WO2017000574A1

WO2017000574A1 - Train-to-ground communication network system

Info

Publication number: WO2017000574A1
Application number: PCT/CN2016/074753
Authority: WO
Inventors: 周成栋; 黄亮
Original assignee: 南方银谷科技有限公司
Priority date: 2015-06-29
Filing date: 2016-02-27
Publication date: 2017-01-05
Also published as: CN105704740A

Abstract

Disclosed is a train-to-ground communication network system, which comprises a ground subsystem and an onboard subsystem. The ground subsystem comprises several wayside wireless units. The onboard subsystem comprises an onboard wireless unit for wireless communication with the several wayside wireless units. Each wayside wireless unit comprises one wayside wireless access point (AP) and a wayside antenna matching and connected to the wayside wireless AP. The several wayside wireless units are arranged at intervals. The onboard wireless unit comprises two onboard wireless APs and onboard antennas matching and connected to the two onboard wireless APs. The two onboard wireless APs and the matching onboard antennas thereof respectively are mounted at the head of a train and the tail of the train. The onboard wireless APs are connected via a wireless link to the wayside wireless APs. The present invention employs the wireless APs and the matching antennas connected thereto to provide a train-to-ground communication network with a bandwidth greater than 300 Mbps. At the same time, by means of load-sharing, the train-to-ground bandwidth is expanded, network disconnection is prevented when either end becomes faulty, and the stability of the train-to-ground communication network is ensured.

Description

Train land communication network system

Technical field

The invention relates to the field of subway information service technology, in particular to a train car ground communication network system.

Background technique

At present, the train and land communication network adopts GSM-R (Global System for Mobile Communications-Railway), 3G, 4G or WLAN technologies, and its actual bandwidth is generally less than 100Mbps, which cannot provide passengers when the subway train is fully loaded. High bandwidth network access experience. At the same time, due to the long subway line, its network communication equipment is distributed along the line and on the train, which brings inconvenience to the network commissioning and operation and maintenance inspection. At present, there is no effective monitoring network operation status.

Summary of the invention

The object of the present invention is to provide a train communication network system with high bandwidth and good stability.

In order to solve the above technical problems, the present invention adopts the technical solution as described below. A train vehicle communication network system includes a ground subsystem and an onboard subsystem, the ground subsystem including a plurality of trackside wireless units, the onboard subsystem including a vehicle for wireless communication with the plurality of trackside wireless units a wireless unit; each of the trackside wireless units includes a trackside wireless access point (AP) and a trackside antenna coupled to the trackside wireless AP, the plurality of trackside wireless units being spaced apart; the in-vehicle wireless unit The utility model comprises two sets of vehicle-mounted wireless APs and a vehicle-mounted antenna connected with two sets of vehicle-mounted wireless APs, wherein the two sets of vehicle-mounted wireless APs and their supporting vehicle-mounted antennas are respectively installed at the train head and the train tail, and the vehicle-mounted wireless AP and the trackside The wireless AP performs a wireless link connection.

Preferably, the ground subsystem further comprises a control center system and a station Ethernet system, the rail The side wireless AP is connected to the station Ethernet system via a fiber optic link for transmitting data of the trackside wireless unit to the control center system.

Preferably, the control center system comprises a core switch, a wireless controller and a router, and the wireless controller is used for managing an in-vehicle wireless unit and a plurality of trackside wireless units, the core switch and the router are used to make the station Ethernet system Connected with the external Internet.

Preferably, the station Ethernet system is a 10 Gigabit Ethernet transmission network.

Preferably, the in-vehicle subsystem further includes an in-vehicle LAN switch, and the in-vehicle LAN switch has a built-in network sending program for initiating data traffic to the ground subsystem.

Preferably, the trackside wireless AP and the in-vehicle wireless AP perform wireless bridge communication using an 802.11ac protocol wireless technology.

Preferably, the trackside antenna is a two-sided MIMO trackside antenna, and the trackside wireless AP is connected to the trackside antenna through a feeder.

Preferably, the vehicle antenna is a MIMO vehicle antenna, and the vehicle wireless AP is connected to a vehicle antenna.

Preferably, the trackside antenna and the vehicle antenna are both 3-in and 3-out antennas.

An advantageous technical effect of the present invention is that the present invention includes a plurality of trackside wireless units and a vehicle-mounted wireless unit, and each of the trackside wireless units includes a trackside wireless AP and a trackside antenna connected to the trackside wireless AP, and the in-vehicle wireless unit includes Two sets of car wireless APs and car antennas connected with two sets of car wireless APs, two sets of car wireless APs and their supporting car antennas are installed at the train head and the train tail respectively, and the car wireless AP and the trackside wireless AP perform wireless chain. Road connection. The invention adopts the trackside wireless AP and the trackside antenna and the vehicle wireless AP to be connected with the vehicle antenna, so that the bandwidth of the train vehicle communication network is greater than 300 Mbps, which is 10 times the actual bandwidth of the existing 4G wireless communication technology. At the same time, the present invention can not only be provided by the on-board wireless AP and the supporting vehicle antenna in the load sharing mode of the train head and the train tail. Effectively increase the bandwidth of the vehicle, and when there is a fault at one end, the network will not be interrupted, which ensures the stability of the vehicle communication network.

DRAWINGS

1 is a schematic diagram of a train car ground communication network system according to an embodiment of the present invention.

2 is a schematic diagram of an embodiment of the present invention applied to a subway.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments in order to provide a further understanding of the invention.

Referring to Figure 1, there is shown a schematic diagram of a train car communication network system in accordance with an embodiment of the present invention. In an embodiment of the present invention, the train vehicle communication network system includes a ground subsystem and an onboard subsystem, the ground subsystem includes a plurality of trackside wireless units, and the vehicle subsystem includes wireless communication with a plurality of trackside wireless units. Car wireless unit. Each trackside wireless unit includes a trackside wireless AP (ACESS POINT access point) and a trackside antenna that is coupled to the trackside wireless AP, and a number of trackside wireless units are spaced apart. The vehicle wireless unit includes two sets of vehicle wireless APs and a vehicle antenna connected with two sets of vehicle wireless APs. Two sets of vehicle wireless APs and their supporting vehicle antennas are respectively installed at the train head and the train tail, and the vehicle wireless AP and the trackside wireless The AP performs a wireless link connection. By using the trackside wireless AP and the trackside antenna and the vehicle wireless AP to connect with the vehicle antenna, the bandwidth of the vehicle communication network can be greater than 300 Mbps. At the same time, by setting the vehicle wireless AP and the supporting vehicle antenna in the load sharing mode of the train head and the train tail, the vehicle ground bandwidth can be effectively expanded, and when one end fails, the network will not be interrupted, and the vehicle-ground communication network is ensured. Stability.

Specifically, the ground subsystem also includes a control center system and a station Ethernet system. Trackside wireless AP The fiber-optic link is connected to the station Ethernet system, and the station Ethernet system is used to transmit the data of the trackside wireless unit to the control center system. The station Ethernet system also includes a line aggregation switch. Preferably, the station Ethernet system transmits the data of the trackside wireless unit to the line aggregation switch and then to the control center system. Through the fiber link connection, the station Ethernet system provides network bandwidth for the trackside wireless AP, so that a number of trackside wireless units and the station Ethernet system form an interconnected transmission network. Accordingly, the station Ethernet system can be placed on the track side. The network connection data of the wireless unit is sent to the control center system for comprehensive management.

Preferably, in this embodiment, the control center system includes a core switch, a wireless controller, and a router. The wireless controller is used to manage the in-vehicle wireless unit and a number of trackside wireless units, and the core switches and routers are used to connect the station Ethernet system to the external Internet.

Preferably, the station Ethernet system is a 10 Gigabit Ethernet transmission network. The 10 Gigabit Ethernet transmission network has a long transmission distance and a maximum transmission distance of 40 km, so it is sufficient to cover the coverage of the metro station LAN. Secondly, the 10 Gigabit Ethernet transmission system can provide more bandwidth and processing capacity, which not only effectively saves investment in the subway vehicle network transmission system, but also maintains the compatibility of Ethernet, easy to use and easy to upgrade.

In this embodiment, the in-vehicle subsystem further includes an in-vehicle LAN switch, and the in-vehicle LAN switch has a built-in network sending program for initiating data traffic to the ground subsystem. The in-vehicle LAN switch can not only transmit IP traffic to the designated IP address server on the ground, but also monitor the rate of data packets, packet loss, and calculate real-time network bandwidth, packet loss, and delay. The triggering command or the timing task is used to trigger the above test process, and the network performance report is generated in the server program, thereby fully grasping the wireless link between the train vehicle subsystem and the ground subsystem, and conveniently grasping the control and timely information of the abnormal information. deal with.

Preferably, in some preferred embodiments, the trackside wireless AP and the in-vehicle wireless AP adopt 802.11ac Protocol wireless technology for wireless bridging communications. Designed specifically for the 5GHz band, 802.11ac supports MIMO (Multiple-Input Multiple-Output) technology, which can improve the throughput performance of existing wireless network technologies to the Gigabit network level. With this communication protocol, the wireless communication between the trackside wireless AP and the in-vehicle wireless AP can be realized faster and more stably.

Preferably, the trackside antenna is a two-sided MIMO trackside antenna, and the trackside wireless AP is connected to the trackside antenna through a feeder. MIMO technology refers to the use of multiple transmit and receive antennas at the transmitting end and the receiving end, respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby improving communication quality. It can make full use of space resources and achieve multiple transmission and reception through multiple antennas. It can double the system channel capacity without increasing the spectrum resources and antenna transmit power, showing obvious advantages and being regarded as the next generation mobile. The core technology of communication. In this embodiment, each trackside wireless AP is connected to the two-sided MIMO trackside antenna to support the operation of two 5Ghz bands in the AP. Preferably, each trackside wireless AP is connected to the two side trackside antennas via a feed line. The trackside wireless unit is deployed along the tunnel and overhead, and each trackside wireless unit is spaced 200-300 meters apart. The signal is extended to the two-side trackside antenna through the feeder line, and the two-side trackside antenna covers the space between the adjacent trackside wireless APs. Seamless roaming, good signal strength and low material cost.

Preferably, the vehicle antenna is a MIMO vehicle antenna, and the vehicle wireless AP is connected to a vehicle antenna. Two sets of on-board wireless units are arranged on the train, which are respectively arranged at the train head and the train tail. The in-vehicle wireless unit includes an in-vehicle wireless AP and a vehicle-mounted antenna, and the in-vehicle wireless AP is connected to a vehicle-mounted antenna. For example, at the position of the train head, the vehicle-mounted antenna is disposed closer to the head of the train than the in-vehicle wireless AP, and the vehicle antenna is at the position of the train tail. It is placed closer to the rear of the train relative to the in-vehicle wireless AP. Through the train head and the train tail, a total of two 5Ghz band devices cooperate with the trackside wireless AP to carry out link load sharing to increase the train to ground bandwidth. Preferably, the trackside antenna and the vehicle antenna are three-in and three-out MIMO antennas to achieve wider coverage of wireless signals and higher strength of wireless signals.

The above description is only a preferred embodiment of the invention, and is not intended to limit the invention in any way. A person skilled in the art can make various equivalent changes and modifications on the basis of the above embodiments, and all equivalent changes or modifications made within the scope of the claims should fall within the scope of the present invention.

Claims

A train car ground communication network system, comprising: a ground subsystem and an onboard subsystem, the ground subsystem comprising a plurality of trackside wireless units, the onboard subsystem comprising wireless with the plurality of trackside wireless units In-vehicle wireless unit for communication;

Each of the trackside wireless units includes a trackside wireless access point (AP) and a trackside antenna connected to the trackside wireless AP, and the plurality of trackside wireless units are spaced apart;

The in-vehicle wireless unit includes two sets of in-vehicle wireless APs and a vehicle-mounted antenna connected with two sets of in-vehicle wireless APs, and the two sets of in-vehicle wireless APs and their supporting vehicle antennas are respectively installed at the train head and the train tail, and the vehicle-mounted The wireless AP is connected to the trackside wireless AP for wireless link.
A train-car communication network system according to claim 1, wherein said ground subsystem further comprises a control center system and a station Ethernet system, said trackside wireless AP passing said fiber link to said station Ethernet The system is connected, and the station Ethernet system is configured to transmit data of the trackside wireless unit to the control center system.
The train vehicle communication network system according to claim 2, wherein said control center system comprises a core switch, a wireless controller and a router, and said wireless controller is configured to perform on-board wireless unit and a plurality of trackside wireless units. Management, the core switch and router are used to connect the station Ethernet system with the external Internet.
A train-car communication network system according to claim 3, wherein said station Ethernet system is a 10 Gigabit Ethernet transmission network.
The train vehicle communication network system according to claim 1, wherein the vehicle-mounted subsystem further comprises an in-vehicle LAN switch, and the in-vehicle LAN switch has a built-in network packet issuing program for initiating data traffic to the ground subsystem.
A train vehicle communication network system according to claim 1, wherein said track side is absent The line AP and the in-vehicle wireless AP use the 802.11ac protocol wireless technology for wireless bridging communication.
The train-car communication network system according to claim 1, wherein the track-side antenna is a two-sided MIMO trackside antenna, and the trackside wireless AP is connected to the trackside antenna through a feeder.
The train vehicle communication network system according to claim 1, wherein the vehicle antenna is a MIMO vehicle antenna, and the vehicle wireless AP is connected to a vehicle antenna.
A train-car communication network system according to claim 7 or 8, wherein the track-side antenna and the vehicle-mounted antenna are both 3-in and 3-out antennas.