CN206894698U - A kind of track traffic wireless communication system based on TD LTE - Google Patents

Abstract

The utility model discloses a kind of track traffic wireless communication system based on TD LTE, using the IP-based flattening network architecture, two groups of network transmitting sub-systems of A, B including providing communication port for each business end of application layer, two groups of network transmitting sub-systems of A, B are using the redundancy bearing mode work simultaneously of double nets；Each transmission subsystem includes the TD LTE core network module EPC and network management system positioned at core layer, positioned at the distributed base station eNB of Access Layer, and the vehicle-mounted access terminal TAU positioned at terminating layer.The system has interconnect between perfect TD LTE networks interface and function, possesses multiple business access bearer capability, can be provided for business application system it is reliable, redundancy, can flexibly reconstruct the transparent transmission channel of configuration.

Description

A kind of track traffic wireless communication system based on TD-LTE

Technical field

The utility model belongs to track traffic radio communication technology field, more particularly to a kind of track based on TD-LTE Traffic wireless communication system.

Background technology

At present, the wireless communication technology that urban track traffic industry uses mainly have TETRA (TErrestrial TRunked Radio), GSM (global system for mobile communications), CDMA (CDMA communication), 3G (3rd generation mobile communication technology), Wi-Fi (wireless offices Domain net) etc., it can be divided into commercial wireless communication, private radio communication and point-to-train communication by application.Wherein professional radio communication Business is broadly divided into three parts：Voice scheduling business using TETRA as representative, ensure that CBTC (control automatically by the train based on communication System processed) Wi-Fi network, vehicle-mounted PIS (passenger information system) and CCTV (closed-circuit television) professional Wi-Fi network.Three kinds Business is each independent and independent networking, and cost is higher, and Wi-Fi network has problems with：Wi-Fi station location is more, is tieed up in tunnel Shield is difficult；Wi-Fi high-speed mobiles can not ensure transmission quality, no QoS (QoS) security mechanism；Wi-Fi naturally exempts from Take open frequency, interference source is more.Therefore from build, operation, maintenance cost consider, the Wi-Fi network of TETRA, CBTC system and PIS and CCTV special Wi-Fi network investment is higher, needs to optimize.

Urban track traffic radio communication need to complete following task：Row control information is carried by communication system, passes through compartment Train operational safety is improved with the video monitoring of track, lifts passenger's with vehicle-mounted PIS business and in-car wideband switch-in business Trip experience.In face of above demand, there is an urgent need to provide a kind of collection voice, video and data based on TD-LTE radio communications to be Application scheme of the wideband digital Clustering of one in track traffic wireless communication system, i.e. subway communication system TD- LTE network is CBTC, vehicle-mounted PIS, vehicle-mounted CCTV provide passage, realizes that subway communication is wirelessly transferred networks combined.

Utility model content

To solve the above problems, the utility model proposes a kind of wireless communication system based on TD-LTE, applied to track The radio communication of traffic, for business application system provide it is reliable, redundancy, can flexibly reconstruct the transparent transmission channel of configuration.

The TD-LTE vehicle-ground wireless communications system is CBTC, vehicle-mounted PIS, vehicle-mounted CCTV and voice and video integrated dispatch are provided Passage.Concrete technical scheme is as follows：

A kind of track traffic wireless communication system based on TD-LTE, using the IP-based flattening network architecture, including Two groups of network transmitting sub-systems of A, B of communication port are provided for each business end of application layer, two groups of network transmitting sub-systems of A, B use The redundancy bearing mode work simultaneously of double nets；Each transmission subsystem includes the TD-LTE core net module EPC and net positioned at core layer Guard system, positioned at the distributed base station eNB of Access Layer, and the vehicle-mounted access terminal TAU positioned at terminating layer.

Further, distributed base station eNB includes station baseband processing unit BBU, penetrating in the communications equipment room of station The frequency remote device RRU and trackside radio frequency remote equipment RRU outside the communications equipment room of station.

Further, TD-LTE core nets module EPC and network management system pass through dedicated transmissions network and station Base-Band Processing Unit B BU connections, station baseband processing unit BBU are drawn by the radio frequency in optical fiber and trackside radio frequency remote equipment RRU and computer room Remote equipment RRU connections, and signal transmission is carried out by radio wave and vehicle-mounted access terminal TAU；A groups network transmitting sub-system and B groups network transmitting sub-system passes through vehicle-mounted access terminal TAU connection communications in terminating layer.

Further, vehicle-mounted access terminal TAU comprises at least two groups, is arranged in train head and the train tailstock.

Further, two groups of network transmitting sub-systems of A, B are 1785-1805MHz using TD-LTE frequency ranges.It is double using A/B Net redundant cover designs, and covers whole main track and test run line circuit.

Further, A groups network transmitting sub-system uses 5MHz networkings, including A nets wireless access and A net core nets；B groups Network transmitting sub-system uses 15MHz networkings, including B nets wireless access network and B core nets；The double net concurrent workings of A/B.

Further, the uplink of A groups network transmitting sub-system undertakes CBTC and vehicle-state detection, and downgoing line is held Carry on a shoulder pole CBTC；The up route of B group network transmitting sub-systems undertakes CBTC, CCTV, vehicle-state and colony dispatching, descending route road Undertake CBTC, PIS, the state of emergency and colony dispatching.

Further, application layer include CBTC, vehicle-mounted PIS, vehicle-mounted CCTV and one kind in voice and video integrated dispatch or It is a variety of.

Further, the core layer residing for the system also includes center router, center switch, passes through center router The access of realization simultaneously realizes the isolation between different business and network security demand, is realized and webmaster system by center switch System, the interaction of distributed base station eNB information.

Further, the core layer residing for the system also includes CBTC mirrored storages, is realized by CBTC mirrored storages The backup of CBTC data.

The utility model is led to using the track traffic wireless communication system based on TD-LTE mainly for conventional rails traffic The communication network of letter system is optimized, and has the advantage that as follows：

(1) wide-band mobile communication system based on TD-LTE technologies, connect with being interconnected between perfect TD-LTE networks Mouth and function, access other systems for the later stage and reserved interface, and possess multiple business access bearer capability, can be service application System provide it is reliable, redundancy, can flexibly reconstruct the transparent transmission channel of configuration.

(2) data service rate of TD-LTE technologies and the availability of frequency spectrum are high, better than narrowband systems TETRA, GSM-R, Better than WIFI, WiMAX.TD-LTE technologies can support up to 350km/h travelling performance, can solve urban railway transit train because The problem of data transmission performance declines caused by mobility.

(3) system has spectral flexibility feature, and different size of frequency spectrum can be supported to distribute, can be in different size of frequency Disposed in spectrum, including 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, and 20MHz, support paired and non-paired frequency spectrum.

(4) wide-band mobile communication system based on TD-LTE technologies, can support fine scheduling of resource granularity and flexibly Scheduling strategy, user can be distinguished from time and frequency dimension, can guarantee that service quality (Qos) demand of business.

(5) flattening networking plan is used, simplifies the network architecture, reduces NE quantity, system reliability is high；Using Flattening network structure, is effectively shortened data transmission delay end to end, more meets that urban track traffic is particularly believed Number systematic difference.

(6) application layer of the system between connection train and station provides communication port, can integrate vehicle, letter Number, will have a wide range of applications in the business information track traffic wireless communication system between the car ground of PIS, the specialty such as communication.

Brief description of the drawings

Track traffic wireless communication system frame diagrams of the Fig. 1 based on TD-LTE

Fig. 2 is that A, B net overall delineation of activities and bandwidth partition schematic diagram

Embodiment

The TD-LTE vehicle-ground wireless communications system includes two groups of network transmitting sub-systems of A, B, each transmission subsystem mainly by TD-LTE core net modules EPC, network management system, distributed base station eNB, vehicle-mounted access terminal TAU compositions, overall network framework are adopted With IP-based flattening network structure.The system is comprehensive for the CBTC in application layer, vehicle-mounted PIS, vehicle-mounted CCTV and voice and video Close scheduling (i.e. colony dispatching) and passage is provided.

A, two groups of network transmitting sub-systems of B are using the redundancy bearing mode work simultaneously of double nets, i.e., A, B dual network business are not deposited Divide in active and standby, while bearer service data, provide communication port for each business end of application layer.In each transmission subsystem, TD- LTE core network module EPC and network management system are located at core layer, and distributed base station eNB is located at Access Layer, vehicle-mounted access terminal TAU Positioned at terminating layer.

Core layer mainly includes TD-LTE core net module EPC and network management system, and center switch, center router With the equipment such as CBTC mirrored storages.

LTE core network module EPC is used for whole wireless network base station equipment, the authentication management of terminal, encryption handling, entered Invade the functions such as detection, UE ID distribution, security and switching, Roaming control, user data service management, route.Network management system It is responsible for carrying out meassge hook pipe to system network equipment and vehicle-mounted access terminal TAU (i.e. vehicle-mounted special-purpose terminal equipment TAU) Reason.The access of the system business such as signal system and PIS, CCTV is realized by center router, while is realized between different business Isolation and network security demand.Realized by center switch and interacted with wireless dispatching platform, webmaster, base station information.It is logical Cross CBTC mirrored storages and realize signal system data backup.

Access Layer, i.e. distributed base station eNB, the main station baseband processing unit included in the communications equipment room of station BBU, radio frequency remote equipment RRU, and the trackside radio frequency remote equipment RRU outside the communications equipment room of station.

Connected between core layer and Access Layer by RJ45 power ports.Station baseband processing unit BBU is connect by RJ45 power ports It is connected after entering interchanger with dedicated transmissions system equipment, to complete TD-LTE core net module EPC and network management system and station base IP interface channels needed for tape handling unit BBU；Station baseband processing unit BBU passes through the RRU and trackside in optical fiber and computer room Radio frequency remote equipment RRU connections, and signal transmission is carried out by radio wave and vehicle-mounted access terminal TAU.

Application layer mainly includes CBTC operation systems, vehicle-mounted PIS operation systems, vehicle-mounted CCTV operation systems and colony dispatching System.By wireless communication system disclosed in the utility model, i.e. two groups of network transmitting sub-systems of A and B, it is each industry of application layer Business end provides communication port, the networks combined being wirelessly transferred with realizing track traffic to communicate.

Terminating layer mainly includes a plurality of main track circuit and test run line circuit.Each train head and the tailstock are respectively by corresponding Vehicle-mounted access terminal TAU connections B groups network transmitting sub-system and A group network transmitting sub-systems, the system network inside car-mounted terminal Network system composition can use prior art to realize that here is omitted.

Further illustrated with reference to specific embodiment and accompanying drawing, as shown in figure 1, the track traffic based on TD-LTE is wireless Communication system is made up of core layer, Access Layer, terminating layer and application layer.It is specifically described as follows：

The system is concentrated in control centre's private communication computer room and places central apparatus, including the LTE cores positioned at core layer The web-transporting devices such as net module EPC, network management system, corresponding center router, center switch, and CBTC mirror images are deposited The corollary equipments such as storage, power-supply system.

BBU equipment in Access Layer is set in communications equipment room AT STATION, and BBU passes through after RJ45 power port access switch and specially Connected with Transmission system equipment, complete the IP interface channels needed for EPC and BBU；BBU passes through optical fiber and trackside RRU and canyon Interior RRU connections.

A groups network transmitting sub-system and B groups network transmitting sub-system pass through the vehicle-mounted access of terminating layer respectively in terminating layer Terminal TA U connection communications, by the vehicle-mounted access terminal TAU connection communications positioned at train head and the tailstock in embodiment, so as to It is each industry of application layer for including CBTC operation systems, vehicle-mounted PIS operation systems, vehicle-mounted CCTV operation systems and Trunked Radio System Business system provides communication port.

According to service bearer demand, in order to ensure the reliability of network, overall plan is set using the covering of A/B double-network redundants Meter, is 1785-1805MHz using TD-LTE frequency ranges.A groups network transmitting sub-system (abbreviation A nets) uses 5MHz networkings, including A Net wireless access and A net core nets；B groups network transmitting sub-system (abbreviation B nets) uses 15MHz networkings, including B net wireless access Net and B core nets, the double net concurrent workings of A/B.

Overall delineation of activities and bandwidth partition are as shown in Fig. 2 A (being located at headstock), B (being located at the tailstock) net cover whole main track And test run line circuit, the online row line of A guipures a width of 5MHz, A undertake CBTC and vehicle-state detection, downgoing line undertakes CBTC；B guipures a width of 15MHz, B route of surfing the net undertake CBTC, CCTV, vehicle-state and colony dispatching, and descending route road is held Carry on a shoulder pole CBTC, PIS, the state of emergency and colony dispatching.

The Specifeca tion speeification of the wireless communication system based on TD-LTE disclosed in embodiment is as shown in table 1：

Table 1

The visible track traffic channel radio disclosed in the utility model based on TD-LTE is analyzed by upper table performance parameter Letter system has following difference relative to conventional rails traffic communications system：

(1) frequency resource used is different：TD-LTE needs to be deployed on the special frequency resource of authorization (this programme For 1785-1805MHz).Conventional rails traffic communications system, which is operated in, exempts to permit shared band, with the system such as bluetooth, Zigbee Frequency of use resource is identical, is easily disturbed by other systems.

(2) covering and mobility support ability are different：TD-LTE possesses continuous covering power, passes through switching, cell reselection Deng more complete mobile management flow, seamless business experience can be provided the user with.Conventional rails traffic communications system exists Design object is focus covering, does not support the mobile management flows such as switching.

(3) source scheduling mode is different：TD-LTE supports fine scheduling of resource granularity and flexible scheduling strategy, can To distinguish user from time and frequency dimension, service quality (Qos) demand of business can guarantee that.Conventional rails traffic communications system The mechanism seized using being competed between user dispatches user, and at a certain moment, resource is exclusive by a user, thus number of users compared with Collision is more also easy to produce when more, the level of resources utilization is relatively low.

It is described above, the only preferable embodiment of the utility model, but the scope of protection of the utility model is not This is confined to, any one skilled in the art is in the technical scope that the utility model discloses, according to this practicality New technical scheme and its utility model design are subject to equivalent substitution or change, should all cover in protection model of the present utility model Within enclosing.

Claims (10)

1. a kind of track traffic wireless communication system based on TD-LTE, it is characterised in that use IP-based flattening network Framework, including the A groups network transmitting sub-system and B group network transmitting sub-systems of communication port are provided for each business end of application layer, A, two groups of network transmitting sub-systems of B are using the redundancy bearing mode work simultaneously of double nets；Each transmission subsystem includes being located at core layer TD-LTE core net module EPC and network management system, positioned at the distributed base station eNB of Access Layer, and the car positioned at terminating layer Carry access terminal TAU.

2. track traffic wireless communication system as claimed in claim 1, it is characterised in that distributed base station eNB includes station Baseband processing unit BBU, the radio frequency remote equipment RRU in the communications equipment room of station and the trackside outside the communications equipment room of station Radio frequency remote equipment RRU.

3. track traffic wireless communication system as claimed in claim 2, it is characterised in that TD-LTE core net module EPC and Network management system is connected by dedicated transmissions network with station baseband processing unit BBU；Station baseband processing unit BBU passes through optical fiber It is connected with the radio frequency remote equipment RRU in trackside radio frequency remote equipment RRU and computer room, and it is whole by radio wave and vehicle-mounted access TAU is held to carry out signal transmission；A, two groups of network transmitting sub-systems of B pass through vehicle-mounted access terminal TAU connection communications in terminating layer.

4. track traffic wireless communication system as claimed in claim 3, it is characterised in that vehicle-mounted access terminal TAU is at least wrapped Two groups are included, is arranged in train head and the train tailstock.

5. track traffic wireless communication system as claimed in claim 1, it is characterised in that two groups of network transmitting sub-systems of A, B The use of TD-LTE frequency ranges is 1785-1805MHz.

6. track traffic wireless communication system as claimed in claim 1, it is characterised in that A groups network transmitting sub-system uses 5MHz networkings, including A nets wireless access and A net core nets；B groups network transmitting sub-system uses 15MHz networkings, including B nets without Line access and B core nets；The double net concurrent workings of A/B.

7. track traffic wireless communication system as claimed in claim 1, it is characterised in that A group network transmitting sub-systems it is upper Row line undertakes CBTC and vehicle-state detection, and downgoing line undertakes CBTC；The up route of B group network transmitting sub-systems undertakes CBTC, CCTV, vehicle-state and colony dispatching, descending route road undertake CBTC, PIS, the state of emergency and colony dispatching.

8. track traffic wireless communication system as claimed in claim 1, it is characterised in that the application layer includes CBTC, car Carry the one or more in PIS, vehicle-mounted CCTV and voice and video integrated dispatch.

9. track traffic wireless communication system as claimed in claim 1, it is characterised in that the core layer residing for the system is also wrapped Center router, center switch are included, the access realized by center router simultaneously realizes the isolation between different business and net Network demand for security, realized by center switch and interacted with network management system, distributed base station eNB information.

10. track traffic wireless communication system as claimed in claim 1, it is characterised in that the core layer residing for the system is also Including CBTC mirrored storages, the backup of CBTC data is realized by CBTC mirrored storages.