CN111106844A - Switching method of universal user identification card of vehicle-mounted access unit - Google Patents

Abstract

The invention discloses a switching method of a universal user identity identification card of a vehicle-mounted access unit, which comprises the following steps of S1, setting a physical cell identifier in a subway line network corresponding to a subway test line circuit as a first preset identifier in advance; step S2, searching the physical cell identification in the currently accessed subway line network in real time by adopting a vehicle-mounted access unit and recording the physical cell identification as the current cell identification; step S3, judging whether the current cell identification is the same as the configured first preset identification in real time; if so, the vehicle-mounted access unit controls the selector switch to the second line; if not, the vehicle-mounted access unit controls the change-over switch to be switched to the first line. Has the advantages that: manual intervention is not needed, the operation is convenient, and the switching speed is improved. Has the advantages that: the switching between the first line and the second line is automatically completed without manual intervention, and the operation is convenient, so that the switching speed of the universal user identity identification card is improved.

Description

Switching method of universal user identification card of vehicle-mounted access unit

Technical Field

The invention relates to the technical field of wireless communication, in particular to a switching method of a universal user identification card of a vehicle-mounted access unit.

Background

The train test line of the urban rail transit train section is a line for static and dynamic debugging and testing of subway trains, new trains and overhauled trains can be operated on the main line only after debugging and performance testing are completed on the train test line, all systems on the train test line are completely the same as the main line configuration for the purpose of exerting the function of the train test line to the maximum extent, and meanwhile, the systems on the train test line and the main line are completely independent and physically isolated for ensuring the safety of the main line.

The urban rail transit System adopts an LTE (Long Term Evolution) technology, provides vehicle-ground bidirectional wireless data transmission for CBTC (Communication Based Train Control System), PIS (passenger information System), CCTV (closed Circuit Television monitoring) and other services, and adopts an active line and active line independent networking mode to ensure Communication safety and ensure that a test run line is completely isolated from an LTE vehicle-ground wireless network and a wired network of the active line. The test run line is provided with the same LTE base station system as the main line: the Radio Remote Unit comprises EPC (Evolved Packet Core), BBU (building base band Unit), and RRU (Remote Radio Unit). Fig. 1 is a schematic diagram of a forward/trial run LTE vehicle-to-ground wireless communication system.

In order to ensure communication security, Access and service transmission of a main line and a test line TAU (vehicle Access Unit) need to be strictly isolated, registration information of USIM (Universal Subscriber Identity Module) cards also needs to be completely independent, the TAU configures the dual-purpose USIM cards, and the two USIMs are only registered in a main line or a test line LTE network respectively: and a USIM (Universal subscriber identity Module) is used during the operation of the main line, and a USIM is used during the adjustment of the test line.

In order to meet the functional requirements of the urban rail transit test run line, two sets of LTE vehicle-ground wireless communication systems of the normal/test run line and USIM registration information of a universal user identity card are completely independent. The TAU needs to configure a dual universal subscriber identity module USIM, and needs to implement switching of the dual universal subscriber identity module USIM: the train enters a train test line from a positive line, the TAU is switched to a Universal Subscriber Identity Module (USIM) of the train test line and is accessed to a LTE (Long term evolution) network of the train test line, and train-ground communication is taken over by the LTE network of the train test line; and when the train enters the main line from the test line, the TAU is switched to the USIM (Universal subscriber identity Module) of the main line and is re-accessed to the LTE network, and the train-ground communication is taken over by the LTE network.

In order to realize the switching of the Universal Subscriber Identity Module (USIM) of the train line/test line, the conventional solution is to design a USIM switch of the universal subscriber identity module on a TAU, when a train enters a test line from a train line, the switch is dialed to the position of the USIM of the test line universal subscriber identity module, the USIM of the test line universal subscriber identity module is selected, the TAU is re-attached to a network, and the LTE system of the test line is accessed. When the train returns to the main line from the test line, the change-over switch is switched to the position of the USIM of the main line universal subscriber identity module, the USIM of the main line universal subscriber identity module is selected, the TAU is re-attached to the network, and the main line LTE system is accessed.

The main defects of the existing scheme are that USIM switching of the universal user identity card is realized by shifting a switch, manual operation is needed, and field operation is inconvenient.

Disclosure of Invention

In view of the above problems in the prior art, a method for switching a universal subscriber identity module card of a vehicle access unit is provided.

The specific technical scheme is as follows:

a switching method of a universal user identification card of a vehicle-mounted access unit is applied to a subway line; the subway access system is characterized in that a vehicle-mounted access unit is arranged on the subway line, a main line access identification unit corresponding to the subway main line and a test run line access identification unit corresponding to the subway test run line are provided in the vehicle-mounted access unit, the main line access identification unit and the test run line access identification unit are both used for independently providing a function of accessing a subway line network, and the main line access identification unit and the test run line access identification unit share a network communication interface;

the vehicle-mounted access unit is also provided with a selector switch, and the selector switch is used for switching between a first line between the main line access identification unit and the network communication interface and a second line between the test run line access identification unit and the network communication interface;

the initial state of the vehicle-mounted access unit is to access the first line;

further comprising the steps of:

step S1, setting a physical cell identifier in the subway line network corresponding to the subway test line as a first preset identifier in advance;

step S2, searching the physical cell identification in the subway line network which is accessed currently in real time by adopting the vehicle-mounted access unit and recording the physical cell identification as the current cell identification;

step S3, judging whether the current cell identification is the same as the configured first preset identification in real time;

if so, the vehicle-mounted access unit controls the change-over switch to be switched to the second line;

if not, the vehicle-mounted access unit controls the selector switch to the first line.

Preferably, the vehicle-mounted access unit provides a local maintenance port or a remote management port, so as to configure a physical cell identifier in the subway line network corresponding to the subway test line as a first preset identifier.

Preferably, the vehicle-mounted access unit further provides an LTE module, and the LTE module searches for a physical cell identifier in the currently accessed subway line network in real time and records the physical cell identifier as a current cell identifier.

Preferably, the vehicle-mounted access unit further provides a vehicle-mounted access main control module, and the vehicle-mounted access main control module sets the initial state of the vehicle-mounted access unit as the first line access, and sets the last switch state of the change-over switch as the positive line state.

Preferably, the vehicle-mounted access master control module controls the change-over switch to be switched to the second line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a test line state or not;

if not, resetting the LTE module, setting the last switch state of the change-over switch as a vehicle test line state, reading the data of the second line, and accessing a vehicle test line LTE network to establish a vehicle-ground wireless communication link;

if yes, continuously tracking whether the first preset identification changes.

Preferably, the vehicle-mounted access master control module controls the change-over switch to be switched to the first line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a positive line state;

if not, resetting the LTE module, setting the last switching state of the selector switch to be a positive line state, reading the data of the first line, and accessing a positive line LTE network to establish a vehicle-ground wireless communication link;

if yes, continuously tracking whether the first preset identification changes.

Preferably, the main line access identification unit is a main line universal user identity identification card;

the test run line access identification unit is a test run line general user identification card.

Preferably, the switch is an electronic switch.

The technical scheme of the invention has the beneficial effects that: the switching method of the universal user identification card of the vehicle-mounted access unit is characterized in that whether a subway line is on a test run line or a positive line is judged according to the comparison of a current cell identifier searched by the vehicle-mounted access unit in real time and a configured physical cell identifier, the switching of a first line and a second line is automatically completed, manual intervention is not needed, operation is convenient, and therefore the switching speed of the universal user identification card is improved.

Drawings

Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.

Fig. 1 is a schematic diagram of a forward/test run LTE vehicle-ground wireless communication system in the prior art;

fig. 2 is a flowchart of a method for switching a universal subscriber identity module card of a vehicle access unit according to an embodiment of the present invention;

fig. 3 is an expanded schematic diagram of a universal subscriber identity module card interface expansion of a switching method of a universal subscriber identity module card of a vehicle access unit according to an embodiment of the present invention;

fig. 4 is a flow chart of selecting a universal subscriber identity module card for a front/test run line of a method for switching a universal subscriber identity module card of a vehicle access unit 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.

The invention includes a switching method of the general user identification card of the vehicle carried access unit, apply to the subway line; the system is characterized in that a vehicle-mounted access unit is arranged on a subway line, a main line access identification unit corresponding to the subway main line and a test run line access identification unit corresponding to the subway test run line are provided in the vehicle-mounted access unit, the main line access identification unit and the test run line access identification unit are used for independently providing a function of accessing a subway line network, and the main line access identification unit and the test run line access identification unit share a network communication interface;

the vehicle-mounted access unit is also provided with a change-over switch, and the change-over switch is used for switching between a first line between the positive line access identification unit and the network communication interface and a second line between the trial run line access identification unit and the network communication interface;

the initial state of the vehicle-mounted access unit is to access a first line;

further comprising the steps of:

step S1, setting a physical cell identifier in a subway line network corresponding to a subway test line as a first preset identifier in advance;

step S2, searching the physical cell identification in the currently accessed subway line network in real time by adopting a vehicle-mounted access unit and recording the physical cell identification as the current cell identification;

step S3, judging whether the current cell identification is the same as the configured first preset identification in real time;

if so, the vehicle-mounted access unit controls the selector switch to the second line;

if not, the vehicle-mounted access unit controls the change-over switch to be switched to the first line.

According to the technical scheme of the switching method of the universal subscriber identity module card of the vehicle-mounted access unit, as shown in fig. 2, the positive line access identification unit is a positive line universal subscriber identity module card, the test run line access identification unit is a test run line universal subscriber identity module card, and the switch is an electronic switch.

Furthermore, the current cell identification searched in real time by the vehicle-mounted access unit is compared with the configured physical cell identification, whether the subway line is on a test run line or a positive line is judged, switching between the first line and the second line is automatically completed, manual intervention is not needed, operation is convenient, and therefore the switching speed of the universal user identity identification card is improved.

In the foregoing technical solution, as a preferred embodiment, as shown in fig. 3, the vehicle-mounted access unit provides a local maintenance port or a remote management port, so as to configure a physical cell identifier in the subway line network corresponding to the subway test line as a first preset identifier.

In the above technical solution, as a preferred embodiment, as shown in fig. 3, the vehicle-mounted access unit further provides an LTE module, and the LTE module searches for a physical cell identifier in a currently accessed subway line network in real time and records the physical cell identifier as a current cell identifier.

In the foregoing technical solution, as a preferred embodiment, as shown in fig. 3, the vehicle-mounted access unit further provides a vehicle-mounted access main control module, and the vehicle-mounted access main control module sets an initial state of the vehicle-mounted access unit as accessing the first line, and sets a last switch state of the switch as a positive line state.

In the above technical solution, as a preferred embodiment, as shown in fig. 4, the vehicle-mounted access main control module controls the switch to the second line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a test line state or not;

if not, resetting the LTE module, setting the last switch state of the change-over switch as a vehicle test line state, reading data of a second line, and accessing a vehicle test line LTE network to establish a vehicle-ground wireless communication link;

if yes, whether the first preset identification changes or not is tracked continuously.

In the above technical solution, as a preferred embodiment, as shown in fig. 4, the vehicle-mounted access main control module controls the switch to the first line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a positive line state;

if not, resetting the LTE module, setting the last switching state of the selector switch to be a positive line state, reading data of the first line, and accessing the positive line LTE network to establish a vehicle-ground wireless communication link;

if yes, whether the first preset identification changes or not is tracked continuously.

In the prior art, an LTE module LTE in a vehicle-mounted input unit TAU has only one USIM interface, and normally, only one USIM can be connected to the LTE module LTE, so that two or more USIMs can be configured.

For the defects existing in the prior art, in the present technical solution, as shown in fig. 3, the switch provides a first interface and a second interface; the first interface is connected with a positive line universal user identity identification card, namely, the change-over switch is switched to a first line between the positive line access identification unit and the network communication interface; the second interface is connected with a universal user identity identification card of the test run line, namely, the selector switch is switched to a second circuit between the test run line access identification unit and the network communication interface, wherein the LTE module LTE is connected through an interface bus of the universal user identity identification card.

Further, as shown in fig. 4, the innovation point of the technical solution is that the vehicle-mounted input unit TAU automatically switches the switch to the corresponding universal subscriber identity module USIM according to a comparison result, where the physical Cell identifier pci (physical Cell identifier) of the LTE network searched by the LTE module LTE is recorded as a current Cell identifier and compared with a preset first preset identifier.

Further, a local maintenance or remote management interface provided by the vehicle-mounted input unit TAU configures a physical cell identifier PCI in a subway line network corresponding to a subway test line to be set as a first preset identifier PCI1, then the vehicle-mounted input unit TAU reads the physical cell identifier searched by the LTE module LTE to be a current cell identifier PCI2, and compares the first preset identifier PCI1 with the current cell identifier PCI 2;

if the two signals are the same, the train is in a test line, and the vehicle-mounted input unit TAU automatically switches the change-over switch to a universal user identity identification card USIM of the test line.

Then, further judging whether the switch state of the change-over switch is changed for the first time (for example, judging whether the last switch state of the change-over switch is a test line state), if not, indicating that the LTE network to which the vehicle-mounted input unit TAU needs to be accessed is changed (for example, indicating that a train just enters a test line from a main line), resetting the LTE module LTE, setting the last switch state of the change-over switch as the test line state, and after reading data of a second line (for example, a test line universal subscriber identity module USIM), accessing the test line LTE network to establish a train-site wireless communication link; if the switch state is not changed (for example, the last switch state of the change-over switch is a test line state), it is indicated that the train has been normally accessed to the test line LTE network, and is always running on the test line, and the LTE module LTE does not need to be reset, and then whether the physical cell identifier PCI in the subway line network corresponding to the subway test line is changed or not is continuously observed;

if the train is not the same as the USIM, the train is on the positive line, and the vehicle-mounted input unit TAU automatically switches the change-over switch to the universal user identity identification card USIM on the positive line.

Then, further judging whether the switch state is changed for the first time (for example, judging whether the last switch state of the change-over switch is a positive line state), if not, indicating that the LTE network to which the vehicle-mounted input unit TAU needs to be accessed is changed (for example, indicating that a train just enters a positive line from a trial run), resetting the LTE module LTE, setting the last switch state of the change-over switch to be the positive line state, and accessing the positive line LTE network after the LTE module LTE reads data of a first line (for example, a positive line universal subscriber identity module USIM), so as to establish a vehicle-ground wireless communication link; if the switch state is not changed (for example, the last switch state of the change-over switch is a positive line state), which indicates that the train has normally accessed the positive line LTE network and is always running on the positive line, then whether the physical cell identifier PCI in the subway line network corresponding to the subway train test line changes or not is continuously observed.

Further, by adopting the switching method, whether the subway line is on a test run line or a positive line is judged according to the comparison between the current cell identification searched by the vehicle-mounted access unit in real time and the configured physical cell identification, the switching between the first line and the second line is automatically completed, manual intervention is not needed, the operation is convenient, and the switching speed of the universal user identity identification card is improved.

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 switching method of a universal user identification card of a vehicle-mounted access unit is applied to a subway line; the subway access system is characterized in that a vehicle-mounted access unit is arranged on the subway line, a main line access identification unit corresponding to the subway main line and a test run line access identification unit corresponding to the subway test run line are provided in the vehicle-mounted access unit, the main line access identification unit and the test run line access identification unit are both used for independently providing a function of accessing a subway line network, and the main line access identification unit and the test run line access identification unit share a network communication interface;

the vehicle-mounted access unit is also provided with a selector switch, and the selector switch is used for switching between a first line between the main line access identification unit and the network communication interface and a second line between the test run line access identification unit and the network communication interface;

the initial state of the vehicle-mounted access unit is to access the first line;

further comprising the steps of:

step S1, setting a physical cell identifier in the subway line network corresponding to the subway test line as a first preset identifier in advance;

step S2, searching the physical cell identification in the subway line network which is accessed currently in real time by adopting the vehicle-mounted access unit and recording the physical cell identification as the current cell identification;

step S3, judging whether the current cell identification is the same as the configured first preset identification in real time;

if so, the vehicle-mounted access unit controls the change-over switch to be switched to the second line;

if not, the vehicle-mounted access unit controls the change-over switch to be switched to the first line.

2. The handover method according to claim 1, wherein the vehicular access unit provides a local maintenance port or a remote management port for configuring the physical cell identifier in the subway line network corresponding to the subway test line as a first predetermined identifier.

3. The handover method according to claim 1, wherein the vehicle-mounted access unit further provides an LTE module, and the LTE module searches for a physical cell identifier in the currently accessed subway line network in real time and records the physical cell identifier as a current cell identifier.

4. The switching method according to claim 3, wherein the vehicle-mounted access unit further provides a vehicle-mounted access main control module, the vehicle-mounted access main control module sets an initial state of the vehicle-mounted access unit as accessing the first line, and sets a last switch state of the switch to a positive line state.

5. The switching method according to claim 4, wherein the vehicular access master control module controls the switch to the second line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a test line state or not;

if not, resetting the LTE module, setting the last switch state of the change-over switch as a vehicle test line state, reading the data of the second line, and accessing a vehicle test line LTE network to establish a vehicle-ground wireless communication link;

if yes, continuously tracking whether the first preset identification changes.

6. The switching method according to claim 4, wherein the vehicular access master control module controls the switch to the first line;

further comprising the steps of:

judging whether the last switch state of the change-over switch is a positive line state;

if not, resetting the LTE module, setting the last switching state of the selector switch to be a positive line state, reading the data of the first line, and accessing a positive line LTE network to establish a vehicle-ground wireless communication link;

if yes, continuously tracking whether the first preset identification changes.

7. The handover method according to claim 1, wherein the positive line access identification unit is a positive line universal subscriber identity module card;

the test run line access identification unit is a test run line general user identification card.

8. The switching method according to claim 1, wherein the changeover switch is an electronic switch.

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