CN113660641A

CN113660641A - Magnetic levitation train ground wireless communication system

Info

Publication number: CN113660641A
Application number: CN202110949543.8A
Authority: CN
Inventors: 吴冬华; 刘洁; 栾瑾; 侯圣杰; 田毅
Original assignee: CRRC Qingdao Sifang Co Ltd; Potevio Information Technology Co Ltd
Current assignee: CRRC Qingdao Sifang Co Ltd; Potevio Information Technology Co Ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2021-11-16
Anticipated expiration: 2041-08-18
Also published as: CN113660641B

Abstract

The application discloses a wireless communication system of a magnetic suspension train, the whole wireless communication system of the magnetic suspension train only works in an A network and a B network, in an overlapping area, a network cell and a network cell B are respectively managed by two adjacent partitions in the overlapping area, a network cell B is managed by a DRCUB in a first partition, a network cell A is managed by a DRCUA in a second partition, the DRCUA and the DRCUB can realize direct issuing of downlink data or transfer to an adjacent partition or direct discarding based on a target MRCU when receiving the downlink data, and can realize direct issuing of the uplink data or transfer to the adjacent partition based on a target DSC when receiving the uplink data. Therefore, according to the method and the device, through the special community administration and data transfer strategy of the overlapping area, the double-frequency redundancy of the full-line A network and the full-line B network is realized, the double-channel redundancy of the single network of the non-overlapping area is also realized, and the occupied frequency resources are less on the basis of meeting the redundancy requirement.

Description

Magnetic levitation train ground wireless communication system

Technical Field

The application relates to the technical field of train-ground communication, in particular to a magnetic levitation train-ground wireless communication system

Background

The magnetic levitation train ground wireless communication system is responsible for providing a real-time, high and reliable bidirectional wireless data transmission channel between a train and the ground, and can meet the transmission requirements of data such as magnetic levitation traffic system operation control, traction control, operation voice communication, diagnosis information, passenger information and the like. In the prior art, a maglev train ground wireless communication system adopts a pilot frequency handover mode, that is, except that an a + B pilot frequency networking is adopted in each partition to realize redundancy, in order to realize handover, two groups of different working frequencies are adopted between two adjacent partitions, and then the two adjacent partitions share a network with four frequency bands. When the vehicle is switched over, the frequency used by the MRCU on the vehicle is switched, so that the communication with the target subarea is established.

Although the mode can meet the requirement of handover, under the circumstance that the current frequency resources are scarce, the A + B pilot frequency networking already consumes a part of precious frequency resources, and the adjacent partition pilot frequency networking doubles the use requirement of frequency domain bandwidth.

Disclosure of Invention

The application aims at providing a magnetic levitation train ground wireless communication system, which realizes double-frequency redundancy of a full-line A network and a full-line B network, also realizes double-channel redundancy of a single network in a non-overlapping area, and occupies less frequency resources on the basis of meeting the redundancy requirement.

In order to solve the technical problem, the present application provides a magnetic suspension train ground wireless communication system, including DRCUA, DRCUB, RBSA generating a network cell a and RBSB generating B network cell B located in each zone, MRCUA, MRCUB, MRCUA 'and MRCUB' arranged along the length direction of the vehicle, DRCUA, MRCUA and MRCUA 'operating in the network a, DRCUB, MRCUB and MRCUB' operating in the network B, adjacent zones partially overlapping and the network cell B in the overlapping zone being governed by DRCUB in a first zone in the overlapping zone, and the network cell a in the overlapping zone being governed by cudra in a second zone in the overlapping zone;

the MRCUA and the MRCUA' are both used for transmitting uplink data and downlink data with the DRCUA which is communicated with the MRCUA; the MRCUB and the MRCUB' are both used for transmitting uplink data and downlink data with the DRCUB which is communicated with the MRCUB;

the DRCUA and the DRCUB are used for determining corresponding issuing strategies based on a target MRCU of the downlink data when the downlink data are received; when uplink data are received, determining a corresponding uplink strategy based on a target DSC of the uplink data;

the issuing strategy comprises the steps of directly issuing the downlink data by the issuing strategy, transferring the downlink data to a DRCU (distributed resource control unit) of an adjacent partition and a network which is the same as the issuing strategy, and directly discarding the downlink data; the uploading strategy comprises the steps of directly uploading the uplink data by the self and transferring the uplink data to a DRCU of an adjacent partition and the same network with the self.

Preferably, MRCUA and MRCUB are located at the head of the vehicle, and MRCUA 'and MRCUB' are located at the tail of the vehicle.

Preferably, the cells in the a network and the cells in the B network are arranged in an interlaced manner.

Preferably, the RBSA communicates with the DRCUA of the same partition through an optical fiber; the RBSB and the DRCUB of the same subarea communicate through optical fibers.

Preferably, the DRCUA and DRCUB are cross-networked with the DSCA and DSCB of the same partition.

Preferably, determining a corresponding delivery policy based on the target MRCU of the downlink data includes:

analyzing a DSC identifier and a vehicle identifier from the downlink data, and determining a target MRCU of a target vehicle based on the DSC identifier, a preset DSC-MRCU corresponding relation and the vehicle identifier;

judging whether to establish communication connection with the target MRCU;

if communication connection is established, the downlink data is directly sent to the target MRCU;

if the communication connection is not established and the DSC which issues the downlink data is the DSC of the partition where the DSC is located and only one adjacent partition is located, forwarding the downlink data to the adjacent partition;

if the communication connection is not established and the DSC which issues the downlink data is the DSC of the partition where the DSC is located and more than one adjacent partition is located, copying the downlink data and respectively sending the downlink data to each adjacent partition;

and if the communication connection is not established and the DSC which issues the downlink data is the DSC of the adjacent subarea, discarding the downlink data.

Preferably, the determining the corresponding uplink policy based on the target DSC of the uplink data includes:

resolving a DSC mark from the uplink data, and determining a target DSC based on the DSC mark;

judging whether the target DSC is the DSC of the partition where the target DSC is located;

if the DSC is the DSC of the partition where the DSC is located, the uplink data is sent to the DSC of the partition where the DSC is located;

and if the DSC is the DSC of the adjacent partition, transferring the uplink data to the DRCU of the same network as the DSC in the adjacent partition.

Preferably, the DSC is identified as DSC IP.

The application provides a magnetic levitation train ground wireless communication system, the whole magnetic levitation train ground wireless communication system only works in an A network and a B network, and in an overlapping area, an A network cell and a B network cell are separately administered by two adjacent subareas in the overlapping area. Therefore, when the area is not overlapped, the MRCUA ', the MRCUB and the MRCUB' communicate with the DRCU in the same network through the subarea where the MRCUA, the MRCUA ', the MRCUB and the MRCUB' are located to transmit uplink data and downlink data, and double-frequency redundancy of the A network and the B network and double-channel redundancy of a single network are realized. When the downlink data is received, the DRCUA and the DRCUB can directly issue the downlink data or transfer the downlink data to an adjacent partition or directly discard the downlink data based on the target MRCU, and when the uplink data is received, the uplink data can be directly issued or transferred to the adjacent partition based on the target DSC, so that the dual-frequency redundancy of the network A and the network B in the overlapping area is realized. Therefore, according to the method and the device, through the special community administration and data transfer strategy of the overlapping area, the double-frequency redundancy of the full-line A network and the full-line B network is realized, the double-channel redundancy of the single network of the non-overlapping area is also realized, and the occupied frequency resources are less on the basis of meeting the redundancy requirement.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a magnetic levitation train ground wireless communication system provided in the present application;

FIG. 2 is a schematic diagram of a magnetic levitation partition provided herein;

fig. 3 is a schematic structural diagram of another magnetic levitation train ground wireless communication system provided in the present application;

fig. 4 is a schematic diagram of a handover of a magnetic levitation train ground wireless communication system provided by the present application;

FIG. 5a is a communication state diagram of a train provided by the present application before the train travels in a non-overlapping area of a first partition and does not travel into an overlapping area of the first partition and a second partition;

fig. 5b is a communication state diagram of the train provided by the present application, starting from the time when the train enters the 15km range (cellA1) from the head of the train to the time when the train is switched into the cellA1 from the tail of the train;

fig. 5c is a train communication state diagram of the train provided by the present application, starting from the tail end of the train cutting into the cellA1 to the head end of the train cutting into the cellB 2;

FIG. 5d is a communication state diagram of the train provided by the present application, starting from the time the train enters the cellB2 from the time the train leaves the cellB 3;

fig. 5e is a train communication state diagram of the train provided by the present application from the beginning when the train enters the cellB4 to the end before the train is cut into the cellB 4;

fig. 5f is a train communication state diagram of the train provided by the present application from the beginning when the train enters the cellB4 to the end before the train is cut into the cellA 4;

fig. 5g is a train communication state diagram provided by the present application, from the tail of the train cutting into cellA4 to the time before entering the next zone switching zone.

Detailed Description

The core of the application is to provide a magnetic suspension train ground wireless communication system, double-frequency redundancy of a full-line A network and a full-line B network is realized, double-channel redundancy of a single network in a non-overlapping area is also realized, and occupied frequency resources are few on the basis of meeting redundancy requirements.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a magnetic levitation train ground wireless communication system provided in the present application.

The magnetic suspension train ground wireless communication system comprises DRCU (district wireless control unit) A1, DRCUB2, RBS (radio base station) A3 for generating A network cells and RBSB 4 for generating B network cells, MRCU (vehicle-mounted wireless control unit) A51, MRCUB52, MRCUA '53 and MRCUB' 54 which are arranged along the length direction of a train, the DRCUA 1, MRCUA 51 and MRCUA '53 work in the A network, the DRCUB2, MRCUB52 and MRCUB' 54 work in the B network, adjacent districts are partially overlapped, the B network cells in the overlapped district are governed by the DRCUB2 in the first district in the overlapped district, and the A network cells in the overlapped district are governed by the DRCUA 1 in the second district in the overlapped district;

the MRCUA 51 and MRCUA '53 are both used for transmitting uplink data and downlink data with the DRCUA 1 communicating with the MRCUA's own MRCUA; MRCUB52 and MRCUB' 54 are both used for transmitting uplink data and downlink data with DRCUB2 communicating with itself;

DRCUA 1 and DRCUB2 are used for determining corresponding issuing strategies based on a target MRCU of downlink data when the downlink data are received; when receiving the uplink data, determining a corresponding uploading strategy based on a target DSC (partition safety computer) of the uplink data;

the issuing strategy comprises the steps of directly issuing the downlink data by the issuing strategy, transferring the downlink data to a DRCU (distributed resource control Unit) of an adjacent partition and the same network with the issuing strategy, and directly discarding the downlink data; the uplink strategy comprises the steps of directly uploading uplink data by the self and transferring the uplink data to a DRCU of an adjacent partition and the same network with the self.

Referring to fig. 2, fig. 2 is a schematic diagram of magnetic levitation partition division provided in the present application. The long trunk line comprises a plurality of subareas, the length of each subarea is about 20-50km, and an overlapping area with a certain distance exists between adjacent subareas, namely a subarea switching zone.

The magnetic levitation train ground wireless communication system adopts a networking mode of A + B dual-network coverage, namely, a long trunk is simultaneously covered by an A network and a B network, wherein an RBSA 3 generates an A network cell, an RBSB 4 generates a B network cell, in the figure 1, the RBSA 3 comprises RBSA1 and RBSA2 … RBSAn, the RBSB 4 comprises RBSB1 and RBSB2 … RBSBn, the A network and the B network here show two networks with different frequencies, and the specific frequency can be set according to actual needs. In the magnetic levitation train ground wireless communication system, each partition is generally provided with a pair of DRCUs for a network a and a network B, the DRCUA 1 and the DRCUB2 communicate with a DSC through a partition local area network, the DSC comprises a DSCA and a DSCB, and the DSCA and the DSCB and the DRCUA and the DRCUB in the same partition can be networked in a crossing manner. A handoff refers to the process of a train entering a partition managed by an adjacent DSC from a partition managed by one DSC. In the process, the DSCs of the two adjacent partitions want to realize common management and control on the vehicle, that is, the VSC simultaneously has the requirement of performing wireless communication with the DSC of the current partition and the DSC of the adjacent partition, and the transmission channels of the two partitions are redundant.

In order to achieve the purpose, the method first deploys the a-network cell and the B-network cell in the overlapping area under the control of the DRCUs of different networks in adjacent partitions, so that the overlapping area is covered by A, B networks of the DRCUs of different networks in adjacent partitions. Specifically, the first partition and the second partition are any two adjacent partitions on the trunk line, the first partition and the second partition are partially overlapped, the B-network cell in the overlapping region is governed by the DRCUB2 in the first partition in the overlapping region, and the a-network cell in the overlapping region is governed by the DRCUA 1 in the second partition in the overlapping region.

Based on this, in the non-overlapping area, MRCUA 51 and MRCUA '53 communicate with DRCUA 1 of the own zone, and MRCUB52 and MRCUB' 54 communicate with DRCUB2 of the own zone. When the DRCUA 1 or the DRCUB2 receives the uplink data, the uplink data are sent to the corresponding DSC according to the preset DSC-MRCU corresponding relation; when downlink data are received, the downlink data are sent to the corresponding MRCU according to the preset DSC-MRCU corresponding relation, and therefore double-frequency redundancy and single-network double-channel redundancy can be achieved in a non-overlapping area.

When the area overlaps, the downlink data received by the DRCUA 1 and the DRCUB2 includes two cases, one is the downlink data transmitted by the DSC of the partition where the DSC is located, and the other is the downlink data forwarded by the DSCs of the adjacent partitions through the DRCUA 1 and the DRCUB2 respectively. If the data is downlink data sent by the DSC of the partition where the data is located, it needs to determine whether to directly send the downlink data or transfer the downlink data to a DRCU of an adjacent partition in the same network as the data itself according to whether the data itself establishes a communication connection with a target MRCU of the downlink data. If the DSC is the downlink data forwarded by the DRCUA 1 and the DRCUB2, it needs to determine whether to directly issue the downlink data or directly discard the downlink data according to whether to establish a communication connection with the target MRCU of the downlink data.

The uplink data received by the DRCUA 1 and the DRCUB2 include two cases, one is uplink data directly uploaded by the MRCU, and the other is uplink data forwarded by the MRCU through the DRCU of the adjacent partition. And if the target DSC of the uplink data is the DSC of the partition where the target DSC of the uplink data is located, the uplink data is directly transmitted to the corresponding DSC, and if the target DSC of the uplink data is the DSC of the adjacent partition, the uplink data is forwarded to the DRCU of the adjacent partition and the network of the target DSC of the uplink data.

Therefore, the method and the device realize the dual-frequency redundancy of the network A and the network B in the overlapping area and also realize the dual-channel redundancy of the single network in the non-overlapping area through the special cell administration and data transfer strategy in the overlapping area.

In summary, in the present application, in the overlapping area, the network a cell and the network B cell are separately administered by two adjacent partitions in the overlapping area. Therefore, when the area is not overlapped, the MRCUA 51, the MRCUA '53, the MRCUB52 and the MRCUB' 54 communicate with the DRCU in the same network through the subarea in which the MRCUA is located so as to transmit uplink data and downlink data, and the dual-frequency redundancy of the network A and the network B and the dual-channel redundancy of the single network are realized. When the data is received, the DRCUA 1 and the DRCUB2 can directly issue or transfer the downlink data to an adjacent partition or directly discard the downlink data based on the target MRCU, and when the uplink data is received, can directly issue or transfer the uplink data to an adjacent partition based on the target DSC, thereby realizing dual-frequency redundancy of the network a and the network B in the overlapping area. Therefore, according to the method and the device, through the special community administration and data transfer strategy of the overlapping area, the double-frequency redundancy of the full-line A network and the full-line B network is realized, the double-channel redundancy of the single network of the non-overlapping area is also realized, and the occupied frequency resources are less on the basis of meeting the redundancy requirement.

On the basis of the above-described embodiment:

as a preferred embodiment, MRCUA 51, MRCUB52 are located at the nose and MRCUA '53 and MRCUB' 54 are located at the tail.

In the application, the MRCUA 51 and the MRCUA '53 which are positioned in the network A and are mutually redundant are respectively arranged at the head and the tail of the vehicle, and the MRCUB52 and the MRCUB' 54 which are positioned in the network B and are mutually redundant are respectively arranged at the head and the tail of the vehicle, so that the MRCUs of the network A can not be switched from a non-overlapping area to an overlapping area or from the overlapping area to the non-overlapping area at the same time; similarly, the MRCUs of the B network do not perform network switching from the non-overlapping area to the overlapping area, or from the overlapping area to the non-overlapping area, so as to improve the reliability of the magnetic levitation train ground wireless communication system.

As a preferred embodiment, the cells in the a network and the cells in the B network are arranged in an interlaced manner.

Specifically, the network A is formed by interweaving network cells A, and the network B is formed by interweaving network cells B. In the application, the cell in the network A and the cell in the network B are arranged in an interlaced mode, so that the reliability of the magnetic levitation train ground wireless communication system is further improved.

In a preferred embodiment, the RBSA communicates with the DRCUA in the same partition through an optical fiber; the RBSB and the DRCUB of the same subarea communicate through optical fibers.

Specifically, the optical fiber communication has the advantages of long transmission distance, high transmission speed, wide transmission frequency band, large communication capacity, low loss and strong anti-interference capability. Of course, other communication methods may be used here, and the present application is not limited to this.

As a preferred embodiment, DRCUA and DRCUB are cross-networked with DSCA and DSCB of the same zone.

As a preferred embodiment, determining a corresponding delivery policy based on a target MRCU of downlink data includes:

analyzing the DSC identification and the vehicle identification from the downlink data, and determining a target MRCU of the target vehicle based on the DSC identification, the preset DSC-MRCU corresponding relation and the vehicle identification;

judging whether to establish communication connection with a target MRCU;

if the communication connection is established, the downlink data is directly transmitted to the target MRCU;

if the communication connection is not established and the DSC which issues the downlink data is the DSC of the partition where the DSC is located and more than one adjacent partition is located, the downlink data is copied and sent to each adjacent partition respectively;

and if the communication connection is not established and the DSC which issues the downlink data is the DSC of the adjacent subarea, the downlink data is discarded.

In the present application, DRCU may refer to DRCUA 1 or DRCUB 2.

Specifically, the DSC comprises DSCA and DSCB, wherein the DSCA and DSCB are cross-networked with the DRCUA and DRCUB of the same partition. When receiving the downlink data, the DRCU first parses the DCS identifier (i.e., the source IP address) and the vehicle identifier from the downlink data, and can know, through the DSC identifier, whether the downlink data is transmitted by the DSC in the partition where the DRCU is located or the downlink data forwarded by the DSC in an adjacent partition through the DRCU. The target vehicle can be determined through the vehicle identification, and the target MRCU of the target vehicle can be determined through the preset DSC-MRCU corresponding relation and the vehicle identification.

For DRCUA 1, the preset DSC-MRCU correspondence here may be, for example: DSCA-MRCUA 51, DSCB-MRCUA '53, DRCUA 1 sends the downlink data to MRCUA 51 when receiving the downlink data sent by DSCA, and sends the downlink data to MRCUA' 53 when receiving the downlink data sent by DSCB.

For DRCUB2, the preset DSC-MRCU correspondence here may be, for example: DSCA-MRCUB 52 and DSCB-MRCUB '54, DRCUB2 sends the downlink data to MRCUB52 when receiving the downlink data sent by DSCA, and sends the downlink data to MRCUB' 54 when receiving the downlink data sent by DSCB.

By means of cross networking, communication redundancy between the DSC and the DRCU can be further improved, and communication reliability is improved.

The DRCU judges whether the DRCU establishes communication connection with a target MRCU or not by searching a corresponding MRCU context, and if the communication connection is established, downlink data is sent to the target MRCU; if the corresponding MRCU context cannot be found, namely the DSC which does not establish communication connection and issues the downlink data is the DSC of the zone where the DSC is located and only one adjacent zone is available, considering that the vehicle is possibly in the adjacent zone at the moment, the downlink data is forwarded to the adjacent zone, and in practical application, an outer IP header can be packaged on an original message of the downlink data, the opposite end of the outer IP header is used by the DRCU, and the inner IP header is used by the DSC; if the communication connection is not established and the DSC which issues the downlink data is the DSC of the partition where the DSC is located and more than one adjacent partition is provided, considering that the vehicles may be in the adjacent partitions at the moment, the downlink data is copied and respectively sent to the adjacent partitions; if the DSC which does not establish communication connection and issues downlink data is the DSC of the adjacent partition, it indicates that the vehicle has not traveled to the partition, and at this time, the downlink data is discarded.

Therefore, according to the method and the device, through the special cell administration and data transfer strategy of the overlapping area, the dual-frequency redundancy of the network A and the network B of the overlapping area is realized, the dual-channel redundancy of the single network of the non-overlapping area is also realized, and the occupied frequency resources are less on the basis of meeting the redundancy requirement.

As a preferred embodiment, the determining the corresponding uploading policy based on the target DSC of the uplink data includes:

and if the DSC is the DSC of the adjacent partition, transferring the uplink data to the DRCU of the same network with the DSC in the adjacent partition.

Specifically, when receiving the uplink data, the DRCU first analyzes a DSC identifier (i.e., a destination IP address) from the uplink data, and determines a target DSC based on the DSC identifier, where there are only two possible partitions for the target DSC, one is a partition where the target DSC is located, and the other is an adjacent partition of the partition where the target DSC is located, and based on this, determines whether the target DSC is the DSC of the partition where the target DSC is located, if so, sends the uplink data to the DSC of the partition where the target DSC is located, otherwise, transfers the uplink data to a DRCU in the adjacent partition, the DRCU being in the same network as the target DSC.

As a preferred embodiment, the DSC is identified as DSC IP.

Specifically, the DSC identifier may be a DSC IP, so as to uniquely characterize the DSC of the partition, and of course, the DSC identifier may also be other types of identifiers, which is not particularly limited herein.

To facilitate understanding of the magnetic levitation train ground wireless communication system provided by the present application, the magnetic levitation train ground wireless communication system provided by the present application is further described below with reference to examples:

referring to fig. 3, fig. 3 is a schematic structural diagram of another magnetic levitation train-ground wireless communication system provided in the present application, in which DSC1A and DSC1B in DRCU1A, DRCU1B and DSC1 are located in a first partition, DSC2A and DSC2B in DRCU2A, DRCU2B and DSC2 are located in a second partition, an a-network cell of an overlapping area is governed by DRCU2A of the second partition, and a B-network cell is governed by DRCU1B of the first partition.

For the cells located in the overlapping region, i.e. for the a-network cells cellA 1-cellA 3 and the B-network cells cellB 2-cellB 3, when the DRCU1B receives the uplink data transmitted by the MRCUB52 and MRCUB '54 and the target DSC is the DSC of the second partition, the DRCU1B transfers the uplink data transmitted by the MRCUB52 and MRCUB' 54 to the DRCU 2B; when the DRCU2A receives the upstream data transmitted by MRCUA 51 and MRCUA '53 and the target DSC is the first partition, the DRCU2A transfers the upstream data transmitted by MRCUA 51 and MRCUA' 53 to DRCU 1A. Thus, for the uplink, the VSC on board may communicate with the DSC1A and DSC1B of the first partition through MRCUA 51 and MRCUA '53 of the a net and MRCUB52 and MRCUB' 54 of the B net, and may also communicate with the DSC2A and DSC2B of the second partition through MRCUA 51 and MRCUA '53 of the a net and MRCUB52 and MRCUB' 54 of the B net. The DSC of the source partition and the DSC of the destination partition are in double-network double-channel wireless connection with the vehicle-mounted VSC, and communication redundancy is guaranteed.

Referring to fig. 4, fig. 5a, fig. 5b, fig. 5c, fig. 5d, fig. 5e, fig. 5f and fig. 5g, fig. 4 is a schematic diagram of a handover of a wireless communication system for a magnetic levitation train provided by the present application, fig. 5a is a communication state diagram of a train before the train provided by the present application travels in a non-overlapping area of a first partition and does not travel into an overlapping area of the first partition and a second partition, fig. 5b is a communication state diagram of a train before the train provided by the present application enters a 15km range (cellA1) from a head to a tail cuts into cellA1, fig. 5c is a communication state diagram of a train before the train provided by the present application cuts into a cellA1 from the tail to a head before the head cuts into a cellB2, fig. 5d is a communication state diagram of a train provided by the present application before the train cuts into a cellB2 from the head to a cellB3, and fig. 5e is a communication state diagram before the train provided by the present application enters a cell 4 and a tail 4, fig. 5f is a train communication state diagram of the train provided by the present application before the train enters the cellB4 from the head of the train and the tail of the train is cut into the cellA4, and fig. 5g is a train communication state diagram of the train provided by the present application before the train enters the next zone switching zone from the tail of the train is cut into the cellA 4. It should be noted that the specific data in the figure refers to the data satisfying the transition condition mentioned above.

Taking the vehicle traveling from the first zone to the second zone as an example, the handoff process is as follows:

0. the train runs in the non-overlapping area of the first subarea, and before the train runs into the overlapping area of the first subarea and the second subarea, 4 MRCUs are all accessed to the DRCU1 network and communicate with the first subarea;

1. starting from the entry of the head into the overlap range (cut-in cellA1), MRCUA 51 first establishes a connection with DRCU2A of the second partition, then the tail cuts in cellA1 cell, MRCUA' 53 also starts establishing a connection with DRCU2A of the second partition. MRCUA 51 and MRCUA' 53 receive downstream data from DRCU2A since entering cellA1 (the downstream data is divided into two types, one type is from the DSC of the second partition, and the other type is from the DSC of the first partition, and the data is forwarded from DRCU 1A); and simultaneously transmits upstream data to DRCU2A (the upstream data is divided into two types, one is a DSC addressed to the second partition, and the other is forwarded to the DSC of the first partition via DRCU 1A). This step is short in duration.

2. After that, the head and tail are successively switched into cellB2 cell, at this time, although MRCUB52 and MRCUB' 54 are still connected with DRCU1B of the first partition, the data transmission is changed. After the MRCUB52 and the MRCUB' 54 enter the cellB2, the received downlink data from the DRCU1B is added by one type based on the original DSC data of the first partition, that is, the DSC from the second partition forwards the downlink data to the DRCU1B through the DRCU 2B; the uplink data sent to the DRCU1B is added with a type based on the original DSC data sent to the first partition, that is, the uplink data is forwarded to the second partition DSC via the DRCU2B, so as to achieve the goal of simultaneous communication and dual-network redundancy between the overlap region VSC and the first and second partitions DSC. This state is maintained for a relatively long distance.

3. From the time when the head enters the cellB4 to the time when the tail is cut into the cellB4, the MRCUB52, although still accessing the DRCU2B, first enters a state of communicating only with the second partition and is disconnected from the first partition. Starting from the tailstock entering cellB4, before the headstock cutting into cellA4, MRCUB' 54 accesses DRCU2B and also enters communication only with the second partition. At this point, MRCUA 51 and MRCUA' 53 still forward communications with DRCU1A of the first partition through DRCU 2A.

4. Starting with the tail cutting into cellA4, MRCUA' 53 disconnects from the first partition, starts to access DRCU2A, and also starts to communicate only with the second partition. Up to this point, all 4 MRCUs communicate only with the second partition, completely disconnected from the first partition. This state is maintained until the next zone switch band is entered.

And when the vehicle runs in the reverse direction, the same principle is carried out.

It should be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A magnetic suspension train ground wireless communication system is characterized by comprising DRCUA, DRCUB, RBSA for generating A network cells and RBSB for generating B network cells which are positioned in each subarea, MRCUA, MRCUB, MRCUA 'and MRCUB' which are arranged along the length direction of a train, wherein the DRCUA, the MRCUA and the MRCUA 'work in the A network, the DRCUB, the MRCUB and the MRCUB' work in the B network, adjacent subareas are partially overlapped, B network cells in an overlapping area are governed by the DRCUB in a first subarea in the overlapping area, and A network cells in the overlapping area are governed by the DRCUA in a second subarea in the overlapping area;

2. A magnetic levitation train-ground wireless communication system as recited in claim 1, wherein MRCUA, MRCUB are located at a vehicle head, and MRCUA 'and MRCUB' are located at a vehicle tail.

3. A magnetic levitation train ground wireless communication system as recited in claim 1, wherein the cells in the a-network and the cells in the B-network are interleaved.

4. A magnetic levitation train wireless communication system as recited in claim 1, wherein the RBSA communicates with the DRCUA of the same sector via optical fiber; the RBSB and the DRCUB of the same subarea communicate through optical fibers.

5. A magnetic levitation train ground wireless communication system as recited in claim 1, wherein the DRCUA and DRCUB are cross-networked with the DSCA and DSCB of the same sector.

6. A magnetic levitation train ground wireless communication system as recited in claim 5, wherein determining a corresponding delivery strategy based on the target MRCU of the downlink data comprises:

judging whether to establish communication connection with the target MRCU;

7. The magnetic levitation train wireless communication system of any one of claims 1 to 6, wherein determining the corresponding launch strategy based on the target DSC of the uplink data comprises:

8. A magnetic levitation wireless communication system as recited in claim 7, wherein the DSC identity is DSCIP.