CN115278936B - Blocking method and system for radio frequency emission of wireless terminal of airborne avionics equipment - Google Patents
Blocking method and system for radio frequency emission of wireless terminal of airborne avionics equipment Download PDFInfo
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- 238000012217 deletion Methods 0.000 claims description 8
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- 238000004891 communication Methods 0.000 abstract description 13
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/30—Connection release
- H04W76/38—Connection release triggered by timers
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Abstract
The invention provides a blocking method and a blocking system for radio frequency emission of a wireless terminal of airborne avionics equipment, and relates to the technical field of communication. According to the method, the electronic switch is matched with software control, on one hand, the electronic switch is arranged on the radio frequency transmission line, and when the user terminal receives a radio frequency closing command of the airborne central control equipment, the electronic switch can be immediately closed to block radio frequency continuous outward emission; on the other hand, under the condition of ensuring the normal communication protocol through the timer and the AT instruction, the time consumed in the shutdown and detachment process is shortened, and the radio frequency emission of the wireless terminal is rapidly blocked. The problem that the wireless terminal module cannot work normally next time possibly caused by rough outage is avoided, and the rigid requirement of blocking the radio frequency emission of the wireless terminal of the airborne avionics is guaranteed.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a blocking method and a blocking system for radio frequency emission of a wireless terminal of airborne avionics equipment.
Background
When the 4/5G terminal module is used for data transmission, the 4/5G terminal module needs to communicate with the base station, frequent radio frequency emission needs to be kept at the moment, and background clutter generated by the radio frequency emission can cause interference to navigation signals of an airplane, so that flight safety is affected. Therefore, all avionics using the 4/5G terminal module need to completely shut down the rf function before take-off, which requires immediate validation and cannot be failed to shut down due to anomalies in execution.
On the one hand, when the terminal module is powered off, a Switch off is used as a cause value to send a Detach Request signaling (power off Detach) to the network side, a default EPS bearer established in the previous process of network detachment is requested, and a power off state is registered in the core network element. Depending on the quality of the current air interface signal, the process may last for more than 15s, which takes a long time. On the other hand, if the wireless terminal module is directly powered off to block the radio frequency transmission process in order to increase the speed, two problems may occur:
(1) The subsequent protocol flow is abnormal;
If a terminal protocol stack is performing a write operation on a certain configuration, the write operation may be incomplete due to power failure, an error occurs in the content of the configuration, and a flow abnormality occurs when the terminal protocol stack is started next time;
2) MCP memory hardware corruption;
if the MCP memory is powered down in the writing operation process, the hardware of the memory can be damaged, the memory cannot be started normally next time, and the memory is powered up.
In view of the foregoing, there is a need for a method that can quickly block the radio frequency transmission process of a wireless terminal and ensure that the wireless terminal module functions properly.
Disclosure of Invention
The invention aims to provide a blocking method and a blocking system for radio frequency emission of a wireless terminal of airborne avionics equipment, which can shorten the time for shutdown and adhesion removal by matching software control with an electronic switch and timely and rapidly block the radio frequency emission of the wireless terminal.
Embodiments of the present invention are implemented as follows:
In a first aspect, an embodiment of the present application provides a method for blocking radio frequency emission of a wireless terminal of an airborne avionics device, including:
When the user terminal receives the radio frequency closing command, an electronic switch on the radio frequency transmission line is closed to block radio frequency emission;
the user terminal sends an attachment removing request to the base station and starts a timer;
The base station receives the detach request and sends the detach request to the core network;
the core network empties all EPS bearing and TEID resources corresponding to the user terminal according to the detach request, and sends a request for releasing the context of the user terminal to the base station;
the base station receives the context request of the user terminal, sends a message for releasing RRC connection to the user terminal, and sends a response message to the core network after releasing the context information of the user terminal;
If the user terminal receives the RRC connection releasing message within the set time of the timer, stopping timing, emptying all EPS bearing and RB resources, and sending an AT instruction to a wireless Modem module of the user terminal to close radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
Based on the first aspect, in some embodiments of the invention, the method further includes:
The user terminal sends a random access request to the base station;
the base station receives the random access request and sends a random access response message to the user terminal;
the user terminal receives the random access response message and sends an RRC connection request to the base station;
The base station receives the RRC connection request and sends an RRC connection allowing message to the user terminal;
the user terminal establishes a connection with the base station according to the RRC connection allowed message.
Based on the first aspect, in some embodiments of the invention, the method further includes:
if the detach request of the user terminal carries the instruction information that the user terminal is not powered off, the core network empties all EPS bearing and TEID resources corresponding to the user terminal after receiving the detach request and before sending a request for releasing the context of the user terminal to the base station, and sends a detach accept message to the base station;
the base station receives the detach accept message and transmits the detach accept message to the user terminal.
Based on the first aspect, in some embodiments of the present invention, the core network includes a mobility management module MME and a service gateway SGW;
after receiving the detach request sent by the base station, the mobility management module MME sends a request for deleting EPS bearing to the service gateway SGW;
the service gateway SGW empties all EPS bearing and TEID resources corresponding to the user terminal according to the EPS bearing deleting request, and sends an EPS bearing deleting response message to a mobility management module MME;
And the mobility management module MME confirms the deletion of the bearer according to the EPS bearer deletion response message and then sends a request for releasing the context of the user terminal to the base station.
Based on the first aspect, in some embodiments of the present invention, when the core network sends a request for releasing the context of the ue to the base station, the context information of the ue carries the detach request.
Based on the first aspect, in some embodiments of the invention, when the detach request is a switch off request, the releasing ue context information carries a cell cause IECause: switch off detach;
When the detach request is a normal request, the releasing ue context information carries a cell cause IECause: normal detach.
In a second aspect, an embodiment of the present application provides a blocking system for radio frequency emission of a wireless terminal of an airborne avionics device, including:
the radio frequency electronic switch control module is used for closing an electronic switch on a radio frequency transmission line to block radio frequency emission when the user terminal receives a radio frequency closing command;
The detach request initiating module sends a detach request to the base station by the user terminal and starts a timer;
The base station receives the detach request and sends the detach request to the core network, and the core network empties all EPS bearers and TEID resources corresponding to the user terminal according to the detach request and sends a request for releasing the context of the user terminal to the base station;
The base station receives the request for releasing the context of the user terminal, sends a message for releasing RRC connection to the user terminal, and sends a response message to the core network after the context information of the user terminal is released;
The radio frequency emission closing module is used for stopping timing if the user terminal receives the RRC connection releasing message within the set time of the timer, emptying all EPS bearing and RB resources, and sending an AT instruction to the wireless Modem module of the user terminal to close radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
Based on the second aspect, in some embodiments of the present invention, the above system further includes an RRC connection establishment module configured to establish an RRC connection between the user terminal and the base station when the user terminal is in the IDLE state.
In a third aspect, an embodiment of the present application provides an electronic device, including a memory for storing one or more programs; a processor. The method as described in any one of the first aspects is implemented when the one or more programs are executed by the processor.
In a fourth aspect, an embodiment of the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as described in any of the first aspects above.
Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:
The embodiment of the application provides a blocking method and a blocking system for radio frequency emission of a wireless terminal of an airborne avionics device, wherein the blocking method and the blocking system firstly send a take-off signal when a user terminal is in a radio frequency closing command (when an airplane takes off, the take-off radio frequency operation is executed), an electronic switch on a radio frequency transmission line is closed to block the radio frequency emission, then the user terminal sends a request for removing adhesion to a base station and starts a timer, the base station receives the request for removing adhesion and sends the request for removing adhesion to a core network, then the core network clears all EPS bearing and TEID resources corresponding to the user terminal according to the request for removing adhesion, and sends a request for releasing context of the user terminal to the base station, the base station sends a message for releasing RRC connection to the user terminal after receiving the request for releasing context information of the user terminal, and finally, if the user terminal receives the message for releasing RRC connection in a set time of the timer, the base station stops timing, all the bearing and RB are cleared, and an AT command is sent to a Modem module of the user terminal to close the radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission. In the application, the electronic switch is matched with the software control, on one hand, by arranging the electronic switch on the radio frequency transmission line, when the user terminal receives a radio frequency closing command, the electronic switch can be immediately closed to block the radio frequency from continuously emitting outwards; on the other hand, under the condition of ensuring the normal communication protocol through the timer and the AT instruction, the time consumed in the shutdown and detachment process is shortened, and the radio frequency emission of the wireless terminal is rapidly blocked. The problem that the wireless terminal module cannot work normally next time possibly caused by rough outage is avoided, and the rigid requirement of blocking the radio frequency emission of the wireless terminal of the airborne avionics is guaranteed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of an embodiment of a method for blocking radio frequency emission of a wireless terminal for an airborne avionics device according to the present invention;
Fig. 2 is a schematic flow chart of another embodiment of a method for blocking radio frequency emission of a wireless terminal for an airborne avionics device according to the present invention;
fig. 3 is a schematic flow chart of another embodiment of a method for blocking radio frequency emission of a wireless terminal for an airborne avionics device according to the present invention;
fig. 4 is a block diagram of a system for blocking radio frequency emission of a wireless terminal of an airborne avionics device according to the present invention;
Fig. 5 is a block diagram of an electronic device according to an embodiment of the present invention.
Icon: 1. a memory; 2. a processor; 3. a communication interface; 11. a radio frequency electronic switch control module; 12. a detach request initiation module; 13. a bearer deletion module; 14. a user terminal context release module; 15. and the radio frequency emission closing module.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Some embodiments of the present application are described in detail below with reference to the accompanying drawings. The various embodiments and features of the embodiments described below may be combined with one another without conflict.
Examples
The terms used in the present specification will be briefly described below before being described with reference to the accompanying drawings:
UE: user terminal equipment/mobile station, which represents a terminal device.
ENB: an eNodeB (evolved Node B) installed outdoors as a base station of an evolved packet core network (EPC).
EPC: evolved Packet Core 4G core network, 3GPP evolved packet core network, mainly includes radio interface long term evolution (Long Term Evolution, LTE) and system architecture evolution (System Architecture Evolution, SAE).
EPS: evolved PACKET SYSTEM, evolved packet system.
RB: resource Block, resource Block.
TEID: the endpoint IDs of tunnels configured between nodes in the network, which are set for respective parts in units of respective bearers of the UE, play an identifying role.
MME: mobility MANAGEMENT ENTITY, mobility management entity. Is mainly responsible for mobility management of a control plane, user context and mobility state management, allocation of user temporary identity and the like, and plays a role in controlling various entities in the EPS to provide session and mobility for the UE.
SGW: SERVING GATEWAY, a service gateway. The SGW is a user anchor point between different access networks in the 3GPP and is responsible for data exchange of a user plane when a user moves between different access technologies so as to shield interfaces of the different access networks in the 3GPP and bear gateway functions of the EPC.
Referring to fig. 1, fig. 1 is a flowchart of a method for blocking radio frequency emission of a wireless terminal of an airborne avionics device according to an embodiment of the present application, where the method includes the following steps:
Step S1: when a user terminal (UE) receives a radio frequency closing command, an electronic switch on a radio frequency transmission line is closed to block radio frequency emission;
in the above steps, the aircraft will send out a take-off signal during take-off, and then the radio frequency closing operation is required to be executed, so that the interference of the background clutter generated by the radio frequency emission on the navigation signal of the aircraft is avoided, and the flight safety is influenced. After the signal indicating take-off is sent out, the user terminal receives the radio frequency closing command and closes an electronic switch (namely a radio frequency switch) arranged on the radio frequency transmission line according to the command, so that the radio frequency transmitting process of the user terminal is blocked. The radio frequency switch has the characteristics of high isolation, low insertion loss, low power consumption, high linearity, small size and light weight, and can effectively block the continuous outward emission of radio frequency when used in a communication system.
Illustratively, the user terminal (UE) includes a mobile phone, a smart terminal, a multimedia device, a streaming media device, and so on.
Step S2: the user terminal sends an attachment removing request to the base station and starts a timer;
In the above steps, the user terminal (UE) sends a detach request to the base station (eNB) first, and starts a timer to start timing, so that all EPS bearers and RB resources are immediately emptied after the timing is finished, the connection with the base station is disconnected, the time consumed in the shutdown detach process is shortened under the condition that the communication protocol is ensured to be normal, and the radio frequency emission of the wireless terminal is rapidly blocked. After sending the detach request (detach request) message, the user terminal (UE) stores its current NAS security context, GUTI and TA information, and deletes the EPS bearer context. The deltach request includes information such as GUTI, KSI-ASME, DETACH TYPE (Switch Off), etc., specifically, GUTI refers to a user ID allocated by EPC when connected to a network; KSI-ASME refers to a KSI value used by a user terminal (UE); DETACH TYPE refers to the type of detach to indicate to the EPC whether the reason for detachment is switch off or normal detach.
Further, referring to fig. 1 and 2, when a user terminal (UE) is in a non-connected state, a connection needs to be established with a base station (eNB) before the user terminal (UE) sends a request for attachment to the base station (eNB). Specific: firstly, a user terminal (UE) sends a random access request to a base station (eNB), the base station (eNB) sends a random access response message to the user terminal (UE) after receiving the random access request, then the user terminal (UE) receives the random access response message and sends an RRC connection request to the base station (eNB), the base station (eNB) sends an RRC connection permission message to the user terminal (UE) after receiving the RRC connection request, and finally the user terminal (UE) establishes connection with the base station (eNB) according to the RRC connection permission message.
Step S3: the base station receives the detach request and sends the detach request to the core network;
In the above steps, the base station (eNB) receives the detach request and transmits to the core network (EPC), so that the core network (EPC) can know the intention of the user terminal (UE) to detach and process the NAS security context.
Step S4: the core network empties all EPS bearing and TEID resources corresponding to the user terminal according to the detach request, and sends a request for releasing the context of the user terminal to the base station;
In the above steps, after receiving the detach request, the core network (EPC) stores the current NAS security context of the user and checks the type of detach, for example, whether it is switch off or normal detach. If the detach request is for a reason other than switch off, the core network (EPC) will send DETACH ACCEPT a message to the user terminal (UE) as a response to the detach request (detach request) message. And simultaneously, clearing all EPS bearing and TEID resources corresponding to the user terminal according to the detach request, and sending a request for releasing the context of the user terminal to the base station so as to release all network/wireless resources allocated to the user.
For example, the information requesting to release the context of the ue carries a reason for the detach request, and when the detach request is a switch off request, the information requesting to release the context of the ue carries a reason IECause for the cell: switch off detach; when the detach request is a normal request, the releasing ue context information carries a cell cause IECause: normal detach.
Specifically, referring to fig. 3, the core network (EPC) includes a mobility management module MME and a service gateway SGW. After receiving a detach request sent by a base station, a mobility management module MME sends a request for deleting EPS bearing to a service gateway SGW; then, the service gateway SGW empties all EPS bearing and TEID resources corresponding to the user terminal according to the EPS bearing deleting request, and sends an EPS bearing deleting response message to the mobility management module MME; and finally, the mobility management module MME confirms the deletion of the bearer according to the EPS bearer deletion response message and sends a request for releasing the context of the user terminal to the base station.
The context information includes, for example, created connection information, such as APN, PGW, QCI, etc., EPS Bearer information, such as EBI, QCI, uplink and downlink AMBR, control plane and user plane addresses, etc., and some dynamic data, such as capabilities of the terminal (capabilities), a Bearer list that has been created, etc. When the core network (EPC) receives the detach request, it needs to find the context information, IP, created bearer, etc. corresponding to the user terminal (UE), so as to clear and release it after decryption, and disconnect the context session connection with the user terminal (UE).
Step S5: the base station receives the context request of the user terminal, sends a message for releasing RRC connection to the user terminal, and sends a response message to the core network after releasing the context information of the user terminal;
In the above steps, after receiving the context request (Context Release Command) from the EPC, the base station (eNB) sends a release RRC connection message (RRC Connection Release) to the user terminal (UE) to release any RRC connection that is not released, deletes all context information related to the UE, and finally sends a response message (UEContext Release Complete) to the core network (EPC) as a response to the context request (Context Release Command) message of the release user terminal.
Step S6: if the user terminal receives the RRC connection releasing message within the set time of the timer, stopping timing, emptying all EPS bearing and RB resources, and sending an AT instruction to a wireless Modem module of the user terminal to close radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
In the above steps, under the condition of ensuring the normal communication protocol by the timer and the AT instruction, the time consumed in the shutdown and detachment process is shortened, the radio frequency emission of the wireless terminal can be blocked rapidly, the problem that the wireless terminal module cannot work normally next time possibly caused by rough outage is avoided, and the rigid requirement of rapidly blocking the radio frequency emission of the wireless terminal of the airborne avionics equipment is ensured.
Based on the same inventive concept, the application also provides a blocking system for radio frequency emission of a wireless terminal of an airborne avionics device, and referring to fig. 4, fig. 4 is a block diagram of a blocking system for radio frequency emission of a wireless terminal of an airborne avionics device according to an embodiment of the application. The system comprises:
The radio frequency electronic switch control module 11 is used for closing an electronic switch on a radio frequency transmission line to block radio frequency emission when the user terminal receives a radio frequency closing command;
A detach request initiation module 12, in which the user terminal transmits a detach request to the base station and starts a timer;
The bearer deletion module 13 is used for receiving the detach request by the base station and sending the detach request to the core network, and the core network empties all EPS bearers and TEID resources corresponding to the user terminal according to the detach request and sends a request for releasing the context of the user terminal to the base station;
A ue context release module 14, where the base station receives a ue context release request, sends a RRC connection release message to the ue, and sends a response message to the core network after releasing the ue context information;
The radio frequency emission closing module 15, if the user terminal receives the RRC connection message release within the set time of the timer, the timing is stopped, all EPS bearing and RB resources are emptied, and an AT instruction is sent to the wireless Modem module of the user terminal to close the radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
Referring to fig. 5, fig. 5 is a block diagram of an electronic device according to an embodiment of the present application. The electronic device comprises a memory 1, a processor 2 and a communication interface 3, wherein the memory 1, the processor 2 and the communication interface 3 are electrically connected with each other directly or indirectly so as to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The memory 1 may be used for storing software programs and modules, such as program instructions/modules corresponding to a blocking system for radio frequency emission of a wireless terminal of an avionics device provided in an embodiment of the present application, and the processor 2 executes the software programs and modules stored in the memory 1, thereby executing various functional applications and data processing. The communication interface 3 may be used for communication of signaling or data with other node devices.
The Memory 1 may be, but is not limited to, a random access Memory (Random Access Memory, RAM), a Read Only Memory (ROM), a programmable Read Only Memory (Programmable Read-Only Memory, PROM), an erasable Read Only Memory (Erasable Programmable Read-Only Memory, EPROM), an electrically erasable Read Only Memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.
The processor 2 may be an integrated circuit chip with signal processing capabilities. The processor 2 may be a general-purpose processor including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal processor (DIGITAL SIGNAL Processing, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field-Programmable gate array (Field-Programmable GATE ARRAY, FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components.
It will be appreciated that the configuration shown in fig. 5 is merely illustrative, and that the electronic device may also include more or fewer components than shown in fig. 5, or have a different configuration than shown in fig. 1. The components shown in fig. 5 may be implemented in hardware, software, or a combination thereof.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. The apparatus embodiments described above are merely illustrative, for example, of the flowcharts and block diagrams in the figures that illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
In addition, functional modules in the embodiments of the present application may be integrated together to form a single part, or each module may exist alone, or two or more modules may be integrated to form a single part.
The functions, if implemented in the form of software functional modules and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A method for blocking radio frequency emissions of a wireless terminal for an airborne avionics device, comprising:
When the user terminal receives the radio frequency closing command, an electronic switch on the radio frequency transmission line is closed to block radio frequency emission;
the user terminal sends an attachment removing request to the base station and starts a timer;
The base station receives the detach request and sends the detach request to the core network;
the core network empties all EPS bearing and TEID resources corresponding to the user terminal according to the detach request, and sends a request for releasing the context of the user terminal to the base station;
the base station receives the context request of the user terminal, sends a message for releasing RRC connection to the user terminal, and sends a response message to the core network after releasing the context information of the user terminal;
If the user terminal receives the RRC connection releasing message within the set time of the timer, stopping timing, emptying all EPS bearing and RB resources, and sending an AT instruction to a wireless Modem module of the user terminal to close radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
2. A method of blocking radio frequency emissions of a wireless terminal for an airborne avionics device as claimed in claim 1, further comprising:
The user terminal sends a random access request to the base station;
the base station receives the random access request and sends a random access response message to the user terminal;
the user terminal receives the random access response message and sends an RRC connection request to the base station;
The base station receives the RRC connection request and sends an RRC connection allowing message to the user terminal;
the user terminal establishes a connection with the base station according to the RRC connection allowed message.
3. A method of blocking radio frequency emissions of a wireless terminal for an airborne avionics device as claimed in claim 1, further comprising:
If the detach request of the user terminal carries the instruction information that the user terminal is not powered off, the core network empties all EPS bearing and TEID resources corresponding to the user terminal after receiving the detach request and before sending a request for releasing the context of the user terminal to the base station, and sends a detach accept message to the base station;
And the base station receives the detach accept message and sends the detach accept message to the user terminal.
4. The method for blocking radio frequency transmissions of a wireless terminal of an airborne avionics device according to claim 1, wherein the core network comprises a mobility management module MME and a service gateway SGW;
after receiving the detach request sent by the base station, the mobility management module MME sends a request for deleting EPS bearing to a service gateway SGW;
the service gateway SGW empties all EPS bearing and TEID resources corresponding to the user terminal according to the EPS bearing deleting request, and sends an EPS bearing deleting response message to a mobility management module MME;
and the mobility management module MME confirms the deletion of the bearer according to the EPS bearer deletion response message and then sends a request for releasing the context of the user terminal to the base station.
5. A method for blocking radio frequency transmissions of a wireless terminal of an airborne avionics device according to claim 1, characterized in that the release user terminal context information carries the detach request when the core network sends a release user terminal context request to the base station.
6. A method of blocking radio frequency emissions of a wireless terminal for an airborne avionics device as recited in claim 5, further comprising:
When the detach request is a switch off request, the release user terminal context information carries a cell cause IECause: switch off detach;
When the detach request is a normal request, the release user terminal context information carries a cell cause IECause: normal detach.
7. A blocking system for radio frequency emissions of a wireless terminal of an airborne avionics device, comprising:
the radio frequency electronic switch control module is used for closing an electronic switch on a radio frequency transmission line to block radio frequency emission when the user terminal receives a radio frequency closing command;
the user terminal sends a detach request to the base station, starts a timer and empties all EPS bearing and RB resources;
The base station receives the detach request and sends the detach request to the core network, and the core network empties all EPS bearers and TEID resources corresponding to the user terminal according to the detach request and sends a request for releasing the context of the user terminal to the base station;
The base station receives the request for releasing the context of the user terminal, sends a message for releasing RRC connection to the user terminal, and sends a response message to the core network after the context information of the user terminal is released;
The radio frequency emission closing module is used for stopping timing if the user terminal receives the RRC connection releasing message within the set time of the timer, emptying all EPS bearing and RB resources, and sending an AT instruction to the wireless Modem module of the user terminal to close radio frequency emission; if the RRC connection releasing message is not received within the set time of the timer, all EPS bearing and RB resources are directly emptied, and an AT instruction is sent to a wireless Modem module of the user terminal to close radio frequency emission.
8. A blocking system for radio frequency transmissions of a wireless terminal of an airborne avionics device according to claim 7 further comprising an RRC connection establishment module for establishing an RRC connection between the user terminal and the base station when the user terminal is in an IDLE state.
9. An electronic device, comprising:
A memory for storing one or more programs;
A processor;
the method of any of claims 1-6 is implemented when the one or more programs are executed by the processor.
10. A computer readable storage medium, on which a computer program is stored, which computer program, when being executed by a processor, implements the method according to any of claims 1-6.
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