CN105873086A - Airport surface wireless communication system and wireless terminal - Google Patents

Abstract

The invention provides an airport surface wireless communication system. The airport surface wireless communication system comprises a base station, a WiFi relay station and a data processing center. By utilizing a base station signal provided by the base station and a WiFi signal provided by the WiFi relay station, whole wireless signal coverage of an airport surface is realized; signals of each wireless terminal are fused and transmitted by utilizing a data processing center so as to construct a large-capacity and wideband transmission wireless communication system fusing a base station wireless network and a WiFi wireless network; and the system can realize whole coverage of the airport surface without large-area wire arrangement, is simple in structure, strong in expandability and strong in data fusion efficiency, and the whole operation efficiency of an airport can be effectively improved.

Description

Airport scene wireless communication system and wireless terminal

technical field

The invention relates to the technical field of airport surface communication, in particular to an airport surface wireless communication system, a wireless terminal and a method for the wireless terminal to select a communication channel.

Background technique

With the rapid development of my country's economy, the demand for civil aviation transportation continues to grow, which increases the load of airport capacity and puts forward higher requirements for the efficiency of airport operations.

At present, domestic airport surface communication technologies are divided into wired transmission and wireless transmission according to different transmission media. Wired transmission has the advantages of large capacity and low bit error rate, but there are problems such as difficult wiring design, difficult expansion in the later stage, and high expansion cost. At present, there are many wireless communication technologies in domestic airports, such as 800MHz technology, LTE technology, WiFi technology and AeroMACs technology. These wireless network communication technologies carry different services on the airport scene according to their respective characteristics. Compared with wired transmission, wireless transmission has the characteristics of simple system and strong scalability, but the various wireless communication technologies used in the current airport scene are relatively independent of each other, and the information interaction capability is weak. In addition, the data of airport surface communication comes from various system terminals, such as multi-point positioning system, radar monitoring system, video monitoring system, voice communication system, etc. These different systems usually use independent links for data transmission, but in the actual airport communication, the data of different links need to be fused, and the efficiency of cross-link data fusion is low, which affects the overall operation efficiency of the airport. On the whole, the large-capacity broadband transmission wireless communication system established by integrating multiple wireless networks can improve the operational efficiency of the airport and is an important choice for future airport surface communication.

Contents of the invention

Aiming at the defects in the prior art, the present invention provides an airport scene wireless communication system that integrates multiple wireless networks to solve the above problems, and at the same time provides a wireless terminal suitable for the airport scene wireless communication system and the wireless terminal The method by which the terminal selects a communication channel.

In the first aspect, an airport scene wireless communication system provided by the present invention includes: a base station, a WiFi relay station, and a data processing center; wherein,

The base station is located within the scope of the airport scene, and the base station is communicatively connected with the data processing center, the WiFi relay station and the wireless terminal, and is used to connect the WiFi relay station and the wireless terminal within the signal coverage of the base station. A communication link between the data processing centers and a communication link between the wireless terminal and the data processing center;

The WiFi relay station is communicatively connected with the base station and the wireless terminal, the WiFi relay station is set around the signal blind area of the base station, and is used to cover the WiFi signal to the signal blind area, so that the wireless terminal is in the wireless terminal. Connect to the WiFi relay station through a WiFi signal in the signal blind area of the base station;

The data processing center is also connected to the airport management server and the Internet, and is used for merging and forwarding the information uploaded by each wireless terminal, and realizing communication between each wireless terminal in the system, the airport management server and the Internet.

Optionally, the data processing center includes: a gateway module, an authentication module, a network management module and a data processing module;

The gateway module, authentication module and network management module are all connected to the data processing module;

The gateway module is also connected to the Internet, and is used to uniformly allocate and manage the IP addresses of each wireless terminal in the system, and realize communication between each wireless terminal in the system and the Internet;

The authentication module is used to authenticate each wireless terminal in the system, and allow the wireless terminal to access the system after the authentication is passed;

The network management module is used for unified management of the base stations, WiFi relay stations and wireless terminals in the system;

The data processing module is also connected with the base station and the airport management server, and is used for merging and forwarding the information uploaded by each wireless terminal, and realizing communication between each wireless terminal in the system and the airport management server.

Optionally, the base station includes: an AeroMACs signal transceiving module and an LTE signal transceiving module, the AeroMACs signal transceiving module and the LTE signal transceiving module are respectively used to cover the AeroMACs signal and the LTE signal to the airport scene, so that the WiFi relay station and The wireless terminal communicates with the base station through AeroMACs signals or LTE signals within the signal coverage of the base station.

Optionally, the base station further includes: a GPS antenna, configured to provide timing to the data processing center, the WiFi relay station, and the wireless terminal, so that the data processing center, the WiFi relay station, and the wireless terminal Clock synchronization.

Optionally, the WiFi relay station includes: a base station signal transceiving module and a WiFi signal conversion module connected to each other;

The base station signal transceiver module is also connected to the base station for communicating with the base station through AeroMACs signals or LTE signals;

The WiFi signal conversion module is connected with the wireless terminal, and is used to convert the AeroMACs signal or the LTE signal into a WiFi signal and send it to the wireless terminal, or convert the WiFi signal sent by the wireless terminal into an AeroMACs signal or an LTE signal for transmission to the base station signal transceiving module.

In a second aspect, the present invention provides a wireless terminal adapted to the above-mentioned airport wireless communication system, the wireless terminal is a mobile terminal or a fixed terminal; the wireless terminal includes: a base station signal transceiving module, a WiFi signal transceiving module, Dual-link judgment module and user data transceiver module;

The base station signal transceiver module is connected to the dual link decision module and the base station, and is used to communicate with the base station through the base station signal during operation; wherein the base station signal includes an AeroMACs signal or an LTE signal;

The WiFi signal transceiver module is connected to the dual-link decision module and the WiFi relay station, and is used to communicate with the WiFi relay station through WiFi signals during operation;

The dual-link judgment module is also connected with the user data transceiver module, and is used to detect the signal quality of the base station signal communication channel and the signal quality of the WiFi signal communication channel, and control the base station signal transceiver module and the signal quality of the WiFi signal communication channel according to the detection results The running or dormancy of the WiFi signal transceiver module, so that the wireless terminal communicates with the base station or the WiFi relay station through one of the communication channels, and the dual-link judgment module also communicates with the user data transceiver module communication;

The user data transceiving module is connected with the information collection device for receiving the airport scene information collected by the information collection device and uploading it to the data processing center.

Optionally, the base station signal transceiver module includes an AeroMACs signal transceiver unit, an LTE signal transceiver unit, and a base station signal decision unit;

Both the AeroMACs signal transceiving unit and the LTE signal transceiving unit are connected to the base station signal judging unit;

The AeroMACs signal transceiver unit is used to communicate with the base station by sending and receiving AeroMACs signals;

The LTE signal transceiving unit is used to communicate with the base station by transmitting and receiving LTE signals;

The base station signal judgment unit is used to detect the signal quality of the AeroMACs signal received by the AeroMACs signal transceiver unit, and detect the signal quality of the LTE signal received by the LTE signal transceiver unit, and control the The AeroMACs signal transceiving unit and the LTE signal transceiving unit are running or dormant, so that the base station signal transceiving module communicates with the base station through AeroMACs signals or LTE signals.

Optionally, the wireless terminal is a mobile terminal, and the wireless terminal further includes: a voice communication module;

The voice communication module is connected with the user data transceiving module, and is used to receive the voice input of the airport scene staff and play the voice to the airport scene staff, so as to realize the communication between the airport scene staff and other airport scene staff or Real-time communication between airport managers.

Optionally, the wireless terminal is a mobile terminal, and the wireless terminal further includes: a display and control module;

The display control module is connected with the user data transceiving module, and is used for man-machine interaction with the airport scene staff, so that the airport scene staff can query airport information through the wireless terminal.

In a third aspect, the present invention provides a method for a wireless terminal to select a communication channel, including:

The base station signal transceiver module detects AeroMACs signals and LTE signals;

The base station signal transceiver module selects a communication channel with optimal signal quality in the AeroMACs communication channel and the LTE communication channel as the communication channel for transmitting and receiving base station signals according to the detection results;

The WiFi signal transceiver module detects WiFi signals;

The dual link judgment module detects and compares the signal quality of the communication channel for transmitting and receiving base station signals and the signal quality of the communication channel for transmitting and receiving WiFi signals, and controls the operation of the base station signal transmitting and receiving module and the WiFi signal transmitting and receiving module according to the comparison result or sleep, so that the wireless terminal communicates with the base station or the WiFi relay station through a communication channel with the best signal quality.

It can be seen from the above technical solutions that the present invention provides an airport surface wireless communication system, including: a base station, a WiFi relay station and a data processing center. The base station signal provided by the base station and the WiFi signal provided by the WiFi relay station are used to realize the comprehensive wireless signal coverage of the airport scene, and the data processing center is used to fuse and forward the signals of each wireless terminal, so as to build a fusion base station wireless network and WiFi wireless network. The large-capacity broadband transmission wireless communication system of the network, this system does not need large-area wiring to achieve full coverage of the airport scene, simple structure, strong scalability, high data fusion efficiency, and can effectively improve the overall operating efficiency of the airport.

A wireless terminal and a method for selecting a communication channel for a wireless terminal provided by the present invention are used in conjunction with the airport scene wireless communication system, and are based on the same inventive concept as the above airport scene wireless communication system, and have the same beneficial effects .

Description of drawings

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the specific embodiments or the prior art. Throughout the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, elements or parts are not necessarily drawn in actual scale.

Fig. 1 shows a schematic diagram of an airport scene wireless communication system provided by the first embodiment of the present invention;

FIG. 2 shows a schematic structural diagram of a data processing center provided by a second embodiment of the present invention;

FIG. 3 shows a schematic structural diagram of a WiFi relay station provided by a third embodiment of the present invention;

FIG. 4 shows a schematic structural diagram of a wireless terminal provided by a fourth embodiment of the present invention;

FIG. 5 shows a schematic structural diagram of a mobile terminal provided by a fifth embodiment of the present invention;

FIG. 6 shows a flowchart of a wireless terminal selecting a communication channel provided by a sixth embodiment of the present invention;

Fig. 7 shows a flow chart of selecting a communication channel by the signal transceiver module of the base station provided by the seventh embodiment of the present invention;

Fig. 8 shows a flow chart of selecting a communication channel by a dual-link judging module provided by the eighth embodiment of the present invention.

detailed description

Embodiments of the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, so they are only examples, and should not be used to limit the protection scope of the present invention.

It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

AeroMACs technology, LTE technology and WiFi technology are currently used more large-capacity wireless communication technologies. Among them, AeroMACs signal and LTE signal have the characteristics of long coverage distance, usually up to 5KM ~ 10KM, but compared with WiFi signal, the penetration ability of these two signals to objects is slightly weaker, and they are easily blocked by buildings and other objects to form non-sight distance area (NLOS), and signal blind area. When deploying stations at airports, adding AeroMACs base stations or LTE base stations to make up blind spots in signal blind areas will cost a lot to build the system, so it is limited to only use AeroMACs or LTE to achieve full coverage of wireless signals on the airport scene. WiFi technology has large-capacity data transmission capabilities, and WiFi signals have strong penetrating ability to objects and are not easily affected by buildings. However, the signal coverage of WiFi base stations is relatively close, usually ranging from tens to hundreds of meters and requires terminals Movement speed is low. If only WiFi signals are used to achieve full coverage of wireless signals on the airport scene, this will lead to a large number of WiFi base stations, and the construction of airport station layout is not easy, and there are also limitations.

The present invention provides an airport scene wireless communication system, a wireless terminal and a method for the wireless terminal to select a communication channel. The embodiments of the present invention will be described below with reference to the accompanying drawings.

Please refer to FIG. 1 , which shows a schematic diagram of an airport surface wireless communication system provided by a first embodiment of the present invention. As shown in FIG. 1, an airport scene wireless communication system provided according to the first embodiment of the present invention includes: a base station 101, a WiFi relay station 102, and a data processing center 103; wherein,

The base station 101 is located within the scope of the airport scene, and the base station 101 is communicatively connected with the data processing center 103, the WiFi relay station 102 and the wireless terminal 104, so as to be within the signal coverage of the base station 101 connecting the communication link between the WiFi relay station 102 and the data processing center 103 and connecting the communication link between the wireless terminal 104 and the data processing center 103;

The WiFi relay station 102 is communicatively connected with the base station 101 and the wireless terminal 104, and the WiFi relay station 102 is arranged around the signal blind area of the base station 101, and is used to cover the WiFi signal to the signal blind area, so that all The wireless terminal 104 is connected to the WiFi relay station 102 through a WiFi signal within the signal blind area of the base station 101;

The data processing center 103 is also connected to the airport management server and the Internet, and is used to fuse and forward the information uploaded by each wireless terminal 104, and realize the communication between each wireless terminal 104 in the system and the airport management server and the Internet .

Wherein, the wireless terminal 104 can be a mobile terminal or a fixed terminal, and is used to collect information within the scope of the airport scene and upload it to the data processing center 103, and can also be used for real-time communication or information query by airport staff. The airport management server includes an air traffic control station server, an airline server, etc., and the data processing center 103 can upload various forms of data such as video, voice, and image to the airport management server, or receive the airport management server. The data and instructions issued by the server realize the interactive communication between the airport scene wireless communication system and the airport management server.

The airport scene wireless communication system provided by the embodiment of the present invention utilizes the base station signal provided by the base station 101 and the WiFi signal provided by the WiFi relay station 102 to realize the comprehensive wireless signal coverage of the airport scene, and utilizes the data processing center 103 for each wireless terminal 104 The signals are fused and forwarded to build a large-capacity broadband transmission wireless communication system that integrates the base station wireless network and the WiFi wireless network. The wireless terminal 104 can directly communicate with the base station 101 through the base station signal within the coverage area of the base station signal. , can be connected to the WiFi relay station 102 through the WiFi signal, and then connected to the base station 101 through the WiFi relay station 102 through the base station signal. This system does not need large-area wiring to achieve full coverage of the airport scene, simple structure, strong scalability, and data fusion. High efficiency can effectively improve the overall operation efficiency of the airport.

Please refer to FIG. 2 , which shows a schematic structural diagram of the data processing center 103 provided by the second embodiment of the present invention. As shown in Figure 2, the data processing center 103 includes: a gateway module, an authentication module, a network management module and a data processing module;

The gateway module, authentication module and network management module are all connected to the data processing module;

The gateway module is also connected to the Internet, and is used to uniformly allocate and manage the IP addresses of each wireless terminal 104 in the system, and realize communication between each wireless terminal 104 in the system and the Internet;

The authentication module is used to authenticate each wireless terminal 104 in the system, and allow the wireless terminal 104 to access the system after the authentication is passed;

The network management module is used for unified management of the base station 101, WiFi relay station 102 and wireless terminal 104 in the system;

The data processing module is also connected with the base station 101 and the airport management server, and is used for merging and forwarding the information uploaded by each wireless terminal 104, and realizing communication between each wireless terminal 104 in the system and the airport management server. Communication.

In Figure 2, base station users include airport management servers such as air traffic control station servers and airline servers, and the external network is the Internet.

Among them, the data processing module can integrate and process the collected data and send them to their respective destination terminals. The data processing module uses this system to collect, process, integrate and distribute various data to improve the operating efficiency of the system.

The gateway module is a bridge between the system and the internet (Internet), realizing the interconnection between the system and the internet. The gateway module also has the DHCP capability to uniformly allocate and manage the IP addresses of users in the system.

The authentication module is the security guarantee of this system. In order to ensure the security of the system, each wireless terminal 104 needs to be registered and authenticated by the authentication module before it can access the system, so as to realize the information interaction of the terminal users in the system and avoid harmful behaviors such as data eavesdropping.

The network management module can perform unified management on the base station 101, fixed terminal, mobile terminal and WiFi relay station 102 in the system. The network management module has two modes: query and control:

a) Query mode: Through the network management module, you can query the working status of the base station 101, fixed terminal, mobile terminal and WiFi relay station 102 in the system, such as the connection status between the base station 101 and the terminal, the uplink and downlink communication modulation mode between the base station 101 and the terminal, and the uplink and downlink communication rate, etc.

b) Control mode: through the network management module, the working state of the base station 101 can be controlled, such as the base station 101 can be controlled to transmit AeroMACs signals and LTE signals at the same time or the base station 101 can be controlled to transmit only one of the wireless signals.

In an embodiment provided by the present application, the base station 101 includes: an AeroMACs signal transceiving module and an LTE signal transceiving module, and the AeroMACs signal transceiving module and the LTE signal transceiving module are respectively used to cover the AeroMACs signal and the LTE signal to the airport scene, To make the WiFi relay station 102 and the wireless terminal 104 communicate with the base station through AeroMACs signal or LTE signal within the signal coverage of the base station 101 .

In an embodiment provided by the present application, the base station 101 further includes: a GPS antenna, used for time service to the data processing center 103, the WiFi relay station 102 and the wireless terminal 104, so that the data processing center 103. Clock synchronization between the WiFi relay station 102 and the wireless terminal 104.

In an embodiment provided by the present application, the WiFi relay station 102 includes: a base station signal transceiving module and a WiFi signal conversion module connected to each other;

The base station signal transceiver module is also connected to the base station 101 for communicating with the base station 101 through AeroMACs signals or LTE signals;

Described WiFi signal conversion module is connected with described wireless terminal 104, is used for converting AeroMACs signal or LTE signal into WiFi signal and sends to described wireless terminal 104, or the WiFi signal that described wireless terminal 104 sends is converted into AeroMACs signal or The LTE signal is sent to the base station signal transceiving module. As shown in FIG. 3 , it is a schematic structural diagram of the WiFi relay station 102 provided by the third embodiment of the present invention.

In order to ensure the communication quality between the WiFi relay station 102 and the base station 101, the base station signal transceiver module needs to include a channel quality detection mechanism. By detecting and comparing the signal quality of the AeroMACs communication channel and the signal quality of the LTE communication channel, a higher signal quality is selected. One of the communication channels communicates with the base station 101. Among them, the signal quality can be evaluated according to the following parameters: Received Signal Strength (SRRI), Link Quality Indicator (LQI) Carrier to Interference and Noise Ratio (CINR).

Please refer to FIG. 4. FIG. 4 shows a schematic structural diagram of a wireless terminal 104 provided by the fourth embodiment of the present invention. As shown in FIG. 4, the wireless terminal 104 provided by the fourth embodiment of the present invention is compatible with The wireless terminal 104 provided by the fourth embodiment of the present invention is a mobile terminal or a fixed terminal when used in conjunction with the airport scene wireless communication system provided by the present invention; the wireless terminal 104 includes: a base station signal transceiver module, a WiFi signal transceiver module , a dual-link decision module and a user data transceiver module;

The base station signal transceiver module is connected with the dual-link decision module and the base station 101, and is used to communicate with the base station 101 through a base station signal during operation; wherein the base station signal includes an AeroMACs signal or an LTE signal;

The WiFi signal transceiving module is connected with the dual-link decision module and the WiFi relay station 102, and is used to communicate with the WiFi relay station 102 through WiFi signals during operation;

The dual-link judgment module is also connected with the user data transceiver module, and is used to detect the signal quality of the base station signal communication channel and the signal quality of the WiFi signal communication channel, and control the base station signal transceiver module and the signal quality of the WiFi signal communication channel according to the detection results The operation or dormancy of the WiFi signal transceiver module, so that the wireless terminal 104 communicates with the base station 101 or the WiFi relay station 102 through one of the communication channels, and the dual-link decision module also communicates with the user data transceiver module communicate between

The user data transceiving module is connected with the information collection device for receiving the airport scene information collected by the information collection device and uploading it to the data processing center 103 .

In Fig. 4, other communication modules are information collection devices.

Wherein, the base station signal transceiving module is an important transceiving device for the mobile terminal to maintain a direct connection with the base station 101 . Because the base station 101 can send two kinds of wireless signals, AeroMACs signal and LTE signal, in order to ensure the communication quality between the mobile terminal and the base station 101, the transceiver module of the base station 101 needs to evaluate the communication quality of these two signal links, and then select the one with better communication quality. A signal link communicates with the base station 101. Evaluation decision conditions and related thresholds are defined by Received Signal Strength (SRRI), Link Quality Indicator (LQI), and Carrier to Interference and Noise Ratio (CINR).

The evaluation of the communication quality of the two signal links by the base station signal transceiver module can be divided into 3 steps:

1) A decision link is used to detect whether there are AeroMACs signals in the entire frequency band in the current wireless environment. If there is no AeroMACs signal, continue to detect. If there is an AeroMACs signal, record all AeroMACs signals and their link communication quality. Another decision link detects LTE signals in the same way as AeroMACs detects the link.

2) Judging whether the detected AeroMACs signal has only one link, if there is only one link, then directly enter the next step of judgment; if there are more than one link, select the link with the best communication quality and enter the next step of judgment. The steps for the LTE signal detection link are the same.

3) Compare and judge AeroMACs link quality and LTE link quality, select the link with the best link quality as the path, and the other link is in a dormant state.

In order to ensure that only one link is in the access state, the dual-link judgment module needs to use the dual-link judgment evaluation mechanism to detect and evaluate the two links of the base station signal and the WiFi signal. The steps for the dual-link judgment module to detect and evaluate the two links of the base station signal and the WiFi signal are as follows:

1) Determine whether there is a WiFi signal in the wireless environment, if there is no WiFi signal, the system continues to detect, if there is a WiFi signal, the system selects the link with the best link quality, and proceeds to the next step;

2) Judging whether the base station signal transceiver module has a link in the path, if there is no link, then the judgment system continues to detect, if there is a path link, then enter the next step;

3) Comparing the quality of the communication link of the base station and the quality of the WiFi communication link, the system chooses one link to maintain the path, and the other one is in a dormant state.

In one embodiment provided by the present invention, the base station signal transceiving module includes an AeroMACs signal transceiving unit, an LTE signal transceiving unit and a base station signal judging unit;

Both the AeroMACs signal transceiving unit and the LTE signal transceiving unit are connected to the base station signal judging unit;

The AeroMACs signal transceiver unit is used to communicate with the base station 101 by sending and receiving AeroMACs signals;

The LTE signal transceiving unit is configured to communicate with the base station 101 by transmitting and receiving LTE signals;

The base station signal judgment unit is used to detect the signal quality of the AeroMACs signal received by the AeroMACs signal transceiver unit, and detect the signal quality of the LTE signal received by the LTE signal transceiver unit, and control the The AeroMACs signal transceiving unit and the LTE signal transceiving unit are running or dormant, so that the base station signal transceiving module communicates with the base station 101 through AeroMACs signals or LTE signals.

In an embodiment provided by the present invention, the wireless terminal 104 is a fixed terminal, and the fixed terminal maintains communication and interconnection with the base station 101 through a wireless link, and is mainly installed next to a fixed communication device (ie, an information collection device), such as a radar , camera, etc. Fixed communication devices are placed in various areas of the airport scene according to their own needs, so the wireless signals covered by the fixed communication devices may include one or more of AeroMACs signals, LTE signals and WiFi signals, and the communication of different wireless signals There are some differences in quality. In order to ensure the communication quality between the fixed terminal and the base station 101, the fixed terminal needs to use technical indicators such as received signal strength, link quality index, carrier-to-interference and noise ratio to perform channel detection, and select one of the wireless signals for connection.

In an embodiment provided by the present invention, the wireless terminal 104 is a mobile terminal, as shown in FIG. 5 , which is a schematic structural diagram of a mobile terminal provided in the fifth embodiment of the present invention. In the figure, other communication modules That is, an information collection device, the mobile terminal may further include a voice communication module and/or a display and control module to realize corresponding functions.

For example, the mobile terminal further includes: a voice communication module;

The voice communication module is connected with the user data transceiving module, and is used to receive the voice input of the airport scene staff and play the voice to the airport scene staff, so as to realize the communication between the airport scene staff and other airport scene staff or Real-time communication between airport managers.

As another example, the mobile terminal further includes: a display and control module;

The display control module is connected with the user data transceiving module, and is used for man-machine interaction with the airport scene staff, so that the airport scene staff can query airport information through the wireless terminal 104 .

The mobile terminal is connected to the base station 101 through wireless signals, and is mainly held by ground staff or installed on mobile vehicles such as airport vehicles. The mobile terminal can realize three functions by configuring corresponding modules:

a) The mobile terminal is connected to sensors such as cameras and uploads sensor information to the base station 101 in real time. Taking the camera as an example, the mobile terminal uploads the image collected by the camera to realize the mobile monitoring function of the airport scene.

b) The mobile terminal is equipped with a display and control module. The display and control module can realize the human-computer interaction ability of the ground staff, which is convenient for the staff to query the required information.

c) The mobile terminal is equipped with a voice communication module. The voice communication module and the display and control module jointly realize the real-time communication function between the base station staff and the ground staff and the ground staff, and can convey information such as requests and orders.

The movement area of the mobile terminal covers the entire scene of the airport, especially the main movement area of the mobile terminal in the airport corridor and apron area. There are buildings in the airport corridor and apron area, which easily form signal blind spots. In non-signal blind areas, AeroMACs signal or LTE signal communication quality is excellent, while in signal blind areas, WiFi signal communication quality has advantages. The communication quality of different wireless signals of mobile terminals in these two areas also varies with the change of location. Therefore, there are two ways for the mobile terminal to interconnect with the base station 101:

a) The mobile terminal is directly interconnected with the base station 101 through an AeroMACs wireless link or an LTE wireless link in a non-signal blind area;

b) The mobile terminal is connected to the WiFi relay station 102 through the WiFi link in the signal blind area, and the WiFi middle street station and the base station 101 are kept interconnected through the AeroMACs signal or the LTE signal, and finally ensure the communication between the mobile terminal and the system base station.

In summary, in order to ensure the communication quality between the mobile terminal and the base station 101, the mobile terminal needs to use different technical indicators for channel monitoring, and select one of the wireless signals for connection. The technical indicators for judgment include Received Signal Strength (SRRI), Link Quality Indicator (LQI), and Carrier to Interference and Noise Ratio (CINR). Under the condition that the channel index is satisfied, a wireless signal connection is selected and maintained, and other wireless signal links are in a dormant state. When the communication quality of the wireless link that maintains the path is lower than the threshold value due to factors such as the location of the mobile terminal, other wireless signal links will be released from the dormant state, and the mobile terminal will re-judge the communication quality of each wireless signal and select an appropriate wireless link for further communication. switch to ensure communication quality. Thresholds are determined by Received Signal Strength (SRRI), Link Quality Indicator (LQI), and Carrier to Interference and Noise Ratio (CINR).

The present invention also provides a method for the wireless terminal 104 to select a communication channel, please refer to FIG. 6 , which is a flow chart for the wireless terminal 104 to select a communication channel provided by the sixth embodiment of the present invention. The embodiment of the present invention provides The method for the wireless terminal 104 to select a communication channel comprises the following steps:

Step S101: The base station signal transceiver module detects AeroMACs signals and LTE signals.

Step S102: The base station signal transceiving module selects the communication channel with the best signal quality among the AeroMACs communication channel and the LTE communication channel as the communication channel for transmitting and receiving the base station signal according to the detection result.

Step S103: The WiFi signal transceiver module detects the WiFi signal.

Step S104: The dual-link judgment module detects and compares the signal quality of the communication channel for transmitting and receiving base station signals and the signal quality of the communication channel for transmitting and receiving WiFi signals, and controls the base station signal transmitting and receiving module and the WiFi signal transmitting and receiving module according to the comparison result The module is running or dormant, so that the wireless terminal 104 communicates with the base station 101 or the WiFi relay station 102 through a communication channel with the best signal quality.

It should be noted that, in the embodiment of the present invention, the base station signal transceiver module in the WiFi relay station 102 and the base station signal transceiver module in the wireless terminal 104 need to detect the communication channel of the base station signal to select a channel with better signal quality. The detection methods of the two are roughly the same. Please refer to FIG. 7, which is a flow chart of selecting a communication channel for the base station signal transceiver module provided in the seventh embodiment of the present invention. The base station signal transceiver module selects a communication channel The steps for a channel are as follows:

1) A decision link is used to detect whether there are AeroMACs signals in the entire frequency band in the current wireless environment. If there is no AeroMACs signal, continue to detect. If there is an AeroMACs signal, record all AeroMACs signals and their link communication quality. Another decision link detects LTE signals in the same way as AeroMACs detects the link.

2) Judging whether the detected AeroMACs signal has only one link, if there is only one link, then directly enter the next step of judgment; if there are more than one link, select the link with the best communication quality and enter the next step of judgment. The steps for the LTE signal detection link are the same.

3) Compare and judge AeroMACs link quality and LTE link quality, select the link with the best link quality as the path, and the other link is in a dormant state.

In addition, the dual-link judgment module in the wireless terminal 104 needs to detect the base station signal and the WiFi signal, and then select a communication channel with better signal quality for communication. Please refer to FIG. 8 , which is the eighth embodiment of the present invention. The flow chart of the selection of the communication channel by the dual-link judgment module provided, the steps of the selection of the communication channel by the dual-link judgment module are as follows:

1) Determine whether there is a WiFi signal in the wireless environment, if there is no WiFi signal, the system continues to detect, if there is a WiFi signal, the system selects the link with the best link quality, and proceeds to the next step;

2) Judging whether the base station signal transceiver module has a link in the path, if there is no link, then the judgment system continues to detect, if there is a path link, then enter the next step;

3) Comparing the quality of the base station communication link and the quality of the WiFi communication link, the system chooses one link to maintain the path, and the other one is in a dormant state.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

It should be noted that the flowcharts and block diagrams in the accompanying drawings show the architecture, functions and operations of possible implementations of systems, methods and computer program products according to multiple embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. The device embodiments described above are only illustrative, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. All of them should be covered by the scope of the claims and description of the present invention.

Claims (10)

1. An airport scene wireless communication system is characterized in that, comprising: a base station, a WiFi relay station and a data processing center; wherein, The base station is located within the scope of the airport scene, and the base station is communicatively connected with the data processing center, the WiFi relay station and the wireless terminal, and is used to connect the WiFi relay station and the wireless terminal within the signal coverage of the base station. A communication link between the data processing centers and a communication link between the wireless terminal and the data processing center; The WiFi relay station is communicatively connected with the base station and the wireless terminal, the WiFi relay station is set around the signal blind area of the base station, and is used to cover the WiFi signal to the signal blind area, so that the wireless terminal is in the wireless terminal. Connect to the WiFi relay station through a WiFi signal in the signal blind area of the base station; The data processing center is also connected to the airport management server and the Internet, and is used for merging and forwarding the information uploaded by each wireless terminal, and realizing communication between each wireless terminal in the system, the airport management server and the Internet. 2. The airport scene wireless communication system according to claim 1, wherein the data processing center comprises: a gateway module, an authentication module, a network management module and a data processing module; The gateway module, authentication module and network management module are all connected to the data processing module; The gateway module is also connected to the Internet, and is used to uniformly allocate and manage the IP addresses of each wireless terminal in the system, and realize communication between each wireless terminal in the system and the Internet; The authentication module is used to authenticate each wireless terminal in the system, and allow the wireless terminal to access the system after the authentication is passed; The network management module is used for unified management of the base stations, WiFi relay stations and wireless terminals in the system; The data processing module is also connected with the base station and the airport management server, and is used for merging and forwarding the information uploaded by each wireless terminal, and realizing communication between each wireless terminal in the system and the airport management server. 3. airport scene wireless communication system according to claim 1, it is characterized in that, described base station comprises: AeroMACs signal transceiving module and LTE signal transceiving module, described AeroMACs signal transceiving module and LTE signal transceiving module are used for sending to airport respectively The scene covers the AeroMACs signal and the LTE signal, so that the WiFi relay station and the wireless terminal communicate with the base station through the AeroMACs signal or the LTE signal within the signal coverage of the base station. 4. The airport scene wireless communication system according to claim 3, wherein the base station also includes: a GPS antenna for time service to the data processing center, the WiFi relay station and the wireless terminal, so that The clocks of the data processing center, the WiFi relay station and the wireless terminal are synchronized. 5. The airport scene wireless communication system according to claim 1, wherein the WiFi relay station comprises: a base station signal transceiver module and a WiFi signal conversion module connected to each other; The base station signal transceiver module is also connected to the base station for communicating with the base station through AeroMACs signals or LTE signals; The WiFi signal conversion module is connected with the wireless terminal, and is used to convert the AeroMACs signal or the LTE signal into a WiFi signal and send it to the wireless terminal, or convert the WiFi signal sent by the wireless terminal into an AeroMACs signal or an LTE signal for transmission to the base station signal transceiving module. 6. A wireless terminal adapted to the airport surface wireless communication system according to any one of claims 1 to 5, wherein the wireless terminal is a mobile terminal or a fixed terminal; the wireless terminal includes: Base station signal transceiver module, WiFi signal transceiver module, dual-link judgment module and user data transceiver module; The base station signal transceiver module is connected to the dual link decision module and the base station, and is used to communicate with the base station through the base station signal during operation; wherein the base station signal includes an AeroMACs signal or an LTE signal; The WiFi signal transceiver module is connected to the dual-link decision module and the WiFi relay station, and is used to communicate with the WiFi relay station through WiFi signals during operation; The dual-link judgment module is also connected with the user data transceiver module, and is used to detect the signal quality of the base station signal communication channel and the signal quality of the WiFi signal communication channel, and control the base station signal transceiver module and the signal quality of the WiFi signal communication channel according to the detection results The running or dormancy of the WiFi signal transceiver module, so that the wireless terminal communicates with the base station or the WiFi relay station through one of the communication channels, and the dual-link judgment module also communicates with the user data transceiver module communication; The user data transceiving module is connected with the information collection device for receiving the airport scene information collected by the information collection device and uploading it to the data processing center. 7. The wireless terminal according to claim 6, wherein the base station signal transceiving module comprises an AeroMACs signal transceiving unit, an LTE signal transceiving unit and a base station signal decision unit; Both the AeroMACs signal transceiving unit and the LTE signal transceiving unit are connected to the base station signal judging unit; The AeroMACs signal transceiver unit is used to communicate with the base station by sending and receiving AeroMACs signals; The LTE signal transceiving unit is used to communicate with the base station by transmitting and receiving LTE signals; The base station signal judgment unit is used to detect the signal quality of the AeroMACs signal received by the AeroMACs signal transceiver unit, and detect the signal quality of the LTE signal received by the LTE signal transceiver unit, and control the The AeroMACs signal transceiving unit and the LTE signal transceiving unit are running or dormant, so that the base station signal transceiving module communicates with the base station through AeroMACs signals or LTE signals. 8. The wireless terminal according to claim 6, wherein the wireless terminal is a mobile terminal, and the wireless terminal further comprises: a voice communication module; The voice communication module is connected with the user data transceiving module, and is used to receive the voice input of the airport scene staff and play the voice to the airport scene staff, so as to realize the communication between the airport scene staff and other airport scene staff or Real-time communication between airport managers. 9. The wireless terminal according to claim 6, wherein the wireless terminal is a mobile terminal, and the wireless terminal further comprises: a display and control module; The display control module is connected with the user data transceiving module, and is used for man-machine interaction with the airport scene staff, so that the airport scene staff can query airport information through the wireless terminal. 10. A method for a wireless terminal to select a communication channel according to any one of claims 6 to 9, characterized in that it comprises: The base station signal transceiver module detects AeroMACs signals and LTE signals; The base station signal transceiver module selects a communication channel with optimal signal quality in the AeroMACs communication channel and the LTE communication channel as the communication channel for transmitting and receiving base station signals according to the detection results; The WiFi signal transceiver module detects WiFi signals; The dual link judgment module detects and compares the signal quality of the communication channel for transmitting and receiving base station signals and the signal quality of the communication channel for transmitting and receiving WiFi signals, and controls the operation of the base station signal transmitting and receiving module and the WiFi signal transmitting and receiving module according to the comparison result or sleep, so that the wireless terminal communicates with the base station or the WiFi relay station through a communication channel with the best signal quality.