CN112399521A - Heterogeneous network scheduling method and device for rail transit and gateway equipment - Google Patents
Heterogeneous network scheduling method and device for rail transit and gateway equipment Download PDFInfo
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- CN112399521A CN112399521A CN202011235365.4A CN202011235365A CN112399521A CN 112399521 A CN112399521 A CN 112399521A CN 202011235365 A CN202011235365 A CN 202011235365A CN 112399521 A CN112399521 A CN 112399521A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
- H04W40/246—Connectivity information discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/535—Allocation or scheduling criteria for wireless resources based on resource usage policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
Abstract
The invention discloses a heterogeneous network scheduling method for rail transit, which comprises the steps of calculating the network bandwidth of a rail train at the current moment through a bandwidth-channel QoS index relation equation formed by training, according to a QoS index acquired in real time, continuously maintaining and calibrating a network bandwidth heat map along a track according to the calculated network bandwidth, calculating the running position of the train at the next moment according to the current position and the current running speed of the train, and finally directly reading the network bandwidth which can be provided by different communication networks from the train to the position point at the next moment from the network bandwidth heat map so as to make a network switching and load balancing strategy in advance. The method directly reads the future network state of the train from the network bandwidth heat map, is more accurate compared with the traditional method for predicting the future network state of the high-speed train by using the current network state, has more scientific routing strategy generated in advance, and is favorable for ensuring the stability of train network connection.
Description
Technical Field
The present invention relates to a method for scheduling a heterogeneous network, and in particular, to a method, an apparatus, and a gateway device for scheduling a heterogeneous network for rail transit.
Background
At present, vehicle-mounted gateway devices including rail transit mainly provide internet access services for passengers through satellite communication and connection with public networks provided by mobile operators. However, due to the complex network environment along the train running line, the switching between different network systems and different network channels, load balancing, etc. affect the quality of train-ground communication service.
Patent CN201310121589.6 discloses a communication system and method applied to vehicles, which provides a communication gateway composed of CPE (a mobile signal access device) connected to the public network of the operator and satellite ground equipment connected to the communication satellite, and a network switching method is that the system performs routing processing according to the signal strength of the two wireless networks. However, the network switching method is not suitable for a train running at a high speed, and during the high-speed running process of the train, the wireless network signal strength acquired by a communication system in the previous second is changed in the next second, so that the network state acquired at the current moment cannot represent the actual network state in the next second, and the generated network switching strategy is obvious in lag, network blockage and data packet loss can be caused, and the passenger internet experience is influenced.
Disclosure of Invention
The invention aims to provide a heterogeneous network scheduling method, a heterogeneous network scheduling device and a gateway device for rail transit, so as to solve the technical problem.
The technical scheme adopted by the invention for solving the technical problem is that,
the heterogeneous network scheduling method for rail transit comprises the following steps:
step S1, gateway equipment arranged on the rail train executes a default routing strategy;
step S2, collecting QoS index of communication channel in real time and uploading;
step S3, acquiring and uploading positioning information and running speed information of the rail train in running in real time;
step S4, determining whether the relation equation of bandwidth-channel QoS index is completely trained,
if so, uploading the QoS index, the positioning information of the rail train and the running speed information which are collected in real time to a cloud server;
if not, entering the bandwidth-channel QoS index relational training process;
step S5, the cloud server calculates network bandwidths provided by different communication networks at the current position of the rail train according to the QoS indexes acquired in real time and based on the bandwidth-channel QoS index relational expression, and continuously maintains and calibrates a network bandwidth heat map along the rail based on the calculated network bandwidths;
step S6, the cloud server calculates the position of the rail train at the next moment according to the position point and the current running speed of the rail train at the current moment, and then directly reads the network bandwidth of the rail train at the position point at the next moment from the network bandwidth heat map to generate and send a routing strategy;
step S7, the gateway device executes the issued routing policy.
As a preferred aspect of the present invention, the process of training the bandwidth-channel QoS indicator relation equation includes:
step L1, starting a dynamic bandwidth test to acquire and upload real-time dynamic bandwidth information of different network channels along the track;
and L2, the cloud server trains and forms the bandwidth-channel QoS index relation equation according to the real-time dynamic bandwidth information of the rail train at each driving position point and the QoS index acquired in real time.
As a preferable aspect of the present invention, the QoS indicator includes any one or more of an operator code of the communications operator, a signal strength indicator of a received communication signal, a reference signal received power, a reference signal received quality, a signal-to-noise ratio, a bit error rate, and a delay.
As a preferred embodiment of the present invention, the bandwidth-channel QoS index relation equation is generated through neural network learning.
The invention also provides a heterogeneous network scheduling device for rail transit, which can realize the heterogeneous network scheduling method, the heterogeneous network scheduling device comprises a vehicle-mounted gateway device and a cloud server in communication connection with the vehicle-mounted gateway device, and the vehicle-mounted gateway device specifically comprises:
the QoS index acquisition module is used for acquiring and uploading QoS indexes of communication channels in real time;
the dynamic bandwidth acquisition module is used for acquiring and uploading dynamic bandwidth data of each large communication operator at each position point along the running line of the rail train in real time;
the train positioning and running speed monitoring module is used for acquiring and uploading positioning information and running speed information of the rail train in running in real time;
the cloud server specifically comprises:
the relation training completion judging module is used for judging whether the bandwidth-channel QoS index relation equation is trained;
the dynamic bandwidth test instruction generation module is connected with the relational training completion judgment module and is used for generating and issuing a dynamic bandwidth test instruction when the bandwidth-channel QoS index relational equation training is judged to be not completed;
the network bandwidth heat map drawing and correcting module is used for drawing and correcting the network bandwidth heat map along the track according to the real-time dynamic bandwidth information of the track train at each driving position point;
the bandwidth-channel QoS index relation equation learning module is used for learning and forming the bandwidth-channel QoS index relation equation according to the QoS index acquired in real time and the real-time dynamic bandwidth information;
the network bandwidth calculation module is connected with the bandwidth-channel QoS index relation equation learning module and used for calculating network bandwidths provided by different communication networks at the current position of the rail train according to the QoS indexes acquired in real time and based on the bandwidth-channel QoS index relation;
the network bandwidth heat map drawing and correcting module is connected with the network bandwidth calculating module and is used for continuously maintaining and calibrating the network bandwidth heat map along the track according to the calculated network bandwidth;
the train running position calculating module is used for calculating the position of the rail train at the next moment according to the position and the running speed of the rail train at the current moment;
the network bandwidth reading module is respectively connected with the train running position calculation module and the network bandwidth heat map drawing and correcting module and is used for directly reading network bandwidths which can be provided by different communication networks at a position point of the next moment when the rail train runs from the network bandwidth heat map;
and the routing strategy generation module is connected with the network bandwidth reading module and used for generating and issuing a routing strategy in advance according to the read network bandwidth.
The invention also provides a rail transit vehicle-mounted gateway device which comprises a gateway device main body, a mobile communication antenna and an antenna multiplexing device, wherein the gateway device main body arranged in a rail transit train carriage combines output multi-channel radio frequency signals together through the antenna multiplexing device and outputs the combined output multi-channel radio frequency signals to the mobile communication antenna arranged at the top of a train, a core board and a power supply source for supplying working voltage to the core board are arranged in the gateway device main body, and a main control chip, and mobile communication equipment, satellite positioning equipment, Wifi communication equipment and data storage equipment which are electrically connected with the main control chip are arranged on the core board.
As a preferred aspect of the present invention, the antenna multiplexing device is an antenna combiner.
As a preferred scheme of the present invention, the number of the mobile communication devices is at least 3, each of the mobile communication devices includes 3 mobile communication modules, and the 3 mobile communication modules respectively support public networks provided by three communication operators of china mobile, china telecom and china unicom.
According to the method, a bandwidth-channel QoS index relation equation formed by training is used, the network bandwidth of the rail train at the current moment is calculated according to the QoS index collected in real time, the network bandwidth heat map along the track is continuously maintained and calibrated according to the calculated network bandwidth, the running position of the train at the next moment is calculated according to the current position and the current running speed of the train, and finally the network bandwidths which can be provided by different communication networks from the train running to the next moment position point are directly read from the network bandwidth heat map so as to make a network switching and load balancing strategy in advance. The invention has the following beneficial effects:
1. compared with a mode of predicting the future network state of the train by the current network state, the method has the advantages that the future network state of the train is read out more accurately directly from the continuously maintained and calibrated network bandwidth heat map, a routing strategy generated according to the read-out network state is more scientific, network blockage and data packet loss are obviously reduced, the stability of network connection of the high-speed train is further improved, and the internet experience of passengers is greatly improved.
2. The method takes the actual uplink and downlink bandwidths along the train as the standard for judging the quality of the communication network along the track, and judges the quality of the communication network more scientifically and accurately by comparing the strength of the network signal.
Drawings
Fig. 1 is a flowchart illustrating a method for scheduling a heterogeneous network according to an embodiment of the present invention;
fig. 2 is a schematic diagram of internal logic modules of a vehicle-mounted gateway device in a heterogeneous network scheduling apparatus according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating internal logic modules of a cloud server in a heterogeneous network scheduling apparatus according to an embodiment of the present invention;
fig. 4 is a schematic diagram of the gateway device main body connecting the mobile communication antenna through the antenna multiplexing apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
An embodiment of the present invention provides a heterogeneous network scheduling method for rail transit, as shown in fig. 1, including:
step S1, gateway equipment arranged on the rail train executes a default routing strategy;
step S2, collecting QoS index of communication channel in real time and uploading; QoS metrics include, but are not limited to, operator code of the communication operator, RSSI (received signal strength indication), RSRP (reference signal received power), RSRQ (reference signal received quality), SIR (signal to noise ratio), BER (bit error rate), delay.
Step S3, acquiring positioning information and running speed information of the rail train in running in real time;
step S4, determining whether the relation equation of bandwidth-channel QoS index is completely trained,
if so, uploading the QoS index, the positioning information of the track connection and the running speed information which are collected in real time to a cloud server;
if not, entering a bandwidth-channel QoS index relational training process;
step S5, the cloud server calculates network bandwidths provided by different communication networks at the current position of the track train based on a bandwidth-channel QoS index relational expression according to the QoS index collected in real time, and continuously maintains and calibrates a network bandwidth heat map along the track based on the calculated network bandwidths;
step S6, the cloud server calculates the position of the rail train at the next moment according to the current running speed of the position point of the rail train at the current moment, and then directly reads the network bandwidth of the position point of the rail train at the next moment from the network bandwidth heat map to generate and send a routing strategy;
the method for generating the routing strategy in advance comprises the following steps: and distributing the network request proportion of the multiple routing channels of the vehicle-mounted gateway equipment according to the calculated proportion of the network bandwidth which can be provided by different operators at the position from the train to the next moment in the total bandwidth which can be provided by all the operators.
In step S7, the gateway device executes the issued routing policy.
In the above technical solution, as shown in fig. 1, the process of training the bandwidth-channel QoS indicator relation includes:
step L1, starting a dynamic bandwidth test to acquire and upload real-time dynamic bandwidth information of different network channels along the track; it should be noted here that the dynamic bandwidth test occupies the channel bandwidth, so the dynamic bandwidth test process may affect the normal network communication of the vehicle-mounted gateway device, and cause severe network congestion, so the network bandwidth heatmap cannot be continuously maintained and calibrated by continuously performing the dynamic bandwidth test to acquire the network bandwidth of the train at the position of each time. The purpose of testing the dynamic bandwidth is to train and generate a bandwidth-channel QoS index relation equation, then calculate the network bandwidth of the rail train at the current time position according to the bandwidth-channel QoS index relation equation through the QoS index collected in real time, and continuously maintain and calibrate the network bandwidth heat map through the calculated network bandwidth.
And L2, the cloud server forms a bandwidth-channel QoS index relation equation through a neural network training according to the real-time dynamic bandwidth information of the rail train at each driving position point and the QoS index acquired in real time. Since the process of drawing and maintaining the network bandwidth heatmap and the specific learning process of the bandwidth-channel QoS index relation equation are not within the scope of the claimed invention, the process of drawing and maintaining the network bandwidth heatmap and the specific learning generation process of the bandwidth-channel QoS index relation equation are not described herein.
The invention also provides a heterogeneous network scheduling device for rail transit, which comprises a vehicle-mounted gateway device and a cloud server in communication connection with the vehicle-mounted gateway device, as shown in fig. 2, the vehicle-mounted gateway device specifically comprises:
the QoS index acquisition module is used for acquiring and uploading QoS indexes of communication channels in real time;
the dynamic bandwidth acquisition module is used for acquiring and uploading dynamic bandwidth data of each large communication operator at each position point along the running path of the rail train in real time;
the train positioning and running speed monitoring module is used for acquiring and uploading positioning information and running speed information of the rail train in running in real time;
as shown in fig. 3, the cloud server specifically includes:
the relation training completion judging module is used for judging whether the bandwidth-channel QoS index relation equation is trained;
the dynamic bandwidth test instruction generation module is connected with the relational training completion judgment module and is used for generating a dynamic bandwidth test instruction and issuing the dynamic bandwidth test instruction to the dynamic bandwidth test equipment when judging that the training of the bandwidth-channel QoS index relational equation is not completed;
the network bandwidth heat map drawing and correcting module is used for drawing and correcting the network bandwidth heat map along the track according to the real-time dynamic bandwidth information of the track train at each driving position point;
the bandwidth-channel QoS index relation equation learning module is used for learning and forming a bandwidth-channel QoS index relation equation according to the QoS index and the real-time dynamic bandwidth information which are collected in real time through a machine learning technology;
the network bandwidth calculation module is connected with the bandwidth-channel QoS index relation equation learning module and used for calculating network bandwidths provided by different communication networks at the current position of the rail train according to the QoS indexes acquired in real time and based on a bandwidth-channel QoS index relation;
the network bandwidth heat map drawing and correcting module is connected with the network bandwidth calculating module and is used for continuously maintaining and calibrating the network bandwidth heat map along the track according to the calculated network bandwidth;
the train running position calculating module is used for calculating the position of the rail train at the next moment according to the position and the running speed of the rail train at the current moment;
the network bandwidth reading module is respectively connected with the train running position calculating module and the network bandwidth heat map drawing and correcting module and is used for directly reading the network bandwidth which can be provided by different communication networks at the position points of the track train running to the next moment from the network bandwidth heat map;
and the routing strategy generation module is connected with the network bandwidth reading module and used for generating and issuing a routing strategy in advance according to the read network bandwidth. Specifically, the method for generating the routing policy may include:
and distributing the network request proportion of the multiple routing channels of the vehicle-mounted gateway equipment according to the calculated proportion of the network bandwidth which can be provided by different operators at the position from the train to the next moment in the total bandwidth which can be provided by all the operators.
The invention also provides a rail transit vehicle-mounted gateway device, as shown in fig. 4, which comprises a gateway device main body 1, a mobile communication antenna 2 and an antenna multiplexing device 3, wherein the gateway device main body 1 arranged in a rail transit train carriage combines multiple radio frequency signals output by the gateway device main body through the antenna multiplexing device 2 and outputs the combined signals to the mobile communication antenna 3 arranged at the top of a train, a core board and a power supply 11 for supplying working voltage to the core board are arranged in the gateway device main body 1, and a main control chip 12, a mobile communication device 13 electrically connected with the main control chip 12, a satellite positioning device 14, a Wifi communication device 15 and a data storage device 16 are arranged on the core board.
The functions that the main control chip 12 can implement include but are not limited to: a) an autonomous dialing and link maintenance function; b) link aggregation and load balancing functions; c) NAT network address forwarding function; d) the reset control, the state monitoring and the remote maintenance function of each device in the gateway equipment.
The mobile communication antenna 3 is installed on the roof of the rail train and is a key component for reducing the attenuation of the train-ground return network signal. The mobile communication antenna 3 employed in the present invention includes: a) the high-gain MIMO antenna supports a 5G/4G/3G operator mobile network frequency band and a WIFI and BDS/GPS satellite positioning frequency band; b) the antenna housing has the characteristics of high power transmission coefficient and high mechanical strength, and can meet the application scene requirements of a high-speed railway; c) the low attenuation and low reflection feeder line system ensures the connection stability of the communication network.
The gateway device main body 1 provided by the invention supports the output of multi-channel radio frequency signals, but because the installation condition of a train is limited, the number of the mobile communication antennas 3 arranged at the top of the carriage is limited, and the requirement of simultaneously accessing the network of a plurality of mobile communication devices 13 in the gateway device main body 1 cannot be met, so the invention ensures that the mobile communication devices 13 multiplex the mobile communication antennas 3 by adopting the antenna multiplexing device 2, and meets the requirement of simultaneously accessing the network of all the mobile communication devices 13.
In this embodiment, the antenna multiplexing device 3 preferably employs an antenna combiner.
At least 3 mobile communication modules are built in the mobile communication equipment 13, the mobile communication modules support to access to a public network provided by China Mobile or China telecom or China Unicom, preferably, 3 mobile communication modules are arranged in each mobile communication equipment, and the 3 mobile communication modules support to access to a public network provided by three communication operators of China Mobile, China telecom and China Unicom respectively.
In order to further improve the vehicle-ground communication bandwidth, it is more preferable that at least 3 mobile communication devices 13 are provided in the gateway apparatus main body 1.
The satellite positioning device 14 includes a BDS (Beidou navigation System) positioning device and a GPS positioning device, and the user acquires the real-time running speed and running position of the train car.
The Wifi communication device 15 supports protocols including but not limited to 802.11ax/802.11ac/802.11n/802.11a/802.11g/802.11b, is used for high-speed data transmission between vehicles and the ground in a station yard, and reduces the traffic cost of a mobile communication network.
The data storage device 16 is used to store device files, system operation logs, default routing policies, and the like.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (8)
1. A heterogeneous network scheduling method for rail transit is characterized by comprising the following steps:
step S1, gateway equipment arranged on the rail train executes a default routing strategy;
step S2, collecting QoS index of communication channel in real time and uploading;
step S3, acquiring and uploading positioning information and running speed information of the rail train in running in real time;
step S4, determining whether the relation equation of bandwidth-channel QoS index is completely trained,
if so, uploading the QoS index, the positioning information of the rail train and the running speed information which are collected in real time to a cloud server;
if not, entering the bandwidth-channel QoS index relational training process;
step S5, the cloud server calculates network bandwidths provided by different communication networks at the current position of the rail train according to the QoS indexes acquired in real time and based on the bandwidth-channel QoS index relational expression, and continuously maintains and calibrates a network bandwidth heat map along the rail based on the calculated network bandwidths;
step S6, the cloud server calculates the position of the rail train at the next moment according to the position point and the current running speed of the rail train at the current moment, and then directly reads the network bandwidth of the rail train at the position point at the next moment from the network bandwidth heat map to generate and send a routing strategy;
step S7, the gateway device executes the issued routing policy.
2. The heterogeneous network scheduling method for rail transit according to claim 1, wherein the process of training the bandwidth-channel QoS index relation equation comprises:
step L1, starting a dynamic bandwidth test to acquire and upload real-time dynamic bandwidth information of different network channels along the track;
and L2, the cloud server trains and forms the bandwidth-channel QoS index relation equation according to the real-time dynamic bandwidth information of the rail train at each driving position point and the QoS index acquired in real time.
3. The heterogeneous network scheduling method for rail transit according to claim 1, wherein the QoS indicator includes any one or more of an operator code of the communication operator, a signal strength indication of a received communication signal, a reference signal received power, a reference signal received quality, a signal-to-noise ratio, a bit error rate, and a time delay.
4. The heterogeneous network scheduling method for rail transit according to claim 3, wherein the bandwidth-channel QoS index relation equation is generated through neural network learning.
5. The heterogeneous network scheduling device for rail transit, which can implement the heterogeneous network scheduling method according to any one of claims 1 to 4, includes a vehicle-mounted gateway device and a cloud server communicatively connected to the vehicle-mounted gateway device, where the vehicle-mounted gateway device specifically includes:
the QoS index acquisition module is used for acquiring and uploading QoS indexes of communication channels in real time;
the dynamic bandwidth acquisition module is used for acquiring and uploading dynamic bandwidth data of each large communication operator at each position point along the running line of the rail train in real time;
the train positioning and running speed monitoring module is used for acquiring and uploading positioning information and running speed information of the rail train in running in real time;
the cloud server specifically comprises:
the relation training completion judging module is used for judging whether the bandwidth-channel QoS index relation equation is trained;
the dynamic bandwidth test instruction generation module is connected with the relational training completion judgment module and is used for generating and issuing a dynamic bandwidth test instruction when the bandwidth-channel QoS index relational equation training is judged to be not completed;
the network bandwidth heat map drawing and correcting module is used for drawing and correcting the network bandwidth heat map along the track according to the real-time dynamic bandwidth information of the track train at each driving position point;
the bandwidth-channel QoS index relation equation learning module is used for learning and forming the bandwidth-channel QoS index relation equation according to the QoS index acquired in real time and the real-time dynamic bandwidth information;
the network bandwidth calculation module is connected with the bandwidth-channel QoS index relation equation learning module and used for calculating network bandwidths provided by different communication networks at the current position of the rail train according to the QoS indexes acquired in real time and based on the bandwidth-channel QoS index relation;
the network bandwidth heat map drawing and correcting module is connected with the network bandwidth calculating module and is used for continuously maintaining and calibrating the network bandwidth heat map along the track according to the calculated network bandwidth;
the train running position calculating module is used for calculating the position of the rail train at the next moment according to the position and the running speed of the rail train at the current moment;
the network bandwidth reading module is respectively connected with the train running position calculation module and the network bandwidth heat map drawing and correcting module and is used for directly reading network bandwidths which can be provided by different communication networks at a position point of the next moment when the rail train runs from the network bandwidth heat map;
and the routing strategy generation module is connected with the network bandwidth reading module and used for generating and issuing a routing strategy in advance according to the read network bandwidth.
6. The utility model provides an on-vehicle gateway equipment of track traffic, its characterized in that, includes gateway equipment main part, mobile communication antenna and antenna multiplexing device, lays in track traffic train carriage the gateway equipment main part passes through the multiplex radio frequency signal that antenna multiplexing device will export is in the same place exports for installing at the train top mobile communication antenna, be provided with in the gateway equipment main part nuclear core plate and for nuclear core plate provides operating voltage's power supply, be provided with main control chip and electricity on the nuclear core plate mobile communication equipment, satellite positioning device, Wifi communication equipment and the data storage equipment of main control chip.
7. The rail transit vehicle-mounted gateway device of claim 6, wherein the antenna multiplexing means is an antenna combiner.
8. The rail transit vehicle-mounted gateway device according to claim 6, wherein the number of the mobile communication devices is at least 3, each mobile communication device comprises 3 mobile communication modules, and the 3 mobile communication modules respectively support public networks provided by three communication operators of China Mobile, China telecom and China Unicom.
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