TFc / receiving channel number RFc. Then, it sends a link establishment waiting instruction to the local scattering device Dc, and the scattering device Dc immediately enters the scattering link air interface signal detection state.

[0111] like Figure 6 As shown in the figure, the scatter link handshake opening process steps are as follows:

[0112] (14) After receiving the scattering link establishment response (ready) message sent by the scattering communication vehicle Tc, the scattering link control module of the scattering communication vehicle Tz checks whether the vehicle has completed the processing flow of the scattering link establishment request. If the scattering link establishment request processing process has been completed, step (15) is directly executed; otherwise, step (15) needs to be executed after the scattering link establishment request processing process is completed;

[0113] (15) The scattering link control module of the scattering communication vehicle Tz sends a link negotiation start instruction to the scattering device Dz, and then enters the link handshake negotiation process between the scattering devices. The general process is as follows: a) The scattering device Dz starts the scattering link handshake negotiation on the scattering link air interface and sends a link handshake signal; b) After detecting the link handshake signal, the scattering device Dc automatically enters the scattering link handshake negotiation state and sends a link handshake response signal; c) After detecting the link handshake response signal, the scattering device Dz enters the antenna fine alignment and link negotiation stage with the scattering device Dc until the scattering transmission link is opened;

[0114] (16) After issuing the link negotiation start command, the scattering link control module of the scattering communication vehicle Tz can collect the scattering link status information from the scattering device Dz in real time and determine whether the scattering link has been opened.

[0115] In summary, the present invention builds a scattering communication system, which is composed of a network management center node and a number of scattering communication vehicle nodes. The present invention is responsible for scattering link planning and scattering link scheduling through the network management center node, and sends scattering link establishment notifications; the scattering communication vehicle node is responsible for specific scattering link control, and cooperates with the opposite scattering communication vehicle node to complete the scattering link establishment request, scattering link establishment response and link handshake opening process of the relevant scattering link according to the scattering link establishment notification information content. The present invention adopts Beidou short message as the basic control channel, which can conveniently and flexibly realize scattering link networking scheduling, and is suitable for scattering link establishment in the opening stage of the scattering communication system, and is also suitable for dynamic adjustment of scattering links in the network operation stage.

Claims

1. A scattering communication link control method based on centralized planning and scheduling strategy, characterized in that: The following steps are involved: (1) A Beidou SMS module is configured in the network management center and each scatter communication vehicle as the basic signaling control channel. The Beidou SMS module includes positioning and orientation functions. Each scatter communication vehicle obtains the latitude, longitude and altitude information of its location through the Beidou SMS module; (2) According to the needs of communication transmission, the scattering link planning module of the network management center is used to plan the scattering link topology and plan the list of scattering links that need to be opened; (3) For each scatter link that needs to be opened, the scatter link scheduling module of the network management center sends a link establishment notification message to the scatter communication vehicle Tz, the master control end of the link, through the Beidou SMS module; (4) After receiving the link establishment notification message sent by the network management center, the scattering link control module of the scattering communication vehicle Tz executes the scattering link establishment request processing flow: sending a scattering link establishment request message to the scattering communication vehicle Tc at the slave control end, and completing the preparation work before the opening of the scattering link at the local end after arriving at the planned position of the master control end, including adjusting the parking direction of the vehicle, deploying the scattering antenna, and setting the working frequency of the scattering equipment; (5) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link establishment response processing flow is executed: a scattering link establishment response message is sent to the scattering communication vehicle Tz at the link master end, and after arriving at the planned position at the slave end, the preparation work before the opening of the scattering link at the local end is completed, including adjusting the parking direction of the local vehicle, unfolding the scattering antenna, setting the working frequency of the scattering device, and finally setting the scattering device Dc of the local vehicle to the link establishment waiting state; (6) After the scattering link control module of the scattering communication vehicle Tz receives the scattering link establishment response message sent by the scattering communication vehicle Tc, it executes the scattering link handshake opening process: if the scattering communication vehicle Tz has not completed the scattering link establishment request process, it waits for the scattering communication vehicle Tz to complete the scattering link establishment request process; after the scattering communication vehicle Tz completes the scattering link establishment request process, it starts the scattering link handshake negotiation process. The scattering communication vehicles at both ends realize link handshake negotiation and fine alignment of scattering antennas through scattering signals. After the negotiation at both ends is completed, the scattering link is opened; (7) When a scattering node fails or a scattering link needs to be adjusted, repeat steps (2) to (6) to adjust and reconstruct the scattering network links.

2. According to claim 1, a scattering communication link establishment control method based on centralized planning and scheduling strategy is characterized in that: In step (2), the process of scatter link topology planning is as follows: (201) Use the scatter link planning module of the network management center to establish and maintain the scatter communication vehicle resource information table, which is used to store the scatter communication vehicle information used by the system; the information of each scatter communication vehicle includes the scatter communication vehicle identification, the scatter communication vehicle name, the Beidou equipment user number and one or more sets of vehicle-mounted scattering equipment information, and each set of vehicle-mounted scattering equipment information includes the scattering equipment identification, the scattering equipment name, and the scattering equipment type; (202) using the scatter link planning module of the network management center to complete the planning of one or more scatter links, the scatter link planning content includes: determining the longitude and latitude positions of the stations at both ends of the scatter link; determining the station at one end of the link as the master control end and the other end as the slave control end, and configuring the associated scatter communication vehicle, scatter equipment, and scatter working channel information for the master control end and the slave control end of the scatter link respectively, wherein the scatter communication vehicle and scatter equipment are all from the scatter communication vehicle resource information table; (203) After the scatter link planning is completed, the scatter link planning module generates a scatter link planning table, where each scatter link information includes a scatter link identifier Ln, link master end planning configuration information, and link slave end planning configuration information; wherein the link master end planning configuration information includes: The geographical location of the master terminal, i.e. longitude Bz, latitude Lz, and altitude Hz, Information of scattering communication vehicle Tz, namely, scattering communication vehicle identification Tz, name TNz, Beidou user number TBz, Scattering device Dz information, namely, scattering device identifier Dz, name DNz, transmission channel number TFz and reception channel number RFz; The planning and configuration information of the link slave station includes: From the geographical location of the control station, that is, longitude Bc, latitude Lc, and altitude Hc, Scattering communication vehicle Tc information, namely, scattering communication vehicle identification Tc, name TNc, Beidou user number TBc, Scattering device Dc information, namely, scattering device identifier Dc, name DNc, transmission channel number TFc and reception channel number RFc.

3. According to claim 1, a scattering communication link establishment control method based on centralized planning and scheduling strategy is characterized in that: In step (3), the process of sending the link establishment notification message is as follows: (301) Starting a scattering link scheduling module of the network management center, the scattering link scheduling module reads and displays a scattering link list planned by the scattering link planning module; (302) A scattering link Ln to be opened is selected from the scattering link list and a scattering link establishment notification message is started to be sent. The scattering link scheduling module sends a scattering link establishment notification message to the scattering communication vehicle Tz at the master control end of the selected link Ln through the Beidou SMS device. The Beidou device user number of the scattering communication vehicle Tz at the master control end of the selected link Ln is TBz. The contents of the scattering link establishment notification message include: the longitude Bz, latitude Lz, and altitude Hz of the master, the scattering device identifier Dz of the master, the sending channel number TFz and the receiving channel number RFz of the master; the longitude Bc, latitude Lc, and altitude Hc of the slave site, the scattering device identifier Dc of the slave, the sending channel number TFc and the receiving channel number RFc of the slave, and the Beidou user number TBc of the slave; (303) Continue to select other scattering links that need to be opened and complete the corresponding scattering link establishment notification issuance until all scattering link establishment notifications are issued.

4. According to claim 1, a scattering communication link establishment control method based on centralized planning and scheduling strategy is characterized in that: In step (4), the scatter link establishment request processing flow is as follows: (401) After receiving the scattering link establishment notification message sent by the network management center, the scattering link control module of the scattering communication vehicle Tz obtains the planning configuration information of the vehicle, that is, the link master control end, and the planning configuration information of the link peer site from the link establishment notification message, including: the longitude Bz, latitude Lz, and altitude Hz of the vehicle, the scattering device identifier Dz of the vehicle, the sending channel number TFz and the receiving channel number RFz of the vehicle, the longitude Bc, latitude Lc, and altitude Hc of the slave control end, the scattering device identifier Dc of the slave control end, the sending channel number TFc and the receiving channel number RFc of the slave control end, and the Beidou user number TBc of the slave control end; (402) The scattering communication vehicle Tz determines whether the vehicle has reached the planned position of the master control end of the link to be established. If the vehicle has not reached the planned position of the master control end, it sends a scattering link establishment request message marked as moving to the slave control end scattering communication vehicle Tc, and continues to drive to the planned position of the master control end until it reaches the planned position of the master control end. The Beidou user number of the slave control end scattering communication vehicle Tc is TBc; if the vehicle has reached the planned position of the master control end, it sends a scattering link establishment request message marked as ready to the slave control end scattering communication vehicle Tc; the scattering link establishment request message includes: the longitude Bz, latitude Lz, and altitude Hz of the master control end, the state of the master control end, the longitude Bc, latitude Lc, and altitude Hc of the slave control end planned by the system, the scattering device identifier Dc, the sending channel number TFc, and the receiving channel number RFc; the state of the master control end is ready or moving; (403) After the scatter communication vehicle Tz arrives at the planned position of the master control end, the parking direction of the scatter communication vehicle Tz is calculated based on the acquired longitude Bz, latitude Lz, elevation Hz of the vehicle and the longitude Bc, latitude Lc, elevation Hc of the slave control station, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scatter communication vehicle Tz is manually adjusted first; (404) The scattering communication vehicle Tz calculates the deployment direction of the scattering antenna based on the acquired information of the vehicle's longitude Bz, latitude Lz, altitude Hz and the longitude Bc, latitude Lc, altitude Hc from the control station, and deploys the antenna of the scattering device Dz according to the calculation result, then sets the working frequency of the scattering device Dz to the transmission channel number TFz and the receiving channel number RFz, and prepares to execute the scattering link handshake activation process.

5. The method for controlling scattering communication link establishment based on centralized planning and scheduling strategy according to claim 1, characterized in that: In step (5), the scatter link establishment response processing flow is as follows: (501) After receiving the scattering link establishment request message sent by the scattering communication vehicle Tz, the scattering link control module of the scattering communication vehicle Tc learns that the short message comes from the Beidou user number TBz, and parses the link establishment request message to learn the following information: the vehicle status of the master control end, the longitude Bz, latitude Lz, and altitude Hz of the master control end vehicle, the longitude Bc, latitude Lc, and altitude Hc of the vehicle planned by the system, the scattering device identifier Dc, the sending channel number TFc, and the receiving channel number RFc; (502) The scattering communication vehicle Tc determines whether the vehicle has reached the longitude and latitude position of the vehicle planned by the system. If the vehicle has reached the planned position, step (503) is directly executed. Otherwise, a scattering link establishment response message marked as moving is sent to the master control end scattering communication vehicle Tz through the Beidou user number TBz, and the vehicle continues to travel to the planned position of the scattering communication vehicle Tc until it reaches the planned position and then step (503) is executed. (503) After the scattered communication vehicle Tc reaches the longitude and latitude position of the vehicle planned by the system, the parking direction of the scattered communication vehicle Tc is calculated according to the longitude Bz, latitude Lz, and elevation Hz of the vehicle at the master control end and the longitude Bc, latitude Lc, and elevation Hc of the vehicle, and it is determined whether the parking direction needs to be adjusted. If adjustment is required, the parking direction of the scattered communication vehicle Tc is manually adjusted first; (504) The scattering communication vehicle Tc calculates the deployment direction of the scattering antenna according to the longitude Bz, latitude Lz, altitude Hz of the main control vehicle and the longitude Bc, latitude Lc, altitude Hc of the vehicle itself, and deploys the antenna with the scattering device Dc according to the calculation result. Then, the scattering communication vehicle Tc sends a scattering link establishment response message marked as ready to the scattering communication vehicle Tz through the Beidou user number TBz, and sets the working frequency of the scattering device Dc to the sending channel number TFc and the receiving channel number RFc. Then, the link establishment waiting instruction is sent to the scattering device Dc on the local side, and the scattering device Dc immediately enters the scattering link air interface signal detection state.

6. The method for controlling scattering communication link establishment based on centralized planning and scheduling strategy according to claim 1, characterized in that: In step (6), the scatter link handshake opening process is as follows: (601) After receiving the scattering link establishment response message sent by the scattering communication vehicle Tc and marked as ready, the scattering link control module of the scattering communication vehicle Tz checks whether the vehicle has completed the processing flow of the scattering link establishment request. If the scattering link establishment request processing process has been completed, step (602) is directly executed. Otherwise, it needs to wait until the scattering link establishment request processing process is completed before executing step (602); (602) The scattering link control module of the scattering communication vehicle Tz sends a link negotiation start instruction to the scattering device Dz, and then enters the link handshake negotiation process between the scattering devices. The process is as follows: a) The scattering device Dz starts the scattering link handshake negotiation on the scattering link air interface and sends a link handshake signal; b) After detecting the link handshake signal, the scattering device Dc automatically enters the scattering link handshake negotiation state and sends a link handshake response signal; c) After detecting the link handshake response signal, the scattering device Dz enters the antenna fine alignment and link negotiation phase with the scattering device Dc until the scattering transmission link is opened; (603) After issuing the link negotiation start instruction, the scattering link control module of the scattering communication vehicle Tz collects the scattering link status information from the scattering device Dz in real time and determines whether the scattering link has been opened.

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